--- /dev/null
+/*
+ * 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)
+{
+ __u16 iflags = 0;
+ __u16 oflags = 0;
+ unsigned ikey = 0;
+ unsigned okey = 0;
+ unsigned saddr = 0;
+ unsigned daddr = 0;
+
+ 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")) {
+ __u8 val = 0;
+
+ addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &val, 1);
+ } else if (!matches(*argv, "pmtudisc")) {
+ __u8 val = 1;
+
+ addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &val, 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")) {
+ unsigned link;
+
+ NEXT_ARG();
+ link = tnl_ioctl_get_ifindex(*argv);
+ if (link == 0)
+ exit(-1);
+
+ addattr32(n, 1024, IFLA_GRE_LINK, link);
+ } else if (!matches(*argv, "ttl") ||
+ !matches(*argv, "hoplimit")) {
+ unsigned uval;
+ __u8 ttl;
+
+ 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;
+ addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
+ }
+ } else if (!matches(*argv, "tos") ||
+ !matches(*argv, "tclass") ||
+ !matches(*argv, "dsfield")) {
+ __u32 uval;
+ __u8 tos;
+
+ NEXT_ARG();
+ if (strcmp(*argv, "inherit") != 0) {
+ if (rtnl_dsfield_a2n(&uval, *argv))
+ invarg("bad TOS value", *argv);
+ tos = uval;
+ } else
+ tos = 1;
+ addattr_l(n, 1024, IFLA_GRE_TOS, &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);
+
+ 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,
+};
projects / thirdparty / iproute2.git / commitdiff
