Allow user to override the hard coded IP address and UDP
port values in Tx only test.

Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
---
 app/test-pmd/parameters.c             | 49 +++++++++++++++++++++++++++
 app/test-pmd/testpmd.h                |  6 ++++
 app/test-pmd/txonly.c                 | 16 ++++-----
 doc/guides/testpmd_app_ug/run_app.rst |  9 +++++
 4 files changed, 72 insertions(+), 8 deletions(-)

diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
index 75807623c719..6d666e088fd9 100644
--- a/app/test-pmd/parameters.c
+++ b/app/test-pmd/parameters.c
@@ -19,6 +19,7 @@
 #include <stdint.h>
 #include <unistd.h>
 #include <inttypes.h>
+#include <arpa/inet.h>
 
 #include <rte_common.h>
 #include <rte_byteorder.h>
@@ -65,6 +66,7 @@ usage(char* progname)
 #ifdef RTE_LIBRTE_CMDLINE
               "--eth-peers-configfile= | "
               "--eth-peer=X,M:M:M:M:M:M | "
+              "--tx-ip=SRC,DST | --tx-udp=PORT | "
 #endif
               "--pkt-filter-mode= |"
               "--rss-ip | --rss-udp | "
@@ -625,6 +627,8 @@ launch_args_parse(int argc, char** argv)
                { "vxlan-gpe-port",             1, 0, 0 },
                { "mlockall",                   0, 0, 0 },
                { "no-mlockall",                0, 0, 0 },
+               { "tx-ip",                      1, 0, 0 },
+               { "tx-udp",                     1, 0, 0 },
                { 0, 0, 0, 0 },
        };
 
@@ -717,6 +721,51 @@ launch_args_parse(int argc, char** argv)
                                nb_peer_eth_addrs++;
                        }
 #endif
+                       if (!strcmp(lgopts[opt_idx].name, "tx-ip")) {
+                               struct in_addr in;
+                               char *end;
+
+                               end = strchr(optarg, ',');
+                               if (end == optarg || !end)
+                                       rte_exit(EXIT_FAILURE,
+                                                "Invalid tx-ip: %s", optarg);
+
+                               *end++ = 0;
+                               if (inet_aton(optarg, &in) == 0)
+                                       rte_exit(EXIT_FAILURE,
+                                                "Invalid source IP address: 
%s\n", optarg);
+                               tx_ip_src_addr = rte_be_to_cpu_32(in.s_addr);
+
+                               if (inet_aton(end, &in) == 0)
+                                       rte_exit(EXIT_FAILURE,
+                                                "Invalid destination IP 
address: %s\n", optarg);
+                               tx_ip_dst_addr = rte_be_to_cpu_32(in.s_addr);
+                       }
+                       if (!strcmp(lgopts[opt_idx].name, "tx-udp")) {
+                               char *end = NULL;
+
+                               errno = 0;
+                               n = strtoul(optarg, &end, 10);
+                               if (errno != 0 || end == optarg || n > 
UINT16_MAX ||
+                                   !(*end == '\0' || *end == ','))
+                                       rte_exit(EXIT_FAILURE,
+                                                "Invalid UDP port: %s\n", 
optarg);
+                               tx_udp_src_port = n;
+                               if (*end == ',') {
+                                       char *dst = end + 1;
+
+                                       n = strtoul(dst, &end, 10);
+                                       if (errno != 0 || end == dst ||
+                                           n > UINT16_MAX || *end)
+                                               rte_exit(EXIT_FAILURE,
+                                                        "Invalid destination 
UDP port: %s\n",
+                                                        dst);
+                                       tx_udp_dst_port = n;
+                               } else {
+                                       tx_udp_dst_port = n;
+                               }
+
+                       }
                        if (!strcmp(lgopts[opt_idx].name, "nb-ports")) {
                                n = atoi(optarg);
                                if (n > 0 && n <= nb_ports)
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index f51cd9dd9bbd..48f7b364e9b3 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -444,6 +444,12 @@ extern int8_t tx_pthresh;
 extern int8_t tx_hthresh;
 extern int8_t tx_wthresh;
 
+extern uint16_t tx_udp_src_port;
+extern uint16_t tx_udp_dst_port;
+
+extern uint32_t tx_ip_src_addr;
+extern uint32_t tx_ip_dst_addr;
+
 extern struct fwd_config cur_fwd_config;
 extern struct fwd_engine *cur_fwd_eng;
 extern uint32_t retry_enabled;
diff --git a/app/test-pmd/txonly.c b/app/test-pmd/txonly.c
index a24000e3af44..6d7ddf99d639 100644
--- a/app/test-pmd/txonly.c
+++ b/app/test-pmd/txonly.c
@@ -41,12 +41,12 @@
 #include "testpmd.h"
 
 /* RFC863 discard port */
-#define UDP_SRC_PORT 9
-#define UDP_DST_PORT 9
+uint16_t tx_udp_src_port = 9;
+uint16_t tx_udp_dst_port = 9;
 
 /* RFC2544 reserved test subnet 192.18.0.0 */
-#define IP_SRC_ADDR ((192U << 24) | (18 << 16) | (0 << 8) | 1)
-#define IP_DST_ADDR ((192U << 24) | (18 << 16) | (0 << 8) | 2)
+uint32_t tx_ip_src_addr = (192U << 24) | (18 << 16) | (0 << 8) | 1;
+uint32_t tx_ip_dst_addr = (192U << 24) | (18 << 16) | (0 << 8) | 2;
 
 #define IP_DEFTTL  64   /* from RFC 1340. */
 #define IP_VERSION 0x40
@@ -106,8 +106,8 @@ setup_pkt_udp_ip_headers(struct ipv4_hdr *ip_hdr,
         * Initialize UDP header.
         */
        pkt_len = (uint16_t) (pkt_data_len + sizeof(struct udp_hdr));
-       udp_hdr->src_port = rte_cpu_to_be_16(UDP_SRC_PORT);
-       udp_hdr->dst_port = rte_cpu_to_be_16(UDP_DST_PORT);
+       udp_hdr->src_port = rte_cpu_to_be_16(tx_udp_src_port);
+       udp_hdr->dst_port = rte_cpu_to_be_16(tx_udp_dst_port);
        udp_hdr->dgram_len      = RTE_CPU_TO_BE_16(pkt_len);
        udp_hdr->dgram_cksum    = 0; /* No UDP checksum. */
 
@@ -122,8 +122,8 @@ setup_pkt_udp_ip_headers(struct ipv4_hdr *ip_hdr,
        ip_hdr->next_proto_id = IPPROTO_UDP;
        ip_hdr->packet_id = 0;
        ip_hdr->total_length   = RTE_CPU_TO_BE_16(pkt_len);
-       ip_hdr->src_addr = rte_cpu_to_be_32(IP_SRC_ADDR);
-       ip_hdr->dst_addr = rte_cpu_to_be_32(IP_DST_ADDR);
+       ip_hdr->src_addr = rte_cpu_to_be_32(tx_ip_src_addr);
+       ip_hdr->dst_addr = rte_cpu_to_be_32(tx_ip_dst_addr);
 
        /*
         * Compute IP header checksum.
diff --git a/doc/guides/testpmd_app_ug/run_app.rst 
b/doc/guides/testpmd_app_ug/run_app.rst
index f301c2b6f709..ae9eb712e209 100644
--- a/doc/guides/testpmd_app_ug/run_app.rst
+++ b/doc/guides/testpmd_app_ug/run_app.rst
@@ -249,6 +249,15 @@ The commandline options are:
     Set the MAC address ``XX:XX:XX:XX:XX:XX`` of the peer port N,
     where 0 <= N < ``CONFIG_RTE_MAX_ETHPORTS`` from the configuration file.
 
+
+*   ``--tx-ip=SRC,DST``
+    Set the source and destination IP address used when doing transmit only 
test.
+    The defaults are source 192.18.0.1 and destination 192.18.0.2.
+
+*   ``--tx-udp=SRC[,DST]``
+    Set the source and destination UDP port number for transmit test only test.
+    The default port is the 9 (discard).
+
 *   ``--pkt-filter-mode=mode``
 
     Set Flow Director mode where mode is either ``none`` (the default), 
``signature`` or ``perfect``.
-- 
2.17.1

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