[dpdk-dev] [PATCH 2/2] examples/ipsec-secgw: fix portmask option parsing

[Konstantin Ananyev <konstantin.ananyev@intel.com>]

parse_portmask() returns both portmask value and possible error code
as 32-bit integer. That causes some confusion for callers.
Split error code and portmask value into two distinct variables.
Also allows to run the app with unprotected_port_mask == 0.

Fixes: d299106e8e31 ("examples/ipsec-secgw: add IPsec sample application")

Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
---
 examples/ipsec-secgw/ipsec-secgw.c | 29 +++++++++++++++--------------
 1 file changed, 15 insertions(+), 14 deletions(-)

diff --git a/examples/ipsec-secgw/ipsec-secgw.c b/examples/ipsec-secgw/ipsec-secgw.c
index fafb41161..5d7071657 100644
--- a/examples/ipsec-secgw/ipsec-secgw.c
+++ b/examples/ipsec-secgw/ipsec-secgw.c
@@ -972,20 +972,19 @@ print_usage(const char *prgname)
 }
 
 static int32_t
-parse_portmask(const char *portmask)
+parse_portmask(const char *portmask, uint32_t *pmv)
 {
-	char *end = NULL;
+	char *end;
 	unsigned long pm;
 
 	/* parse hexadecimal string */
+	errno = 0;
 	pm = strtoul(portmask, &end, 16);
-	if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
+	if (errno != 0 || *end != '\0' || pm > UINT32_MAX)
 		return -1;
 
-	if ((pm == 0) && errno)
-		return -1;
-
-	return pm;
+	*pmv = pm;
+	return 0;
 }
 
 static int32_t
@@ -1063,6 +1062,7 @@ parse_args(int32_t argc, char **argv)
 	int32_t opt, ret;
 	char **argvopt;
 	int32_t option_index;
+	uint32_t v;
 	char *prgname = argv[0];
 	int32_t f_present = 0;
 
@@ -1073,8 +1073,8 @@ parse_args(int32_t argc, char **argv)
 
 		switch (opt) {
 		case 'p':
-			enabled_port_mask = parse_portmask(optarg);
-			if (enabled_port_mask == 0) {
+			ret = parse_portmask(optarg, &enabled_port_mask);
+			if (ret < 0 || enabled_port_mask == 0) {
 				printf("invalid portmask\n");
 				print_usage(prgname);
 				return -1;
@@ -1085,8 +1085,8 @@ parse_args(int32_t argc, char **argv)
 			promiscuous_on = 1;
 			break;
 		case 'u':
-			unprotected_port_mask = parse_portmask(optarg);
-			if (unprotected_port_mask == 0) {
+			ret = parse_portmask(optarg, &unprotected_port_mask);
+			if (ret < 0) {
 				printf("invalid unprotected portmask\n");
 				print_usage(prgname);
 				return -1;
@@ -1147,15 +1147,16 @@ parse_args(int32_t argc, char **argv)
 					single_sa_idx);
 			break;
 		case CMD_LINE_OPT_CRYPTODEV_MASK_NUM:
-			ret = parse_portmask(optarg);
+			ret = parse_portmask(optarg, &v);
 			if (ret == -1) {
-				printf("Invalid argument[portmask]\n");
+				printf("Invalid argument[%s]\n",
+					CMD_LINE_OPT_CRYPTODEV_MASK);
 				print_usage(prgname);
 				return -1;
 			}
 
 			/* else */
-			enabled_cryptodev_mask = ret;
+			enabled_cryptodev_mask = v;
 			break;
 		default:
 			print_usage(prgname);
-- 
2.13.6