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4759758c YH |
1 | /* |
2 | * ipaddrlabel.c "ip addrlabel" | |
3 | * | |
4 | * Copyright (C)2007 USAGI/WIDE Project | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
4d98ab00 | 17 | * along with this program; if not, see <http://www.gnu.org/licenses>. |
4759758c YH |
18 | * |
19 | * | |
20 | * Based on iprule.c. | |
21 | * | |
22 | * Authors: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | |
23 | * | |
24 | */ | |
25 | ||
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <unistd.h> | |
4759758c YH |
29 | #include <fcntl.h> |
30 | #include <sys/socket.h> | |
31 | #include <netinet/in.h> | |
32 | #include <netinet/ip.h> | |
33 | #include <arpa/inet.h> | |
34 | #include <string.h> | |
35 | #include <linux/types.h> | |
36 | #include <linux/if_addrlabel.h> | |
37 | ||
38 | #include "rt_names.h" | |
39 | #include "utils.h" | |
40 | #include "ip_common.h" | |
a7ad1c8a | 41 | #include "json_print.h" |
4759758c | 42 | |
56f5daac SH |
43 | #define IFAL_RTA(r) ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrlblmsg)))) |
44 | #define IFAL_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifaddrlblmsg)) | |
4759758c YH |
45 | |
46 | extern struct rtnl_handle rth; | |
47 | ||
48 | static void usage(void) __attribute__((noreturn)); | |
49 | ||
50 | static void usage(void) | |
51 | { | |
27ff1a56 PS |
52 | fprintf(stderr, "Usage: ip addrlabel { add | del } prefix PREFIX [ dev DEV ] [ label LABEL ]\n"); |
53 | fprintf(stderr, " ip addrlabel [ list | flush | help ]\n"); | |
4759758c YH |
54 | exit(-1); |
55 | } | |
56 | ||
57 | int print_addrlabel(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) | |
58 | { | |
4759758c YH |
59 | struct ifaddrlblmsg *ifal = NLMSG_DATA(n); |
60 | int len = n->nlmsg_len; | |
4759758c | 61 | struct rtattr *tb[IFAL_MAX+1]; |
4759758c YH |
62 | |
63 | if (n->nlmsg_type != RTM_NEWADDRLABEL && n->nlmsg_type != RTM_DELADDRLABEL) | |
64 | return 0; | |
65 | ||
66 | len -= NLMSG_LENGTH(sizeof(*ifal)); | |
67 | if (len < 0) | |
68 | return -1; | |
69 | ||
70 | parse_rtattr(tb, IFAL_MAX, IFAL_RTA(ifal), len); | |
71 | ||
a7ad1c8a | 72 | open_json_object(NULL); |
4759758c | 73 | if (n->nlmsg_type == RTM_DELADDRLABEL) |
a7ad1c8a | 74 | print_bool(PRINT_ANY, "deleted", "Deleted ", true); |
4759758c YH |
75 | |
76 | if (tb[IFAL_ADDRESS]) { | |
a7ad1c8a SH |
77 | const char *host |
78 | = format_host_rta(ifal->ifal_family, | |
79 | tb[IFAL_ADDRESS]); | |
80 | ||
81 | print_string(PRINT_FP, NULL, "prefix ", NULL); | |
82 | print_color_string(PRINT_ANY, | |
83 | ifa_family_color(ifal->ifal_family), | |
84 | "address", "%s", host); | |
85 | ||
86 | print_uint(PRINT_ANY, "prefixlen", "/%u ", | |
87 | ifal->ifal_prefixlen); | |
4759758c YH |
88 | } |
89 | ||
a7ad1c8a SH |
90 | if (ifal->ifal_index) { |
91 | print_string(PRINT_FP, NULL, "dev ", NULL); | |
92 | print_color_string(PRINT_ANY, COLOR_IFNAME, | |
93 | "ifname", "%s ", | |
94 | ll_index_to_name(ifal->ifal_index)); | |
95 | } | |
4759758c | 96 | |
97870334 | 97 | if (tb[IFAL_LABEL] && RTA_PAYLOAD(tb[IFAL_LABEL]) == sizeof(uint32_t)) { |
a7ad1c8a | 98 | uint32_t label = rta_getattr_u32(RTA_DATA(tb[IFAL_LABEL])); |
56f5daac | 99 | |
a7ad1c8a SH |
100 | print_uint(PRINT_ANY, |
101 | "label", "label %u ", label); | |
4759758c | 102 | } |
a7ad1c8a SH |
103 | print_string(PRINT_FP, NULL, "\n", ""); |
104 | close_json_object(); | |
4759758c | 105 | |
4759758c YH |
106 | return 0; |
107 | } | |
108 | ||
109 | static int ipaddrlabel_list(int argc, char **argv) | |
110 | { | |
111 | int af = preferred_family; | |
112 | ||
113 | if (af == AF_UNSPEC) | |
114 | af = AF_INET6; | |
115 | ||
116 | if (argc > 0) { | |
117 | fprintf(stderr, "\"ip addrlabel show\" does not take any arguments.\n"); | |
118 | return -1; | |
119 | } | |
120 | ||
121 | if (rtnl_wilddump_request(&rth, af, RTM_GETADDRLABEL) < 0) { | |
122 | perror("Cannot send dump request"); | |
123 | return 1; | |
124 | } | |
125 | ||
a7ad1c8a | 126 | new_json_obj(json); |
cd70f3f5 | 127 | if (rtnl_dump_filter(&rth, print_addrlabel, stdout) < 0) { |
4759758c YH |
128 | fprintf(stderr, "Dump terminated\n"); |
129 | return 1; | |
130 | } | |
a7ad1c8a | 131 | delete_json_obj(); |
4759758c YH |
132 | |
133 | return 0; | |
134 | } | |
135 | ||
136 | ||
137 | static int ipaddrlabel_modify(int cmd, int argc, char **argv) | |
138 | { | |
139 | struct { | |
4806867a | 140 | struct nlmsghdr n; |
4759758c | 141 | struct ifaddrlblmsg ifal; |
56f5daac | 142 | char buf[1024]; |
d17b136f PS |
143 | } req = { |
144 | .n.nlmsg_type = cmd, | |
145 | .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrlblmsg)), | |
146 | .n.nlmsg_flags = NLM_F_REQUEST, | |
147 | .ifal.ifal_family = preferred_family, | |
148 | }; | |
149 | ||
150 | inet_prefix prefix = {}; | |
4759758c | 151 | uint32_t label = 0xffffffffUL; |
6579feea | 152 | char *p = NULL; |
0612519e | 153 | char *l = NULL; |
4759758c | 154 | |
4759758c YH |
155 | if (cmd == RTM_NEWADDRLABEL) { |
156 | req.n.nlmsg_flags |= NLM_F_CREATE|NLM_F_EXCL; | |
157 | } | |
158 | ||
159 | while (argc > 0) { | |
160 | if (strcmp(*argv, "prefix") == 0) { | |
161 | NEXT_ARG(); | |
6579feea | 162 | p = *argv; |
4759758c YH |
163 | get_prefix(&prefix, *argv, preferred_family); |
164 | } else if (strcmp(*argv, "dev") == 0) { | |
165 | NEXT_ARG(); | |
166 | if ((req.ifal.ifal_index = ll_name_to_index(*argv)) == 0) | |
167 | invarg("dev is invalid\n", *argv); | |
168 | } else if (strcmp(*argv, "label") == 0) { | |
169 | NEXT_ARG(); | |
6579feea | 170 | l = *argv; |
4759758c YH |
171 | if (get_u32(&label, *argv, 0) || label == 0xffffffffUL) |
172 | invarg("label is invalid\n", *argv); | |
173 | } | |
174 | argc--; | |
175 | argv++; | |
176 | } | |
6579feea VC |
177 | if (p == NULL) { |
178 | fprintf(stderr, "Not enough information: \"prefix\" argument is required.\n"); | |
179 | return -1; | |
180 | } | |
181 | if (l == NULL) { | |
182 | fprintf(stderr, "Not enough information: \"label\" argument is required.\n"); | |
183 | return -1; | |
184 | } | |
4759758c YH |
185 | addattr32(&req.n, sizeof(req), IFAL_LABEL, label); |
186 | addattr_l(&req.n, sizeof(req), IFAL_ADDRESS, &prefix.data, prefix.bytelen); | |
3490740b | 187 | req.ifal.ifal_prefixlen = prefix.bitlen; |
4759758c YH |
188 | |
189 | if (req.ifal.ifal_family == AF_UNSPEC) | |
190 | req.ifal.ifal_family = AF_INET6; | |
191 | ||
86bf43c7 | 192 | if (rtnl_talk(&rth, &req.n, NULL) < 0) |
906cafe3 | 193 | return -2; |
4759758c YH |
194 | |
195 | return 0; | |
196 | } | |
197 | ||
198 | ||
199 | static int flush_addrlabel(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) | |
200 | { | |
201 | struct rtnl_handle rth2; | |
202 | struct rtmsg *r = NLMSG_DATA(n); | |
203 | int len = n->nlmsg_len; | |
56f5daac | 204 | struct rtattr *tb[IFAL_MAX+1]; |
4759758c YH |
205 | |
206 | len -= NLMSG_LENGTH(sizeof(*r)); | |
207 | if (len < 0) | |
208 | return -1; | |
209 | ||
210 | parse_rtattr(tb, IFAL_MAX, RTM_RTA(r), len); | |
211 | ||
212 | if (tb[IFAL_ADDRESS]) { | |
213 | n->nlmsg_type = RTM_DELADDRLABEL; | |
214 | n->nlmsg_flags = NLM_F_REQUEST; | |
215 | ||
216 | if (rtnl_open(&rth2, 0) < 0) | |
217 | return -1; | |
218 | ||
86bf43c7 | 219 | if (rtnl_talk(&rth2, n, NULL) < 0) |
4759758c YH |
220 | return -2; |
221 | ||
222 | rtnl_close(&rth2); | |
223 | } | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | static int ipaddrlabel_flush(int argc, char **argv) | |
229 | { | |
230 | int af = preferred_family; | |
231 | ||
232 | if (af == AF_UNSPEC) | |
233 | af = AF_INET6; | |
234 | ||
235 | if (argc > 0) { | |
236 | fprintf(stderr, "\"ip addrlabel flush\" does not allow extra arguments\n"); | |
237 | return -1; | |
238 | } | |
239 | ||
240 | if (rtnl_wilddump_request(&rth, af, RTM_GETADDRLABEL) < 0) { | |
241 | perror("Cannot send dump request"); | |
906cafe3 | 242 | return -1; |
4759758c YH |
243 | } |
244 | ||
cd70f3f5 | 245 | if (rtnl_dump_filter(&rth, flush_addrlabel, NULL) < 0) { |
4759758c | 246 | fprintf(stderr, "Flush terminated\n"); |
906cafe3 | 247 | return -1; |
4759758c YH |
248 | } |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | int do_ipaddrlabel(int argc, char **argv) | |
254 | { | |
255 | if (argc < 1) { | |
256 | return ipaddrlabel_list(0, NULL); | |
257 | } else if (matches(argv[0], "list") == 0 || | |
473544d9 | 258 | matches(argv[0], "lst") == 0 || |
4759758c YH |
259 | matches(argv[0], "show") == 0) { |
260 | return ipaddrlabel_list(argc-1, argv+1); | |
261 | } else if (matches(argv[0], "add") == 0) { | |
262 | return ipaddrlabel_modify(RTM_NEWADDRLABEL, argc-1, argv+1); | |
263 | } else if (matches(argv[0], "delete") == 0) { | |
264 | return ipaddrlabel_modify(RTM_DELADDRLABEL, argc-1, argv+1); | |
265 | } else if (matches(argv[0], "flush") == 0) { | |
266 | return ipaddrlabel_flush(argc-1, argv+1); | |
267 | } else if (matches(argv[0], "help") == 0) | |
268 | usage(); | |
269 | ||
270 | fprintf(stderr, "Command \"%s\" is unknown, try \"ip addrlabel help\".\n", *argv); | |
271 | exit(-1); | |
272 | } |