server.c

   1 #include "server.h"
   2 #include <stdio.h>
   3 #include <unistd.h>
   4
   5 int resolve(const char *host, unsigned short port, struct addrinfo** addr) {
   6         struct addrinfo hints = {
   7                 .ai_family = AF_UNSPEC,
   8                 .ai_socktype = SOCK_STREAM,
   9                 .ai_flags = AI_PASSIVE,
  10         };
  11         char port_buf[8];
  12         snprintf(port_buf, sizeof port_buf, "%u", port);
  13         return getaddrinfo(host, port_buf, &hints, addr);
  14 }
  15
  16 int server_waitclient(struct server *server, struct client* client) {
  17         socklen_t clen = sizeof client->addr;
  18         return ((client->fd = accept(server->fd, (void*)&client->addr, &clen)) == -1)*-1;
  19 }
  20
  21 int server_setup(struct server *server, const char* listenip, unsigned short port) {
  22         struct addrinfo *ainfo = 0;
  23         if(resolve(listenip, port, &ainfo)) return -1;
  24         struct addrinfo* p;
  25         int listenfd;
  26         for(p = ainfo; p; p = p->ai_next) {
  27                 if((listenfd = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) < 0)
  28                         continue;
  29                 int yes = 1;
  30                 setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
  31                 if(bind(listenfd, p->ai_addr, p->ai_addrlen) < 0) {
  32                         close(listenfd);
  33                         listenfd = -1;
  34                         continue;
  35                 }
  36                 break;
  37         }
  38         if(listenfd < 0) return -2;
  39         freeaddrinfo(ainfo);
  40         if(listen(listenfd, SOMAXCONN) < 0) {
  41                 close(listenfd);
  42                 return -3;
  43         }
  44         server->fd = listenfd;
  45         return 0;
  46 }