This patch enables testpmd to forward GTP packet in csum fwd mode.
A GTP header structure (without optional fields and extension header)
is defined in new rte_gtp.h. A parser function in testpmd is added.
GTPU and GTPC packets are both supported, with respective UDP
destination port and GTP message type.
Signed-off-by: Ting Xu <ting...@intel.com>
---
v5: Create rte_gtp.h and move GTP header defination
to it.
v4: Move GTP header defination to rte_ether.h
v3: correct coding style issue.
v2: modify commit log
depend on patch: lib/mbuf: add GTP tunnel type flag.
---
app/test-pmd/csumonly.c | 97 +++++++++++++++++++++++++++++++++++-----
lib/librte_net/Makefile | 2 +-
lib/librte_net/rte_gtp.h | 52 +++++++++++++++++++++
3 files changed, 140 insertions(+), 11 deletions(-)
create mode 100644 lib/librte_net/rte_gtp.h
diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c
index e1cb7fb70..c3fd5e17d 100644
--- a/app/test-pmd/csumonly.c
+++ b/app/test-pmd/csumonly.c
@@ -36,6 +36,7 @@
#include <rte_tcp.h>
#include <rte_udp.h>
#include <rte_sctp.h>
+#include <rte_gtp.h>
#include <rte_prefetch.h>
#include <rte_string_fns.h>
#include <rte_flow.h>
@@ -179,6 +180,67 @@ parse_ethernet(struct rte_ether_hdr *eth_hdr, struct
testpmd_offload_info *info)
}
}
+/*
+ * Parse a GTP protocol header.
+ * No optional fields and next extension header type.
+ */
+static void
+parse_gtp(struct rte_udp_hdr *udp_hdr,
+ struct testpmd_offload_info *info)
+{
+ struct rte_ipv4_hdr *ipv4_hdr;
+ struct rte_ipv6_hdr *ipv6_hdr;
+ struct rte_gtp_hdr *gtp_hdr;
+ uint8_t gtp_len = sizeof(*gtp_hdr);
+ uint8_t ip_ver;
+
+ /* Check udp destination port. */
+ if (udp_hdr->dst_port != _htons(RTE_GTPC_UDP_PORT) &&
+ udp_hdr->src_port != _htons(RTE_GTPC_UDP_PORT) &&
+ 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;
+ info->l2_len = 0;
+
+ gtp_hdr = (struct rte_gtp_hdr *)((char *)udp_hdr +
+ sizeof(struct rte_udp_hdr));
+
+ /*
+ * Check message type. If message type is 0xff, it is
+ * a GTP data packet. If not, it is a GTP control packet
+ */
+ if (gtp_hdr->msg_type == 0xff) {
+ ip_ver = *(uint8_t *)((char *)udp_hdr +
+ sizeof(struct rte_udp_hdr) +
+ sizeof(struct rte_gtp_hdr));
+ ip_ver = (ip_ver) & 0xf0;
+
+ if (ip_ver == RTE_GTP_TYPE_IPV4) {
+ ipv4_hdr = (struct rte_ipv4_hdr *)((char *)gtp_hdr +
+ gtp_len);
+ info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
+ parse_ipv4(ipv4_hdr, info);
+ } else if (ip_ver == RTE_GTP_TYPE_IPV6) {
+ ipv6_hdr = (struct rte_ipv6_hdr *)((char *)gtp_hdr +
+ gtp_len);
+ info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
+ parse_ipv6(ipv6_hdr, info);
+ }
+ } else {
+ info->ethertype = 0;
+ info->l4_len = 0;
+ info->l3_len = 0;
+ info->l4_proto = 0;
+ }
+
+ info->l2_len += RTE_ETHER_GTP_HLEN;
+}
+
/* Parse a vxlan header */
static void
parse_vxlan(struct rte_udp_hdr *udp_hdr,
@@ -478,15 +540,22 @@ process_outer_cksums(void *outer_l3_hdr, struct
testpmd_offload_info *info,
if (info->outer_l4_proto != IPPROTO_UDP)
return ol_flags;
+ udp_hdr = (struct rte_udp_hdr *)
+ ((char *)outer_l3_hdr + info->outer_l3_len);
+
/* Skip SW outer UDP checksum generation if HW supports it */
if (tx_offloads & DEV_TX_OFFLOAD_OUTER_UDP_CKSUM) {
+ if (info->outer_ethertype == _htons(RTE_ETHER_TYPE_IPV4))
+ udp_hdr->dgram_cksum
+ = rte_ipv4_phdr_cksum(ipv4_hdr, ol_flags);
+ else
+ udp_hdr->dgram_cksum
+ = rte_ipv6_phdr_cksum(ipv6_hdr, ol_flags);
+
ol_flags |= PKT_TX_OUTER_UDP_CKSUM;
return ol_flags;
}
- udp_hdr = (struct rte_udp_hdr *)
- ((char *)outer_l3_hdr + info->outer_l3_len);
-
/* outer UDP checksum is done in software. In the other side, for
* UDP tunneling, like VXLAN or Geneve, outer UDP checksum can be
* set to zero.
@@ -679,6 +748,7 @@ pkt_copy_split(const struct rte_mbuf *pkt)
* UDP|TCP|SCTP
* Ether / (vlan) / outer IP|IP6 / outer UDP / VXLAN-GPE / IP|IP6 /
* UDP|TCP|SCTP
+ * Ether / (vlan) / outer IP / outer UDP / GTP / IP|IP6 / UDP|TCP|SCTP
* Ether / (vlan) / outer IP|IP6 / GRE / Ether / IP|IP6 / UDP|TCP|SCTP
* Ether / (vlan) / outer IP|IP6 / GRE / IP|IP6 / UDP|TCP|SCTP
* Ether / (vlan) / outer IP|IP6 / IP|IP6 / UDP|TCP|SCTP
@@ -787,16 +857,22 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
udp_hdr = (struct rte_udp_hdr *)
((char *)l3_hdr + info.l3_len);
+ parse_gtp(udp_hdr, &info);
+ if (info.is_tunnel) {
+ tx_ol_flags |= PKT_TX_TUNNEL_GTP;
+ goto tunnel_update;
+ }
parse_vxlan_gpe(udp_hdr, &info);
if (info.is_tunnel) {
- tx_ol_flags |= PKT_TX_TUNNEL_VXLAN_GPE;
- } else {
- parse_vxlan(udp_hdr, &info,
- m->packet_type);
- if (info.is_tunnel)
- tx_ol_flags |=
- PKT_TX_TUNNEL_VXLAN;
+ tx_ol_flags |=
+ PKT_TX_TUNNEL_VXLAN_GPE;
+ goto tunnel_update;
}
+ parse_vxlan(udp_hdr, &info,
+ m->packet_type);
+ if (info.is_tunnel)
+ tx_ol_flags |=
+ PKT_TX_TUNNEL_VXLAN;
} else if (info.l4_proto == IPPROTO_GRE) {
struct simple_gre_hdr *gre_hdr;
@@ -815,6 +891,7 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
}
}
+tunnel_update:
/* update l3_hdr and outer_l3_hdr if a tunnel was parsed */
if (info.is_tunnel) {
outer_l3_hdr = l3_hdr;
diff --git a/lib/librte_net/Makefile b/lib/librte_net/Makefile
index 1244c9fd5..4ad02aee0 100644
--- a/lib/librte_net/Makefile
+++ b/lib/librte_net/Makefile
@@ -20,7 +20,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_NET) += rte_arp.c
# install includes
SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include := rte_ip.h rte_tcp.h rte_udp.h
rte_esp.h
SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include += rte_sctp.h rte_icmp.h rte_arp.h
-SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include += rte_ether.h rte_gre.h rte_net.h
+SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include += rte_ether.h rte_gre.h rte_gtp.h
rte_net.h
SYMLINK-$(CONFIG_RTE_LIBRTE_NET)-include += rte_net_crc.h rte_mpls.h
include $(RTE_SDK)/mk/rte.lib.mk
diff --git a/lib/librte_net/rte_gtp.h b/lib/librte_net/rte_gtp.h
new file mode 100644
index 000000000..8fe51de14
--- /dev/null
+++ b/lib/librte_net/rte_gtp.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 1982, 1986, 1990, 1993
+ * The Regents of the University of California.
+ * Copyright(c) 2010-2014 Intel Corporation.
+ * All rights reserved.
+ */
+
+#ifndef _RTE_GTP_H_
+#define _RTE_GTP_H_
+
+/**
+ * @file
+ *
+ * GTP-related defines
+ */
+
+#include <stdint.h>
+#include <rte_byteorder.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Simplified GTP protocol header.
+ * Contains 8-bit flag, 8-bit message type,
+ * 16-bit message length, 32-bit TEID.
+ * No optional fields and next extension header.
+ */
+struct rte_gtp_hdr {
+ uint8_t gtp_hdr_info; /**< GTP header info. */
+ uint8_t msg_type; /**< GTP message type. */
+ uint16_t msg_len; /**< Total message length. */
+ uint32_t teid; /**< Tunnel endpoint ID */
+} __attribute__((__packed__));
+
+/* GTP header length */
+#define RTE_ETHER_GTP_HLEN \
+ (sizeof(struct rte_udp_hdr) + sizeof(struct rte_gtp_hdr))
+/* GTP next protocal type */
+#define RTE_GTP_TYPE_IPV4 0x40
+#define RTE_GTP_TYPE_IPV6 0x60
+/* GTP destination port number */
+#define RTE_GTPC_UDP_PORT 2123
+#define RTE_GTPU_UDP_PORT 2152
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* RTE_GTP_H_ */
+
--
2.17.1
