Cong Wang | e06c7f7 | 2012-12-11 16:46:22 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Get mdb table with netlink |
| 3 | */ |
| 4 | |
| 5 | #include <stdio.h> |
| 6 | #include <stdlib.h> |
| 7 | #include <unistd.h> |
| 8 | #include <fcntl.h> |
| 9 | #include <sys/socket.h> |
| 10 | #include <net/if.h> |
| 11 | #include <netinet/in.h> |
| 12 | #include <linux/if_bridge.h> |
| 13 | #include <linux/if_ether.h> |
| 14 | #include <string.h> |
| 15 | #include <arpa/inet.h> |
| 16 | |
| 17 | #include "libnetlink.h" |
| 18 | #include "br_common.h" |
| 19 | #include "rt_names.h" |
| 20 | #include "utils.h" |
| 21 | |
| 22 | #ifndef MDBA_RTA |
| 23 | #define MDBA_RTA(r) \ |
| 24 | ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct br_port_msg)))) |
| 25 | #endif |
| 26 | |
Andreas Henriksson | 9dca899 | 2014-06-04 19:40:37 +0200 | [diff] [blame] | 27 | static unsigned int filter_index; |
Cong Wang | e06c7f7 | 2012-12-11 16:46:22 -0800 | [diff] [blame] | 28 | |
| 29 | static void usage(void) |
| 30 | { |
Cong Wang | d8b75d1 | 2012-12-20 10:54:19 -0800 | [diff] [blame] | 31 | fprintf(stderr, "Usage: bridge mdb { add | del } dev DEV port PORT grp GROUP [permanent | temp]\n"); |
Cong Wang | e06c7f7 | 2012-12-11 16:46:22 -0800 | [diff] [blame] | 32 | fprintf(stderr, " bridge mdb {show} [ dev DEV ]\n"); |
| 33 | exit(-1); |
| 34 | } |
| 35 | |
| 36 | static void br_print_router_ports(FILE *f, struct rtattr *attr) |
| 37 | { |
| 38 | uint32_t *port_ifindex; |
| 39 | struct rtattr *i; |
| 40 | int rem; |
| 41 | |
| 42 | rem = RTA_PAYLOAD(attr); |
| 43 | for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) { |
| 44 | port_ifindex = RTA_DATA(i); |
| 45 | fprintf(f, "%s ", ll_index_to_name(*port_ifindex)); |
| 46 | } |
| 47 | |
| 48 | fprintf(f, "\n"); |
| 49 | } |
| 50 | |
| 51 | static void print_mdb_entry(FILE *f, int ifindex, struct br_mdb_entry *e) |
| 52 | { |
| 53 | SPRINT_BUF(abuf); |
| 54 | |
| 55 | if (e->addr.proto == htons(ETH_P_IP)) |
Cong Wang | 0ff8f57 | 2012-12-20 22:31:55 +0800 | [diff] [blame] | 56 | fprintf(f, "dev %s port %s grp %s %s\n", ll_index_to_name(ifindex), |
Cong Wang | e06c7f7 | 2012-12-11 16:46:22 -0800 | [diff] [blame] | 57 | ll_index_to_name(e->ifindex), |
Cong Wang | d8b75d1 | 2012-12-20 10:54:19 -0800 | [diff] [blame] | 58 | inet_ntop(AF_INET, &e->addr.u.ip4, abuf, sizeof(abuf)), |
| 59 | (e->state & MDB_PERMANENT) ? "permanent" : "temp"); |
Cong Wang | e06c7f7 | 2012-12-11 16:46:22 -0800 | [diff] [blame] | 60 | else |
Cong Wang | 0ff8f57 | 2012-12-20 22:31:55 +0800 | [diff] [blame] | 61 | fprintf(f, "dev %s port %s grp %s %s\n", ll_index_to_name(ifindex), |
Cong Wang | e06c7f7 | 2012-12-11 16:46:22 -0800 | [diff] [blame] | 62 | ll_index_to_name(e->ifindex), |
Cong Wang | d8b75d1 | 2012-12-20 10:54:19 -0800 | [diff] [blame] | 63 | inet_ntop(AF_INET6, &e->addr.u.ip6, abuf, sizeof(abuf)), |
| 64 | (e->state & MDB_PERMANENT) ? "permanent" : "temp"); |
Cong Wang | e06c7f7 | 2012-12-11 16:46:22 -0800 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | static void br_print_mdb_entry(FILE *f, int ifindex, struct rtattr *attr) |
| 68 | { |
| 69 | struct rtattr *i; |
| 70 | int rem; |
| 71 | struct br_mdb_entry *e; |
| 72 | |
| 73 | rem = RTA_PAYLOAD(attr); |
| 74 | for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) { |
| 75 | e = RTA_DATA(i); |
| 76 | print_mdb_entry(f, ifindex, e); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | int print_mdb(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) |
| 81 | { |
| 82 | FILE *fp = arg; |
| 83 | struct br_port_msg *r = NLMSG_DATA(n); |
| 84 | int len = n->nlmsg_len; |
| 85 | struct rtattr * tb[MDBA_MAX+1]; |
| 86 | |
Cong Wang | 4a4ee61 | 2012-12-11 22:23:10 +0000 | [diff] [blame] | 87 | if (n->nlmsg_type != RTM_GETMDB && n->nlmsg_type != RTM_NEWMDB && n->nlmsg_type != RTM_DELMDB) { |
| 88 | fprintf(stderr, "Not RTM_GETMDB, RTM_NEWMDB or RTM_DELMDB: %08x %08x %08x\n", |
Cong Wang | e06c7f7 | 2012-12-11 16:46:22 -0800 | [diff] [blame] | 89 | n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags); |
| 90 | |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | len -= NLMSG_LENGTH(sizeof(*r)); |
| 95 | if (len < 0) { |
| 96 | fprintf(stderr, "BUG: wrong nlmsg len %d\n", len); |
| 97 | return -1; |
| 98 | } |
| 99 | |
| 100 | if (filter_index && filter_index != r->ifindex) |
| 101 | return 0; |
| 102 | |
| 103 | parse_rtattr(tb, MDBA_MAX, MDBA_RTA(r), n->nlmsg_len - NLMSG_LENGTH(sizeof(*r))); |
| 104 | |
| 105 | if (tb[MDBA_MDB]) { |
| 106 | struct rtattr *i; |
| 107 | int rem = RTA_PAYLOAD(tb[MDBA_MDB]); |
| 108 | |
| 109 | for (i = RTA_DATA(tb[MDBA_MDB]); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) |
| 110 | br_print_mdb_entry(fp, r->ifindex, i); |
| 111 | } |
| 112 | |
| 113 | if (tb[MDBA_ROUTER]) { |
| 114 | if (show_details) { |
| 115 | fprintf(fp, "router ports on %s: ", ll_index_to_name(r->ifindex)); |
| 116 | br_print_router_ports(fp, tb[MDBA_ROUTER]); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | static int mdb_show(int argc, char **argv) |
| 124 | { |
| 125 | char *filter_dev = NULL; |
| 126 | |
| 127 | while (argc > 0) { |
| 128 | if (strcmp(*argv, "dev") == 0) { |
| 129 | NEXT_ARG(); |
| 130 | if (filter_dev) |
| 131 | duparg("dev", *argv); |
| 132 | filter_dev = *argv; |
| 133 | } |
| 134 | argc--; argv++; |
| 135 | } |
| 136 | |
| 137 | if (filter_dev) { |
| 138 | filter_index = if_nametoindex(filter_dev); |
| 139 | if (filter_index == 0) { |
| 140 | fprintf(stderr, "Cannot find device \"%s\"\n", |
| 141 | filter_dev); |
| 142 | return -1; |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | if (rtnl_wilddump_request(&rth, PF_BRIDGE, RTM_GETMDB) < 0) { |
| 147 | perror("Cannot send dump request"); |
Roopa Prabhu | 42ecedd | 2015-03-17 19:26:32 -0700 | [diff] [blame] | 148 | return -1; |
Cong Wang | e06c7f7 | 2012-12-11 16:46:22 -0800 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | if (rtnl_dump_filter(&rth, print_mdb, stdout) < 0) { |
| 152 | fprintf(stderr, "Dump terminated\n"); |
Roopa Prabhu | 42ecedd | 2015-03-17 19:26:32 -0700 | [diff] [blame] | 153 | return -1; |
Cong Wang | e06c7f7 | 2012-12-11 16:46:22 -0800 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | return 0; |
| 157 | } |
| 158 | |
Cong Wang | 9dca676 | 2012-12-11 22:23:09 +0000 | [diff] [blame] | 159 | static int mdb_modify(int cmd, int flags, int argc, char **argv) |
| 160 | { |
| 161 | struct { |
| 162 | struct nlmsghdr n; |
| 163 | struct br_port_msg bpm; |
| 164 | char buf[1024]; |
| 165 | } req; |
| 166 | struct br_mdb_entry entry; |
| 167 | char *d = NULL, *p = NULL, *grp = NULL; |
| 168 | |
| 169 | memset(&req, 0, sizeof(req)); |
| 170 | memset(&entry, 0, sizeof(entry)); |
| 171 | |
| 172 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct br_port_msg)); |
| 173 | req.n.nlmsg_flags = NLM_F_REQUEST|flags; |
| 174 | req.n.nlmsg_type = cmd; |
| 175 | req.bpm.family = PF_BRIDGE; |
| 176 | |
| 177 | while (argc > 0) { |
| 178 | if (strcmp(*argv, "dev") == 0) { |
| 179 | NEXT_ARG(); |
| 180 | d = *argv; |
| 181 | } else if (strcmp(*argv, "grp") == 0) { |
| 182 | NEXT_ARG(); |
| 183 | grp = *argv; |
Cong Wang | d8b75d1 | 2012-12-20 10:54:19 -0800 | [diff] [blame] | 184 | } else if (strcmp(*argv, "port") == 0) { |
| 185 | NEXT_ARG(); |
| 186 | p = *argv; |
| 187 | } else if (strcmp(*argv, "permanent") == 0) { |
| 188 | if (cmd == RTM_NEWMDB) |
| 189 | entry.state |= MDB_PERMANENT; |
| 190 | } else if (strcmp(*argv, "temp") == 0) { |
| 191 | ;/* nothing */ |
Cong Wang | 9dca676 | 2012-12-11 22:23:09 +0000 | [diff] [blame] | 192 | } else { |
Cong Wang | 9dca676 | 2012-12-11 22:23:09 +0000 | [diff] [blame] | 193 | if (matches(*argv, "help") == 0) |
| 194 | usage(); |
| 195 | } |
| 196 | argc--; argv++; |
| 197 | } |
| 198 | |
| 199 | if (d == NULL || grp == NULL || p == NULL) { |
| 200 | fprintf(stderr, "Device, group address and port name are required arguments.\n"); |
Roopa Prabhu | 42ecedd | 2015-03-17 19:26:32 -0700 | [diff] [blame] | 201 | return -1; |
Cong Wang | 9dca676 | 2012-12-11 22:23:09 +0000 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | req.bpm.ifindex = ll_name_to_index(d); |
| 205 | if (req.bpm.ifindex == 0) { |
| 206 | fprintf(stderr, "Cannot find device \"%s\"\n", d); |
| 207 | return -1; |
| 208 | } |
| 209 | |
| 210 | entry.ifindex = ll_name_to_index(p); |
| 211 | if (entry.ifindex == 0) { |
| 212 | fprintf(stderr, "Cannot find device \"%s\"\n", p); |
| 213 | return -1; |
| 214 | } |
| 215 | |
| 216 | if (!inet_pton(AF_INET, grp, &entry.addr.u.ip4)) { |
| 217 | if (!inet_pton(AF_INET6, grp, &entry.addr.u.ip6)) { |
| 218 | fprintf(stderr, "Invalid address \"%s\"\n", grp); |
| 219 | return -1; |
| 220 | } else |
| 221 | entry.addr.proto = htons(ETH_P_IPV6); |
| 222 | } else |
| 223 | entry.addr.proto = htons(ETH_P_IP); |
| 224 | |
| 225 | addattr_l(&req.n, sizeof(req), MDBA_SET_ENTRY, &entry, sizeof(entry)); |
| 226 | |
Stephen Hemminger | c079e12 | 2015-05-27 12:26:14 -0700 | [diff] [blame] | 227 | if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) |
Roopa Prabhu | 42ecedd | 2015-03-17 19:26:32 -0700 | [diff] [blame] | 228 | return -1; |
Cong Wang | 9dca676 | 2012-12-11 22:23:09 +0000 | [diff] [blame] | 229 | |
| 230 | return 0; |
| 231 | } |
| 232 | |
Cong Wang | e06c7f7 | 2012-12-11 16:46:22 -0800 | [diff] [blame] | 233 | int do_mdb(int argc, char **argv) |
| 234 | { |
| 235 | ll_init_map(&rth); |
| 236 | |
| 237 | if (argc > 0) { |
Cong Wang | 9dca676 | 2012-12-11 22:23:09 +0000 | [diff] [blame] | 238 | if (matches(*argv, "add") == 0) |
| 239 | return mdb_modify(RTM_NEWMDB, NLM_F_CREATE|NLM_F_EXCL, argc-1, argv+1); |
| 240 | if (matches(*argv, "delete") == 0) |
| 241 | return mdb_modify(RTM_DELMDB, 0, argc-1, argv+1); |
| 242 | |
Cong Wang | e06c7f7 | 2012-12-11 16:46:22 -0800 | [diff] [blame] | 243 | if (matches(*argv, "show") == 0 || |
| 244 | matches(*argv, "lst") == 0 || |
| 245 | matches(*argv, "list") == 0) |
| 246 | return mdb_show(argc-1, argv+1); |
| 247 | if (matches(*argv, "help") == 0) |
| 248 | usage(); |
| 249 | } else |
| 250 | return mdb_show(0, NULL); |
| 251 | |
| 252 | fprintf(stderr, "Command \"%s\" is unknown, try \"bridge mdb help\".\n", *argv); |
| 253 | exit(-1); |
| 254 | } |