* SUCH DAMAGE.
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/libpcap/inet.c,v 1.74 2006-12-30 09:54:57 guy Exp $ (LBL)";
-#endif
-
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#ifdef WIN32
+#ifdef _WIN32
#include <pcap-stdinc.h>
-#else /* WIN32 */
+#else /* _WIN32 */
#include <sys/param.h>
#ifndef MSDOS
struct rtentry; /* declarations in <net/if.h> */
#include <net/if.h>
#include <netinet/in.h>
-#endif /* WIN32 */
+#endif /* _WIN32 */
-#include <ctype.h>
#include <errno.h>
#include <memory.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#if !defined(WIN32) && !defined(__BORLANDC__)
+#if !defined(_WIN32) && !defined(__BORLANDC__)
#include <unistd.h>
-#endif /* !WIN32 && !__BORLANDC__ */
-#ifdef HAVE_LIMITS_H
-#include <limits.h>
-#else
-#define INT_MAX 2147483647
-#endif
+#endif /* !_WIN32 && !__BORLANDC__ */
#include "pcap-int.h"
#include "os-proto.h"
#endif
-/* Not all systems have IFF_LOOPBACK */
-#ifdef IFF_LOOPBACK
-#define ISLOOPBACK(name, flags) ((flags) & IFF_LOOPBACK)
-#else
-#define ISLOOPBACK(name, flags) ((name)[0] == 'l' && (name)[1] == 'o' && \
- (isdigit((unsigned char)((name)[2])) || (name)[2] == '\0'))
-#endif
-
-struct sockaddr *
-dup_sockaddr(struct sockaddr *sa, size_t sa_length)
-{
- struct sockaddr *newsa;
-
- if ((newsa = malloc(sa_length)) == NULL)
- return (NULL);
- return (memcpy(newsa, sa, sa_length));
-}
-
-static int
-get_instance(const char *name)
-{
- const char *cp, *endcp;
- int n;
-
- if (strcmp(name, "any") == 0) {
- /*
- * Give the "any" device an artificially high instance
- * number, so it shows up after all other non-loopback
- * interfaces.
- */
- return INT_MAX;
- }
-
- endcp = name + strlen(name);
- for (cp = name; cp < endcp && !isdigit((unsigned char)*cp); ++cp)
- continue;
-
- if (isdigit((unsigned char)*cp))
- n = atoi(cp);
- else
- n = 0;
- return (n);
-}
-
-int
-add_or_find_if(pcap_if_t **curdev_ret, pcap_if_t **alldevs, const char *name,
- u_int flags, const char *description, char *errbuf)
-{
- pcap_t *p;
- pcap_if_t *curdev, *prevdev, *nextdev;
- int this_instance;
-
- /*
- * Is there already an entry in the list for this interface?
- */
- for (curdev = *alldevs; curdev != NULL; curdev = curdev->next) {
- if (strcmp(name, curdev->name) == 0)
- break; /* yes, we found it */
- }
-
- if (curdev == NULL) {
- /*
- * No, we didn't find it.
- *
- * Can we open this interface for live capture?
- *
- * We do this check so that interfaces that are
- * supplied by the interface enumeration mechanism
- * we're using but that don't support packet capture
- * aren't included in the list. Loopback interfaces
- * on Solaris are an example of this; we don't just
- * omit loopback interfaces on all platforms because
- * you *can* capture on loopback interfaces on some
- * OSes.
- *
- * On OS X, we don't do this check if the device
- * name begins with "wlt"; at least some versions
- * of OS X offer monitor mode capturing by having
- * a separate "monitor mode" device for each wireless
- * adapter, rather than by implementing the ioctls
- * that {Free,Net,Open,DragonFly}BSD provide.
- * Opening that device puts the adapter into monitor
- * mode, which, at least for some adapters, causes
- * them to deassociate from the network with which
- * they're associated.
- *
- * Instead, we try to open the corresponding "en"
- * device (so that we don't end up with, for users
- * without sufficient privilege to open capture
- * devices, a list of adapters that only includes
- * the wlt devices).
- */
-#ifdef __APPLE__
- if (strncmp(name, "wlt", 3) == 0) {
- char *en_name;
- size_t en_name_len;
-
- /*
- * Try to allocate a buffer for the "en"
- * device's name.
- */
- en_name_len = strlen(name) - 1;
- en_name = malloc(en_name_len + 1);
- if (en_name == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- return (-1);
- }
- strcpy(en_name, "en");
- strcat(en_name, name + 3);
- p = pcap_open_live(en_name, 68, 0, 0, errbuf);
- free(en_name);
- } else
-#endif /* __APPLE */
- p = pcap_open_live(name, 68, 0, 0, errbuf);
- if (p == NULL) {
- /*
- * No. Don't bother including it.
- * Don't treat this as an error, though.
- */
- *curdev_ret = NULL;
- return (0);
- }
- pcap_close(p);
-
- /*
- * Yes, we can open it.
- * Allocate a new entry.
- */
- curdev = malloc(sizeof(pcap_if_t));
- if (curdev == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- return (-1);
- }
-
- /*
- * Fill in the entry.
- */
- curdev->next = NULL;
- curdev->name = strdup(name);
- if (curdev->name == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- free(curdev);
- return (-1);
- }
- if (description != NULL) {
- /*
- * We have a description for this interface.
- */
- curdev->description = strdup(description);
- if (curdev->description == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- free(curdev->name);
- free(curdev);
- return (-1);
- }
- } else {
- /*
- * We don't.
- */
- curdev->description = NULL;
- }
- curdev->addresses = NULL; /* list starts out as empty */
- curdev->flags = 0;
- if (ISLOOPBACK(name, flags))
- curdev->flags |= PCAP_IF_LOOPBACK;
-
- /*
- * Add it to the list, in the appropriate location.
- * First, get the instance number of this interface.
- */
- this_instance = get_instance(name);
-
- /*
- * Now look for the last interface with an instance number
- * less than or equal to the new interface's instance
- * number - except that non-loopback interfaces are
- * arbitrarily treated as having interface numbers less
- * than those of loopback interfaces, so the loopback
- * interfaces are put at the end of the list.
- *
- * We start with "prevdev" being NULL, meaning we're before
- * the first element in the list.
- */
- prevdev = NULL;
- for (;;) {
- /*
- * Get the interface after this one.
- */
- if (prevdev == NULL) {
- /*
- * The next element is the first element.
- */
- nextdev = *alldevs;
- } 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;
- }
-
- /*
- * Is the new interface a non-loopback interface
- * and the next interface a loopback interface?
- */
- if (!(curdev->flags & PCAP_IF_LOOPBACK) &&
- (nextdev->flags & PCAP_IF_LOOPBACK)) {
- /*
- * Yes, we should put the new entry
- * before "nextdev", i.e. after "prevdev".
- */
- break;
- }
-
- /*
- * Is the new interface's instance number less
- * than the next interface's instance number,
- * and is it the case that the new interface is a
- * non-loopback interface or the next interface is
- * a loopback interface?
- *
- * (The goal of both loopback tests is to make
- * sure that we never put a loopback interface
- * before any non-loopback interface and that we
- * always put a non-loopback interface before all
- * loopback interfaces.)
- */
- if (this_instance < get_instance(nextdev->name) &&
- (!(curdev->flags & PCAP_IF_LOOPBACK) ||
- (nextdev->flags & PCAP_IF_LOOPBACK))) {
- /*
- * Yes - we should put the new entry
- * before "nextdev", i.e. after "prevdev".
- */
- break;
- }
-
- prevdev = nextdev;
- }
-
- /*
- * Insert before "nextdev".
- */
- curdev->next = nextdev;
-
- /*
- * Insert after "prevdev" - unless "prevdev" is null,
- * in which case this is the first interface.
- */
- if (prevdev == NULL) {
- /*
- * This is the first interface. Pass back a
- * pointer to it, and put "curdev" before
- * "nextdev".
- */
- *alldevs = curdev;
- } else
- prevdev->next = curdev;
- }
-
- *curdev_ret = curdev;
- return (0);
-}
-
-/*
- * 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?
- * Do any other UN*Xes support getting a description?
- */
-int
-add_addr_to_iflist(pcap_if_t **alldevs, const char *name, u_int flags,
- 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)
-{
- pcap_if_t *curdev;
- pcap_addr_t *curaddr, *prevaddr, *nextaddr;
-
- if (add_or_find_if(&curdev, alldevs, name, flags, NULL, errbuf) == -1) {
- /*
- * Error - give up.
- */
- return (-1);
- }
- if (curdev == NULL) {
- /*
- * Device wasn't added because it can't be opened.
- * Not a fatal error.
- */
- return (0);
- }
-
- /*
- * "curdev" is an entry for this interface; add an entry for this
- * address to its list of addresses.
- *
- * Allocate the new entry and fill it in.
- */
- curaddr = malloc(sizeof(pcap_addr_t));
- if (curaddr == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- return (-1);
- }
-
- curaddr->next = NULL;
- if (addr != NULL) {
- curaddr->addr = dup_sockaddr(addr, addr_size);
- if (curaddr->addr == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- free(curaddr);
- return (-1);
- }
- } else
- curaddr->addr = NULL;
-
- if (netmask != NULL) {
- curaddr->netmask = dup_sockaddr(netmask, netmask_size);
- if (curaddr->netmask == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- if (curaddr->addr != NULL)
- free(curaddr->addr);
- free(curaddr);
- return (-1);
- }
- } else
- curaddr->netmask = NULL;
-
- if (broadaddr != NULL) {
- curaddr->broadaddr = dup_sockaddr(broadaddr, broadaddr_size);
- if (curaddr->broadaddr == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- 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) {
- curaddr->dstaddr = dup_sockaddr(dstaddr, dstaddr_size);
- if (curaddr->dstaddr == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- 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;
-
- /*
- * Find the end of the list of addresses.
- */
- for (prevaddr = curdev->addresses; prevaddr != NULL; prevaddr = nextaddr) {
- nextaddr = prevaddr->next;
- if (nextaddr == NULL) {
- /*
- * This is the end of the list.
- */
- break;
- }
- }
-
- 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;
- }
-
- return (0);
-}
-
-int
-pcap_add_if(pcap_if_t **devlist, const char *name, u_int flags,
- const char *description, char *errbuf)
-{
- pcap_if_t *curdev;
-
- return (add_or_find_if(&curdev, devlist, name, flags, description,
- errbuf));
-}
-
-
-/*
- * Free a list of interfaces.
- */
-void
-pcap_freealldevs(pcap_if_t *alldevs)
-{
- pcap_if_t *curdev, *nextdev;
- pcap_addr_t *curaddr, *nextaddr;
-
- for (curdev = alldevs; curdev != NULL; curdev = nextdev) {
- nextdev = curdev->next;
-
- /*
- * 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);
- }
-
- /*
- * Free the name string.
- */
- free(curdev->name);
-
- /*
- * Free the description string, if any.
- */
- if (curdev->description != NULL)
- free(curdev->description);
-
- /*
- * Free the interface.
- */
- free(curdev);
- }
-}
-
-#if !defined(WIN32) && !defined(MSDOS)
+#if !defined(_WIN32) && !defined(MSDOS)
/*
* Return the name of a network interface attached to the system, or NULL
register char *errbuf;
{
register int fd;
- register struct sockaddr_in *sin;
+ register struct sockaddr_in *sin4;
struct ifreq ifr;
/*
|| strstr(device, "bluetooth") != NULL
#endif
#ifdef PCAP_SUPPORT_USB
- || strstr(device, "usb") != NULL
+ || strstr(device, "usbmon") != NULL
+#endif
+#ifdef HAVE_SNF_API
+ || strstr(device, "snf") != NULL
#endif
) {
*netp = *maskp = 0;
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "socket: %s",
+ (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "socket: %s",
pcap_strerror(errno));
return (-1);
}
/* XXX Work around Linux kernel bug */
ifr.ifr_addr.sa_family = AF_INET;
#endif
- (void)strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
+ (void)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,
+ (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"%s: no IPv4 address assigned", device);
} else {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"SIOCGIFADDR: %s: %s",
device, pcap_strerror(errno));
}
(void)close(fd);
return (-1);
}
- sin = (struct sockaddr_in *)&ifr.ifr_addr;
- *netp = sin->sin_addr.s_addr;
+ 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)strlcpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
if (ioctl(fd, SIOCGIFNETMASK, (char *)&ifr) < 0) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"SIOCGIFNETMASK: %s: %s", device, pcap_strerror(errno));
(void)close(fd);
return (-1);
}
(void)close(fd);
- *maskp = sin->sin_addr.s_addr;
+ *maskp = sin4->sin_addr.s_addr;
if (*maskp == 0) {
if (IN_CLASSA(*netp))
*maskp = IN_CLASSA_NET;
else if (IN_CLASSC(*netp))
*maskp = IN_CLASSC_NET;
else {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
"inet class for 0x%x unknown", *netp);
return (-1);
}
return (0);
}
-#elif defined(WIN32)
+#elif defined(_WIN32)
/*
* 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.
+ *
+ * In the best of all possible worlds, this would be the same as on
+ * UN*X, but there may be software that expects this to return a
+ * full list of devices after the first device.
*/
char *
pcap_lookupdev(errbuf)
{
DWORD dwVersion;
DWORD dwWindowsMajorVersion;
+ char our_errbuf[PCAP_ERRBUF_SIZE+1];
+
dwVersion = GetVersion(); /* get the OS version */
dwWindowsMajorVersion = (DWORD)(LOBYTE(LOWORD(dwVersion)));
-
+
if (dwVersion >= 0x80000000 && dwWindowsMajorVersion >= 4) {
/*
* Windows 95, 98, ME.
*/
ULONG NameLength = 8192;
static char AdaptersName[8192];
-
+
if (PacketGetAdapterNames(AdaptersName,&NameLength) )
return (AdaptersName);
else
if(TAdaptersName == NULL)
{
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE, "memory allocation failure");
+ (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "memory allocation failure");
return NULL;
}
if ( !PacketGetAdapterNames((PTSTR)TAdaptersName,&NameLength) )
{
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "PacketGetAdapterNames: %s",
- pcap_win32strerror());
+ pcap_win32_err_to_str(GetLastError(), our_errbuf);
+ (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "PacketGetAdapterNames: %s", our_errbuf);
free(TAdaptersName);
return NULL;
}
*/
while(NAdapts--)
{
- strcpy((char*)tUstr, tAstr);
- (char*)tUstr += strlen(tAstr) + 1;;
+ char* tmp = (char*)tUstr;
+ strcpy(tmp, tAstr);
+ tmp += strlen(tAstr) + 1;
+ tUstr = (WCHAR*)tmp;
tAstr += strlen(tAstr) + 1;
}
free(TAdaptersName);
return (char *)(AdaptersName);
- }
+ }
}
register bpf_u_int32 *netp, *maskp;
register char *errbuf;
{
- /*
+ /*
* We need only the first IPv4 address, so we must scan the array returned by PacketGetNetInfo()
* in order to skip non IPv4 (i.e. IPv6 addresses)
*/
*netp &= *maskp;
return (0);
}
-
+
}
*netp = *maskp = 0;
return (0);
}
-#endif /* !WIN32 && !MSDOS */
+#endif /* !_WIN32 && !MSDOS */
projects / libpcap / blobdiff