[dpdk-dev] [PATCH 2/7] examples/ipsec-secgw: allow to specify neighbor mac address

[Konstantin Ananyev]

In some cases it is useful to allow user to specify destination
ether address for outgoing packets.
This patch adds such ability by introducing new 'neigh' config
file option.

Signed-off-by: Konstantin Ananyev <konstantin.ananyev at intel.com>
---
 examples/ipsec-secgw/ipsec-secgw.c | 21 +++++++--
 examples/ipsec-secgw/ipsec.h       |  3 ++
 examples/ipsec-secgw/parser.c      | 75 ++++++++++++++++++++++++++++++
 examples/ipsec-secgw/parser.h      |  8 ++--
 4 files changed, 99 insertions(+), 8 deletions(-)

diff --git a/examples/ipsec-secgw/ipsec-secgw.c b/examples/ipsec-secgw/ipsec-secgw.c
index cfc2b05e5..2ed757922 100644
--- a/examples/ipsec-secgw/ipsec-secgw.c
+++ b/examples/ipsec-secgw/ipsec-secgw.c
@@ -104,9 +104,9 @@ static uint16_t nb_txd = IPSEC_SECGW_TX_DESC_DEFAULT;
 #define ETHADDR(a, b, c, d, e, f) (__BYTES_TO_UINT64(a, b, c, d, e, f, 0, 0))
 
 #define ETHADDR_TO_UINT64(addr) __BYTES_TO_UINT64( \
-		addr.addr_bytes[0], addr.addr_bytes[1], \
-		addr.addr_bytes[2], addr.addr_bytes[3], \
-		addr.addr_bytes[4], addr.addr_bytes[5], \
+		(addr)->addr_bytes[0], (addr)->addr_bytes[1], \
+		(addr)->addr_bytes[2], (addr)->addr_bytes[3], \
+		(addr)->addr_bytes[4], (addr)->addr_bytes[5], \
 		0, 0)
 
 /* port/source ethernet addr and destination ethernet addr */
@@ -1188,6 +1188,19 @@ print_ethaddr(const char *name, const struct ether_addr *eth_addr)
 	printf("%s%s", name, buf);
 }
 
+/*
+ * Update destination ethaddr for the port.
+ */
+int
+add_dst_ethaddr(uint16_t port, const struct ether_addr *addr)
+{
+	if (port > RTE_DIM(ethaddr_tbl))
+		return -EINVAL;
+
+	ethaddr_tbl[port].dst = ETHADDR_TO_UINT64(addr);
+	return 0;
+}
+
 /* Check the link status of all ports in up to 9s, and print them finally */
 static void
 check_all_ports_link_status(uint32_t port_mask)
@@ -1564,7 +1577,7 @@ port_init(uint16_t portid, uint64_t req_rx_offloads, uint64_t req_tx_offloads)
 	printf("Configuring device port %u:\n", portid);
 
 	rte_eth_macaddr_get(portid, &ethaddr);
-	ethaddr_tbl[portid].src = ETHADDR_TO_UINT64(ethaddr);
+	ethaddr_tbl[portid].src = ETHADDR_TO_UINT64(&ethaddr);
 	print_ethaddr("Address: ", &ethaddr);
 	printf("\n");
 
diff --git a/examples/ipsec-secgw/ipsec.h b/examples/ipsec-secgw/ipsec.h
index 9b1586f52..580f7876b 100644
--- a/examples/ipsec-secgw/ipsec.h
+++ b/examples/ipsec-secgw/ipsec.h
@@ -245,4 +245,7 @@ int
 sa_check_offloads(uint16_t port_id, uint64_t *rx_offloads,
 		uint64_t *tx_offloads);
 
+int
+add_dst_ethaddr(uint16_t port, const struct ether_addr *addr);
+
 #endif /* __IPSEC_H__ */
diff --git a/examples/ipsec-secgw/parser.c b/examples/ipsec-secgw/parser.c
index 91282ca94..6769a8e6d 100644
--- a/examples/ipsec-secgw/parser.c
+++ b/examples/ipsec-secgw/parser.c
@@ -306,6 +306,30 @@ parse_range(const char *token, uint16_t *low, uint16_t *high)
 	return 0;
 }
 
+#define PARSE_UINT8x16(s, v, l)	                          \
+do {                                                      \
+	char *end;                                        \
+	unsigned long t;                                  \
+	errno = 0;                                        \
+	t = strtoul((s), &end, 16);                       \
+	if (errno != 0 || end[0] != (l) || t > UINT8_MAX) \
+		return -EINVAL;                           \
+	(s) = end + 1;                                    \
+	(v) = t;                                          \
+} while (0)
+
+static int
+parse_mac(const char *str, struct ether_addr *addr)
+{
+	PARSE_UINT8x16(str, addr->addr_bytes[0], ':');
+	PARSE_UINT8x16(str, addr->addr_bytes[1], ':');
+	PARSE_UINT8x16(str, addr->addr_bytes[2], ':');
+	PARSE_UINT8x16(str, addr->addr_bytes[3], ':');
+	PARSE_UINT8x16(str, addr->addr_bytes[4], ':');
+	PARSE_UINT8x16(str, addr->addr_bytes[5], 0);
+	return 0;
+}
+
 /** sp add parse */
 struct cfg_sp_add_cfg_item {
 	cmdline_fixed_string_t sp_keyword;
@@ -444,11 +468,61 @@ cmdline_parse_inst_t cfg_rt_add_rule = {
 	},
 };
 
+/* neigh add parse */
+struct cfg_neigh_add_item {
+	cmdline_fixed_string_t neigh;
+	cmdline_fixed_string_t pstr;
+	uint16_t port;
+	cmdline_fixed_string_t mac;
+};
+
+static void
+cfg_parse_neigh(void *parsed_result, __rte_unused struct cmdline *cl,
+	void *data)
+{
+	int32_t rc;
+	struct cfg_neigh_add_item *res;
+	struct parse_status *st;
+	struct ether_addr mac;
+
+	st = data;
+	res = parsed_result;
+	rc = parse_mac(res->mac, &mac);
+	APP_CHECK(rc == 0, st, "invalid ether addr:%s", res->mac);
+	rc = add_dst_ethaddr(res->port, &mac);
+	APP_CHECK(rc == 0, st, "invalid port numer:%hu", res->port);
+	if (st->status < 0)
+		return;
+}
+
+cmdline_parse_token_string_t cfg_add_neigh_start =
+	TOKEN_STRING_INITIALIZER(struct cfg_neigh_add_item, neigh, "neigh");
+cmdline_parse_token_string_t cfg_add_neigh_pstr =
+	TOKEN_STRING_INITIALIZER(struct cfg_neigh_add_item, pstr, "port");
+cmdline_parse_token_num_t cfg_add_neigh_port =
+	TOKEN_NUM_INITIALIZER(struct cfg_neigh_add_item, port, UINT16);
+cmdline_parse_token_string_t cfg_add_neigh_mac =
+	TOKEN_STRING_INITIALIZER(struct cfg_neigh_add_item, mac, NULL);
+
+cmdline_parse_inst_t cfg_neigh_add_rule = {
+	.f = cfg_parse_neigh,
+	.data = NULL,
+	.help_str = "",
+	.tokens = {
+		(void *)&cfg_add_neigh_start,
+		(void *)&cfg_add_neigh_pstr,
+		(void *)&cfg_add_neigh_port,
+		(void *)&cfg_add_neigh_mac,
+		NULL,
+	},
+};
+
 /** set of cfg items */
 cmdline_parse_ctx_t ipsec_ctx[] = {
 	(cmdline_parse_inst_t *)&cfg_sp_add_rule,
 	(cmdline_parse_inst_t *)&cfg_sa_add_rule,
 	(cmdline_parse_inst_t *)&cfg_rt_add_rule,
+	(cmdline_parse_inst_t *)&cfg_neigh_add_rule,
 	NULL,
 };
 
@@ -474,6 +548,7 @@ parse_cfg_file(const char *cfg_filename)
 	cfg_sp_add_rule.data = &status;
 	cfg_sa_add_rule.data = &status;
 	cfg_rt_add_rule.data = &status;
+	cfg_neigh_add_rule.data = &status;
 
 	do {
 		char oneline[1024];
diff --git a/examples/ipsec-secgw/parser.h b/examples/ipsec-secgw/parser.h
index be02537c5..6b8a10076 100644
--- a/examples/ipsec-secgw/parser.h
+++ b/examples/ipsec-secgw/parser.h
@@ -14,14 +14,14 @@ struct parse_status {
 	char parse_msg[256];
 };
 
-#define	APP_CHECK(exp, status, fmt, ...)				\
+#define	APP_CHECK(exp, st, fmt, ...)					\
 do {									\
 	if (!(exp)) {							\
-		sprintf(status->parse_msg, fmt "\n",			\
+		sprintf((st)->parse_msg, fmt "\n",			\
 			## __VA_ARGS__);				\
-		status->status = -1;					\
+		(st)->status = -1;					\
 	} else								\
-		status->status = 0;					\
+		(st)->status = 0;					\
 } while (0)
 
 #define APP_CHECK_PRESENCE(val, str, status)				\
-- 
2.17.1