Daniel Borkmann | 191b60b | 2013-04-30 06:22:50 +0000 | [diff] [blame] | 1 | /* |
| 2 | * iptoken.c "ip token" |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * Authors: Daniel Borkmann, <borkmann@redhat.com> |
| 10 | */ |
| 11 | |
| 12 | #include <stdio.h> |
| 13 | #include <stdlib.h> |
| 14 | #include <stdbool.h> |
| 15 | #include <unistd.h> |
| 16 | #include <syslog.h> |
| 17 | #include <fcntl.h> |
| 18 | #include <string.h> |
| 19 | #include <sys/socket.h> |
| 20 | #include <netinet/in.h> |
| 21 | #include <netinet/ip.h> |
| 22 | #include <arpa/inet.h> |
| 23 | #include <linux/types.h> |
| 24 | #include <linux/if.h> |
| 25 | |
| 26 | #include "rt_names.h" |
| 27 | #include "utils.h" |
| 28 | #include "ip_common.h" |
| 29 | |
| 30 | extern struct rtnl_handle rth; |
| 31 | |
| 32 | struct rtnl_dump_args { |
| 33 | FILE *fp; |
| 34 | int ifindex; |
| 35 | }; |
| 36 | |
| 37 | static void usage(void) __attribute__((noreturn)); |
| 38 | |
| 39 | static void usage(void) |
| 40 | { |
| 41 | fprintf(stderr, "Usage: ip token [ list | set | get ] [ TOKEN ] [ dev DEV ]\n"); |
| 42 | exit(-1); |
| 43 | } |
| 44 | |
| 45 | static int print_token(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) |
| 46 | { |
| 47 | struct rtnl_dump_args *args = arg; |
| 48 | FILE *fp = args->fp; |
| 49 | int ifindex = args->ifindex; |
| 50 | struct ifinfomsg *ifi = NLMSG_DATA(n); |
| 51 | int len = n->nlmsg_len; |
| 52 | struct rtattr *tb[IFLA_MAX + 1]; |
| 53 | struct rtattr *ltb[IFLA_INET6_MAX + 1]; |
| 54 | char abuf[256]; |
| 55 | |
| 56 | if (n->nlmsg_type != RTM_NEWLINK) |
| 57 | return -1; |
| 58 | |
| 59 | len -= NLMSG_LENGTH(sizeof(*ifi)); |
| 60 | if (len < 0) |
| 61 | return -1; |
| 62 | |
| 63 | if (ifi->ifi_family != AF_INET6) |
| 64 | return -1; |
| 65 | if (ifi->ifi_index == 0) |
| 66 | return -1; |
| 67 | if (ifindex > 0 && ifi->ifi_index != ifindex) |
| 68 | return 0; |
| 69 | if (ifi->ifi_flags & (IFF_LOOPBACK | IFF_NOARP)) |
| 70 | return 0; |
| 71 | |
| 72 | parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len); |
| 73 | if (!tb[IFLA_PROTINFO]) |
| 74 | return -1; |
| 75 | |
| 76 | parse_rtattr_nested(ltb, IFLA_INET6_MAX, tb[IFLA_PROTINFO]); |
| 77 | if (!ltb[IFLA_INET6_TOKEN]) { |
| 78 | fprintf(stderr, "Seems there's no support for IPv6 token!\n"); |
| 79 | return -1; |
| 80 | } |
| 81 | |
| 82 | fprintf(fp, "token %s ", |
| 83 | format_host(ifi->ifi_family, |
| 84 | RTA_PAYLOAD(ltb[IFLA_INET6_TOKEN]), |
| 85 | RTA_DATA(ltb[IFLA_INET6_TOKEN]), |
| 86 | abuf, sizeof(abuf))); |
| 87 | fprintf(fp, "dev %s ", ll_index_to_name(ifi->ifi_index)); |
| 88 | fprintf(fp, "\n"); |
| 89 | fflush(fp); |
| 90 | |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | static int iptoken_list(int argc, char **argv) |
| 95 | { |
| 96 | int af = AF_INET6; |
| 97 | struct rtnl_dump_args da; |
| 98 | const struct rtnl_dump_filter_arg a[2] = { |
| 99 | { .filter = print_token, .arg1 = &da, }, |
| 100 | { .filter = NULL, .arg1 = NULL, }, |
| 101 | }; |
| 102 | |
| 103 | memset(&da, 0, sizeof(da)); |
| 104 | da.fp = stdout; |
| 105 | |
| 106 | while (argc > 0) { |
| 107 | if (strcmp(*argv, "dev") == 0) { |
| 108 | NEXT_ARG(); |
| 109 | if ((da.ifindex = ll_name_to_index(*argv)) == 0) |
| 110 | invarg("dev is invalid\n", *argv); |
| 111 | break; |
| 112 | } |
| 113 | argc--; argv++; |
| 114 | } |
| 115 | |
| 116 | if (rtnl_wilddump_request(&rth, af, RTM_GETLINK) < 0) { |
| 117 | perror("Cannot send dump request"); |
| 118 | return -1; |
| 119 | } |
| 120 | |
| 121 | if (rtnl_dump_filter_l(&rth, a) < 0) { |
| 122 | fprintf(stderr, "Dump terminated\n"); |
| 123 | return -1; |
| 124 | } |
| 125 | |
| 126 | return 0; |
| 127 | } |
| 128 | |
| 129 | static int iptoken_set(int argc, char **argv) |
| 130 | { |
| 131 | struct { |
| 132 | struct nlmsghdr n; |
| 133 | struct ifinfomsg ifi; |
| 134 | char buf[512]; |
| 135 | } req; |
| 136 | struct rtattr *afs, *afs6; |
| 137 | bool have_token = false, have_dev = false; |
| 138 | inet_prefix addr; |
| 139 | |
| 140 | memset(&addr, 0, sizeof(addr)); |
| 141 | memset(&req, 0, sizeof(req)); |
| 142 | |
| 143 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); |
| 144 | req.n.nlmsg_flags = NLM_F_REQUEST; |
| 145 | req.n.nlmsg_type = RTM_SETLINK; |
| 146 | req.ifi.ifi_family = AF_INET6; |
| 147 | |
| 148 | while (argc > 0) { |
| 149 | if (strcmp(*argv, "dev") == 0) { |
| 150 | NEXT_ARG(); |
| 151 | if (!have_dev) { |
| 152 | if ((req.ifi.ifi_index = |
| 153 | ll_name_to_index(*argv)) == 0) |
| 154 | invarg("dev is invalid\n", *argv); |
| 155 | have_dev = true; |
| 156 | } |
| 157 | } else { |
| 158 | if (matches(*argv, "help") == 0) |
| 159 | usage(); |
| 160 | if (!have_token) { |
| 161 | afs = addattr_nest(&req.n, sizeof(req), IFLA_AF_SPEC); |
| 162 | afs6 = addattr_nest(&req.n, sizeof(req), AF_INET6); |
| 163 | get_prefix(&addr, *argv, req.ifi.ifi_family); |
| 164 | addattr_l(&req.n, sizeof(req), IFLA_INET6_TOKEN, |
| 165 | &addr.data, addr.bytelen); |
| 166 | addattr_nest_end(&req.n, afs6); |
| 167 | addattr_nest_end(&req.n, afs); |
| 168 | have_token = true; |
| 169 | } |
| 170 | } |
| 171 | argc--; argv++; |
| 172 | } |
| 173 | |
| 174 | if (!have_token) { |
| 175 | fprintf(stderr, "Not enough information: token " |
| 176 | "is required.\n"); |
| 177 | return -1; |
| 178 | } |
| 179 | if (!have_dev) { |
| 180 | fprintf(stderr, "Not enough information: \"dev\" " |
| 181 | "argument is required.\n"); |
| 182 | return -1; |
| 183 | } |
| 184 | |
| 185 | if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0) |
| 186 | return -2; |
| 187 | |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | int do_iptoken(int argc, char **argv) |
| 192 | { |
| 193 | ll_init_map(&rth); |
| 194 | |
| 195 | if (argc < 1) { |
| 196 | return iptoken_list(0, NULL); |
| 197 | } else if (matches(argv[0], "list") == 0 || |
Mark Einon | 473544d | 2015-03-16 09:59:09 +0000 | [diff] [blame] | 198 | matches(argv[0], "lst") == 0 || |
Daniel Borkmann | 191b60b | 2013-04-30 06:22:50 +0000 | [diff] [blame] | 199 | matches(argv[0], "show") == 0) { |
| 200 | return iptoken_list(argc - 1, argv + 1); |
| 201 | } else if (matches(argv[0], "set") == 0 || |
| 202 | matches(argv[0], "add") == 0) { |
| 203 | return iptoken_set(argc - 1, argv + 1); |
| 204 | } else if (matches(argv[0], "get") == 0) { |
| 205 | return iptoken_list(argc - 1, argv + 1); |
| 206 | } else if (matches(argv[0], "help") == 0) |
| 207 | usage(); |
| 208 | |
| 209 | fprintf(stderr, "Command \"%s\" is unknown, try \"ip token help\".\n", *argv); |
| 210 | exit(-1); |
| 211 | } |