example: generator: add configuration option for csum support

Add configuration option to enable platform checksum support
(if available) for calculation and validation. By default,
checksum calculation is performed in software and validation
is disabled.

Signed-off-by: Bogdan Pricope <bogdan.pricope@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>

1 files changed, 29 insertions, 9 deletions

diff --git a/example/generator/odp_generator.c b/example/generator/odp_generator.c
index 47b91d6ef..0a81cdeb3 100644
--- a/example/generator/odp_generator.c
+++ b/example/generator/odp_generator.c
@@ -76,6 +76,7 @@ typedef struct {
 				     each packet */
 	int udp_tx_burst;	/**< number of udp packets to send with one
 				      API call */
+	odp_bool_t csum;	/**< use platform csum support if available */
 } appl_args_t;
 
 /**
@@ -516,14 +517,26 @@ static int create_pktio(const char *dev, odp_pool_t pool,
 		return -1;
 	}
 	odp_pktio_config_init(&itf->config);
-	itf->config.pktin.bit.ipv4_chksum = capa.config.pktin.bit.ipv4_chksum;
-	itf->config.pktin.bit.udp_chksum = capa.config.pktin.bit.udp_chksum;
-	itf->config.pktin.bit.drop_ipv4_err =
-		capa.config.pktin.bit.drop_ipv4_err;
-	itf->config.pktin.bit.drop_udp_err = capa.config.pktin.bit.drop_udp_err;
-
-	itf->config.pktout.bit.ipv4_chksum = capa.config.pktout.bit.ipv4_chksum;
-	itf->config.pktout.bit.udp_chksum = capa.config.pktout.bit.udp_chksum;
+	if (args->appl.csum) {
+		itf->config.pktin.bit.ipv4_chksum =
+			capa.config.pktin.bit.ipv4_chksum;
+		itf->config.pktin.bit.udp_chksum =
+			capa.config.pktin.bit.udp_chksum;
+		itf->config.pktin.bit.drop_ipv4_err =
+			capa.config.pktin.bit.drop_ipv4_err;
+		itf->config.pktin.bit.drop_udp_err =
+			capa.config.pktin.bit.drop_udp_err;
+
+		itf->config.pktout.bit.ipv4_chksum =
+			capa.config.pktout.bit.ipv4_chksum;
+		itf->config.pktout.bit.udp_chksum =
+			capa.config.pktout.bit.udp_chksum;
+	} else { /* explicit disable */
+		itf->config.pktin.bit.ipv4_chksum = 0;
+		itf->config.pktin.bit.udp_chksum = 0;
+		itf->config.pktout.bit.ipv4_chksum = 0;
+		itf->config.pktout.bit.udp_chksum = 0;
+	}
 
 	if (odp_pktio_config(itf->pktio, &itf->config)) {
 		EXAMPLE_ERR("Error: Failed to set interface configuration %s\n",
@@ -1299,10 +1312,11 @@ static void parse_args(int argc, char *argv[], appl_args_t *appl_args)
 		{"interval", required_argument, NULL, 'i'},
 		{"help", no_argument, NULL, 'h'},
 		{"udp_tx_burst", required_argument, NULL, 'x'},
+		{"csum", no_argument, NULL, 'y'},
 		{NULL, 0, NULL, 0}
 	};
 
-	static const char *shortopts = "+I:a:b:s:d:p:i:m:n:t:w:c:x:he:f:";
+	static const char *shortopts = "+I:a:b:s:d:p:i:m:n:t:w:c:x:he:f:y";
 
 	/* let helper collect its own arguments (e.g. --odph_proc) */
 	odph_parse_options(argc, argv, shortopts, longopts);
@@ -1315,6 +1329,7 @@ static void parse_args(int argc, char *argv[], appl_args_t *appl_args)
 	appl_args->udp_tx_burst = DEFAULT_UDP_TX_BURST;
 	appl_args->srcport = 0;
 	appl_args->dstport = 0;
+	appl_args->csum = 0;
 
 	opterr = 0; /* do not issue errors on helper options */
 
@@ -1455,6 +1470,9 @@ static void parse_args(int argc, char *argv[], appl_args_t *appl_args)
 			}
 			break;
 
+		case 'y':
+			appl_args->csum = 1;
+			break;
 		case 'h':
 			usage(argv[0]);
 			exit(EXIT_SUCCESS);
@@ -1541,6 +1559,8 @@ static void usage(char *progname)
 	       "  -n, --count the number of packets to be send\n"
 	       "  -c, --cpumask to set on cores\n"
 	       "  -x, --udp_tx_burst size of UDP TX burst\n"
+	       "  -y, --csum use platform checksum support if available\n"
+	       "	         default is disabled\n"
 	       "\n", NO_PATH(progname), NO_PATH(progname)
 	      );
 }