Re: [dpdk-dev] [PATCH v5 1/3] app/testpmd: add ability to set Tx IP and UDP parameters

["Iremonger, Bernard" <bernard.iremonger@intel.com>]

Hi Stephen,

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Stephen
> Hemminger
> Sent: Tuesday, April 9, 2019 7:20 PM
> To: dev@dpdk.org
> Cc: Stephen Hemminger <stephen@networkplumber.org>
> Subject: [dpdk-dev] [PATCH v5 1/3] app/testpmd: add ability to set Tx IP and
> UDP parameters
> 
> This patch changes what testpmd uses as IP addresses when run in transmit
> only mode. The old code was using
> 192.168.0.1 -> 192.168.0.2
> but these addresses are reserved for private Internet by RFC 1918.
> 
> The new code uses 192.18.0.1 and 192.18.0.2 which are on the subnet
> reserved for performance testing by RFC 2544.
> 
> New command line option allows the user to pick any other src/dst address
> desired.
> 
> Notice: this changes the default IP address for transmit only.
> It may cause some user who has hardcoded network addresses to report a
> regression.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> ---
> v5 -- rebase to 19.05-rc1 and fix reword commit message
> 
>  app/test-pmd/parameters.c             | 49 +++++++++++++++++++++++++++
>  app/test-pmd/testpmd.h                |  6 ++++
>  app/test-pmd/txonly.c                 | 20 ++++++-----
>  doc/guides/testpmd_app_ug/run_app.rst | 12 ++++++-
>  4 files changed, 77 insertions(+), 10 deletions(-)
> 
> diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c index
> 7b6b60905dce..8b523a5c66ed 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 | "
> @@ -645,6 +647,8 @@ launch_args_parse(int argc, char** argv)
>  		{ "mlockall",			0, 0, 0 },
>  		{ "no-mlockall",		0, 0, 0 },
>  		{ "mp-alloc",			1, 0, 0 },
> +		{ "tx-ip",			1, 0, 0 },
> +		{ "tx-udp",			1, 0, 0 },
>  		{ "noisy-tx-sw-buffer-size",	1, 0, 0 },
>  		{ "noisy-tx-sw-buffer-flushtime", 1, 0, 0 },
>  		{ "noisy-lkup-memory",		1, 0, 0 },
> @@ -743,6 +747,51 @@ 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
> a45988ebc524..18d2c1ef1eaf 100644
> --- a/app/test-pmd/testpmd.h
> +++ b/app/test-pmd/testpmd.h
> @@ -443,6 +443,12 @@ 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 66e63788a25e..632d655235f0
> 100644
> --- a/app/test-pmd/txonly.c
> +++ b/app/test-pmd/txonly.c
> @@ -40,11 +40,13 @@
> 
>  #include "testpmd.h"
> 
> -#define UDP_SRC_PORT 1024
> -#define UDP_DST_PORT 1024
> +/* use RFC863 Discard Protocol */
> +uint16_t tx_udp_src_port = 9;
> +uint16_t tx_udp_dst_port = 9;
> 
> -#define IP_SRC_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 1) -#define
> IP_DST_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 2)
> +/* use RFC5735 / RFC2544 reserved network test addresses */ 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
> @@ -105,8 +107,8 @@ 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. */
> 
> @@ -121,8 +123,8 @@ 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.
> @@ -206,7 +208,7 @@ pkt_burst_prepare(struct rte_mbuf *pkt, struct
> rte_mempool *mbp,
>  		 * packet generator for developer's quick performance
>  		 * regression test.
>  		 */
> -		addr = (IP_DST_ADDR | (ip_var++ << 8)) + rte_lcore_id();
> +		addr = (tx_ip_dst_addr | (ip_var++ << 8)) + rte_lcore_id();
>  		ip_hdr->src_addr = rte_cpu_to_be_32(addr);
>  	}
>  	copy_buf_to_pkt(&pkt_udp_hdr, sizeof(pkt_udp_hdr), pkt, diff --git
> a/doc/guides/testpmd_app_ug/run_app.rst
> b/doc/guides/testpmd_app_ug/run_app.rst
> index b717b8c7b742..a72f94923210 100644
> --- a/doc/guides/testpmd_app_ug/run_app.rst
> +++ b/doc/guides/testpmd_app_ug/run_app.rst
> @@ -121,12 +121,22 @@ The commandline options are:
>         XX:XX:XX:XX:XX:02
>         ...
> 
> -
>  *   ``--eth-peer=N,XX:XX:XX:XX:XX:XX``
> 
>      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``

An extra blank line is needed here for correct formatting in the output HTML

> +    Set the source and destination IP address used when doing transmit only
> test.
> +    The defaults address values are source 192.18.0.1 and
> +    destination 192.18.0.2. These are special purpose addresses
> +    reserved for benchmakring (RFC 2544).
> +
> +*   ``--tx-udp=SRC[,DST]``

An extra blank line is needed here for correct formatting in the output HTML

> +    Set the source and destination UDP port number for transmit test only
> test.
> +    The default port is the port 9 which is defined for the discard protocol
> +    (RFC 863).
> +
>  *   ``--pkt-filter-mode=mode``
> 
>      Set Flow Director mode where mode is either ``none`` (the default),
> ``signature`` or ``perfect``.
> --
> 2.17.1

./dpdk/devtools/checkpatches.sh is showing some lines over 80 characters in parameters.c

### [dpdk-dev] [PATCH v5 1/3] app/testpmd: add ability to set Tx IP and UDP parameters

WARNING:LONG_LINE: line over 80 characters
#88: FILE: app/test-pmd/parameters.c:762:
+                                                "Invalid source IP address: %s\n", optarg);

WARNING:LONG_LINE: line over 80 characters
#93: FILE: app/test-pmd/parameters.c:767:
+                                                "Invalid destination IP address: %s\n", optarg);

WARNING:LONG_LINE: line over 80 characters
#101: FILE: app/test-pmd/parameters.c:775:
+                               if (errno != 0 || end == optarg || n > UINT16_MAX ||

WARNING:LONG_LINE: line over 80 characters
#104: FILE: app/test-pmd/parameters.c:778:
+                                                "Invalid UDP port: %s\n", optarg);

total: 0 errors, 4 warnings, 153 lines checked

Regards,

Bernard.