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908755dc JL |
1 | /* |
2 | * iplink_geneve.c GENEVE 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: John W. Linville <linville@tuxdriver.com> | |
10 | */ | |
11 | ||
12 | #include <stdio.h> | |
13 | ||
f4739b2e | 14 | #include "rt_names.h" |
908755dc JL |
15 | #include "utils.h" |
16 | #include "ip_common.h" | |
17 | ||
18 | static void print_explain(FILE *f) | |
19 | { | |
20 | fprintf(f, "Usage: ... geneve id VNI remote ADDR\n"); | |
f4739b2e | 21 | fprintf(f, " [ ttl TTL ] [ tos TOS ]\n"); |
9450c5ec | 22 | fprintf(f, " [ dstport PORT ] [ [no]external ]\n"); |
908755dc JL |
23 | fprintf(f, "\n"); |
24 | fprintf(f, "Where: VNI := 0-16777215\n"); | |
25 | fprintf(f, " ADDR := IP_ADDRESS\n"); | |
f4739b2e | 26 | fprintf(f, " TOS := { NUMBER | inherit }\n"); |
f4c05c2e | 27 | fprintf(f, " TTL := { 1..255 | inherit }\n"); |
908755dc JL |
28 | } |
29 | ||
30 | static void explain(void) | |
31 | { | |
32 | print_explain(stderr); | |
33 | } | |
34 | ||
35 | static int geneve_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 daddr = 0; | |
41 | struct in6_addr daddr6 = IN6ADDR_ANY_INIT; | |
f4c05c2e | 42 | __u8 ttl = 0; |
f4739b2e | 43 | __u8 tos = 0; |
9450c5ec PA |
44 | __u16 dstport = 0; |
45 | bool metadata = 0; | |
908755dc JL |
46 | |
47 | while (argc > 0) { | |
48 | if (!matches(*argv, "id") || | |
49 | !matches(*argv, "vni")) { | |
50 | NEXT_ARG(); | |
51 | if (get_u32(&vni, *argv, 0) || | |
52 | vni >= 1u << 24) | |
53 | invarg("invalid id", *argv); | |
54 | vni_set = 1; | |
55 | } else if (!matches(*argv, "remote")) { | |
56 | NEXT_ARG(); | |
57 | if (!inet_get_addr(*argv, &daddr, &daddr6)) { | |
58 | fprintf(stderr, "Invalid address \"%s\"\n", *argv); | |
59 | return -1; | |
60 | } | |
906ac543 | 61 | if (IN6_IS_ADDR_MULTICAST(&daddr6) || IN_MULTICAST(ntohl(daddr))) |
908755dc | 62 | invarg("invalid remote address", *argv); |
f4c05c2e JL |
63 | } else if (!matches(*argv, "ttl") || |
64 | !matches(*argv, "hoplimit")) { | |
65 | unsigned uval; | |
66 | ||
67 | NEXT_ARG(); | |
68 | if (strcmp(*argv, "inherit") != 0) { | |
69 | if (get_unsigned(&uval, *argv, 0)) | |
70 | invarg("invalid TTL", *argv); | |
71 | if (uval > 255) | |
72 | invarg("TTL must be <= 255", *argv); | |
73 | ttl = uval; | |
74 | } | |
f4739b2e JL |
75 | } else if (!matches(*argv, "tos") || |
76 | !matches(*argv, "dsfield")) { | |
77 | __u32 uval; | |
78 | ||
79 | NEXT_ARG(); | |
80 | if (strcmp(*argv, "inherit") != 0) { | |
81 | if (rtnl_dsfield_a2n(&uval, *argv)) | |
82 | invarg("bad TOS value", *argv); | |
83 | tos = uval; | |
84 | } else | |
85 | tos = 1; | |
9450c5ec PA |
86 | } else if (!matches(*argv, "dstport")) { |
87 | NEXT_ARG(); | |
88 | if (get_u16(&dstport, *argv, 0)) | |
89 | invarg("dstport", *argv); | |
90 | } else if (!matches(*argv, "external")) { | |
91 | metadata = true; | |
92 | } else if (!matches(*argv, "noexternal")) { | |
93 | metadata = false; | |
908755dc JL |
94 | } else if (matches(*argv, "help") == 0) { |
95 | explain(); | |
96 | return -1; | |
97 | } else { | |
98 | fprintf(stderr, "geneve: unknown command \"%s\"?\n", *argv); | |
99 | explain(); | |
100 | return -1; | |
101 | } | |
102 | argc--, argv++; | |
103 | } | |
104 | ||
9450c5ec PA |
105 | if (metadata && vni_set) { |
106 | fprintf(stderr, "geneve: both 'external' and vni cannot be specified\n"); | |
908755dc JL |
107 | return -1; |
108 | } | |
109 | ||
9450c5ec PA |
110 | if (!metadata) { |
111 | /* parameter checking make sense only for full geneve tunnels */ | |
112 | if (!vni_set) { | |
113 | fprintf(stderr, "geneve: missing virtual network identifier\n"); | |
114 | return -1; | |
115 | } | |
116 | ||
117 | if (!daddr && memcmp(&daddr6, &in6addr_any, sizeof(daddr6)) == 0) { | |
118 | fprintf(stderr, "geneve: remote link partner not specified\n"); | |
119 | return -1; | |
120 | } | |
908755dc JL |
121 | } |
122 | ||
123 | addattr32(n, 1024, IFLA_GENEVE_ID, vni); | |
124 | if (daddr) | |
125 | addattr_l(n, 1024, IFLA_GENEVE_REMOTE, &daddr, 4); | |
906ac543 JL |
126 | if (memcmp(&daddr6, &in6addr_any, sizeof(daddr6)) != 0) |
127 | addattr_l(n, 1024, IFLA_GENEVE_REMOTE6, &daddr6, sizeof(struct in6_addr)); | |
f4c05c2e | 128 | addattr8(n, 1024, IFLA_GENEVE_TTL, ttl); |
f4739b2e | 129 | addattr8(n, 1024, IFLA_GENEVE_TOS, tos); |
9450c5ec PA |
130 | if (dstport) |
131 | addattr16(n, 1024, IFLA_GENEVE_PORT, htons(dstport)); | |
132 | if (metadata) | |
133 | addattr(n, 1024, IFLA_GENEVE_COLLECT_METADATA); | |
908755dc JL |
134 | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static void geneve_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) | |
139 | { | |
140 | __u32 vni; | |
141 | char s1[1024]; | |
f4739b2e | 142 | __u8 tos; |
908755dc JL |
143 | |
144 | if (!tb) | |
145 | return; | |
146 | ||
147 | if (!tb[IFLA_GENEVE_ID] || | |
148 | RTA_PAYLOAD(tb[IFLA_GENEVE_ID]) < sizeof(__u32)) | |
149 | return; | |
150 | ||
151 | vni = rta_getattr_u32(tb[IFLA_GENEVE_ID]); | |
152 | fprintf(f, "id %u ", vni); | |
153 | ||
154 | if (tb[IFLA_GENEVE_REMOTE]) { | |
155 | __be32 addr = rta_getattr_u32(tb[IFLA_GENEVE_REMOTE]); | |
156 | if (addr) | |
157 | fprintf(f, "remote %s ", | |
158 | format_host(AF_INET, 4, &addr, s1, sizeof(s1))); | |
906ac543 JL |
159 | } else if (tb[IFLA_GENEVE_REMOTE6]) { |
160 | struct in6_addr addr; | |
161 | memcpy(&addr, RTA_DATA(tb[IFLA_GENEVE_REMOTE6]), sizeof(struct in6_addr)); | |
162 | if (memcmp(&addr, &in6addr_any, sizeof(addr)) != 0) { | |
163 | if (IN6_IS_ADDR_MULTICAST(&addr)) | |
164 | fprintf(f, "remote %s ", | |
165 | format_host(AF_INET6, sizeof(struct in6_addr), &addr, s1, sizeof(s1))); | |
166 | } | |
908755dc | 167 | } |
f4c05c2e JL |
168 | |
169 | if (tb[IFLA_GENEVE_TTL]) { | |
170 | __u8 ttl = rta_getattr_u8(tb[IFLA_GENEVE_TTL]); | |
171 | if (ttl) | |
172 | fprintf(f, "ttl %d ", ttl); | |
173 | } | |
f4739b2e JL |
174 | |
175 | if (tb[IFLA_GENEVE_TOS] && | |
176 | (tos = rta_getattr_u8(tb[IFLA_GENEVE_TOS]))) { | |
177 | if (tos == 1) | |
178 | fprintf(f, "tos inherit "); | |
179 | else | |
180 | fprintf(f, "tos %#x ", tos); | |
181 | } | |
9450c5ec PA |
182 | |
183 | if (tb[IFLA_GENEVE_PORT]) | |
184 | fprintf(f, "dstport %u ", | |
185 | ntohs(rta_getattr_u16(tb[IFLA_GENEVE_PORT]))); | |
186 | ||
187 | if (tb[IFLA_GENEVE_COLLECT_METADATA]) | |
188 | fputs("external ", f); | |
189 | ||
908755dc JL |
190 | } |
191 | ||
192 | static void geneve_print_help(struct link_util *lu, int argc, char **argv, | |
193 | FILE *f) | |
194 | { | |
195 | print_explain(f); | |
196 | } | |
197 | ||
198 | struct link_util geneve_link_util = { | |
199 | .id = "geneve", | |
200 | .maxattr = IFLA_GENEVE_MAX, | |
201 | .parse_opt = geneve_parse_opt, | |
202 | .print_opt = geneve_print_opt, | |
203 | .print_help = geneve_print_help, | |
204 | }; |