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a5494df2 SH |
1 | /* |
2 | * iplink_vxlan.c VXLAN device support | |
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: Stephen Hemminger <shemminger@vyatta.com | |
10 | */ | |
11 | ||
12 | #include <stdio.h> | |
13 | #include <stdlib.h> | |
14 | #include <string.h> | |
15 | #include <net/if.h> | |
16 | #include <linux/ip.h> | |
17 | #include <linux/if_link.h> | |
18 | #include <arpa/inet.h> | |
19 | ||
20 | #include "rt_names.h" | |
21 | #include "utils.h" | |
22 | #include "ip_common.h" | |
23 | ||
24 | static void explain(void) | |
25 | { | |
26 | fprintf(stderr, "Usage: ... vxlan id VNI [ group ADDR ] [ local ADDR ]\n"); | |
27 | fprintf(stderr, " [ ttl TTL ] [ tos TOS ] [ [no]learning ] [ dev PHYS_DEV ]\n"); | |
28 | fprintf(stderr, "\n"); | |
29 | fprintf(stderr, "Where: VNI := 0-16777215\n"); | |
30 | fprintf(stderr, " ADDR := { IP_ADDRESS | any }\n"); | |
31 | fprintf(stderr, " TOS := { NUMBER | inherit }\n"); | |
32 | fprintf(stderr, " TTL := { 1..255 | inherit }\n"); | |
33 | } | |
34 | ||
35 | static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv, | |
36 | struct nlmsghdr *n) | |
37 | { | |
38 | __u32 vni = 0; | |
39 | int vni_set = 0; | |
40 | __u32 saddr = 0; | |
41 | __u32 gaddr = 0; | |
42 | unsigned link = 0; | |
43 | __u8 tos = 0; | |
44 | __u8 ttl = 0; | |
45 | __u8 learning = 1; | |
46 | __u8 noage = 0; | |
47 | __u32 age = 0; | |
48 | __u32 maxaddr = 0; | |
49 | ||
50 | while (argc > 0) { | |
51 | if (!matches(*argv, "id") || | |
52 | !matches(*argv, "vni")) { | |
53 | NEXT_ARG(); | |
54 | if (get_u32(&vni, *argv, 0) || | |
55 | vni >= 1u << 24) | |
56 | invarg("invalid id", *argv); | |
57 | vni_set = 1; | |
58 | } else if (!matches(*argv, "group")) { | |
59 | NEXT_ARG(); | |
60 | gaddr = get_addr32(*argv); | |
61 | ||
62 | if (!IN_MULTICAST(ntohl(gaddr))) | |
63 | invarg("invald group address", *argv); | |
64 | } else if (!matches(*argv, "local")) { | |
65 | NEXT_ARG(); | |
66 | if (strcmp(*argv, "any")) | |
67 | saddr = get_addr32(*argv); | |
68 | if (IN_MULTICAST(ntohl(saddr))) | |
69 | invarg("invalid local address", *argv); | |
70 | } else if (!matches(*argv, "dev")) { | |
71 | NEXT_ARG(); | |
72 | link = if_nametoindex(*argv); | |
73 | if (link == 0) | |
74 | exit(-1); | |
75 | } else if (!matches(*argv, "ttl") || | |
76 | !matches(*argv, "hoplimit")) { | |
77 | unsigned uval; | |
78 | ||
79 | NEXT_ARG(); | |
80 | if (strcmp(*argv, "inherit") != 0) { | |
81 | if (get_unsigned(&uval, *argv, 0)) | |
82 | invarg("invalid TTL\n", *argv); | |
83 | if (uval > 255) | |
84 | invarg("TTL must be <= 255\n", *argv); | |
85 | ttl = uval; | |
86 | } | |
87 | } else if (!matches(*argv, "tos") || | |
88 | !matches(*argv, "dsfield")) { | |
89 | __u32 uval; | |
90 | ||
91 | NEXT_ARG(); | |
92 | if (strcmp(*argv, "inherit") != 0) { | |
93 | if (rtnl_dsfield_a2n(&uval, *argv)) | |
94 | invarg("bad TOS value", *argv); | |
95 | tos = uval; | |
96 | } else | |
97 | tos = 1; | |
98 | } else if (!matches(*argv, "ageing")) { | |
99 | NEXT_ARG(); | |
100 | if (strcmp(*argv, "none") == 0) | |
101 | noage = 1; | |
102 | else if (get_u32(&age, *argv, 0)) | |
103 | invarg("ageing timer\n", *argv); | |
104 | } else if (!matches(*argv, "maxaddress")) { | |
105 | NEXT_ARG(); | |
106 | if (strcmp(*argv, "unlimited") == 0) | |
107 | maxaddr = 0; | |
108 | else if (get_u32(&maxaddr, *argv, 0)) | |
109 | invarg("max addresses\n", *argv); | |
110 | } else if (!matches(*argv, "nolearning")) { | |
111 | learning = 0; | |
112 | } else if (!matches(*argv, "learning")) { | |
113 | learning = 1; | |
114 | } else if (matches(*argv, "help") == 0) { | |
115 | explain(); | |
116 | return -1; | |
117 | } else { | |
118 | fprintf(stderr, "vxlan: what is \"%s\"?\n", *argv); | |
119 | explain(); | |
120 | return -1; | |
121 | } | |
122 | argc--, argv++; | |
123 | } | |
124 | ||
125 | if (!vni_set) { | |
126 | fprintf(stderr, "vxlan: missing virtual network identifier\n"); | |
127 | return -1; | |
128 | } | |
129 | addattr32(n, 1024, IFLA_VXLAN_ID, vni); | |
130 | addattr_l(n, 1024, IFLA_VXLAN_GROUP, &gaddr, 4); | |
131 | addattr_l(n, 1024, IFLA_VXLAN_LOCAL, &saddr, 4); | |
132 | if (link) | |
133 | addattr32(n, 1024, IFLA_VXLAN_LINK, link); | |
134 | addattr8(n, 1024, IFLA_VXLAN_TTL, ttl); | |
135 | addattr8(n, 1024, IFLA_VXLAN_TOS, tos); | |
136 | addattr8(n, 1024, IFLA_VXLAN_LEARNING, learning); | |
137 | if (noage) | |
138 | addattr32(n, 1024, IFLA_VXLAN_AGEING, 0); | |
139 | else if (age) | |
140 | addattr32(n, 1024, IFLA_VXLAN_AGEING, age); | |
141 | if (maxaddr) | |
142 | addattr32(n, 1024, IFLA_VXLAN_LIMIT, maxaddr); | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
148 | { | |
149 | __u32 vni; | |
150 | unsigned link; | |
151 | char s1[1024]; | |
152 | char s2[64]; | |
153 | ||
154 | if (!tb) | |
155 | return; | |
156 | ||
157 | if (!tb[IFLA_VXLAN_ID] || | |
158 | RTA_PAYLOAD(tb[IFLA_VXLAN_ID]) < sizeof(__u32)) | |
159 | return; | |
160 | ||
161 | vni = rta_getattr_u32(tb[IFLA_VXLAN_ID]); | |
162 | fprintf(f, "id %u ", vni); | |
163 | ||
164 | if (tb[IFLA_VXLAN_GROUP]) { | |
165 | __u32 addr = rta_getattr_u32(tb[IFLA_VXLAN_GROUP]); | |
166 | ||
167 | if (addr) | |
168 | fprintf(f, "group %s ", | |
169 | format_host(AF_INET, 4, &addr, s1, sizeof(s1))); | |
170 | } | |
171 | ||
172 | if (tb[IFLA_VXLAN_LOCAL]) { | |
173 | unsigned addr = rta_getattr_u32(tb[IFLA_VXLAN_LOCAL]); | |
174 | ||
175 | if (addr) | |
176 | fprintf(f, "local %s ", | |
177 | format_host(AF_INET, 4, &addr, s1, sizeof(s1))); | |
178 | } | |
179 | ||
180 | if (tb[IFLA_VXLAN_LINK] && | |
181 | (link = rta_getattr_u32(tb[IFLA_VXLAN_LINK]))) { | |
182 | const char *n = if_indextoname(link, s2); | |
183 | ||
184 | if (n) | |
185 | fprintf(f, "dev %s ", n); | |
186 | else | |
187 | fprintf(f, "dev %u ", link); | |
188 | } | |
189 | ||
190 | if (tb[IFLA_VXLAN_LEARNING] && | |
191 | !rta_getattr_u8(tb[IFLA_VXLAN_LEARNING])) | |
192 | fputs("nolearning ", f); | |
193 | ||
194 | if (tb[IFLA_VXLAN_TOS]) { | |
195 | __u8 tos = rta_getattr_u8(tb[IFLA_VXLAN_TOS]); | |
196 | ||
197 | if (tos == 1) | |
198 | fprintf(f, "tos inherit "); | |
199 | else | |
200 | fprintf(f, "tos %#x ", tos); | |
201 | } | |
202 | ||
203 | if (tb[IFLA_VXLAN_TTL]) { | |
204 | __u8 ttl = rta_getattr_u8(tb[IFLA_VXLAN_TTL]); | |
205 | if (ttl) | |
206 | fprintf(f, "ttl %d ", ttl); | |
207 | } | |
208 | ||
209 | if (tb[IFLA_VXLAN_AGEING]) { | |
210 | __u32 age = rta_getattr_u32(tb[IFLA_VXLAN_AGEING]); | |
211 | if (age == 0) | |
212 | fprintf(f, "ageing none "); | |
213 | else | |
214 | fprintf(f, "ageing %u ", age); | |
215 | } | |
216 | if (tb[IFLA_VXLAN_LIMIT]) { | |
217 | __u32 maxaddr = rta_getattr_u32(tb[IFLA_VXLAN_LIMIT]); | |
218 | if (maxaddr == 0) | |
219 | fprintf(f, "maxaddr unlimited "); | |
220 | else | |
221 | fprintf(f, "maxaddr %u ", maxaddr); | |
222 | } | |
223 | } | |
224 | ||
225 | struct link_util vxlan_link_util = { | |
226 | .id = "vxlan", | |
227 | .maxattr = IFLA_VXLAN_MAX, | |
228 | .parse_opt = vxlan_parse_opt, | |
229 | .print_opt = vxlan_print_opt, | |
230 | }; |