From c82f963efe823d3cacaf1f1b7f1a35cc9628b188 Mon Sep 17 00:00:00 2001 From: Miika Komu Date: Tue, 6 Feb 2007 14:27:02 -0800 Subject: [IPSEC]: IPv6 over IPv4 IPsec tunnel This is the patch to support IPv6 over IPv4 IPsec Signed-off-by: Miika Komu Signed-off-by: Diego Beltrami Signed-off-by: Kazunori Miyazawa Signed-off-by: David S. Miller --- net/ipv6/xfrm6_policy.c | 46 +++++++++++++++++++++++++++++++--------------- 1 file changed, 31 insertions(+), 15 deletions(-) (limited to 'net/ipv6/xfrm6_policy.c') diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c index 8dffd4daae9..59480e92177 100644 --- a/net/ipv6/xfrm6_policy.c +++ b/net/ipv6/xfrm6_policy.c @@ -131,13 +131,11 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int struct dst_entry *dst, *dst_prev; struct rt6_info *rt0 = (struct rt6_info*)(*dst_p); struct rt6_info *rt = rt0; - struct in6_addr *remote = &fl->fl6_dst; - struct in6_addr *local = &fl->fl6_src; struct flowi fl_tunnel = { .nl_u = { .ip6_u = { - .saddr = *local, - .daddr = *remote + .saddr = fl->fl6_src, + .daddr = fl->fl6_dst, } } }; @@ -153,7 +151,6 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int for (i = 0; i < nx; i++) { struct dst_entry *dst1 = dst_alloc(&xfrm6_dst_ops); struct xfrm_dst *xdst; - int tunnel = 0; if (unlikely(dst1 == NULL)) { err = -ENOBUFS; @@ -177,19 +174,27 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int dst1->next = dst_prev; dst_prev = dst1; - if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) { - remote = __xfrm6_bundle_addr_remote(xfrm[i], remote); - local = __xfrm6_bundle_addr_local(xfrm[i], local); - tunnel = 1; - } + __xfrm6_bundle_len_inc(&header_len, &nfheader_len, xfrm[i]); trailer_len += xfrm[i]->props.trailer_len; - if (tunnel) { - ipv6_addr_copy(&fl_tunnel.fl6_dst, remote); - ipv6_addr_copy(&fl_tunnel.fl6_src, local); + if (xfrm[i]->props.mode == XFRM_MODE_TUNNEL) { + unsigned short encap_family = xfrm[i]->props.family; + switch(encap_family) { + case AF_INET: + fl_tunnel.fl4_dst = xfrm[i]->id.daddr.a4; + fl_tunnel.fl4_src = xfrm[i]->props.saddr.a4; + break; + case AF_INET6: + ipv6_addr_copy(&fl_tunnel.fl6_dst, (struct in6_addr*)&xfrm[i]->id.daddr.a6); + ipv6_addr_copy(&fl_tunnel.fl6_src, (struct in6_addr*)&xfrm[i]->props.saddr.a6); + break; + default: + BUG_ON(1); + } + err = xfrm_dst_lookup((struct xfrm_dst **) &rt, - &fl_tunnel, AF_INET6); + &fl_tunnel, encap_family); if (err) goto error; } else @@ -208,6 +213,7 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int i = 0; for (; dst_prev != &rt->u.dst; dst_prev = dst_prev->child) { struct xfrm_dst *x = (struct xfrm_dst*)dst_prev; + struct xfrm_state_afinfo *afinfo; dst_prev->xfrm = xfrm[i++]; dst_prev->dev = rt->u.dst.dev; @@ -224,7 +230,17 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int /* Copy neighbour for reachability confirmation */ dst_prev->neighbour = neigh_clone(rt->u.dst.neighbour); dst_prev->input = rt->u.dst.input; - dst_prev->output = xfrm6_output; + /* XXX: When IPv4 is implemented as module and can be unloaded, + * we should manage reference to xfrm4_output in afinfo->output. + * Miyazawa + */ + afinfo = xfrm_state_get_afinfo(dst_prev->xfrm->props.family); + if (!afinfo) { + dst = *dst_p; + goto error; + }; + dst_prev->output = afinfo->output; + xfrm_state_put_afinfo(afinfo); /* Sheit... I remember I did this right. Apparently, * it was magically lost, so this code needs audit */ x->u.rt6.rt6i_flags = rt0->rt6i_flags&(RTCF_BROADCAST|RTCF_MULTICAST|RTCF_LOCAL); -- cgit v1.2.3