osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 1 | /* |
| 2 | * iprule.c "ip rule". |
| 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: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| 10 | * |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 11 | */ |
| 12 | |
| 13 | #include <stdio.h> |
| 14 | #include <stdlib.h> |
| 15 | #include <unistd.h> |
| 16 | #include <syslog.h> |
| 17 | #include <fcntl.h> |
| 18 | #include <sys/socket.h> |
| 19 | #include <netinet/in.h> |
| 20 | #include <netinet/ip.h> |
| 21 | #include <arpa/inet.h> |
| 22 | #include <string.h> |
Thomas Graf | 3123a0c | 2006-11-09 12:38:02 +0100 | [diff] [blame] | 23 | #include <linux/fib_rules.h> |
Kirill Tkhai | 2f4e171 | 2015-10-20 13:41:48 +0300 | [diff] [blame] | 24 | #include <errno.h> |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 25 | |
| 26 | #include "rt_names.h" |
| 27 | #include "utils.h" |
Patrick McHardy | 34e9564 | 2006-08-11 00:14:51 +0200 | [diff] [blame] | 28 | #include "ip_common.h" |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 29 | |
shemminger | 351efcd | 2005-09-01 19:21:50 +0000 | [diff] [blame] | 30 | extern struct rtnl_handle rth; |
| 31 | |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 32 | static void usage(void) __attribute__((noreturn)); |
| 33 | |
| 34 | static void usage(void) |
| 35 | { |
Kirill Tkhai | 2f4e171 | 2015-10-20 13:41:48 +0300 | [diff] [blame] | 36 | fprintf(stderr, "Usage: ip rule [ list | add | del | flush | save ] SELECTOR ACTION\n"); |
| 37 | fprintf(stderr, " ip rule restore\n"); |
Patrick McHardy | be7f286 | 2006-12-13 16:58:32 -0800 | [diff] [blame] | 38 | fprintf(stderr, "SELECTOR := [ not ] [ from PREFIX ] [ to PREFIX ] [ tos TOS ] [ fwmark FWMARK[/MASK] ]\n"); |
Patrick McHardy | 85eae22 | 2009-12-03 20:07:14 +0000 | [diff] [blame] | 39 | fprintf(stderr, " [ iif STRING ] [ oif STRING ] [ pref NUMBER ]\n"); |
net[shemminger]!shemminger | 526afe4 | 2005-01-17 23:27:23 +0000 | [diff] [blame] | 40 | fprintf(stderr, "ACTION := [ table TABLE_ID ]\n"); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 41 | fprintf(stderr, " [ realms [SRCREALM/]DSTREALM ]\n"); |
Thomas Graf | 6b469ca | 2007-03-27 02:04:10 +0200 | [diff] [blame] | 42 | fprintf(stderr, " [ goto NUMBER ]\n"); |
Stefan Tomanek | b1d0525 | 2013-08-03 14:23:16 +0200 | [diff] [blame] | 43 | fprintf(stderr, " SUPPRESSOR\n"); |
| 44 | fprintf(stderr, "SUPPRESSOR := [ suppress_prefixlength NUMBER ]\n"); |
| 45 | fprintf(stderr, " [ suppress_ifgroup DEVGROUP ]\n"); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 46 | fprintf(stderr, "TABLE_ID := [ local | main | default | NUMBER ]\n"); |
| 47 | exit(-1); |
| 48 | } |
| 49 | |
Thomas Graf | 98bde98 | 2006-11-10 12:27:10 +0100 | [diff] [blame] | 50 | int print_rule(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 51 | { |
| 52 | FILE *fp = (FILE*)arg; |
| 53 | struct rtmsg *r = NLMSG_DATA(n); |
| 54 | int len = n->nlmsg_len; |
| 55 | int host_len = -1; |
Patrick McHardy | 34e9564 | 2006-08-11 00:14:51 +0200 | [diff] [blame] | 56 | __u32 table; |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 57 | struct rtattr * tb[FRA_MAX+1]; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 58 | char abuf[256]; |
| 59 | SPRINT_BUF(b1); |
| 60 | |
Thomas Graf | 98bde98 | 2006-11-10 12:27:10 +0100 | [diff] [blame] | 61 | if (n->nlmsg_type != RTM_NEWRULE && n->nlmsg_type != RTM_DELRULE) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 62 | return 0; |
| 63 | |
| 64 | len -= NLMSG_LENGTH(sizeof(*r)); |
| 65 | if (len < 0) |
| 66 | return -1; |
| 67 | |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 68 | parse_rtattr(tb, FRA_MAX, RTM_RTA(r), len); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 69 | |
Vadim Kochan | f3a2ddc | 2015-02-28 02:50:24 +0200 | [diff] [blame] | 70 | host_len = af_bit_len(r->rtm_family); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 71 | |
Thomas Graf | 98bde98 | 2006-11-10 12:27:10 +0100 | [diff] [blame] | 72 | if (n->nlmsg_type == RTM_DELRULE) |
| 73 | fprintf(fp, "Deleted "); |
| 74 | |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 75 | if (tb[FRA_PRIORITY]) |
| 76 | fprintf(fp, "%u:\t", *(unsigned*)RTA_DATA(tb[FRA_PRIORITY])); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 77 | else |
| 78 | fprintf(fp, "0:\t"); |
| 79 | |
Thomas Graf | 3123a0c | 2006-11-09 12:38:02 +0100 | [diff] [blame] | 80 | if (r->rtm_flags & FIB_RULE_INVERT) |
| 81 | fprintf(fp, "not "); |
| 82 | |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 83 | if (tb[FRA_SRC]) { |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 84 | if (r->rtm_src_len != host_len) { |
| 85 | fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family, |
Eric W. Biederman | 26dcdf3 | 2015-03-15 14:48:32 -0500 | [diff] [blame] | 86 | RTA_PAYLOAD(tb[FRA_SRC]), |
| 87 | RTA_DATA(tb[FRA_SRC]), |
| 88 | abuf, sizeof(abuf)), |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 89 | r->rtm_src_len |
| 90 | ); |
| 91 | } else { |
| 92 | fprintf(fp, "from %s ", format_host(r->rtm_family, |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 93 | RTA_PAYLOAD(tb[FRA_SRC]), |
| 94 | RTA_DATA(tb[FRA_SRC]), |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 95 | abuf, sizeof(abuf)) |
| 96 | ); |
| 97 | } |
| 98 | } else if (r->rtm_src_len) { |
| 99 | fprintf(fp, "from 0/%d ", r->rtm_src_len); |
| 100 | } else { |
| 101 | fprintf(fp, "from all "); |
| 102 | } |
| 103 | |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 104 | if (tb[FRA_DST]) { |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 105 | if (r->rtm_dst_len != host_len) { |
| 106 | fprintf(fp, "to %s/%u ", rt_addr_n2a(r->rtm_family, |
Eric W. Biederman | 26dcdf3 | 2015-03-15 14:48:32 -0500 | [diff] [blame] | 107 | RTA_PAYLOAD(tb[FRA_DST]), |
| 108 | RTA_DATA(tb[FRA_DST]), |
| 109 | abuf, sizeof(abuf)), |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 110 | r->rtm_dst_len |
| 111 | ); |
| 112 | } else { |
| 113 | fprintf(fp, "to %s ", format_host(r->rtm_family, |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 114 | RTA_PAYLOAD(tb[FRA_DST]), |
| 115 | RTA_DATA(tb[FRA_DST]), |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 116 | abuf, sizeof(abuf))); |
| 117 | } |
| 118 | } else if (r->rtm_dst_len) { |
| 119 | fprintf(fp, "to 0/%d ", r->rtm_dst_len); |
| 120 | } |
| 121 | |
| 122 | if (r->rtm_tos) { |
| 123 | SPRINT_BUF(b1); |
| 124 | fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1))); |
| 125 | } |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 126 | |
Stephen Hemminger | 4806867 | 2014-02-17 10:56:31 -0800 | [diff] [blame] | 127 | if (tb[FRA_FWMARK] || tb[FRA_FWMASK]) { |
Patrick McHardy | be7f286 | 2006-12-13 16:58:32 -0800 | [diff] [blame] | 128 | __u32 mark = 0, mask = 0; |
| 129 | |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 130 | if (tb[FRA_FWMARK]) |
Stephen Hemminger | ff24746 | 2012-04-10 08:47:55 -0700 | [diff] [blame] | 131 | mark = rta_getattr_u32(tb[FRA_FWMARK]); |
Patrick McHardy | be7f286 | 2006-12-13 16:58:32 -0800 | [diff] [blame] | 132 | |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 133 | if (tb[FRA_FWMASK] && |
Stephen Hemminger | ff24746 | 2012-04-10 08:47:55 -0700 | [diff] [blame] | 134 | (mask = rta_getattr_u32(tb[FRA_FWMASK])) != 0xFFFFFFFF) |
Patrick McHardy | be7f286 | 2006-12-13 16:58:32 -0800 | [diff] [blame] | 135 | fprintf(fp, "fwmark 0x%x/0x%x ", mark, mask); |
Stephen Hemminger | 81c6179 | 2006-12-13 17:05:50 -0800 | [diff] [blame] | 136 | else |
Patrick McHardy | be7f286 | 2006-12-13 16:58:32 -0800 | [diff] [blame] | 137 | fprintf(fp, "fwmark 0x%x ", mark); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 138 | } |
| 139 | |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 140 | if (tb[FRA_IFNAME]) { |
Stephen Hemminger | ff24746 | 2012-04-10 08:47:55 -0700 | [diff] [blame] | 141 | fprintf(fp, "iif %s ", rta_getattr_str(tb[FRA_IFNAME])); |
Patrick McHardy | 85eae22 | 2009-12-03 20:07:14 +0000 | [diff] [blame] | 142 | if (r->rtm_flags & FIB_RULE_IIF_DETACHED) |
| 143 | fprintf(fp, "[detached] "); |
| 144 | } |
| 145 | |
| 146 | if (tb[FRA_OIFNAME]) { |
Stephen Hemminger | ff24746 | 2012-04-10 08:47:55 -0700 | [diff] [blame] | 147 | fprintf(fp, "oif %s ", rta_getattr_str(tb[FRA_OIFNAME])); |
Patrick McHardy | 85eae22 | 2009-12-03 20:07:14 +0000 | [diff] [blame] | 148 | if (r->rtm_flags & FIB_RULE_OIF_DETACHED) |
Thomas Graf | 6b469ca | 2007-03-27 02:04:10 +0200 | [diff] [blame] | 149 | fprintf(fp, "[detached] "); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 150 | } |
| 151 | |
Patrick McHardy | 34e9564 | 2006-08-11 00:14:51 +0200 | [diff] [blame] | 152 | table = rtm_get_table(r, tb); |
Stefan Tomanek | b1d0525 | 2013-08-03 14:23:16 +0200 | [diff] [blame] | 153 | if (table) { |
Patrick McHardy | 34e9564 | 2006-08-11 00:14:51 +0200 | [diff] [blame] | 154 | fprintf(fp, "lookup %s ", rtnl_rttable_n2a(table, b1, sizeof(b1))); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 155 | |
Stefan Tomanek | b1d0525 | 2013-08-03 14:23:16 +0200 | [diff] [blame] | 156 | if (tb[FRA_SUPPRESS_PREFIXLEN]) { |
| 157 | int pl = rta_getattr_u32(tb[FRA_SUPPRESS_PREFIXLEN]); |
| 158 | if (pl != -1) { |
| 159 | fprintf(fp, "suppress_prefixlength %d ", pl); |
| 160 | } |
| 161 | } |
| 162 | if (tb[FRA_SUPPRESS_IFGROUP]) { |
| 163 | int group = rta_getattr_u32(tb[FRA_SUPPRESS_IFGROUP]); |
| 164 | if (group != -1) { |
| 165 | SPRINT_BUF(b1); |
| 166 | fprintf(fp, "suppress_ifgroup %s ", rtnl_group_n2a(group, b1, sizeof(b1))); |
| 167 | } |
| 168 | } |
| 169 | } |
| 170 | |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 171 | if (tb[FRA_FLOW]) { |
Stephen Hemminger | ff24746 | 2012-04-10 08:47:55 -0700 | [diff] [blame] | 172 | __u32 to = rta_getattr_u32(tb[FRA_FLOW]); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 173 | __u32 from = to>>16; |
| 174 | to &= 0xFFFF; |
| 175 | if (from) { |
| 176 | fprintf(fp, "realms %s/", |
| 177 | rtnl_rtrealm_n2a(from, b1, sizeof(b1))); |
| 178 | } |
| 179 | fprintf(fp, "%s ", |
| 180 | rtnl_rtrealm_n2a(to, b1, sizeof(b1))); |
| 181 | } |
| 182 | |
| 183 | if (r->rtm_type == RTN_NAT) { |
| 184 | if (tb[RTA_GATEWAY]) { |
Stephen Hemminger | ae665a5 | 2006-12-05 10:10:22 -0800 | [diff] [blame] | 185 | fprintf(fp, "map-to %s ", |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 186 | format_host(r->rtm_family, |
| 187 | RTA_PAYLOAD(tb[RTA_GATEWAY]), |
| 188 | RTA_DATA(tb[RTA_GATEWAY]), |
| 189 | abuf, sizeof(abuf))); |
| 190 | } else |
| 191 | fprintf(fp, "masquerade"); |
Thomas Graf | 6b469ca | 2007-03-27 02:04:10 +0200 | [diff] [blame] | 192 | } else if (r->rtm_type == FR_ACT_GOTO) { |
| 193 | fprintf(fp, "goto "); |
| 194 | if (tb[FRA_GOTO]) |
Stephen Hemminger | ff24746 | 2012-04-10 08:47:55 -0700 | [diff] [blame] | 195 | fprintf(fp, "%u", rta_getattr_u32(tb[FRA_GOTO])); |
Thomas Graf | 6b469ca | 2007-03-27 02:04:10 +0200 | [diff] [blame] | 196 | else |
| 197 | fprintf(fp, "none"); |
| 198 | if (r->rtm_flags & FIB_RULE_UNRESOLVED) |
| 199 | fprintf(fp, " [unresolved]"); |
| 200 | } else if (r->rtm_type == FR_ACT_NOP) |
| 201 | fprintf(fp, "nop"); |
| 202 | else if (r->rtm_type != RTN_UNICAST) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 203 | fprintf(fp, "%s", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1))); |
| 204 | |
| 205 | fprintf(fp, "\n"); |
| 206 | fflush(fp); |
| 207 | return 0; |
| 208 | } |
| 209 | |
Kirill Tkhai | 2f4e171 | 2015-10-20 13:41:48 +0300 | [diff] [blame] | 210 | static __u32 rule_dump_magic = 0x71706986; |
| 211 | |
| 212 | static int save_rule_prep(void) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 213 | { |
Kirill Tkhai | 2f4e171 | 2015-10-20 13:41:48 +0300 | [diff] [blame] | 214 | int ret; |
| 215 | |
| 216 | if (isatty(STDOUT_FILENO)) { |
| 217 | fprintf(stderr, "Not sending a binary stream to stdout\n"); |
| 218 | return -1; |
| 219 | } |
| 220 | |
| 221 | ret = write(STDOUT_FILENO, &rule_dump_magic, sizeof(rule_dump_magic)); |
| 222 | if (ret != sizeof(rule_dump_magic)) { |
| 223 | fprintf(stderr, "Can't write magic to dump file\n"); |
| 224 | return -1; |
| 225 | } |
| 226 | |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | static int save_rule(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) |
| 231 | { |
| 232 | int ret; |
| 233 | |
| 234 | ret = write(STDOUT_FILENO, n, n->nlmsg_len); |
| 235 | if ((ret > 0) && (ret != n->nlmsg_len)) { |
| 236 | fprintf(stderr, "Short write while saving nlmsg\n"); |
| 237 | ret = -EIO; |
| 238 | } |
| 239 | |
| 240 | return ret == n->nlmsg_len ? 0 : ret; |
| 241 | } |
| 242 | |
| 243 | static int iprule_list_or_save(int argc, char **argv, int save) |
| 244 | { |
| 245 | rtnl_filter_t filter = print_rule; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 246 | int af = preferred_family; |
| 247 | |
| 248 | if (af == AF_UNSPEC) |
| 249 | af = AF_INET; |
| 250 | |
| 251 | if (argc > 0) { |
Kirill Tkhai | 2f4e171 | 2015-10-20 13:41:48 +0300 | [diff] [blame] | 252 | fprintf(stderr, "\"ip rule %s\" does not take any arguments.\n", |
| 253 | save ? "save" : "show"); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 254 | return -1; |
| 255 | } |
| 256 | |
Kirill Tkhai | 2f4e171 | 2015-10-20 13:41:48 +0300 | [diff] [blame] | 257 | if (save) { |
| 258 | if (save_rule_prep()) |
| 259 | return -1; |
| 260 | filter = save_rule; |
| 261 | } |
| 262 | |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 263 | if (rtnl_wilddump_request(&rth, af, RTM_GETRULE) < 0) { |
| 264 | perror("Cannot send dump request"); |
| 265 | return 1; |
| 266 | } |
| 267 | |
Kirill Tkhai | 2f4e171 | 2015-10-20 13:41:48 +0300 | [diff] [blame] | 268 | if (rtnl_dump_filter(&rth, filter, stdout) < 0) { |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 269 | fprintf(stderr, "Dump terminated\n"); |
| 270 | return 1; |
| 271 | } |
| 272 | |
| 273 | return 0; |
| 274 | } |
| 275 | |
Kirill Tkhai | 2f4e171 | 2015-10-20 13:41:48 +0300 | [diff] [blame] | 276 | static int rule_dump_check_magic(void) |
| 277 | { |
| 278 | int ret; |
| 279 | __u32 magic = 0; |
| 280 | |
| 281 | if (isatty(STDIN_FILENO)) { |
| 282 | fprintf(stderr, "Can't restore rule dump from a terminal\n"); |
| 283 | return -1; |
| 284 | } |
| 285 | |
| 286 | ret = fread(&magic, sizeof(magic), 1, stdin); |
| 287 | if (magic != rule_dump_magic) { |
| 288 | fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic); |
| 289 | return -1; |
| 290 | } |
| 291 | |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | static int restore_handler(const struct sockaddr_nl *nl, |
| 296 | struct rtnl_ctrl_data *ctrl, |
| 297 | struct nlmsghdr *n, void *arg) |
| 298 | { |
| 299 | int ret; |
| 300 | |
| 301 | n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK; |
| 302 | |
| 303 | ll_init_map(&rth); |
| 304 | |
| 305 | ret = rtnl_talk(&rth, n, n, sizeof(*n)); |
| 306 | if ((ret < 0) && (errno == EEXIST)) |
| 307 | ret = 0; |
| 308 | |
| 309 | return ret; |
| 310 | } |
| 311 | |
| 312 | |
| 313 | static int iprule_restore(void) |
| 314 | { |
| 315 | if (rule_dump_check_magic()) |
| 316 | exit(-1); |
| 317 | |
| 318 | exit(rtnl_from_file(stdin, &restore_handler, NULL)); |
| 319 | } |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 320 | |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 321 | static int iprule_modify(int cmd, int argc, char **argv) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 322 | { |
| 323 | int table_ok = 0; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 324 | struct { |
Stephen Hemminger | 4806867 | 2014-02-17 10:56:31 -0800 | [diff] [blame] | 325 | struct nlmsghdr n; |
| 326 | struct rtmsg r; |
| 327 | char buf[1024]; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 328 | } req; |
| 329 | |
| 330 | memset(&req, 0, sizeof(req)); |
| 331 | |
| 332 | req.n.nlmsg_type = cmd; |
| 333 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
| 334 | req.n.nlmsg_flags = NLM_F_REQUEST; |
| 335 | req.r.rtm_family = preferred_family; |
| 336 | req.r.rtm_protocol = RTPROT_BOOT; |
| 337 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
| 338 | req.r.rtm_table = 0; |
| 339 | req.r.rtm_type = RTN_UNSPEC; |
Thomas Graf | 3123a0c | 2006-11-09 12:38:02 +0100 | [diff] [blame] | 340 | req.r.rtm_flags = 0; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 341 | |
| 342 | if (cmd == RTM_NEWRULE) { |
| 343 | req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL; |
| 344 | req.r.rtm_type = RTN_UNICAST; |
| 345 | } |
| 346 | |
| 347 | while (argc > 0) { |
Thomas Graf | 3123a0c | 2006-11-09 12:38:02 +0100 | [diff] [blame] | 348 | if (strcmp(*argv, "not") == 0) { |
| 349 | req.r.rtm_flags |= FIB_RULE_INVERT; |
| 350 | } else if (strcmp(*argv, "from") == 0) { |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 351 | inet_prefix dst; |
| 352 | NEXT_ARG(); |
| 353 | get_prefix(&dst, *argv, req.r.rtm_family); |
| 354 | req.r.rtm_src_len = dst.bitlen; |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 355 | addattr_l(&req.n, sizeof(req), FRA_SRC, &dst.data, dst.bytelen); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 356 | } else if (strcmp(*argv, "to") == 0) { |
| 357 | inet_prefix dst; |
| 358 | NEXT_ARG(); |
| 359 | get_prefix(&dst, *argv, req.r.rtm_family); |
| 360 | req.r.rtm_dst_len = dst.bitlen; |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 361 | addattr_l(&req.n, sizeof(req), FRA_DST, &dst.data, dst.bytelen); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 362 | } else if (matches(*argv, "preference") == 0 || |
| 363 | matches(*argv, "order") == 0 || |
| 364 | matches(*argv, "priority") == 0) { |
| 365 | __u32 pref; |
| 366 | NEXT_ARG(); |
| 367 | if (get_u32(&pref, *argv, 0)) |
| 368 | invarg("preference value is invalid\n", *argv); |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 369 | addattr32(&req.n, sizeof(req), FRA_PRIORITY, pref); |
Arnd Hannemann | dec0160 | 2010-05-21 04:10:09 +0000 | [diff] [blame] | 370 | } else if (strcmp(*argv, "tos") == 0 || |
| 371 | matches(*argv, "dsfield") == 0) { |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 372 | __u32 tos; |
| 373 | NEXT_ARG(); |
| 374 | if (rtnl_dsfield_a2n(&tos, *argv)) |
| 375 | invarg("TOS value is invalid\n", *argv); |
| 376 | req.r.rtm_tos = tos; |
| 377 | } else if (strcmp(*argv, "fwmark") == 0) { |
Patrick McHardy | be7f286 | 2006-12-13 16:58:32 -0800 | [diff] [blame] | 378 | char *slash; |
| 379 | __u32 fwmark, fwmask; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 380 | NEXT_ARG(); |
Patrick McHardy | be7f286 | 2006-12-13 16:58:32 -0800 | [diff] [blame] | 381 | if ((slash = strchr(*argv, '/')) != NULL) |
| 382 | *slash = '\0'; |
org[shemminger]!shemminger | 4fb466f | 2004-06-07 22:02:48 +0000 | [diff] [blame] | 383 | if (get_u32(&fwmark, *argv, 0)) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 384 | invarg("fwmark value is invalid\n", *argv); |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 385 | addattr32(&req.n, sizeof(req), FRA_FWMARK, fwmark); |
Patrick McHardy | be7f286 | 2006-12-13 16:58:32 -0800 | [diff] [blame] | 386 | if (slash) { |
| 387 | if (get_u32(&fwmask, slash+1, 0)) |
| 388 | invarg("fwmask value is invalid\n", slash+1); |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 389 | addattr32(&req.n, sizeof(req), FRA_FWMASK, fwmask); |
Patrick McHardy | be7f286 | 2006-12-13 16:58:32 -0800 | [diff] [blame] | 390 | } |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 391 | } else if (matches(*argv, "realms") == 0) { |
| 392 | __u32 realm; |
| 393 | NEXT_ARG(); |
Daniel Borkmann | d583e88 | 2015-10-08 12:22:39 +0200 | [diff] [blame] | 394 | if (get_rt_realms_or_raw(&realm, *argv)) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 395 | invarg("invalid realms\n", *argv); |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 396 | addattr32(&req.n, sizeof(req), FRA_FLOW, realm); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 397 | } else if (matches(*argv, "table") == 0 || |
| 398 | strcmp(*argv, "lookup") == 0) { |
shemminger | f332d16 | 2005-07-05 22:37:15 +0000 | [diff] [blame] | 399 | __u32 tid; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 400 | NEXT_ARG(); |
| 401 | if (rtnl_rttable_a2n(&tid, *argv)) |
| 402 | invarg("invalid table ID\n", *argv); |
Patrick McHardy | 34e9564 | 2006-08-11 00:14:51 +0200 | [diff] [blame] | 403 | if (tid < 256) |
| 404 | req.r.rtm_table = tid; |
| 405 | else { |
| 406 | req.r.rtm_table = RT_TABLE_UNSPEC; |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 407 | addattr32(&req.n, sizeof(req), FRA_TABLE, tid); |
Patrick McHardy | 34e9564 | 2006-08-11 00:14:51 +0200 | [diff] [blame] | 408 | } |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 409 | table_ok = 1; |
Stefan Tomanek | b1d0525 | 2013-08-03 14:23:16 +0200 | [diff] [blame] | 410 | } else if (matches(*argv, "suppress_prefixlength") == 0 || |
| 411 | strcmp(*argv, "sup_pl") == 0) { |
| 412 | int pl; |
| 413 | NEXT_ARG(); |
| 414 | if (get_s32(&pl, *argv, 0) || pl < 0) |
| 415 | invarg("suppress_prefixlength value is invalid\n", *argv); |
| 416 | addattr32(&req.n, sizeof(req), FRA_SUPPRESS_PREFIXLEN, pl); |
| 417 | } else if (matches(*argv, "suppress_ifgroup") == 0 || |
| 418 | strcmp(*argv, "sup_group") == 0) { |
| 419 | NEXT_ARG(); |
| 420 | int group; |
| 421 | if (rtnl_group_a2n(&group, *argv)) |
| 422 | invarg("Invalid \"suppress_ifgroup\" value\n", *argv); |
| 423 | addattr32(&req.n, sizeof(req), FRA_SUPPRESS_IFGROUP, group); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 424 | } else if (strcmp(*argv, "dev") == 0 || |
| 425 | strcmp(*argv, "iif") == 0) { |
| 426 | NEXT_ARG(); |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 427 | addattr_l(&req.n, sizeof(req), FRA_IFNAME, *argv, strlen(*argv)+1); |
Patrick McHardy | 85eae22 | 2009-12-03 20:07:14 +0000 | [diff] [blame] | 428 | } else if (strcmp(*argv, "oif") == 0) { |
| 429 | NEXT_ARG(); |
| 430 | addattr_l(&req.n, sizeof(req), FRA_OIFNAME, *argv, strlen(*argv)+1); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 431 | } else if (strcmp(*argv, "nat") == 0 || |
| 432 | matches(*argv, "map-to") == 0) { |
| 433 | NEXT_ARG(); |
net[shemminger]!shemminger | 526afe4 | 2005-01-17 23:27:23 +0000 | [diff] [blame] | 434 | fprintf(stderr, "Warning: route NAT is deprecated\n"); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 435 | addattr32(&req.n, sizeof(req), RTA_GATEWAY, get_addr32(*argv)); |
| 436 | req.r.rtm_type = RTN_NAT; |
| 437 | } else { |
| 438 | int type; |
| 439 | |
| 440 | if (strcmp(*argv, "type") == 0) { |
| 441 | NEXT_ARG(); |
| 442 | } |
| 443 | if (matches(*argv, "help") == 0) |
| 444 | usage(); |
Thomas Graf | 6b469ca | 2007-03-27 02:04:10 +0200 | [diff] [blame] | 445 | else if (matches(*argv, "goto") == 0) { |
| 446 | __u32 target; |
| 447 | type = FR_ACT_GOTO; |
| 448 | NEXT_ARG(); |
| 449 | if (get_u32(&target, *argv, 0)) |
| 450 | invarg("invalid target\n", *argv); |
| 451 | addattr32(&req.n, sizeof(req), FRA_GOTO, target); |
| 452 | } else if (matches(*argv, "nop") == 0) |
| 453 | type = FR_ACT_NOP; |
| 454 | else if (rtnl_rtntype_a2n(&type, *argv)) |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 455 | invarg("Failed to parse rule type", *argv); |
| 456 | req.r.rtm_type = type; |
Thomas Graf | 6b469ca | 2007-03-27 02:04:10 +0200 | [diff] [blame] | 457 | table_ok = 1; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 458 | } |
| 459 | argc--; |
| 460 | argv++; |
| 461 | } |
| 462 | |
| 463 | if (req.r.rtm_family == AF_UNSPEC) |
| 464 | req.r.rtm_family = AF_INET; |
| 465 | |
| 466 | if (!table_ok && cmd == RTM_NEWRULE) |
| 467 | req.r.rtm_table = RT_TABLE_MAIN; |
| 468 | |
Stephen Hemminger | c079e12 | 2015-05-27 12:26:14 -0700 | [diff] [blame] | 469 | if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) |
Stephen Hemminger | 076ae70 | 2015-05-06 09:53:41 -0700 | [diff] [blame] | 470 | return -2; |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 471 | |
| 472 | return 0; |
| 473 | } |
| 474 | |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 475 | |
| 476 | static int flush_rule(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) |
| 477 | { |
shemminger | b77caeb | 2005-10-12 22:32:34 +0000 | [diff] [blame] | 478 | struct rtnl_handle rth2; |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 479 | struct rtmsg *r = NLMSG_DATA(n); |
| 480 | int len = n->nlmsg_len; |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 481 | struct rtattr * tb[FRA_MAX+1]; |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 482 | |
| 483 | len -= NLMSG_LENGTH(sizeof(*r)); |
| 484 | if (len < 0) |
| 485 | return -1; |
| 486 | |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 487 | parse_rtattr(tb, FRA_MAX, RTM_RTA(r), len); |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 488 | |
Patrick McHardy | ad1a12d | 2007-08-22 10:26:12 -0700 | [diff] [blame] | 489 | if (tb[FRA_PRIORITY]) { |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 490 | n->nlmsg_type = RTM_DELRULE; |
| 491 | n->nlmsg_flags = NLM_F_REQUEST; |
| 492 | |
shemminger | b77caeb | 2005-10-12 22:32:34 +0000 | [diff] [blame] | 493 | if (rtnl_open(&rth2, 0) < 0) |
| 494 | return -1; |
| 495 | |
Stephen Hemminger | c079e12 | 2015-05-27 12:26:14 -0700 | [diff] [blame] | 496 | if (rtnl_talk(&rth2, n, NULL, 0) < 0) |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 497 | return -2; |
shemminger | b77caeb | 2005-10-12 22:32:34 +0000 | [diff] [blame] | 498 | |
| 499 | rtnl_close(&rth2); |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 500 | } |
| 501 | |
| 502 | return 0; |
| 503 | } |
| 504 | |
| 505 | static int iprule_flush(int argc, char **argv) |
| 506 | { |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 507 | int af = preferred_family; |
| 508 | |
| 509 | if (af == AF_UNSPEC) |
| 510 | af = AF_INET; |
| 511 | |
| 512 | if (argc > 0) { |
shemminger | 6608184 | 2005-08-16 21:10:51 +0000 | [diff] [blame] | 513 | fprintf(stderr, "\"ip rule flush\" does not allow arguments\n"); |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 514 | return -1; |
| 515 | } |
| 516 | |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 517 | if (rtnl_wilddump_request(&rth, af, RTM_GETRULE) < 0) { |
| 518 | perror("Cannot send dump request"); |
| 519 | return 1; |
| 520 | } |
| 521 | |
Stephen Hemminger | cd70f3f | 2011-12-28 10:37:12 -0800 | [diff] [blame] | 522 | if (rtnl_dump_filter(&rth, flush_rule, NULL) < 0) { |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 523 | fprintf(stderr, "Flush terminated\n"); |
| 524 | return 1; |
| 525 | } |
| 526 | |
| 527 | return 0; |
| 528 | } |
| 529 | |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 530 | int do_iprule(int argc, char **argv) |
| 531 | { |
| 532 | if (argc < 1) { |
Kirill Tkhai | 2f4e171 | 2015-10-20 13:41:48 +0300 | [diff] [blame] | 533 | return iprule_list_or_save(0, NULL, 0); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 534 | } else if (matches(argv[0], "list") == 0 || |
| 535 | matches(argv[0], "lst") == 0 || |
| 536 | matches(argv[0], "show") == 0) { |
Kirill Tkhai | 2f4e171 | 2015-10-20 13:41:48 +0300 | [diff] [blame] | 537 | return iprule_list_or_save(argc-1, argv+1, 0); |
| 538 | } else if (matches(argv[0], "save") == 0) { |
| 539 | return iprule_list_or_save(argc-1, argv+1, 1); |
| 540 | } else if (matches(argv[0], "restore") == 0) { |
| 541 | return iprule_restore(); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 542 | } else if (matches(argv[0], "add") == 0) { |
| 543 | return iprule_modify(RTM_NEWRULE, argc-1, argv+1); |
| 544 | } else if (matches(argv[0], "delete") == 0) { |
| 545 | return iprule_modify(RTM_DELRULE, argc-1, argv+1); |
osdl.net!shemminger | 50772dc | 2004-12-07 21:48:29 +0000 | [diff] [blame] | 546 | } else if (matches(argv[0], "flush") == 0) { |
| 547 | return iprule_flush(argc-1, argv+1); |
osdl.org!shemminger | aba5acd | 2004-04-15 20:56:59 +0000 | [diff] [blame] | 548 | } else if (matches(argv[0], "help") == 0) |
| 549 | usage(); |
| 550 | |
| 551 | fprintf(stderr, "Command \"%s\" is unknown, try \"ip rule help\".\n", *argv); |
| 552 | exit(-1); |
| 553 | } |
| 554 | |
Patrick McHardy | b6c8e80 | 2010-06-09 17:41:10 +0200 | [diff] [blame] | 555 | int do_multirule(int argc, char **argv) |
| 556 | { |
| 557 | switch (preferred_family) { |
| 558 | case AF_UNSPEC: |
| 559 | case AF_INET: |
| 560 | preferred_family = RTNL_FAMILY_IPMR; |
| 561 | break; |
| 562 | case AF_INET6: |
| 563 | preferred_family = RTNL_FAMILY_IP6MR; |
| 564 | break; |
Ben Greear | 0d1c9b5 | 2010-07-15 15:48:10 -0700 | [diff] [blame] | 565 | case RTNL_FAMILY_IPMR: |
| 566 | case RTNL_FAMILY_IP6MR: |
| 567 | break; |
Patrick McHardy | b6c8e80 | 2010-06-09 17:41:10 +0200 | [diff] [blame] | 568 | default: |
Ben Greear | 0d1c9b5 | 2010-07-15 15:48:10 -0700 | [diff] [blame] | 569 | fprintf(stderr, "Multicast rules are only supported for IPv4/IPv6, was: %i\n", |
| 570 | preferred_family); |
Patrick McHardy | b6c8e80 | 2010-06-09 17:41:10 +0200 | [diff] [blame] | 571 | exit(-1); |
| 572 | } |
| 573 | |
| 574 | return do_iprule(argc, argv); |
| 575 | } |