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Date: Tue, 1 May 2012 15:25:22 +0100
From: James Chapman <jchapman@...alix.com>
To: netdev@...r.kernel.org
Cc: Chris Elston <celston@...alix.com>
Subject: [PATCH 1/2] iproute2: allow IPv6 addresses for l2tp local and remote parameters
From: Chris Elston <celston@...alix.com>
Adds support for parsing IPv6 addresses to the parameters local and
remote in the l2tp commands. Requires netlink attributes L2TP_ATTR_IP6_SADDR
and L2TP_ATTR_IP6_DADDR, added in a required kernel patch already submitted
to netdev.
Also enables printing of IPv6 addresses returned by the L2TP_CMD_TUNNEL_GET
request.
Signed-off-by: Chris Elston <celston@...alix.com>
Signed-off-by: James Chapman <jchapman@...alix.com>
---
ip/ipl2tp.c | 59 +++++++++++++++++++++++++++++++++++++++++++++--------------
1 files changed, 45 insertions(+), 14 deletions(-)
diff --git a/ip/ipl2tp.c b/ip/ipl2tp.c
index c5683f5..a05e1a3 100644
--- a/ip/ipl2tp.c
+++ b/ip/ipl2tp.c
@@ -50,8 +50,8 @@ struct l2tp_parm {
uint8_t cookie[8];
int peer_cookie_len;
uint8_t peer_cookie[8];
- struct in_addr local_ip;
- struct in_addr peer_ip;
+ inet_prefix local_ip;
+ inet_prefix peer_ip;
uint16_t pw_type;
uint16_t mtu;
@@ -97,6 +97,8 @@ static int create_tunnel(struct l2tp_parm *p)
struct genlmsghdr g;
char buf[1024];
} req;
+ uint32_t local_attr = L2TP_ATTR_IP_SADDR;
+ uint32_t peer_attr = L2TP_ATTR_IP_DADDR;
memset(&req, 0, sizeof(req));
req.n.nlmsg_type = genl_family;
@@ -110,8 +112,14 @@ static int create_tunnel(struct l2tp_parm *p)
addattr8(&req.n, 1024, L2TP_ATTR_PROTO_VERSION, 3);
addattr16(&req.n, 1024, L2TP_ATTR_ENCAP_TYPE, p->encap);
- addattr32(&req.n, 1024, L2TP_ATTR_IP_SADDR, p->local_ip.s_addr);
- addattr32(&req.n, 1024, L2TP_ATTR_IP_DADDR, p->peer_ip.s_addr);
+ if (p->local_ip.family == AF_INET6)
+ local_attr = L2TP_ATTR_IP6_SADDR;
+ addattr_l(&req.n, 1024, local_attr, &p->local_ip.data, p->local_ip.bytelen);
+
+ if (p->peer_ip.family == AF_INET6)
+ peer_attr = L2TP_ATTR_IP6_DADDR;
+ addattr_l(&req.n, 1024, peer_attr, &p->peer_ip.data, p->peer_ip.bytelen);
+
if (p->encap == L2TP_ENCAPTYPE_UDP) {
addattr16(&req.n, 1024, L2TP_ATTR_UDP_SPORT, p->local_udp_port);
addattr16(&req.n, 1024, L2TP_ATTR_UDP_DPORT, p->peer_udp_port);
@@ -225,13 +233,14 @@ static void print_cookie(char *name, const uint8_t *cookie, int len)
static void print_tunnel(const struct l2tp_data *data)
{
const struct l2tp_parm *p = &data->config;
+ char buf[INET6_ADDRSTRLEN];
printf("Tunnel %u, encap %s\n",
p->tunnel_id,
p->encap == L2TP_ENCAPTYPE_UDP ? "UDP" :
p->encap == L2TP_ENCAPTYPE_IP ? "IP" : "??");
- printf(" From %s ", inet_ntoa(p->local_ip));
- printf("to %s\n", inet_ntoa(p->peer_ip));
+ printf(" From %s ", inet_ntop(p->local_ip.family, p->local_ip.data, buf, sizeof(buf)));
+ printf("to %s\n", inet_ntop(p->peer_ip.family, p->peer_ip.data, buf, sizeof(buf)));
printf(" Peer tunnel %u\n",
p->peer_tunnel_id);
@@ -315,10 +324,30 @@ static int get_response(struct nlmsghdr *n, void *arg)
if (attrs[L2TP_ATTR_RECV_TIMEOUT])
p->reorder_timeout = rta_getattr_u64(attrs[L2TP_ATTR_RECV_TIMEOUT]);
- if (attrs[L2TP_ATTR_IP_SADDR])
- p->local_ip.s_addr = rta_getattr_u32(attrs[L2TP_ATTR_IP_SADDR]);
- if (attrs[L2TP_ATTR_IP_DADDR])
- p->peer_ip.s_addr = rta_getattr_u32(attrs[L2TP_ATTR_IP_DADDR]);
+ if (attrs[L2TP_ATTR_IP_SADDR]) {
+ p->local_ip.family = AF_INET;
+ p->local_ip.data[0] = rta_getattr_u32(attrs[L2TP_ATTR_IP_SADDR]);
+ p->local_ip.bytelen = 4;
+ p->local_ip.bitlen = -1;
+ }
+ if (attrs[L2TP_ATTR_IP_DADDR]) {
+ p->peer_ip.family = AF_INET;
+ p->peer_ip.data[0] = rta_getattr_u32(attrs[L2TP_ATTR_IP_DADDR]);
+ p->peer_ip.bytelen = 4;
+ p->peer_ip.bitlen = -1;
+ }
+ if (attrs[L2TP_ATTR_IP6_SADDR]) {
+ p->local_ip.family = AF_INET6;
+ memcpy(&p->local_ip.data, RTA_DATA(attrs[L2TP_ATTR_IP6_SADDR]),
+ p->local_ip.bytelen = 16);
+ p->local_ip.bitlen = -1;
+ }
+ if (attrs[L2TP_ATTR_IP6_DADDR]) {
+ p->peer_ip.family = AF_INET6;
+ memcpy(&p->peer_ip.data, RTA_DATA(attrs[L2TP_ATTR_IP6_DADDR]),
+ p->peer_ip.bytelen = 16);
+ p->peer_ip.bitlen = -1;
+ }
if (attrs[L2TP_ATTR_UDP_SPORT])
p->local_udp_port = rta_getattr_u16(attrs[L2TP_ATTR_UDP_SPORT]);
if (attrs[L2TP_ATTR_UDP_DPORT])
@@ -529,10 +558,12 @@ static int parse_args(int argc, char **argv, int cmd, struct l2tp_parm *p)
p->ifname = *argv;
} else if (strcmp(*argv, "remote") == 0) {
NEXT_ARG();
- p->peer_ip.s_addr = get_addr32(*argv);
+ if (get_addr(&p->peer_ip, *argv, AF_UNSPEC))
+ invarg("invalid remote address\n", *argv);
} else if (strcmp(*argv, "local") == 0) {
NEXT_ARG();
- p->local_ip.s_addr = get_addr32(*argv);
+ if (get_addr(&p->local_ip, *argv, AF_UNSPEC))
+ invarg("invalid local address\n", *argv);
} else if ((strcmp(*argv, "tunnel_id") == 0) ||
(strcmp(*argv, "tid") == 0)) {
__u32 uval;
@@ -648,10 +679,10 @@ static int do_add(int argc, char **argv)
missarg("peer_tunnel_id");
if (p.tunnel) {
- if (p.local_ip.s_addr == 0)
+ if (p.local_ip.family == AF_UNSPEC)
missarg("local");
- if (p.peer_ip.s_addr == 0)
+ if (p.peer_ip.family == AF_UNSPEC)
missarg("remote");
if (p.encap == L2TP_ENCAPTYPE_UDP) {
--
1.7.0.4
--
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