@@ -2,6 +2,7 @@
#define _IF_TUNNEL_H_
#include <linux/types.h>
+#include <linux/ip.h>
#define SIOCGETTUNNEL (SIOCDEVPRIVATE + 0)
#define SIOCADDTUNNEL (SIOCDEVPRIVATE + 1)
@@ -47,4 +48,26 @@ struct ip_tunnel_prl {
/* PRL flags */
#define PRL_DEFAULT 0x0001
+enum
+{
+ IFLA_GRE_UNSPEC,
+ IFLA_GRE_LINK,
+ IFLA_GRE_IFLAGS,
+ IFLA_GRE_OFLAGS,
+ IFLA_GRE_IKEY,
+ IFLA_GRE_OKEY,
+ IFLA_GRE_LOCAL,
+ IFLA_GRE_REMOTE,
+ IFLA_GRE_TTL,
+ IFLA_GRE_TOS,
+ IFLA_GRE_PMTUDISC,
+ IFLA_GRE_TYPE,
+ __IFLA_GRE_MAX,
+};
+
+#define IFLA_GRE_MAX (__IFLA_GRE_MAX - 1)
+
+#define GRE_TYPE_TUN 0x00000000
+#define GRE_TYPE_TAP 0x00000001
+
#endif /* _IF_TUNNEL_H_ */
@@ -2,7 +2,7 @@ IPOBJ=ip.o ipaddress.o ipaddrlabel.o iproute.o iprule.o \
rtm_map.o iptunnel.o ip6tunnel.o tunnel.o ipneigh.o ipntable.o iplink.o \
ipmaddr.o ipmonitor.o ipmroute.o ipprefix.o \
ipxfrm.o xfrm_state.o xfrm_policy.o xfrm_monitor.o \
- iplink_vlan.o link_veth.o
+ iplink_vlan.o link_veth.o link_gre.o
RTMONOBJ=rtmon.o
@@ -310,32 +310,6 @@ static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
argv += ret;
ll_init_map(&rth);
- if (type) {
- struct rtattr *linkinfo = NLMSG_TAIL(&req.n);
- addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0);
- addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type,
- strlen(type));
-
- lu = get_link_kind(type);
- if (lu && argc) {
- struct rtattr * data = NLMSG_TAIL(&req.n);
- addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0);
-
- if (lu->parse_opt &&
- lu->parse_opt(lu, argc, argv, &req.n))
- return -1;
-
- data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data;
- } else if (argc) {
- if (matches(*argv, "help") == 0)
- usage();
- fprintf(stderr, "Garbage instead of arguments \"%s ...\". "
- "Try \"ip link help\".\n", *argv);
- return -1;
- }
- linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo;
- }
-
if (!(flags & NLM_F_CREATE)) {
if (!dev) {
fprintf(stderr, "Not enough information: \"dev\" "
@@ -366,6 +340,33 @@ static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
}
}
+ if (type) {
+ struct rtattr *linkinfo = NLMSG_TAIL(&req.n);
+
+ addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0);
+ addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, type,
+ strlen(type));
+
+ lu = get_link_kind(type);
+ if (lu && argc) {
+ struct rtattr * data = NLMSG_TAIL(&req.n);
+ addattr_l(&req.n, sizeof(req), IFLA_INFO_DATA, NULL, 0);
+
+ if (lu->parse_opt &&
+ lu->parse_opt(lu, argc, argv, &req.n))
+ return -1;
+
+ data->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)data;
+ } else if (argc) {
+ if (matches(*argv, "help") == 0)
+ usage();
+ fprintf(stderr, "Garbage instead of arguments \"%s ...\". "
+ "Try \"ip link help\".\n", *argv);
+ return -1;
+ }
+ linkinfo->rta_len = (void *)NLMSG_TAIL(&req.n) - (void *)linkinfo;
+ }
+
if (name) {
len = strlen(name) + 1;
if (len == 1)
new file mode 100644
@@ -0,0 +1,367 @@
+/*
+ * link_gre.c gre 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>
+ *
+ */
+
+#include <string.h>
+#include <net/if.h>
+#include <linux/if_tunnel.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+#include "tunnel.h"
+
+static void usage(void) __attribute__((noreturn));
+static void usage(void)
+{
+ fprintf(stderr, "Usage: ip link { add | set | change | replace | del } NAME\n");
+ fprintf(stderr, " type { gre | gretap } [ remote ADDR ] [ local ADDR ]\n");
+ fprintf(stderr, " [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n");
+ fprintf(stderr, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\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");
+ fprintf(stderr, " KEY := { DOTTED_QUAD | NUMBER }\n");
+ exit(-1);
+}
+
+static int gre_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 *greinfo[IFLA_GRE_MAX + 1];
+ __u16 iflags = 0;
+ __u16 oflags = 0;
+ unsigned ikey = 0;
+ unsigned okey = 0;
+ unsigned saddr = 0;
+ unsigned daddr = 0;
+ unsigned link = 0;
+ __u8 pmtudisc = 1;
+ __u8 ttl = 0;
+ __u8 tos = 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, 0, 0, &req.n, NULL, NULL) < 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(greinfo, IFLA_GRE_MAX,
+ linkinfo[IFLA_INFO_DATA]);
+
+ if (greinfo[IFLA_GRE_IKEY])
+ ikey = *(__u32 *)RTA_DATA(greinfo[IFLA_GRE_IKEY]);
+
+ if (greinfo[IFLA_GRE_OKEY])
+ okey = *(__u32 *)RTA_DATA(greinfo[IFLA_GRE_OKEY]);
+
+ if (greinfo[IFLA_GRE_IFLAGS])
+ iflags = *(__u16 *)RTA_DATA(greinfo[IFLA_GRE_IFLAGS]);
+
+ if (greinfo[IFLA_GRE_OFLAGS])
+ oflags = *(__u16 *)RTA_DATA(greinfo[IFLA_GRE_OFLAGS]);
+
+ if (greinfo[IFLA_GRE_LOCAL])
+ saddr = *(__u32 *)RTA_DATA(greinfo[IFLA_GRE_LOCAL]);
+
+ if (greinfo[IFLA_GRE_REMOTE])
+ daddr = *(__u32 *)RTA_DATA(greinfo[IFLA_GRE_REMOTE]);
+
+ if (greinfo[IFLA_GRE_PMTUDISC])
+ pmtudisc = *(__u8 *)RTA_DATA(
+ greinfo[IFLA_GRE_PMTUDISC]);
+
+ if (greinfo[IFLA_GRE_TTL])
+ ttl = *(__u8 *)RTA_DATA(greinfo[IFLA_GRE_TTL]);
+
+ if (greinfo[IFLA_GRE_TOS])
+ tos = *(__u8 *)RTA_DATA(greinfo[IFLA_GRE_TOS]);
+
+ if (greinfo[IFLA_GRE_LINK])
+ link = *(__u8 *)RTA_DATA(greinfo[IFLA_GRE_LINK]);
+ }
+
+ while (argc > 0) {
+ if (!matches(*argv, "key")) {
+ unsigned uval;
+
+ NEXT_ARG();
+ iflags |= GRE_KEY;
+ oflags |= GRE_KEY;
+ if (strchr(*argv, '.'))
+ uval = get_addr32(*argv);
+ else {
+ if (get_unsigned(&uval, *argv, 0) < 0) {
+ fprintf(stderr,
+ "Invalid value for \"key\"\n");
+ exit(-1);
+ }
+ uval = htonl(uval);
+ }
+
+ ikey = okey = uval;
+ } else if (!matches(*argv, "ikey")) {
+ unsigned uval;
+
+ NEXT_ARG();
+ iflags |= GRE_KEY;
+ if (strchr(*argv, '.'))
+ uval = get_addr32(*argv);
+ else {
+ if (get_unsigned(&uval, *argv, 0)<0) {
+ fprintf(stderr, "invalid value of \"ikey\"\n");
+ exit(-1);
+ }
+ uval = htonl(uval);
+ }
+ ikey = uval;
+ } else if (!matches(*argv, "okey")) {
+ unsigned uval;
+
+ NEXT_ARG();
+ oflags |= GRE_KEY;
+ if (strchr(*argv, '.'))
+ uval = get_addr32(*argv);
+ else {
+ if (get_unsigned(&uval, *argv, 0)<0) {
+ fprintf(stderr, "invalid value of \"okey\"\n");
+ exit(-1);
+ }
+ uval = htonl(uval);
+ }
+ okey = uval;
+ } else if (!matches(*argv, "seq")) {
+ iflags |= GRE_SEQ;
+ oflags |= GRE_SEQ;
+ } else if (!matches(*argv, "iseq")) {
+ iflags |= GRE_SEQ;
+ } else if (!matches(*argv, "oseq")) {
+ oflags |= GRE_SEQ;
+ } else if (!matches(*argv, "csum")) {
+ iflags |= GRE_CSUM;
+ oflags |= GRE_CSUM;
+ } else if (!matches(*argv, "icsum")) {
+ iflags |= GRE_CSUM;
+ } else if (!matches(*argv, "ocsum")) {
+ oflags |= GRE_CSUM;
+ } else if (!matches(*argv, "nopmtudisc")) {
+ pmtudisc = 0;
+ } else if (!matches(*argv, "pmtudisc")) {
+ pmtudisc = 1;
+ } else if (!matches(*argv, "remote")) {
+ NEXT_ARG();
+ if (strcmp(*argv, "any"))
+ daddr = get_addr32(*argv);
+ } else if (!matches(*argv, "local")) {
+ NEXT_ARG();
+ if (strcmp(*argv, "any"))
+ saddr = get_addr32(*argv);
+ } else if (!matches(*argv, "dev")) {
+ NEXT_ARG();
+ link = tnl_ioctl_get_ifindex(*argv);
+ if (link == 0)
+ 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\n", *argv);
+ if (uval > 255)
+ invarg("TTL must be <= 255\n", *argv);
+ ttl = uval;
+ }
+ } else if (!matches(*argv, "tos") ||
+ !matches(*argv, "tclass") ||
+ !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
+ usage();
+ argc--; argv++;
+ }
+
+ if (!ikey && IN_MULTICAST(ntohl(daddr))) {
+ ikey = daddr;
+ iflags |= GRE_KEY;
+ }
+ if (!okey && IN_MULTICAST(ntohl(daddr))) {
+ okey = daddr;
+ oflags |= GRE_KEY;
+ }
+ if (IN_MULTICAST(ntohl(daddr)) && !saddr) {
+ fprintf(stderr, "Broadcast tunnel requires a source address.\n");
+ return -1;
+ }
+
+ addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
+ addattr32(n, 1024, IFLA_GRE_OKEY, okey);
+ addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
+ addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
+ addattr_l(n, 1024, IFLA_GRE_LOCAL, &saddr, 4);
+ addattr_l(n, 1024, IFLA_GRE_REMOTE, &daddr, 4);
+ addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
+ if (link)
+ addattr32(n, 1024, IFLA_GRE_LINK, link);
+ addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
+ addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
+
+ return 0;
+}
+
+static void gre_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";
+ unsigned iflags = 0;
+ unsigned oflags = 0;
+
+ if (!tb)
+ return;
+
+ if (tb[IFLA_GRE_REMOTE]) {
+ unsigned addr = *(__u32 *)RTA_DATA(tb[IFLA_GRE_REMOTE]);
+
+ if (addr)
+ remote = format_host(AF_INET, 4, &addr, s1, sizeof(s1));
+ }
+
+ fprintf(f, "remote %s ", remote);
+
+ if (tb[IFLA_GRE_LOCAL]) {
+ unsigned addr = *(__u32 *)RTA_DATA(tb[IFLA_GRE_LOCAL]);
+
+ if (addr)
+ local = format_host(AF_INET, 4, &addr, s1, sizeof(s1));
+ }
+
+ fprintf(f, "local %s ", local);
+
+ if (tb[IFLA_GRE_LINK] && *(__u32 *)RTA_DATA(tb[IFLA_GRE_LINK])) {
+ unsigned link = *(__u32 *)RTA_DATA(tb[IFLA_GRE_LINK]);
+ char *n = tnl_ioctl_get_ifname(link);
+
+ if (n)
+ fprintf(f, "dev %s ", n);
+ else
+ fprintf(f, "dev %u ", link);
+ }
+
+ if (tb[IFLA_GRE_TTL] && *(__u8 *)RTA_DATA(tb[IFLA_GRE_TTL]))
+ fprintf(f, "ttl %d ", *(__u8 *)RTA_DATA(tb[IFLA_GRE_TTL]));
+ else
+ fprintf(f, "ttl inherit ");
+
+ if (tb[IFLA_GRE_TOS] && *(__u8 *)RTA_DATA(tb[IFLA_GRE_TOS])) {
+ int tos = *(__u8 *)RTA_DATA(tb[IFLA_GRE_TOS]);
+
+ fputs("tos ", f);
+ if (tos == 1)
+ fputs("inherit ", f);
+ else
+ fprintf(f, "0x%x ", tos);
+ }
+
+ if (tb[IFLA_GRE_PMTUDISC] &&
+ !*(__u8 *)RTA_DATA(tb[IFLA_GRE_PMTUDISC]))
+ fputs("nopmtudisc ", f);
+
+ if (tb[IFLA_GRE_IFLAGS])
+ iflags = *(__u16 *)RTA_DATA(tb[IFLA_GRE_IFLAGS]);
+
+ if (tb[IFLA_GRE_OFLAGS])
+ oflags = *(__u16 *)RTA_DATA(tb[IFLA_GRE_OFLAGS]);
+
+ if (iflags & GRE_KEY && tb[IFLA_GRE_IKEY] &&
+ *(__u32 *)RTA_DATA(tb[IFLA_GRE_IKEY])) {
+ inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
+ fprintf(f, "ikey %s ", s2);
+ }
+
+ if (oflags & GRE_KEY && tb[IFLA_GRE_OKEY] &&
+ *(__u32 *)RTA_DATA(tb[IFLA_GRE_OKEY])) {
+ inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
+ fprintf(f, "ikey %s ", s2);
+ }
+
+ if (iflags & GRE_SEQ)
+ fputs("iseq ", f);
+ if (oflags & GRE_SEQ)
+ fputs("oseq ", f);
+ if (iflags & GRE_CSUM)
+ fputs("icsum ", f);
+ if (oflags & GRE_CSUM)
+ fputs("ocsum ", f);
+}
+
+struct link_util gre_link_util = {
+ .id = "gre",
+ .maxattr = IFLA_GRE_MAX,
+ .parse_opt = gre_parse_opt,
+ .print_opt = gre_print_opt,
+};
+
+struct link_util gretap_link_util = {
+ .id = "gretap",
+ .maxattr = IFLA_GRE_MAX,
+ .parse_opt = gre_parse_opt,
+ .print_opt = gre_print_opt,
+};