/* -*- 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. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the Computer Systems * Engineering Group at Lawrence Berkeley Laboratory. * 4. Neither the name of the University nor of the Laboratory may be used * to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include #include #ifdef HAVE_SYS_SOCKIO_H #include #endif #include /* concession to AIX */ struct mbuf; /* Squelch compiler warnings on some platforms for */ struct rtentry; /* declarations in */ #include #include #include #include #include #include #include #include #include "pcap-int.h" #ifdef HAVE_OS_PROTO_H #include "os-proto.h" #endif /* * Only Solaris 10 uses this file. */ /* * 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. * * This is the implementation used on platforms that have SIOCGLIFCONF * but don't have "getifaddrs()". (Solaris 8 and later; we use * SIOCGLIFCONF rather than SIOCGIFCONF in order to get IPv6 addresses.) */ int pcapint_findalldevs_interfaces(pcap_if_list_t *devlistp, char *errbuf, int (*check_usable)(const char *), get_if_flags_func get_flags_func) { register int fd4, fd6, fd; register struct lifreq *ifrp, *ifend; struct lifnum ifn; struct lifconf ifc; char *buf = NULL; unsigned buf_size; #ifdef HAVE_SOLARIS char *p, *q; #endif struct lifreq ifrflags, ifrnetmask, ifrbroadaddr, ifrdstaddr; struct sockaddr *netmask, *broadaddr, *dstaddr; int ret = 0; /* * Create a socket from which to fetch the list of interfaces, * and from which to fetch IPv4 information. */ fd4 = socket(AF_INET, SOCK_DGRAM, 0); if (fd4 < 0) { pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, errno, "socket: AF_INET"); return (-1); } /* * Create a socket from which to fetch IPv6 information. */ fd6 = socket(AF_INET6, SOCK_DGRAM, 0); if (fd6 < 0) { pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, errno, "socket: AF_INET6"); (void)close(fd4); return (-1); } /* * How many entries will SIOCGLIFCONF return? */ ifn.lifn_family = AF_UNSPEC; ifn.lifn_flags = 0; ifn.lifn_count = 0; if (ioctl(fd4, SIOCGLIFNUM, (char *)&ifn) < 0) { pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, errno, "SIOCGLIFNUM"); (void)close(fd6); (void)close(fd4); return (-1); } /* * Allocate a buffer for those entries. */ buf_size = ifn.lifn_count * sizeof (struct lifreq); buf = malloc(buf_size); if (buf == NULL) { pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, errno, "malloc"); (void)close(fd6); (void)close(fd4); return (-1); } /* * Get the entries. */ ifc.lifc_len = buf_size; ifc.lifc_buf = buf; ifc.lifc_family = AF_UNSPEC; ifc.lifc_flags = 0; memset(buf, 0, buf_size); if (ioctl(fd4, SIOCGLIFCONF, (char *)&ifc) < 0) { pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, errno, "SIOCGLIFCONF"); (void)close(fd6); (void)close(fd4); free(buf); return (-1); } /* * Loop over the entries. */ ifrp = (struct lifreq *)buf; ifend = (struct lifreq *)(buf + ifc.lifc_len); for (; ifrp < ifend; ifrp++) { /* * Skip entries that begin with "dummy". * XXX - what are these? Is this Linux-specific? * Are there platforms on which we shouldn't do this? */ if (strncmp(ifrp->lifr_name, "dummy", 5) == 0) continue; /* * Can we capture on this device? */ if (!(*check_usable)(ifrp->lifr_name)) { /* * No. */ continue; } /* * IPv6 or not? */ if (((struct sockaddr *)&ifrp->lifr_addr)->sa_family == AF_INET6) fd = fd6; else fd = fd4; /* * Get the flags for this interface. */ strncpy(ifrflags.lifr_name, ifrp->lifr_name, sizeof(ifrflags.lifr_name)); if (ioctl(fd, SIOCGLIFFLAGS, (char *)&ifrflags) < 0) { if (errno == ENXIO) continue; pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, errno, "SIOCGLIFFLAGS: %.*s", (int)sizeof(ifrflags.lifr_name), ifrflags.lifr_name); ret = -1; break; } /* * Get the netmask for this address on this interface. */ strncpy(ifrnetmask.lifr_name, ifrp->lifr_name, sizeof(ifrnetmask.lifr_name)); memcpy(&ifrnetmask.lifr_addr, &ifrp->lifr_addr, sizeof(ifrnetmask.lifr_addr)); if (ioctl(fd, SIOCGLIFNETMASK, (char *)&ifrnetmask) < 0) { if (errno == EADDRNOTAVAIL) { /* * Not available. */ netmask = NULL; } else { pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, errno, "SIOCGLIFNETMASK: %.*s", (int)sizeof(ifrnetmask.lifr_name), ifrnetmask.lifr_name); ret = -1; break; } } else netmask = (struct sockaddr *)&ifrnetmask.lifr_addr; /* * Get the broadcast address for this address on this * interface (if any). */ if (ifrflags.lifr_flags & IFF_BROADCAST) { strncpy(ifrbroadaddr.lifr_name, ifrp->lifr_name, sizeof(ifrbroadaddr.lifr_name)); memcpy(&ifrbroadaddr.lifr_addr, &ifrp->lifr_addr, sizeof(ifrbroadaddr.lifr_addr)); if (ioctl(fd, SIOCGLIFBRDADDR, (char *)&ifrbroadaddr) < 0) { if (errno == EADDRNOTAVAIL) { /* * Not available. */ broadaddr = NULL; } else { pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, errno, "SIOCGLIFBRDADDR: %.*s", (int)sizeof(ifrbroadaddr.lifr_name), ifrbroadaddr.lifr_name); ret = -1; break; } } else broadaddr = (struct sockaddr *)&ifrbroadaddr.lifr_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.lifr_flags & IFF_POINTOPOINT) { strncpy(ifrdstaddr.lifr_name, ifrp->lifr_name, sizeof(ifrdstaddr.lifr_name)); memcpy(&ifrdstaddr.lifr_addr, &ifrp->lifr_addr, sizeof(ifrdstaddr.lifr_addr)); if (ioctl(fd, SIOCGLIFDSTADDR, (char *)&ifrdstaddr) < 0) { if (errno == EADDRNOTAVAIL) { /* * Not available. */ dstaddr = NULL; } else { pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE, errno, "SIOCGLIFDSTADDR: %.*s", (int)sizeof(ifrdstaddr.lifr_name), ifrdstaddr.lifr_name); ret = -1; break; } } else dstaddr = (struct sockaddr *)&ifrdstaddr.lifr_dstaddr; } else dstaddr = NULL; #ifdef HAVE_SOLARIS /* * If this entry has a colon followed by a number at * the end, it's a logical interface. Those are just * the way you assign multiple IP addresses to a real * interface, so an entry for a logical interface should * be treated like the entry for the real interface; * we do that by stripping off the ":" and the number. */ p = strchr(ifrp->lifr_name, ':'); if (p != NULL) { /* * We have a ":"; is it followed by a number? */ q = p + 1; while (PCAP_ISDIGIT(*q)) q++; if (*q == '\0') { /* * All digits after the ":" until the end. * Strip off the ":" and everything after * it. */ *p = '\0'; } } #endif /* * Add information for this address to the list. */ if (pcapint_add_addr_to_if(devlistp, ifrp->lifr_name, ifrflags.lifr_flags, get_flags_func, (struct sockaddr *)&ifrp->lifr_addr, sizeof (struct sockaddr_storage), netmask, sizeof (struct sockaddr_storage), broadaddr, sizeof (struct sockaddr_storage), dstaddr, sizeof (struct sockaddr_storage), errbuf) < 0) { ret = -1; break; } } free(buf); (void)close(fd6); (void)close(fd4); return (ret); }