+/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
/*
* Copyright (c) 1994, 1995, 1996, 1997, 1998
* The Regents of the University of California. All rights reserved.
* SUCH DAMAGE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/libpcap/inet.c,v 1.38 2001-07-28 22:56:34 guy Exp $ (LBL)";
-#endif
-
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
+#ifdef _WIN32
+#include <pcap-stdinc.h>
+#else /* _WIN32 */
+
#include <sys/param.h>
+#ifndef MSDOS
#include <sys/file.h>
+#endif
#include <sys/ioctl.h>
#include <sys/socket.h>
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
-#include <sys/time.h> /* concession to AIX */
-struct mbuf;
-struct rtentry;
+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 <ctype.h>
#include <errno.h>
#include <memory.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#if !defined(_WIN32) && !defined(__BORLANDC__)
#include <unistd.h>
-#ifdef HAVE_IFADDRS_H
-#include <ifaddrs.h>
-#endif
+#endif /* !_WIN32 && !__BORLANDC__ */
#include "pcap-int.h"
#include "os-proto.h"
#endif
-/* Not all systems have IFF_LOOPBACK */
-#ifdef IFF_LOOPBACK
-#define ISLOOPBACK(p) ((p)->ifr_flags & IFF_LOOPBACK)
-#define ISLOOPBACK_IFA(p) ((p)->ifa_flags & IFF_LOOPBACK)
-#else
-#define ISLOOPBACK(p) ((p)->ifr_name[0] == 'l' && (p)->ifr_name[1] == 'o' && \
- (isdigit((p)->ifr_name[2]) || (p)->ifr_name[2] == '\0'))
-#define ISLOOPBACK_IFA(p) ((p)->ifa_name[0] == 'l' && (p)->ifa_name[1] == 'o' && \
- (isdigit((p)->ifa_name[2]) || (p)->ifa_name[2] == '\0'))
-#endif
+#if !defined(_WIN32) && !defined(MSDOS)
/*
* Return the name of a network interface attached to the system, or NULL
pcap_lookupdev(errbuf)
register char *errbuf;
{
-#ifdef HAVE_IFADDRS_H
- struct ifaddrs *ifap, *ifa, *mp;
- int n, minunit;
- char *cp;
+ pcap_if_t *alldevs;
/* for old BSD systems, including bsdi3 */
#ifndef IF_NAMESIZE
#define IF_NAMESIZE IFNAMSIZ
#endif
static char device[IF_NAMESIZE + 1];
+ char *ret;
- if (getifaddrs(&ifap) != 0) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "getifaddrs: %s", pcap_strerror(errno));
- return NULL;
- }
-
- mp = NULL;
- minunit = 666;
- for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
- const char *endcp;
-
- if ((ifa->ifa_flags & IFF_UP) == 0 || ISLOOPBACK_IFA(ifa))
- continue;
-
- endcp = ifa->ifa_name + strlen(ifa->ifa_name);
- for (cp = ifa->ifa_name; cp < endcp && !isdigit(*cp); ++cp)
- continue;
-
- if (isdigit (*cp)) {
- n = atoi(cp);
- } else {
- n = 0;
- }
- if (n < minunit) {
- minunit = n;
- mp = ifa;
- }
- }
- if (mp == NULL) {
- (void)strlcpy(errbuf, "no suitable device found",
- PCAP_ERRBUF_SIZE);
-#ifdef HAVE_FREEIFADDRS
- freeifaddrs(ifap);
-#else
- free(ifap);
-#endif
- return (NULL);
- }
-
- (void)strlcpy(device, mp->ifa_name, sizeof(device));
-#ifdef HAVE_FREEIFADDRS
- freeifaddrs(ifap);
-#else
- free(ifap);
-#endif
- return (device);
-#else
- register int fd, minunit, n;
- register char *cp;
- register struct ifreq *ifrp, *ifend, *ifnext, *mp;
- struct ifconf ifc;
- char *buf;
- struct ifreq ifr;
- static char device[sizeof(ifrp->ifr_name) + 1];
- unsigned buf_size;
-
- fd = socket(AF_INET, SOCK_DGRAM, 0);
- if (fd < 0) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "socket: %s", pcap_strerror(errno));
+ if (pcap_findalldevs(&alldevs, errbuf) == -1)
return (NULL);
- }
-
- buf_size = 8192;
-
- for (;;) {
- buf = malloc (buf_size);
- if (buf == NULL) {
- close (fd);
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "out of memory");
- return (NULL);
- }
-
- ifc.ifc_len = buf_size;
- ifc.ifc_buf = buf;
- memset (buf, 0, buf_size);
- if (ioctl(fd, SIOCGIFCONF, (char *)&ifc) < 0
- && errno != EINVAL) {
- free (buf);
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "SIOCGIFCONF: %s", pcap_strerror(errno));
- (void)close(fd);
- return (NULL);
- }
- if (ifc.ifc_len < buf_size)
- break;
- free (buf);
- buf_size *= 2;
- }
- ifrp = (struct ifreq *)buf;
- ifend = (struct ifreq *)(buf + ifc.ifc_len);
-
- mp = NULL;
- minunit = 666;
- for (; ifrp < ifend; ifrp = ifnext) {
- const char *endcp;
-
-#ifdef HAVE_SOCKADDR_SA_LEN
- n = ifrp->ifr_addr.sa_len + sizeof(ifrp->ifr_name);
- if (n < sizeof(*ifrp))
- ifnext = ifrp + 1;
- else
- ifnext = (struct ifreq *)((char *)ifrp + n);
- if (ifrp->ifr_addr.sa_family != AF_INET)
- continue;
-#else
- ifnext = ifrp + 1;
-#endif
+ if (alldevs == NULL || (alldevs->flags & PCAP_IF_LOOPBACK)) {
/*
- * Need a template to preserve address info that is
- * used below to locate the next entry. (Otherwise,
- * SIOCGIFFLAGS stomps over it because the requests
- * are returned in a union.)
+ * 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?
*/
- strncpy(ifr.ifr_name, ifrp->ifr_name, sizeof(ifr.ifr_name));
- if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifr) < 0) {
- if (errno == ENXIO)
- continue;
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "SIOCGIFFLAGS: %.*s: %s",
- (int)sizeof(ifr.ifr_name), ifr.ifr_name,
- pcap_strerror(errno));
- (void)close(fd);
- free (buf);
- return (NULL);
- }
-
- /* Must be up and not the loopback */
- if ((ifr.ifr_flags & IFF_UP) == 0 || ISLOOPBACK(&ifr))
- continue;
-
- endcp = ifrp->ifr_name + strlen(ifrp->ifr_name);
- for (cp = ifrp->ifr_name;
- cp < endcp && !isdigit((unsigned char)*cp); ++cp)
- continue;
-
- if (isdigit ((unsigned char)*cp)) {
- n = atoi(cp);
- } else {
- n = 0;
- }
- if (n < minunit) {
- minunit = n;
- mp = ifrp;
- }
- }
- (void)close(fd);
- if (mp == NULL) {
(void)strlcpy(errbuf, "no suitable device found",
PCAP_ERRBUF_SIZE);
- free(buf);
- return (NULL);
+ ret = NULL;
+ } else {
+ /*
+ * Return the name of the first device on the list.
+ */
+ (void)strlcpy(device, alldevs->name, sizeof(device));
+ ret = device;
}
- (void)strlcpy(device, mp->ifr_name, sizeof(device));
- free(buf);
- return (device);
-#endif
+ pcap_freealldevs(alldevs);
+ return (ret);
}
int
pcap_lookupnet(device, netp, maskp, errbuf)
- register char *device;
+ register const char *device;
register bpf_u_int32 *netp, *maskp;
register char *errbuf;
{
register int fd;
- register struct sockaddr_in *sin;
+ 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) {
+ 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_USB
+ || strstr(device, "usbmon") != NULL
+#endif
+#ifdef HAVE_SNF_API
+ || strstr(device, "snf") != NULL
+#endif
+ ) {
*netp = *maskp = 0;
return 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);
}
*netp &= *maskp;
return (0);
}
+
+#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)
+ register char *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
+ return NULL;
+ } else {
+ /*
+ * Windows NT (NT 4.0, W2K, WXP). Convert the names to UNICODE for backward compatibility
+ */
+ ULONG NameLength = 8192;
+ static WCHAR AdaptersName[8192];
+ char *tAstr;
+ WCHAR *tUstr;
+ WCHAR *TAdaptersName = (WCHAR*)malloc(8192 * sizeof(WCHAR));
+ int NAdapts = 0;
+
+ if(TAdaptersName == NULL)
+ {
+ (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, "memory allocation failure");
+ return NULL;
+ }
+
+ if ( !PacketGetAdapterNames((PTSTR)TAdaptersName,&NameLength) )
+ {
+ pcap_win32_err_to_str(GetLastError(), our_errbuf);
+ (void)pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE,
+ "PacketGetAdapterNames: %s", our_errbuf);
+ free(TAdaptersName);
+ return NULL;
+ }
+
+
+ tAstr = (char*)TAdaptersName;
+ tUstr = (WCHAR*)AdaptersName;
+
+ /*
+ * Convert and copy the device names
+ */
+ while(sscanf(tAstr, "%S", tUstr) > 0)
+ {
+ tAstr += strlen(tAstr) + 1;
+ tUstr += wcslen(tUstr) + 1;
+ NAdapts ++;
+ }
+
+ tAstr++;
+ *tUstr = 0;
+ tUstr++;
+
+ /*
+ * Copy the descriptions
+ */
+ while(NAdapts--)
+ {
+ char* tmp = (char*)tUstr;
+ strcpy(tmp, tAstr);
+ tmp += strlen(tAstr) + 1;
+ tUstr = (WCHAR*)tmp;
+ tAstr += strlen(tAstr) + 1;
+ }
+
+ free(TAdaptersName);
+ return (char *)(AdaptersName);
+ }
+}
+
+
+int
+pcap_lookupnet(device, netp, maskp, errbuf)
+ register const char *device;
+ 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)
+ */
+ npf_if_addr if_addrs[MAX_NETWORK_ADDRESSES];
+ LONG if_addr_size = 1;
+ struct sockaddr_in *t_addr;
+ unsigned int i;
+
+ if (!PacketGetNetInfoEx((void *)device, if_addrs, &if_addr_size)) {
+ *netp = *maskp = 0;
+ return (0);
+ }
+
+ for(i=0; i<MAX_NETWORK_ADDRESSES; i++)
+ {
+ if(if_addrs[i].IPAddress.ss_family == AF_INET)
+ {
+ t_addr = (struct sockaddr_in *) &(if_addrs[i].IPAddress);
+ *netp = t_addr->sin_addr.S_un.S_addr;
+ t_addr = (struct sockaddr_in *) &(if_addrs[i].SubnetMask);
+ *maskp = t_addr->sin_addr.S_un.S_addr;
+
+ *netp &= *maskp;
+ return (0);
+ }
+
+ }
+
+ *netp = *maskp = 0;
+ return (0);
+}
+
+#endif /* !_WIN32 && !MSDOS */
projects / libpcap / blobdiff