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libzmq Radio/Dish example using UDP multicast
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| #include <stdlib.h> | |
| #include <assert.h> | |
| #include <stdio.h> | |
| #include <string.h> | |
| #include <signal.h> | |
| #include <unistd.h> // for usleep | |
| #define ZMQ_BUILD_DRAFT_API | |
| #include <zmq.h> | |
| volatile sig_atomic_t stop; | |
| const char *mcast_url = "udp://239.0.0.1:40000"; | |
| const char *unicast_url = "udp://127.0.0.1:40000"; | |
| void inthand(int signum) { | |
| stop = 1; | |
| } | |
| void my_free (void *data, void *hint) | |
| { | |
| free (data); | |
| } |
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| #include "test_radio_dish_udp.h" | |
| int main(int argc, char *argv[]) | |
| { | |
| void *ctx = zmq_ctx_new(); | |
| void *dish = zmq_socket(ctx, ZMQ_DISH); | |
| const char* url = NULL; | |
| if(argc > 1){ | |
| if(argv[0] == 'm'){ | |
| url = mcast_url; | |
| } else { | |
| url = unicast_url; | |
| } | |
| } | |
| printf( "Binding dish\n" ); | |
| int rc = zmq_bind(dish, url); | |
| assert(rc > -1); | |
| const char* group = "mcast_test"; | |
| printf( "Dish joining group\n" ); | |
| zmq_join(dish, group); | |
| signal(SIGINT, inthand); | |
| printf( "Waiting for dish message\n" ); | |
| while (!stop){ | |
| zmq_msg_t recv_msg; | |
| zmq_msg_init (&recv_msg); | |
| zmq_recvmsg (dish, &recv_msg, 0); | |
| printf("%s", (char*)zmq_msg_data(&recv_msg)); | |
| printf( "\n" ); | |
| zmq_msg_close (&recv_msg); | |
| } | |
| printf( "Closing"); | |
| zmq_close(dish); | |
| zmq_ctx_term(ctx); | |
| return 0; | |
| } |
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| #include "test_radio_dish_udp.h" | |
| int main(int argc, char *argv[]) | |
| { | |
| void *ctx = zmq_ctx_new(); | |
| void *radio = zmq_socket(ctx, ZMQ_RADIO); | |
| char* url = NULL; | |
| if(argc > 1){ | |
| if(argv[0] == 'm'){ | |
| url = mcast_url; | |
| } else { | |
| url = unicast_url; | |
| } | |
| } | |
| printf( "Connecting radio\n" ); | |
| int rc = zmq_connect(radio, url); | |
| assert(rc > -1); | |
| const char* group = "mcast_test"; | |
| signal(SIGINT, inthand); | |
| int message_num = 0; | |
| while (!stop){ | |
| void *data = malloc(255); | |
| memset(data, 0, sizeof(data)); | |
| sprintf(data, "%d", message_num); | |
| zmq_msg_t msg; | |
| zmq_msg_init_data (&msg, data, 255, my_free, NULL); | |
| zmq_msg_set_group(&msg, group); | |
| printf( "Sending message %d\n", message_num); | |
| zmq_sendmsg(radio, &msg, 0); | |
| message_num++; | |
| usleep(100); | |
| } | |
| printf( "Closing"); | |
| zmq_close(radio); | |
| zmq_ctx_term(ctx); | |
| return 0; | |
| } |
Author
It might be the same problem in that linked issue. I can see that the
publish socket is being set up as a radio socket, but then its being bound
instead of connecting to an endpoint.
…On Sun, Mar 27, 2022, 6:52 AM Gary Chan ***@***.***> wrote:
***@***.**** commented on this gist.
------------------------------
Very thanks a lot, I also found this strange... BTW, have you ever try
cppzmq using udp? as mentioned in zeromq/cppzmq#549
<zeromq/cppzmq#549>
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Very thanks a lot, I also found this strange... BTW, have you ever try cppzmq using udp? as mentioned in zeromq/cppzmq#549