diff options
| -rw-r--r-- | include/net/xfrm.h | 23 | ||||
| -rw-r--r-- | net/ipv4/xfrm4_mode_tunnel.c | 2 | ||||
| -rw-r--r-- | net/ipv4/xfrm4_output.c | 2 | ||||
| -rw-r--r-- | net/ipv6/xfrm6_mode_tunnel.c | 2 | ||||
| -rw-r--r-- | net/ipv6/xfrm6_output.c | 2 | ||||
| -rw-r--r-- | net/key/af_key.c | 2 | ||||
| -rw-r--r-- | net/xfrm/xfrm_input.c | 22 | ||||
| -rw-r--r-- | net/xfrm/xfrm_output.c | 18 | ||||
| -rw-r--r-- | net/xfrm/xfrm_state.c | 54 | ||||
| -rw-r--r-- | net/xfrm/xfrm_user.c | 7 |
10 files changed, 113 insertions, 21 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 619c53b..4e6f956 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -204,6 +204,7 @@ struct xfrm_state * transformer. */ const struct xfrm_type *type; struct xfrm_mode *inner_mode; + struct xfrm_mode *inner_mode_iaf; struct xfrm_mode *outer_mode; /* Security context */ @@ -387,6 +388,27 @@ enum { extern int xfrm_register_mode(struct xfrm_mode *mode, int family); extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); +static inline int xfrm_af2proto(unsigned int family) +{ + switch(family) { + case AF_INET: + return IPPROTO_IPIP; + case AF_INET6: + return IPPROTO_IPV6; + default: + return 0; + } +} + +static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) +{ + if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || + (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) + return x->inner_mode; + else + return x->inner_mode_iaf; +} + struct xfrm_tmpl { /* id in template is interpreted as: @@ -1253,6 +1275,7 @@ extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); extern int xfrm_output_resume(struct sk_buff *skb, int err); extern int xfrm_output(struct sk_buff *skb); +extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); extern int xfrm4_extract_header(struct sk_buff *skb); extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c index 8dee617..584e6d7 100644 --- a/net/ipv4/xfrm4_mode_tunnel.c +++ b/net/ipv4/xfrm4_mode_tunnel.c @@ -41,7 +41,7 @@ static int xfrm4_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb) top_iph->ihl = 5; top_iph->version = 4; - top_iph->protocol = x->inner_mode->afinfo->proto; + top_iph->protocol = xfrm_af2proto(skb->dst->ops->family); /* DS disclosed */ top_iph->tos = INET_ECN_encapsulate(XFRM_MODE_SKB_CB(skb)->tos, diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c index d5a58a8..8c3180a 100644 --- a/net/ipv4/xfrm4_output.c +++ b/net/ipv4/xfrm4_output.c @@ -56,7 +56,7 @@ int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb) { int err; - err = x->inner_mode->afinfo->extract_output(x, skb); + err = xfrm_inner_extract_output(x, skb); if (err) return err; diff --git a/net/ipv6/xfrm6_mode_tunnel.c b/net/ipv6/xfrm6_mode_tunnel.c index 0c742fa..e20529b 100644 --- a/net/ipv6/xfrm6_mode_tunnel.c +++ b/net/ipv6/xfrm6_mode_tunnel.c @@ -45,7 +45,7 @@ static int xfrm6_mode_tunnel_output(struct xfrm_state *x, struct sk_buff *skb) memcpy(top_iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl, sizeof(top_iph->flow_lbl)); - top_iph->nexthdr = x->inner_mode->afinfo->proto; + top_iph->nexthdr = xfrm_af2proto(skb->dst->ops->family); dsfield = XFRM_MODE_SKB_CB(skb)->tos; dsfield = INET_ECN_encapsulate(dsfield, dsfield); diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c index 79ccfb0..0af823cf 100644 --- a/net/ipv6/xfrm6_output.c +++ b/net/ipv6/xfrm6_output.c @@ -62,7 +62,7 @@ int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb) { int err; - err = x->inner_mode->afinfo->extract_output(x, skb); + err = xfrm_inner_extract_output(x, skb); if (err) return err; diff --git a/net/key/af_key.c b/net/key/af_key.c index 8b5f486..e9ef9af 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -1219,7 +1219,7 @@ static struct xfrm_state * pfkey_msg2xfrm_state(struct sadb_msg *hdr, x->sel.prefixlen_s = addr->sadb_address_prefixlen; } - if (!x->sel.family) + if (x->props.mode == XFRM_MODE_TRANSPORT) x->sel.family = x->props.family; if (ext_hdrs[SADB_X_EXT_NAT_T_TYPE-1]) { diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c index 62188c6..7527940 100644 --- a/net/xfrm/xfrm_input.c +++ b/net/xfrm/xfrm_input.c @@ -84,14 +84,21 @@ int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq) int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb) { + struct xfrm_mode *inner_mode = x->inner_mode; int err; err = x->outer_mode->afinfo->extract_input(x, skb); if (err) return err; - skb->protocol = x->inner_mode->afinfo->eth_proto; - return x->inner_mode->input2(x, skb); + if (x->sel.family == AF_UNSPEC) { + inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol); + if (inner_mode == NULL) + return -EAFNOSUPPORT; + } + + skb->protocol = inner_mode->afinfo->eth_proto; + return inner_mode->input2(x, skb); } EXPORT_SYMBOL(xfrm_prepare_input); @@ -101,6 +108,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type) __be32 seq; struct xfrm_state *x; xfrm_address_t *daddr; + struct xfrm_mode *inner_mode; unsigned int family; int decaps = 0; int async = 0; @@ -207,7 +215,15 @@ resume: XFRM_MODE_SKB_CB(skb)->protocol = nexthdr; - if (x->inner_mode->input(x, skb)) { + inner_mode = x->inner_mode; + + if (x->sel.family == AF_UNSPEC) { + inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol); + if (inner_mode == NULL) + goto drop; + } + + if (inner_mode->input(x, skb)) { XFRM_INC_STATS(LINUX_MIB_XFRMINSTATEMODEERROR); goto drop; } diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c index 569d377..2519129 100644 --- a/net/xfrm/xfrm_output.c +++ b/net/xfrm/xfrm_output.c @@ -124,7 +124,7 @@ int xfrm_output_resume(struct sk_buff *skb, int err) if (!x) return dst_output(skb); - err = nf_hook(x->inner_mode->afinfo->family, + err = nf_hook(skb->dst->ops->family, NF_INET_POST_ROUTING, skb, NULL, skb->dst->dev, xfrm_output2); if (unlikely(err != 1)) @@ -193,4 +193,20 @@ int xfrm_output(struct sk_buff *skb) return xfrm_output2(skb); } + +int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb) +{ + struct xfrm_mode *inner_mode; + if (x->sel.family == AF_UNSPEC) + inner_mode = xfrm_ip2inner_mode(x, + xfrm_af2proto(skb->dst->ops->family)); + else + inner_mode = x->inner_mode; + + if (inner_mode == NULL) + return -EAFNOSUPPORT; + return inner_mode->afinfo->extract_output(x, skb); +} + EXPORT_SYMBOL_GPL(xfrm_output); +EXPORT_SYMBOL_GPL(xfrm_inner_extract_output); diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index 7ba65e8..58f1f93 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -388,6 +388,8 @@ static void xfrm_state_gc_destroy(struct xfrm_state *x) kfree(x->coaddr); if (x->inner_mode) xfrm_put_mode(x->inner_mode); + if (x->inner_mode_iaf) + xfrm_put_mode(x->inner_mode_iaf); if (x->outer_mode) xfrm_put_mode(x->outer_mode); if (x->type) { @@ -523,6 +525,8 @@ struct xfrm_state *xfrm_state_alloc(void) x->lft.hard_packet_limit = XFRM_INF; x->replay_maxage = 0; x->replay_maxdiff = 0; + x->inner_mode = NULL; + x->inner_mode_iaf = NULL; spin_lock_init(&x->lock); } return x; @@ -796,7 +800,7 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, selector. */ if (x->km.state == XFRM_STATE_VALID) { - if (!xfrm_selector_match(&x->sel, fl, x->sel.family) || + if ((x->sel.family && !xfrm_selector_match(&x->sel, fl, x->sel.family)) || !security_xfrm_state_pol_flow_match(x, pol, fl)) continue; if (!best || @@ -1944,6 +1948,7 @@ int xfrm_state_mtu(struct xfrm_state *x, int mtu) int xfrm_init_state(struct xfrm_state *x) { struct xfrm_state_afinfo *afinfo; + struct xfrm_mode *inner_mode; int family = x->props.family; int err; @@ -1962,13 +1967,48 @@ int xfrm_init_state(struct xfrm_state *x) goto error; err = -EPROTONOSUPPORT; - x->inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); - if (x->inner_mode == NULL) - goto error; - if (!(x->inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && - family != x->sel.family) - goto error; + if (x->sel.family != AF_UNSPEC) { + inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); + if (inner_mode == NULL) + goto error; + + if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && + family != x->sel.family) { + xfrm_put_mode(inner_mode); + goto error; + } + + x->inner_mode = inner_mode; + } else { + struct xfrm_mode *inner_mode_iaf; + + inner_mode = xfrm_get_mode(x->props.mode, AF_INET); + if (inner_mode == NULL) + goto error; + + if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { + xfrm_put_mode(inner_mode); + goto error; + } + + inner_mode_iaf = xfrm_get_mode(x->props.mode, AF_INET6); + if (inner_mode_iaf == NULL) + goto error; + + if (!(inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)) { + xfrm_put_mode(inner_mode_iaf); + goto error; + } + + if (x->props.family == AF_INET) { + x->inner_mode = inner_mode; + x->inner_mode_iaf = inner_mode_iaf; + } else { + x->inner_mode = inner_mode_iaf; + x->inner_mode_iaf = inner_mode; + } + } x->type = xfrm_get_type(x->id.proto, family); if (x->type == NULL) diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index f971ca5..5d96f27 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -288,12 +288,9 @@ static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info * memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); x->props.flags = p->flags; - /* - * Set inner address family if the KM left it as zero. - * See comment in validate_tmpl. - */ - if (!x->sel.family) + if (x->props.mode == XFRM_MODE_TRANSPORT) x->sel.family = p->family; + } /* |
