git.meshlink.io Git - utcp/blob - test.c

   1 #define _GNU_SOURCE
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <time.h>
   7 #include <errno.h>
   8 #include <sys/types.h>
   9 #include <sys/socket.h>
  10 #include <netdb.h>
  11 #include <poll.h>
  12
  13
  14 #include "utcp.h"
  15
  16 struct utcp_connection *c;
  17 int dir = 3;
  18 bool running = true;
  19
  20 int do_recv(struct utcp_connection *c, void *data, size_t len) {
  21         if(!data || !len) {
  22                 if(errno)
  23                         fprintf(stderr, "Error: %s\n", strerror(errno));
  24                 else {
  25                         dir &= ~2;
  26                         fprintf(stderr, "Connection closed by peer\n");
  27                 }
  28                 return 0;
  29         }
  30         return write(0, data, len);
  31 }
  32
  33 void do_accept(struct utcp_connection *nc, uint16_t port) {
  34         utcp_accept(nc, do_recv, NULL);
  35         c = nc;
  36 }
  37
  38 int do_send(struct utcp *utcp, void *data, size_t len) {
  39         int s = *(int *)utcp->priv;
  40         return send(s, data, len, MSG_DONTWAIT);
  41 }
  42
  43 int main(int argc, char *argv[]) {
  44         srand(time(NULL));
  45
  46         if(argc < 2 || argc > 3)
  47                 return 1;
  48
  49         bool server = argc == 2;
  50         bool connected = false;
  51
  52         struct addrinfo *ai;
  53         struct addrinfo hint = {
  54                 .ai_flags = server ? AI_PASSIVE : 0,
  55                 .ai_socktype = SOCK_DGRAM,
  56         };
  57
  58         getaddrinfo(server ? NULL : argv[1], server ? argv[1] : argv[2], &hint, &ai);
  59         if(!ai)
  60                 return 1;
  61
  62         int s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
  63         if(s < 0)
  64                 return 1;
  65
  66         if(server) {
  67                 if(bind(s, ai->ai_addr, ai->ai_addrlen))
  68                         return 1;
  69         } else {
  70                 if(connect(s, ai->ai_addr, ai->ai_addrlen))
  71                         return 1;
  72                 connected = true;
  73         }
  74
  75         struct utcp *u = utcp_init(server ? do_accept : NULL, NULL, do_send, &s);
  76         if(!u)
  77                 return 1;
  78
  79         if(!server)
  80                 c = utcp_connect(u, 1, do_recv, NULL);
  81
  82         struct pollfd fds[2] = {
  83                 {.fd = 0, .events = POLLIN | POLLERR | POLLHUP},
  84                 {.fd = s, .events = POLLIN | POLLERR | POLLHUP},
  85         };
  86
  87         char buf[1024];
  88
  89         while(dir) {
  90                 int r = poll(fds, 2, 1000);
  91                 if(!r) {
  92                         utcp_timeout(u);
  93                         continue;
  94                 }
  95
  96                 if(fds[0].revents) {
  97                         int len = read(0, buf, sizeof buf);
  98                         if(len <= 0) {
  99                                 fds[0].fd = -1;
 100                                 dir &= ~1;
 101                                 if(c)
 102                                         utcp_shutdown(c, SHUT_WR);
 103                                 if(len < 0)
 104                                         break;
 105                                 else
 106                                         continue;
 107                         }
 108                         if(c)
 109                                 utcp_send(c, buf, len);
 110                 }
 111
 112                 if(fds[1].revents) {
 113                         struct sockaddr_storage ss;
 114                         socklen_t sl;
 115                         int len = recvfrom(s, buf, sizeof buf, MSG_DONTWAIT, (struct sockaddr *)&ss, &sl);
 116                         if(len <= 0)
 117                                 break;
 118                         if(!connected)
 119                                 if(!connect(s, (struct sockaddr *)&ss, sl))
 120                                         connected = true;
 121                         utcp_recv(u, buf, len);
 122                 }
 123         };
 124
 125         utcp_close(c);
 126         utcp_exit(u);
 127
 128         return 0;
 129 }