| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <nanomsg/nn.h> |
| #include <nanomsg/pipeline.h> |
| |
| #define NODE0 "node0" |
| #define NODE1 "node1" |
| |
| void |
| fatal(const char *func) |
| { |
| fprintf(stderr, "%s: %s\n", func, nn_strerror(nn_errno())); |
| exit(1); |
| } |
| |
| int |
| node0(const char *url) |
| { |
| int sock; |
| int rv; |
| |
| if ((sock = nn_socket(AF_SP, NN_PULL)) < 0) { |
| fatal("nn_socket"); |
| } |
| if ((rv = nn_bind(sock, url)) < 0) { |
| fatal("nn_bind"); |
| } |
| for (;;) { |
| char *buf = NULL; |
| int bytes; |
| if ((bytes = nn_recv(sock, &buf, NN_MSG, 0)) < 0) { |
| fatal("nn_recv"); |
| } |
| printf("NODE0: RECEIVED \"%s\"\n", buf); // <1> |
| nn_freemsg(buf); |
| } |
| } |
| |
| int |
| node1(const char *url, const char *msg) |
| { |
| int sz_msg = strlen(msg) + 1; // '\0' too |
| int sock; |
| int rv; |
| int bytes; |
| |
| if ((sock = nn_socket(AF_SP, NN_PUSH)) < 0) { |
| fatal("nn_socket"); |
| } |
| if ((rv = nn_connect(sock, url)) < 0) { |
| fatal("nn_connect"); |
| } |
| printf("NODE1: SENDING \"%s\"\n", msg); |
| if ((bytes = nn_send(sock, msg, sz_msg, 0)) < 0) { |
| fatal("nn_send"); |
| } |
| sleep(1); // wait for messages to flush before shutting down |
| return (nn_shutdown(sock, 0)); |
| } |
| |
| int |
| main(const int argc, const char **argv) |
| { |
| if ((argc > 1) && (strcmp(NODE0, argv[1]) == 0)) |
| return (node0(argv[2])); |
| |
| if ((argc > 2) && (strcmp(NODE1, argv[1]) == 0)) |
| return (node1(argv[2], argv[3])); |
| |
| fprintf(stderr, "Usage: pipeline %s|%s <URL> <ARG> ...'\n", |
| NODE0, NODE1); |
| return (1); |
| } |