1 // :vim ts=4 sw=4 noet:
3 ==================================================================================
4 Copyright (c) 2019 Nokia
5 Copyright (c) 2018-2019 AT&T Intellectual Property.
7 Licensed under the Apache License, Version 2.0 (the "License");
8 you may not use this file except in compliance with the License.
9 You may obtain a copy of the License at
11 http://www.apache.org/licenses/LICENSE-2.0
13 Unless required by applicable law or agreed to in writing, software
14 distributed under the License is distributed on an "AS IS" BASIS,
15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 See the License for the specific language governing permissions and
17 limitations under the License.
18 ==================================================================================
23 Abstract: This is a very simple receiver that does nothing but listen
24 for messages and write stats every so often to the tty.
26 The receiver expects messages which have some trace information
27 and a message format of:
28 ck1 ck2|<msg text><nil>
30 ck1 is a simple checksum of the message text (NOT including the
31 nil at the end of the string.
33 ck2 is a simple checksum of the trace data which for the purposes
34 of testing is assumed to have a terminating nil to keep this simple.
36 Good messages are messages where both computed checksums match
37 the ck1 and ck2 values.
39 The receiver will send an 'ack' message back to the sender for
40 all type 5 messages received.
42 The sender and receiver can be run on the same host/container
43 or on different hosts. The route table is the key to setting
44 things up properly. See the sender code for rt information.
46 Define these environment variables to have some control:
47 RMR_SEED_RT -- path to the static routing table
48 RMR_RTG_SVC -- port to listen for RTG connections
51 Author: E. Scott Daniels
63 static int sum( char* str ) {
68 sum += *(str++) + i++;
75 Split the message at the first sep and return a pointer to the first
78 static char* split( char* str, char sep ) {
81 s = strchr( str, sep );
87 fprintf( stderr, "<RCVR> no pipe in message: (%s)\n", str );
91 int main( int argc, char** argv ) {
92 void* mrc; // msg router context
93 rmr_mbuf_t* msg = NULL; // message received
97 char* listen_port = "4560";
98 long count = 0; // total received
99 long good = 0; // good palyload buffers
100 long bad = 0; // payload buffers which were not correct
101 long bad_tr = 0; // trace buffers that were not correct
102 long bad_sid = 0; // bad subscription ids
105 int nmsgs = 10; // number of messages to stop after (argv[1] overrides)
106 int rt_count = 0; // retry count
107 long ack_count = 0; // number of acks sent
108 int count_bins[11]; // histogram bins based on msg type (0-10)
109 char wbuf[1024]; // we'll pull trace data into here, and use as general working buffer
110 char sbuf[128]; // short buffer
112 data = getenv( "RMR_RTG_SVC" );
114 setenv( "RMR_RTG_SVC", "19289", 1 ); // set one that won't collide with the sender if on same host
118 nmsgs = atoi( argv[1] );
121 listen_port = argv[2];
124 memset( count_bins, 0, sizeof( count_bins ) );
126 fprintf( stderr, "<RCVR> listening on port: %s for a max of %d messages\n", listen_port, nmsgs );
128 mrc = rmr_init( listen_port, RMR_MAX_RCV_BYTES, RMRFL_NONE ); // start your engines!
130 fprintf( stderr, "<RCVR> ABORT: unable to initialise RMr\n" );
134 timeout = time( NULL ) + 20;
135 while( ! rmr_ready( mrc ) ) { // wait for RMr to load a route table
136 fprintf( stderr, "<RCVR> waiting for RMr to show ready\n" );
139 if( time( NULL ) > timeout ) {
140 fprintf( stderr, "<RCVR> giving up\n" );
144 fprintf( stderr, "<RCVR> rmr now shows ready, listening begins\n" );
146 timeout = time( NULL ) + 20;
147 while( count < nmsgs ) {
148 msg = rmr_torcv_msg( mrc, msg, 1000 ); // wait for about 1s so that if sender never starts we eventually escape
151 if( msg->state == RMR_OK ) {
152 if( (data = split( msg->payload, '|' )) != NULL ) {
153 if( sum( data ) == atoi( (char *) msg->payload ) ) {
156 fprintf( stderr, "<RCVR> chk sum bad: computed=%d expected;%d (%s)\n", sum( data ), atoi( msg->payload ), data );
161 if( (data = split( msg->payload, ' ' )) != NULL ) { // data will point to the chksum for the trace data
162 state = rmr_get_trace( msg, wbuf, 1024 ); // should only copy upto the trace size; we'll check that
163 if( state > 128 || state < 1 ) {
164 fprintf( stderr, "trace data size listed unexpectedly long: %d\n", state );
166 if( sum( wbuf ) != atoi( data ) ) {
167 fprintf( stderr, "<RCVR> trace chk sum bad: computed=%d expected;%d len=%d (%s)\n", sum( wbuf ), atoi( data ), state, wbuf );
171 count++; // messages received for stats output
173 if( msg->mtype < 3 ) { // count number of properly set subscription id
174 if( msg->sub_id != msg->mtype * 10 ) {
179 if( msg->mtype >= 0 && msg->mtype <= 10 ) {
180 count_bins[msg->mtype]++;
183 if( msg->mtype == 5 ) { // send an ack; sender will count but not process, so data in message is moot
184 msg = rmr_rts_msg( mrc, msg );
186 while( rt_count > 0 && msg != NULL && msg->state == RMR_ERR_RETRY ) { // to work right in nano we need this :(
187 if( ack_count < 1 ) { // 1st ack, so we need to connect, and we'll wait for that
191 msg = rmr_rts_msg( mrc, msg ); // we don't try to resend if this returns retry
193 if( msg && msg->state == RMR_OK ) { // if it eventually worked
200 if( time( NULL ) > timeout ) {
201 fprintf( stderr, "receiver timed out\n" );
208 for( i = 0; i < 11; i++ ) {
209 snprintf( sbuf, sizeof( sbuf ), "%6d ", count_bins[i] );
210 strcat( wbuf, sbuf );
213 fprintf( stderr, "<RCVR> mtype histogram: %s\n", wbuf );
214 fprintf( stderr, "<RCVR> [%s] %ld messages; good=%ld acked=%ld bad=%ld bad-trace=%ld bad-sub_id=%ld\n",
215 !!(errors + bad + bad_tr) ? "FAIL" : "PASS", count, good, ack_count, bad, bad_tr, bad_sid );
217 sleep( 2 ); // let any outbound acks flow before closing
220 return !!(errors + bad + bad_tr); // bad rc if any are !0