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Date: Wed, 27 Jun 2012 18:01:57 -0700
From: Saurabh <saurabh.mohan@...tta.com>
To: netdev@...r.kernel.org
Subject: [PATCH 02/02] iproute2: VTI support for ip link command.
Support for VTI via rt netlink.
Signed-off-by: Saurabh Mohan <saurabh.mohan@...tta.com>
---
diff --git a/ip/Makefile b/ip/Makefile
index e029ea1..6a518f8 100644
--- a/ip/Makefile
+++ b/ip/Makefile
@@ -3,7 +3,7 @@ IPOBJ=ip.o ipaddress.o ipaddrlabel.o iproute.o iprule.o ipnetns.o \
ipmaddr.o ipmonitor.o ipmroute.o ipprefix.o iptuntap.o \
ipxfrm.o xfrm_state.o xfrm_policy.o xfrm_monitor.o \
iplink_vlan.o link_veth.o link_gre.o iplink_can.o \
- iplink_macvlan.o iplink_macvtap.o ipl2tp.o
+ iplink_macvlan.o iplink_macvtap.o ipl2tp.o link_vti.o
RTMONOBJ=rtmon.o
diff --git a/ip/link_vti.c b/ip/link_vti.c
new file mode 100644
index 0000000..385f435
--- /dev/null
+++ b/ip/link_vti.c
@@ -0,0 +1,245 @@
+/*
+ * 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@...dor.apana.org.au>
+ * Saurabh Mohan <saurabh.mohan@...tta.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 usage(void) __attribute__((noreturn));
+static void usage(void)
+{
+ fprintf(stderr, "Usage: ip link { add | set | change | replace | del } NAME\n");
+ fprintf(stderr, " type { vti } [ remote ADDR ] [ local ADDR ]\n");
+ fprintf(stderr, " [ [i|o]key KEY ]\n");
+ fprintf(stderr, " [ dev PHYS_DEV ]\n");
+ fprintf(stderr, "\n");
+ fprintf(stderr, "Where: NAME := STRING\n");
+ fprintf(stderr, " ADDR := { IP_ADDRESS }\n");
+ fprintf(stderr, " KEY := { DOTTED_QUAD | NUMBER }\n");
+ 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, 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(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\"\n");
+ 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 of \"ikey\"\n");
+ 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 of \"okey\"\n");
+ exit(-1);
+ }
+ uval = htonl(uval);
+ }
+ okey = uval;
+ } else if (!matches(*argv, "remote")) {
+ NEXT_ARG();
+ if (!strcmp(*argv, "any")) {
+ fprintf(stderr, "invalid value of \"remote\"\n");
+ exit(-1);
+ } else {
+ daddr = get_addr32(*argv);
+ }
+ } else if (!matches(*argv, "local")) {
+ NEXT_ARG();
+ if (!strcmp(*argv, "any")) {
+ fprintf(stderr, "invalid value of \"local\"\n");
+ exit(-1);
+ } else {
+ saddr = get_addr32(*argv);
+ }
+ } else if (!matches(*argv, "dev")) {
+ NEXT_ARG();
+ link = if_nametoindex(*argv);
+ if (link == 0)
+ 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);
+ }
+}
+
+struct link_util vti_link_util = {
+ .id = "vti",
+ .maxattr = IFLA_VTI_MAX,
+ .parse_opt = vti_parse_opt,
+ .print_opt = vti_print_opt,
+};
--
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