Adding PROX(Packet pROcessing eXecution engine) VNF to sampleVNF

JIRA: SAMPLEVNF-55

PROX is a DPDK-based application implementing Telco use-cases such as
a simplified BRAS/BNG, light-weight AFTR... It also allows configuring
finer grained network functions like QoS, Routing, load-balancing...

(We are moving PROX version v039 to sampleVNF
https://01.org/intel-data-plane-performance-demonstrators/prox-overview)

Change-Id: Ia3cb02cf0e49ac5596e922c197ff7e010293d033
Signed-off-by: Deepak S <deepak.s@linux.intel.com>

1 files changed, 117 insertions, 0 deletions

diff --git a/VNFs/DPPD-PROX/handle_l2fwd.c b/VNFs/DPPD-PROX/handle_l2fwd.c
new file mode 100644
index 00000000..79a5f02e
--- /dev/null
+++ b/VNFs/DPPD-PROX/handle_l2fwd.c
@@ -0,0 +1,117 @@
+/*
+// Copyright (c) 2010-2017 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#include <rte_mbuf.h>
+
+#include "task_init.h"
+#include "task_base.h"
+#include "lconf.h"
+#include "log.h"
+#include "prox_port_cfg.h"
+
+struct task_l2fwd {
+	struct task_base base;
+	uint8_t src_dst_mac[12];
+	uint32_t runtime_flags;
+};
+
+static int handle_l2fwd_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts)
+{
+	struct task_l2fwd *task = (struct task_l2fwd *)tbase;
+	struct ether_hdr *hdr;
+	struct ether_addr mac;
+
+	if ((task->runtime_flags & (TASK_ARG_DST_MAC_SET|TASK_ARG_SRC_MAC_SET)) == (TASK_ARG_DST_MAC_SET|TASK_ARG_SRC_MAC_SET)) {
+		/* Source and Destination mac hardcoded */
+		for (uint16_t j = 0; j < n_pkts; ++j) {
+			hdr = rte_pktmbuf_mtod(mbufs[j], struct ether_hdr *);
+               		rte_memcpy(hdr, task->src_dst_mac, sizeof(task->src_dst_mac));
+		}
+	} else {
+		for (uint16_t j = 0; j < n_pkts; ++j) {
+			hdr = rte_pktmbuf_mtod(mbufs[j], struct ether_hdr *);
+			if ((task->runtime_flags & (TASK_ARG_DO_NOT_SET_SRC_MAC|TASK_ARG_SRC_MAC_SET)) == 0) {
+				/* dst mac will be used as src mac */
+				ether_addr_copy(&hdr->d_addr, &mac);
+			}
+
+			if (task->runtime_flags & TASK_ARG_DST_MAC_SET)
+				ether_addr_copy((struct ether_addr *)&task->src_dst_mac[0], &hdr->d_addr);
+			else if ((task->runtime_flags & TASK_ARG_DO_NOT_SET_DST_MAC) == 0)
+				ether_addr_copy(&hdr->s_addr, &hdr->d_addr);
+
+			if (task->runtime_flags & TASK_ARG_SRC_MAC_SET) {
+				ether_addr_copy((struct ether_addr *)&task->src_dst_mac[6], &hdr->s_addr);
+			} else if ((task->runtime_flags & TASK_ARG_DO_NOT_SET_SRC_MAC) == 0) {
+				ether_addr_copy(&mac, &hdr->s_addr);
+			}
+		}
+	}
+	return task->base.tx_pkt(&task->base, mbufs, n_pkts, NULL);
+}
+
+static void init_task_l2fwd(struct task_base *tbase, struct task_args *targ)
+{
+	struct task_l2fwd *task = (struct task_l2fwd *)tbase;
+	struct ether_addr *src_addr, *dst_addr;
+
+	/*
+	 * Destination MAC can come from
+	 *    - pre-configured mac in case 'dst mac=xx:xx:xx:xx:xx:xx' in config file
+	 *    - src mac from the packet in case 'dst mac=packet' in config file
+	 *    - not written in case 'dst mac=no' in config file
+	 *    - (default - no 'dst mac') src mac from the packet
+	 * Source MAC can come from
+	 *    - pre-configured mac in case 'src mac=xx:xx:xx:xx:xx:xx' in config file
+	 *    - dst mac from the packet in case 'src mac=packet' in config file
+	 *    - not written in case 'src mac=no' in config file
+	 *    - (default - no 'src mac') if (tx_port) port mac
+	 *    - (default - no 'src mac') if (no tx_port) dst mac from the packet
+	 */
+
+	if (targ->flags & TASK_ARG_DST_MAC_SET) {
+		dst_addr = &targ->edaddr;
+		memcpy(&task->src_dst_mac[0], dst_addr, sizeof(*src_addr));
+	}
+
+	if (targ->flags & TASK_ARG_SRC_MAC_SET) {
+		src_addr =  &targ->esaddr;
+		memcpy(&task->src_dst_mac[6], src_addr, sizeof(*dst_addr));
+		plog_info("\t\tCore %d: src mac set from config file\n", targ->lconf->id);
+	} else if ((targ->flags & TASK_ARG_DO_NOT_SET_SRC_MAC) == 0) {
+		if (targ->nb_txports) {
+			src_addr = &prox_port_cfg[task->base.tx_params_hw.tx_port_queue[0].port].eth_addr;
+			targ->flags |= TASK_ARG_SRC_MAC_SET;
+			plog_info("\t\tCore %d: src mac set from port\n", targ->lconf->id);
+			memcpy(&task->src_dst_mac[6], src_addr, sizeof(*dst_addr));
+		}
+	}
+	task->runtime_flags = targ->flags;
+}
+
+static struct task_init task_init_l2fwd = {
+	.mode_str = "l2fwd",
+	.init = init_task_l2fwd,
+	.handle = handle_l2fwd_bulk,
+	.flag_features = TASK_FEATURE_NEVER_DISCARDS|TASK_FEATURE_TXQ_FLAGS_NOOFFLOADS|TASK_FEATURE_TXQ_FLAGS_NOMULTSEGS,
+	.size = sizeof(struct task_l2fwd),
+	.mbuf_size = 2048 + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM,
+};
+
+__attribute__((constructor)) static void reg_task_l2fwd(void)
+{
+	reg_task(&task_init_l2fwd);
+}