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Made GTP UPD checksum update optinal in SPGW

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Change-Id: Icb38c47aeff533bd108a96b77e1b7c1ec866bc0a
This commit is contained in:
Carmelo Cascone 2018-02-01 13:30:18 -08:00
parent 42b6203896
commit 33e85c04bc
2 changed files with 9 additions and 6 deletions
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2
pipelines/fabric/src/main/resources/fabric.p4
View File

@ -66,7 +66,7 @@ control FabricEgress (inout parsed_headers_t hdr,
apply {
pkt_io_egress.apply(hdr, fabric_metadata, standard_metadata);
#ifdef WITH_SPGW
spgw_egress.apply(hdr.gtpu_ipv4, hdr.gtpu_udp, hdr.gtpu,
spgw_egress.apply(hdr.ipv4, hdr.gtpu_ipv4, hdr.gtpu_udp, hdr.gtpu,
fabric_metadata.spgw, standard_metadata);
#endif // WITH_SPGW
}

13
pipelines/fabric/src/main/resources/include/spgw.p4
View File

@ -199,6 +199,7 @@ control spgw_ingress(
control spgw_egress(
in ipv4_t ipv4,
out ipv4_t gtpu_ipv4,
out udp_t gtpu_udp,
out gtpu_t gtpu,
@ -211,8 +212,8 @@ control spgw_egress(
gtpu_ipv4.version = IP_VERSION_4;
gtpu_ipv4.ihl = IPV4_MIN_IHL;
gtpu_ipv4.diffserv = 0;
gtpu_ipv4.total_len = ((bit<16>)std_meta.packet_length
- ETH_HDR_SIZE + IPV4_HDR_SIZE + UDP_HDR_SIZE + GTP_HDR_SIZE);
gtpu_ipv4.total_len = ipv4.total_len
+ (IPV4_HDR_SIZE + UDP_HDR_SIZE + GTP_HDR_SIZE);
gtpu_ipv4.identification = 0x1513; /* From NGIC */
gtpu_ipv4.flags = 0;
gtpu_ipv4.frag_offset = 0;
@ -225,8 +226,8 @@ control spgw_egress(
gtpu_udp.setValid();
gtpu_udp.src_port = UDP_PORT_GTPU;
gtpu_udp.dst_port = UDP_PORT_GTPU;
gtpu_udp.len = ((bit<16>)std_meta.packet_length
- ETH_HDR_SIZE + UDP_HDR_SIZE + GTP_HDR_SIZE);
gtpu_udp.len = ipv4.total_len
+ (UDP_HDR_SIZE + GTP_HDR_SIZE);
gtpu_udp.checksum = 0; // Updated later
gtpu.setValid();
@ -237,7 +238,7 @@ control spgw_egress(
gtpu.seq_flag = 0;
gtpu.npdu_flag = 0;
gtpu.msgtype = GTP_GPDU;
gtpu.msglen = ((bit<16>)std_meta.packet_length - ETH_HDR_SIZE);
gtpu.msglen = ipv4.total_len;
gtpu.teid = spgw_meta.teid;
}
@ -307,6 +308,7 @@ control update_gtpu_checksum(
HashAlgorithm.csum16
);
#ifdef WITH_SPGW_UDP_CSUM_UPDATE
// Compute outer UDP checksum.
update_checksum_with_payload(gtpu_udp.isValid(),
{
@ -327,6 +329,7 @@ control update_gtpu_checksum(
gtpu_udp.checksum,
HashAlgorithm.csum16
);
#endif // WITH_SPGW_UDP_CSUM_UPDATE
}
}