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NAT: TCP MSS clamping
[vpp.git]
/
src
/
plugins
/
nat
/
in2out.c
diff --git
a/src/plugins/nat/in2out.c
b/src/plugins/nat/in2out.c
index
22a3468
..
661d8c1
100755
(executable)
--- a/
src/plugins/nat/in2out.c
+++ b/
src/plugins/nat/in2out.c
@@
-1336,6
+1336,7
@@
snat_in2out_node_fn_inline (vlib_main_t * vm,
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
}
else
tcp0->checksum = ip_csum_fold(sum0);
}
else
@@
-1496,6
+1497,7
@@
snat_in2out_node_fn_inline (vlib_main_t * vm,
sum1 = ip_csum_update (sum1, old_port1, new_port1,
ip4_header_t /* cheat */,
length /* changed member */);
sum1 = ip_csum_update (sum1, old_port1, new_port1,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp1, &sum1);
tcp1->checksum = ip_csum_fold(sum1);
}
else
tcp1->checksum = ip_csum_fold(sum1);
}
else
@@
-1693,6
+1695,7
@@
snat_in2out_node_fn_inline (vlib_main_t * vm,
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
}
else
tcp0->checksum = ip_csum_fold(sum0);
}
else
@@
-3354,6
+3357,7
@@
nat44_ed_in2out_node_fn_inline (vlib_main_t * vm,
tcp0->dst_port = s0->ext_host_port;
ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
}
tcp0->dst_port = s0->ext_host_port;
ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
}
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
if (nat44_set_tcp_session_state_i2o (sm, s0, tcp0, thread_index))
goto trace00;
tcp0->checksum = ip_csum_fold(sum0);
if (nat44_set_tcp_session_state_i2o (sm, s0, tcp0, thread_index))
goto trace00;
@@
-3539,6
+3543,7
@@
nat44_ed_in2out_node_fn_inline (vlib_main_t * vm,
ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
}
tcp1->checksum = ip_csum_fold(sum1);
ip1->dst_address.as_u32 = s1->ext_host_addr.as_u32;
}
tcp1->checksum = ip_csum_fold(sum1);
+ mss_clamping (sm, tcp1, &sum1);
if (nat44_set_tcp_session_state_i2o (sm, s1, tcp1, thread_index))
goto trace01;
}
if (nat44_set_tcp_session_state_i2o (sm, s1, tcp1, thread_index))
goto trace01;
}
@@
-3751,6
+3756,7
@@
nat44_ed_in2out_node_fn_inline (vlib_main_t * vm,
tcp0->dst_port = s0->ext_host_port;
ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
}
tcp0->dst_port = s0->ext_host_port;
ip0->dst_address.as_u32 = s0->ext_host_addr.as_u32;
}
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
if (nat44_set_tcp_session_state_i2o (sm, s0, tcp0, thread_index))
goto trace0;
tcp0->checksum = ip_csum_fold(sum0);
if (nat44_set_tcp_session_state_i2o (sm, s0, tcp0, thread_index))
goto trace0;
@@
-4122,6
+4128,7
@@
snat_det_in2out_node_fn (vlib_main_t * vm,
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
}
else
tcp0->checksum = ip_csum_fold(sum0);
}
else
@@
-4272,6
+4279,7
@@
snat_det_in2out_node_fn (vlib_main_t * vm,
sum1 = ip_csum_update (sum1, old_port1, new_port1,
ip4_header_t /* cheat */,
length /* changed member */);
sum1 = ip_csum_update (sum1, old_port1, new_port1,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp1, &sum1);
tcp1->checksum = ip_csum_fold(sum1);
}
else
tcp1->checksum = ip_csum_fold(sum1);
}
else
@@
-4458,6
+4466,7
@@
snat_det_in2out_node_fn (vlib_main_t * vm,
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
}
else
tcp0->checksum = ip_csum_fold(sum0);
}
else
@@
-5354,6
+5363,7
@@
snat_in2out_fast_static_map_fn (vlib_main_t * vm,
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
sum0 = ip_csum_update (sum0, old_port0, new_port0,
ip4_header_t /* cheat */,
length /* changed member */);
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
}
else
tcp0->checksum = ip_csum_fold(sum0);
}
else
@@
-5371,6
+5381,7
@@
snat_in2out_fast_static_map_fn (vlib_main_t * vm,
sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
ip4_header_t,
dst_address /* changed member */);
sum0 = ip_csum_update (sum0, old_addr0, new_addr0,
ip4_header_t,
dst_address /* changed member */);
+ mss_clamping (sm, tcp0, &sum0);
tcp0->checksum = ip_csum_fold(sum0);
}
}
tcp0->checksum = ip_csum_fold(sum0);
}
}