--- /dev/null
+/*
+ * link_iptnl.c ipip and sit 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: Nicolas Dichtel <nicolas.dichtel@6wind.com>
+ *
+ */
+
+#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 usage(int sit) __attribute__((noreturn));
+static void usage(int sit)
+{
+ fprintf(stderr, "Usage: ip link { add | set | change | replace | del } NAME\n");
+ fprintf(stderr, " type { ipip | sit } [ remote ADDR ] [ local ADDR ]\n");
+ fprintf(stderr, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n");
+ fprintf(stderr, " [ 6rd-prefix ADDR ] [ 6rd-relay_prefix ADDR ] [ 6rd-reset ]\n");
+ if (sit)
+ fprintf(stderr, " [ isatap ]\n");
+ fprintf(stderr, "\n");
+ fprintf(stderr, "Where: NAME := STRING\n");
+ fprintf(stderr, " ADDR := { IP_ADDRESS | any }\n");
+ fprintf(stderr, " TOS := { NUMBER | inherit }\n");
+ fprintf(stderr, " TTL := { 1..255 | inherit }\n");
+ exit(-1);
+}
+
+static int iptunnel_parse_opt(struct link_util *lu, int argc, char **argv,
+ struct nlmsghdr *n)
+{
+ struct {
+ struct nlmsghdr n;
+ struct ifinfomsg i;
+ char buf[2048];
+ } req;
+ struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
+ struct rtattr *tb[IFLA_MAX + 1];
+ struct rtattr *linkinfo[IFLA_INFO_MAX+1];
+ struct rtattr *iptuninfo[IFLA_IPTUN_MAX + 1];
+ int len;
+ __u32 link = 0;
+ __u32 laddr = 0;
+ __u32 raddr = 0;
+ __u8 ttl = 0;
+ __u8 tos = 0;
+ __u8 pmtudisc = 1;
+ __u16 iflags = 0;
+ struct in6_addr ip6rdprefix;
+ __u16 ip6rdprefixlen = 0;
+ __u32 ip6rdrelayprefix = 0;
+ __u16 ip6rdrelayprefixlen = 0;
+
+ memset(&ip6rdprefix, 0, sizeof(ip6rdprefix));
+
+ 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, 0, 0, &req.n) < 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(iptuninfo, IFLA_IPTUN_MAX,
+ linkinfo[IFLA_INFO_DATA]);
+
+ if (iptuninfo[IFLA_IPTUN_LOCAL])
+ laddr = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LOCAL]);
+
+ if (iptuninfo[IFLA_IPTUN_REMOTE])
+ raddr = rta_getattr_u32(iptuninfo[IFLA_IPTUN_REMOTE]);
+
+ if (iptuninfo[IFLA_IPTUN_TTL])
+ ttl = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TTL]);
+
+ if (iptuninfo[IFLA_IPTUN_TOS])
+ tos = rta_getattr_u8(iptuninfo[IFLA_IPTUN_TOS]);
+
+ if (iptuninfo[IFLA_IPTUN_PMTUDISC])
+ pmtudisc =
+ rta_getattr_u8(iptuninfo[IFLA_IPTUN_PMTUDISC]);
+
+ if (iptuninfo[IFLA_IPTUN_FLAGS])
+ iflags = rta_getattr_u16(iptuninfo[IFLA_IPTUN_FLAGS]);
+
+ if (iptuninfo[IFLA_IPTUN_LINK])
+ link = rta_getattr_u32(iptuninfo[IFLA_IPTUN_LINK]);
+
+ if (iptuninfo[IFLA_IPTUN_6RD_PREFIX])
+ memcpy(&ip6rdprefix,
+ RTA_DATA(iptuninfo[IFLA_IPTUN_6RD_PREFIX]),
+ sizeof(laddr));
+
+ if (iptuninfo[IFLA_IPTUN_6RD_PREFIXLEN])
+ ip6rdprefixlen =
+ rta_getattr_u16(iptuninfo[IFLA_IPTUN_6RD_PREFIXLEN]);
+
+ if (iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIX])
+ ip6rdrelayprefix =
+ rta_getattr_u32(iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIX]);
+
+ if (iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIXLEN])
+ ip6rdrelayprefixlen =
+ rta_getattr_u16(iptuninfo[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]);
+ }
+
+ while (argc > 0) {
+ if (strcmp(*argv, "remote") == 0) {
+ NEXT_ARG();
+ if (strcmp(*argv, "any"))
+ raddr = get_addr32(*argv);
+ else
+ raddr = 0;
+ } else if (strcmp(*argv, "local") == 0) {
+ NEXT_ARG();
+ if (strcmp(*argv, "any"))
+ laddr = get_addr32(*argv);
+ else
+ laddr = 0;
+ } else if (matches(*argv, "dev") == 0) {
+ NEXT_ARG();
+ link = if_nametoindex(*argv);
+ if (link == 0)
+ invarg("\"dev\" is invalid", *argv);
+ } else if (strcmp(*argv, "ttl") == 0 ||
+ strcmp(*argv, "hoplimit") == 0) {
+ NEXT_ARG();
+ if (strcmp(*argv, "inherit") != 0) {
+ if (get_u8(&ttl, *argv, 0))
+ invarg("invalid TTL\n", *argv);
+ } else
+ ttl = 0;
+ } else if (strcmp(*argv, "tos") == 0 ||
+ strcmp(*argv, "tclass") == 0 ||
+ matches(*argv, "dsfield") == 0) {
+ __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 (strcmp(*argv, "nopmtudisc") == 0) {
+ pmtudisc = 0;
+ } else if (strcmp(*argv, "pmtudisc") == 0) {
+ pmtudisc = 1;
+ } else if (strcmp(lu->id, "sit") == 0 &&
+ strcmp(*argv, "isatap") == 0) {
+ iflags |= SIT_ISATAP;
+ } else if (strcmp(*argv, "6rd-prefix") == 0) {
+ inet_prefix prefix;
+ NEXT_ARG();
+ if (get_prefix(&prefix, *argv, AF_INET6))
+ invarg("invalid 6rd_prefix\n", *argv);
+ memcpy(&ip6rdprefix, prefix.data, 16);
+ ip6rdprefixlen = prefix.bitlen;
+ } else if (strcmp(*argv, "6rd-relay_prefix") == 0) {
+ inet_prefix prefix;
+ NEXT_ARG();
+ if (get_prefix(&prefix, *argv, AF_INET))
+ invarg("invalid 6rd-relay_prefix\n", *argv);
+ memcpy(&ip6rdrelayprefix, prefix.data, 4);
+ ip6rdrelayprefixlen = prefix.bitlen;
+ } else if (strcmp(*argv, "6rd-reset") == 0) {
+ inet_prefix prefix;
+ get_prefix(&prefix, "2002::", AF_INET6);
+ memcpy(&ip6rdprefix, prefix.data, 16);
+ ip6rdprefixlen = 16;
+ ip6rdrelayprefix = 0;
+ ip6rdrelayprefixlen = 0;
+ } else
+ usage(strcmp(lu->id, "sit") == 0);
+ argc--, argv++;
+ }
+
+ if (ttl && pmtudisc == 0) {
+ fprintf(stderr, "ttl != 0 and noptmudisc are incompatible\n");
+ exit(-1);
+ }
+
+ addattr32(n, 1024, IFLA_IPTUN_LINK, link);
+ addattr32(n, 1024, IFLA_IPTUN_LOCAL, laddr);
+ addattr32(n, 1024, IFLA_IPTUN_REMOTE, raddr);
+ addattr8(n, 1024, IFLA_IPTUN_TTL, ttl);
+ addattr8(n, 1024, IFLA_IPTUN_TOS, tos);
+ addattr8(n, 1024, IFLA_IPTUN_PMTUDISC, pmtudisc);
+ if (strcmp(lu->id, "sit") == 0) {
+ addattr16(n, 1024, IFLA_IPTUN_FLAGS, iflags);
+ if (ip6rdprefixlen) {
+ addattr_l(n, 1024, IFLA_IPTUN_6RD_PREFIX,
+ &ip6rdprefix, sizeof(ip6rdprefix));
+ addattr16(n, 1024, IFLA_IPTUN_6RD_PREFIXLEN,
+ ip6rdprefixlen);
+ addattr32(n, 1024, IFLA_IPTUN_6RD_RELAY_PREFIX,
+ ip6rdrelayprefix);
+ addattr16(n, 1024, IFLA_IPTUN_6RD_RELAY_PREFIXLEN,
+ ip6rdrelayprefixlen);
+ }
+ }
+
+ return 0;
+}
+
+static void iptunnel_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_IPTUN_REMOTE]) {
+ unsigned addr = rta_getattr_u32(tb[IFLA_IPTUN_REMOTE]);
+
+ if (addr)
+ remote = format_host(AF_INET, 4, &addr, s1, sizeof(s1));
+ }
+
+ fprintf(f, "remote %s ", remote);
+
+ if (tb[IFLA_IPTUN_LOCAL]) {
+ unsigned addr = rta_getattr_u32(tb[IFLA_IPTUN_LOCAL]);
+
+ if (addr)
+ local = format_host(AF_INET, 4, &addr, s1, sizeof(s1));
+ }
+
+ fprintf(f, "local %s ", local);
+
+ if (tb[IFLA_IPTUN_LINK] && rta_getattr_u32(tb[IFLA_IPTUN_LINK])) {
+ unsigned link = rta_getattr_u32(tb[IFLA_IPTUN_LINK]);
+ const char *n = if_indextoname(link, s2);
+
+ if (n)
+ fprintf(f, "dev %s ", n);
+ else
+ fprintf(f, "dev %u ", link);
+ }
+
+ if (tb[IFLA_IPTUN_TTL] && rta_getattr_u8(tb[IFLA_IPTUN_TTL]))
+ fprintf(f, "ttl %d ", rta_getattr_u8(tb[IFLA_IPTUN_TTL]));
+ else
+ fprintf(f, "ttl inherit ");
+
+ if (tb[IFLA_IPTUN_TOS] && rta_getattr_u8(tb[IFLA_IPTUN_TOS])) {
+ int tos = rta_getattr_u8(tb[IFLA_IPTUN_TOS]);
+
+ fputs("tos ", f);
+ if (tos == 1)
+ fputs("inherit ", f);
+ else
+ fprintf(f, "0x%x ", tos);
+ }
+
+ if (tb[IFLA_IPTUN_PMTUDISC] && rta_getattr_u8(tb[IFLA_IPTUN_PMTUDISC]))
+ fprintf(f, "pmtudisc ");
+ else
+ fprintf(f, "nopmtudisc ");
+
+ if (tb[IFLA_IPTUN_FLAGS]) {
+ __u16 iflags = rta_getattr_u16(tb[IFLA_IPTUN_FLAGS]);
+
+ if (iflags & SIT_ISATAP)
+ fprintf(f, "isatap ");
+ }
+
+ if (tb[IFLA_IPTUN_6RD_PREFIXLEN] &&
+ *(__u16 *)RTA_DATA(tb[IFLA_IPTUN_6RD_PREFIXLEN])) {
+ __u16 prefixlen = rta_getattr_u16(tb[IFLA_IPTUN_6RD_PREFIXLEN]);
+ __u16 relayprefixlen =
+ rta_getattr_u16(tb[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]);
+ __u32 relayprefix =
+ rta_getattr_u32(tb[IFLA_IPTUN_6RD_RELAY_PREFIX]);
+
+ printf("6rd-prefix %s/%u ",
+ inet_ntop(AF_INET6, RTA_DATA(tb[IFLA_IPTUN_6RD_PREFIX]),
+ s1, sizeof(s1)),
+ prefixlen);
+ if (relayprefix) {
+ printf("6rd-relay_prefix %s/%u ",
+ format_host(AF_INET, 4, &relayprefix, s1,
+ sizeof(s1)),
+ relayprefixlen);
+ }
+ }
+}
+
+struct link_util ipip_link_util = {
+ .id = "ipip",
+ .maxattr = IFLA_IPTUN_MAX,
+ .parse_opt = iptunnel_parse_opt,
+ .print_opt = iptunnel_print_opt,
+};
+
+struct link_util sit_link_util = {
+ .id = "sit",
+ .maxattr = IFLA_IPTUN_MAX,
+ .parse_opt = iptunnel_parse_opt,
+ .print_opt = iptunnel_print_opt,
+};
projects / thirdparty / iproute2.git / commitdiff
