--- /dev/null
+/*
+ * Copyright (c) 1996, 1998-2005, 2007-2010
+ * Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+/*
+ * Suppress a warning w/ gcc on Digital UN*X.
+ * The system headers should really do this....
+ */
+#if defined(__osf__) && !defined(__cplusplus)
+struct mbuf;
+struct rtentry;
+#endif
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+#if defined(HAVE_SYS_SOCKIO_H) && !defined(SIOCGIFCONF)
+# include <sys/sockio.h>
+#endif
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#ifdef HAVE_STRING_H
+# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
+# include <memory.h>
+# endif
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#include <netdb.h>
+#include <errno.h>
+#ifdef _ISC
+# include <sys/stream.h>
+# include <sys/sioctl.h>
+# include <sys/stropts.h>
+# define STRSET(cmd, param, len) {strioctl.ic_cmd=(cmd);\
+ strioctl.ic_dp=(param);\
+ strioctl.ic_timout=0;\
+ strioctl.ic_len=(len);}
+#endif /* _ISC */
+#ifdef _MIPS
+# include <net/soioctl.h>
+#endif /* _MIPS */
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#ifdef HAVE_GETIFADDRS
+# include <ifaddrs.h>
+#endif
+
+#include "missing.h"
+#include "alloc.h"
+#include "error.h"
+#include "sudo_debug.h"
+
+#define DEFAULT_TEXT_DOMAIN "sudo"
+#include "gettext.h"
+
+/* Minix apparently lacks IFF_LOOPBACK */
+#ifndef IFF_LOOPBACK
+# define IFF_LOOPBACK 0
+#endif
+
+#ifndef INET6_ADDRSTRLEN
+# define INET6_ADDRSTRLEN 46
+#endif
+
+#ifdef HAVE_GETIFADDRS
+
+/*
+ * Fill in the interfaces string with the machine's ip addresses and netmasks
+ * and return the number of interfaces found.
+ */
+int
+get_net_ifs(char **addrinfo)
+{
+ struct ifaddrs *ifa, *ifaddrs;
+ struct sockaddr_in *sin;
+#ifdef HAVE_STRUCT_IN6_ADDR
+ struct sockaddr_in6 *sin6;
+ char addrbuf[INET6_ADDRSTRLEN];
+#endif
+ int ailen, i, len, num_interfaces = 0;
+ char *cp;
+ debug_decl(get_net_ifs, SUDO_DEBUG_NETIF)
+
+ if (getifaddrs(&ifaddrs))
+ debug_return_int(0);
+
+ /* Allocate space for the interfaces info string. */
+ for (ifa = ifaddrs; ifa != NULL; ifa = ifa -> ifa_next) {
+ /* Skip interfaces marked "down" and "loopback". */
+ if (ifa->ifa_addr == NULL || ifa->ifa_netmask == NULL ||
+ !ISSET(ifa->ifa_flags, IFF_UP) || ISSET(ifa->ifa_flags, IFF_LOOPBACK))
+ continue;
+
+ switch (ifa->ifa_addr->sa_family) {
+ case AF_INET:
+#ifdef HAVE_STRUCT_IN6_ADDR
+ case AF_INET6:
+#endif
+ num_interfaces++;
+ break;
+ }
+ }
+ if (num_interfaces == 0)
+ debug_return_int(0);
+ ailen = num_interfaces * 2 * INET6_ADDRSTRLEN;
+ *addrinfo = cp = emalloc(ailen);
+
+ /* Store the IP addr/netmask pairs. */
+ for (ifa = ifaddrs, i = 0; ifa != NULL; ifa = ifa -> ifa_next) {
+ /* Skip interfaces marked "down" and "loopback". */
+ if (ifa->ifa_addr == NULL || ifa->ifa_netmask == NULL ||
+ !ISSET(ifa->ifa_flags, IFF_UP) || ISSET(ifa->ifa_flags, IFF_LOOPBACK))
+ continue;
+
+ switch (ifa->ifa_addr->sa_family) {
+ case AF_INET:
+ sin = (struct sockaddr_in *)ifa->ifa_addr;
+ len = snprintf(cp, ailen - (*addrinfo - cp),
+ "%s%s/", cp == *addrinfo ? "" : " ",
+ inet_ntoa(sin->sin_addr));
+ if (len <= 0 || len >= ailen - (*addrinfo - cp)) {
+ warningx(_("load_interfaces: overflow detected"));
+ goto done;
+ }
+ cp += len;
+
+ sin = (struct sockaddr_in *)ifa->ifa_netmask;
+ len = snprintf(cp, ailen - (*addrinfo - cp),
+ "%s", inet_ntoa(sin->sin_addr));
+ if (len <= 0 || len >= ailen - (*addrinfo - cp)) {
+ warningx(_("load_interfaces: overflow detected"));
+ goto done;
+ }
+ cp += len;
+ break;
+#ifdef HAVE_STRUCT_IN6_ADDR
+ case AF_INET6:
+ sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
+ inet_ntop(AF_INET6, &sin6->sin6_addr, addrbuf, sizeof(addrbuf));
+ len = snprintf(cp, ailen - (*addrinfo - cp),
+ "%s%s/", cp == *addrinfo ? "" : " ", addrbuf);
+ if (len <= 0 || len >= ailen - (*addrinfo - cp)) {
+ warningx(_("load_interfaces: overflow detected"));
+ goto done;
+ }
+ cp += len;
+
+ sin6 = (struct sockaddr_in6 *)ifa->ifa_netmask;
+ inet_ntop(AF_INET6, &sin6->sin6_addr, addrbuf, sizeof(addrbuf));
+ len = snprintf(cp, ailen - (*addrinfo - cp), "%s", addrbuf);
+ if (len <= 0 || len >= ailen - (*addrinfo - cp)) {
+ warningx(_("load_interfaces: overflow detected"));
+ goto done;
+ }
+ cp += len;
+ break;
+#endif /* HAVE_STRUCT_IN6_ADDR */
+ }
+ }
+
+done:
+#ifdef HAVE_FREEIFADDRS
+ freeifaddrs(ifaddrs);
+#else
+ efree(ifaddrs);
+#endif
+ debug_return_int(num_interfaces);
+}
+
+#elif defined(SIOCGIFCONF) && !defined(STUB_LOAD_INTERFACES)
+
+/*
+ * Allocate and fill in the interfaces global variable with the
+ * machine's ip addresses and netmasks.
+ */
+int
+get_net_ifs(char **addrinfo)
+{
+ struct ifconf *ifconf;
+ struct ifreq *ifr, ifr_tmp;
+ struct sockaddr_in *sin;
+ int ailen, i, len, n, sock, num_interfaces = 0;
+ size_t buflen = sizeof(struct ifconf) + BUFSIZ;
+ char *cp, *previfname = "", *ifconf_buf = NULL;
+#ifdef _ISC
+ struct strioctl strioctl;
+#endif /* _ISC */
+ debug_decl(get_net_ifs, SUDO_DEBUG_NETIF)
+
+ sock = socket(AF_INET, SOCK_DGRAM, 0);
+ if (sock < 0)
+ error(1, _("unable to open socket"));
+
+ /*
+ * Get interface configuration or return.
+ */
+ for (;;) {
+ ifconf_buf = emalloc(buflen);
+ ifconf = (struct ifconf *) ifconf_buf;
+ ifconf->ifc_len = buflen - sizeof(struct ifconf);
+ ifconf->ifc_buf = (caddr_t) (ifconf_buf + sizeof(struct ifconf));
+
+#ifdef _ISC
+ STRSET(SIOCGIFCONF, (caddr_t) ifconf, buflen);
+ if (ioctl(sock, I_STR, (caddr_t) &strioctl) < 0)
+#else
+ /* Note that some kernels return EINVAL if the buffer is too small */
+ if (ioctl(sock, SIOCGIFCONF, (caddr_t) ifconf) < 0 && errno != EINVAL)
+#endif /* _ISC */
+ goto done;
+
+ /* Break out of loop if we have a big enough buffer. */
+ if (ifconf->ifc_len + sizeof(struct ifreq) < buflen)
+ break;
+ buflen += BUFSIZ;
+ efree(ifconf_buf);
+ }
+
+ /* Allocate space for the maximum number of interfaces that could exist. */
+ if ((n = ifconf->ifc_len / sizeof(struct ifreq)) == 0)
+ debug_return_int(0);
+ ailen = n * 2 * INET6_ADDRSTRLEN;
+ *addrinfo = cp = emalloc(ailen);
+
+ /* For each interface, store the ip address and netmask. */
+ for (i = 0; i < ifconf->ifc_len; ) {
+ /* Get a pointer to the current interface. */
+ ifr = (struct ifreq *) &ifconf->ifc_buf[i];
+
+ /* Set i to the subscript of the next interface. */
+ i += sizeof(struct ifreq);
+#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
+ if (ifr->ifr_addr.sa_len > sizeof(ifr->ifr_addr))
+ i += ifr->ifr_addr.sa_len - sizeof(struct sockaddr);
+#endif /* HAVE_STRUCT_SOCKADDR_SA_LEN */
+
+ /* Skip duplicates and interfaces with NULL addresses. */
+ sin = (struct sockaddr_in *) &ifr->ifr_addr;
+ if (sin->sin_addr.s_addr == 0 ||
+ strncmp(previfname, ifr->ifr_name, sizeof(ifr->ifr_name) - 1) == 0)
+ continue;
+
+ if (ifr->ifr_addr.sa_family != AF_INET)
+ continue;
+
+#ifdef SIOCGIFFLAGS
+ memset(&ifr_tmp, 0, sizeof(ifr_tmp));
+ strncpy(ifr_tmp.ifr_name, ifr->ifr_name, sizeof(ifr_tmp.ifr_name) - 1);
+ if (ioctl(sock, SIOCGIFFLAGS, (caddr_t) &ifr_tmp) < 0)
+#endif
+ ifr_tmp = *ifr;
+
+ /* Skip interfaces marked "down" and "loopback". */
+ if (!ISSET(ifr_tmp.ifr_flags, IFF_UP) ||
+ ISSET(ifr_tmp.ifr_flags, IFF_LOOPBACK))
+ continue;
+
+ sin = (struct sockaddr_in *) &ifr->ifr_addr;
+ len = snprintf(cp, ailen - (*addrinfo - cp),
+ "%s%s/", cp == *addrinfo ? "" : " ",
+ inet_ntoa(sin->sin_addr));
+ if (len <= 0 || len >= ailen - (*addrinfo - cp)) {
+ warningx(_("load_interfaces: overflow detected"));
+ goto done;
+ }
+ cp += len;
+
+ /* Stash the name of the interface we saved. */
+ previfname = ifr->ifr_name;
+
+ /* Get the netmask. */
+ memset(&ifr_tmp, 0, sizeof(ifr_tmp));
+ strncpy(ifr_tmp.ifr_name, ifr->ifr_name, sizeof(ifr_tmp.ifr_name) - 1);
+#ifdef _ISC
+ STRSET(SIOCGIFNETMASK, (caddr_t) &ifr_tmp, sizeof(ifr_tmp));
+ if (ioctl(sock, I_STR, (caddr_t) &strioctl) < 0) {
+#else
+ if (ioctl(sock, SIOCGIFNETMASK, (caddr_t) &ifr_tmp) < 0) {
+#endif /* _ISC */
+ sin = (struct sockaddr_in *) &ifr_tmp.ifr_addr;
+ sin->sin_addr.s_addr = htonl(IN_CLASSC_NET);
+ }
+ sin = (struct sockaddr_in *) &ifr_tmp.ifr_addr;
+ len = snprintf(cp, ailen - (*addrinfo - cp),
+ "%s", inet_ntoa(sin->sin_addr));
+ if (len <= 0 || len >= ailen - (*addrinfo - cp)) {
+ warningx(_("load_interfaces: overflow detected"));
+ goto done;
+ }
+ cp += len;
+ num_interfaces++;
+ }
+
+done:
+ efree(ifconf_buf);
+ (void) close(sock);
+
+ debug_return_int(num_interfaces);
+}
+
+#else /* !SIOCGIFCONF || STUB_LOAD_INTERFACES */
+
+/*
+ * Stub function for those without SIOCGIFCONF or getifaddrs()
+ */
+int
+get_net_ifs(char **addrinfo)
+{
+ debug_decl(get_net_ifs, SUDO_DEBUG_NETIF)
+ debug_return_int(0);
+}
+
+#endif /* SIOCGIFCONF && !STUB_LOAD_INTERFACES */
projects / debian / sudo / blobdiff