* SUCH DAMAGE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/libpcap/inet.c,v 1.44 2001-10-28 20:31:05 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_LIMITS_H
-#include <limits.h>
-#else
-#define INT_MAX 2147483647
-#endif
-#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(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
-
-/*
- * This is fun.
- *
- * In older BSD systems, socket addresses were fixed-length, and
- * "sizeof (struct sockaddr)" gave the size of the structure.
- * All addresses fit within a "struct sockaddr".
- *
- * In newer BSD systems, the socket address is variable-length, and
- * there's an "sa_len" field giving the length of the structure;
- * this allows socket addresses to be longer than 2 bytes of family
- * and 14 bytes of data.
- *
- * Some commercial UNIXes use the old BSD scheme, and some might use
- * the new BSD scheme.
- *
- * GNU libc uses neither scheme, but has an "SA_LEN()" macro that
- * determines the size based on the address family.
- */
-#ifndef SA_LEN
-#ifdef HAVE_SOCKADDR_SA_LEN
-#define SA_LEN(addr) ((addr)->sa_len)
-#else /* HAVE_SOCKADDR_SA_LEN */
-#define SA_LEN(addr) (sizeof (struct sockaddr))
-#endif /* HAVE_SOCKADDR_SA_LEN */
-#endif /* SA_LEN */
-
-/*
- * Description string for the "any" device.
- */
-static const char any_descr[] = "Pseudo-device that captures on all interfaces";
-
-static struct sockaddr *
-dup_sockaddr(struct sockaddr *sa)
-{
- struct sockaddr *newsa;
- unsigned int size;
-
- size = SA_LEN(sa);
- if ((newsa = malloc(size)) == NULL)
- return (NULL);
- return (memcpy(newsa, sa, size));
-}
-
-static int
-get_instance(char *name)
-{
- 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);
-}
-
-static int
-add_or_find_if(pcap_if_t **curdev_ret, pcap_if_t **alldevs, char *name,
- u_int flags, const char *description, char *errbuf)
-{
- pcap_t *p;
- pcap_if_t *curdev, *prevdev, *nextdev;
- int this_instance;
-
- /*
- * Can we open this interface for live capture?
- */
- 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);
-
- /*
- * 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.
- * 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 = malloc(strlen(name) + 1);
- strcpy(curdev->name, name);
- if (description != NULL) {
- /*
- * We have a description for this interface.
- */
- curdev->description = malloc(strlen(description) + 1);
- strcpy(curdev->description, description);
- } 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);
-}
-
-static int
-add_addr_to_iflist(pcap_if_t **alldevs, char *name, u_int flags,
- struct sockaddr *addr, struct sockaddr *netmask,
- struct sockaddr *broadaddr, struct sockaddr *dstaddr, 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);
- 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);
- if (curaddr->netmask == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- free(curaddr);
- return (-1);
- }
- } else
- curaddr->netmask = NULL;
-
- if (broadaddr != NULL) {
- curaddr->broadaddr = dup_sockaddr(broadaddr);
- if (curaddr->broadaddr == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- free(curaddr);
- return (-1);
- }
- } else
- curaddr->broadaddr = NULL;
-
- if (dstaddr != NULL) {
- curaddr->dstaddr = dup_sockaddr(dstaddr);
- if (curaddr->dstaddr == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- 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);
-}
-
-static int
-pcap_add_if(pcap_if_t **devlist, 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));
-}
-
-/*
- * Get a list of all interfaces that are up and that we can open.
- * Returns -1 on error, 0 otherwise.
- * The list, as returned through "alldevsp", may be null if no interfaces
- * were up and could be opened.
- */
-#ifdef HAVE_IFADDRS_H
-int
-pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
-{
- pcap_if_t *devlist = NULL;
- struct ifaddrs *ifap, *ifa;
- struct sockaddr *broadaddr, *dstaddr;
- int ret = 0;
-
- /*
- * Get the list of interface addresses.
- *
- * Note: this won't return information about interfaces
- * with no addresses; are there any such interfaces
- * that would be capable of receiving packets?
- * (Interfaces incapable of receiving packets aren't
- * very interesting from libpcap's point of view.)
- *
- * LAN interfaces will probably have link-layer
- * addresses; I don't know whether all implementations
- * of "getifaddrs()" now, or in the future, will return
- * those.
- */
- if (getifaddrs(&ifap) != 0) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "getifaddrs: %s", pcap_strerror(errno));
- return (-1);
- }
- for (ifa = ifap; ifa != NULL; ifa = ifa->ifa_next) {
- /*
- * Is this interface up?
- */
- if (!(ifa->ifa_flags & IFF_UP)) {
- /*
- * No, so don't add it to the list.
- */
- continue;
- }
-
- /*
- * "ifa_broadaddr" may be non-null even on
- * non-broadcast interfaces; "ifa_dstaddr"
- * was, on at least one FreeBSD 4.1 system,
- * non-null on a non-point-to-point
- * interface.
- */
- if (ifa->ifa_flags & IFF_BROADCAST)
- broadaddr = ifa->ifa_broadaddr;
- else
- broadaddr = NULL;
- if (ifa->ifa_flags & IFF_POINTOPOINT)
- dstaddr = ifa->ifa_dstaddr;
- else
- dstaddr = NULL;
-
- /*
- * Add information for this address to the list.
- */
- if (add_addr_to_iflist(&devlist, ifa->ifa_name,
- ifa->ifa_flags, ifa->ifa_addr, ifa->ifa_netmask,
- broadaddr, dstaddr, errbuf) < 0) {
- ret = -1;
- break;
- }
- }
-
- freeifaddrs(ifap);
-
- if (ret != -1) {
- /*
- * We haven't had any errors yet; add the "any" device,
- * if we can open it.
- */
- if (pcap_add_if(&devlist, "any", 0, any_descr, errbuf) < 0)
- ret = -1;
- }
-
- if (ret == -1) {
- /*
- * We had an error; free the list we've been constructing.
- */
- if (devlist != NULL) {
- pcap_freealldevs(devlist);
- devlist = NULL;
- }
- }
-
- *alldevsp = devlist;
- return (ret);
-}
-#else /* HAVE_IFADDRS_H */
-#ifdef HAVE_PROC_NET_DEV
-/*
- * Get from "/proc/net/dev" all interfaces listed there; if they're
- * already in the list of interfaces we have, that won't add another
- * instance, but if they're not, that'll add them.
- *
- * We don't bother getting any addresses for them; it appears you can't
- * use SIOCGIFADDR on Linux to get IPv6 addresses for interfaces, and,
- * although some other types of addresses can be fetched with SIOCGIFADDR,
- * we don't bother with them for now.
- *
- * We also don't fail if we couldn't open "/proc/net/dev"; we just leave
- * the list of interfaces as is.
- */
-static int
-scan_proc_net_dev(pcap_if_t **devlistp, int fd, char *errbuf)
-{
- FILE *proc_net_f;
- char linebuf[512];
- int linenum;
- unsigned char *p;
- char name[512]; /* XXX - pick a size */
- char *q, *saveq;
- struct ifreq ifrflags;
- int ret = 0;
-
- proc_net_f = fopen("/proc/net/dev", "r");
- if (proc_net_f == NULL)
- return (0);
-
- for (linenum = 1;
- fgets(linebuf, sizeof linebuf, proc_net_f) != NULL; linenum++) {
- /*
- * Skip the first two lines - they're headers.
- */
- if (linenum <= 2)
- continue;
-
- p = &linebuf[0];
-
- /*
- * Skip leading white space.
- */
- while (*p != '\0' && isspace(*p))
- p++;
- if (*p == '\0' || *p == '\n')
- continue; /* blank line */
-
- /*
- * Get the interface name.
- */
- q = &name[0];
- while (*p != '\0' && !isspace(*p)) {
- if (*p == ':') {
- /*
- * This could be the separator between a
- * name and an alias number, or it could be
- * the separator between a name with no
- * alias number and the next field.
- *
- * If there's a colon after digits, it
- * separates the name and the alias number,
- * otherwise it separates the name and the
- * next field.
- */
- saveq = q;
- while (isdigit(*p))
- *q++ = *p++;
- if (*p != ':') {
- /*
- * That was the next field,
- * not the alias number.
- */
- q = saveq;
- }
- break;
- } else
- *q++ = *p++;
- }
- *q = '\0';
-
- /*
- * Get the flags for this interface, and skip it if
- * it's not up.
- */
- strncpy(ifrflags.ifr_name, name, sizeof(ifrflags.ifr_name));
- if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifrflags) < 0) {
- if (errno == ENXIO)
- continue;
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "SIOCGIFFLAGS: %.*s: %s",
- (int)sizeof(ifrflags.ifr_name),
- ifrflags.ifr_name,
- pcap_strerror(errno));
- ret = -1;
- break;
- }
- if (!(ifrflags.ifr_flags & IFF_UP))
- continue;
-
- /*
- * Add an entry for this interface, with no addresses.
- */
- if (pcap_add_if(devlistp, name, ifrflags.ifr_flags, errbuf) == -1) {
- /*
- * Failure.
- */
- ret = -1;
- break;
- }
- }
- if (ret != -1) {
- /*
- * Well, we didn't fail for any other reason; did we
- * fail due to an error reading the file?
- */
- if (ferror(proc_net_f)) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "Error reading /proc/net/dev: %s",
- pcap_strerror(errno));
- ret = -1;
- }
- }
-
- (void)fclose(proc_net_f);
- return (ret);
-}
-#endif /* HAVE_PROC_NET_DEV */
-
-int
-pcap_findalldevs(pcap_if_t **alldevsp, char *errbuf)
-{
- pcap_if_t *devlist = NULL;
- register int fd;
- register struct ifreq *ifrp, *ifend, *ifnext;
- int n;
- struct ifconf ifc;
- char *buf = NULL;
- unsigned buf_size;
- struct ifreq ifrflags, ifrnetmask, ifrbroadaddr, ifrdstaddr;
- struct sockaddr *netmask, *broadaddr, *dstaddr;
- int ret = 0;
-
- /*
- * Create a socket from which to fetch the list of interfaces.
- */
- fd = socket(AF_INET, SOCK_DGRAM, 0);
- if (fd < 0) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "socket: %s", pcap_strerror(errno));
- return (-1);
- }
-
- /*
- * Start with an 8K buffer, and keep growing the buffer until
- * we get the entire interface list or fail to get it for some
- * reason other than EINVAL (which is presumed here to mean
- * "buffer is too small").
- */
- buf_size = 8192;
- for (;;) {
- buf = malloc(buf_size);
- if (buf == NULL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "malloc: %s", pcap_strerror(errno));
- (void)close(fd);
- return (-1);
- }
-
- ifc.ifc_len = buf_size;
- ifc.ifc_buf = buf;
- memset(buf, 0, buf_size);
- if (ioctl(fd, SIOCGIFCONF, (char *)&ifc) < 0
- && errno != EINVAL) {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "SIOCGIFCONF: %s", pcap_strerror(errno));
- (void)close(fd);
- free(buf);
- return (-1);
- }
- if (ifc.ifc_len < buf_size)
- break;
- free(buf);
- buf_size *= 2;
- }
-
- ifrp = (struct ifreq *)buf;
- ifend = (struct ifreq *)(buf + ifc.ifc_len);
-
- for (; ifrp < ifend; ifrp = ifnext) {
- n = SA_LEN(&ifrp->ifr_addr) + sizeof(ifrp->ifr_name);
- if (n < sizeof(*ifrp))
- ifnext = ifrp + 1;
- else
- ifnext = (struct ifreq *)((char *)ifrp + n);
-
- /*
- * Get the flags for this interface, and skip it if it's
- * not up.
- */
- strncpy(ifrflags.ifr_name, ifrp->ifr_name,
- sizeof(ifrflags.ifr_name));
- if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifrflags) < 0) {
- if (errno == ENXIO)
- continue;
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "SIOCGIFFLAGS: %.*s: %s",
- (int)sizeof(ifrflags.ifr_name),
- ifrflags.ifr_name,
- pcap_strerror(errno));
- ret = -1;
- break;
- }
- if (!(ifrflags.ifr_flags & IFF_UP))
- continue;
-
- /*
- * Get the netmask for this address on this interface.
- */
- strncpy(ifrnetmask.ifr_name, ifrp->ifr_name,
- sizeof(ifrnetmask.ifr_name));
- memcpy(&ifrnetmask.ifr_addr, &ifrp->ifr_addr,
- sizeof(ifrnetmask.ifr_addr));
- if (ioctl(fd, SIOCGIFNETMASK, (char *)&ifrnetmask) < 0) {
- if (errno == EADDRNOTAVAIL) {
- /*
- * Not available.
- */
- netmask = NULL;
- } else {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "SIOCGIFNETMASK: %.*s: %s",
- (int)sizeof(ifrnetmask.ifr_name),
- ifrnetmask.ifr_name,
- pcap_strerror(errno));
- ret = -1;
- break;
- }
- } else
- netmask = &ifrnetmask.ifr_addr;
-
- /*
- * Get the broadcast address for this address on this
- * interface (if any).
- */
- if (ifrflags.ifr_flags & IFF_BROADCAST) {
- strncpy(ifrbroadaddr.ifr_name, ifrp->ifr_name,
- sizeof(ifrbroadaddr.ifr_name));
- memcpy(&ifrbroadaddr.ifr_addr, &ifrp->ifr_addr,
- sizeof(ifrbroadaddr.ifr_addr));
- if (ioctl(fd, SIOCGIFBRDADDR,
- (char *)&ifrbroadaddr) < 0) {
- if (errno == EADDRNOTAVAIL) {
- /*
- * Not available.
- */
- broadaddr = NULL;
- } else {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "SIOCGIFBRDADDR: %.*s: %s",
- (int)sizeof(ifrbroadaddr.ifr_name),
- ifrbroadaddr.ifr_name,
- pcap_strerror(errno));
- ret = -1;
- break;
- }
- } else
- broadaddr = &ifrbroadaddr.ifr_broadaddr;
- } else {
- /*
- * Not a broadcast interface, so no broadcast
- * address.
- */
- broadaddr = NULL;
- }
-
- /*
- * Get the destination address for this address on this
- * interface (if any).
- */
- if (ifrflags.ifr_flags & IFF_POINTOPOINT) {
- strncpy(ifrdstaddr.ifr_name, ifrp->ifr_name,
- sizeof(ifrdstaddr.ifr_name));
- memcpy(&ifrdstaddr.ifr_addr, &ifrp->ifr_addr,
- sizeof(ifrdstaddr.ifr_addr));
- if (ioctl(fd, SIOCGIFDSTADDR,
- (char *)&ifrdstaddr) < 0) {
- if (errno == EADDRNOTAVAIL) {
- /*
- * Not available.
- */
- dstaddr = NULL;
- } else {
- (void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
- "SIOCGIFDSTADDR: %.*s: %s",
- (int)sizeof(ifrdstaddr.ifr_name),
- ifrdstaddr.ifr_name,
- pcap_strerror(errno));
- ret = -1;
- break;
- }
- } else
- dstaddr = &ifrdstaddr.ifr_dstaddr;
- } else
- dstaddr = NULL;
-
- /*
- * Add information for this address to the list.
- */
- if (add_addr_to_iflist(&devlist, ifrp->ifr_name,
- ifrflags.ifr_flags, &ifrp->ifr_addr,
- netmask, broadaddr, dstaddr, errbuf) < 0) {
- ret = -1;
- break;
- }
- }
- free(buf);
-
-#ifdef HAVE_PROC_NET_DEV
- if (ret != -1) {
- /*
- * We haven't had any errors yet; now read "/proc/net/dev",
- * and add to the list of interfaces all interfaces listed
- * there that we don't already have, because, on Linux,
- * SIOCGIFCONF reports only interfaces with IPv4 addresses,
- * so you need to read "/proc/net/dev" to get the names of
- * the rest of the interfaces.
- */
- ret = scan_proc_net_dev(&devlist, fd, errbuf);
- }
-#endif
- (void)close(fd);
-
- if (ret != -1) {
- /*
- * We haven't had any errors yet; add the "any" device,
- * if we can open it.
- */
- if (pcap_add_if(&devlist, "any", 0, any_descr, errbuf) < 0) {
- /*
- * Oops, we had a fatal error.
- */
- ret = -1;
- }
- }
-
- if (ret == -1) {
- /*
- * We had an error; free the list we've been constructing.
- */
- if (devlist != NULL) {
- pcap_freealldevs(devlist);
- devlist = NULL;
- }
- }
-
- *alldevsp = devlist;
- return (ret);
-}
-#endif /* HAVE_IFADDRS_H */
-
-/*
- * 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)
/*
* Return the name of a network interface attached to the system, or 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
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