diff options
author | 2019-10-21 18:18:00 +0200 | |
---|---|---|
committer | 2019-10-31 12:17:38 +0000 | |
commit | 80276a7101f23ddd7207983f48f85422daf2cb7f (patch) | |
tree | a22efddb5307b2925d96953cd53ef1d3a958532f /src/plugins/nat/in2out_ed.c | |
parent | 709375e7553fe24fea3b89f5eacf9081cfea0247 (diff) |
nat: respect udp checksum
Type: fix
Change-Id: I73895fa0101bd50483160c8dc6faac2c67513077
Signed-off-by: Filip Varga <fivarga@cisco.com>
(cherry picked from commit 0d75f783644a24b219ed79d9f9c17387783f67ca)
Diffstat (limited to 'src/plugins/nat/in2out_ed.c')
-rw-r--r-- | src/plugins/nat/in2out_ed.c | 120 |
1 files changed, 98 insertions, 22 deletions
diff --git a/src/plugins/nat/in2out_ed.c b/src/plugins/nat/in2out_ed.c index de00c6e7b13..c878dddd13e 100644 --- a/src/plugins/nat/in2out_ed.c +++ b/src/plugins/nat/in2out_ed.c @@ -1045,11 +1045,11 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, dst_address); ip0->checksum = ip_csum_fold (sum0); + old_port0 = udp0->src_port; + new_port0 = udp0->src_port = s0->out2in.port; + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) { - old_port0 = tcp0->src_port; - new_port0 = tcp0->src_port = s0->out2in.port; - sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address); @@ -1073,10 +1073,29 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, (sm, s0, tcp0, thread_index)) goto trace00; } + else if (udp0->checksum) + { + sum0 = udp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, + length); + if (PREDICT_FALSE (is_twice_nat_session (s0))) + { + sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, + s0->ext_host_addr.as_u32, + ip4_header_t, dst_address); + sum0 = ip_csum_update (sum0, tcp0->dst_port, + s0->ext_host_port, ip4_header_t, + length); + udp0->dst_port = s0->ext_host_port; + ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; + } + udp0->checksum = ip_csum_fold (sum0); + udp_packets++; + } else { - udp0->src_port = s0->out2in.port; - udp0->checksum = 0; if (PREDICT_FALSE (is_twice_nat_session (s0))) { udp0->dst_port = s0->ext_host_port; @@ -1255,11 +1274,11 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, dst_address); ip1->checksum = ip_csum_fold (sum1); + old_port1 = udp1->src_port; + new_port1 = udp1->src_port = s1->out2in.port; + if (PREDICT_TRUE (proto1 == SNAT_PROTOCOL_TCP)) { - old_port1 = tcp1->src_port; - new_port1 = tcp1->src_port = s1->out2in.port; - sum1 = tcp1->checksum; sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, dst_address); @@ -1283,10 +1302,30 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, (sm, s1, tcp1, thread_index)) goto trace01; } + else if (udp1->checksum) + { + sum1 = udp1->checksum; + sum1 = ip_csum_update (sum1, old_addr1, new_addr1, ip4_header_t, + dst_address); + sum1 = ip_csum_update (sum1, old_port1, new_port1, ip4_header_t, + length); + + if (PREDICT_FALSE (is_twice_nat_session (s1))) + { + sum1 = ip_csum_update (sum1, ip1->dst_address.as_u32, + s1->ext_host_addr.as_u32, + ip4_header_t, dst_address); + sum1 = ip_csum_update (sum1, tcp1->dst_port, + s1->ext_host_port, ip4_header_t, + length); + udp1->dst_port = s1->ext_host_port; + ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32; + } + udp1->checksum = ip_csum_fold (sum1); + udp_packets++; + } else { - udp1->src_port = s1->out2in.port; - udp1->checksum = 0; if (PREDICT_FALSE (is_twice_nat_session (s1))) { udp1->dst_port = s1->ext_host_port; @@ -1493,11 +1532,11 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, dst_address); ip0->checksum = ip_csum_fold (sum0); + old_port0 = udp0->src_port; + new_port0 = udp0->src_port = s0->out2in.port; + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) { - old_port0 = tcp0->src_port; - new_port0 = tcp0->src_port = s0->out2in.port; - sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, dst_address); @@ -1521,10 +1560,29 @@ nat44_ed_in2out_node_fn_inline (vlib_main_t * vm, (sm, s0, tcp0, thread_index)) goto trace0; } + else if (udp0->checksum) + { + sum0 = udp0->checksum; + sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + sum0 = ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, + length); + if (PREDICT_FALSE (is_twice_nat_session (s0))) + { + sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, + s0->ext_host_addr.as_u32, + ip4_header_t, dst_address); + sum0 = ip_csum_update (sum0, tcp0->dst_port, + s0->ext_host_port, ip4_header_t, + length); + udp0->dst_port = s0->ext_host_port; + ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; + } + udp0->checksum = ip_csum_fold (sum0); + udp_packets++; + } else { - udp0->src_port = s0->out2in.port; - udp0->checksum = 0; if (PREDICT_FALSE (is_twice_nat_session (s0))) { udp0->dst_port = s0->ext_host_port; @@ -1915,12 +1973,11 @@ nat44_ed_in2out_reass_node_fn_inline (vlib_main_t * vm, if (PREDICT_FALSE (ip4_is_first_fragment (ip0))) { + old_port0 = udp0->src_port; + new_port0 = udp0->src_port = s0->out2in.port; + if (PREDICT_TRUE (proto0 == SNAT_PROTOCOL_TCP)) { - old_port0 = tcp0->src_port; - tcp0->src_port = s0->out2in.port; - new_port0 = tcp0->src_port; - sum0 = tcp0->checksum; sum0 = ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, @@ -1941,11 +1998,30 @@ nat44_ed_in2out_reass_node_fn_inline (vlib_main_t * vm, } tcp0->checksum = ip_csum_fold (sum0); } + else if (udp0->checksum) + { + sum0 = udp0->checksum; + sum0 = + ip_csum_update (sum0, old_addr0, new_addr0, ip4_header_t, + dst_address); + sum0 = + ip_csum_update (sum0, old_port0, new_port0, ip4_header_t, + length); + if (PREDICT_FALSE (is_twice_nat_session (s0))) + { + sum0 = ip_csum_update (sum0, ip0->dst_address.as_u32, + s0->ext_host_addr.as_u32, + ip4_header_t, dst_address); + sum0 = ip_csum_update (sum0, tcp0->dst_port, + s0->ext_host_port, ip4_header_t, + length); + udp0->dst_port = s0->ext_host_port; + ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32; + } + udp0->checksum = ip_csum_fold (sum0); + } else { - old_port0 = udp0->src_port; - udp0->src_port = s0->out2in.port; - udp0->checksum = 0; if (PREDICT_FALSE (is_twice_nat_session (s0))) { udp0->dst_port = s0->ext_host_port; |