[dpdk-dev] [PATCH v2 3/3] app/testpmd: reduce tunnel parsing code duplication

[Ophir Munk]

From: Ophir Munk <ophirmu at mellanox.com>

This is a cleanup commit. It assembles all tunnel outer updates into one
function call to avoid code duplications.
It defines RTE_VXLAN_GPE_DEFAULT_PORT (4790) in accordance with all
other tunnel protocol definitions.

Signed-off-by: Ophir Munk <ophirmu at mellanox.com>
---
 app/test-pmd/csumonly.c    | 72 +++++++++++++---------------------------------
 lib/librte_net/rte_vxlan.h |  1 +
 2 files changed, 21 insertions(+), 52 deletions(-)

diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c
index 5f29868..3a0e46e 100644
--- a/app/test-pmd/csumonly.c
+++ b/app/test-pmd/csumonly.c
@@ -63,7 +63,7 @@
 #define _htons(x) (x)
 #endif
 
-uint16_t vxlan_gpe_udp_port = 4790;
+uint16_t vxlan_gpe_udp_port = RTE_VXLAN_GPE_DEFAULT_PORT;
 uint16_t geneve_udp_port = RTE_GENEVE_DEFAULT_PORT;
 
 /* structure that caches offload info for the current packet */
@@ -181,6 +181,17 @@ parse_ethernet(struct rte_ether_hdr *eth_hdr, struct testpmd_offload_info *info)
 	}
 }
 
+/* Fill in outer layers length */
+static void
+update_tunnel_outer(struct testpmd_offload_info *info)
+{
+	info->is_tunnel = 1;
+	info->outer_ethertype = info->ethertype;
+	info->outer_l2_len = info->l2_len;
+	info->outer_l3_len = info->l3_len;
+	info->outer_l4_proto = info->l4_proto;
+}
+
 /*
  * Parse a GTP protocol header.
  * No optional fields and next extension header type.
@@ -201,11 +212,7 @@ parse_gtp(struct rte_udp_hdr *udp_hdr,
 	    udp_hdr->dst_port != _htons(RTE_GTPU_UDP_PORT))
 		return;
 
-	info->is_tunnel = 1;
-	info->outer_ethertype = info->ethertype;
-	info->outer_l2_len = info->l2_len;
-	info->outer_l3_len = info->l3_len;
-	info->outer_l4_proto = info->l4_proto;
+	update_tunnel_outer(info);
 	info->l2_len = 0;
 
 	gtp_hdr = (struct rte_gtp_hdr *)((char *)udp_hdr +
@@ -257,11 +264,7 @@ parse_vxlan(struct rte_udp_hdr *udp_hdr,
 		RTE_ETH_IS_TUNNEL_PKT(pkt_type) == 0)
 		return;
 
-	info->is_tunnel = 1;
-	info->outer_ethertype = info->ethertype;
-	info->outer_l2_len = info->l2_len;
-	info->outer_l3_len = info->l3_len;
-	info->outer_l4_proto = info->l4_proto;
+	update_tunnel_outer(info);
 
 	eth_hdr = (struct rte_ether_hdr *)((char *)udp_hdr +
 		sizeof(struct rte_udp_hdr) +
@@ -291,11 +294,7 @@ parse_vxlan_gpe(struct rte_udp_hdr *udp_hdr,
 
 	if (!vxlan_gpe_hdr->proto || vxlan_gpe_hdr->proto ==
 	    RTE_VXLAN_GPE_TYPE_IPV4) {
-		info->is_tunnel = 1;
-		info->outer_ethertype = info->ethertype;
-		info->outer_l2_len = info->l2_len;
-		info->outer_l3_len = info->l3_len;
-		info->outer_l4_proto = info->l4_proto;
+		update_tunnel_outer(info);
 
 		ipv4_hdr = (struct rte_ipv4_hdr *)((char *)vxlan_gpe_hdr +
 			   vxlan_gpe_len);
@@ -305,11 +304,7 @@ parse_vxlan_gpe(struct rte_udp_hdr *udp_hdr,
 		info->l2_len = 0;
 
 	} else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_IPV6) {
-		info->is_tunnel = 1;
-		info->outer_ethertype = info->ethertype;
-		info->outer_l2_len = info->l2_len;
-		info->outer_l3_len = info->l3_len;
-		info->outer_l4_proto = info->l4_proto;
+		update_tunnel_outer(info);
 
 		ipv6_hdr = (struct rte_ipv6_hdr *)((char *)vxlan_gpe_hdr +
 			   vxlan_gpe_len);
@@ -319,11 +314,7 @@ parse_vxlan_gpe(struct rte_udp_hdr *udp_hdr,
 		info->l2_len = 0;
 
 	} else if (vxlan_gpe_hdr->proto == RTE_VXLAN_GPE_TYPE_ETH) {
-		info->is_tunnel = 1;
-		info->outer_ethertype = info->ethertype;
-		info->outer_l2_len = info->l2_len;
-		info->outer_l3_len = info->l3_len;
-		info->outer_l4_proto = info->l4_proto;
+		update_tunnel_outer(info);
 
 		eth_hdr = (struct rte_ether_hdr *)((char *)vxlan_gpe_hdr +
 			  vxlan_gpe_len);
@@ -335,17 +326,6 @@ parse_vxlan_gpe(struct rte_udp_hdr *udp_hdr,
 	info->l2_len += RTE_ETHER_VXLAN_GPE_HLEN;
 }
 
-/* Fill in outer layers length */
-static void
-update_tunnel_outer(struct testpmd_offload_info *info)
-{
-	info->is_tunnel = 1;
-	info->outer_ethertype = info->ethertype;
-	info->outer_l2_len = info->l2_len;
-	info->outer_l3_len = info->l3_len;
-	info->outer_l4_proto = info->l4_proto;
-}
-
 /* Parse a geneve header */
 static void
 parse_geneve(struct rte_udp_hdr *udp_hdr,
@@ -412,11 +392,7 @@ parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
 		gre_len += GRE_EXT_LEN;
 
 	if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPV4)) {
-		info->is_tunnel = 1;
-		info->outer_ethertype = info->ethertype;
-		info->outer_l2_len = info->l2_len;
-		info->outer_l3_len = info->l3_len;
-		info->outer_l4_proto = info->l4_proto;
+		update_tunnel_outer(info);
 
 		ipv4_hdr = (struct rte_ipv4_hdr *)((char *)gre_hdr + gre_len);
 
@@ -425,11 +401,7 @@ parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
 		info->l2_len = 0;
 
 	} else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_IPV6)) {
-		info->is_tunnel = 1;
-		info->outer_ethertype = info->ethertype;
-		info->outer_l2_len = info->l2_len;
-		info->outer_l3_len = info->l3_len;
-		info->outer_l4_proto = info->l4_proto;
+		update_tunnel_outer(info);
 
 		ipv6_hdr = (struct rte_ipv6_hdr *)((char *)gre_hdr + gre_len);
 
@@ -438,11 +410,7 @@ parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
 		info->l2_len = 0;
 
 	} else if (gre_hdr->proto == _htons(RTE_ETHER_TYPE_TEB)) {
-		info->is_tunnel = 1;
-		info->outer_ethertype = info->ethertype;
-		info->outer_l2_len = info->l2_len;
-		info->outer_l3_len = info->l3_len;
-		info->outer_l4_proto = info->l4_proto;
+		update_tunnel_outer(info);
 
 		eth_hdr = (struct rte_ether_hdr *)((char *)gre_hdr + gre_len);
 
diff --git a/lib/librte_net/rte_vxlan.h b/lib/librte_net/rte_vxlan.h
index c23c10c..2ad6061 100644
--- a/lib/librte_net/rte_vxlan.h
+++ b/lib/librte_net/rte_vxlan.h
@@ -22,6 +22,7 @@ extern "C" {
 
 /** VXLAN default port. */
 #define RTE_VXLAN_DEFAULT_PORT 4789
+#define RTE_VXLAN_GPE_DEFAULT_PORT 4790
 
 /**
  * VXLAN protocol header.
-- 
2.8.4