/* Return value becomes exitcode. It's okay to not return at all */ static int ipaddr_modify(int cmd, int argc, char **argv) { static const char option[] ALIGN1 = "peer\0""remote\0""broadcast\0""brd\0" "anycast\0""scope\0""dev\0""label\0""local\0"; struct rtnl_handle rth; struct { struct nlmsghdr n; struct ifaddrmsg ifa; char buf[256]; } req; char *d = NULL; char *l = NULL; inet_prefix lcl; inet_prefix peer; int local_len = 0; int peer_len = 0; int brd_len = 0; int any_len = 0; bool scoped = 0; memset(&req, 0, sizeof(req)); req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); req.n.nlmsg_flags = NLM_F_REQUEST; req.n.nlmsg_type = cmd; req.ifa.ifa_family = preferred_family; while (argc > 0) { const int option_num = index_in_strings(option, *argv); switch (option_num) { case 0: /* peer */ case 1: /* remote */ NEXT_ARG(); if (peer_len) { duparg("peer", *argv); } get_prefix(&peer, *argv, req.ifa.ifa_family); peer_len = peer.bytelen; if (req.ifa.ifa_family == AF_UNSPEC) { req.ifa.ifa_family = peer.family; } addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen); req.ifa.ifa_prefixlen = peer.bitlen; break; case 2: /* broadcast */ case 3: /* brd */ { inet_prefix addr; NEXT_ARG(); if (brd_len) { duparg("broadcast", *argv); } if (LONE_CHAR(*argv, '+')) { brd_len = -1; } else if (LONE_DASH(*argv)) { brd_len = -2; } else { get_addr(&addr, *argv, req.ifa.ifa_family); if (req.ifa.ifa_family == AF_UNSPEC) req.ifa.ifa_family = addr.family; addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen); brd_len = addr.bytelen; } break; } case 4: /* anycast */ { inet_prefix addr; NEXT_ARG(); if (any_len) { duparg("anycast", *argv); } get_addr(&addr, *argv, req.ifa.ifa_family); if (req.ifa.ifa_family == AF_UNSPEC) { req.ifa.ifa_family = addr.family; } addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen); any_len = addr.bytelen; break; } case 5: /* scope */ { uint32_t scope = 0; NEXT_ARG(); if (rtnl_rtscope_a2n(&scope, *argv)) { invarg(*argv, "scope"); } req.ifa.ifa_scope = scope; scoped = 1; break; } case 6: /* dev */ NEXT_ARG(); d = *argv; break; case 7: /* label */ NEXT_ARG(); l = *argv; addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1); break; case 8: /* local */ NEXT_ARG(); default: if (local_len) { duparg2("local", *argv); } get_prefix(&lcl, *argv, req.ifa.ifa_family); if (req.ifa.ifa_family == AF_UNSPEC) { req.ifa.ifa_family = lcl.family; } addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen); local_len = lcl.bytelen; } argc--; argv++; } if (d == NULL) { bb_error_msg(bb_msg_requires_arg,"\"dev\""); return -1; } if (l && strncmp(d, l, strlen(d)) != 0) { bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s)", d, l); } if (peer_len == 0 && local_len && cmd != RTM_DELADDR) { peer = lcl; addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen); } if (req.ifa.ifa_prefixlen == 0) req.ifa.ifa_prefixlen = lcl.bitlen; if (brd_len < 0 && cmd != RTM_DELADDR) { inet_prefix brd; int i; if (req.ifa.ifa_family != AF_INET) { bb_error_msg_and_die("broadcast can be set only for IPv4 addresses"); } brd = peer; if (brd.bitlen <= 30) { for (i=31; i>=brd.bitlen; i--) { if (brd_len == -1) brd.data[0] |= htonl(1<<(31-i)); else brd.data[0] &= ~htonl(1<<(31-i)); } addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen); brd_len = brd.bytelen; } } if (!scoped && cmd != RTM_DELADDR) req.ifa.ifa_scope = default_scope(&lcl); xrtnl_open(&rth); ll_init_map(&rth); req.ifa.ifa_index = xll_name_to_index(d); if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) return 2; return 0; }
static int ipaddr_modify(int cmd, int argc, char **argv) { const char *option[] = { "peer", "remote", "broadcast", "brd", "anycast", "scope", "dev", "label", "local", 0 }; struct rtnl_handle rth; struct { struct nlmsghdr n; struct ifaddrmsg ifa; char buf[256]; } req; char *d = NULL; char *l = NULL; inet_prefix lcl; inet_prefix peer; int local_len = 0; int peer_len = 0; int brd_len = 0; int any_len = 0; int scoped = 0; memset(&req, 0, sizeof(req)); req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); req.n.nlmsg_flags = NLM_F_REQUEST; req.n.nlmsg_type = cmd; req.ifa.ifa_family = preferred_family; while (argc > 0) { const unsigned short option_num = compare_string_array(option, *argv); switch (option_num) { case 0: /* peer */ case 1: /* remote */ NEXT_ARG(); if (peer_len) { duparg("peer", *argv); } get_prefix(&peer, *argv, req.ifa.ifa_family); peer_len = peer.bytelen; if (req.ifa.ifa_family == AF_UNSPEC) { req.ifa.ifa_family = peer.family; } addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen); req.ifa.ifa_prefixlen = peer.bitlen; break; case 2: /* broadcast */ case 3: /* brd */ { inet_prefix addr; NEXT_ARG(); if (brd_len) { duparg("broadcast", *argv); } if (strcmp(*argv, "+") == 0) { brd_len = -1; } else if (strcmp(*argv, "-") == 0) { brd_len = -2; } else { get_addr(&addr, *argv, req.ifa.ifa_family); if (req.ifa.ifa_family == AF_UNSPEC) req.ifa.ifa_family = addr.family; addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen); brd_len = addr.bytelen; } break; } case 4: /* anycast */ { inet_prefix addr; NEXT_ARG(); if (any_len) { duparg("anycast", *argv); } get_addr(&addr, *argv, req.ifa.ifa_family); if (req.ifa.ifa_family == AF_UNSPEC) { req.ifa.ifa_family = addr.family; } addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen); any_len = addr.bytelen; break; } case 5: /* scope */ { int scope = 0; NEXT_ARG(); if (rtnl_rtscope_a2n(&scope, *argv)) { invarg(*argv, "invalid scope value."); } req.ifa.ifa_scope = scope; scoped = 1; break; } case 6: /* dev */ NEXT_ARG(); d = *argv; break; case 7: /* label */ NEXT_ARG(); l = *argv; addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1); break; case 8: /* local */ NEXT_ARG(); default: if (local_len) { duparg2("local", *argv); } get_prefix(&lcl, *argv, req.ifa.ifa_family); if (req.ifa.ifa_family == AF_UNSPEC) { req.ifa.ifa_family = lcl.family; } addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen); local_len = lcl.bytelen; } argc--; argv++; } if (d == NULL) { bb_error_msg("Not enough information: \"dev\" argument is required."); return -1; } if (l && matches(d, l) != 0) { bb_error_msg_and_die("\"dev\" (%s) must match \"label\" (%s).", d, l); } if (peer_len == 0 && local_len && cmd != RTM_DELADDR) { peer = lcl; addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen); } if (req.ifa.ifa_prefixlen == 0) req.ifa.ifa_prefixlen = lcl.bitlen; if (brd_len < 0 && cmd != RTM_DELADDR) { inet_prefix brd; int i; if (req.ifa.ifa_family != AF_INET) { bb_error_msg("Broadcast can be set only for IPv4 addresses"); return -1; } brd = peer; if (brd.bitlen <= 30) { for (i=31; i>=brd.bitlen; i--) { if (brd_len == -1) brd.data[0] |= htonl(1<<(31-i)); else brd.data[0] &= ~htonl(1<<(31-i)); } addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen); brd_len = brd.bytelen; } } if (!scoped && cmd != RTM_DELADDR) req.ifa.ifa_scope = default_scope(&lcl); if (rtnl_open(&rth, 0) < 0) exit(1); ll_init_map(&rth); if ((req.ifa.ifa_index = ll_name_to_index(d)) == 0) { bb_error_msg("Cannot find device \"%s\"", d); return -1; } if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) exit(2); exit(0); }
int ipaddr_modify(int cmd, int argc, char **argv) { struct rtnl_handle rth; struct { struct nlmsghdr n; struct ifaddrmsg ifa; char buf[256]; } req; char *d = NULL; char *l = NULL; char *valid_lftp = NULL; char *preferred_lftp = NULL; inet_prefix lcl; inet_prefix peer; int local_len = 0; int peer_len = 0; int brd_len = 0; int any_len = 0; int scoped = 0; __u32 preferred_lft = INFINITY_LIFE_TIME; __u32 valid_lft = INFINITY_LIFE_TIME; struct ifa_cacheinfo cinfo; memset(&req, 0, sizeof(req)); req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); req.n.nlmsg_flags = NLM_F_REQUEST; req.n.nlmsg_type = cmd; req.ifa.ifa_family = preferred_family; while (argc > 0) { if (strcmp(*argv, "peer") == 0 || strcmp(*argv, "remote") == 0) { NEXT_ARG(); if (peer_len) duparg("peer", *argv); get_prefix(&peer, *argv, req.ifa.ifa_family); peer_len = peer.bytelen; if (req.ifa.ifa_family == AF_UNSPEC) req.ifa.ifa_family = peer.family; addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen); req.ifa.ifa_prefixlen = peer.bitlen; } else if (matches(*argv, "broadcast") == 0 || strcmp(*argv, "brd") == 0) { inet_prefix addr; NEXT_ARG(); if (brd_len) duparg("broadcast", *argv); if (strcmp(*argv, "+") == 0) brd_len = -1; else if (strcmp(*argv, "-") == 0) brd_len = -2; else { get_addr(&addr, *argv, req.ifa.ifa_family); if (req.ifa.ifa_family == AF_UNSPEC) req.ifa.ifa_family = addr.family; addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen); brd_len = addr.bytelen; } } else if (strcmp(*argv, "anycast") == 0) { inet_prefix addr; NEXT_ARG(); if (any_len) duparg("anycast", *argv); get_addr(&addr, *argv, req.ifa.ifa_family); if (req.ifa.ifa_family == AF_UNSPEC) req.ifa.ifa_family = addr.family; addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen); any_len = addr.bytelen; } else if (strcmp(*argv, "scope") == 0) { int scope = 0; NEXT_ARG(); if (rtnl_rtscope_a2n(&scope, *argv)) invarg(*argv, "invalid scope value."); req.ifa.ifa_scope = scope; scoped = 1; } else if (strcmp(*argv, "dev") == 0) { NEXT_ARG(); d = *argv; } else if (strcmp(*argv, "label") == 0) { NEXT_ARG(); l = *argv; addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1); } else if (matches(*argv, "valid_lft") == 0) { if (valid_lftp) duparg("valid_lft", *argv); NEXT_ARG(); valid_lftp = *argv; if (set_lifetime(&valid_lft, *argv)) invarg("valid_lft value", *argv); } else if (matches(*argv, "preferred_lft") == 0) { if (preferred_lftp) duparg("preferred_lft", *argv); NEXT_ARG(); preferred_lftp = *argv; if (set_lifetime(&preferred_lft, *argv)) invarg("preferred_lft value", *argv); } else { if (strcmp(*argv, "local") == 0) { NEXT_ARG(); } if (matches(*argv, "help") == 0) usage(); if (local_len) duparg2("local", *argv); get_prefix(&lcl, *argv, req.ifa.ifa_family); if (req.ifa.ifa_family == AF_UNSPEC) req.ifa.ifa_family = lcl.family; addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen); local_len = lcl.bytelen; } argc--; argv++; } if (d == NULL) { fprintf(stderr, "Not enough information: \"dev\" argument is required.\n"); return -1; } if (l && matches(d, l) != 0) { fprintf(stderr, "\"dev\" (%s) must match \"label\" (%s).\n", d, l); exit(1); } if (peer_len == 0 && local_len && cmd != RTM_DELADDR) { peer = lcl; addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen); } if (req.ifa.ifa_prefixlen == 0) req.ifa.ifa_prefixlen = lcl.bitlen; if (brd_len < 0 && cmd != RTM_DELADDR) { inet_prefix brd; int i; if (req.ifa.ifa_family != AF_INET) { fprintf(stderr, "Broadcast can be set only for IPv4 addresses\n"); return -1; } brd = peer; if (brd.bitlen <= 30) { for (i=31; i>=brd.bitlen; i--) { if (brd_len == -1) brd.data[0] |= htonl(1<<(31-i)); else brd.data[0] &= ~htonl(1<<(31-i)); } addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen); brd_len = brd.bytelen; } } if (!scoped && cmd != RTM_DELADDR) req.ifa.ifa_scope = default_scope(&lcl); if (rtnl_open(&rth, 0) < 0) exit(1); ll_init_map(&rth); if ((req.ifa.ifa_index = ll_name_to_index(d)) == 0) { fprintf(stderr, "Cannot find device \"%s\"\n", d); return -1; } if (valid_lftp || preferred_lftp) { if (!valid_lft) { fprintf(stderr, "valid_lft is zero\n"); return -1; } if (valid_lft < preferred_lft) { fprintf(stderr, "preferred_lft is greater than valid_lft\n"); return -1; } memset(&cinfo, 0, sizeof(cinfo)); cinfo.ifa_prefered = preferred_lft; cinfo.ifa_valid = valid_lft; addattr_l(&req.n, sizeof(req), IFA_CACHEINFO, &cinfo, sizeof(cinfo)); } if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) exit(2); exit(0); }
/** * adds, updates or deletes addresses to interface * * @param addr * @param ifacename * @param prefixLen * @param preferred * @param valid * @param mode - 0-delete, 1-add, 2-update * * @return */ int ipaddr_add_or_del(const char * addr, const char *ifacename, int prefixLen, unsigned long preferred, unsigned long valid, int mode) { struct rtnl_handle rth; struct { struct nlmsghdr n; struct ifaddrmsg ifa; char buf[256]; } req; inet_prefix lcl; /* inet_prefix peer; */ int local_len = 0; int peer_len = 0; int scoped = 0; struct ifa_cacheinfo ci; #ifdef LOWLEVEL_DEBUG printf("### iface=%s, addr=%s, add=%d ###\n", ifacename, addr, add); #endif memset(&req, 0, sizeof(req)); req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); switch (mode) { case ADDROPER_DEL: req.n.nlmsg_type = RTM_DELADDR; /* del address */ req.n.nlmsg_flags = NLM_F_REQUEST; break; case ADDROPER_ADD: req.n.nlmsg_type = RTM_NEWADDR; /* add address */ req.n.nlmsg_flags = NLM_F_REQUEST |NLM_F_CREATE|NLM_F_EXCL; break; case ADDROPER_UPDATE: req.n.nlmsg_type = RTM_NEWADDR; /* update address */ req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_REPLACE; break; } req.ifa.ifa_family = AF_INET6; req.ifa.ifa_flags = 0; req.ifa.ifa_prefixlen = prefixLen; get_prefix_1(&lcl, (char*)addr, AF_INET6); addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen); local_len = lcl.bytelen; memset(&ci, 0, sizeof(ci)); ci.ifa_valid = valid; ci.ifa_prefered = preferred; addattr_l(&req.n, sizeof(req), IFA_CACHEINFO, &ci, sizeof(ci)); if (peer_len == 0 && local_len) { /* peer = lcl; */ addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen); } if (req.ifa.ifa_prefixlen == 0) req.ifa.ifa_prefixlen = lcl.bitlen; if (!scoped) req.ifa.ifa_scope = default_scope(&lcl); rtnl_open(&rth, 0); ll_init_map(&rth); /* is there an interface with this ifindex? */ if ((req.ifa.ifa_index = ll_name_to_index((char*)ifacename)) == 0) { sprintf(Message, "Cannot find device: %s", ifacename); rtnl_close(&rth); return LOWLEVEL_ERROR_UNSPEC; } rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL); fflush(stdout); rtnl_close(&rth); return LOWLEVEL_NO_ERROR; }
int ipaddr_modify(int cmd, int argc, char **argv) { struct rtnl_handle rth; struct { struct nlmsghdr n; struct ifaddrmsg ifa; char buf[256]; } req; char *d = NULL; char *l = NULL; char *lcl_arg = NULL; inet_prefix lcl; inet_prefix peer; int local_len = 0; int peer_len = 0; int brd_len = 0; int any_len = 0; int scoped = 0; memset(&req, 0, sizeof(req)); req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)); req.n.nlmsg_flags = NLM_F_REQUEST; req.n.nlmsg_type = cmd; req.ifa.ifa_family = preferred_family; while (argc > 0) { if (strcmp(*argv, "peer") == 0 || strcmp(*argv, "remote") == 0) { NEXT_ARG(); if (peer_len) duparg("peer", *argv); get_prefix(&peer, *argv, req.ifa.ifa_family); peer_len = peer.bytelen; if (req.ifa.ifa_family == AF_UNSPEC) req.ifa.ifa_family = peer.family; addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &peer.data, peer.bytelen); req.ifa.ifa_prefixlen = peer.bitlen; } else if (matches(*argv, "broadcast") == 0 || strcmp(*argv, "brd") == 0) { inet_prefix addr; NEXT_ARG(); if (brd_len) duparg("broadcast", *argv); if (strcmp(*argv, "+") == 0) brd_len = -1; else if (strcmp(*argv, "-") == 0) brd_len = -2; else { get_addr(&addr, *argv, req.ifa.ifa_family); if (req.ifa.ifa_family == AF_UNSPEC) req.ifa.ifa_family = addr.family; addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &addr.data, addr.bytelen); brd_len = addr.bytelen; } } else if (strcmp(*argv, "anycast") == 0) { inet_prefix addr; NEXT_ARG(); if (any_len) duparg("anycast", *argv); get_addr(&addr, *argv, req.ifa.ifa_family); if (req.ifa.ifa_family == AF_UNSPEC) req.ifa.ifa_family = addr.family; addattr_l(&req.n, sizeof(req), IFA_ANYCAST, &addr.data, addr.bytelen); any_len = addr.bytelen; } else if (strcmp(*argv, "scope") == 0) { int scope = 0; NEXT_ARG(); if (rtnl_rtscope_a2n(&scope, *argv)) invarg(*argv, "invalid scope value."); req.ifa.ifa_scope = scope; scoped = 1; } else if (strcmp(*argv, "dev") == 0) { NEXT_ARG(); d = *argv; } else if (strcmp(*argv, "label") == 0) { NEXT_ARG(); l = *argv; addattr_l(&req.n, sizeof(req), IFA_LABEL, l, strlen(l)+1); } else { if (strcmp(*argv, "local") == 0) { NEXT_ARG(); } if (matches(*argv, "help") == 0) usage(); if (local_len) duparg2("local", *argv); lcl_arg = *argv; get_prefix(&lcl, *argv, req.ifa.ifa_family); if (req.ifa.ifa_family == AF_UNSPEC) req.ifa.ifa_family = lcl.family; addattr_l(&req.n, sizeof(req), IFA_LOCAL, &lcl.data, lcl.bytelen); local_len = lcl.bytelen; } argc--; argv++; } if (d == NULL) { fprintf(stderr, "Not enough information: \"dev\" argument is required.\n"); return -1; } if (l && matches(d, l) != 0) { fprintf(stderr, "\"dev\" (%s) must match \"label\" (%s).\n", d, l); exit(1); } if (peer_len == 0 && local_len) { if (cmd == RTM_DELADDR && lcl.family == AF_INET && !(lcl.flags & PREFIXLEN_SPECIFIED)) { fprintf(stderr, "Warning: Executing wildcard deletion to stay compatible with old scripts.\n" \ " Explicitly specify the prefix length (%s/%d) to avoid this warning.\n" \ " This special behaviour is likely to disappear in further releases,\n" \ " fix your scripts!\n", lcl_arg, local_len*8); } else { peer = lcl; addattr_l(&req.n, sizeof(req), IFA_ADDRESS, &lcl.data, lcl.bytelen); } } if (req.ifa.ifa_prefixlen == 0) req.ifa.ifa_prefixlen = lcl.bitlen; if (brd_len < 0 && cmd != RTM_DELADDR) { inet_prefix brd; int i; if (req.ifa.ifa_family != AF_INET) { fprintf(stderr, "Broadcast can be set only for IPv4 addresses\n"); return -1; } brd = peer; if (brd.bitlen <= 30) { for (i=31; i>=brd.bitlen; i--) { if (brd_len == -1) brd.data[0] |= htonl(1<<(31-i)); else brd.data[0] &= ~htonl(1<<(31-i)); } addattr_l(&req.n, sizeof(req), IFA_BROADCAST, &brd.data, brd.bytelen); brd_len = brd.bytelen; } } if (!scoped && cmd != RTM_DELADDR) req.ifa.ifa_scope = default_scope(&lcl); if (rtnl_open(&rth, 0) < 0) exit(1); ll_init_map(&rth); if ((req.ifa.ifa_index = ll_name_to_index(d)) == 0) { fprintf(stderr, "Cannot find device \"%s\"\n", d); return -1; } if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) exit(2); exit(0); }