| /* |
| * link_vti.c VTI driver module |
| * |
| * 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: Herbert Xu <herbert@gondor.apana.org.au> |
| * Saurabh Mohan <saurabh.mohan@vyatta.com> Modified link_gre.c for VTI |
| */ |
| |
| #include <string.h> |
| #include <net/if.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <arpa/inet.h> |
| |
| #include <linux/ip.h> |
| #include <linux/if_tunnel.h> |
| #include "rt_names.h" |
| #include "utils.h" |
| #include "ip_common.h" |
| #include "tunnel.h" |
| |
| |
| static void print_usage(FILE *f) |
| { |
| fprintf(f, "Usage: ip link { add | set | change | replace | del } NAME\n"); |
| fprintf(f, " type { vti } [ remote ADDR ] [ local ADDR ]\n"); |
| fprintf(f, " [ [i|o]key KEY ]\n"); |
| fprintf(f, " [ dev PHYS_DEV ]\n"); |
| fprintf(f, "\n"); |
| fprintf(f, "Where: NAME := STRING\n"); |
| fprintf(f, " ADDR := { IP_ADDRESS }\n"); |
| fprintf(f, " KEY := { DOTTED_QUAD | NUMBER }\n"); |
| } |
| |
| static void usage(void) __attribute__((noreturn)); |
| static void usage(void) |
| { |
| print_usage(stderr); |
| exit(-1); |
| } |
| |
| static int vti_parse_opt(struct link_util *lu, int argc, char **argv, |
| struct nlmsghdr *n) |
| { |
| struct { |
| struct nlmsghdr n; |
| struct ifinfomsg i; |
| char buf[1024]; |
| } req; |
| struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1); |
| struct rtattr *tb[IFLA_MAX + 1]; |
| struct rtattr *linkinfo[IFLA_INFO_MAX+1]; |
| struct rtattr *vtiinfo[IFLA_VTI_MAX + 1]; |
| unsigned ikey = 0; |
| unsigned okey = 0; |
| unsigned saddr = 0; |
| unsigned daddr = 0; |
| unsigned link = 0; |
| int len; |
| |
| if (!(n->nlmsg_flags & NLM_F_CREATE)) { |
| memset(&req, 0, sizeof(req)); |
| |
| req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)); |
| req.n.nlmsg_flags = NLM_F_REQUEST; |
| req.n.nlmsg_type = RTM_GETLINK; |
| req.i.ifi_family = preferred_family; |
| req.i.ifi_index = ifi->ifi_index; |
| |
| if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0) { |
| get_failed: |
| fprintf(stderr, |
| "Failed to get existing tunnel info.\n"); |
| return -1; |
| } |
| |
| len = req.n.nlmsg_len; |
| len -= NLMSG_LENGTH(sizeof(*ifi)); |
| if (len < 0) |
| goto get_failed; |
| |
| parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), len); |
| |
| if (!tb[IFLA_LINKINFO]) |
| goto get_failed; |
| |
| parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]); |
| |
| if (!linkinfo[IFLA_INFO_DATA]) |
| goto get_failed; |
| |
| parse_rtattr_nested(vtiinfo, IFLA_VTI_MAX, |
| linkinfo[IFLA_INFO_DATA]); |
| |
| if (vtiinfo[IFLA_VTI_IKEY]) |
| ikey = *(__u32 *)RTA_DATA(vtiinfo[IFLA_VTI_IKEY]); |
| |
| if (vtiinfo[IFLA_VTI_OKEY]) |
| okey = *(__u32 *)RTA_DATA(vtiinfo[IFLA_VTI_OKEY]); |
| |
| if (vtiinfo[IFLA_VTI_LOCAL]) |
| saddr = *(__u32 *)RTA_DATA(vtiinfo[IFLA_VTI_LOCAL]); |
| |
| if (vtiinfo[IFLA_VTI_REMOTE]) |
| daddr = *(__u32 *)RTA_DATA(vtiinfo[IFLA_VTI_REMOTE]); |
| |
| if (vtiinfo[IFLA_VTI_LINK]) |
| link = *(__u8 *)RTA_DATA(vtiinfo[IFLA_VTI_LINK]); |
| } |
| |
| while (argc > 0) { |
| if (!matches(*argv, "key")) { |
| unsigned uval; |
| |
| NEXT_ARG(); |
| if (strchr(*argv, '.')) |
| uval = get_addr32(*argv); |
| else { |
| if (get_unsigned(&uval, *argv, 0) < 0) { |
| fprintf(stderr, |
| "Invalid value for \"key\": \"%s\"; it should be an unsigned integer\n", *argv); |
| exit(-1); |
| } |
| uval = htonl(uval); |
| } |
| |
| ikey = okey = uval; |
| } else if (!matches(*argv, "ikey")) { |
| unsigned uval; |
| |
| NEXT_ARG(); |
| if (strchr(*argv, '.')) |
| uval = get_addr32(*argv); |
| else { |
| if (get_unsigned(&uval, *argv, 0) < 0) { |
| fprintf(stderr, "invalid value for \"ikey\": \"%s\"; it should be an unsigned integer\n", *argv); |
| exit(-1); |
| } |
| uval = htonl(uval); |
| } |
| ikey = uval; |
| } else if (!matches(*argv, "okey")) { |
| unsigned uval; |
| |
| NEXT_ARG(); |
| if (strchr(*argv, '.')) |
| uval = get_addr32(*argv); |
| else { |
| if (get_unsigned(&uval, *argv, 0) < 0) { |
| fprintf(stderr, "invalid value for \"okey\": \"%s\"; it should be an unsigned integer\n", *argv); |
| exit(-1); |
| } |
| uval = htonl(uval); |
| } |
| okey = uval; |
| } else if (!matches(*argv, "remote")) { |
| NEXT_ARG(); |
| if (!strcmp(*argv, "any")) { |
| fprintf(stderr, "invalid value for \"remote\": \"%s\"\n", *argv); |
| exit(-1); |
| } else { |
| daddr = get_addr32(*argv); |
| } |
| } else if (!matches(*argv, "local")) { |
| NEXT_ARG(); |
| if (!strcmp(*argv, "any")) { |
| fprintf(stderr, "invalid value for \"local\": \"%s\"\n", *argv); |
| exit(-1); |
| } else { |
| saddr = get_addr32(*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 |
| usage(); |
| argc--; argv++; |
| } |
| |
| addattr32(n, 1024, IFLA_VTI_IKEY, ikey); |
| addattr32(n, 1024, IFLA_VTI_OKEY, okey); |
| addattr_l(n, 1024, IFLA_VTI_LOCAL, &saddr, 4); |
| addattr_l(n, 1024, IFLA_VTI_REMOTE, &daddr, 4); |
| if (link) |
| addattr32(n, 1024, IFLA_VTI_LINK, link); |
| |
| return 0; |
| } |
| |
| static void vti_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) |
| { |
| char s1[1024]; |
| char s2[64]; |
| const char *local = "any"; |
| const char *remote = "any"; |
| |
| if (!tb) |
| return; |
| |
| if (tb[IFLA_VTI_REMOTE]) { |
| unsigned addr = *(__u32 *)RTA_DATA(tb[IFLA_VTI_REMOTE]); |
| |
| if (addr) |
| remote = format_host(AF_INET, 4, &addr, s1, sizeof(s1)); |
| } |
| |
| fprintf(f, "remote %s ", remote); |
| |
| if (tb[IFLA_VTI_LOCAL]) { |
| unsigned addr = *(__u32 *)RTA_DATA(tb[IFLA_VTI_LOCAL]); |
| |
| if (addr) |
| local = format_host(AF_INET, 4, &addr, s1, sizeof(s1)); |
| } |
| |
| fprintf(f, "local %s ", local); |
| |
| if (tb[IFLA_VTI_LINK] && *(__u32 *)RTA_DATA(tb[IFLA_VTI_LINK])) { |
| unsigned link = *(__u32 *)RTA_DATA(tb[IFLA_VTI_LINK]); |
| const char *n = if_indextoname(link, s2); |
| |
| if (n) |
| fprintf(f, "dev %s ", n); |
| else |
| fprintf(f, "dev %u ", link); |
| } |
| |
| if (tb[IFLA_VTI_IKEY]) { |
| inet_ntop(AF_INET, RTA_DATA(tb[IFLA_VTI_IKEY]), s2, sizeof(s2)); |
| fprintf(f, "ikey %s ", s2); |
| } |
| |
| if (tb[IFLA_VTI_OKEY]) { |
| inet_ntop(AF_INET, RTA_DATA(tb[IFLA_VTI_OKEY]), s2, sizeof(s2)); |
| fprintf(f, "okey %s ", s2); |
| } |
| } |
| |
| static void vti_print_help(struct link_util *lu, int argc, char **argv, |
| FILE *f) |
| { |
| print_usage(f); |
| } |
| |
| struct link_util vti_link_util = { |
| .id = "vti", |
| .maxattr = IFLA_VTI_MAX, |
| .parse_opt = vti_parse_opt, |
| .print_opt = vti_print_opt, |
| .print_help = vti_print_help, |
| }; |