tcp: avoid fr segments less than mss if possible

[vpp.git] / src / vnet / interface_output.h

diff --git a/src/vnet/interface_output.h b/src/vnet/interface_output.h
index f1fa4d8..b512d9a 100644 (file)
--- a/src/vnet/interface_output.h
+++ b/src/vnet/interface_output.h
@@ -41,17 +41,57 @@
 #define __INTERFACE_INLINES_H__
 
 #include <vnet/vnet.h>
+#include <vnet/tcp/tcp_packet.h>
 
 static_always_inline void
-calc_checksums (vlib_main_t * vm, vlib_buffer_t * b)
+vnet_calc_ip4_checksums (vlib_main_t *vm, vlib_buffer_t *b, ip4_header_t *ip4,
+                        tcp_header_t *th, udp_header_t *uh,
+                        vnet_buffer_oflags_t oflags)
+{
+  if (oflags & VNET_BUFFER_OFFLOAD_F_IP_CKSUM)
+    ip4->checksum = ip4_header_checksum (ip4);
+  if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
+    {
+      th->checksum = 0;
+      th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
+    }
+  if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
+    {
+      uh->checksum = 0;
+      uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
+    }
+}
+
+static_always_inline void
+vnet_calc_ip6_checksums (vlib_main_t *vm, vlib_buffer_t *b, ip6_header_t *ip6,
+                        tcp_header_t *th, udp_header_t *uh,
+                        vnet_buffer_oflags_t oflags)
+{
+  int bogus;
+  if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
+    {
+      th->checksum = 0;
+      th->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
+    }
+  if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
+    {
+      uh->checksum = 0;
+      uh->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
+    }
+}
+
+static_always_inline void
+vnet_calc_checksums_inline (vlib_main_t * vm, vlib_buffer_t * b,
+                           int is_ip4, int is_ip6)
 {
   ip4_header_t *ip4;
   ip6_header_t *ip6;
   tcp_header_t *th;
   udp_header_t *uh;
+  vnet_buffer_oflags_t oflags;
 
-  int is_ip4 = (b->flags & VNET_BUFFER_F_IS_IP4) != 0;
-  int is_ip6 = (b->flags & VNET_BUFFER_F_IS_IP6) != 0;
+  if (!(b->flags & VNET_BUFFER_F_OFFLOAD))
+    return;
 
   ASSERT (!(is_ip4 && is_ip6));
 
@@ -59,44 +99,52 @@ calc_checksums (vlib_main_t * vm, vlib_buffer_t * b)
   ip6 = (ip6_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
   th = (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
   uh = (udp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
+  oflags = vnet_buffer (b)->oflags;
 
   if (is_ip4)
     {
-      if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
-       ip4->checksum = ip4_header_checksum (ip4);
-      if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
-       {
-         th->checksum = 0;
-         th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
-       }
-      if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
-       {
-         uh->checksum = 0;
-         uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
-       }
+      vnet_calc_ip4_checksums (vm, b, ip4, th, uh, oflags);
     }
-  if (is_ip6)
+  else if (is_ip6)
     {
-      int bogus;
-      if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
-       {
-         th->checksum = 0;
-         th->checksum =
-           ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
-       }
-      if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
-       {
-         uh->checksum = 0;
-         uh->checksum =
-           ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
-       }
+      vnet_calc_ip6_checksums (vm, b, ip6, th, uh, oflags);
     }
 
-  b->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
-  b->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
-  b->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
+  vnet_buffer_offload_flags_clear (b, (VNET_BUFFER_OFFLOAD_F_IP_CKSUM |
+                                      VNET_BUFFER_OFFLOAD_F_UDP_CKSUM |
+                                      VNET_BUFFER_OFFLOAD_F_TCP_CKSUM));
 }
 
+static_always_inline void
+vnet_calc_outer_checksums_inline (vlib_main_t *vm, vlib_buffer_t *b)
+{
+
+  if (!(b->flags & VNET_BUFFER_F_OFFLOAD))
+    return;
+
+  vnet_buffer_oflags_t oflags = vnet_buffer (b)->oflags;
+  if (oflags & VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM)
+    {
+      ip4_header_t *ip4;
+      ip4 = (ip4_header_t *) (b->data + vnet_buffer2 (b)->outer_l3_hdr_offset);
+      ip4->checksum = ip4_header_checksum (ip4);
+      vnet_buffer_offload_flags_clear (b,
+                                      VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM);
+    }
+  else if (oflags & VNET_BUFFER_OFFLOAD_F_OUTER_UDP_CKSUM)
+    {
+      int bogus;
+      ip6_header_t *ip6;
+      udp_header_t *uh;
+
+      ip6 = (ip6_header_t *) (b->data + vnet_buffer2 (b)->outer_l3_hdr_offset);
+      uh = (udp_header_t *) (b->data + vnet_buffer2 (b)->outer_l4_hdr_offset);
+      uh->checksum = 0;
+      uh->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
+      vnet_buffer_offload_flags_clear (b,
+                                      VNET_BUFFER_OFFLOAD_F_OUTER_UDP_CKSUM);
+    }
+}
 #endif
 
 /*