apps/irc/net.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *  Copyright (C) 2009  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   5  *
   6  *  This program is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <sys/socket.h>
  26 #include <netinet/in.h>
  27 #include <arpa/inet.h>
  28 #include <netdb.h>
  29 #include <fcntl.h>
  30 #include <time.h>
  31 #include "proto.h"
  32 #include "net.h"
  33
  34 int fd;
  35 static struct sockaddr_in serverSock;
  36 static struct sockaddr_in6 serverSock6;
  37 static struct hostent *host;
  38
  39 char *buf;
  40
  41 /** Network Send function */
  42 int net_send (char *buf, unsigned len)
  43 {
  44         int ret = send (fd, buf, len, 0);
  45 #ifndef LINUX
  46         schedule ();
  47 #endif
  48         return ret;
  49 }
  50
  51 unsigned strlenn (char *str, unsigned len)
  52 {
  53         unsigned i = len;
  54
  55         while (str[i] != '\n') {
  56                 i --;
  57
  58                 if (!i)
  59                         return 0;
  60
  61                 return i+1;
  62         }
  63
  64         return 0;
  65 }
  66
  67 int net_loop ()
  68 {
  69         int ret = recv (fd, buf, BUFSIZE-1, 0);
  70
  71         if (ret > 0) {
  72                 buf[ret] = '\0';
  73
  74                 //printf ("net_loop () -> recv (): '%s' : %d\n", buf, ret);
  75
  76                 if (!proto_handler (buf, ret)) {
  77                         printf ("ERROR -> proto_handler () failed\n");
  78                         return 0;
  79                 }
  80         } else {
  81 #ifdef LINUX
  82                 if (ret == 0) {
  83 #else
  84                 if (ret == -1) {
  85 #endif
  86                         printf ("INFO -> Connection closed by server\n");
  87                         return 0;
  88                 }
  89         }
  90
  91         usleep (60);
  92
  93         return 1;
  94 }
  95
  96 int net_close ()
  97 {
  98         close (fd);
  99
 100         printf ("net_close () -> close (%d)\n", fd);
 101
 102         return 1;
 103 }
 104
 105 int init_net (char *address, int port, int flags)
 106 {
 107         int proto = AF_INET;
 108
 109         if (flags & NET_IPV6)
 110                 proto = AF_INET6;
 111
 112         if ((host = gethostbyname ((char *) address)) == NULL) {
 113                 printf ("Wrong address -> %s:%d\n", address, port);
 114                 return 0;
 115         }
 116
 117         if ((fd = socket (proto, SOCK_STREAM, IPPROTO_TCP)) == -1) {
 118                 printf ("Cant create socket\n");
 119                 return 0;
 120         }
 121
 122         if (flags & NET_IPV6) {
 123                 serverSock6.sin6_family = proto;
 124                 serverSock6.sin6_port = htons (port);
 125                 memcpy (&(serverSock6.sin6_addr), host->h_addr, host->h_length);
 126
 127                 if (connect (fd, (struct sockaddr *) &serverSock6, sizeof (serverSock6)) == -1) {
 128                         printf ("Connection cant be estabilished -> %s:%d\n", address, port);
 129                         return 0;
 130                 }
 131         } else {
 132                 serverSock.sin_family = proto;
 133                 serverSock.sin_port = htons (port);
 134                 memcpy (&(serverSock.sin_addr), host->h_addr, host->h_length);
 135
 136                 if (connect (fd, (struct sockaddr *) &serverSock, sizeof (serverSock)) == -1) {
 137                         printf ("Connection cant be estabilished -> %s:%d\n", address, port);
 138                         return 0;
 139                 }
 140         }
 141
 142         int oldFlag = fcntl (fd, F_GETFL, 0);
 143         if (fcntl (fd, F_SETFL, oldFlag | O_NONBLOCK) == -1) {
 144                 printf ("Cant set socket to nonblocking mode\n");
 145                 return 0;
 146         }
 147
 148         buf = (char *) malloc (sizeof (char) * BUFSIZE);
 149
 150         if (!buf) {
 151                 printf ("Receive buffer -> out of memory !\n");
 152                 return 0;
 153         }
 154
 155         return 1;
 156 }