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Commit | Line | Data |
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e06c7f7e CW |
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 | ||
9dca899b | 27 | static unsigned int filter_index; |
e06c7f7e CW |
28 | |
29 | static void usage(void) | |
30 | { | |
d8b75d1a | 31 | fprintf(stderr, "Usage: bridge mdb { add | del } dev DEV port PORT grp GROUP [permanent | temp]\n"); |
e06c7f7e CW |
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)) | |
0ff8f578 | 56 | fprintf(f, "dev %s port %s grp %s %s\n", ll_index_to_name(ifindex), |
e06c7f7e | 57 | ll_index_to_name(e->ifindex), |
d8b75d1a CW |
58 | inet_ntop(AF_INET, &e->addr.u.ip4, abuf, sizeof(abuf)), |
59 | (e->state & MDB_PERMANENT) ? "permanent" : "temp"); | |
e06c7f7e | 60 | else |
0ff8f578 | 61 | fprintf(f, "dev %s port %s grp %s %s\n", ll_index_to_name(ifindex), |
e06c7f7e | 62 | ll_index_to_name(e->ifindex), |
d8b75d1a CW |
63 | inet_ntop(AF_INET6, &e->addr.u.ip6, abuf, sizeof(abuf)), |
64 | (e->state & MDB_PERMANENT) ? "permanent" : "temp"); | |
e06c7f7e CW |
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 | ||
4a4ee616 CW |
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", | |
e06c7f7e CW |
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"); | |
42ecedd4 | 148 | return -1; |
e06c7f7e CW |
149 | } |
150 | ||
151 | if (rtnl_dump_filter(&rth, print_mdb, stdout) < 0) { | |
152 | fprintf(stderr, "Dump terminated\n"); | |
42ecedd4 | 153 | return -1; |
e06c7f7e CW |
154 | } |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
9dca6767 CW |
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; | |
d8b75d1a CW |
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 */ | |
9dca6767 | 192 | } else { |
9dca6767 CW |
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"); | |
42ecedd4 | 201 | return -1; |
9dca6767 CW |
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 | ||
c079e121 | 227 | if (rtnl_talk(&rth, &req.n, NULL, 0) < 0) |
42ecedd4 | 228 | return -1; |
9dca6767 CW |
229 | |
230 | return 0; | |
231 | } | |
232 | ||
e06c7f7e CW |
233 | int do_mdb(int argc, char **argv) |
234 | { | |
235 | ll_init_map(&rth); | |
236 | ||
237 | if (argc > 0) { | |
9dca6767 CW |
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 | ||
e06c7f7e CW |
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 | } |