*/
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#ifdef _WIN32
-#include <pcap-stdinc.h>
-#else /* _WIN32 */
-#if HAVE_INTTYPES_H
-#include <inttypes.h>
-#elif HAVE_STDINT_H
-#include <stdint.h>
+#include <pcap-types.h>
+#ifndef _WIN32
+#include <sys/param.h>
+#ifndef MSDOS
+#include <sys/file.h>
#endif
-#ifdef HAVE_SYS_BITYPES_H
-#include <sys/bitypes.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#ifdef HAVE_SYS_SOCKIO_H
+#include <sys/sockio.h>
#endif
-#include <sys/types.h>
+
+struct mbuf; /* Squelch compiler warnings on some platforms for */
+struct rtentry; /* declarations in <net/if.h> */
+#include <net/if.h>
+#include <netinet/in.h>
#endif /* _WIN32 */
#include <stdio.h>
#endif
#include <fcntl.h>
#include <errno.h>
+#include <limits.h>
+
+#include "diag-control.h"
#ifdef HAVE_OS_PROTO_H
#include "os-proto.h"
#include "pcap-int.h"
+#include "optimize.h"
+
#ifdef HAVE_DAG_API
#include "pcap-dag.h"
#endif /* HAVE_DAG_API */
#include "pcap-tc.h"
#endif /* HAVE_TC_API */
-#ifdef PCAP_SUPPORT_USB
+#ifdef PCAP_SUPPORT_LINUX_USBMON
#include "pcap-usb-linux.h"
#endif
#include "pcap-netfilter-linux.h"
#endif
+#ifdef PCAP_SUPPORT_NETMAP
+#include "pcap-netmap.h"
+#endif
+
#ifdef PCAP_SUPPORT_DBUS
#include "pcap-dbus.h"
#endif
+#ifdef PCAP_SUPPORT_RDMASNIFF
+#include "pcap-rdmasniff.h"
+#endif
+
+#ifdef PCAP_SUPPORT_DPDK
+#include "pcap-dpdk.h"
+#endif
+
+#ifdef HAVE_AIRPCAP_API
+#include "pcap-airpcap.h"
+#endif
+
+#ifdef _WIN32
+/*
+ * To quote the WSAStartup() documentation:
+ *
+ * The WSAStartup function typically leads to protocol-specific helper
+ * DLLs being loaded. As a result, the WSAStartup function should not
+ * be called from the DllMain function in a application DLL. This can
+ * potentially cause deadlocks.
+ *
+ * and the WSACleanup() documentation:
+ *
+ * The WSACleanup function typically leads to protocol-specific helper
+ * DLLs being unloaded. As a result, the WSACleanup function should not
+ * be called from the DllMain function in a application DLL. This can
+ * potentially cause deadlocks.
+ *
+ * So we don't initialize Winsock in a DllMain() routine.
+ *
+ * pcap_init() should be called to initialize pcap on both UN*X and
+ * Windows; it will initialize Winsock on Windows. (It will also be
+ * initialized as needed if pcap_init() hasn't been called.)
+ */
+
+/*
+ * Start Winsock.
+ * Internal routine.
+ */
static int
-pcap_not_initialized(pcap_t *pcap)
+internal_wsockinit(char *errbuf)
+{
+ WORD wVersionRequested;
+ WSADATA wsaData;
+ static int err = -1;
+ static int done = 0;
+ int status;
+
+ if (done)
+ return (err);
+
+ /*
+ * Versions of Windows that don't support Winsock 2.2 are
+ * too old for us.
+ */
+ wVersionRequested = MAKEWORD(2, 2);
+ status = WSAStartup(wVersionRequested, &wsaData);
+ done = 1;
+ if (status != 0) {
+ if (errbuf != NULL) {
+ pcap_fmt_errmsg_for_win32_err(errbuf, PCAP_ERRBUF_SIZE,
+ status, "WSAStartup() failed");
+ }
+ return (err);
+ }
+ atexit ((void(*)(void))WSACleanup);
+ err = 0;
+ return (err);
+}
+
+/*
+ * Exported in case some applications using WinPcap/Npcap called it,
+ * even though it wasn't exported.
+ */
+int
+wsockinit(void)
+{
+ return (internal_wsockinit(NULL));
+}
+
+/*
+ * This is the exported function; new programs should call this.
+ * *Newer* programs should call pcap_init().
+ */
+int
+pcap_wsockinit(void)
+{
+ return (internal_wsockinit(NULL));
+}
+#endif /* _WIN32 */
+
+/*
+ * Do whatever initialization is needed for libpcap.
+ *
+ * The argument specifies whether we use the local code page or UTF-8
+ * for strings; on UN*X, we just assume UTF-8 in places where the encoding
+ * would matter, whereas, on Windows, we use the local code page for
+ * PCAP_CHAR_ENC_LOCAL and UTF-8 for PCAP_CHAR_ENC_UTF_8.
+ *
+ * On Windows, we also disable the hack in pcap_create() to deal with
+ * being handed UTF-16 strings, because if the user calls this they're
+ * explicitly declaring that they will either be passing local code
+ * page strings or UTF-8 strings, so we don't need to allow UTF-16LE
+ * strings to be passed. For good measure, on Windows *and* UN*X,
+ * we disable pcap_lookupdev(), to prevent anybody from even
+ * *trying* to pass the result of pcap_lookupdev() - which might be
+ * UTF-16LE on Windows, for ugly compatibility reasons - to pcap_create()
+ * or pcap_open_live() or pcap_open().
+ *
+ * Returns 0 on success, -1 on error.
+ */
+int pcap_new_api; /* pcap_lookupdev() always fails */
+int pcap_utf_8_mode; /* Strings should be in UTF-8. */
+
+int
+pcap_init(unsigned int opts, char *errbuf)
+{
+ static int initialized;
+
+ /*
+ * Don't allow multiple calls that set different modes; that
+ * may mean a library is initializing pcap in one mode and
+ * a program using that library, or another library used by
+ * that program, is initializing it in another mode.
+ */
+ switch (opts) {
+
+ case PCAP_CHAR_ENC_LOCAL:
+ /* Leave "UTF-8 mode" off. */
+ if (initialized) {
+ if (pcap_utf_8_mode) {
+ snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "Multiple pcap_init calls with different character encodings");
+ return (PCAP_ERROR);
+ }
+ }
+ break;
+
+ case PCAP_CHAR_ENC_UTF_8:
+ /* Turn on "UTF-8 mode". */
+ if (initialized) {
+ if (!pcap_utf_8_mode) {
+ snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "Multiple pcap_init calls with different character encodings");
+ return (PCAP_ERROR);
+ }
+ }
+ pcap_utf_8_mode = 1;
+ break;
+
+ default:
+ snprintf(errbuf, PCAP_ERRBUF_SIZE, "Unknown options specified");
+ return (PCAP_ERROR);
+ }
+
+ /*
+ * Turn the appropriate mode on for error messages; those routines
+ * are also used in rpcapd, which has no access to pcap's internal
+ * UTF-8 mode flag, so we have to call a routine to set its
+ * UTF-8 mode flag.
+ */
+ pcap_fmt_set_encoding(opts);
+
+ if (initialized) {
+ /*
+ * Nothing more to do; for example, on Windows, we've
+ * already initialized Winsock.
+ */
+ return (0);
+ }
+
+#ifdef _WIN32
+ /*
+ * Now set up Winsock.
+ */
+ if (internal_wsockinit(errbuf) == -1) {
+ /* Failed. */
+ return (PCAP_ERROR);
+ }
+#endif
+
+ /*
+ * We're done.
+ */
+ initialized = 1;
+ pcap_new_api = 1;
+ return (0);
+}
+
+/*
+ * String containing the library version.
+ * Not explicitly exported via a header file - the right API to use
+ * is pcap_lib_version() - but some programs included it, so we
+ * provide it.
+ *
+ * We declare it here, right before defining it, to squelch any
+ * warnings we might get from compilers about the lack of a
+ * declaration.
+ */
+PCAP_API char pcap_version[];
+PCAP_API_DEF char pcap_version[] = PACKAGE_VERSION;
+
+static void
+pcap_set_not_initialized_message(pcap_t *pcap)
{
+ if (pcap->activated) {
+ /* A module probably forgot to set the function pointer */
+ (void)snprintf(pcap->errbuf, sizeof(pcap->errbuf),
+ "This operation isn't properly handled by that device");
+ return;
+ }
/* in case the caller doesn't check for PCAP_ERROR_NOT_ACTIVATED */
- (void)pcap_snprintf(pcap->errbuf, sizeof(pcap->errbuf),
+ (void)snprintf(pcap->errbuf, sizeof(pcap->errbuf),
"This handle hasn't been activated yet");
+}
+
+static int
+pcap_read_not_initialized(pcap_t *pcap, int cnt _U_, pcap_handler callback _U_,
+ u_char *user _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ /* this means 'not initialized' */
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
+static int
+pcap_inject_not_initialized(pcap_t *pcap, const void * buf _U_, int size _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ /* this means 'not initialized' */
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
+static int
+pcap_setfilter_not_initialized(pcap_t *pcap, struct bpf_program *fp _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ /* this means 'not initialized' */
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
+static int
+pcap_setdirection_not_initialized(pcap_t *pcap, pcap_direction_t d _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ /* this means 'not initialized' */
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
+static int
+pcap_set_datalink_not_initialized(pcap_t *pcap, int dlt _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ /* this means 'not initialized' */
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
+static int
+pcap_getnonblock_not_initialized(pcap_t *pcap)
+{
+ pcap_set_not_initialized_message(pcap);
+ /* this means 'not initialized' */
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
+static int
+pcap_stats_not_initialized(pcap_t *pcap, struct pcap_stat *ps _U_)
+{
+ pcap_set_not_initialized_message(pcap);
/* this means 'not initialized' */
return (PCAP_ERROR_NOT_ACTIVATED);
}
#ifdef _WIN32
-static void *
-pcap_not_initialized_ptr(pcap_t *pcap)
+static struct pcap_stat *
+pcap_stats_ex_not_initialized(pcap_t *pcap, int *pcap_stat_size _U_)
{
- (void)pcap_snprintf(pcap->errbuf, sizeof(pcap->errbuf),
- "This handle hasn't been activated yet");
+ pcap_set_not_initialized_message(pcap);
return (NULL);
}
+static int
+pcap_setbuff_not_initialized(pcap_t *pcap, int dim _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ /* this means 'not initialized' */
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
+static int
+pcap_setmode_not_initialized(pcap_t *pcap, int mode _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ /* this means 'not initialized' */
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
+static int
+pcap_setmintocopy_not_initialized(pcap_t *pcap, int size _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ /* this means 'not initialized' */
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
static HANDLE
pcap_getevent_not_initialized(pcap_t *pcap)
{
- (void)pcap_snprintf(pcap->errbuf, sizeof(pcap->errbuf),
- "This handle hasn't been activated yet");
+ pcap_set_not_initialized_message(pcap);
return (INVALID_HANDLE_VALUE);
}
+static int
+pcap_oid_get_request_not_initialized(pcap_t *pcap, bpf_u_int32 oid _U_,
+ void *data _U_, size_t *lenp _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
+static int
+pcap_oid_set_request_not_initialized(pcap_t *pcap, bpf_u_int32 oid _U_,
+ const void *data _U_, size_t *lenp _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
static u_int
-pcap_sendqueue_transmit_not_initialized(pcap_t *pcap, pcap_send_queue* queue, int sync)
+pcap_sendqueue_transmit_not_initialized(pcap_t *pcap, pcap_send_queue* queue _U_,
+ int sync _U_)
{
- (void)pcap_snprintf(pcap->errbuf, sizeof(pcap->errbuf),
- "This handle hasn't been activated yet");
+ pcap_set_not_initialized_message(pcap);
return (0);
}
+static int
+pcap_setuserbuffer_not_initialized(pcap_t *pcap, int size _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
+static int
+pcap_live_dump_not_initialized(pcap_t *pcap, char *filename _U_, int maxsize _U_,
+ int maxpacks _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
+static int
+pcap_live_dump_ended_not_initialized(pcap_t *pcap, int sync _U_)
+{
+ pcap_set_not_initialized_message(pcap);
+ return (PCAP_ERROR_NOT_ACTIVATED);
+}
+
static PAirpcapHandle
pcap_get_airpcap_handle_not_initialized(pcap_t *pcap)
{
- (void)pcap_snprintf(pcap->errbuf, sizeof(pcap->errbuf),
- "This handle hasn't been activated yet");
+ pcap_set_not_initialized_message(pcap);
return (NULL);
}
#endif
if (p->tstamp_type_count == 0) {
/*
* We don't support multiple time stamp types.
+ * That means the only type we support is PCAP_TSTAMP_HOST;
+ * set up a list containing only that type.
*/
- *tstamp_typesp = NULL;
+ *tstamp_typesp = (int*)malloc(sizeof(**tstamp_typesp));
+ if (*tstamp_typesp == NULL) {
+ pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
+ errno, "malloc");
+ return (PCAP_ERROR);
+ }
+ **tstamp_typesp = PCAP_TSTAMP_HOST;
+ return (1);
} else {
*tstamp_typesp = (int*)calloc(sizeof(**tstamp_typesp),
p->tstamp_type_count);
if (*tstamp_typesp == NULL) {
- (void)pcap_snprintf(p->errbuf, sizeof(p->errbuf),
- "malloc: %s", pcap_strerror(errno));
+ pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
+ errno, "malloc");
return (PCAP_ERROR);
}
(void)memcpy(*tstamp_typesp, p->tstamp_type_list,
sizeof(**tstamp_typesp) * p->tstamp_type_count);
+ return (p->tstamp_type_count);
}
- return (p->tstamp_type_count);
}
/*
* Return codes for pcap_offline_read() are:
* - 0: EOF
* - -1: error
- * - >1: OK
+ * - >0: OK - result is number of packets read, so
+ * it will be 1 in this case, as we've passed
+ * a maximum packet count of 1
* The first one ('0') conflicts with the return code of
* 0 from pcap_read() meaning "no packets arrived before
* the timeout expired", so we map it to -2 so you can
* - 0: timeout
* - -1: error
* - -2: loop was broken out of with pcap_breakloop()
- * - >1: OK
+ * - >0: OK, result is number of packets captured, so
+ * it will be 1 in this case, as we've passed
+ * a maximum packet count of 1
* The first one ('0') conflicts with the return code of 0 from
* pcap_offline_read() meaning "end of file".
*/
return (p->read_op(p, 1, p->oneshot_callback, (u_char *)&s));
}
-struct capture_source_type {
- int (*findalldevs_op)(pcap_if_t **, char *);
+/*
+ * Implementation of a pcap_if_list_t.
+ */
+struct pcap_if_list {
+ pcap_if_t *beginning;
+};
+
+static struct capture_source_type {
+ int (*findalldevs_op)(pcap_if_list_t *, char *);
pcap_t *(*create_op)(const char *, char *, int *);
} capture_source_types[] = {
#ifdef HAVE_DAG_API
#ifdef PCAP_SUPPORT_BT_MONITOR
{ bt_monitor_findalldevs, bt_monitor_create },
#endif
-#ifdef PCAP_SUPPORT_USB
+#ifdef PCAP_SUPPORT_LINUX_USBMON
{ usb_findalldevs, usb_create },
#endif
#ifdef PCAP_SUPPORT_NETFILTER
{ netfilter_findalldevs, netfilter_create },
#endif
+#ifdef PCAP_SUPPORT_NETMAP
+ { pcap_netmap_findalldevs, pcap_netmap_create },
+#endif
#ifdef PCAP_SUPPORT_DBUS
{ dbus_findalldevs, dbus_create },
+#endif
+#ifdef PCAP_SUPPORT_RDMASNIFF
+ { rdmasniff_findalldevs, rdmasniff_create },
+#endif
+#ifdef PCAP_SUPPORT_DPDK
+ { pcap_dpdk_findalldevs, pcap_dpdk_create },
+#endif
+#ifdef HAVE_AIRPCAP_API
+ { airpcap_findalldevs, airpcap_create },
#endif
{ NULL, NULL }
};
pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
{
size_t i;
+ pcap_if_list_t devlist;
/*
* Find all the local network interfaces on which we
* can capture.
*/
- if (pcap_platform_finddevs(alldevsp, errbuf) == -1)
+ devlist.beginning = NULL;
+ if (pcap_platform_finddevs(&devlist, errbuf) == -1) {
+ /*
+ * Failed - free all of the entries we were given
+ * before we failed.
+ */
+ if (devlist.beginning != NULL)
+ pcap_freealldevs(devlist.beginning);
+ *alldevsp = NULL;
return (-1);
+ }
/*
* Ask each of the non-local-network-interface capture
* source types what interfaces they have.
*/
for (i = 0; capture_source_types[i].findalldevs_op != NULL; i++) {
- if (capture_source_types[i].findalldevs_op(alldevsp, errbuf) == -1) {
+ if (capture_source_types[i].findalldevs_op(&devlist, errbuf) == -1) {
/*
* We had an error; free the list we've been
* constructing.
*/
- if (*alldevsp != NULL) {
- pcap_freealldevs(*alldevsp);
- *alldevsp = NULL;
- }
+ if (devlist.beginning != NULL)
+ pcap_freealldevs(devlist.beginning);
+ *alldevsp = NULL;
return (-1);
}
}
+ /*
+ * Return the first entry of the list of all devices.
+ */
+ *alldevsp = devlist.beginning;
return (0);
}
-pcap_t *
-pcap_create(const char *device, char *errbuf)
+static struct sockaddr *
+dup_sockaddr(struct sockaddr *sa, size_t sa_length)
{
- size_t i;
- int is_theirs;
- pcap_t *p;
- char *device_str;
+ struct sockaddr *newsa;
+
+ if ((newsa = malloc(sa_length)) == NULL)
+ return (NULL);
+ return (memcpy(newsa, sa, sa_length));
+}
+
+/*
+ * Construct a "figure of merit" for an interface, for use when sorting
+ * the list of interfaces, in which interfaces that are up are superior
+ * to interfaces that aren't up, interfaces that are up and running are
+ * superior to interfaces that are up but not running, and non-loopback
+ * interfaces that are up and running are superior to loopback interfaces,
+ * and interfaces with the same flags have a figure of merit that's higher
+ * the lower the instance number.
+ *
+ * The goal is to try to put the interfaces most likely to be useful for
+ * capture at the beginning of the list.
+ *
+ * The figure of merit, which is lower the "better" the interface is,
+ * has the uppermost bit set if the interface isn't running, the bit
+ * below that set if the interface isn't up, the bit below that
+ * set if the interface is a loopback interface, and the bit below
+ * that set if it's the "any" interface.
+ *
+ * Note: we don't sort by unit number because 1) not all interfaces have
+ * a unit number (systemd, for example, might assign interface names
+ * based on the interface's MAC address or on the physical location of
+ * the adapter's connector), and 2) if the name does end with a simple
+ * unit number, it's not a global property of the interface, it's only
+ * useful as a sort key for device names with the same prefix, so xyz0
+ * shouldn't necessarily sort before abc2. This means that interfaces
+ * with the same figure of merit will be sorted by the order in which
+ * the mechanism from which we're getting the interfaces supplies them.
+ */
+static u_int
+get_figure_of_merit(pcap_if_t *dev)
+{
+ u_int n;
+
+ n = 0;
+ if (!(dev->flags & PCAP_IF_RUNNING))
+ n |= 0x80000000;
+ if (!(dev->flags & PCAP_IF_UP))
+ n |= 0x40000000;
/*
- * A null device name is equivalent to the "any" device -
- * which might not be supported on this platform, but
- * this means that you'll get a "not supported" error
- * rather than, say, a crash when we try to dereference
- * the null pointer.
+ * Give non-wireless interfaces that aren't disconnected a better
+ * figure of merit than interfaces that are disconnected, as
+ * "disconnected" should indicate that the interface isn't
+ * plugged into a network and thus won't give you any traffic.
+ *
+ * For wireless interfaces, it means "associated with a network",
+ * which we presume not to necessarily prevent capture, as you
+ * might run the adapter in some flavor of monitor mode.
*/
- if (device == NULL)
- device_str = strdup("any");
- else {
-#ifdef _WIN32
- /*
- * If the string appears to be little-endian UCS-2/UTF-16,
- * convert it to ASCII.
- *
- * XXX - to UTF-8 instead? Or report an error if any
- * character isn't ASCII?
- */
- if (device[0] != '\0' && device[1] == '\0') {
- size_t length;
-
- length = wcslen((wchar_t *)device);
- device_str = (char *)malloc(length + 1);
- if (device_str == NULL) {
- pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- return (NULL);
- }
+ if (!(dev->flags & PCAP_IF_WIRELESS) &&
+ (dev->flags & PCAP_IF_CONNECTION_STATUS) == PCAP_IF_CONNECTION_STATUS_DISCONNECTED)
+ n |= 0x20000000;
- pcap_snprintf(device_str, length + 1, "%ws",
- (const wchar_t *)device);
- } else
-#endif
- device_str = strdup(device);
- }
- if (device_str == NULL) {
- pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- return (NULL);
- }
+ /*
+ * Sort loopback devices after non-loopback devices, *except* for
+ * disconnected devices.
+ */
+ if (dev->flags & PCAP_IF_LOOPBACK)
+ n |= 0x10000000;
/*
- * Try each of the non-local-network-interface capture
- * source types until we find one that works for this
- * device or run out of types.
+ * Sort the "any" device before loopback and disconnected devices,
+ * but after all other devices.
*/
- for (i = 0; capture_source_types[i].create_op != NULL; i++) {
- is_theirs = 0;
- p = capture_source_types[i].create_op(device_str, errbuf,
- &is_theirs);
- if (is_theirs) {
- /*
- * The device name refers to a device of the
- * type in question; either it succeeded,
- * in which case p refers to a pcap_t to
- * later activate for the device, or it
- * failed, in which case p is null and we
- * should return that to report the failure
- * to create.
- */
- if (p == NULL) {
+ if (strcmp(dev->name, "any") == 0)
+ n |= 0x08000000;
+
+ return (n);
+}
+
+#ifndef _WIN32
+/*
+ * Try to get a description for a given device.
+ * Returns a mallocated description if it could and NULL if it couldn't.
+ *
+ * XXX - on FreeBSDs that support it, should it get the sysctl named
+ * "dev.{adapter family name}.{adapter unit}.%desc" to get a description
+ * of the adapter? Note that "dev.an.0.%desc" is "Aironet PC4500/PC4800"
+ * with my Cisco 350 card, so the name isn't entirely descriptive. The
+ * "dev.an.0.%pnpinfo" has a better description, although one might argue
+ * that the problem is really a driver bug - if it can find out that it's
+ * a Cisco 340 or 350, rather than an old Aironet card, it should use
+ * that in the description.
+ *
+ * Do NetBSD, DragonflyBSD, or OpenBSD support this as well? FreeBSD
+ * and OpenBSD let you get a description, but it's not generated by the OS,
+ * it's set with another ioctl that ifconfig supports; we use that to get
+ * a description in FreeBSD and OpenBSD, but if there is no such
+ * description available, it still might be nice to get some description
+ * string based on the device type or something such as that.
+ *
+ * In macOS, the System Configuration framework can apparently return
+ * names in 10.4 and later.
+ *
+ * It also appears that freedesktop.org's HAL offers an "info.product"
+ * string, but the HAL specification says it "should not be used in any
+ * UI" and "subsystem/capability specific properties" should be used
+ * instead and, in any case, I think HAL is being deprecated in
+ * favor of other stuff such as DeviceKit. DeviceKit doesn't appear
+ * to have any obvious product information for devices, but maybe
+ * I haven't looked hard enough.
+ *
+ * Using the System Configuration framework, or HAL, or DeviceKit, or
+ * whatever, would require that libpcap applications be linked with
+ * the frameworks/libraries in question. That shouldn't be a problem
+ * for programs linking with the shared version of libpcap (unless
+ * you're running on AIX - which I think is the only UN*X that doesn't
+ * support linking a shared library with other libraries on which it
+ * depends, and having an executable linked only with the first shared
+ * library automatically pick up the other libraries when started -
+ * and using HAL or whatever). Programs linked with the static
+ * version of libpcap would have to use pcap-config with the --static
+ * flag in order to get the right linker flags in order to pick up
+ * the additional libraries/frameworks; those programs need that anyway
+ * for libpcap 1.1 and beyond on Linux, as, by default, it requires
+ * -lnl.
+ *
+ * Do any other UN*Xes, or desktop environments support getting a
+ * description?
+ */
+static char *
+#ifdef SIOCGIFDESCR
+get_if_description(const char *name)
+{
+ char *description = NULL;
+ int s;
+ struct ifreq ifrdesc;
+#ifndef IFDESCRSIZE
+ size_t descrlen = 64;
+#else
+ size_t descrlen = IFDESCRSIZE;
+#endif /* IFDESCRSIZE */
+
+ /*
+ * Get the description for the interface.
+ */
+ memset(&ifrdesc, 0, sizeof ifrdesc);
+ pcap_strlcpy(ifrdesc.ifr_name, name, sizeof ifrdesc.ifr_name);
+ s = socket(AF_INET, SOCK_DGRAM, 0);
+ if (s >= 0) {
+#ifdef __FreeBSD__
+ /*
+ * On FreeBSD, if the buffer isn't big enough for the
+ * description, the ioctl succeeds, but the description
+ * isn't copied, ifr_buffer.length is set to the description
+ * length, and ifr_buffer.buffer is set to NULL.
+ */
+ for (;;) {
+ free(description);
+ if ((description = malloc(descrlen)) != NULL) {
+ ifrdesc.ifr_buffer.buffer = description;
+ ifrdesc.ifr_buffer.length = descrlen;
+ if (ioctl(s, SIOCGIFDESCR, &ifrdesc) == 0) {
+ if (ifrdesc.ifr_buffer.buffer ==
+ description)
+ break;
+ else
+ descrlen = ifrdesc.ifr_buffer.length;
+ } else {
+ /*
+ * Failed to get interface description.
+ */
+ free(description);
+ description = NULL;
+ break;
+ }
+ } else
+ break;
+ }
+#else /* __FreeBSD__ */
+ /*
+ * The only other OS that currently supports
+ * SIOCGIFDESCR is OpenBSD, and it has no way
+ * to get the description length - it's clamped
+ * to a maximum of IFDESCRSIZE.
+ */
+ if ((description = malloc(descrlen)) != NULL) {
+ ifrdesc.ifr_data = (caddr_t)description;
+ if (ioctl(s, SIOCGIFDESCR, &ifrdesc) != 0) {
/*
- * We assume the caller filled in errbuf.
+ * Failed to get interface description.
*/
- free(device_str);
- return (NULL);
+ free(description);
+ description = NULL;
}
- p->opt.device = device_str;
- return (p);
+ }
+#endif /* __FreeBSD__ */
+ close(s);
+ if (description != NULL && description[0] == '\0') {
+ /*
+ * Description is empty, so discard it.
+ */
+ free(description);
+ description = NULL;
}
}
+#ifdef __FreeBSD__
/*
- * OK, try it as a regular network interface.
+ * For FreeBSD, if we didn't get a description, and this is
+ * a device with a name of the form usbusN, label it as a USB
+ * bus.
*/
- p = pcap_create_interface(device_str, errbuf);
- if (p == NULL) {
- /*
- * We assume the caller filled in errbuf.
- */
- free(device_str);
- return (NULL);
+ if (description == NULL) {
+ if (strncmp(name, "usbus", 5) == 0) {
+ /*
+ * OK, it begins with "usbus".
+ */
+ long busnum;
+ char *p;
+
+ errno = 0;
+ busnum = strtol(name + 5, &p, 10);
+ if (errno == 0 && p != name + 5 && *p == '\0' &&
+ busnum >= 0 && busnum <= INT_MAX) {
+ /*
+ * OK, it's a valid number that's not
+ * bigger than INT_MAX. Construct
+ * a description from it.
+ * (If that fails, we don't worry about
+ * it, we just return NULL.)
+ */
+ if (pcap_asprintf(&description,
+ "USB bus number %ld", busnum) == -1) {
+ /* Failed. */
+ description = NULL;
+ }
+ }
+ }
}
- p->opt.device = device_str;
- return (p);
+#endif
+ return (description);
+#else /* SIOCGIFDESCR */
+get_if_description(const char *name _U_)
+{
+ return (NULL);
+#endif /* SIOCGIFDESCR */
}
-static void
-initialize_ops(pcap_t *p)
+/*
+ * Look for a given device in the specified list of devices.
+ *
+ * If we find it, return a pointer to its entry.
+ *
+ * If we don't find it, attempt to add an entry for it, with the specified
+ * IFF_ flags and description, and, if that succeeds, return a pointer to
+ * the new entry, otherwise return NULL and set errbuf to an error message.
+ */
+pcap_if_t *
+find_or_add_if(pcap_if_list_t *devlistp, const char *name,
+ bpf_u_int32 if_flags, get_if_flags_func get_flags_func, char *errbuf)
{
+ bpf_u_int32 pcap_flags;
+
/*
- * Set operation pointers for operations that only work on
- * an activated pcap_t to point to a routine that returns
- * a "this isn't activated" error.
+ * Convert IFF_ flags to pcap flags.
*/
- p->read_op = (read_op_t)pcap_not_initialized;
- p->inject_op = (inject_op_t)pcap_not_initialized;
- p->setfilter_op = (setfilter_op_t)pcap_not_initialized;
- p->setdirection_op = (setdirection_op_t)pcap_not_initialized;
- p->set_datalink_op = (set_datalink_op_t)pcap_not_initialized;
- p->getnonblock_op = (getnonblock_op_t)pcap_not_initialized;
- p->setnonblock_op = (setnonblock_op_t)pcap_not_initialized;
- p->stats_op = (stats_op_t)pcap_not_initialized;
-#ifdef _WIN32
- p->stats_ex_op = (stats_ex_op_t)pcap_not_initialized_ptr;
- p->setbuff_op = (setbuff_op_t)pcap_not_initialized;
- p->setmode_op = (setmode_op_t)pcap_not_initialized;
- p->setmintocopy_op = (setmintocopy_op_t)pcap_not_initialized;
- p->getevent_op = pcap_getevent_not_initialized;
- p->oid_get_request_op = (oid_get_request_op_t)pcap_not_initialized;
- p->oid_set_request_op = (oid_set_request_op_t)pcap_not_initialized;
- p->sendqueue_transmit_op = pcap_sendqueue_transmit_not_initialized;
- p->setuserbuffer_op = (setuserbuffer_op_t)pcap_not_initialized;
- p->live_dump_op = (live_dump_op_t)pcap_not_initialized;
- p->live_dump_ended_op = (live_dump_ended_op_t)pcap_not_initialized;
- p->get_airpcap_handle_op = pcap_get_airpcap_handle_not_initialized;
-#endif
-
+ pcap_flags = 0;
+#ifdef IFF_LOOPBACK
+ if (if_flags & IFF_LOOPBACK)
+ pcap_flags |= PCAP_IF_LOOPBACK;
+#else
/*
- * Default cleanup operation - implementations can override
- * this, but should call pcap_cleanup_live_common() after
- * doing their own additional cleanup.
+ * We don't have IFF_LOOPBACK, so look at the device name to
+ * see if it looks like a loopback device.
*/
- p->cleanup_op = pcap_cleanup_live_common;
+ if (name[0] == 'l' && name[1] == 'o' &&
+ (PCAP_ISDIGIT(name[2]) || name[2] == '\0'))
+ pcap_flags |= PCAP_IF_LOOPBACK;
+#endif
+#ifdef IFF_UP
+ if (if_flags & IFF_UP)
+ pcap_flags |= PCAP_IF_UP;
+#endif
+#ifdef IFF_RUNNING
+ if (if_flags & IFF_RUNNING)
+ pcap_flags |= PCAP_IF_RUNNING;
+#endif
/*
- * In most cases, the standard one-shot callback can
- * be used for pcap_next()/pcap_next_ex().
+ * Attempt to find an entry for this device; if we don't find one,
+ * attempt to add one.
*/
- p->oneshot_callback = pcap_oneshot;
+ return (find_or_add_dev(devlistp, name, pcap_flags,
+ get_flags_func, get_if_description(name), errbuf));
}
-static pcap_t *
-pcap_alloc_pcap_t(char *ebuf, size_t size)
+/*
+ * Look for a given device in the specified list of devices.
+ *
+ * If we find it, then, if the specified address isn't null, add it to
+ * the list of addresses for the device and return 0.
+ *
+ * If we don't find it, attempt to add an entry for it, with the specified
+ * IFF_ flags and description, and, if that succeeds, add the specified
+ * address to its list of addresses if that address is non-null, and
+ * return 0, otherwise return -1 and set errbuf to an error message.
+ *
+ * (We can get called with a null address because we might get a list
+ * of interface name/address combinations from the underlying OS, with
+ * the address being absent in some cases, rather than a list of
+ * interfaces with each interface having a list of addresses, so this
+ * call may be the only call made to add to the list, and we want to
+ * add interfaces even if they have no addresses.)
+ */
+int
+add_addr_to_if(pcap_if_list_t *devlistp, const char *name,
+ bpf_u_int32 if_flags, get_if_flags_func get_flags_func,
+ struct sockaddr *addr, size_t addr_size,
+ struct sockaddr *netmask, size_t netmask_size,
+ struct sockaddr *broadaddr, size_t broadaddr_size,
+ struct sockaddr *dstaddr, size_t dstaddr_size,
+ char *errbuf)
{
- char *chunk;
- pcap_t *p;
+ pcap_if_t *curdev;
/*
- * Allocate a chunk of memory big enough for a pcap_t
- * plus a structure following it of size "size". The
- * structure following it is a private data structure
- * for the routines that handle this pcap_t.
+ * Check whether the device exists and, if not, add it.
*/
- chunk = malloc(sizeof (pcap_t) + size);
- if (chunk == NULL) {
- pcap_snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc: %s",
- pcap_strerror(errno));
- return (NULL);
+ curdev = find_or_add_if(devlistp, name, if_flags, get_flags_func,
+ errbuf);
+ if (curdev == NULL) {
+ /*
+ * Error - give up.
+ */
+ return (-1);
}
- memset(chunk, 0, sizeof (pcap_t) + size);
-
- /*
- * Get a pointer to the pcap_t at the beginning.
- */
- p = (pcap_t *)chunk;
-
-#ifndef _WIN32
- p->fd = -1; /* not opened yet */
- p->selectable_fd = -1;
-#endif
- if (size == 0) {
- /* No private data was requested. */
- p->priv = NULL;
- } else {
+ if (addr == NULL) {
/*
- * Set the pointer to the private data; that's the structure
- * of size "size" following the pcap_t.
+ * There's no address to add; this entry just meant
+ * "here's a new interface".
*/
- p->priv = (void *)(chunk + sizeof (pcap_t));
+ return (0);
}
- return (p);
-}
-
-pcap_t *
-pcap_create_common(char *ebuf, size_t size)
-{
- pcap_t *p;
-
- p = pcap_alloc_pcap_t(ebuf, size);
- if (p == NULL)
- return (NULL);
-
- /*
- * Default to "can't set rfmon mode"; if it's supported by
- * a platform, the create routine that called us can set
- * the op to its routine to check whether a particular
- * device supports it.
- */
- p->can_set_rfmon_op = pcap_cant_set_rfmon;
-
- initialize_ops(p);
-
- /* put in some defaults*/
- p->snapshot = MAXIMUM_SNAPLEN; /* max packet size */
- p->opt.timeout = 0; /* no timeout specified */
- p->opt.buffer_size = 0; /* use the platform's default */
- p->opt.promisc = 0;
- p->opt.rfmon = 0;
- p->opt.immediate = 0;
- p->opt.tstamp_type = -1; /* default to not setting time stamp type */
- p->opt.tstamp_precision = PCAP_TSTAMP_PRECISION_MICRO;
-
/*
- * Start out with no BPF code generation flags set.
+ * "curdev" is an entry for this interface, and we have an
+ * address for it; add an entry for that address to the
+ * interface's list of addresses.
*/
- p->bpf_codegen_flags = 0;
-
- return (p);
+ return (add_addr_to_dev(curdev, addr, addr_size, netmask,
+ netmask_size, broadaddr, broadaddr_size, dstaddr,
+ dstaddr_size, errbuf));
}
+#endif /* _WIN32 */
+/*
+ * Add an entry to the list of addresses for an interface.
+ * "curdev" is the entry for that interface.
+ */
int
-pcap_check_activated(pcap_t *p)
+add_addr_to_dev(pcap_if_t *curdev,
+ struct sockaddr *addr, size_t addr_size,
+ struct sockaddr *netmask, size_t netmask_size,
+ struct sockaddr *broadaddr, size_t broadaddr_size,
+ struct sockaddr *dstaddr, size_t dstaddr_size,
+ char *errbuf)
{
- if (p->activated) {
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "can't perform "
- " operation on activated capture");
+ pcap_addr_t *curaddr, *prevaddr, *nextaddr;
+
+ /*
+ * Allocate the new entry and fill it in.
+ */
+ curaddr = (pcap_addr_t *)malloc(sizeof(pcap_addr_t));
+ if (curaddr == NULL) {
+ pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
return (-1);
}
- return (0);
-}
-int
-pcap_set_snaplen(pcap_t *p, int snaplen)
-{
- if (pcap_check_activated(p))
- return (PCAP_ERROR_ACTIVATED);
+ curaddr->next = NULL;
+ if (addr != NULL && addr_size != 0) {
+ curaddr->addr = (struct sockaddr *)dup_sockaddr(addr, addr_size);
+ if (curaddr->addr == NULL) {
+ pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ free(curaddr);
+ return (-1);
+ }
+ } else
+ curaddr->addr = NULL;
+
+ if (netmask != NULL && netmask_size != 0) {
+ curaddr->netmask = (struct sockaddr *)dup_sockaddr(netmask, netmask_size);
+ if (curaddr->netmask == NULL) {
+ pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ if (curaddr->addr != NULL)
+ free(curaddr->addr);
+ free(curaddr);
+ return (-1);
+ }
+ } else
+ curaddr->netmask = NULL;
+
+ if (broadaddr != NULL && broadaddr_size != 0) {
+ curaddr->broadaddr = (struct sockaddr *)dup_sockaddr(broadaddr, broadaddr_size);
+ if (curaddr->broadaddr == NULL) {
+ pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ if (curaddr->netmask != NULL)
+ free(curaddr->netmask);
+ if (curaddr->addr != NULL)
+ free(curaddr->addr);
+ free(curaddr);
+ return (-1);
+ }
+ } else
+ curaddr->broadaddr = NULL;
+
+ if (dstaddr != NULL && dstaddr_size != 0) {
+ curaddr->dstaddr = (struct sockaddr *)dup_sockaddr(dstaddr, dstaddr_size);
+ if (curaddr->dstaddr == NULL) {
+ pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ if (curaddr->broadaddr != NULL)
+ free(curaddr->broadaddr);
+ if (curaddr->netmask != NULL)
+ free(curaddr->netmask);
+ if (curaddr->addr != NULL)
+ free(curaddr->addr);
+ free(curaddr);
+ return (-1);
+ }
+ } else
+ curaddr->dstaddr = NULL;
/*
- * Turn invalid values, or excessively large values, into
- * the maximum allowed value.
- *
- * If some application really *needs* a bigger snapshot
- * length, we should just increase MAXIMUM_SNAPLEN.
+ * Find the end of the list of addresses.
*/
- if (snaplen <= 0 || snaplen > MAXIMUM_SNAPLEN)
- snaplen = MAXIMUM_SNAPLEN;
- p->snapshot = snaplen;
- return (0);
-}
-
-int
-pcap_set_promisc(pcap_t *p, int promisc)
-{
- if (pcap_check_activated(p))
- return (PCAP_ERROR_ACTIVATED);
- p->opt.promisc = promisc;
- return (0);
-}
+ for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) {
+ nextaddr = prevaddr->next;
+ if (nextaddr == NULL) {
+ /*
+ * This is the end of the list.
+ */
+ break;
+ }
+ }
-int
-pcap_set_rfmon(pcap_t *p, int rfmon)
-{
- if (pcap_check_activated(p))
- return (PCAP_ERROR_ACTIVATED);
- p->opt.rfmon = rfmon;
- return (0);
-}
+ if (prevaddr == NULL) {
+ /*
+ * The list was empty; this is the first member.
+ */
+ curdev->addresses = curaddr;
+ } else {
+ /*
+ * "prevaddr" is the last member of the list; append
+ * this member to it.
+ */
+ prevaddr->next = curaddr;
+ }
-int
-pcap_set_timeout(pcap_t *p, int timeout_ms)
-{
- if (pcap_check_activated(p))
- return (PCAP_ERROR_ACTIVATED);
- p->opt.timeout = timeout_ms;
return (0);
}
-int
-pcap_set_tstamp_type(pcap_t *p, int tstamp_type)
+/*
+ * Look for a given device in the specified list of devices.
+ *
+ * If we find it, return 0 and set *curdev_ret to point to it.
+ *
+ * If we don't find it, attempt to add an entry for it, with the specified
+ * flags and description, and, if that succeeds, return 0, otherwise
+ * return -1 and set errbuf to an error message.
+ */
+pcap_if_t *
+find_or_add_dev(pcap_if_list_t *devlistp, const char *name, bpf_u_int32 flags,
+ get_if_flags_func get_flags_func, const char *description, char *errbuf)
{
- int i;
+ pcap_if_t *curdev;
- if (pcap_check_activated(p))
- return (PCAP_ERROR_ACTIVATED);
+ /*
+ * Is there already an entry in the list for this device?
+ */
+ curdev = find_dev(devlistp, name);
+ if (curdev != NULL) {
+ /*
+ * Yes, return it.
+ */
+ return (curdev);
+ }
/*
- * The argument should have been u_int, but that's too late
- * to change now - it's an API.
+ * No, we didn't find it.
*/
- if (tstamp_type < 0)
- return (PCAP_WARNING_TSTAMP_TYPE_NOTSUP);
/*
- * If p->tstamp_type_count is 0, we only support PCAP_TSTAMP_HOST;
- * the default time stamp type is PCAP_TSTAMP_HOST.
+ * Try to get additional flags for the device.
*/
- if (p->tstamp_type_count == 0) {
- if (tstamp_type == PCAP_TSTAMP_HOST) {
- p->opt.tstamp_type = tstamp_type;
- return (0);
- }
- } else {
+ if ((*get_flags_func)(name, &flags, errbuf) == -1) {
/*
- * Check whether we claim to support this type of time stamp.
+ * Failed.
*/
- for (i = 0; i < p->tstamp_type_count; i++) {
- if (p->tstamp_type_list[i] == (u_int)tstamp_type) {
- /*
- * Yes.
- */
- p->opt.tstamp_type = tstamp_type;
- return (0);
- }
- }
+ return (NULL);
}
/*
- * We don't support this type of time stamp.
+ * Now, try to add it to the list of devices.
*/
- return (PCAP_WARNING_TSTAMP_TYPE_NOTSUP);
+ return (add_dev(devlistp, name, flags, description, errbuf));
}
-int
-pcap_set_immediate_mode(pcap_t *p, int immediate)
+/*
+ * Look for a given device in the specified list of devices, and return
+ * the entry for it if we find it or NULL if we don't.
+ */
+pcap_if_t *
+find_dev(pcap_if_list_t *devlistp, const char *name)
{
- if (pcap_check_activated(p))
- return (PCAP_ERROR_ACTIVATED);
- p->opt.immediate = immediate;
- return (0);
-}
+ pcap_if_t *curdev;
-int
-pcap_set_buffer_size(pcap_t *p, int buffer_size)
-{
- if (pcap_check_activated(p))
- return (PCAP_ERROR_ACTIVATED);
- if (buffer_size <= 0) {
- /*
- * Silently ignore invalid values.
- */
- return (0);
+ /*
+ * Is there an entry in the list for this device?
+ */
+ for (curdev = devlistp->beginning; curdev != NULL;
+ curdev = curdev->next) {
+ if (strcmp(name, curdev->name) == 0) {
+ /*
+ * We found it, so, yes, there is. No need to
+ * add it. Provide the entry we found to our
+ * caller.
+ */
+ return (curdev);
+ }
}
- p->opt.buffer_size = buffer_size;
- return (0);
+
+ /*
+ * No.
+ */
+ return (NULL);
}
-int
-pcap_set_tstamp_precision(pcap_t *p, int tstamp_precision)
+/*
+ * Attempt to add an entry for a device, with the specified flags
+ * and description, and, if that succeeds, return 0 and return a pointer
+ * to the new entry, otherwise return NULL and set errbuf to an error
+ * message.
+ *
+ * If we weren't given a description, try to get one.
+ */
+pcap_if_t *
+add_dev(pcap_if_list_t *devlistp, const char *name, bpf_u_int32 flags,
+ const char *description, char *errbuf)
{
- int i;
-
- if (pcap_check_activated(p))
- return (PCAP_ERROR_ACTIVATED);
+ pcap_if_t *curdev, *prevdev, *nextdev;
+ u_int this_figure_of_merit, nextdev_figure_of_merit;
- /*
- * The argument should have been u_int, but that's too late
- * to change now - it's an API.
- */
- if (tstamp_precision < 0)
- return (PCAP_ERROR_TSTAMP_PRECISION_NOTSUP);
+ curdev = malloc(sizeof(pcap_if_t));
+ if (curdev == NULL) {
+ pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ return (NULL);
+ }
/*
- * If p->tstamp_precision_count is 0, we only support setting
- * the time stamp precision to microsecond precision; every
- * pcap module *MUST* support microsecond precision, even if
- * it does so by converting the native precision to
- * microseconds.
+ * Fill in the entry.
*/
- if (p->tstamp_precision_count == 0) {
- if (tstamp_precision == PCAP_TSTAMP_PRECISION_MICRO) {
- p->opt.tstamp_precision = tstamp_precision;
- return (0);
- }
+ curdev->next = NULL;
+ curdev->name = strdup(name);
+ if (curdev->name == NULL) {
+ pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ free(curdev);
+ return (NULL);
+ }
+ if (description == NULL) {
+ /*
+ * We weren't handed a description for the interface.
+ */
+ curdev->description = NULL;
} else {
/*
- * Check whether we claim to support this precision of
- * time stamp.
+ * We were handed a description; make a copy.
*/
- for (i = 0; i < p->tstamp_precision_count; i++) {
- if (p->tstamp_precision_list[i] == (u_int)tstamp_precision) {
- /*
- * Yes.
- */
- p->opt.tstamp_precision = tstamp_precision;
- return (0);
- }
+ curdev->description = strdup(description);
+ if (curdev->description == NULL) {
+ pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ free(curdev->name);
+ free(curdev);
+ return (NULL);
}
}
+ curdev->addresses = NULL; /* list starts out as empty */
+ curdev->flags = flags;
/*
- * We don't support this time stamp precision.
+ * Add it to the list, in the appropriate location.
+ * First, get the "figure of merit" for this interface.
*/
- return (PCAP_ERROR_TSTAMP_PRECISION_NOTSUP);
-}
-
-int
-pcap_get_tstamp_precision(pcap_t *p)
-{
- return (p->opt.tstamp_precision);
-}
-
-int
-pcap_activate(pcap_t *p)
-{
- int status;
+ this_figure_of_merit = get_figure_of_merit(curdev);
/*
- * Catch attempts to re-activate an already-activated
- * pcap_t; this should, for example, catch code that
- * calls pcap_open_live() followed by pcap_activate(),
- * as some code that showed up in a Stack Exchange
- * question did.
+ * Now look for the last interface with an figure of merit
+ * less than or equal to the new interface's figure of merit.
+ *
+ * We start with "prevdev" being NULL, meaning we're before
+ * the first element in the list.
*/
- if (pcap_check_activated(p))
- return (PCAP_ERROR_ACTIVATED);
- status = p->activate_op(p);
- if (status >= 0)
- p->activated = 1;
- else {
- if (p->errbuf[0] == '\0') {
+ prevdev = NULL;
+ for (;;) {
+ /*
+ * Get the interface after this one.
+ */
+ if (prevdev == NULL) {
/*
- * No error message supplied by the activate routine;
- * for the benefit of programs that don't specially
- * handle errors other than PCAP_ERROR, return the
- * error message corresponding to the status.
+ * The next element is the first element.
*/
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "%s",
- pcap_statustostr(status));
+ nextdev = devlistp->beginning;
+ } else
+ nextdev = prevdev->next;
+
+ /*
+ * Are we at the end of the list?
+ */
+ if (nextdev == NULL) {
+ /*
+ * Yes - we have to put the new entry after "prevdev".
+ */
+ break;
}
/*
- * Undo any operation pointer setting, etc. done by
- * the activate operation.
+ * Is the new interface's figure of merit less
+ * than the next interface's figure of merit,
+ * meaning that the new interface is better
+ * than the next interface?
*/
- initialize_ops(p);
+ nextdev_figure_of_merit = get_figure_of_merit(nextdev);
+ if (this_figure_of_merit < nextdev_figure_of_merit) {
+ /*
+ * Yes - we should put the new entry
+ * before "nextdev", i.e. after "prevdev".
+ */
+ break;
+ }
+
+ prevdev = nextdev;
}
- return (status);
-}
-pcap_t *
-pcap_open_live(const char *device, int snaplen, int promisc, int to_ms, char *errbuf)
-{
- pcap_t *p;
- int status;
+ /*
+ * Insert before "nextdev".
+ */
+ curdev->next = nextdev;
- p = pcap_create(device, errbuf);
- if (p == NULL)
- return (NULL);
- status = pcap_set_snaplen(p, snaplen);
- if (status < 0)
- goto fail;
- status = pcap_set_promisc(p, promisc);
- if (status < 0)
- goto fail;
- status = pcap_set_timeout(p, to_ms);
- if (status < 0)
- goto fail;
/*
- * Mark this as opened with pcap_open_live(), so that, for
- * example, we show the full list of DLT_ values, rather
- * than just the ones that are compatible with capturing
- * when not in monitor mode. That allows existing applications
- * to work the way they used to work, but allows new applications
- * that know about the new open API to, for example, find out the
- * DLT_ values that they can select without changing whether
- * the adapter is in monitor mode or not.
+ * Insert after "prevdev" - unless "prevdev" is null,
+ * in which case this is the first interface.
*/
- p->oldstyle = 1;
- status = pcap_activate(p);
- if (status < 0)
- goto fail;
- return (p);
-fail:
- if (status == PCAP_ERROR)
- pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s", device,
- p->errbuf);
- else if (status == PCAP_ERROR_NO_SUCH_DEVICE ||
- status == PCAP_ERROR_PERM_DENIED ||
- status == PCAP_ERROR_PROMISC_PERM_DENIED)
- pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s (%s)", device,
- pcap_statustostr(status), p->errbuf);
- else
- pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s", device,
- pcap_statustostr(status));
- pcap_close(p);
- return (NULL);
+ if (prevdev == NULL) {
+ /*
+ * This is the first interface. Make it
+ * the first element in the list of devices.
+ */
+ devlistp->beginning = curdev;
+ } else
+ prevdev->next = curdev;
+ return (curdev);
}
-pcap_t *
-pcap_open_offline_common(char *ebuf, size_t size)
+/*
+ * Free a list of interfaces.
+ */
+void
+pcap_freealldevs(pcap_if_t *alldevs)
{
- pcap_t *p;
-
- p = pcap_alloc_pcap_t(ebuf, size);
- if (p == NULL)
- return (NULL);
+ pcap_if_t *curdev, *nextdev;
+ pcap_addr_t *curaddr, *nextaddr;
- p->opt.tstamp_precision = PCAP_TSTAMP_PRECISION_MICRO;
+ for (curdev = alldevs; curdev != NULL; curdev = nextdev) {
+ nextdev = curdev->next;
- return (p);
-}
+ /*
+ * Free all addresses.
+ */
+ for (curaddr = curdev->addresses; curaddr != NULL; curaddr = nextaddr) {
+ nextaddr = curaddr->next;
+ if (curaddr->addr)
+ free(curaddr->addr);
+ if (curaddr->netmask)
+ free(curaddr->netmask);
+ if (curaddr->broadaddr)
+ free(curaddr->broadaddr);
+ if (curaddr->dstaddr)
+ free(curaddr->dstaddr);
+ free(curaddr);
+ }
-int
-pcap_dispatch(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
-{
- return (p->read_op(p, cnt, callback, user));
-}
+ /*
+ * Free the name string.
+ */
+ free(curdev->name);
-int
-pcap_loop(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
-{
- register int n;
+ /*
+ * Free the description string, if any.
+ */
+ if (curdev->description != NULL)
+ free(curdev->description);
- for (;;) {
- if (p->rfile != NULL) {
- /*
- * 0 means EOF, so don't loop if we get 0.
- */
- n = pcap_offline_read(p, cnt, callback, user);
- } else {
- /*
- * XXX keep reading until we get something
- * (or an error occurs)
- */
- do {
- n = p->read_op(p, cnt, callback, user);
- } while (n == 0);
- }
- if (n <= 0)
- return (n);
- if (!PACKET_COUNT_IS_UNLIMITED(cnt)) {
- cnt -= n;
- if (cnt <= 0)
- return (0);
- }
+ /*
+ * Free the interface.
+ */
+ free(curdev);
}
}
/*
- * Force the loop in "pcap_read()" or "pcap_read_offline()" to terminate.
+ * pcap-npf.c has its own pcap_lookupdev(), for compatibility reasons, as
+ * it actually returns the names of all interfaces, with a NUL separator
+ * between them; some callers may depend on that.
+ *
+ * MS-DOS has its own pcap_lookupdev(), but that might be useful only
+ * as an optimization.
+ *
+ * In all other cases, we just use pcap_findalldevs() to get a list of
+ * devices, and pick from that list.
*/
-void
-pcap_breakloop(pcap_t *p)
+#if !defined(HAVE_PACKET32) && !defined(MSDOS)
+/*
+ * Return the name of a network interface attached to the system, or NULL
+ * if none can be found. The interface must be configured up; the
+ * lowest unit number is preferred; loopback is ignored.
+ */
+char *
+pcap_lookupdev(char *errbuf)
{
- p->break_loop = 1;
-}
+ pcap_if_t *alldevs;
+#ifdef _WIN32
+ /*
+ * Windows - use the same size as the old WinPcap 3.1 code.
+ * XXX - this is probably bigger than it needs to be.
+ */
+ #define IF_NAMESIZE 8192
+#else
+ /*
+ * UN*X - use the system's interface name size.
+ * XXX - that might not be large enough for capture devices
+ * that aren't regular network interfaces.
+ */
+ /* for old BSD systems, including bsdi3 */
+ #ifndef IF_NAMESIZE
+ #define IF_NAMESIZE IFNAMSIZ
+ #endif
+#endif
+ static char device[IF_NAMESIZE + 1];
+ char *ret;
-int
-pcap_datalink(pcap_t *p)
-{
- if (!p->activated)
- return (PCAP_ERROR_NOT_ACTIVATED);
- return (p->linktype);
+ /*
+ * We disable this in "new API" mode, because 1) in WinPcap/Npcap,
+ * it may return UTF-16 strings, for backwards-compatibility
+ * reasons, and we're also disabling the hack to make that work,
+ * for not-going-past-the-end-of-a-string reasons, and 2) we
+ * want its behavior to be consistent.
+ *
+ * In addition, it's not thread-safe, so we've marked it as
+ * deprecated.
+ */
+ if (pcap_new_api) {
+ snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "pcap_lookupdev() is deprecated and is not supported in programs calling pcap_init()");
+ return (NULL);
+ }
+
+ if (pcap_findalldevs(&alldevs, errbuf) == -1)
+ return (NULL);
+
+ if (alldevs == NULL || (alldevs->flags & PCAP_IF_LOOPBACK)) {
+ /*
+ * There are no devices on the list, or the first device
+ * on the list is a loopback device, which means there
+ * are no non-loopback devices on the list. This means
+ * we can't return any device.
+ *
+ * XXX - why not return a loopback device? If we can't
+ * capture on it, it won't be on the list, and if it's
+ * on the list, there aren't any non-loopback devices,
+ * so why not just supply it as the default device?
+ */
+ (void)pcap_strlcpy(errbuf, "no suitable device found",
+ PCAP_ERRBUF_SIZE);
+ ret = NULL;
+ } else {
+ /*
+ * Return the name of the first device on the list.
+ */
+ (void)pcap_strlcpy(device, alldevs->name, sizeof(device));
+ ret = device;
+ }
+
+ pcap_freealldevs(alldevs);
+ return (ret);
}
+#endif /* !defined(HAVE_PACKET32) && !defined(MSDOS) */
+#if !defined(_WIN32) && !defined(MSDOS)
+/*
+ * We don't just fetch the entire list of devices, search for the
+ * particular device, and use its first IPv4 address, as that's too
+ * much work to get just one device's netmask.
+ *
+ * If we had an API to get attributes for a given device, we could
+ * use that.
+ */
int
-pcap_datalink_ext(pcap_t *p)
+pcap_lookupnet(const char *device, bpf_u_int32 *netp, bpf_u_int32 *maskp,
+ char *errbuf)
{
- if (!p->activated)
- return (PCAP_ERROR_NOT_ACTIVATED);
+ register int fd;
+ register struct sockaddr_in *sin4;
+ struct ifreq ifr;
+
+ /*
+ * The pseudo-device "any" listens on all interfaces and therefore
+ * has the network address and -mask "0.0.0.0" therefore catching
+ * all traffic. Using NULL for the interface is the same as "any".
+ */
+ if (!device || strcmp(device, "any") == 0
+#ifdef HAVE_DAG_API
+ || strstr(device, "dag") != NULL
+#endif
+#ifdef HAVE_SEPTEL_API
+ || strstr(device, "septel") != NULL
+#endif
+#ifdef PCAP_SUPPORT_BT
+ || strstr(device, "bluetooth") != NULL
+#endif
+#ifdef PCAP_SUPPORT_LINUX_USBMON
+ || strstr(device, "usbmon") != NULL
+#endif
+#ifdef HAVE_SNF_API
+ || strstr(device, "snf") != NULL
+#endif
+#ifdef PCAP_SUPPORT_NETMAP
+ || strncmp(device, "netmap:", 7) == 0
+ || strncmp(device, "vale", 4) == 0
+#endif
+#ifdef PCAP_SUPPORT_DPDK
+ || strncmp(device, "dpdk:", 5) == 0
+#endif
+ ) {
+ *netp = *maskp = 0;
+ return 0;
+ }
+
+ fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ errno, "socket");
+ return (-1);
+ }
+ memset(&ifr, 0, sizeof(ifr));
+#ifdef linux
+ /* XXX Work around Linux kernel bug */
+ ifr.ifr_addr.sa_family = AF_INET;
+#endif
+ (void)pcap_strlcpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
+ if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) {
+ if (errno == EADDRNOTAVAIL) {
+ (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "%s: no IPv4 address assigned", device);
+ } else {
+ pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ errno, "SIOCGIFADDR: %s", device);
+ }
+ (void)close(fd);
+ return (-1);
+ }
+ sin4 = (struct sockaddr_in *)&ifr.ifr_addr;
+ *netp = sin4->sin_addr.s_addr;
+ memset(&ifr, 0, sizeof(ifr));
+#ifdef linux
+ /* XXX Work around Linux kernel bug */
+ ifr.ifr_addr.sa_family = AF_INET;
+#endif
+ (void)pcap_strlcpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
+ if (ioctl(fd, SIOCGIFNETMASK, (char *)&ifr) < 0) {
+ pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ errno, "SIOCGIFNETMASK: %s", device);
+ (void)close(fd);
+ return (-1);
+ }
+ (void)close(fd);
+ *maskp = sin4->sin_addr.s_addr;
+ if (*maskp == 0) {
+ if (IN_CLASSA(*netp))
+ *maskp = IN_CLASSA_NET;
+ else if (IN_CLASSB(*netp))
+ *maskp = IN_CLASSB_NET;
+ else if (IN_CLASSC(*netp))
+ *maskp = IN_CLASSC_NET;
+ else {
+ (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "inet class for 0x%x unknown", *netp);
+ return (-1);
+ }
+ }
+ *netp &= *maskp;
+ return (0);
+}
+#endif /* !defined(_WIN32) && !defined(MSDOS) */
+
+#ifdef ENABLE_REMOTE
+#include "pcap-rpcap.h"
+
+/*
+ * Extract a substring from a string.
+ */
+static char *
+get_substring(const char *p, size_t len, char *ebuf)
+{
+ char *token;
+
+ token = malloc(len + 1);
+ if (token == NULL) {
+ pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ return (NULL);
+ }
+ memcpy(token, p, len);
+ token[len] = '\0';
+ return (token);
+}
+
+/*
+ * Parse a capture source that might be a URL.
+ *
+ * If the source is not a URL, *schemep, *userinfop, *hostp, and *portp
+ * are set to NULL, *pathp is set to point to the source, and 0 is
+ * returned.
+ *
+ * If source is a URL, and the URL refers to a local device (a special
+ * case of rpcap:), *schemep, *userinfop, *hostp, and *portp are set
+ * to NULL, *pathp is set to point to the device name, and 0 is returned.
+ *
+ * If source is a URL, and it's not a special case that refers to a local
+ * device, and the parse succeeds:
+ *
+ * *schemep is set to point to an allocated string containing the scheme;
+ *
+ * if user information is present in the URL, *userinfop is set to point
+ * to an allocated string containing the user information, otherwise
+ * it's set to NULL;
+ *
+ * if host information is present in the URL, *hostp is set to point
+ * to an allocated string containing the host information, otherwise
+ * it's set to NULL;
+ *
+ * if a port number is present in the URL, *portp is set to point
+ * to an allocated string containing the port number, otherwise
+ * it's set to NULL;
+ *
+ * *pathp is set to point to an allocated string containing the
+ * path;
+ *
+ * and 0 is returned.
+ *
+ * If the parse fails, ebuf is set to an error string, and -1 is returned.
+ */
+static int
+pcap_parse_source(const char *source, char **schemep, char **userinfop,
+ char **hostp, char **portp, char **pathp, char *ebuf)
+{
+ char *colonp;
+ size_t scheme_len;
+ char *scheme;
+ const char *endp;
+ size_t authority_len;
+ char *authority;
+ char *parsep, *atsignp, *bracketp;
+ char *userinfo, *host, *port, *path;
+
+ /*
+ * Start out returning nothing.
+ */
+ *schemep = NULL;
+ *userinfop = NULL;
+ *hostp = NULL;
+ *portp = NULL;
+ *pathp = NULL;
+
+ /*
+ * RFC 3986 says:
+ *
+ * URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
+ *
+ * hier-part = "//" authority path-abempty
+ * / path-absolute
+ * / path-rootless
+ * / path-empty
+ *
+ * authority = [ userinfo "@" ] host [ ":" port ]
+ *
+ * userinfo = *( unreserved / pct-encoded / sub-delims / ":" )
+ *
+ * Step 1: look for the ":" at the end of the scheme.
+ * A colon in the source is *NOT* sufficient to indicate that
+ * this is a URL, as interface names on some platforms might
+ * include colons (e.g., I think some Solaris interfaces
+ * might).
+ */
+ colonp = strchr(source, ':');
+ if (colonp == NULL) {
+ /*
+ * The source is the device to open.
+ * Return a NULL pointer for the scheme, user information,
+ * host, and port, and return the device as the path.
+ */
+ *pathp = strdup(source);
+ if (*pathp == NULL) {
+ pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ return (-1);
+ }
+ return (0);
+ }
+
+ /*
+ * All schemes must have "//" after them, i.e. we only support
+ * hier-part = "//" authority path-abempty, not
+ * hier-part = path-absolute
+ * hier-part = path-rootless
+ * hier-part = path-empty
+ *
+ * We need that in order to distinguish between a local device
+ * name that happens to contain a colon and a URI.
+ */
+ if (strncmp(colonp + 1, "//", 2) != 0) {
+ /*
+ * The source is the device to open.
+ * Return a NULL pointer for the scheme, user information,
+ * host, and port, and return the device as the path.
+ */
+ *pathp = strdup(source);
+ if (*pathp == NULL) {
+ pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ return (-1);
+ }
+ return (0);
+ }
+
+ /*
+ * XXX - check whether the purported scheme could be a scheme?
+ */
+
+ /*
+ * OK, this looks like a URL.
+ * Get the scheme.
+ */
+ scheme_len = colonp - source;
+ scheme = malloc(scheme_len + 1);
+ if (scheme == NULL) {
+ pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ return (-1);
+ }
+ memcpy(scheme, source, scheme_len);
+ scheme[scheme_len] = '\0';
+
+ /*
+ * Treat file: specially - take everything after file:// as
+ * the pathname.
+ */
+ if (pcap_strcasecmp(scheme, "file") == 0) {
+ *pathp = strdup(colonp + 3);
+ if (*pathp == NULL) {
+ pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ free(scheme);
+ return (-1);
+ }
+ *schemep = scheme;
+ return (0);
+ }
+
+ /*
+ * The WinPcap documentation says you can specify a local
+ * interface with "rpcap://{device}"; we special-case
+ * that here. If the scheme is "rpcap", and there are
+ * no slashes past the "//", we just return the device.
+ *
+ * XXX - %-escaping?
+ */
+ if ((pcap_strcasecmp(scheme, "rpcap") == 0 ||
+ pcap_strcasecmp(scheme, "rpcaps") == 0) &&
+ strchr(colonp + 3, '/') == NULL) {
+ /*
+ * Local device.
+ *
+ * Return a NULL pointer for the scheme, user information,
+ * host, and port, and return the device as the path.
+ */
+ free(scheme);
+ *pathp = strdup(colonp + 3);
+ if (*pathp == NULL) {
+ pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ return (-1);
+ }
+ return (0);
+ }
+
+ /*
+ * OK, now start parsing the authority.
+ * Get token, terminated with / or terminated at the end of
+ * the string.
+ */
+ authority_len = strcspn(colonp + 3, "/");
+ authority = get_substring(colonp + 3, authority_len, ebuf);
+ if (authority == NULL) {
+ /*
+ * Error.
+ */
+ free(scheme);
+ return (-1);
+ }
+ endp = colonp + 3 + authority_len;
+
+ /*
+ * Now carve the authority field into its components.
+ */
+ parsep = authority;
+
+ /*
+ * Is there a userinfo field?
+ */
+ atsignp = strchr(parsep, '@');
+ if (atsignp != NULL) {
+ /*
+ * Yes.
+ */
+ size_t userinfo_len;
+
+ userinfo_len = atsignp - parsep;
+ userinfo = get_substring(parsep, userinfo_len, ebuf);
+ if (userinfo == NULL) {
+ /*
+ * Error.
+ */
+ free(authority);
+ free(scheme);
+ return (-1);
+ }
+ parsep = atsignp + 1;
+ } else {
+ /*
+ * No.
+ */
+ userinfo = NULL;
+ }
+
+ /*
+ * Is there a host field?
+ */
+ if (*parsep == '\0') {
+ /*
+ * No; there's no host field or port field.
+ */
+ host = NULL;
+ port = NULL;
+ } else {
+ /*
+ * Yes.
+ */
+ size_t host_len;
+
+ /*
+ * Is it an IP-literal?
+ */
+ if (*parsep == '[') {
+ /*
+ * Yes.
+ * Treat verything up to the closing square
+ * bracket as the IP-Literal; we don't worry
+ * about whether it's a valid IPv6address or
+ * IPvFuture (or an IPv4address, for that
+ * matter, just in case we get handed a
+ * URL with an IPv4 IP-Literal, of the sort
+ * that pcap_createsrcstr() used to generate,
+ * and that pcap_parsesrcstr(), in the original
+ * WinPcap code, accepted).
+ */
+ bracketp = strchr(parsep, ']');
+ if (bracketp == NULL) {
+ /*
+ * There's no closing square bracket.
+ */
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "IP-literal in URL doesn't end with ]");
+ free(userinfo);
+ free(authority);
+ free(scheme);
+ return (-1);
+ }
+ if (*(bracketp + 1) != '\0' &&
+ *(bracketp + 1) != ':') {
+ /*
+ * There's extra crud after the
+ * closing square bracketn.
+ */
+ snprintf(ebuf, PCAP_ERRBUF_SIZE,
+ "Extra text after IP-literal in URL");
+ free(userinfo);
+ free(authority);
+ free(scheme);
+ return (-1);
+ }
+ host_len = (bracketp - 1) - parsep;
+ host = get_substring(parsep + 1, host_len, ebuf);
+ if (host == NULL) {
+ /*
+ * Error.
+ */
+ free(userinfo);
+ free(authority);
+ free(scheme);
+ return (-1);
+ }
+ parsep = bracketp + 1;
+ } else {
+ /*
+ * No.
+ * Treat everything up to a : or the end of
+ * the string as the host.
+ */
+ host_len = strcspn(parsep, ":");
+ host = get_substring(parsep, host_len, ebuf);
+ if (host == NULL) {
+ /*
+ * Error.
+ */
+ free(userinfo);
+ free(authority);
+ free(scheme);
+ return (-1);
+ }
+ parsep = parsep + host_len;
+ }
+
+ /*
+ * Is there a port field?
+ */
+ if (*parsep == ':') {
+ /*
+ * Yes. It's the rest of the authority field.
+ */
+ size_t port_len;
+
+ parsep++;
+ port_len = strlen(parsep);
+ port = get_substring(parsep, port_len, ebuf);
+ if (port == NULL) {
+ /*
+ * Error.
+ */
+ free(host);
+ free(userinfo);
+ free(authority);
+ free(scheme);
+ return (-1);
+ }
+ } else {
+ /*
+ * No.
+ */
+ port = NULL;
+ }
+ }
+ free(authority);
+
+ /*
+ * Everything else is the path. Strip off the leading /.
+ */
+ if (*endp == '\0')
+ path = strdup("");
+ else
+ path = strdup(endp + 1);
+ if (path == NULL) {
+ pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ free(port);
+ free(host);
+ free(userinfo);
+ free(scheme);
+ return (-1);
+ }
+ *schemep = scheme;
+ *userinfop = userinfo;
+ *hostp = host;
+ *portp = port;
+ *pathp = path;
+ return (0);
+}
+
+int
+pcap_createsrcstr_ex(char *source, int type, const char *host, const char *port,
+ const char *name, unsigned char uses_ssl, char *errbuf)
+{
+ switch (type) {
+
+ case PCAP_SRC_FILE:
+ pcap_strlcpy(source, PCAP_SRC_FILE_STRING, PCAP_BUF_SIZE);
+ if (name != NULL && *name != '\0') {
+ pcap_strlcat(source, name, PCAP_BUF_SIZE);
+ return (0);
+ } else {
+ snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "The file name cannot be NULL.");
+ return (-1);
+ }
+
+ case PCAP_SRC_IFREMOTE:
+ pcap_strlcpy(source,
+ (uses_ssl ? "rpcaps://" : PCAP_SRC_IF_STRING),
+ PCAP_BUF_SIZE);
+ if (host != NULL && *host != '\0') {
+ if (strchr(host, ':') != NULL) {
+ /*
+ * The host name contains a colon, so it's
+ * probably an IPv6 address, and needs to
+ * be included in square brackets.
+ */
+ pcap_strlcat(source, "[", PCAP_BUF_SIZE);
+ pcap_strlcat(source, host, PCAP_BUF_SIZE);
+ pcap_strlcat(source, "]", PCAP_BUF_SIZE);
+ } else
+ pcap_strlcat(source, host, PCAP_BUF_SIZE);
+
+ if (port != NULL && *port != '\0') {
+ pcap_strlcat(source, ":", PCAP_BUF_SIZE);
+ pcap_strlcat(source, port, PCAP_BUF_SIZE);
+ }
+
+ pcap_strlcat(source, "/", PCAP_BUF_SIZE);
+ } else {
+ snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "The host name cannot be NULL.");
+ return (-1);
+ }
+
+ if (name != NULL && *name != '\0')
+ pcap_strlcat(source, name, PCAP_BUF_SIZE);
+
+ return (0);
+
+ case PCAP_SRC_IFLOCAL:
+ pcap_strlcpy(source, PCAP_SRC_IF_STRING, PCAP_BUF_SIZE);
+
+ if (name != NULL && *name != '\0')
+ pcap_strlcat(source, name, PCAP_BUF_SIZE);
+
+ return (0);
+
+ default:
+ snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "The interface type is not valid.");
+ return (-1);
+ }
+}
+
+
+int
+pcap_createsrcstr(char *source, int type, const char *host, const char *port,
+ const char *name, char *errbuf)
+{
+ return (pcap_createsrcstr_ex(source, type, host, port, name, 0, errbuf));
+}
+
+int
+pcap_parsesrcstr_ex(const char *source, int *type, char *host, char *port,
+ char *name, unsigned char *uses_ssl, char *errbuf)
+{
+ char *scheme, *tmpuserinfo, *tmphost, *tmpport, *tmppath;
+
+ /* Initialization stuff */
+ if (host)
+ *host = '\0';
+ if (port)
+ *port = '\0';
+ if (name)
+ *name = '\0';
+ if (uses_ssl)
+ *uses_ssl = 0;
+
+ /* Parse the source string */
+ if (pcap_parse_source(source, &scheme, &tmpuserinfo, &tmphost,
+ &tmpport, &tmppath, errbuf) == -1) {
+ /*
+ * Fail.
+ */
+ return (-1);
+ }
+
+ if (scheme == NULL) {
+ /*
+ * Local device.
+ */
+ if (name && tmppath)
+ pcap_strlcpy(name, tmppath, PCAP_BUF_SIZE);
+ if (type)
+ *type = PCAP_SRC_IFLOCAL;
+ free(tmppath);
+ free(tmpport);
+ free(tmphost);
+ free(tmpuserinfo);
+ return (0);
+ }
+
+ int is_rpcap = 0;
+ if (strcmp(scheme, "rpcaps") == 0) {
+ is_rpcap = 1;
+ if (uses_ssl) *uses_ssl = 1;
+ } else if (strcmp(scheme, "rpcap") == 0) {
+ is_rpcap = 1;
+ }
+
+ if (is_rpcap) {
+ /*
+ * rpcap[s]://
+ *
+ * pcap_parse_source() has already handled the case of
+ * rpcap[s]://device
+ */
+ if (host && tmphost) {
+ if (tmpuserinfo)
+ snprintf(host, PCAP_BUF_SIZE, "%s@%s",
+ tmpuserinfo, tmphost);
+ else
+ pcap_strlcpy(host, tmphost, PCAP_BUF_SIZE);
+ }
+ if (port && tmpport)
+ pcap_strlcpy(port, tmpport, PCAP_BUF_SIZE);
+ if (name && tmppath)
+ pcap_strlcpy(name, tmppath, PCAP_BUF_SIZE);
+ if (type)
+ *type = PCAP_SRC_IFREMOTE;
+ free(tmppath);
+ free(tmpport);
+ free(tmphost);
+ free(tmpuserinfo);
+ free(scheme);
+ return (0);
+ }
+
+ if (strcmp(scheme, "file") == 0) {
+ /*
+ * file://
+ */
+ if (name && tmppath)
+ pcap_strlcpy(name, tmppath, PCAP_BUF_SIZE);
+ if (type)
+ *type = PCAP_SRC_FILE;
+ free(tmppath);
+ free(tmpport);
+ free(tmphost);
+ free(tmpuserinfo);
+ free(scheme);
+ return (0);
+ }
+
+ /*
+ * Neither rpcap: nor file:; just treat the entire string
+ * as a local device.
+ */
+ if (name)
+ pcap_strlcpy(name, source, PCAP_BUF_SIZE);
+ if (type)
+ *type = PCAP_SRC_IFLOCAL;
+ free(tmppath);
+ free(tmpport);
+ free(tmphost);
+ free(tmpuserinfo);
+ free(scheme);
+ return (0);
+}
+
+int
+pcap_parsesrcstr(const char *source, int *type, char *host, char *port,
+ char *name, char *errbuf)
+{
+ return (pcap_parsesrcstr_ex(source, type, host, port, name, NULL, errbuf));
+}
+#endif
+
+pcap_t *
+pcap_create(const char *device, char *errbuf)
+{
+ size_t i;
+ int is_theirs;
+ pcap_t *p;
+ char *device_str;
+
+ /*
+ * A null device name is equivalent to the "any" device -
+ * which might not be supported on this platform, but
+ * this means that you'll get a "not supported" error
+ * rather than, say, a crash when we try to dereference
+ * the null pointer.
+ */
+ if (device == NULL)
+ device_str = strdup("any");
+ else {
+#ifdef _WIN32
+ /*
+ * On Windows, for backwards compatibility reasons,
+ * pcap_lookupdev() returns a pointer to a sequence of
+ * pairs of UTF-16LE device names and local code page
+ * description strings.
+ *
+ * This means that if a program uses pcap_lookupdev()
+ * to get a default device, and hands that to an API
+ * that opens devices, we'll get handed a UTF-16LE
+ * string, not a string in the local code page.
+ *
+ * To work around that, we check whether the string
+ * looks as if it might be a UTF-16LE string and, if
+ * so, convert it back to the local code page's
+ * extended ASCII.
+ *
+ * We disable that check in "new API" mode, because:
+ *
+ * 1) You *cannot* reliably detect whether a
+ * string is UTF-16LE or not; "a" could either
+ * be a one-character ASCII string or the first
+ * character of a UTF-16LE string.
+ *
+ * 2) Doing that test can run past the end of
+ * the string, if it's a 1-character ASCII
+ * string
+ *
+ * This particular version of this heuristic dates
+ * back to WinPcap 4.1.1; PacketOpenAdapter() does
+ * uses the same heuristic, with the exact same
+ * vulnerability.
+ *
+ * That's why we disable this in "new API" mode.
+ * We keep it around in legacy mode for backwards
+ * compatibility.
+ */
+ if (!pcap_new_api && device[0] != '\0' && device[1] == '\0') {
+ size_t length;
+
+ length = wcslen((wchar_t *)device);
+ device_str = (char *)malloc(length + 1);
+ if (device_str == NULL) {
+ pcap_fmt_errmsg_for_errno(errbuf,
+ PCAP_ERRBUF_SIZE, errno,
+ "malloc");
+ return (NULL);
+ }
+
+ snprintf(device_str, length + 1, "%ws",
+ (const wchar_t *)device);
+ } else
+#endif
+ device_str = strdup(device);
+ }
+ if (device_str == NULL) {
+ pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ return (NULL);
+ }
+
+ /*
+ * Try each of the non-local-network-interface capture
+ * source types until we find one that works for this
+ * device or run out of types.
+ */
+ for (i = 0; capture_source_types[i].create_op != NULL; i++) {
+ is_theirs = 0;
+ p = capture_source_types[i].create_op(device_str, errbuf,
+ &is_theirs);
+ if (is_theirs) {
+ /*
+ * The device name refers to a device of the
+ * type in question; either it succeeded,
+ * in which case p refers to a pcap_t to
+ * later activate for the device, or it
+ * failed, in which case p is null and we
+ * should return that to report the failure
+ * to create.
+ */
+ if (p == NULL) {
+ /*
+ * We assume the caller filled in errbuf.
+ */
+ free(device_str);
+ return (NULL);
+ }
+ p->opt.device = device_str;
+ return (p);
+ }
+ }
+
+ /*
+ * OK, try it as a regular network interface.
+ */
+ p = pcap_create_interface(device_str, errbuf);
+ if (p == NULL) {
+ /*
+ * We assume the caller filled in errbuf.
+ */
+ free(device_str);
+ return (NULL);
+ }
+ p->opt.device = device_str;
+ return (p);
+}
+
+/*
+ * Set nonblocking mode on an unactivated pcap_t; this sets a flag
+ * checked by pcap_activate(), which sets the mode after calling
+ * the activate routine.
+ */
+static int
+pcap_setnonblock_unactivated(pcap_t *p, int nonblock)
+{
+ p->opt.nonblock = nonblock;
+ return (0);
+}
+
+static void
+initialize_ops(pcap_t *p)
+{
+ /*
+ * Set operation pointers for operations that only work on
+ * an activated pcap_t to point to a routine that returns
+ * a "this isn't activated" error.
+ */
+ p->read_op = pcap_read_not_initialized;
+ p->inject_op = pcap_inject_not_initialized;
+ p->setfilter_op = pcap_setfilter_not_initialized;
+ p->setdirection_op = pcap_setdirection_not_initialized;
+ p->set_datalink_op = pcap_set_datalink_not_initialized;
+ p->getnonblock_op = pcap_getnonblock_not_initialized;
+ p->stats_op = pcap_stats_not_initialized;
+#ifdef _WIN32
+ p->stats_ex_op = pcap_stats_ex_not_initialized;
+ p->setbuff_op = pcap_setbuff_not_initialized;
+ p->setmode_op = pcap_setmode_not_initialized;
+ p->setmintocopy_op = pcap_setmintocopy_not_initialized;
+ p->getevent_op = pcap_getevent_not_initialized;
+ p->oid_get_request_op = pcap_oid_get_request_not_initialized;
+ p->oid_set_request_op = pcap_oid_set_request_not_initialized;
+ p->sendqueue_transmit_op = pcap_sendqueue_transmit_not_initialized;
+ p->setuserbuffer_op = pcap_setuserbuffer_not_initialized;
+ p->live_dump_op = pcap_live_dump_not_initialized;
+ p->live_dump_ended_op = pcap_live_dump_ended_not_initialized;
+ p->get_airpcap_handle_op = pcap_get_airpcap_handle_not_initialized;
+#endif
+
+ /*
+ * Default cleanup operation - implementations can override
+ * this, but should call pcap_cleanup_live_common() after
+ * doing their own additional cleanup.
+ */
+ p->cleanup_op = pcap_cleanup_live_common;
+
+ /*
+ * In most cases, the standard one-shot callback can
+ * be used for pcap_next()/pcap_next_ex().
+ */
+ p->oneshot_callback = pcap_oneshot;
+
+ /*
+ * Default breakloop operation - implementations can override
+ * this, but should call pcap_breakloop_common() before doing
+ * their own logic.
+ */
+ p->breakloop_op = pcap_breakloop_common;
+}
+
+static pcap_t *
+pcap_alloc_pcap_t(char *ebuf, size_t total_size, size_t private_offset)
+{
+ char *chunk;
+ pcap_t *p;
+
+ /*
+ * total_size is the size of a structure containing a pcap_t
+ * followed by a private structure.
+ */
+ chunk = calloc(total_size, 1);
+ if (chunk == NULL) {
+ pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
+ errno, "malloc");
+ return (NULL);
+ }
+
+ /*
+ * Get a pointer to the pcap_t at the beginning.
+ */
+ p = (pcap_t *)chunk;
+
+#ifdef _WIN32
+ p->handle = INVALID_HANDLE_VALUE; /* not opened yet */
+#else /* _WIN32 */
+ p->fd = -1; /* not opened yet */
+#ifndef MSDOS
+ p->selectable_fd = -1;
+ p->required_select_timeout = NULL;
+#endif /* MSDOS */
+#endif /* _WIN32 */
+
+ /*
+ * private_offset is the offset, in bytes, of the private
+ * data from the beginning of the structure.
+ *
+ * Set the pointer to the private data; that's private_offset
+ * bytes past the pcap_t.
+ */
+ p->priv = (void *)(chunk + private_offset);
+
+ return (p);
+}
+
+pcap_t *
+pcap_create_common(char *ebuf, size_t total_size, size_t private_offset)
+{
+ pcap_t *p;
+
+ p = pcap_alloc_pcap_t(ebuf, total_size, private_offset);
+ if (p == NULL)
+ return (NULL);
+
+ /*
+ * Default to "can't set rfmon mode"; if it's supported by
+ * a platform, the create routine that called us can set
+ * the op to its routine to check whether a particular
+ * device supports it.
+ */
+ p->can_set_rfmon_op = pcap_cant_set_rfmon;
+
+ /*
+ * If pcap_setnonblock() is called on a not-yet-activated
+ * pcap_t, default to setting a flag and turning
+ * on non-blocking mode when activated.
+ */
+ p->setnonblock_op = pcap_setnonblock_unactivated;
+
+ initialize_ops(p);
+
+ /* put in some defaults*/
+ p->snapshot = 0; /* max packet size unspecified */
+ p->opt.timeout = 0; /* no timeout specified */
+ p->opt.buffer_size = 0; /* use the platform's default */
+ p->opt.promisc = 0;
+ p->opt.rfmon = 0;
+ p->opt.immediate = 0;
+ p->opt.tstamp_type = -1; /* default to not setting time stamp type */
+ p->opt.tstamp_precision = PCAP_TSTAMP_PRECISION_MICRO;
+ /*
+ * Platform-dependent options.
+ */
+#ifdef __linux__
+ p->opt.protocol = 0;
+#endif
+#ifdef _WIN32
+ p->opt.nocapture_local = 0;
+#endif
+
+ /*
+ * Start out with no BPF code generation flags set.
+ */
+ p->bpf_codegen_flags = 0;
+
+ return (p);
+}
+
+int
+pcap_check_activated(pcap_t *p)
+{
+ if (p->activated) {
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "can't perform "
+ " operation on activated capture");
+ return (-1);
+ }
+ return (0);
+}
+
+int
+pcap_set_snaplen(pcap_t *p, int snaplen)
+{
+ if (pcap_check_activated(p))
+ return (PCAP_ERROR_ACTIVATED);
+ p->snapshot = snaplen;
+ return (0);
+}
+
+int
+pcap_set_promisc(pcap_t *p, int promisc)
+{
+ if (pcap_check_activated(p))
+ return (PCAP_ERROR_ACTIVATED);
+ p->opt.promisc = promisc;
+ return (0);
+}
+
+int
+pcap_set_rfmon(pcap_t *p, int rfmon)
+{
+ if (pcap_check_activated(p))
+ return (PCAP_ERROR_ACTIVATED);
+ p->opt.rfmon = rfmon;
+ return (0);
+}
+
+int
+pcap_set_timeout(pcap_t *p, int timeout_ms)
+{
+ if (pcap_check_activated(p))
+ return (PCAP_ERROR_ACTIVATED);
+ p->opt.timeout = timeout_ms;
+ return (0);
+}
+
+int
+pcap_set_tstamp_type(pcap_t *p, int tstamp_type)
+{
+ int i;
+
+ if (pcap_check_activated(p))
+ return (PCAP_ERROR_ACTIVATED);
+
+ /*
+ * The argument should have been u_int, but that's too late
+ * to change now - it's an API.
+ */
+ if (tstamp_type < 0)
+ return (PCAP_WARNING_TSTAMP_TYPE_NOTSUP);
+
+ /*
+ * If p->tstamp_type_count is 0, we only support PCAP_TSTAMP_HOST;
+ * the default time stamp type is PCAP_TSTAMP_HOST.
+ */
+ if (p->tstamp_type_count == 0) {
+ if (tstamp_type == PCAP_TSTAMP_HOST) {
+ p->opt.tstamp_type = tstamp_type;
+ return (0);
+ }
+ } else {
+ /*
+ * Check whether we claim to support this type of time stamp.
+ */
+ for (i = 0; i < p->tstamp_type_count; i++) {
+ if (p->tstamp_type_list[i] == (u_int)tstamp_type) {
+ /*
+ * Yes.
+ */
+ p->opt.tstamp_type = tstamp_type;
+ return (0);
+ }
+ }
+ }
+
+ /*
+ * We don't support this type of time stamp.
+ */
+ return (PCAP_WARNING_TSTAMP_TYPE_NOTSUP);
+}
+
+int
+pcap_set_immediate_mode(pcap_t *p, int immediate)
+{
+ if (pcap_check_activated(p))
+ return (PCAP_ERROR_ACTIVATED);
+ p->opt.immediate = immediate;
+ return (0);
+}
+
+int
+pcap_set_buffer_size(pcap_t *p, int buffer_size)
+{
+ if (pcap_check_activated(p))
+ return (PCAP_ERROR_ACTIVATED);
+ if (buffer_size <= 0) {
+ /*
+ * Silently ignore invalid values.
+ */
+ return (0);
+ }
+ p->opt.buffer_size = buffer_size;
+ return (0);
+}
+
+int
+pcap_set_tstamp_precision(pcap_t *p, int tstamp_precision)
+{
+ int i;
+
+ if (pcap_check_activated(p))
+ return (PCAP_ERROR_ACTIVATED);
+
+ /*
+ * The argument should have been u_int, but that's too late
+ * to change now - it's an API.
+ */
+ if (tstamp_precision < 0)
+ return (PCAP_ERROR_TSTAMP_PRECISION_NOTSUP);
+
+ /*
+ * If p->tstamp_precision_count is 0, we only support setting
+ * the time stamp precision to microsecond precision; every
+ * pcap module *MUST* support microsecond precision, even if
+ * it does so by converting the native precision to
+ * microseconds.
+ */
+ if (p->tstamp_precision_count == 0) {
+ if (tstamp_precision == PCAP_TSTAMP_PRECISION_MICRO) {
+ p->opt.tstamp_precision = tstamp_precision;
+ return (0);
+ }
+ } else {
+ /*
+ * Check whether we claim to support this precision of
+ * time stamp.
+ */
+ for (i = 0; i < p->tstamp_precision_count; i++) {
+ if (p->tstamp_precision_list[i] == (u_int)tstamp_precision) {
+ /*
+ * Yes.
+ */
+ p->opt.tstamp_precision = tstamp_precision;
+ return (0);
+ }
+ }
+ }
+
+ /*
+ * We don't support this time stamp precision.
+ */
+ return (PCAP_ERROR_TSTAMP_PRECISION_NOTSUP);
+}
+
+int
+pcap_get_tstamp_precision(pcap_t *p)
+{
+ return (p->opt.tstamp_precision);
+}
+
+int
+pcap_activate(pcap_t *p)
+{
+ int status;
+
+ /*
+ * Catch attempts to re-activate an already-activated
+ * pcap_t; this should, for example, catch code that
+ * calls pcap_open_live() followed by pcap_activate(),
+ * as some code that showed up in a Stack Exchange
+ * question did.
+ */
+ if (pcap_check_activated(p))
+ return (PCAP_ERROR_ACTIVATED);
+ status = p->activate_op(p);
+ if (status >= 0) {
+ /*
+ * If somebody requested non-blocking mode before
+ * calling pcap_activate(), turn it on now.
+ */
+ if (p->opt.nonblock) {
+ status = p->setnonblock_op(p, 1);
+ if (status < 0) {
+ /*
+ * Failed. Undo everything done by
+ * the activate operation.
+ */
+ p->cleanup_op(p);
+ initialize_ops(p);
+ return (status);
+ }
+ }
+ p->activated = 1;
+ } else {
+ if (p->errbuf[0] == '\0') {
+ /*
+ * No error message supplied by the activate routine;
+ * for the benefit of programs that don't specially
+ * handle errors other than PCAP_ERROR, return the
+ * error message corresponding to the status.
+ */
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "%s",
+ pcap_statustostr(status));
+ }
+
+ /*
+ * Undo any operation pointer setting, etc. done by
+ * the activate operation.
+ */
+ initialize_ops(p);
+ }
+ return (status);
+}
+
+pcap_t *
+pcap_open_live(const char *device, int snaplen, int promisc, int to_ms, char *errbuf)
+{
+ pcap_t *p;
+ int status;
+#ifdef ENABLE_REMOTE
+ char host[PCAP_BUF_SIZE + 1];
+ char port[PCAP_BUF_SIZE + 1];
+ char name[PCAP_BUF_SIZE + 1];
+ int srctype;
+
+ /*
+ * A null device name is equivalent to the "any" device -
+ * which might not be supported on this platform, but
+ * this means that you'll get a "not supported" error
+ * rather than, say, a crash when we try to dereference
+ * the null pointer.
+ */
+ if (device == NULL)
+ device = "any";
+
+ /*
+ * Retrofit - we have to make older applications compatible with
+ * remote capture.
+ * So we're calling pcap_open_remote() from here; this is a very
+ * dirty hack.
+ * Obviously, we cannot exploit all the new features; for instance,
+ * we cannot send authentication, we cannot use a UDP data connection,
+ * and so on.
+ */
+ if (pcap_parsesrcstr(device, &srctype, host, port, name, errbuf))
+ return (NULL);
+
+ if (srctype == PCAP_SRC_IFREMOTE) {
+ /*
+ * Although we already have host, port and iface, we prefer
+ * to pass only 'device' to pcap_open_rpcap(), so that it has
+ * to call pcap_parsesrcstr() again.
+ * This is less optimized, but much clearer.
+ */
+ return (pcap_open_rpcap(device, snaplen,
+ promisc ? PCAP_OPENFLAG_PROMISCUOUS : 0, to_ms,
+ NULL, errbuf));
+ }
+ if (srctype == PCAP_SRC_FILE) {
+ snprintf(errbuf, PCAP_ERRBUF_SIZE, "unknown URL scheme \"file\"");
+ return (NULL);
+ }
+ if (srctype == PCAP_SRC_IFLOCAL) {
+ /*
+ * If it starts with rpcap://, that refers to a local device
+ * (no host part in the URL). Remove the rpcap://, and
+ * fall through to the regular open path.
+ */
+ if (strncmp(device, PCAP_SRC_IF_STRING, strlen(PCAP_SRC_IF_STRING)) == 0) {
+ size_t len = strlen(device) - strlen(PCAP_SRC_IF_STRING) + 1;
+
+ if (len > 0)
+ device += strlen(PCAP_SRC_IF_STRING);
+ }
+ }
+#endif /* ENABLE_REMOTE */
+
+ p = pcap_create(device, errbuf);
+ if (p == NULL)
+ return (NULL);
+ status = pcap_set_snaplen(p, snaplen);
+ if (status < 0)
+ goto fail;
+ status = pcap_set_promisc(p, promisc);
+ if (status < 0)
+ goto fail;
+ status = pcap_set_timeout(p, to_ms);
+ if (status < 0)
+ goto fail;
+ /*
+ * Mark this as opened with pcap_open_live(), so that, for
+ * example, we show the full list of DLT_ values, rather
+ * than just the ones that are compatible with capturing
+ * when not in monitor mode. That allows existing applications
+ * to work the way they used to work, but allows new applications
+ * that know about the new open API to, for example, find out the
+ * DLT_ values that they can select without changing whether
+ * the adapter is in monitor mode or not.
+ */
+ p->oldstyle = 1;
+ status = pcap_activate(p);
+ if (status < 0)
+ goto fail;
+ return (p);
+fail:
+ if (status == PCAP_ERROR) {
+ /*
+ * Another buffer is a bit cumbersome, but it avoids
+ * -Wformat-truncation.
+ */
+ char trimbuf[PCAP_ERRBUF_SIZE - 5]; /* 2 bytes shorter */
+
+ pcap_strlcpy(trimbuf, p->errbuf, sizeof(trimbuf));
+ snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %.*s", device,
+ PCAP_ERRBUF_SIZE - 3, trimbuf);
+ } else if (status == PCAP_ERROR_NO_SUCH_DEVICE ||
+ status == PCAP_ERROR_PERM_DENIED ||
+ status == PCAP_ERROR_PROMISC_PERM_DENIED) {
+ /*
+ * Only show the additional message if it's not
+ * empty.
+ */
+ if (p->errbuf[0] != '\0') {
+ /*
+ * Idem.
+ */
+ char trimbuf[PCAP_ERRBUF_SIZE - 8]; /* 2 bytes shorter */
+
+ pcap_strlcpy(trimbuf, p->errbuf, sizeof(trimbuf));
+ snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s (%.*s)",
+ device, pcap_statustostr(status),
+ PCAP_ERRBUF_SIZE - 6, trimbuf);
+ } else {
+ snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s",
+ device, pcap_statustostr(status));
+ }
+ } else {
+ snprintf(errbuf, PCAP_ERRBUF_SIZE, "%s: %s", device,
+ pcap_statustostr(status));
+ }
+ pcap_close(p);
+ return (NULL);
+}
+
+pcap_t *
+pcap_open_offline_common(char *ebuf, size_t total_size, size_t private_offset)
+{
+ pcap_t *p;
+
+ p = pcap_alloc_pcap_t(ebuf, total_size, private_offset);
+ if (p == NULL)
+ return (NULL);
+
+ p->opt.tstamp_precision = PCAP_TSTAMP_PRECISION_MICRO;
+
+ return (p);
+}
+
+int
+pcap_dispatch(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
+{
+ return (p->read_op(p, cnt, callback, user));
+}
+
+int
+pcap_loop(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
+{
+ register int n;
+
+ for (;;) {
+ if (p->rfile != NULL) {
+ /*
+ * 0 means EOF, so don't loop if we get 0.
+ */
+ n = pcap_offline_read(p, cnt, callback, user);
+ } else {
+ /*
+ * XXX keep reading until we get something
+ * (or an error occurs)
+ */
+ do {
+ n = p->read_op(p, cnt, callback, user);
+ } while (n == 0);
+ }
+ if (n <= 0)
+ return (n);
+ if (!PACKET_COUNT_IS_UNLIMITED(cnt)) {
+ cnt -= n;
+ if (cnt <= 0)
+ return (0);
+ }
+ }
+}
+
+/*
+ * Force the loop in "pcap_read()" or "pcap_read_offline()" to terminate.
+ */
+void
+pcap_breakloop(pcap_t *p)
+{
+ p->breakloop_op(p);
+}
+
+int
+pcap_datalink(pcap_t *p)
+{
+ if (!p->activated)
+ return (PCAP_ERROR_NOT_ACTIVATED);
+ return (p->linktype);
+}
+
+int
+pcap_datalink_ext(pcap_t *p)
+{
+ if (!p->activated)
+ return (PCAP_ERROR_NOT_ACTIVATED);
return (p->linktype_ext);
}
*/
*dlt_buffer = (int*)malloc(sizeof(**dlt_buffer));
if (*dlt_buffer == NULL) {
- (void)pcap_snprintf(p->errbuf, sizeof(p->errbuf),
- "malloc: %s", pcap_strerror(errno));
+ pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
+ errno, "malloc");
return (PCAP_ERROR);
}
**dlt_buffer = p->linktype;
} else {
*dlt_buffer = (int*)calloc(sizeof(**dlt_buffer), p->dlt_count);
if (*dlt_buffer == NULL) {
- (void)pcap_snprintf(p->errbuf, sizeof(p->errbuf),
- "malloc: %s", pcap_strerror(errno));
+ pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf),
+ errno, "malloc");
return (PCAP_ERROR);
}
(void)memcpy(*dlt_buffer, p->dlt_list,
unsupported:
dlt_name = pcap_datalink_val_to_name(dlt);
if (dlt_name != NULL) {
- (void) pcap_snprintf(p->errbuf, sizeof(p->errbuf),
+ (void) snprintf(p->errbuf, sizeof(p->errbuf),
"%s is not one of the DLTs supported by this device",
dlt_name);
} else {
- (void) pcap_snprintf(p->errbuf, sizeof(p->errbuf),
+ (void) snprintf(p->errbuf, sizeof(p->errbuf),
"DLT %d is not one of the DLTs supported by this device",
dlt);
}
return (cm[*us1] - cm[*--us2]);
}
-struct dlt_choice {
- const char *name;
- const char *description;
- int dlt;
-};
-
-#define DLT_CHOICE(code, description) { #code, description, code }
-#define DLT_CHOICE_SENTINEL { NULL, NULL, 0 }
+struct dlt_choice {
+ const char *name;
+ const char *description;
+ int dlt;
+};
+
+#define DLT_CHOICE(code, description) { #code, description, DLT_ ## code }
+#define DLT_CHOICE_SENTINEL { NULL, NULL, 0 }
+
+static struct dlt_choice dlt_choices[] = {
+ DLT_CHOICE(NULL, "BSD loopback"),
+ DLT_CHOICE(EN10MB, "Ethernet"),
+ DLT_CHOICE(IEEE802, "Token ring"),
+ DLT_CHOICE(ARCNET, "BSD ARCNET"),
+ DLT_CHOICE(SLIP, "SLIP"),
+ DLT_CHOICE(PPP, "PPP"),
+ DLT_CHOICE(FDDI, "FDDI"),
+ DLT_CHOICE(ATM_RFC1483, "RFC 1483 LLC-encapsulated ATM"),
+ DLT_CHOICE(RAW, "Raw IP"),
+ DLT_CHOICE(SLIP_BSDOS, "BSD/OS SLIP"),
+ DLT_CHOICE(PPP_BSDOS, "BSD/OS PPP"),
+ DLT_CHOICE(ATM_CLIP, "Linux Classical IP over ATM"),
+ DLT_CHOICE(PPP_SERIAL, "PPP over serial"),
+ DLT_CHOICE(PPP_ETHER, "PPPoE"),
+ DLT_CHOICE(SYMANTEC_FIREWALL, "Symantec Firewall"),
+ DLT_CHOICE(C_HDLC, "Cisco HDLC"),
+ DLT_CHOICE(IEEE802_11, "802.11"),
+ DLT_CHOICE(FRELAY, "Frame Relay"),
+ DLT_CHOICE(LOOP, "OpenBSD loopback"),
+ DLT_CHOICE(ENC, "OpenBSD encapsulated IP"),
+ DLT_CHOICE(LINUX_SLL, "Linux cooked v1"),
+ DLT_CHOICE(LTALK, "Localtalk"),
+ DLT_CHOICE(PFLOG, "OpenBSD pflog file"),
+ DLT_CHOICE(PFSYNC, "Packet filter state syncing"),
+ DLT_CHOICE(PRISM_HEADER, "802.11 plus Prism header"),
+ DLT_CHOICE(IP_OVER_FC, "RFC 2625 IP-over-Fibre Channel"),
+ DLT_CHOICE(SUNATM, "Sun raw ATM"),
+ DLT_CHOICE(IEEE802_11_RADIO, "802.11 plus radiotap header"),
+ DLT_CHOICE(ARCNET_LINUX, "Linux ARCNET"),
+ DLT_CHOICE(JUNIPER_MLPPP, "Juniper Multi-Link PPP"),
+ DLT_CHOICE(JUNIPER_MLFR, "Juniper Multi-Link Frame Relay"),
+ DLT_CHOICE(JUNIPER_ES, "Juniper Encryption Services PIC"),
+ DLT_CHOICE(JUNIPER_GGSN, "Juniper GGSN PIC"),
+ DLT_CHOICE(JUNIPER_MFR, "Juniper FRF.16 Frame Relay"),
+ DLT_CHOICE(JUNIPER_ATM2, "Juniper ATM2 PIC"),
+ DLT_CHOICE(JUNIPER_SERVICES, "Juniper Advanced Services PIC"),
+ DLT_CHOICE(JUNIPER_ATM1, "Juniper ATM1 PIC"),
+ DLT_CHOICE(APPLE_IP_OVER_IEEE1394, "Apple IP-over-IEEE 1394"),
+ DLT_CHOICE(MTP2_WITH_PHDR, "SS7 MTP2 with Pseudo-header"),
+ DLT_CHOICE(MTP2, "SS7 MTP2"),
+ DLT_CHOICE(MTP3, "SS7 MTP3"),
+ DLT_CHOICE(SCCP, "SS7 SCCP"),
+ DLT_CHOICE(DOCSIS, "DOCSIS"),
+ DLT_CHOICE(LINUX_IRDA, "Linux IrDA"),
+ DLT_CHOICE(IEEE802_11_RADIO_AVS, "802.11 plus AVS radio information header"),
+ DLT_CHOICE(JUNIPER_MONITOR, "Juniper Passive Monitor PIC"),
+ DLT_CHOICE(BACNET_MS_TP, "BACnet MS/TP"),
+ DLT_CHOICE(PPP_PPPD, "PPP for pppd, with direction flag"),
+ DLT_CHOICE(JUNIPER_PPPOE, "Juniper PPPoE"),
+ DLT_CHOICE(JUNIPER_PPPOE_ATM, "Juniper PPPoE/ATM"),
+ DLT_CHOICE(GPRS_LLC, "GPRS LLC"),
+ DLT_CHOICE(GPF_T, "GPF-T"),
+ DLT_CHOICE(GPF_F, "GPF-F"),
+ DLT_CHOICE(JUNIPER_PIC_PEER, "Juniper PIC Peer"),
+ DLT_CHOICE(ERF_ETH, "Ethernet with Endace ERF header"),
+ DLT_CHOICE(ERF_POS, "Packet-over-SONET with Endace ERF header"),
+ DLT_CHOICE(LINUX_LAPD, "Linux vISDN LAPD"),
+ DLT_CHOICE(JUNIPER_ETHER, "Juniper Ethernet"),
+ DLT_CHOICE(JUNIPER_PPP, "Juniper PPP"),
+ DLT_CHOICE(JUNIPER_FRELAY, "Juniper Frame Relay"),
+ DLT_CHOICE(JUNIPER_CHDLC, "Juniper C-HDLC"),
+ DLT_CHOICE(MFR, "FRF.16 Frame Relay"),
+ DLT_CHOICE(JUNIPER_VP, "Juniper Voice PIC"),
+ DLT_CHOICE(A429, "Arinc 429"),
+ DLT_CHOICE(A653_ICM, "Arinc 653 Interpartition Communication"),
+ DLT_CHOICE(USB_FREEBSD, "USB with FreeBSD header"),
+ DLT_CHOICE(BLUETOOTH_HCI_H4, "Bluetooth HCI UART transport layer"),
+ DLT_CHOICE(IEEE802_16_MAC_CPS, "IEEE 802.16 MAC Common Part Sublayer"),
+ DLT_CHOICE(USB_LINUX, "USB with Linux header"),
+ DLT_CHOICE(CAN20B, "Controller Area Network (CAN) v. 2.0B"),
+ DLT_CHOICE(IEEE802_15_4_LINUX, "IEEE 802.15.4 with Linux padding"),
+ DLT_CHOICE(PPI, "Per-Packet Information"),
+ DLT_CHOICE(IEEE802_16_MAC_CPS_RADIO, "IEEE 802.16 MAC Common Part Sublayer plus radiotap header"),
+ DLT_CHOICE(JUNIPER_ISM, "Juniper Integrated Service Module"),
+ DLT_CHOICE(IEEE802_15_4, "IEEE 802.15.4 with FCS"),
+ DLT_CHOICE(SITA, "SITA pseudo-header"),
+ DLT_CHOICE(ERF, "Endace ERF header"),
+ DLT_CHOICE(RAIF1, "Ethernet with u10 Networks pseudo-header"),
+ DLT_CHOICE(IPMB_KONTRON, "IPMB with Kontron pseudo-header"),
+ DLT_CHOICE(JUNIPER_ST, "Juniper Secure Tunnel"),
+ DLT_CHOICE(BLUETOOTH_HCI_H4_WITH_PHDR, "Bluetooth HCI UART transport layer plus pseudo-header"),
+ DLT_CHOICE(AX25_KISS, "AX.25 with KISS header"),
+ DLT_CHOICE(IPMB_LINUX, "IPMB with Linux/Pigeon Point pseudo-header"),
+ DLT_CHOICE(IEEE802_15_4_NONASK_PHY, "IEEE 802.15.4 with non-ASK PHY data"),
+ DLT_CHOICE(MPLS, "MPLS with label as link-layer header"),
+ DLT_CHOICE(LINUX_EVDEV, "Linux evdev events"),
+ DLT_CHOICE(USB_LINUX_MMAPPED, "USB with padded Linux header"),
+ DLT_CHOICE(DECT, "DECT"),
+ DLT_CHOICE(AOS, "AOS Space Data Link protocol"),
+ DLT_CHOICE(WIHART, "Wireless HART"),
+ DLT_CHOICE(FC_2, "Fibre Channel FC-2"),
+ DLT_CHOICE(FC_2_WITH_FRAME_DELIMS, "Fibre Channel FC-2 with frame delimiters"),
+ DLT_CHOICE(IPNET, "Solaris ipnet"),
+ DLT_CHOICE(CAN_SOCKETCAN, "CAN-bus with SocketCAN headers"),
+ DLT_CHOICE(IPV4, "Raw IPv4"),
+ DLT_CHOICE(IPV6, "Raw IPv6"),
+ DLT_CHOICE(IEEE802_15_4_NOFCS, "IEEE 802.15.4 without FCS"),
+ DLT_CHOICE(DBUS, "D-Bus"),
+ DLT_CHOICE(JUNIPER_VS, "Juniper Virtual Server"),
+ DLT_CHOICE(JUNIPER_SRX_E2E, "Juniper SRX E2E"),
+ DLT_CHOICE(JUNIPER_FIBRECHANNEL, "Juniper Fibre Channel"),
+ DLT_CHOICE(DVB_CI, "DVB-CI"),
+ DLT_CHOICE(MUX27010, "MUX27010"),
+ DLT_CHOICE(STANAG_5066_D_PDU, "STANAG 5066 D_PDUs"),
+ DLT_CHOICE(JUNIPER_ATM_CEMIC, "Juniper ATM CEMIC"),
+ DLT_CHOICE(NFLOG, "Linux netfilter log messages"),
+ DLT_CHOICE(NETANALYZER, "Ethernet with Hilscher netANALYZER pseudo-header"),
+ DLT_CHOICE(NETANALYZER_TRANSPARENT, "Ethernet with Hilscher netANALYZER pseudo-header and with preamble and SFD"),
+ DLT_CHOICE(IPOIB, "RFC 4391 IP-over-Infiniband"),
+ DLT_CHOICE(MPEG_2_TS, "MPEG-2 transport stream"),
+ DLT_CHOICE(NG40, "ng40 protocol tester Iub/Iur"),
+ DLT_CHOICE(NFC_LLCP, "NFC LLCP PDUs with pseudo-header"),
+ DLT_CHOICE(INFINIBAND, "InfiniBand"),
+ DLT_CHOICE(SCTP, "SCTP"),
+ DLT_CHOICE(USBPCAP, "USB with USBPcap header"),
+ DLT_CHOICE(RTAC_SERIAL, "Schweitzer Engineering Laboratories RTAC packets"),
+ DLT_CHOICE(BLUETOOTH_LE_LL, "Bluetooth Low Energy air interface"),
+ DLT_CHOICE(NETLINK, "Linux netlink"),
+ DLT_CHOICE(BLUETOOTH_LINUX_MONITOR, "Bluetooth Linux Monitor"),
+ DLT_CHOICE(BLUETOOTH_BREDR_BB, "Bluetooth Basic Rate/Enhanced Data Rate baseband packets"),
+ DLT_CHOICE(BLUETOOTH_LE_LL_WITH_PHDR, "Bluetooth Low Energy air interface with pseudo-header"),
+ DLT_CHOICE(PROFIBUS_DL, "PROFIBUS data link layer"),
+ DLT_CHOICE(PKTAP, "Apple DLT_PKTAP"),
+ DLT_CHOICE(EPON, "Ethernet with 802.3 Clause 65 EPON preamble"),
+ DLT_CHOICE(IPMI_HPM_2, "IPMI trace packets"),
+ DLT_CHOICE(ZWAVE_R1_R2, "Z-Wave RF profile R1 and R2 packets"),
+ DLT_CHOICE(ZWAVE_R3, "Z-Wave RF profile R3 packets"),
+ DLT_CHOICE(WATTSTOPPER_DLM, "WattStopper Digital Lighting Management (DLM) and Legrand Nitoo Open protocol"),
+ DLT_CHOICE(ISO_14443, "ISO 14443 messages"),
+ DLT_CHOICE(RDS, "IEC 62106 Radio Data System groups"),
+ DLT_CHOICE(USB_DARWIN, "USB with Darwin header"),
+ DLT_CHOICE(OPENFLOW, "OpenBSD DLT_OPENFLOW"),
+ DLT_CHOICE(SDLC, "IBM SDLC frames"),
+ DLT_CHOICE(TI_LLN_SNIFFER, "TI LLN sniffer frames"),
+ DLT_CHOICE(VSOCK, "Linux vsock"),
+ DLT_CHOICE(NORDIC_BLE, "Nordic Semiconductor Bluetooth LE sniffer frames"),
+ DLT_CHOICE(DOCSIS31_XRA31, "Excentis XRA-31 DOCSIS 3.1 RF sniffer frames"),
+ DLT_CHOICE(ETHERNET_MPACKET, "802.3br mPackets"),
+ DLT_CHOICE(DISPLAYPORT_AUX, "DisplayPort AUX channel monitoring data"),
+ DLT_CHOICE(LINUX_SLL2, "Linux cooked v2"),
+ DLT_CHOICE(OPENVIZSLA, "OpenVizsla USB"),
+ DLT_CHOICE(EBHSCR, "Elektrobit High Speed Capture and Replay (EBHSCR)"),
+ DLT_CHOICE(VPP_DISPATCH, "VPP graph dispatch tracer"),
+ DLT_CHOICE(DSA_TAG_BRCM, "Broadcom tag"),
+ DLT_CHOICE(DSA_TAG_BRCM_PREPEND, "Broadcom tag (prepended)"),
+ DLT_CHOICE(IEEE802_15_4_TAP, "IEEE 802.15.4 with pseudo-header"),
+ DLT_CHOICE(DSA_TAG_DSA, "Marvell DSA"),
+ DLT_CHOICE(DSA_TAG_EDSA, "Marvell EDSA"),
+ DLT_CHOICE(ELEE, "ELEE lawful intercept packets"),
+ DLT_CHOICE(Z_WAVE_SERIAL, "Z-Wave serial frames between host and chip"),
+ DLT_CHOICE(USB_2_0, "USB 2.0/1.1/1.0 as transmitted over the cable"),
+ DLT_CHOICE(ATSC_ALP, "ATSC Link-Layer Protocol packets"),
+ DLT_CHOICE_SENTINEL
+};
+
+int
+pcap_datalink_name_to_val(const char *name)
+{
+ int i;
+
+ for (i = 0; dlt_choices[i].name != NULL; i++) {
+ if (pcap_strcasecmp(dlt_choices[i].name, name) == 0)
+ return (dlt_choices[i].dlt);
+ }
+ return (-1);
+}
+
+const char *
+pcap_datalink_val_to_name(int dlt)
+{
+ int i;
+
+ for (i = 0; dlt_choices[i].name != NULL; i++) {
+ if (dlt_choices[i].dlt == dlt)
+ return (dlt_choices[i].name);
+ }
+ return (NULL);
+}
+
+const char *
+pcap_datalink_val_to_description(int dlt)
+{
+ int i;
+
+ for (i = 0; dlt_choices[i].name != NULL; i++) {
+ if (dlt_choices[i].dlt == dlt)
+ return (dlt_choices[i].description);
+ }
+ return (NULL);
+}
+
+const char *
+pcap_datalink_val_to_description_or_dlt(int dlt)
+{
+ static char unkbuf[40];
+ const char *description;
+
+ description = pcap_datalink_val_to_description(dlt);
+ if (description != NULL) {
+ return description;
+ } else {
+ (void)snprintf(unkbuf, sizeof(unkbuf), "DLT %d", dlt);
+ return unkbuf;
+ }
+}
+
+struct tstamp_type_choice {
+ const char *name;
+ const char *description;
+ int type;
+};
+
+static struct tstamp_type_choice tstamp_type_choices[] = {
+ { "host", "Host", PCAP_TSTAMP_HOST },
+ { "host_lowprec", "Host, low precision", PCAP_TSTAMP_HOST_LOWPREC },
+ { "host_hiprec", "Host, high precision", PCAP_TSTAMP_HOST_HIPREC },
+ { "adapter", "Adapter", PCAP_TSTAMP_ADAPTER },
+ { "adapter_unsynced", "Adapter, not synced with system time", PCAP_TSTAMP_ADAPTER_UNSYNCED },
+ { "host_hiprec_unsynced", "Host, high precision, not synced with system time", PCAP_TSTAMP_HOST_HIPREC_UNSYNCED },
+ { NULL, NULL, 0 }
+};
+
+int
+pcap_tstamp_type_name_to_val(const char *name)
+{
+ int i;
+
+ for (i = 0; tstamp_type_choices[i].name != NULL; i++) {
+ if (pcap_strcasecmp(tstamp_type_choices[i].name, name) == 0)
+ return (tstamp_type_choices[i].type);
+ }
+ return (PCAP_ERROR);
+}
+
+const char *
+pcap_tstamp_type_val_to_name(int tstamp_type)
+{
+ int i;
+
+ for (i = 0; tstamp_type_choices[i].name != NULL; i++) {
+ if (tstamp_type_choices[i].type == tstamp_type)
+ return (tstamp_type_choices[i].name);
+ }
+ return (NULL);
+}
+
+const char *
+pcap_tstamp_type_val_to_description(int tstamp_type)
+{
+ int i;
+
+ for (i = 0; tstamp_type_choices[i].name != NULL; i++) {
+ if (tstamp_type_choices[i].type == tstamp_type)
+ return (tstamp_type_choices[i].description);
+ }
+ return (NULL);
+}
+
+int
+pcap_snapshot(pcap_t *p)
+{
+ if (!p->activated)
+ return (PCAP_ERROR_NOT_ACTIVATED);
+ return (p->snapshot);
+}
+
+int
+pcap_is_swapped(pcap_t *p)
+{
+ if (!p->activated)
+ return (PCAP_ERROR_NOT_ACTIVATED);
+ return (p->swapped);
+}
+
+int
+pcap_major_version(pcap_t *p)
+{
+ if (!p->activated)
+ return (PCAP_ERROR_NOT_ACTIVATED);
+ return (p->version_major);
+}
+
+int
+pcap_minor_version(pcap_t *p)
+{
+ if (!p->activated)
+ return (PCAP_ERROR_NOT_ACTIVATED);
+ return (p->version_minor);
+}
+
+int
+pcap_bufsize(pcap_t *p)
+{
+ if (!p->activated)
+ return (PCAP_ERROR_NOT_ACTIVATED);
+ return (p->bufsize);
+}
+
+FILE *
+pcap_file(pcap_t *p)
+{
+ return (p->rfile);
+}
+
+#ifdef _WIN32
+int
+pcap_fileno(pcap_t *p)
+{
+ if (p->handle != INVALID_HANDLE_VALUE) {
+ /*
+ * This is a bogus and now-deprecated API; we
+ * squelch the narrowing warning for the cast
+ * from HANDLE to intptr_t. If Windows programmmers
+ * need to get at the HANDLE for a pcap_t, *if*
+ * there is one, they should request such a
+ * routine (and be prepared for it to return
+ * INVALID_HANDLE_VALUE).
+ */
+DIAG_OFF_NARROWING
+ return ((int)(intptr_t)p->handle);
+DIAG_ON_NARROWING
+ } else
+ return (PCAP_ERROR);
+}
+#else /* _WIN32 */
+int
+pcap_fileno(pcap_t *p)
+{
+ return (p->fd);
+}
+#endif /* _WIN32 */
+
+#if !defined(_WIN32) && !defined(MSDOS)
+int
+pcap_get_selectable_fd(pcap_t *p)
+{
+ return (p->selectable_fd);
+}
+
+const struct timeval *
+pcap_get_required_select_timeout(pcap_t *p)
+{
+ return (p->required_select_timeout);
+}
+#endif
+
+void
+pcap_perror(pcap_t *p, const char *prefix)
+{
+ fprintf(stderr, "%s: %s\n", prefix, p->errbuf);
+}
+
+char *
+pcap_geterr(pcap_t *p)
+{
+ return (p->errbuf);
+}
+
+int
+pcap_getnonblock(pcap_t *p, char *errbuf)
+{
+ int ret;
+
+ ret = p->getnonblock_op(p);
+ if (ret == -1) {
+ /*
+ * The get nonblock operation sets p->errbuf; this
+ * function *shouldn't* have had a separate errbuf
+ * argument, as it didn't need one, but I goofed
+ * when adding it.
+ *
+ * We copy the error message to errbuf, so callers
+ * can find it in either place.
+ */
+ pcap_strlcpy(errbuf, p->errbuf, PCAP_ERRBUF_SIZE);
+ }
+ return (ret);
+}
+
+/*
+ * Get the current non-blocking mode setting, under the assumption that
+ * it's just the standard POSIX non-blocking flag.
+ */
+#if !defined(_WIN32) && !defined(MSDOS)
+int
+pcap_getnonblock_fd(pcap_t *p)
+{
+ int fdflags;
+
+ fdflags = fcntl(p->fd, F_GETFL, 0);
+ if (fdflags == -1) {
+ pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
+ errno, "F_GETFL");
+ return (-1);
+ }
+ if (fdflags & O_NONBLOCK)
+ return (1);
+ else
+ return (0);
+}
+#endif
+
+int
+pcap_setnonblock(pcap_t *p, int nonblock, char *errbuf)
+{
+ int ret;
-static struct dlt_choice dlt_choices[] = {
- DLT_CHOICE(DLT_NULL, "BSD loopback"),
- DLT_CHOICE(DLT_EN10MB, "Ethernet"),
- DLT_CHOICE(DLT_IEEE802, "Token ring"),
- DLT_CHOICE(DLT_ARCNET, "BSD ARCNET"),
- DLT_CHOICE(DLT_SLIP, "SLIP"),
- DLT_CHOICE(DLT_PPP, "PPP"),
- DLT_CHOICE(DLT_FDDI, "FDDI"),
- DLT_CHOICE(DLT_ATM_RFC1483, "RFC 1483 LLC-encapsulated ATM"),
- DLT_CHOICE(DLT_RAW, "Raw IP"),
- DLT_CHOICE(DLT_SLIP_BSDOS, "BSD/OS SLIP"),
- DLT_CHOICE(DLT_PPP_BSDOS, "BSD/OS PPP"),
- DLT_CHOICE(DLT_ATM_CLIP, "Linux Classical IP-over-ATM"),
- DLT_CHOICE(DLT_PPP_SERIAL, "PPP over serial"),
- DLT_CHOICE(DLT_PPP_ETHER, "PPPoE"),
- DLT_CHOICE(DLT_SYMANTEC_FIREWALL, "Symantec Firewall"),
- DLT_CHOICE(DLT_C_HDLC, "Cisco HDLC"),
- DLT_CHOICE(DLT_IEEE802_11, "802.11"),
- DLT_CHOICE(DLT_FRELAY, "Frame Relay"),
- DLT_CHOICE(DLT_LOOP, "OpenBSD loopback"),
- DLT_CHOICE(DLT_ENC, "OpenBSD encapsulated IP"),
- DLT_CHOICE(DLT_LINUX_SLL, "Linux cooked"),
- DLT_CHOICE(DLT_LTALK, "Localtalk"),
- DLT_CHOICE(DLT_PFLOG, "OpenBSD pflog file"),
- DLT_CHOICE(DLT_PFSYNC, "Packet filter state syncing"),
- DLT_CHOICE(DLT_PRISM_HEADER, "802.11 plus Prism header"),
- DLT_CHOICE(DLT_IP_OVER_FC, "RFC 2625 IP-over-Fibre Channel"),
- DLT_CHOICE(DLT_SUNATM, "Sun raw ATM"),
- DLT_CHOICE(DLT_IEEE802_11_RADIO, "802.11 plus radiotap header"),
- DLT_CHOICE(DLT_ARCNET_LINUX, "Linux ARCNET"),
- DLT_CHOICE(DLT_JUNIPER_MLPPP, "Juniper Multi-Link PPP"),
- DLT_CHOICE(DLT_JUNIPER_MLFR, "Juniper Multi-Link Frame Relay"),
- DLT_CHOICE(DLT_JUNIPER_ES, "Juniper Encryption Services PIC"),
- DLT_CHOICE(DLT_JUNIPER_GGSN, "Juniper GGSN PIC"),
- DLT_CHOICE(DLT_JUNIPER_MFR, "Juniper FRF.16 Frame Relay"),
- DLT_CHOICE(DLT_JUNIPER_ATM2, "Juniper ATM2 PIC"),
- DLT_CHOICE(DLT_JUNIPER_SERVICES, "Juniper Advanced Services PIC"),
- DLT_CHOICE(DLT_JUNIPER_ATM1, "Juniper ATM1 PIC"),
- DLT_CHOICE(DLT_APPLE_IP_OVER_IEEE1394, "Apple IP-over-IEEE 1394"),
- DLT_CHOICE(DLT_MTP2_WITH_PHDR, "SS7 MTP2 with Pseudo-header"),
- DLT_CHOICE(DLT_MTP2, "SS7 MTP2"),
- DLT_CHOICE(DLT_MTP3, "SS7 MTP3"),
- DLT_CHOICE(DLT_SCCP, "SS7 SCCP"),
- DLT_CHOICE(DLT_DOCSIS, "DOCSIS"),
- DLT_CHOICE(DLT_LINUX_IRDA, "Linux IrDA"),
- DLT_CHOICE(DLT_IEEE802_11_RADIO_AVS, "802.11 plus AVS radio information header"),
- DLT_CHOICE(DLT_JUNIPER_MONITOR, "Juniper Passive Monitor PIC"),
- DLT_CHOICE(DLT_BACNET_MS_TP, "BACnet MS/TP"),
- DLT_CHOICE(DLT_PPP_PPPD, "PPP for pppd, with direction flag"),
- DLT_CHOICE(DLT_JUNIPER_PPPOE, "Juniper PPPoE"),
- DLT_CHOICE(DLT_JUNIPER_PPPOE_ATM, "Juniper PPPoE/ATM"),
- DLT_CHOICE(DLT_GPRS_LLC, "GPRS LLC"),
- DLT_CHOICE(DLT_GPF_T, "GPF-T"),
- DLT_CHOICE(DLT_GPF_F, "GPF-F"),
- DLT_CHOICE(DLT_JUNIPER_PIC_PEER, "Juniper PIC Peer"),
- DLT_CHOICE(DLT_ERF_ETH, "Ethernet with Endace ERF header"),
- DLT_CHOICE(DLT_ERF_POS, "Packet-over-SONET with Endace ERF header"),
- DLT_CHOICE(DLT_LINUX_LAPD, "Linux vISDN LAPD"),
- DLT_CHOICE(DLT_JUNIPER_ETHER, "Juniper Ethernet"),
- DLT_CHOICE(DLT_JUNIPER_PPP, "Juniper PPP"),
- DLT_CHOICE(DLT_JUNIPER_FRELAY, "Juniper Frame Relay"),
- DLT_CHOICE(DLT_JUNIPER_CHDLC, "Juniper C-HDLC"),
- DLT_CHOICE(DLT_MFR, "FRF.16 Frame Relay"),
- DLT_CHOICE(DLT_JUNIPER_VP, "Juniper Voice PIC"),
- DLT_CHOICE(DLT_A429, "Arinc 429"),
- DLT_CHOICE(DLT_A653_ICM, "Arinc 653 Interpartition Communication"),
- DLT_CHOICE(DLT_USB_FREEBSD, "USB with FreeBSD header"),
- DLT_CHOICE(DLT_BLUETOOTH_HCI_H4, "Bluetooth HCI UART transport layer"),
- DLT_CHOICE(DLT_IEEE802_16_MAC_CPS, "IEEE 802.16 MAC Common Part Sublayer"),
- DLT_CHOICE(DLT_USB_LINUX, "USB with Linux header"),
- DLT_CHOICE(DLT_CAN20B, "Controller Area Network (CAN) v. 2.0B"),
- DLT_CHOICE(DLT_IEEE802_15_4_LINUX, "IEEE 802.15.4 with Linux padding"),
- DLT_CHOICE(DLT_PPI, "Per-Packet Information"),
- DLT_CHOICE(DLT_IEEE802_16_MAC_CPS_RADIO, "IEEE 802.16 MAC Common Part Sublayer plus radiotap header"),
- DLT_CHOICE(DLT_JUNIPER_ISM, "Juniper Integrated Service Module"),
- DLT_CHOICE(DLT_IEEE802_15_4, "IEEE 802.15.4 with FCS"),
- DLT_CHOICE(DLT_SITA, "SITA pseudo-header"),
- DLT_CHOICE(DLT_ERF, "Endace ERF header"),
- DLT_CHOICE(DLT_RAIF1, "Ethernet with u10 Networks pseudo-header"),
- DLT_CHOICE(DLT_IPMB, "IPMB"),
- DLT_CHOICE(DLT_JUNIPER_ST, "Juniper Secure Tunnel"),
- DLT_CHOICE(DLT_BLUETOOTH_HCI_H4_WITH_PHDR, "Bluetooth HCI UART transport layer plus pseudo-header"),
- DLT_CHOICE(DLT_AX25_KISS, "AX.25 with KISS header"),
- DLT_CHOICE(DLT_IEEE802_15_4_NONASK_PHY, "IEEE 802.15.4 with non-ASK PHY data"),
- DLT_CHOICE(DLT_MPLS, "MPLS with label as link-layer header"),
- DLT_CHOICE(DLT_LINUX_EVDEV, "Linux evdev events"),
- DLT_CHOICE(DLT_USB_LINUX_MMAPPED, "USB with padded Linux header"),
- DLT_CHOICE(DLT_DECT, "DECT"),
- DLT_CHOICE(DLT_AOS, "AOS Space Data Link protocol"),
- DLT_CHOICE(DLT_WIHART, "Wireless HART"),
- DLT_CHOICE(DLT_FC_2, "Fibre Channel FC-2"),
- DLT_CHOICE(DLT_FC_2_WITH_FRAME_DELIMS, "Fibre Channel FC-2 with frame delimiters"),
- DLT_CHOICE(DLT_IPNET, "Solaris ipnet"),
- DLT_CHOICE(DLT_CAN_SOCKETCAN, "CAN-bus with SocketCAN headers"),
- DLT_CHOICE(DLT_IPV4, "Raw IPv4"),
- DLT_CHOICE(DLT_IPV6, "Raw IPv6"),
- DLT_CHOICE(DLT_IEEE802_15_4_NOFCS, "IEEE 802.15.4 without FCS"),
- DLT_CHOICE(DLT_DBUS, "D-Bus"),
- DLT_CHOICE(DLT_JUNIPER_VS, "Juniper Virtual Server"),
- DLT_CHOICE(DLT_JUNIPER_SRX_E2E, "Juniper SRX E2E"),
- DLT_CHOICE(DLT_JUNIPER_FIBRECHANNEL, "Juniper Fibre Channel"),
- DLT_CHOICE(DLT_DVB_CI, "DVB-CI"),
- DLT_CHOICE(DLT_MUX27010, "MUX27010"),
- DLT_CHOICE(DLT_STANAG_5066_D_PDU, "STANAG 5066 D_PDUs"),
- DLT_CHOICE(DLT_JUNIPER_ATM_CEMIC, "Juniper ATM CEMIC"),
- DLT_CHOICE(DLT_NFLOG, "Linux netfilter log messages"),
- DLT_CHOICE(DLT_NETANALYZER, "Ethernet with Hilscher netANALYZER pseudo-header"),
- DLT_CHOICE(DLT_NETANALYZER_TRANSPARENT, "Ethernet with Hilscher netANALYZER pseudo-header and with preamble and SFD"),
- DLT_CHOICE(DLT_IPOIB, "RFC 4391 IP-over-Infiniband"),
- DLT_CHOICE(DLT_MPEG_2_TS, "MPEG-2 transport stream"),
- DLT_CHOICE(DLT_NG40, "ng40 protocol tester Iub/Iur"),
- DLT_CHOICE(DLT_NFC_LLCP, "NFC LLCP PDUs with pseudo-header"),
- DLT_CHOICE(DLT_INFINIBAND, "InfiniBand"),
- DLT_CHOICE(DLT_SCTP, "SCTP"),
- DLT_CHOICE(DLT_USBPCAP, "USB with USBPcap header"),
- DLT_CHOICE(DLT_RTAC_SERIAL, "Schweitzer Engineering Laboratories RTAC packets"),
- DLT_CHOICE(DLT_BLUETOOTH_LE_LL, "Bluetooth Low Energy air interface"),
- DLT_CHOICE(DLT_NETLINK, "Linux netlink"),
- DLT_CHOICE(DLT_BLUETOOTH_LINUX_MONITOR, "Bluetooth Linux Monitor"),
- DLT_CHOICE(DLT_BLUETOOTH_BREDR_BB, "Bluetooth Basic Rate/Enhanced Data Rate baseband packets"),
- DLT_CHOICE(DLT_BLUETOOTH_LE_LL_WITH_PHDR, "Bluetooth Low Energy air interface with pseudo-header"),
- DLT_CHOICE(DLT_PROFIBUS_DL, "PROFIBUS data link layer"),
- DLT_CHOICE(DLT_PKTAP, "Apple DLT_PKTAP"),
- DLT_CHOICE(DLT_EPON, "Ethernet with 802.3 Clause 65 EPON preamble"),
- DLT_CHOICE_SENTINEL
-};
+ ret = p->setnonblock_op(p, nonblock);
+ if (ret == -1) {
+ /*
+ * The set nonblock operation sets p->errbuf; this
+ * function *shouldn't* have had a separate errbuf
+ * argument, as it didn't need one, but I goofed
+ * when adding it.
+ *
+ * We copy the error message to errbuf, so callers
+ * can find it in either place.
+ */
+ pcap_strlcpy(errbuf, p->errbuf, PCAP_ERRBUF_SIZE);
+ }
+ return (ret);
+}
+#if !defined(_WIN32) && !defined(MSDOS)
+/*
+ * Set non-blocking mode, under the assumption that it's just the
+ * standard POSIX non-blocking flag. (This can be called by the
+ * per-platform non-blocking-mode routine if that routine also
+ * needs to do some additional work.)
+ */
int
-pcap_datalink_name_to_val(const char *name)
+pcap_setnonblock_fd(pcap_t *p, int nonblock)
{
- int i;
+ int fdflags;
- for (i = 0; dlt_choices[i].name != NULL; i++) {
- if (pcap_strcasecmp(dlt_choices[i].name + sizeof("DLT_") - 1,
- name) == 0)
- return (dlt_choices[i].dlt);
+ fdflags = fcntl(p->fd, F_GETFL, 0);
+ if (fdflags == -1) {
+ pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
+ errno, "F_GETFL");
+ return (-1);
}
- return (-1);
+ if (nonblock)
+ fdflags |= O_NONBLOCK;
+ else
+ fdflags &= ~O_NONBLOCK;
+ if (fcntl(p->fd, F_SETFL, fdflags) == -1) {
+ pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
+ errno, "F_SETFL");
+ return (-1);
+ }
+ return (0);
}
+#endif
+/*
+ * Generate error strings for PCAP_ERROR_ and PCAP_WARNING_ values.
+ */
const char *
-pcap_datalink_val_to_name(int dlt)
+pcap_statustostr(int errnum)
{
- int i;
+ static char ebuf[15+10+1];
- for (i = 0; dlt_choices[i].name != NULL; i++) {
- if (dlt_choices[i].dlt == dlt)
- return (dlt_choices[i].name + sizeof("DLT_") - 1);
+ switch (errnum) {
+
+ case PCAP_WARNING:
+ return("Generic warning");
+
+ case PCAP_WARNING_TSTAMP_TYPE_NOTSUP:
+ return ("That type of time stamp is not supported by that device");
+
+ case PCAP_WARNING_PROMISC_NOTSUP:
+ return ("That device doesn't support promiscuous mode");
+
+ case PCAP_ERROR:
+ return("Generic error");
+
+ case PCAP_ERROR_BREAK:
+ return("Loop terminated by pcap_breakloop");
+
+ case PCAP_ERROR_NOT_ACTIVATED:
+ return("The pcap_t has not been activated");
+
+ case PCAP_ERROR_ACTIVATED:
+ return ("The setting can't be changed after the pcap_t is activated");
+
+ case PCAP_ERROR_NO_SUCH_DEVICE:
+ return ("No such device exists");
+
+ case PCAP_ERROR_RFMON_NOTSUP:
+ return ("That device doesn't support monitor mode");
+
+ case PCAP_ERROR_NOT_RFMON:
+ return ("That operation is supported only in monitor mode");
+
+ case PCAP_ERROR_PERM_DENIED:
+ return ("You don't have permission to perform this capture on that device");
+
+ case PCAP_ERROR_IFACE_NOT_UP:
+ return ("That device is not up");
+
+ case PCAP_ERROR_CANTSET_TSTAMP_TYPE:
+ return ("That device doesn't support setting the time stamp type");
+
+ case PCAP_ERROR_PROMISC_PERM_DENIED:
+ return ("You don't have permission to capture in promiscuous mode on that device");
+
+ case PCAP_ERROR_TSTAMP_PRECISION_NOTSUP:
+ return ("That device doesn't support that time stamp precision");
}
- return (NULL);
+ (void)snprintf(ebuf, sizeof ebuf, "Unknown error: %d", errnum);
+ return(ebuf);
}
+/*
+ * Not all systems have strerror().
+ */
const char *
-pcap_datalink_val_to_description(int dlt)
+pcap_strerror(int errnum)
{
- int i;
+#ifdef HAVE_STRERROR
+#ifdef _WIN32
+ static char errbuf[PCAP_ERRBUF_SIZE];
+ errno_t err = strerror_s(errbuf, PCAP_ERRBUF_SIZE, errnum);
- for (i = 0; dlt_choices[i].name != NULL; i++) {
- if (dlt_choices[i].dlt == dlt)
- return (dlt_choices[i].description);
- }
- return (NULL);
-}
+ if (err != 0) /* err = 0 if successful */
+ pcap_strlcpy(errbuf, "strerror_s() error", PCAP_ERRBUF_SIZE);
+ return (errbuf);
+#else
+ return (strerror(errnum));
+#endif /* _WIN32 */
+#else
+ extern int sys_nerr;
+ extern const char *const sys_errlist[];
+ static char errbuf[PCAP_ERRBUF_SIZE];
-struct tstamp_type_choice {
- const char *name;
- const char *description;
- int type;
-};
+ if ((unsigned int)errnum < sys_nerr)
+ return ((char *)sys_errlist[errnum]);
+ (void)snprintf(errbuf, sizeof errbuf, "Unknown error: %d", errnum);
+ return (errbuf);
+#endif
+}
-static struct tstamp_type_choice tstamp_type_choices[] = {
- { "host", "Host", PCAP_TSTAMP_HOST },
- { "host_lowprec", "Host, low precision", PCAP_TSTAMP_HOST_LOWPREC },
- { "host_hiprec", "Host, high precision", PCAP_TSTAMP_HOST_HIPREC },
- { "adapter", "Adapter", PCAP_TSTAMP_ADAPTER },
- { "adapter_unsynced", "Adapter, not synced with system time", PCAP_TSTAMP_ADAPTER_UNSYNCED },
- { NULL, NULL, 0 }
-};
+int
+pcap_setfilter(pcap_t *p, struct bpf_program *fp)
+{
+ return (p->setfilter_op(p, fp));
+}
+/*
+ * Set direction flag, which controls whether we accept only incoming
+ * packets, only outgoing packets, or both.
+ * Note that, depending on the platform, some or all direction arguments
+ * might not be supported.
+ */
int
-pcap_tstamp_type_name_to_val(const char *name)
+pcap_setdirection(pcap_t *p, pcap_direction_t d)
{
- int i;
+ if (p->setdirection_op == NULL) {
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Setting direction is not supported on this device");
+ return (-1);
+ } else {
+ switch (d) {
- for (i = 0; tstamp_type_choices[i].name != NULL; i++) {
- if (pcap_strcasecmp(tstamp_type_choices[i].name, name) == 0)
- return (tstamp_type_choices[i].type);
+ case PCAP_D_IN:
+ case PCAP_D_OUT:
+ case PCAP_D_INOUT:
+ /*
+ * Valid direction.
+ */
+ return (p->setdirection_op(p, d));
+
+ default:
+ /*
+ * Invalid direction.
+ */
+ snprintf(p->errbuf, sizeof(p->errbuf),
+ "Invalid direction");
+ return (-1);
+ }
}
- return (PCAP_ERROR);
}
-const char *
-pcap_tstamp_type_val_to_name(int tstamp_type)
+int
+pcap_stats(pcap_t *p, struct pcap_stat *ps)
{
- int i;
-
- for (i = 0; tstamp_type_choices[i].name != NULL; i++) {
- if (tstamp_type_choices[i].type == tstamp_type)
- return (tstamp_type_choices[i].name);
- }
- return (NULL);
+ return (p->stats_op(p, ps));
}
-const char *
-pcap_tstamp_type_val_to_description(int tstamp_type)
+#ifdef _WIN32
+struct pcap_stat *
+pcap_stats_ex(pcap_t *p, int *pcap_stat_size)
{
- int i;
+ return (p->stats_ex_op(p, pcap_stat_size));
+}
- for (i = 0; tstamp_type_choices[i].name != NULL; i++) {
- if (tstamp_type_choices[i].type == tstamp_type)
- return (tstamp_type_choices[i].description);
- }
- return (NULL);
+int
+pcap_setbuff(pcap_t *p, int dim)
+{
+ return (p->setbuff_op(p, dim));
}
int
-pcap_snapshot(pcap_t *p)
+pcap_setmode(pcap_t *p, int mode)
{
- if (!p->activated)
- return (PCAP_ERROR_NOT_ACTIVATED);
- return (p->snapshot);
+ return (p->setmode_op(p, mode));
}
int
-pcap_is_swapped(pcap_t *p)
+pcap_setmintocopy(pcap_t *p, int size)
{
- if (!p->activated)
- return (PCAP_ERROR_NOT_ACTIVATED);
- return (p->swapped);
+ return (p->setmintocopy_op(p, size));
+}
+
+HANDLE
+pcap_getevent(pcap_t *p)
+{
+ return (p->getevent_op(p));
}
int
-pcap_major_version(pcap_t *p)
+pcap_oid_get_request(pcap_t *p, bpf_u_int32 oid, void *data, size_t *lenp)
{
- if (!p->activated)
- return (PCAP_ERROR_NOT_ACTIVATED);
- return (p->version_major);
+ return (p->oid_get_request_op(p, oid, data, lenp));
}
int
-pcap_minor_version(pcap_t *p)
+pcap_oid_set_request(pcap_t *p, bpf_u_int32 oid, const void *data, size_t *lenp)
{
- if (!p->activated)
- return (PCAP_ERROR_NOT_ACTIVATED);
- return (p->version_minor);
+ return (p->oid_set_request_op(p, oid, data, lenp));
}
-FILE *
-pcap_file(pcap_t *p)
+pcap_send_queue *
+pcap_sendqueue_alloc(u_int memsize)
{
- return (p->rfile);
+ pcap_send_queue *tqueue;
+
+ /* Allocate the queue */
+ tqueue = (pcap_send_queue *)malloc(sizeof(pcap_send_queue));
+ if (tqueue == NULL){
+ return (NULL);
+ }
+
+ /* Allocate the buffer */
+ tqueue->buffer = (char *)malloc(memsize);
+ if (tqueue->buffer == NULL) {
+ free(tqueue);
+ return (NULL);
+ }
+
+ tqueue->maxlen = memsize;
+ tqueue->len = 0;
+
+ return (tqueue);
}
-int
-pcap_fileno(pcap_t *p)
+void
+pcap_sendqueue_destroy(pcap_send_queue *queue)
{
-#ifndef _WIN32
- return (p->fd);
-#else
- if (p->adapter != NULL)
- return ((int)(DWORD)p->adapter->hFile);
- else
- return (PCAP_ERROR);
-#endif
+ free(queue->buffer);
+ free(queue);
}
-#if !defined(_WIN32) && !defined(MSDOS)
int
-pcap_get_selectable_fd(pcap_t *p)
+pcap_sendqueue_queue(pcap_send_queue *queue, const struct pcap_pkthdr *pkt_header, const u_char *pkt_data)
{
- return (p->selectable_fd);
+ if (queue->len + sizeof(struct pcap_pkthdr) + pkt_header->caplen > queue->maxlen){
+ return (-1);
+ }
+
+ /* Copy the pcap_pkthdr header*/
+ memcpy(queue->buffer + queue->len, pkt_header, sizeof(struct pcap_pkthdr));
+ queue->len += sizeof(struct pcap_pkthdr);
+
+ /* copy the packet */
+ memcpy(queue->buffer + queue->len, pkt_data, pkt_header->caplen);
+ queue->len += pkt_header->caplen;
+
+ return (0);
}
-#endif
-void
-pcap_perror(pcap_t *p, const char *prefix)
+u_int
+pcap_sendqueue_transmit(pcap_t *p, pcap_send_queue *queue, int sync)
{
- fprintf(stderr, "%s: %s\n", prefix, p->errbuf);
+ return (p->sendqueue_transmit_op(p, queue, sync));
}
-char *
-pcap_geterr(pcap_t *p)
+int
+pcap_setuserbuffer(pcap_t *p, int size)
{
- return (p->errbuf);
+ return (p->setuserbuffer_op(p, size));
}
int
-pcap_getnonblock(pcap_t *p, char *errbuf)
+pcap_live_dump(pcap_t *p, char *filename, int maxsize, int maxpacks)
{
- int ret;
-
- ret = p->getnonblock_op(p, errbuf);
- if (ret == -1) {
- /*
- * In case somebody depended on the bug wherein
- * the error message was put into p->errbuf
- * by pcap_getnonblock_fd().
- */
- strlcpy(p->errbuf, errbuf, PCAP_ERRBUF_SIZE);
- }
- return (ret);
+ return (p->live_dump_op(p, filename, maxsize, maxpacks));
}
-/*
- * Get the current non-blocking mode setting, under the assumption that
- * it's just the standard POSIX non-blocking flag.
- */
-#if !defined(_WIN32) && !defined(MSDOS)
int
-pcap_getnonblock_fd(pcap_t *p, char *errbuf)
+pcap_live_dump_ended(pcap_t *p, int sync)
{
- int fdflags;
-
- fdflags = fcntl(p->fd, F_GETFL, 0);
- if (fdflags == -1) {
- pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "F_GETFL: %s",
- pcap_strerror(errno));
- return (-1);
- }
- if (fdflags & O_NONBLOCK)
- return (1);
- else
- return (0);
+ return (p->live_dump_ended_op(p, sync));
}
-#endif
-int
-pcap_setnonblock(pcap_t *p, int nonblock, char *errbuf)
+PAirpcapHandle
+pcap_get_airpcap_handle(pcap_t *p)
{
- int ret;
+ PAirpcapHandle handle;
- ret = p->setnonblock_op(p, nonblock, errbuf);
- if (ret == -1) {
- /*
- * In case somebody depended on the bug wherein
- * the error message was put into p->errbuf
- * by pcap_setnonblock_fd().
- */
- strlcpy(p->errbuf, errbuf, PCAP_ERRBUF_SIZE);
+ handle = p->get_airpcap_handle_op(p);
+ if (handle == NULL) {
+ (void)snprintf(p->errbuf, sizeof(p->errbuf),
+ "This isn't an AirPcap device");
}
- return (ret);
+ return (handle);
}
+#endif
-#if !defined(_WIN32) && !defined(MSDOS)
/*
- * Set non-blocking mode, under the assumption that it's just the
- * standard POSIX non-blocking flag. (This can be called by the
- * per-platform non-blocking-mode routine if that routine also
- * needs to do some additional work.)
+ * On some platforms, we need to clean up promiscuous or monitor mode
+ * when we close a device - and we want that to happen even if the
+ * application just exits without explicitl closing devices.
+ * On those platforms, we need to register a "close all the pcaps"
+ * routine to be called when we exit, and need to maintain a list of
+ * pcaps that need to be closed to clean up modes.
+ *
+ * XXX - not thread-safe.
*/
-int
-pcap_setnonblock_fd(pcap_t *p, int nonblock, char *errbuf)
-{
- int fdflags;
- fdflags = fcntl(p->fd, F_GETFL, 0);
- if (fdflags == -1) {
- pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "F_GETFL: %s",
- pcap_strerror(errno));
- return (-1);
- }
- if (nonblock)
- fdflags |= O_NONBLOCK;
- else
- fdflags &= ~O_NONBLOCK;
- if (fcntl(p->fd, F_SETFL, fdflags) == -1) {
- pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "F_SETFL: %s",
- pcap_strerror(errno));
- return (-1);
- }
- return (0);
-}
-#endif
+/*
+ * List of pcaps on which we've done something that needs to be
+ * cleaned up.
+ * If there are any such pcaps, we arrange to call "pcap_close_all()"
+ * when we exit, and have it close all of them.
+ */
+static struct pcap *pcaps_to_close;
-#ifdef _WIN32
/*
- * Generate a string for a Win32-specific error (i.e. an error generated when
- * calling a Win32 API).
- * For errors occurred during standard C calls, we still use pcap_strerror()
+ * TRUE if we've already called "atexit()" to cause "pcap_close_all()" to
+ * be called on exit.
*/
-void
-pcap_win32_err_to_str(DWORD error, char *errbuf)
+static int did_atexit;
+
+static void
+pcap_close_all(void)
{
- size_t errlen;
- char *p;
+ struct pcap *handle;
- FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, error, 0, errbuf,
- PCAP_ERRBUF_SIZE, NULL);
+ while ((handle = pcaps_to_close) != NULL) {
+ pcap_close(handle);
+
+ /*
+ * If a pcap module adds a pcap_t to the "close all"
+ * list by calling pcap_add_to_pcaps_to_close(), it
+ * must have a cleanup routine that removes it from the
+ * list, by calling pcap_remove_from_pcaps_to_close(),
+ * and must make that cleanup routine the cleanup_op
+ * for the pcap_t.
+ *
+ * That means that, after pcap_close() - which calls
+ * the cleanup_op for the pcap_t - the pcap_t must
+ * have been removed from the list, so pcaps_to_close
+ * must not be equal to handle.
+ *
+ * We check for that, and abort if handle is still
+ * at the head of the list, to prevent infinite loops.
+ */
+ if (pcaps_to_close == handle)
+ abort();
+ }
+}
+int
+pcap_do_addexit(pcap_t *p)
+{
/*
- * "FormatMessage()" "helpfully" sticks CR/LF at the end of the
- * message. Get rid of it.
+ * If we haven't already done so, arrange to have
+ * "pcap_close_all()" called when we exit.
*/
- errlen = strlen(errbuf);
- if (errlen >= 2) {
- errbuf[errlen - 1] = '\0';
- errbuf[errlen - 2] = '\0';
+ if (!did_atexit) {
+ if (atexit(pcap_close_all) != 0) {
+ /*
+ * "atexit()" failed; let our caller know.
+ */
+ pcap_strlcpy(p->errbuf, "atexit failed", PCAP_ERRBUF_SIZE);
+ return (0);
+ }
+ did_atexit = 1;
}
- p = strchr(errbuf, '\0');
- pcap_snprintf (p, PCAP_ERRBUF_SIZE+1-(p-errbuf), " (%lu)", error);
+ return (1);
}
-#endif
-/*
- * Generate error strings for PCAP_ERROR_ and PCAP_WARNING_ values.
- */
-const char *
-pcap_statustostr(int errnum)
+void
+pcap_add_to_pcaps_to_close(pcap_t *p)
{
- static char ebuf[15+10+1];
-
- switch (errnum) {
-
- case PCAP_WARNING:
- return("Generic warning");
-
- case PCAP_WARNING_TSTAMP_TYPE_NOTSUP:
- return ("That type of time stamp is not supported by that device");
-
- case PCAP_WARNING_PROMISC_NOTSUP:
- return ("That device doesn't support promiscuous mode");
-
- case PCAP_ERROR:
- return("Generic error");
-
- case PCAP_ERROR_BREAK:
- return("Loop terminated by pcap_breakloop");
-
- case PCAP_ERROR_NOT_ACTIVATED:
- return("The pcap_t has not been activated");
-
- case PCAP_ERROR_ACTIVATED:
- return ("The setting can't be changed after the pcap_t is activated");
-
- case PCAP_ERROR_NO_SUCH_DEVICE:
- return ("No such device exists");
-
- case PCAP_ERROR_RFMON_NOTSUP:
- return ("That device doesn't support monitor mode");
-
- case PCAP_ERROR_NOT_RFMON:
- return ("That operation is supported only in monitor mode");
-
- case PCAP_ERROR_PERM_DENIED:
- return ("You don't have permission to capture on that device");
-
- case PCAP_ERROR_IFACE_NOT_UP:
- return ("That device is not up");
-
- case PCAP_ERROR_CANTSET_TSTAMP_TYPE:
- return ("That device doesn't support setting the time stamp type");
+ p->next = pcaps_to_close;
+ pcaps_to_close = p;
+}
- case PCAP_ERROR_PROMISC_PERM_DENIED:
- return ("You don't have permission to capture in promiscuous mode on that device");
+void
+pcap_remove_from_pcaps_to_close(pcap_t *p)
+{
+ pcap_t *pc, *prevpc;
- case PCAP_ERROR_TSTAMP_PRECISION_NOTSUP:
- return ("That device doesn't support that time stamp precision");
+ for (pc = pcaps_to_close, prevpc = NULL; pc != NULL;
+ prevpc = pc, pc = pc->next) {
+ if (pc == p) {
+ /*
+ * Found it. Remove it from the list.
+ */
+ if (prevpc == NULL) {
+ /*
+ * It was at the head of the list.
+ */
+ pcaps_to_close = pc->next;
+ } else {
+ /*
+ * It was in the middle of the list.
+ */
+ prevpc->next = pc->next;
+ }
+ break;
+ }
}
- (void)pcap_snprintf(ebuf, sizeof ebuf, "Unknown error: %d", errnum);
- return(ebuf);
}
-/*
- * Not all systems have strerror().
- */
-const char *
-pcap_strerror(int errnum)
-{
-#ifdef HAVE_STRERROR
-#ifdef _WIN32
- static char errbuf[PCAP_ERRBUF_SIZE];
- errno_t errno;
- errno = strerror_s(errbuf, PCAP_ERRBUF_SIZE, errnum);
- if (errno != 0) /* errno = 0 if successful */
- strlcpy(errbuf, "strerror_s() error", PCAP_ERRBUF_SIZE);
- return (errbuf);
-#else
- return (strerror(errnum));
-#endif /* _WIN32 */
-#else
- extern int sys_nerr;
- extern const char *const sys_errlist[];
- static char errbuf[PCAP_ERRBUF_SIZE];
-
- if ((unsigned int)errnum < sys_nerr)
- return ((char *)sys_errlist[errnum]);
- (void)pcap_snprintf(errbuf, sizeof errbuf, "Unknown error: %d", errnum);
- return (errbuf);
-#endif
+void
+pcap_breakloop_common(pcap_t *p)
+{
+ p->break_loop = 1;
}
-int
-pcap_setfilter(pcap_t *p, struct bpf_program *fp)
+
+void
+pcap_cleanup_live_common(pcap_t *p)
{
- return (p->setfilter_op(p, fp));
+ if (p->opt.device != NULL) {
+ free(p->opt.device);
+ p->opt.device = NULL;
+ }
+ if (p->buffer != NULL) {
+ free(p->buffer);
+ p->buffer = NULL;
+ }
+ if (p->dlt_list != NULL) {
+ free(p->dlt_list);
+ p->dlt_list = NULL;
+ p->dlt_count = 0;
+ }
+ if (p->tstamp_type_list != NULL) {
+ free(p->tstamp_type_list);
+ p->tstamp_type_list = NULL;
+ p->tstamp_type_count = 0;
+ }
+ if (p->tstamp_precision_list != NULL) {
+ free(p->tstamp_precision_list);
+ p->tstamp_precision_list = NULL;
+ p->tstamp_precision_count = 0;
+ }
+ pcap_freecode(&p->fcode);
+#if !defined(_WIN32) && !defined(MSDOS)
+ if (p->fd >= 0) {
+ close(p->fd);
+ p->fd = -1;
+ }
+ p->selectable_fd = -1;
+#endif
}
/*
- * Set direction flag, which controls whether we accept only incoming
- * packets, only outgoing packets, or both.
- * Note that, depending on the platform, some or all direction arguments
- * might not be supported.
+ * API compatible with WinPcap's "send a packet" routine - returns -1
+ * on error, 0 otherwise.
+ *
+ * XXX - what if we get a short write?
*/
int
-pcap_setdirection(pcap_t *p, pcap_direction_t d)
+pcap_sendpacket(pcap_t *p, const u_char *buf, int size)
{
- if (p->setdirection_op == NULL) {
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
- "Setting direction is not implemented on this platform");
+ if (size <= 0) {
+ pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
+ errno, "The number of bytes to be sent must be positive");
+ return (PCAP_ERROR);
+ }
+
+ if (p->inject_op(p, buf, size) == -1)
return (-1);
- } else
- return (p->setdirection_op(p, d));
+ return (0);
}
+/*
+ * API compatible with OpenBSD's "send a packet" routine - returns -1 on
+ * error, number of bytes written otherwise.
+ */
int
-pcap_stats(pcap_t *p, struct pcap_stat *ps)
+pcap_inject(pcap_t *p, const void *buf, size_t size)
{
- return (p->stats_op(p, ps));
-}
+ /*
+ * We return the number of bytes written, so the number of
+ * bytes to write must fit in an int.
+ */
+ if (size > INT_MAX) {
+ pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
+ errno, "More than %d bytes cannot be injected", INT_MAX);
+ return (PCAP_ERROR);
+ }
-static int
-pcap_stats_dead(pcap_t *p, struct pcap_stat *ps _U_)
-{
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
- "Statistics aren't available from a pcap_open_dead pcap_t");
- return (-1);
-}
+ if (size == 0) {
+ pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
+ errno, "The number of bytes to be injected must not be zero");
+ return (PCAP_ERROR);
+ }
-#ifdef _WIN32
-struct pcap_stat *
-pcap_stats_ex(pcap_t *p, int *pcap_stat_size)
-{
- return (p->stats_ex_op(p, pcap_stat_size));
+ return (p->inject_op(p, buf, (int)size));
}
-int
-pcap_setbuff(pcap_t *p, int dim)
+void
+pcap_close(pcap_t *p)
{
- return (p->setbuff_op(p, dim));
+ p->cleanup_op(p);
+ free(p);
}
-static int
-pcap_setbuff_dead(pcap_t *p, int dim)
+/*
+ * Helpers for safely loading code at run time.
+ * Currently Windows-only.
+ */
+#ifdef _WIN32
+//
+// This wrapper around loadlibrary appends the system folder (usually
+// C:\Windows\System32) to the relative path of the DLL, so that the DLL
+// is always loaded from an absolute path (it's no longer possible to
+// load modules from the application folder).
+// This solves the DLL Hijacking issue discovered in August 2010:
+//
+// https://blog.rapid7.com/2010/08/23/exploiting-dll-hijacking-flaws/
+// https://blog.rapid7.com/2010/08/23/application-dll-load-hijacking/
+// (the purported Rapid7 blog post link in the first of those two links
+// is broken; the second of those links works.)
+//
+// If any links there are broken from all the content shuffling Rapid&
+// did, see archived versions of the posts at their original homes, at
+//
+// https://web.archive.org/web/20110122175058/http://blog.metasploit.com/2010/08/exploiting-dll-hijacking-flaws.html
+// https://web.archive.org/web/20100828112111/http://blog.rapid7.com/?p=5325
+//
+pcap_code_handle_t
+pcap_load_code(const char *name)
{
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
- "The kernel buffer size cannot be set on a pcap_open_dead pcap_t");
- return (-1);
-}
+ /*
+ * XXX - should this work in UTF-16LE rather than in the local
+ * ANSI code page?
+ */
+ CHAR path[MAX_PATH];
+ CHAR fullFileName[MAX_PATH];
+ UINT res;
+ HMODULE hModule = NULL;
+
+ do
+ {
+ res = GetSystemDirectoryA(path, MAX_PATH);
+
+ if (res == 0) {
+ //
+ // some bad failure occurred;
+ //
+ break;
+ }
-int
-pcap_setmode(pcap_t *p, int mode)
-{
- return (p->setmode_op(p, mode));
-}
+ if (res > MAX_PATH) {
+ //
+ // the buffer was not big enough
+ //
+ SetLastError(ERROR_INSUFFICIENT_BUFFER);
+ break;
+ }
-static int
-pcap_setmode_dead(pcap_t *p, int mode)
-{
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
- "impossible to set mode on a pcap_open_dead pcap_t");
- return (-1);
-}
+ if (res + 1 + strlen(name) + 1 < MAX_PATH) {
+ memcpy(fullFileName, path, res * sizeof(TCHAR));
+ fullFileName[res] = '\\';
+ memcpy(&fullFileName[res + 1], name, (strlen(name) + 1) * sizeof(TCHAR));
-int
-pcap_setmintocopy(pcap_t *p, int size)
-{
- return (p->setmintocopy_op(p, size));
-}
+ hModule = LoadLibraryA(fullFileName);
+ } else
+ SetLastError(ERROR_INSUFFICIENT_BUFFER);
-static int
-pcap_setmintocopy_dead(pcap_t *p, int size)
-{
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
- "The mintocopy parameter cannot be set on a pcap_open_dead pcap_t");
- return (-1);
-}
+ } while(FALSE);
-HANDLE
-pcap_getevent(pcap_t *p)
-{
- return (p->getevent_op(p));
+ return hModule;
}
-static HANDLE
-pcap_getevent_dead(pcap_t *p)
+pcap_funcptr_t
+pcap_find_function(pcap_code_handle_t code, const char *func)
{
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
- "A pcap_open_dead pcap_t has no event handle");
- return (INVALID_HANDLE_VALUE);
+ return (GetProcAddress(code, func));
}
+#endif
+/*
+ * Given a BPF program, a pcap_pkthdr structure for a packet, and the raw
+ * data for the packet, check whether the packet passes the filter.
+ * Returns the return value of the filter program, which will be zero if
+ * the packet doesn't pass and non-zero if the packet does pass.
+ */
int
-pcap_oid_get_request(pcap_t *p, bpf_u_int32 oid, void *data, size_t *lenp)
+pcap_offline_filter(const struct bpf_program *fp, const struct pcap_pkthdr *h,
+ const u_char *pkt)
{
- return (p->oid_get_request_op(p, oid, data, lenp));
+ const struct bpf_insn *fcode = fp->bf_insns;
+
+ if (fcode != NULL)
+ return (pcap_filter(fcode, pkt, h->len, h->caplen));
+ else
+ return (0);
}
static int
-pcap_oid_get_request_dead(pcap_t *p, bpf_u_int32 oid _U_, void *data _U_,
- size_t *lenp _U_)
+pcap_can_set_rfmon_dead(pcap_t *p)
{
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
- "An OID get request cannot be performed on a pcap_open_dead pcap_t");
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Rfmon mode doesn't apply on a pcap_open_dead pcap_t");
return (PCAP_ERROR);
}
-int
-pcap_oid_set_request(pcap_t *p, bpf_u_int32 oid, const void *data, size_t *lenp)
+static int
+pcap_read_dead(pcap_t *p, int cnt _U_, pcap_handler callback _U_,
+ u_char *user _U_)
{
- return (p->oid_set_request_op(p, oid, data, lenp));
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Packets aren't available from a pcap_open_dead pcap_t");
+ return (-1);
}
-static int
-pcap_oid_set_request_dead(pcap_t *p, bpf_u_int32 oid _U_, const void *data _U_,
- size_t *lenp _U_)
+static void
+pcap_breakloop_dead(pcap_t *p _U_)
{
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
- "An OID set request cannot be performed on a pcap_open_dead pcap_t");
- return (PCAP_ERROR);
+ /*
+ * A "dead" pcap_t is just a placeholder to use in order to
+ * compile a filter to BPF code or to open a savefile for
+ * writing. It doesn't support any operations, including
+ * capturing or reading packets, so there will never be a
+ * get-packets loop in progress to break out *of*.
+ *
+ * As such, this routine doesn't need to do anything.
+ */
}
-pcap_send_queue *
-pcap_sendqueue_alloc(u_int memsize)
+static int
+pcap_inject_dead(pcap_t *p, const void *buf _U_, int size _U_)
{
- pcap_send_queue *tqueue;
-
- /* Allocate the queue */
- tqueue = (pcap_send_queue *)malloc(sizeof(pcap_send_queue));
- if (tqueue == NULL){
- return (NULL);
- }
-
- /* Allocate the buffer */
- tqueue->buffer = (char *)malloc(memsize);
- if (tqueue->buffer == NULL) {
- free(tqueue);
- return (NULL);
- }
-
- tqueue->maxlen = memsize;
- tqueue->len = 0;
-
- return (tqueue);
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Packets can't be sent on a pcap_open_dead pcap_t");
+ return (-1);
}
-void
-pcap_sendqueue_destroy(pcap_send_queue *queue)
+static int
+pcap_setfilter_dead(pcap_t *p, struct bpf_program *fp _U_)
{
- free(queue->buffer);
- free(queue);
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "A filter cannot be set on a pcap_open_dead pcap_t");
+ return (-1);
}
-int
-pcap_sendqueue_queue(pcap_send_queue *queue, const struct pcap_pkthdr *pkt_header, const u_char *pkt_data)
+static int
+pcap_setdirection_dead(pcap_t *p, pcap_direction_t d _U_)
{
- if (queue->len + sizeof(struct pcap_pkthdr) + pkt_header->caplen > queue->maxlen){
- return (-1);
- }
-
- /* Copy the pcap_pkthdr header*/
- memcpy(queue->buffer + queue->len, pkt_header, sizeof(struct pcap_pkthdr));
- queue->len += sizeof(struct pcap_pkthdr);
-
- /* copy the packet */
- memcpy(queue->buffer + queue->len, pkt_data, pkt_header->caplen);
- queue->len += pkt_header->caplen;
-
- return (0);
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "The packet direction cannot be set on a pcap_open_dead pcap_t");
+ return (-1);
}
-u_int
-pcap_sendqueue_transmit(pcap_t *p, pcap_send_queue *queue, int sync)
+static int
+pcap_set_datalink_dead(pcap_t *p, int dlt _U_)
{
- return (p->sendqueue_transmit_op(p, queue, sync));
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "The link-layer header type cannot be set on a pcap_open_dead pcap_t");
+ return (-1);
}
-static u_int
-pcap_sendqueue_transmit_dead(pcap_t *p, pcap_send_queue *queue, int sync)
+static int
+pcap_getnonblock_dead(pcap_t *p)
{
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
- "Packets cannot be transmitted on a pcap_open_dead pcap_t");
- return (0);
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "A pcap_open_dead pcap_t does not have a non-blocking mode setting");
+ return (-1);
}
-int
-pcap_setuserbuffer(pcap_t *p, int size)
+static int
+pcap_setnonblock_dead(pcap_t *p, int nonblock _U_)
{
- return (p->setuserbuffer_op(p, size));
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "A pcap_open_dead pcap_t does not have a non-blocking mode setting");
+ return (-1);
}
static int
-pcap_setuserbuffer_dead(pcap_t *p, int size)
+pcap_stats_dead(pcap_t *p, struct pcap_stat *ps _U_)
{
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
- "The user buffer cannot be set on a pcap_open_dead pcap_t");
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Statistics aren't available from a pcap_open_dead pcap_t");
return (-1);
}
-int
-pcap_live_dump(pcap_t *p, char *filename, int maxsize, int maxpacks)
+#ifdef _WIN32
+static struct pcap_stat *
+pcap_stats_ex_dead(pcap_t *p, int *pcap_stat_size _U_)
{
- return (p->live_dump_op(p, filename, maxsize, maxpacks));
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Statistics aren't available from a pcap_open_dead pcap_t");
+ return (NULL);
}
static int
-pcap_live_dump_dead(pcap_t *p, char *filename, int maxsize, int maxpacks)
+pcap_setbuff_dead(pcap_t *p, int dim _U_)
{
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
- "Live packet dumping cannot be performed on a pcap_open_dead pcap_t");
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "The kernel buffer size cannot be set on a pcap_open_dead pcap_t");
return (-1);
}
-int
-pcap_live_dump_ended(pcap_t *p, int sync)
+static int
+pcap_setmode_dead(pcap_t *p, int mode _U_)
{
- return (p->live_dump_ended_op(p, sync));
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "impossible to set mode on a pcap_open_dead pcap_t");
+ return (-1);
}
static int
-pcap_live_dump_ended_dead(pcap_t *p, int sync)
+pcap_setmintocopy_dead(pcap_t *p, int size _U_)
{
- pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
- "Live packet dumping cannot be performed on a pcap_open_dead pcap_t");
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "The mintocopy parameter cannot be set on a pcap_open_dead pcap_t");
return (-1);
}
-PAirpcapHandle
-pcap_get_airpcap_handle(pcap_t *p)
+static HANDLE
+pcap_getevent_dead(pcap_t *p)
{
- PAirpcapHandle handle;
-
- handle = p->get_airpcap_handle_op(p);
- if (handle == NULL) {
- (void)pcap_snprintf(p->errbuf, sizeof(p->errbuf),
- "This isn't an AirPcap device");
- }
- return (handle);
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "A pcap_open_dead pcap_t has no event handle");
+ return (INVALID_HANDLE_VALUE);
}
-static PAirpcapHandle
-pcap_get_airpcap_handle_dead(pcap_t *p)
+static int
+pcap_oid_get_request_dead(pcap_t *p, bpf_u_int32 oid _U_, void *data _U_,
+ size_t *lenp _U_)
{
- return (NULL);
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "An OID get request cannot be performed on a pcap_open_dead pcap_t");
+ return (PCAP_ERROR);
}
-#endif
-
-/*
- * On some platforms, we need to clean up promiscuous or monitor mode
- * when we close a device - and we want that to happen even if the
- * application just exits without explicitl closing devices.
- * On those platforms, we need to register a "close all the pcaps"
- * routine to be called when we exit, and need to maintain a list of
- * pcaps that need to be closed to clean up modes.
- *
- * XXX - not thread-safe.
- */
-
-/*
- * List of pcaps on which we've done something that needs to be
- * cleaned up.
- * If there are any such pcaps, we arrange to call "pcap_close_all()"
- * when we exit, and have it close all of them.
- */
-static struct pcap *pcaps_to_close;
-
-/*
- * TRUE if we've already called "atexit()" to cause "pcap_close_all()" to
- * be called on exit.
- */
-static int did_atexit;
-static void
-pcap_close_all(void)
+static int
+pcap_oid_set_request_dead(pcap_t *p, bpf_u_int32 oid _U_, const void *data _U_,
+ size_t *lenp _U_)
{
- struct pcap *handle;
-
- while ((handle = pcaps_to_close) != NULL)
- pcap_close(handle);
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "An OID set request cannot be performed on a pcap_open_dead pcap_t");
+ return (PCAP_ERROR);
}
-int
-pcap_do_addexit(pcap_t *p)
+static u_int
+pcap_sendqueue_transmit_dead(pcap_t *p, pcap_send_queue *queue _U_,
+ int sync _U_)
{
- /*
- * If we haven't already done so, arrange to have
- * "pcap_close_all()" called when we exit.
- */
- if (!did_atexit) {
- if (atexit(pcap_close_all) != 0) {
- /*
- * "atexit()" failed; let our caller know.
- */
- strlcpy(p->errbuf, "atexit failed", PCAP_ERRBUF_SIZE);
- return (0);
- }
- did_atexit = 1;
- }
- return (1);
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Packets cannot be transmitted on a pcap_open_dead pcap_t");
+ return (0);
}
-void
-pcap_add_to_pcaps_to_close(pcap_t *p)
+static int
+pcap_setuserbuffer_dead(pcap_t *p, int size _U_)
{
- p->next = pcaps_to_close;
- pcaps_to_close = p;
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "The user buffer cannot be set on a pcap_open_dead pcap_t");
+ return (-1);
}
-void
-pcap_remove_from_pcaps_to_close(pcap_t *p)
+static int
+pcap_live_dump_dead(pcap_t *p, char *filename _U_, int maxsize _U_,
+ int maxpacks _U_)
{
- pcap_t *pc, *prevpc;
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Live packet dumping cannot be performed on a pcap_open_dead pcap_t");
+ return (-1);
+}
- for (pc = pcaps_to_close, prevpc = NULL; pc != NULL;
- prevpc = pc, pc = pc->next) {
- if (pc == p) {
- /*
- * Found it. Remove it from the list.
- */
- if (prevpc == NULL) {
- /*
- * It was at the head of the list.
- */
- pcaps_to_close = pc->next;
- } else {
- /*
- * It was in the middle of the list.
- */
- prevpc->next = pc->next;
- }
- break;
- }
- }
+static int
+pcap_live_dump_ended_dead(pcap_t *p, int sync _U_)
+{
+ snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
+ "Live packet dumping cannot be performed on a pcap_open_dead pcap_t");
+ return (-1);
}
-void
-pcap_cleanup_live_common(pcap_t *p)
+static PAirpcapHandle
+pcap_get_airpcap_handle_dead(pcap_t *p _U_)
{
- if (p->buffer != NULL) {
- free(p->buffer);
- p->buffer = NULL;
- }
- if (p->dlt_list != NULL) {
- free(p->dlt_list);
- p->dlt_list = NULL;
- p->dlt_count = 0;
- }
- if (p->tstamp_type_list != NULL) {
- free(p->tstamp_type_list);
- p->tstamp_type_list = NULL;
- p->tstamp_type_count = 0;
- }
- if (p->tstamp_precision_list != NULL) {
- free(p->tstamp_precision_list);
- p->tstamp_precision_list = NULL;
- p->tstamp_precision_count = 0;
- }
- pcap_freecode(&p->fcode);
-#if !defined(_WIN32) && !defined(MSDOS)
- if (p->fd >= 0) {
- close(p->fd);
- p->fd = -1;
- }
- p->selectable_fd = -1;
-#endif
+ return (NULL);
}
+#endif /* _WIN32 */
static void
pcap_cleanup_dead(pcap_t *p _U_)
break;
default:
- return NULL;
+ /*
+ * This doesn't really matter, but we don't have any way
+ * to report particular errors, so the only failure we
+ * should have is a memory allocation failure. Just
+ * pick microsecond precision.
+ */
+ precision = PCAP_TSTAMP_PRECISION_MICRO;
+ break;
}
p = malloc(sizeof(*p));
if (p == NULL)
p->snapshot = snaplen;
p->linktype = linktype;
p->opt.tstamp_precision = precision;
+ p->can_set_rfmon_op = pcap_can_set_rfmon_dead;
+ p->read_op = pcap_read_dead;
+ p->inject_op = pcap_inject_dead;
+ p->setfilter_op = pcap_setfilter_dead;
+ p->setdirection_op = pcap_setdirection_dead;
+ p->set_datalink_op = pcap_set_datalink_dead;
+ p->getnonblock_op = pcap_getnonblock_dead;
+ p->setnonblock_op = pcap_setnonblock_dead;
p->stats_op = pcap_stats_dead;
#ifdef _WIN32
- p->stats_ex_op = (stats_ex_op_t)pcap_not_initialized_ptr;
+ p->stats_ex_op = pcap_stats_ex_dead;
p->setbuff_op = pcap_setbuff_dead;
p->setmode_op = pcap_setmode_dead;
p->setmintocopy_op = pcap_setmintocopy_dead;
p->live_dump_ended_op = pcap_live_dump_ended_dead;
p->get_airpcap_handle_op = pcap_get_airpcap_handle_dead;
#endif
+ p->breakloop_op = pcap_breakloop_dead;
p->cleanup_op = pcap_cleanup_dead;
/*
PCAP_TSTAMP_PRECISION_MICRO));
}
-/*
- * API compatible with WinPcap's "send a packet" routine - returns -1
- * on error, 0 otherwise.
- *
- * XXX - what if we get a short write?
- */
-int
-pcap_sendpacket(pcap_t *p, const u_char *buf, int size)
-{
- if (p->inject_op(p, buf, size) == -1)
- return (-1);
- return (0);
-}
-
-/*
- * API compatible with OpenBSD's "send a packet" routine - returns -1 on
- * error, number of bytes written otherwise.
- */
-int
-pcap_inject(pcap_t *p, const void *buf, size_t size)
-{
- return (p->inject_op(p, buf, size));
-}
-
-void
-pcap_close(pcap_t *p)
-{
- if (p->opt.device != NULL)
- free(p->opt.device);
- p->cleanup_op(p);
- free(p);
-}
-
-/*
- * Given a BPF program, a pcap_pkthdr structure for a packet, and the raw
- * data for the packet, check whether the packet passes the filter.
- * Returns the return value of the filter program, which will be zero if
- * the packet doesn't pass and non-zero if the packet does pass.
- */
-int
-pcap_offline_filter(const struct bpf_program *fp, const struct pcap_pkthdr *h,
- const u_char *pkt)
-{
- const struct bpf_insn *fcode = fp->bf_insns;
-
- if (fcode != NULL)
- return (bpf_filter(fcode, pkt, h->len, h->caplen));
- else
- return (0);
-}
-
-#include "pcap_version.h"
-
-#ifdef _WIN32
-
-static char *full_pcap_version_string;
-
-#ifdef HAVE_VERSION_H
-/*
- * libpcap being built for Windows, as part of a WinPcap/Npcap source
- * tree. Include version.h from that source tree to get the WinPcap/Npcap
- * version.
- *
- * XXX - it'd be nice if we could somehow generate the WinPcap version number
- * when building WinPcap. (It'd be nice to do so for the packet.dll version
- * number as well.)
- */
-#include "../../version.h"
-
-static const char wpcap_version_string[] = WINPCAP_VER_STRING;
-static const char pcap_version_string_fmt[] =
- WINPCAP_PRODUCT_NAME " version %s, based on %s";
-static const char pcap_version_string_packet_dll_fmt[] =
- WINPCAP_PRODUCT_NAME " version %s (packet.dll version %s), based on %s";
-
-const char *
-pcap_lib_version(void)
-{
- char *packet_version_string;
- size_t full_pcap_version_string_len;
-
- if (full_pcap_version_string == NULL) {
- /*
- * Generate the version string.
- */
- packet_version_string = PacketGetVersion();
- if (strcmp(wpcap_version_string, packet_version_string) == 0) {
- /*
- * WinPcap version string and packet.dll version
- * string are the same; just report the WinPcap
- * version.
- */
- full_pcap_version_string_len =
- (sizeof pcap_version_string_fmt - 4) +
- strlen(wpcap_version_string) +
- strlen(pcap_version_string);
- full_pcap_version_string =
- malloc(full_pcap_version_string_len);
- if (full_pcap_version_string == NULL)
- return (NULL);
- pcap_snprintf(full_pcap_version_string,
- full_pcap_version_string_len,
- pcap_version_string_fmt,
- wpcap_version_string,
- pcap_version_string);
- } else {
- /*
- * WinPcap version string and packet.dll version
- * string are different; that shouldn't be the
- * case (the two libraries should come from the
- * same version of WinPcap), so we report both
- * versions.
- */
- full_pcap_version_string_len =
- (sizeof pcap_version_string_packet_dll_fmt - 6) +
- strlen(wpcap_version_string) +
- strlen(packet_version_string) +
- strlen(pcap_version_string);
- full_pcap_version_string = malloc(full_pcap_version_string_len);
- if (full_pcap_version_string == NULL)
- return (NULL);
- pcap_snprintf(full_pcap_version_string,
- full_pcap_version_string_len,
- pcap_version_string_packet_dll_fmt,
- wpcap_version_string,
- packet_version_string,
- pcap_version_string);
- }
- }
- return (full_pcap_version_string);
-}
-
-#else /* HAVE_VERSION_H */
-
-/*
- * libpcap being built for Windows, not as part of a WinPcap/Npcap source
- * tree.
- */
-static const char pcap_version_string_packet_dll_fmt[] =
- "%s (packet.dll version %s)";
-const char *
-pcap_lib_version(void)
-{
- char *packet_version_string;
- size_t full_pcap_version_string_len;
-
- if (full_pcap_version_string == NULL) {
- /*
- * Generate the version string. Report the packet.dll
- * version.
- */
- packet_version_string = PacketGetVersion();
- full_pcap_version_string_len =
- (sizeof pcap_version_string_packet_dll_fmt - 4) +
- strlen(pcap_version_string) +
- strlen(packet_version_string);
- full_pcap_version_string = malloc(full_pcap_version_string_len);
- if (full_pcap_version_string == NULL)
- return (NULL);
- pcap_snprintf(full_pcap_version_string,
- full_pcap_version_string_len,
- pcap_version_string_packet_dll_fmt,
- pcap_version_string,
- packet_version_string);
- }
- return (full_pcap_version_string);
-}
-
-#endif /* HAVE_VERSION_H */
-
-#elif defined(MSDOS)
-
-static char *full_pcap_version_string;
-
-const char *
-pcap_lib_version (void)
-{
- char *packet_version_string;
- size_t full_pcap_version_string_len;
- static char dospfx[] = "DOS-";
-
- if (full_pcap_version_string == NULL) {
- /*
- * Generate the version string.
- */
- full_pcap_version_string_len =
- sizeof dospfx + strlen(pcap_version_string);
- full_pcap_version_string =
- malloc(full_pcap_version_string_len);
- if (full_pcap_version_string == NULL)
- return (NULL);
- strcpy(full_pcap_version_string, dospfx);
- strcat(full_pcap_version_string, pcap_version_string);
- }
- return (full_pcap_version_string);
-}
-
-#else /* UN*X */
-
-const char *
-pcap_lib_version(void)
-{
- return (pcap_version_string);
-}
-#endif
-
#ifdef YYDEBUG
/*
* Set the internal "debug printout" flag for the filter expression parser.
PCAP_API_DEF void
pcap_set_parser_debug(int value)
{
- extern int pcap_debug;
-
pcap_debug = value;
}
#endif
-
-#ifdef BDEBUG
-/*
- * Set the internal "debug printout" flag for the filter expression optimizer.
- * The code to print that stuff is present only if BDEBUG is defined, so
- * the flag, and the routine to set it, are defined only if BDEBUG is
- * defined.
- *
- * This is intended for libpcap developers, not for general use.
- * If you want to set these in a program, you'll have to declare this
- * routine yourself, with the appropriate DLL import attribute on Windows;
- * it's not declared in any header file, and won't be declared in any
- * header file provided by libpcap.
- */
-PCAP_API void pcap_set_optimizer_debug(int value);
-
-PCAP_API_DEF void
-pcap_set_optimizer_debug(int value)
-{
- extern int pcap_optimizer_debug;
-
- pcap_optimizer_debug = value;
-}
-#endif
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