diff options
| author |   Szymon Sliwa <szs@semihalf.com> | 2018-05-09 14:28:08 +0200 |
|---|---|---|
| committer |   Damjan Marion <dmarion.lists@gmail.com> | 2018-05-10 14:11:13 +0000 |
| commit | 65a27279af2bead3be65ab0cb2a0bc2b79e00f42 (patch) | |
| tree | 08b0ea77e6d11500faffa539b0797473d2eabb36 /src/vnet/ipsec | |
| parent | 7cb7bb3fa1eca927cd33d8b434ce0eac1d57a987 (diff) | |
Change the way IP header pointer is calculated in esp_decrypt nodes
The pointer to IP header was derived from l3_hdr_offset,
which would be ok, if l3_hdr_offset was valid. But it does not
have to be, so it was a bad solution. Now the previous nodes
mark whether it is a IPv6 or IPv4 packet tyle, and in esp_decrypt
we count get ip header pointer by substracting the size
of the ip header from the pointer to esp header (which lies
in front of the ip header).
Change-Id: I6d425b90931053711e8ce9126811b77ae6002a16
Signed-off-by: Szymon Sliwa <szs@semihalf.com>
Diffstat (limited to 'src/vnet/ipsec')
| -rw-r--r-- | src/vnet/ipsec/esp_decrypt.c | 10 | ||||
| -rw-r--r-- | src/vnet/ipsec/ipsec_input.c | 4 |
2 files changed, 11 insertions, 3 deletions
diff --git a/src/vnet/ipsec/esp_decrypt.c b/src/vnet/ipsec/esp_decrypt.c index 62b12dbbdf6..a0eeed464da 100644 --- a/src/vnet/ipsec/esp_decrypt.c +++ b/src/vnet/ipsec/esp_decrypt.c @@ -269,9 +269,13 @@ esp_decrypt_node_fn (vlib_main_t * vm, { tunnel_mode = 0; - ih4 = - (ip4_header_t *) ((u8 *) i_b0->data + - vnet_buffer (i_b0)->l3_hdr_offset); + if (i_b0->flags & VNET_BUFFER_F_IS_IP4) + ih4 = + (ip4_header_t *) ((u8 *) esp0 - sizeof (ip4_header_t)); + else + ih4 = + (ip4_header_t *) ((u8 *) esp0 - sizeof (ip6_header_t)); + if (PREDICT_TRUE ((ih4->ip_version_and_header_length & 0xF0) != 0x40)) { diff --git a/src/vnet/ipsec/ipsec_input.c b/src/vnet/ipsec/ipsec_input.c index 08269d0244e..d61755597ba 100644 --- a/src/vnet/ipsec/ipsec_input.c +++ b/src/vnet/ipsec/ipsec_input.c @@ -207,6 +207,8 @@ ipsec_input_ip4_node_fn (vlib_main_t * vm, n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); + b0->flags |= VNET_BUFFER_F_IS_IP4; + b0->flags &= ~VNET_BUFFER_F_IS_IP6; c0 = vnet_feature_next_with_data (vnet_buffer (b0)->sw_if_index [VLIB_RX], &next0, b0, @@ -389,6 +391,8 @@ VLIB_NODE_FUNCTION_MULTIARCH (ipsec_input_ip4_node, ipsec_input_ip4_node_fn) n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); + b0->flags |= VNET_BUFFER_F_IS_IP6; + b0->flags &= ~VNET_BUFFER_F_IS_IP4; c0 = vnet_feature_next_with_data (vnet_buffer (b0)->sw_if_index [VLIB_RX], &next0, b0, |