| /* |
| * iplink_vxlan.c VXLAN device support |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| * Authors: Stephen Hemminger <shemminger@vyatta.com |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <net/if.h> |
| #include <linux/ip.h> |
| #include <linux/if_link.h> |
| #include <arpa/inet.h> |
| |
| #include "rt_names.h" |
| #include "utils.h" |
| #include "ip_common.h" |
| |
| static void print_explain(FILE *f) |
| { |
| fprintf(f, "Usage: ... vxlan id VNI [ { group | remote } IP_ADDRESS ] [ local ADDR ]\n"); |
| fprintf(f, " [ ttl TTL ] [ tos TOS ] [ dev PHYS_DEV ]\n"); |
| fprintf(f, " [ dstport PORT ] [ srcport MIN MAX ]\n"); |
| fprintf(f, " [ [no]learning ] [ [no]proxy ] [ [no]rsc ]\n"); |
| fprintf(f, " [ [no]l2miss ] [ [no]l3miss ]\n"); |
| fprintf(f, " [ ageing SECONDS ] [ maxaddress NUMBER ]\n"); |
| fprintf(f, " [ [no]udpcsum ] [ [no]udp6zerocsumtx ] [ [no]udp6zerocsumrx ]\n"); |
| fprintf(f, " [ [no]remcsumtx ] [ [no]remcsumrx ]\n"); |
| fprintf(f, " [ [no]external ] [ gbp ]\n"); |
| fprintf(f, "\n"); |
| fprintf(f, "Where: VNI := 0-16777215\n"); |
| fprintf(f, " ADDR := { IP_ADDRESS | any }\n"); |
| fprintf(f, " TOS := { NUMBER | inherit }\n"); |
| fprintf(f, " TTL := { 1..255 | inherit }\n"); |
| } |
| |
| static void explain(void) |
| { |
| print_explain(stderr); |
| } |
| |
| static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv, |
| struct nlmsghdr *n) |
| { |
| __u32 vni = 0; |
| int vni_set = 0; |
| __u32 saddr = 0; |
| __u32 gaddr = 0; |
| __u32 daddr = 0; |
| struct in6_addr saddr6 = IN6ADDR_ANY_INIT; |
| struct in6_addr gaddr6 = IN6ADDR_ANY_INIT; |
| struct in6_addr daddr6 = IN6ADDR_ANY_INIT; |
| unsigned link = 0; |
| __u8 tos = 0; |
| __u8 ttl = 0; |
| __u8 learning = 1; |
| __u8 proxy = 0; |
| __u8 rsc = 0; |
| __u8 l2miss = 0; |
| __u8 l3miss = 0; |
| __u8 noage = 0; |
| __u32 age = 0; |
| __u32 maxaddr = 0; |
| __u16 dstport = 0; |
| __u8 udpcsum = 0; |
| __u8 udp6zerocsumtx = 0; |
| __u8 udp6zerocsumrx = 0; |
| __u8 remcsumtx = 0; |
| __u8 remcsumrx = 0; |
| __u8 metadata = 0; |
| __u8 gbp = 0; |
| int dst_port_set = 0; |
| struct ifla_vxlan_port_range range = { 0, 0 }; |
| |
| while (argc > 0) { |
| if (!matches(*argv, "id") || |
| !matches(*argv, "vni")) { |
| NEXT_ARG(); |
| if (get_u32(&vni, *argv, 0) || |
| vni >= 1u << 24) |
| invarg("invalid id", *argv); |
| vni_set = 1; |
| } else if (!matches(*argv, "group")) { |
| NEXT_ARG(); |
| if (!inet_get_addr(*argv, &gaddr, &gaddr6)) { |
| fprintf(stderr, "Invalid address \"%s\"\n", *argv); |
| return -1; |
| } |
| if (!IN6_IS_ADDR_MULTICAST(&gaddr6) && !IN_MULTICAST(ntohl(gaddr))) |
| invarg("invalid group address", *argv); |
| } else if (!matches(*argv, "remote")) { |
| NEXT_ARG(); |
| if (!inet_get_addr(*argv, &daddr, &daddr6)) { |
| fprintf(stderr, "Invalid address \"%s\"\n", *argv); |
| return -1; |
| } |
| if (IN6_IS_ADDR_MULTICAST(&daddr6) || IN_MULTICAST(ntohl(daddr))) |
| invarg("invalid remote address", *argv); |
| } else if (!matches(*argv, "local")) { |
| NEXT_ARG(); |
| if (strcmp(*argv, "any")) { |
| if (!inet_get_addr(*argv, &saddr, &saddr6)) { |
| fprintf(stderr, "Invalid address \"%s\"\n", *argv); |
| return -1; |
| } |
| } |
| |
| if (IN_MULTICAST(ntohl(saddr)) || IN6_IS_ADDR_MULTICAST(&saddr6)) |
| invarg("invalid local address", *argv); |
| } else if (!matches(*argv, "dev")) { |
| NEXT_ARG(); |
| link = if_nametoindex(*argv); |
| if (link == 0) { |
| fprintf(stderr, "Cannot find device \"%s\"\n", |
| *argv); |
| exit(-1); |
| } |
| } else if (!matches(*argv, "ttl") || |
| !matches(*argv, "hoplimit")) { |
| unsigned uval; |
| |
| NEXT_ARG(); |
| if (strcmp(*argv, "inherit") != 0) { |
| if (get_unsigned(&uval, *argv, 0)) |
| invarg("invalid TTL", *argv); |
| if (uval > 255) |
| invarg("TTL must be <= 255", *argv); |
| ttl = uval; |
| } |
| } else if (!matches(*argv, "tos") || |
| !matches(*argv, "dsfield")) { |
| __u32 uval; |
| |
| NEXT_ARG(); |
| if (strcmp(*argv, "inherit") != 0) { |
| if (rtnl_dsfield_a2n(&uval, *argv)) |
| invarg("bad TOS value", *argv); |
| tos = uval; |
| } else |
| tos = 1; |
| } else if (!matches(*argv, "ageing")) { |
| NEXT_ARG(); |
| if (strcmp(*argv, "none") == 0) |
| noage = 1; |
| else if (get_u32(&age, *argv, 0)) |
| invarg("ageing timer", *argv); |
| } else if (!matches(*argv, "maxaddress")) { |
| NEXT_ARG(); |
| if (strcmp(*argv, "unlimited") == 0) |
| maxaddr = 0; |
| else if (get_u32(&maxaddr, *argv, 0)) |
| invarg("max addresses", *argv); |
| } else if (!matches(*argv, "port") || |
| !matches(*argv, "srcport")) { |
| __u16 minport, maxport; |
| NEXT_ARG(); |
| if (get_u16(&minport, *argv, 0)) |
| invarg("min port", *argv); |
| NEXT_ARG(); |
| if (get_u16(&maxport, *argv, 0)) |
| invarg("max port", *argv); |
| range.low = htons(minport); |
| range.high = htons(maxport); |
| } else if (!matches(*argv, "dstport")){ |
| NEXT_ARG(); |
| if (get_u16(&dstport, *argv, 0)) |
| invarg("dst port", *argv); |
| dst_port_set = 1; |
| } else if (!matches(*argv, "nolearning")) { |
| learning = 0; |
| } else if (!matches(*argv, "learning")) { |
| learning = 1; |
| } else if (!matches(*argv, "noproxy")) { |
| proxy = 0; |
| } else if (!matches(*argv, "proxy")) { |
| proxy = 1; |
| } else if (!matches(*argv, "norsc")) { |
| rsc = 0; |
| } else if (!matches(*argv, "rsc")) { |
| rsc = 1; |
| } else if (!matches(*argv, "nol2miss")) { |
| l2miss = 0; |
| } else if (!matches(*argv, "l2miss")) { |
| l2miss = 1; |
| } else if (!matches(*argv, "nol3miss")) { |
| l3miss = 0; |
| } else if (!matches(*argv, "l3miss")) { |
| l3miss = 1; |
| } else if (!matches(*argv, "udpcsum")) { |
| udpcsum = 1; |
| } else if (!matches(*argv, "noudpcsum")) { |
| udpcsum = 0; |
| } else if (!matches(*argv, "udp6zerocsumtx")) { |
| udp6zerocsumtx = 1; |
| } else if (!matches(*argv, "noudp6zerocsumtx")) { |
| udp6zerocsumtx = 0; |
| } else if (!matches(*argv, "udp6zerocsumrx")) { |
| udp6zerocsumrx = 1; |
| } else if (!matches(*argv, "noudp6zerocsumrx")) { |
| udp6zerocsumrx = 0; |
| } else if (!matches(*argv, "remcsumtx")) { |
| remcsumtx = 1; |
| } else if (!matches(*argv, "noremcsumtx")) { |
| remcsumtx = 0; |
| } else if (!matches(*argv, "remcsumrx")) { |
| remcsumrx = 1; |
| } else if (!matches(*argv, "noremcsumrx")) { |
| remcsumrx = 0; |
| } else if (!matches(*argv, "external")) { |
| metadata = 1; |
| } else if (!matches(*argv, "noexternal")) { |
| metadata = 0; |
| } else if (!matches(*argv, "gbp")) { |
| gbp = 1; |
| } else if (matches(*argv, "help") == 0) { |
| explain(); |
| return -1; |
| } else { |
| fprintf(stderr, "vxlan: unknown command \"%s\"?\n", *argv); |
| explain(); |
| return -1; |
| } |
| argc--, argv++; |
| } |
| |
| if (metadata && vni_set) { |
| fprintf(stderr, "vxlan: both 'external' and vni cannot be specified\n"); |
| return -1; |
| } |
| |
| if (!metadata && !vni_set) { |
| fprintf(stderr, "vxlan: missing virtual network identifier\n"); |
| return -1; |
| } |
| |
| if ((gaddr && daddr) || |
| (memcmp(&gaddr6, &in6addr_any, sizeof(gaddr6)) && |
| memcmp(&daddr6, &in6addr_any, sizeof(daddr6)))) { |
| fprintf(stderr, "vxlan: both group and remote cannot be specified\n"); |
| return -1; |
| } |
| |
| if (!dst_port_set) { |
| fprintf(stderr, "vxlan: destination port not specified\n" |
| "Will use Linux kernel default (non-standard value)\n"); |
| fprintf(stderr, |
| "Use 'dstport 4789' to get the IANA assigned value\n" |
| "Use 'dstport 0' to get default and quiet this message\n"); |
| } |
| |
| addattr32(n, 1024, IFLA_VXLAN_ID, vni); |
| if (gaddr) |
| addattr_l(n, 1024, IFLA_VXLAN_GROUP, &gaddr, 4); |
| else if (daddr) |
| addattr_l(n, 1024, IFLA_VXLAN_GROUP, &daddr, 4); |
| if (memcmp(&gaddr6, &in6addr_any, sizeof(gaddr6)) != 0) |
| addattr_l(n, 1024, IFLA_VXLAN_GROUP6, &gaddr6, sizeof(struct in6_addr)); |
| else if (memcmp(&daddr6, &in6addr_any, sizeof(daddr6)) != 0) |
| addattr_l(n, 1024, IFLA_VXLAN_GROUP6, &daddr6, sizeof(struct in6_addr)); |
| |
| if (saddr) |
| addattr_l(n, 1024, IFLA_VXLAN_LOCAL, &saddr, 4); |
| else if (memcmp(&saddr6, &in6addr_any, sizeof(saddr6)) != 0) |
| addattr_l(n, 1024, IFLA_VXLAN_LOCAL6, &saddr6, sizeof(struct in6_addr)); |
| |
| if (link) |
| addattr32(n, 1024, IFLA_VXLAN_LINK, link); |
| addattr8(n, 1024, IFLA_VXLAN_TTL, ttl); |
| addattr8(n, 1024, IFLA_VXLAN_TOS, tos); |
| addattr8(n, 1024, IFLA_VXLAN_LEARNING, learning); |
| addattr8(n, 1024, IFLA_VXLAN_PROXY, proxy); |
| addattr8(n, 1024, IFLA_VXLAN_RSC, rsc); |
| addattr8(n, 1024, IFLA_VXLAN_L2MISS, l2miss); |
| addattr8(n, 1024, IFLA_VXLAN_L3MISS, l3miss); |
| addattr8(n, 1024, IFLA_VXLAN_UDP_CSUM, udpcsum); |
| addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, udp6zerocsumtx); |
| addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, udp6zerocsumrx); |
| addattr8(n, 1024, IFLA_VXLAN_REMCSUM_TX, remcsumtx); |
| addattr8(n, 1024, IFLA_VXLAN_REMCSUM_RX, remcsumrx); |
| addattr8(n, 1024, IFLA_VXLAN_COLLECT_METADATA, metadata); |
| |
| if (noage) |
| addattr32(n, 1024, IFLA_VXLAN_AGEING, 0); |
| else if (age) |
| addattr32(n, 1024, IFLA_VXLAN_AGEING, age); |
| if (maxaddr) |
| addattr32(n, 1024, IFLA_VXLAN_LIMIT, maxaddr); |
| if (range.low || range.high) |
| addattr_l(n, 1024, IFLA_VXLAN_PORT_RANGE, |
| &range, sizeof(range)); |
| if (dstport) |
| addattr16(n, 1024, IFLA_VXLAN_PORT, htons(dstport)); |
| |
| if (gbp) |
| addattr_l(n, 1024, IFLA_VXLAN_GBP, NULL, 0); |
| |
| |
| return 0; |
| } |
| |
| static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) |
| { |
| __u32 vni; |
| unsigned link; |
| __u8 tos; |
| __u32 maxaddr; |
| char s1[1024]; |
| char s2[64]; |
| |
| if (!tb) |
| return; |
| |
| if (!tb[IFLA_VXLAN_ID] || |
| RTA_PAYLOAD(tb[IFLA_VXLAN_ID]) < sizeof(__u32)) |
| return; |
| |
| vni = rta_getattr_u32(tb[IFLA_VXLAN_ID]); |
| fprintf(f, "id %u ", vni); |
| |
| if (tb[IFLA_VXLAN_GROUP]) { |
| __be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_GROUP]); |
| if (addr) { |
| if (IN_MULTICAST(ntohl(addr))) |
| fprintf(f, "group %s ", |
| format_host(AF_INET, 4, &addr, s1, sizeof(s1))); |
| else |
| fprintf(f, "remote %s ", |
| format_host(AF_INET, 4, &addr, s1, sizeof(s1))); |
| } |
| } else if (tb[IFLA_VXLAN_GROUP6]) { |
| struct in6_addr addr; |
| memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_GROUP6]), sizeof(struct in6_addr)); |
| if (memcmp(&addr, &in6addr_any, sizeof(addr)) != 0) { |
| if (IN6_IS_ADDR_MULTICAST(&addr)) |
| fprintf(f, "group %s ", |
| format_host(AF_INET6, sizeof(struct in6_addr), &addr, s1, sizeof(s1))); |
| else |
| fprintf(f, "remote %s ", |
| format_host(AF_INET6, sizeof(struct in6_addr), &addr, s1, sizeof(s1))); |
| } |
| } |
| |
| if (tb[IFLA_VXLAN_LOCAL]) { |
| __be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_LOCAL]); |
| if (addr) |
| fprintf(f, "local %s ", |
| format_host(AF_INET, 4, &addr, s1, sizeof(s1))); |
| } else if (tb[IFLA_VXLAN_LOCAL6]) { |
| struct in6_addr addr; |
| memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_LOCAL6]), sizeof(struct in6_addr)); |
| if (memcmp(&addr, &in6addr_any, sizeof(addr)) != 0) |
| fprintf(f, "local %s ", |
| format_host(AF_INET6, sizeof(struct in6_addr), &addr, s1, sizeof(s1))); |
| } |
| |
| if (tb[IFLA_VXLAN_LINK] && |
| (link = rta_getattr_u32(tb[IFLA_VXLAN_LINK]))) { |
| const char *n = if_indextoname(link, s2); |
| |
| if (n) |
| fprintf(f, "dev %s ", n); |
| else |
| fprintf(f, "dev %u ", link); |
| } |
| |
| if (tb[IFLA_VXLAN_PORT_RANGE]) { |
| const struct ifla_vxlan_port_range *r |
| = RTA_DATA(tb[IFLA_VXLAN_PORT_RANGE]); |
| fprintf(f, "srcport %u %u ", ntohs(r->low), ntohs(r->high)); |
| } |
| |
| if (tb[IFLA_VXLAN_PORT]) |
| fprintf(f, "dstport %u ", |
| ntohs(rta_getattr_u16(tb[IFLA_VXLAN_PORT]))); |
| |
| if (tb[IFLA_VXLAN_LEARNING] && |
| !rta_getattr_u8(tb[IFLA_VXLAN_LEARNING])) |
| fputs("nolearning ", f); |
| |
| if (tb[IFLA_VXLAN_PROXY] && rta_getattr_u8(tb[IFLA_VXLAN_PROXY])) |
| fputs("proxy ", f); |
| |
| if (tb[IFLA_VXLAN_RSC] && rta_getattr_u8(tb[IFLA_VXLAN_RSC])) |
| fputs("rsc ", f); |
| |
| if (tb[IFLA_VXLAN_L2MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L2MISS])) |
| fputs("l2miss ", f); |
| |
| if (tb[IFLA_VXLAN_L3MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L3MISS])) |
| fputs("l3miss ", f); |
| |
| if (tb[IFLA_VXLAN_TOS] && |
| (tos = rta_getattr_u8(tb[IFLA_VXLAN_TOS]))) { |
| if (tos == 1) |
| fprintf(f, "tos inherit "); |
| else |
| fprintf(f, "tos %#x ", tos); |
| } |
| |
| if (tb[IFLA_VXLAN_TTL]) { |
| __u8 ttl = rta_getattr_u8(tb[IFLA_VXLAN_TTL]); |
| if (ttl) |
| fprintf(f, "ttl %d ", ttl); |
| } |
| |
| if (tb[IFLA_VXLAN_AGEING]) { |
| __u32 age = rta_getattr_u32(tb[IFLA_VXLAN_AGEING]); |
| if (age == 0) |
| fprintf(f, "ageing none "); |
| else |
| fprintf(f, "ageing %u ", age); |
| } |
| |
| if (tb[IFLA_VXLAN_LIMIT] && |
| ((maxaddr = rta_getattr_u32(tb[IFLA_VXLAN_LIMIT])) != 0)) |
| fprintf(f, "maxaddr %u ", maxaddr); |
| |
| if (tb[IFLA_VXLAN_UDP_CSUM] && rta_getattr_u8(tb[IFLA_VXLAN_UDP_CSUM])) |
| fputs("udpcsum ", f); |
| |
| if (tb[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] && |
| rta_getattr_u8(tb[IFLA_VXLAN_UDP_ZERO_CSUM6_TX])) |
| fputs("udp6zerocsumtx ", f); |
| |
| if (tb[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] && |
| rta_getattr_u8(tb[IFLA_VXLAN_UDP_ZERO_CSUM6_RX])) |
| fputs("udp6zerocsumrx ", f); |
| |
| if (tb[IFLA_VXLAN_REMCSUM_TX] && |
| rta_getattr_u8(tb[IFLA_VXLAN_REMCSUM_TX])) |
| fputs("remcsumtx ", f); |
| |
| if (tb[IFLA_VXLAN_REMCSUM_RX] && |
| rta_getattr_u8(tb[IFLA_VXLAN_REMCSUM_RX])) |
| fputs("remcsumrx ", f); |
| |
| if (tb[IFLA_VXLAN_COLLECT_METADATA] && |
| rta_getattr_u8(tb[IFLA_VXLAN_COLLECT_METADATA])) |
| fputs("external ", f); |
| |
| if (tb[IFLA_VXLAN_GBP]) |
| fputs("gbp ", f); |
| } |
| |
| static void vxlan_print_help(struct link_util *lu, int argc, char **argv, |
| FILE *f) |
| { |
| print_explain(f); |
| } |
| |
| struct link_util vxlan_link_util = { |
| .id = "vxlan", |
| .maxattr = IFLA_VXLAN_MAX, |
| .parse_opt = vxlan_parse_opt, |
| .print_opt = vxlan_print_opt, |
| .print_help = vxlan_print_help, |
| }; |