#include "bipc.h" #define NODE0 "node0" #define NODE1 "node1" #define DATE "DATE" static void fatal(const char *func, int rv) { fprintf(stderr, "%s: %s\n", func, bipc_strerror(rv)); exit(1); } char * date(void) { time_t now = time(&now); struct tm *info = localtime(&now); char *text = asctime(info); text[strlen(text)-1] = '\0'; // remove '\n' return (text); } int node0(const char *url) { bipc_socket_t sock; int rv; // if ((rv = nng_rep0_open(&sock)) != 0) { // fatal("nng_rep0_open", rv); // } if ((rv = bipc_listen(&sock, url, REQ_REP)) != 0) { fatal("nng_listen", rv); } for (;;) { char *buf = NULL; size_t sz; if ((rv = bipc_recv(&sock, &buf, &sz)) != 0) { fatal("nng_recv", rv); } if ((sz == (strlen(DATE) + 1)) && (strcmp(DATE, buf) == 0)) { printf("NODE0: RECEIVED DATE REQUEST\n"); char *d = date(); printf("NODE0: SENDING DATE %s\n", d); if ((rv = bipc_send(&sock, d, strlen(d) + 1)) != 0) { fatal("nng_send", rv); } } bipc_free(buf, sz); } } int node1(const char *url) { bipc_socket_t sock; int rv; size_t sz; char *buf = NULL; // if ((rv = nng_req0_open(&sock)) != 0) { // fatal("bipc_socket_t", rv); // } if ((rv = bipc_connect(&sock, url, REQ_REP)) != 0) { fatal("nng_dial", rv); } printf("NODE1: SENDING DATE REQUEST %s\n", DATE); if ((rv = bipc_send(&sock, DATE, strlen(DATE)+1)) != 0) { fatal("nng_send", rv); } if ((rv = bipc_recv(&sock, &buf, &sz)) != 0) { fatal("nng_recv", rv); } printf("NODE1: RECEIVED DATE %s\n", buf); bipc_free(buf, sz); bipc_close(&sock); return (0); } int main(const int argc, const char **argv) { if ((argc > 1) && (strcmp(NODE0, argv[1]) == 0)) return (node0(argv[2])); if ((argc > 1) && (strcmp(NODE1, argv[1]) == 0)) return (node1(argv[2])); fprintf(stderr, "Usage: reqrep %s|%s ...\n", NODE0, NODE1); return (1); }