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Minor bugfix to spgw.p4

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Change-Id: I2668883ba73558d445f05b7d2e3901252b5a640c
This commit is contained in:
Carmelo Cascone 2018-02-14 20:32:49 -08:00
parent 7da7e62eb8
commit 274daef03e
2 changed files with 7 additions and 3 deletions
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1
pipelines/fabric/src/main/resources/include/header.p4
View File

@ -133,6 +133,7 @@ header gtpu_t {
struct spgw_meta_t {
bool do_spgw;
direction_t direction;
bit<16> ipv4_len;
bit<32> teid;
bit<32> s1u_enb_addr;
bit<32> s1u_sgw_addr;

9
pipelines/fabric/src/main/resources/include/spgw.p4
View File

@ -194,6 +194,9 @@ control spgw_ingress(
}
ue_cdr_table.apply();
}
// Don't ask why... we'll need this later.
spgw_meta.ipv4_len = ipv4.total_len;
}
}
@ -212,7 +215,7 @@ control spgw_egress(
gtpu_ipv4.version = IP_VERSION_4;
gtpu_ipv4.ihl = IPV4_MIN_IHL;
gtpu_ipv4.diffserv = 0;
gtpu_ipv4.total_len = ipv4.total_len
gtpu_ipv4.total_len = spgw_meta.ipv4_len
+ (IPV4_HDR_SIZE + UDP_HDR_SIZE + GTP_HDR_SIZE);
gtpu_ipv4.identification = 0x1513; /* From NGIC */
gtpu_ipv4.flags = 0;
@ -226,7 +229,7 @@ control spgw_egress(
gtpu_udp.setValid();
gtpu_udp.src_port = UDP_PORT_GTPU;
gtpu_udp.dst_port = UDP_PORT_GTPU;
gtpu_udp.len = ipv4.total_len
gtpu_udp.len = spgw_meta.ipv4_len
+ (UDP_HDR_SIZE + GTP_HDR_SIZE);
gtpu_udp.checksum = 0; // Updated later
@ -238,7 +241,7 @@ control spgw_egress(
gtpu.seq_flag = 0;
gtpu.npdu_flag = 0;
gtpu.msgtype = GTP_GPDU;
gtpu.msglen = ipv4.total_len;
gtpu.msglen = spgw_meta.ipv4_len;
gtpu.teid = spgw_meta.teid;
}