Stephen Hemminger | a5494df | 2012-09-24 12:48:29 -0700 | [diff] [blame^] | 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 | }; |