examples/l3fwd-acl: update MAC addresses

Introduces two changes into l3fwd-acl behaviour to make
it behave in the same way as l3fwd:
- Add a command-line parameter to allow the user to specify the
  destination mac address for each ethernet port used.
- While forwarding the packet update source and destination mac
  addresses.

Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

doc/guides/rel_notes/release_20_11.rst

@@ -330,6 +330,12 @@ New Features
   * Added scatter gather support.
   * Added NIST GCMVS complaint GMAC test method support.
 
+* **Updated l3wfd-acl sample application.**
+
+  * Added new optional parameter ``--eth-dest`` for the ``l3fwd-acl`` to allow
+    the user to specify the destination mac address for each ethernet port
+    used.
+
 
 Removed Items
 -------------

doc/guides/sample_app_ug/l3_forward_access_ctrl.rst

@@ -236,7 +236,7 @@ The application has a number of command line options:
 
 ..  code-block:: console
 
-    ./build/l3fwd-acl [EAL options] -- -p PORTMASK [-P] --config(port,queue,lcore)[,(port,queue,lcore)] --rule_ipv4 FILENAME rule_ipv6 FILENAME [--scalar] [--enable-jumbo [--max-pkt-len PKTLEN]] [--no-numa]
+    ./build/l3fwd-acl [EAL options] -- -p PORTMASK [-P] --config(port,queue,lcore)[,(port,queue,lcore)] --rule_ipv4 FILENAME rule_ipv6 FILENAME [--scalar] [--enable-jumbo [--max-pkt-len PKTLEN]] [--no-numa] [--eth-dest=X,MM:MM:MM:MM:MM:MM]
 
 
 where,
@@ -260,6 +260,8 @@ where,
 
 *   --no-numa: optional, disables numa awareness
 
+*   --eth-dest=X,MM:MM:MM:MM:MM:MM: optional, ethernet destination for port X
+
 For example, consider a dual processor socket platform with 8 physical cores, where cores 0-7 and 16-23 appear on socket 0,
 while cores 8-15 and 24-31 appear on socket 1.
 

examples/l3fwd-acl/main.c

@@ -39,6 +39,9 @@
 #include <rte_string_fns.h>
 #include <rte_acl.h>
 
+#include <cmdline_parse.h>
+#include <cmdline_parse_etheraddr.h>
+
 #if RTE_LOG_DP_LEVEL >= RTE_LOG_DEBUG
 #define L3FWDACL_DEBUG
 #endif
@@ -81,9 +84,6 @@
 static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT;
 static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT;
 
-/* ethernet addresses of ports */
-static struct rte_ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
-
 /* mask of enabled ports */
 static uint32_t enabled_port_mask;
 static int promiscuous_on; /**< Ports set in promiscuous mode off by default. */
@@ -143,6 +143,9 @@ static struct rte_eth_conf port_conf = {
 
 static struct rte_mempool *pktmbuf_pool[NB_SOCKETS];
 
+/* ethernet addresses of ports */
+static struct rte_ether_hdr port_l2hdr[RTE_MAX_ETHPORTS];
+
 /***********************start of ACL part******************************/
 #ifdef DO_RFC_1812_CHECKS
 static inline int
@@ -164,6 +167,7 @@ send_single_packet(struct rte_mbuf *m, uint16_t port);
 #define OPTION_RULE_IPV4	"rule_ipv4"
 #define OPTION_RULE_IPV6	"rule_ipv6"
 #define OPTION_SCALAR		"scalar"
+#define OPTION_ETH_DEST		"eth-dest"
 #define ACL_DENY_SIGNATURE	0xf0000000
 #define RTE_LOGTYPE_L3FWDACL	RTE_LOGTYPE_USER3
 #define acl_log(format, ...)	RTE_LOG(ERR, L3FWDACL, format, ##__VA_ARGS__)
@@ -1275,9 +1279,14 @@ send_single_packet(struct rte_mbuf *m, uint16_t port)
 {
 	uint32_t lcore_id;
 	struct lcore_conf *qconf;
+	struct rte_ether_hdr *eh;
 
 	lcore_id = rte_lcore_id();
 
+	/* update src and dst mac*/
+	eh = rte_pktmbuf_mtod(m, struct rte_ether_hdr *);
+	memcpy(eh, &port_l2hdr[port], sizeof(eh->d_addr) + sizeof(eh->s_addr));
+
 	qconf = &lcore_conf[lcore_id];
 	rte_eth_tx_buffer(port, qconf->tx_queue_id[port],
 			qconf->tx_buffer[port], m);
@@ -1627,6 +1636,26 @@ parse_config(const char *q_arg)
 	return 0;
 }
 
+static const char *
+parse_eth_dest(const char *optarg)
+{
+	unsigned long portid;
+	char *port_end;
+
+	errno = 0;
+	portid = strtoul(optarg, &port_end, 0);
+	if (errno != 0 || port_end == optarg || *port_end++ != ',')
+		return "Invalid format";
+	else if (portid >= RTE_MAX_ETHPORTS)
+		return "port value exceeds RTE_MAX_ETHPORTS("
+			RTE_STR(RTE_MAX_ETHPORTS) ")";
+
+	if (cmdline_parse_etheraddr(NULL, port_end, &port_l2hdr[portid].d_addr,
+			sizeof(port_l2hdr[portid].d_addr)) < 0)
+		return "Invalid ethernet address";
+	return NULL;
+}
+
 /* Parse the argument given in the command line of the application */
 static int
 parse_args(int argc, char **argv)
@@ -1642,6 +1671,7 @@ parse_args(int argc, char **argv)
 		{OPTION_RULE_IPV4, 1, 0, 0},
 		{OPTION_RULE_IPV6, 1, 0, 0},
 		{OPTION_SCALAR, 0, 0, 0},
+		{OPTION_ETH_DEST, 1, 0, 0},
 		{NULL, 0, 0, 0}
 	};
 
@@ -1737,6 +1767,16 @@ parse_args(int argc, char **argv)
 					OPTION_SCALAR, sizeof(OPTION_SCALAR)))
 				parm_config.scalar = 1;
 
+			if (!strncmp(lgopts[option_index].name, OPTION_ETH_DEST,
+					sizeof(OPTION_ETH_DEST))) {
+				const char *serr = parse_eth_dest(optarg);
+				if (serr != NULL) {
+					printf("invalid %s value:\"%s\": %s\n",
+						OPTION_ETH_DEST, optarg, serr);
+					print_usage(prgname);
+					return -1;
+				}
+			}
 
 			break;
 
@@ -1862,6 +1902,20 @@ check_all_ports_link_status(uint32_t port_mask)
 	}
 }
 
+/*
+ * build-up default vaues for dest MACs.
+ */
+static void
+set_default_dest_mac(void)
+{
+	uint32_t i;
+
+	for (i = 0; i != RTE_DIM(port_l2hdr); i++) {
+		port_l2hdr[i].d_addr.addr_bytes[0] = RTE_ETHER_LOCAL_ADMIN_ADDR;
+		port_l2hdr[i].d_addr.addr_bytes[5] = i;
+	}
+}
+
 int
 main(int argc, char **argv)
 {
@@ -1883,6 +1937,8 @@ main(int argc, char **argv)
 	argc -= ret;
 	argv += ret;
 
+	set_default_dest_mac();
+
 	/* parse application arguments (after the EAL ones) */
 	ret = parse_args(argc, argv);
 	if (ret < 0)
@@ -1962,13 +2018,14 @@ main(int argc, char **argv)
 				"rte_eth_dev_adjust_nb_rx_tx_desc: err=%d, port=%d\n",
 				ret, portid);
 
-		ret = rte_eth_macaddr_get(portid, &ports_eth_addr[portid]);
+		ret = rte_eth_macaddr_get(portid, &port_l2hdr[portid].s_addr);
 		if (ret < 0)
 			rte_exit(EXIT_FAILURE,
 				"rte_eth_macaddr_get: err=%d, port=%d\n",
 				ret, portid);
 
-		print_ethaddr(" Address:", &ports_eth_addr[portid]);
+		print_ethaddr("Dst MAC:", &port_l2hdr[portid].d_addr);
+		print_ethaddr(", Src MAC:", &port_l2hdr[portid].s_addr);
 		printf(", ");
 
 		/* init memory */