| /* |
| * iproute.c "ip route". |
| * |
| * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
| * |
| * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| * |
| * |
| * Changes: |
| * |
| * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses |
| * Kunihiro Ishiguro <kunihiro@zebra.org> 001102: rtnh_ifindex was not initialized |
| */ |
| |
| #include <sys/socket.h> |
| |
| #include <stdlib.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| |
| #include "rt_names.h" |
| #include "utils.h" |
| |
| #include "libbb.h" |
| |
| #ifndef RTAX_RTTVAR |
| #define RTAX_RTTVAR RTAX_HOPS |
| #endif |
| |
| |
| static struct |
| { |
| int tb; |
| int flushed; |
| char *flushb; |
| int flushp; |
| int flushe; |
| struct rtnl_handle *rth; |
| int protocol, protocolmask; |
| int scope, scopemask; |
| int type, typemask; |
| int tos, tosmask; |
| int iif, iifmask; |
| int oif, oifmask; |
| int realm, realmmask; |
| inet_prefix rprefsrc; |
| inet_prefix rvia; |
| inet_prefix rdst; |
| inet_prefix mdst; |
| inet_prefix rsrc; |
| inet_prefix msrc; |
| } filter; |
| |
| static int flush_update(void) |
| { |
| if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) { |
| perror("Failed to send flush request\n"); |
| return -1; |
| } |
| filter.flushp = 0; |
| return 0; |
| } |
| |
| static int print_route(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) |
| { |
| FILE *fp = (FILE*)arg; |
| struct rtmsg *r = NLMSG_DATA(n); |
| int len = n->nlmsg_len; |
| struct rtattr * tb[RTA_MAX+1]; |
| char abuf[256]; |
| inet_prefix dst; |
| inet_prefix src; |
| int host_len = -1; |
| SPRINT_BUF(b1); |
| |
| |
| if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) { |
| fprintf(stderr, "Not a route: %08x %08x %08x\n", |
| n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags); |
| return 0; |
| } |
| if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE) |
| return 0; |
| len -= NLMSG_LENGTH(sizeof(*r)); |
| if (len < 0) { |
| bb_error_msg("wrong nlmsg len %d", len); |
| return -1; |
| } |
| |
| if (r->rtm_family == AF_INET6) |
| host_len = 128; |
| else if (r->rtm_family == AF_INET) |
| host_len = 32; |
| |
| if (r->rtm_family == AF_INET6) { |
| if (filter.tb) { |
| if (filter.tb < 0) { |
| if (!(r->rtm_flags&RTM_F_CLONED)) { |
| return 0; |
| } |
| } else { |
| if (r->rtm_flags&RTM_F_CLONED) { |
| return 0; |
| } |
| if (filter.tb == RT_TABLE_LOCAL) { |
| if (r->rtm_type != RTN_LOCAL) { |
| return 0; |
| } |
| } else if (filter.tb == RT_TABLE_MAIN) { |
| if (r->rtm_type == RTN_LOCAL) { |
| return 0; |
| } |
| } else { |
| return 0; |
| } |
| } |
| } |
| } else { |
| if (filter.tb > 0 && filter.tb != r->rtm_table) { |
| return 0; |
| } |
| } |
| if (filter.rdst.family && |
| (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len)) { |
| return 0; |
| } |
| if (filter.mdst.family && |
| (r->rtm_family != filter.mdst.family || |
| (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len))) { |
| return 0; |
| } |
| if (filter.rsrc.family && |
| (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len)) { |
| return 0; |
| } |
| if (filter.msrc.family && |
| (r->rtm_family != filter.msrc.family || |
| (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len))) { |
| return 0; |
| } |
| |
| memset(tb, 0, sizeof(tb)); |
| parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len); |
| |
| if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen)) |
| return 0; |
| if (filter.mdst.family && filter.mdst.bitlen >= 0 && |
| inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len)) |
| return 0; |
| |
| if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen)) |
| return 0; |
| if (filter.msrc.family && filter.msrc.bitlen >= 0 && |
| inet_addr_match(&src, &filter.msrc, r->rtm_src_len)) |
| return 0; |
| |
| if (filter.flushb && |
| r->rtm_family == AF_INET6 && |
| r->rtm_dst_len == 0 && |
| r->rtm_type == RTN_UNREACHABLE && |
| tb[RTA_PRIORITY] && |
| *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1) |
| return 0; |
| |
| if (filter.flushb) { |
| struct nlmsghdr *fn; |
| if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) { |
| if (flush_update()) |
| return -1; |
| } |
| fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp)); |
| memcpy(fn, n, n->nlmsg_len); |
| fn->nlmsg_type = RTM_DELROUTE; |
| fn->nlmsg_flags = NLM_F_REQUEST; |
| fn->nlmsg_seq = ++filter.rth->seq; |
| filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb; |
| filter.flushed++; |
| return 0; |
| } |
| |
| if (n->nlmsg_type == RTM_DELROUTE) { |
| fprintf(fp, "Deleted "); |
| } |
| if (r->rtm_type != RTN_UNICAST && !filter.type) { |
| fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1))); |
| } |
| |
| if (tb[RTA_DST]) { |
| if (r->rtm_dst_len != host_len) { |
| fprintf(fp, "%s/%u ", rt_addr_n2a(r->rtm_family, |
| RTA_PAYLOAD(tb[RTA_DST]), |
| RTA_DATA(tb[RTA_DST]), |
| abuf, sizeof(abuf)), |
| r->rtm_dst_len |
| ); |
| } else { |
| fprintf(fp, "%s ", format_host(r->rtm_family, |
| RTA_PAYLOAD(tb[RTA_DST]), |
| RTA_DATA(tb[RTA_DST]), |
| abuf, sizeof(abuf)) |
| ); |
| } |
| } else if (r->rtm_dst_len) { |
| fprintf(fp, "0/%d ", r->rtm_dst_len); |
| } else { |
| fprintf(fp, "default "); |
| } |
| if (tb[RTA_SRC]) { |
| if (r->rtm_src_len != host_len) { |
| fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family, |
| RTA_PAYLOAD(tb[RTA_SRC]), |
| RTA_DATA(tb[RTA_SRC]), |
| abuf, sizeof(abuf)), |
| r->rtm_src_len |
| ); |
| } else { |
| fprintf(fp, "from %s ", format_host(r->rtm_family, |
| RTA_PAYLOAD(tb[RTA_SRC]), |
| RTA_DATA(tb[RTA_SRC]), |
| abuf, sizeof(abuf)) |
| ); |
| } |
| } else if (r->rtm_src_len) { |
| fprintf(fp, "from 0/%u ", r->rtm_src_len); |
| } |
| if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) { |
| fprintf(fp, "via %s ", |
| format_host(r->rtm_family, |
| RTA_PAYLOAD(tb[RTA_GATEWAY]), |
| RTA_DATA(tb[RTA_GATEWAY]), |
| abuf, sizeof(abuf))); |
| } |
| if (tb[RTA_OIF] && filter.oifmask != -1) { |
| fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF]))); |
| } |
| |
| if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) { |
| /* Do not use format_host(). It is our local addr |
| and symbolic name will not be useful. |
| */ |
| fprintf(fp, " src %s ", |
| rt_addr_n2a(r->rtm_family, |
| RTA_PAYLOAD(tb[RTA_PREFSRC]), |
| RTA_DATA(tb[RTA_PREFSRC]), |
| abuf, sizeof(abuf))); |
| } |
| if (tb[RTA_PRIORITY]) { |
| fprintf(fp, " metric %d ", *(__u32*)RTA_DATA(tb[RTA_PRIORITY])); |
| } |
| if (r->rtm_family == AF_INET6) { |
| struct rta_cacheinfo *ci = NULL; |
| if (tb[RTA_CACHEINFO]) { |
| ci = RTA_DATA(tb[RTA_CACHEINFO]); |
| } |
| if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) { |
| static int hz; |
| if (!hz) { |
| hz = get_hz(); |
| } |
| if (r->rtm_flags & RTM_F_CLONED) { |
| fprintf(fp, "%s cache ", _SL_); |
| } |
| if (ci->rta_expires) { |
| fprintf(fp, " expires %dsec", ci->rta_expires/hz); |
| } |
| if (ci->rta_error != 0) { |
| fprintf(fp, " error %d", ci->rta_error); |
| } |
| } else if (ci) { |
| if (ci->rta_error != 0) |
| fprintf(fp, " error %d", ci->rta_error); |
| } |
| } |
| if (tb[RTA_IIF] && filter.iifmask != -1) { |
| fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF]))); |
| } |
| fprintf(fp, "\n"); |
| fflush(fp); |
| return 0; |
| } |
| |
| static int iproute_modify(int cmd, unsigned flags, int argc, char **argv) |
| { |
| struct rtnl_handle rth; |
| struct { |
| struct nlmsghdr n; |
| struct rtmsg r; |
| char buf[1024]; |
| } req; |
| char mxbuf[256]; |
| struct rtattr * mxrta = (void*)mxbuf; |
| unsigned mxlock = 0; |
| char *d = NULL; |
| int gw_ok = 0; |
| int dst_ok = 0; |
| int proto_ok = 0; |
| int type_ok = 0; |
| |
| memset(&req, 0, sizeof(req)); |
| |
| req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
| req.n.nlmsg_flags = NLM_F_REQUEST|flags; |
| req.n.nlmsg_type = cmd; |
| req.r.rtm_family = preferred_family; |
| req.r.rtm_table = RT_TABLE_MAIN; |
| req.r.rtm_scope = RT_SCOPE_NOWHERE; |
| |
| if (cmd != RTM_DELROUTE) { |
| req.r.rtm_protocol = RTPROT_BOOT; |
| req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
| req.r.rtm_type = RTN_UNICAST; |
| } |
| |
| mxrta->rta_type = RTA_METRICS; |
| mxrta->rta_len = RTA_LENGTH(0); |
| |
| while (argc > 0) { |
| if (strcmp(*argv, "src") == 0) { |
| inet_prefix addr; |
| NEXT_ARG(); |
| get_addr(&addr, *argv, req.r.rtm_family); |
| if (req.r.rtm_family == AF_UNSPEC) { |
| req.r.rtm_family = addr.family; |
| } |
| addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen); |
| } else if (strcmp(*argv, "via") == 0) { |
| inet_prefix addr; |
| gw_ok = 1; |
| NEXT_ARG(); |
| get_addr(&addr, *argv, req.r.rtm_family); |
| if (req.r.rtm_family == AF_UNSPEC) { |
| req.r.rtm_family = addr.family; |
| } |
| addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen); |
| } else if (strcmp(*argv, "mtu") == 0) { |
| unsigned mtu; |
| NEXT_ARG(); |
| if (strcmp(*argv, "lock") == 0) { |
| mxlock |= (1<<RTAX_MTU); |
| NEXT_ARG(); |
| } |
| if (get_unsigned(&mtu, *argv, 0)) { |
| invarg("\"mtu\" value is invalid\n", *argv); |
| } |
| rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu); |
| } else if (matches(*argv, "protocol") == 0) { |
| int prot; |
| NEXT_ARG(); |
| if (rtnl_rtprot_a2n(&prot, *argv)) |
| invarg("\"protocol\" value is invalid\n", *argv); |
| req.r.rtm_protocol = prot; |
| proto_ok =1; |
| } else if (strcmp(*argv, "dev") == 0 || |
| strcmp(*argv, "oif") == 0) { |
| NEXT_ARG(); |
| d = *argv; |
| } else { |
| int type; |
| inet_prefix dst; |
| |
| if (strcmp(*argv, "to") == 0) { |
| NEXT_ARG(); |
| } |
| if ((**argv < '0' || **argv > '9') && |
| rtnl_rtntype_a2n(&type, *argv) == 0) { |
| NEXT_ARG(); |
| req.r.rtm_type = type; |
| type_ok = 1; |
| } |
| |
| if (dst_ok) { |
| duparg2("to", *argv); |
| } |
| get_prefix(&dst, *argv, req.r.rtm_family); |
| if (req.r.rtm_family == AF_UNSPEC) { |
| req.r.rtm_family = dst.family; |
| } |
| req.r.rtm_dst_len = dst.bitlen; |
| dst_ok = 1; |
| if (dst.bytelen) { |
| addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen); |
| } |
| } |
| argc--; argv++; |
| } |
| |
| if (rtnl_open(&rth, 0) < 0) { |
| exit(1); |
| } |
| |
| if (d) { |
| int idx; |
| |
| ll_init_map(&rth); |
| |
| if (d) { |
| if ((idx = ll_name_to_index(d)) == 0) { |
| bb_error_msg("Cannot find device \"%s\"", d); |
| return -1; |
| } |
| addattr32(&req.n, sizeof(req), RTA_OIF, idx); |
| } |
| } |
| |
| if (mxrta->rta_len > RTA_LENGTH(0)) { |
| if (mxlock) { |
| rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock); |
| } |
| addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta)); |
| } |
| |
| if (req.r.rtm_family == AF_UNSPEC) { |
| req.r.rtm_family = AF_INET; |
| } |
| |
| if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) { |
| exit(2); |
| } |
| |
| return 0; |
| } |
| |
| static int rtnl_rtcache_request(struct rtnl_handle *rth, int family) |
| { |
| struct { |
| struct nlmsghdr nlh; |
| struct rtmsg rtm; |
| } req; |
| struct sockaddr_nl nladdr; |
| |
| memset(&nladdr, 0, sizeof(nladdr)); |
| memset(&req, 0, sizeof(req)); |
| nladdr.nl_family = AF_NETLINK; |
| |
| req.nlh.nlmsg_len = sizeof(req); |
| req.nlh.nlmsg_type = RTM_GETROUTE; |
| req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST; |
| req.nlh.nlmsg_pid = 0; |
| req.nlh.nlmsg_seq = rth->dump = ++rth->seq; |
| req.rtm.rtm_family = family; |
| req.rtm.rtm_flags |= RTM_F_CLONED; |
| |
| return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr)); |
| } |
| |
| static int iproute_flush_cache(void) |
| { |
| #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush" |
| |
| int len; |
| int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY); |
| char *buffer = "-1"; |
| |
| if (flush_fd < 0) { |
| fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH); |
| return -1; |
| } |
| |
| len = strlen (buffer); |
| |
| if ((write (flush_fd, (void *)buffer, len)) < len) { |
| fprintf (stderr, "Cannot flush routing cache\n"); |
| return -1; |
| } |
| close(flush_fd); |
| return 0; |
| } |
| |
| static void iproute_reset_filter(void) |
| { |
| memset(&filter, 0, sizeof(filter)); |
| filter.mdst.bitlen = -1; |
| filter.msrc.bitlen = -1; |
| } |
| |
| static int iproute_list_or_flush(int argc, char **argv, int flush) |
| { |
| int do_ipv6 = preferred_family; |
| struct rtnl_handle rth; |
| char *id = NULL; |
| char *od = NULL; |
| |
| iproute_reset_filter(); |
| filter.tb = RT_TABLE_MAIN; |
| |
| if (flush && argc <= 0) { |
| fprintf(stderr, "\"ip route flush\" requires arguments.\n"); |
| return -1; |
| } |
| |
| while (argc > 0) { |
| if (matches(*argv, "protocol") == 0) { |
| int prot = 0; |
| NEXT_ARG(); |
| filter.protocolmask = -1; |
| if (rtnl_rtprot_a2n(&prot, *argv)) { |
| if (strcmp(*argv, "all") != 0) { |
| invarg("invalid \"protocol\"\n", *argv); |
| } |
| prot = 0; |
| filter.protocolmask = 0; |
| } |
| filter.protocol = prot; |
| } else if (strcmp(*argv, "dev") == 0 || |
| strcmp(*argv, "oif") == 0) { |
| NEXT_ARG(); |
| od = *argv; |
| } else if (strcmp(*argv, "iif") == 0) { |
| NEXT_ARG(); |
| id = *argv; |
| } else if (matches(*argv, "from") == 0) { |
| NEXT_ARG(); |
| if (matches(*argv, "root") == 0) { |
| NEXT_ARG(); |
| get_prefix(&filter.rsrc, *argv, do_ipv6); |
| } else if (matches(*argv, "match") == 0) { |
| NEXT_ARG(); |
| get_prefix(&filter.msrc, *argv, do_ipv6); |
| } else { |
| if (matches(*argv, "exact") == 0) { |
| NEXT_ARG(); |
| } |
| get_prefix(&filter.msrc, *argv, do_ipv6); |
| filter.rsrc = filter.msrc; |
| } |
| } else { |
| if (matches(*argv, "to") == 0) { |
| NEXT_ARG(); |
| } |
| if (matches(*argv, "root") == 0) { |
| NEXT_ARG(); |
| get_prefix(&filter.rdst, *argv, do_ipv6); |
| } else if (matches(*argv, "match") == 0) { |
| NEXT_ARG(); |
| get_prefix(&filter.mdst, *argv, do_ipv6); |
| } else if (matches(*argv, "table") == 0) { |
| NEXT_ARG(); |
| if (matches(*argv, "cache") == 0) { |
| filter.tb = -1; |
| } else if (matches(*argv, "main") != 0) { |
| invarg("invalid \"table\"", *argv); |
| } |
| } else if (matches(*argv, "cache") == 0) { |
| filter.tb = -1; |
| } else { |
| if (matches(*argv, "exact") == 0) { |
| NEXT_ARG(); |
| } |
| get_prefix(&filter.mdst, *argv, do_ipv6); |
| filter.rdst = filter.mdst; |
| } |
| } |
| argc--; argv++; |
| } |
| |
| if (do_ipv6 == AF_UNSPEC && filter.tb) { |
| do_ipv6 = AF_INET; |
| } |
| |
| if (rtnl_open(&rth, 0) < 0) { |
| exit(1); |
| } |
| |
| ll_init_map(&rth); |
| |
| if (id || od) { |
| int idx; |
| |
| if (id) { |
| if ((idx = ll_name_to_index(id)) == 0) { |
| bb_error_msg("Cannot find device \"%s\"", id); |
| return -1; |
| } |
| filter.iif = idx; |
| filter.iifmask = -1; |
| } |
| if (od) { |
| if ((idx = ll_name_to_index(od)) == 0) { |
| bb_error_msg("Cannot find device \"%s\"", od); |
| } |
| filter.oif = idx; |
| filter.oifmask = -1; |
| } |
| } |
| |
| if (flush) { |
| int _round = 0; |
| char flushb[4096-512]; |
| |
| if (filter.tb == -1) { |
| if (do_ipv6 != AF_INET6) |
| iproute_flush_cache(); |
| if (do_ipv6 == AF_INET) |
| return 0; |
| } |
| |
| filter.flushb = flushb; |
| filter.flushp = 0; |
| filter.flushe = sizeof(flushb); |
| filter.rth = &rth; |
| |
| for (;;) { |
| if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) { |
| perror("Cannot send dump request"); |
| return -1; |
| } |
| filter.flushed = 0; |
| if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) { |
| bb_error_msg("Flush terminated\n"); |
| return -1; |
| } |
| if (filter.flushed == 0) { |
| if (_round == 0) { |
| if (filter.tb != -1 || do_ipv6 == AF_INET6) |
| fprintf(stderr, "Nothing to flush.\n"); |
| } |
| fflush(stdout); |
| return 0; |
| } |
| _round++; |
| if (flush_update() < 0) |
| exit(1); |
| } |
| } |
| |
| if (filter.tb != -1) { |
| if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) { |
| bb_perror_msg_and_die("Cannot send dump request"); |
| } |
| } else { |
| if (rtnl_rtcache_request(&rth, do_ipv6) < 0) { |
| bb_perror_msg_and_die("Cannot send dump request"); |
| } |
| } |
| |
| if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) { |
| bb_error_msg_and_die("Dump terminated"); |
| } |
| |
| exit(0); |
| } |
| |
| |
| static int iproute_get(int argc, char **argv) |
| { |
| struct rtnl_handle rth; |
| struct { |
| struct nlmsghdr n; |
| struct rtmsg r; |
| char buf[1024]; |
| } req; |
| char *idev = NULL; |
| char *odev = NULL; |
| int connected = 0; |
| int from_ok = 0; |
| static const char * const options[] = |
| { "from", "iif", "oif", "dev", "notify", "connected", "to", 0 }; |
| |
| memset(&req, 0, sizeof(req)); |
| |
| iproute_reset_filter(); |
| |
| req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
| req.n.nlmsg_flags = NLM_F_REQUEST; |
| req.n.nlmsg_type = RTM_GETROUTE; |
| req.r.rtm_family = preferred_family; |
| req.r.rtm_table = 0; |
| req.r.rtm_protocol = 0; |
| req.r.rtm_scope = 0; |
| req.r.rtm_type = 0; |
| req.r.rtm_src_len = 0; |
| req.r.rtm_dst_len = 0; |
| req.r.rtm_tos = 0; |
| |
| while (argc > 0) { |
| switch (compare_string_array(options, *argv)) { |
| case 0: /* from */ |
| { |
| inet_prefix addr; |
| NEXT_ARG(); |
| from_ok = 1; |
| get_prefix(&addr, *argv, req.r.rtm_family); |
| if (req.r.rtm_family == AF_UNSPEC) { |
| req.r.rtm_family = addr.family; |
| } |
| if (addr.bytelen) { |
| addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen); |
| } |
| req.r.rtm_src_len = addr.bitlen; |
| break; |
| } |
| case 1: /* iif */ |
| NEXT_ARG(); |
| idev = *argv; |
| break; |
| case 2: /* oif */ |
| case 3: /* dev */ |
| NEXT_ARG(); |
| odev = *argv; |
| break; |
| case 4: /* notify */ |
| req.r.rtm_flags |= RTM_F_NOTIFY; |
| break; |
| case 5: /* connected */ |
| connected = 1; |
| break; |
| case 6: /* to */ |
| NEXT_ARG(); |
| default: |
| { |
| inet_prefix addr; |
| get_prefix(&addr, *argv, req.r.rtm_family); |
| if (req.r.rtm_family == AF_UNSPEC) { |
| req.r.rtm_family = addr.family; |
| } |
| if (addr.bytelen) { |
| addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen); |
| } |
| req.r.rtm_dst_len = addr.bitlen; |
| } |
| argc--; argv++; |
| } |
| } |
| |
| if (req.r.rtm_dst_len == 0) { |
| bb_error_msg_and_die("need at least destination address"); |
| } |
| |
| if (rtnl_open(&rth, 0) < 0) |
| exit(1); |
| |
| ll_init_map(&rth); |
| |
| if (idev || odev) { |
| int idx; |
| |
| if (idev) { |
| if ((idx = ll_name_to_index(idev)) == 0) { |
| bb_error_msg("Cannot find device \"%s\"", idev); |
| return -1; |
| } |
| addattr32(&req.n, sizeof(req), RTA_IIF, idx); |
| } |
| if (odev) { |
| if ((idx = ll_name_to_index(odev)) == 0) { |
| bb_error_msg("Cannot find device \"%s\"", odev); |
| return -1; |
| } |
| addattr32(&req.n, sizeof(req), RTA_OIF, idx); |
| } |
| } |
| |
| if (req.r.rtm_family == AF_UNSPEC) { |
| req.r.rtm_family = AF_INET; |
| } |
| |
| if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) { |
| exit(2); |
| } |
| |
| if (connected && !from_ok) { |
| struct rtmsg *r = NLMSG_DATA(&req.n); |
| int len = req.n.nlmsg_len; |
| struct rtattr * tb[RTA_MAX+1]; |
| |
| if (print_route(NULL, &req.n, (void*)stdout) < 0) { |
| bb_error_msg_and_die("An error :-)"); |
| } |
| |
| if (req.n.nlmsg_type != RTM_NEWROUTE) { |
| bb_error_msg("Not a route?"); |
| return -1; |
| } |
| len -= NLMSG_LENGTH(sizeof(*r)); |
| if (len < 0) { |
| bb_error_msg("Wrong len %d", len); |
| return -1; |
| } |
| |
| memset(tb, 0, sizeof(tb)); |
| parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len); |
| |
| if (tb[RTA_PREFSRC]) { |
| tb[RTA_PREFSRC]->rta_type = RTA_SRC; |
| r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]); |
| } else if (!tb[RTA_SRC]) { |
| bb_error_msg("Failed to connect the route"); |
| return -1; |
| } |
| if (!odev && tb[RTA_OIF]) { |
| tb[RTA_OIF]->rta_type = 0; |
| } |
| if (tb[RTA_GATEWAY]) { |
| tb[RTA_GATEWAY]->rta_type = 0; |
| } |
| if (!idev && tb[RTA_IIF]) { |
| tb[RTA_IIF]->rta_type = 0; |
| } |
| req.n.nlmsg_flags = NLM_F_REQUEST; |
| req.n.nlmsg_type = RTM_GETROUTE; |
| |
| if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) { |
| exit(2); |
| } |
| } |
| |
| if (print_route(NULL, &req.n, (void*)stdout) < 0) { |
| bb_error_msg_and_die("An error :-)"); |
| } |
| |
| exit(0); |
| } |
| |
| int do_iproute(int argc, char **argv) |
| { |
| static const char * const ip_route_commands[] = |
| { "add", "append", "change", "chg", "delete", "del", "get", |
| "list", "show", "prepend", "replace", "test", "flush", 0 }; |
| int command_num = 7; |
| unsigned int flags = 0; |
| int cmd = RTM_NEWROUTE; |
| |
| if (*argv) { |
| command_num = compare_string_array(ip_route_commands, *argv); |
| } |
| switch(command_num) { |
| case 0: /* add*/ |
| flags = NLM_F_CREATE|NLM_F_EXCL; |
| break; |
| case 1: /* append */ |
| flags = NLM_F_CREATE|NLM_F_APPEND; |
| break; |
| case 2: /* change */ |
| case 3: /* chg */ |
| flags = NLM_F_REPLACE; |
| break; |
| case 4: /* delete */ |
| case 5: /* del */ |
| cmd = RTM_DELROUTE; |
| break; |
| case 6: /* get */ |
| return iproute_get(argc-1, argv+1); |
| case 7: /* list */ |
| case 8: /* show */ |
| return iproute_list_or_flush(argc-1, argv+1, 0); |
| case 9: /* prepend */ |
| flags = NLM_F_CREATE; |
| case 10: /* replace */ |
| flags = NLM_F_CREATE|NLM_F_REPLACE; |
| case 11: /* test */ |
| flags = NLM_F_EXCL; |
| case 12: /* flush */ |
| return iproute_list_or_flush(argc-1, argv+1, 1); |
| default: |
| bb_error_msg_and_die("Unknown command %s", *argv); |
| } |
| |
| return iproute_modify(cmd, flags, argc-1, argv+1); |
| } |