diff options
| author |   Patrick McHardy <kaber@trash.net> | 2006-01-13 14:34:36 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2006-01-13 14:34:36 -0800 |
| commit | ee51b1b6cece4dad408feeb0c3c9adb9cbd9f7d9 (patch) | |
| tree | bf7f1c6bb864f287d720b167e565ee3799d957b4 /net/ipv4/xfrm4_state.c | |
| parent | [NET]: Clean up comments for sk_chk_filter() (diff) | |
| download | linux-dev-ee51b1b6cece4dad408feeb0c3c9adb9cbd9f7d9.tar.xz linux-dev-ee51b1b6cece4dad408feeb0c3c9adb9cbd9f7d9.zip | |
[XFRM]: IPsec tunnel wildcard address support
When the source address of a tunnel is given as 0.0.0.0 do a routing lookup
to get the real source address for the destination and fill that into the
acquire message. This allows to specify policies like this:
spdadd 172.16.128.13/32 172.16.0.0/20 any -P out ipsec
esp/tunnel/0.0.0.0-x.x.x.x/require;
spdadd 172.16.0.0/20 172.16.128.13/32 any -P in ipsec
esp/tunnel/x.x.x.x-0.0.0.0/require;
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/xfrm4_state.c')
| -rw-r--r-- | net/ipv4/xfrm4_state.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c index d23e07fc81fa..dbabf81a9b7b 100644 --- a/net/ipv4/xfrm4_state.c +++ b/net/ipv4/xfrm4_state.c @@ -42,6 +42,21 @@ __xfrm4_init_tempsel(struct xfrm_state *x, struct flowi *fl, x->props.saddr = tmpl->saddr; if (x->props.saddr.a4 == 0) x->props.saddr.a4 = saddr->a4; + if (tmpl->mode && x->props.saddr.a4 == 0) { + struct rtable *rt; + struct flowi fl_tunnel = { + .nl_u = { + .ip4_u = { + .daddr = x->id.daddr.a4, + } + } + }; + if (!xfrm_dst_lookup((struct xfrm_dst **)&rt, + &fl_tunnel, AF_INET)) { + x->props.saddr.a4 = rt->rt_src; + dst_release(&rt->u.dst); + } + } x->props.mode = tmpl->mode; x->props.reqid = tmpl->reqid; x->props.family = AF_INET; |