apps/im/src/net.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@gmail.com)
   4  *  Copyright (C) 2009  Tomas 'ZeXx86' Jedrzejek (zexx86@gmail.com)
   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 "platform.h"
  22 #include "config.h"
  23 #include "proto.h"
  24 #include "net.h"
  25 #include "ui.h"
  26
  27 #include <fcntl.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <unistd.h>
  32 #include <sys/socket.h>
  33 #include <errno.h>
  34 #include <netdb.h>
  35 #include <netinet/in.h>
  36 #include <arpa/inet.h>
  37 #include <sys/types.h>
  38
  39
  40 static net_t net;
  41
  42 int net_send (char *data, unsigned len)
  43 {
  44         if (!data || !len)
  45                 return -1;
  46
  47         int ret;
  48
  49         if ((ret = send (net.sock, data, len, 0)) == -1) {
  50                 printf ("ERROR -> send (%d) = -1\n", net.sock);
  51                 return -1;
  52         }
  53
  54         return ret;
  55 }
  56
  57 int net_connect (char *server, int port)
  58 {
  59         struct hostent *host;
  60
  61         /* connect to im server */
  62
  63         // Check info about remote host
  64         if ((host = gethostbyname ((char *) server)) == NULL) {
  65                 printf ("Wrong address -> %s:%d\n", server, port);
  66                 return 0;
  67         }
  68         // Create socket
  69         if ((net.sock = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
  70                 printf ("Cant create socket\n");
  71                 return 0;
  72         }
  73
  74         // Fill structure sockaddr_in
  75         // 1) Protocol family
  76         net.conn.sin_family = AF_INET;
  77         // 2) Port of remote server
  78         net.conn.sin_port = htons (port);
  79         // 3) Remote ip address
  80         memcpy (&(net.conn.sin_addr), host->h_addr, host->h_length);
  81
  82         // P�ipojen� soketu
  83         if (connect (net.sock, (struct sockaddr *) &net.conn, sizeof (net.conn)) == -1) {
  84                 printf ("Connection cant be estabilished -> %s:%d\n", server, port);
  85                 return 0;
  86         }
  87
  88         net.buffer = (char *) malloc (sizeof (char) * NET_BUFFER_SIZE);
  89
  90         if (!net.buffer)
  91                 return 0;
  92
  93         usleep (10);
  94
  95         net_switchmode ();
  96
  97         return 1;
  98 }
  99
 100 int net_switchmode ()
 101 {
 102         /* set socket "sock" to non-blocking */
 103         int oldFlag = fcntl (net.sock, F_GETFL, 0);
 104         if (fcntl (net.sock, F_SETFL, oldFlag | O_NONBLOCK) == -1) {
 105                 printf ("Cant set socket to nonblocking mode\n");
 106                 return 0;
 107         }
 108
 109         return 1;
 110 }
 111
 112 static int strnchrn (char *str, unsigned len)
 113 {
 114         unsigned l = 0;
 115
 116         while (l < len) {
 117                 if (str[l] == '\n') {
 118                         str[l] = '\0';
 119
 120                         return l;
 121                 }
 122
 123                 l ++;
 124         }
 125
 126         return 0;
 127 }
 128
 129 int net_loop ()
 130 {
 131         int ret = recv (net.sock, net.buffer, NET_BUFFER_SIZE-1, 0);
 132
 133         /* incoming data */
 134         if (ret > 0) {
 135                 int len = 0;
 136                 net.buffer[ret] = '\0';
 137
 138                 while (len < ret) {
 139                         int l = strnchrn (net.buffer+len, ret-len);
 140
 141                         if (!l)
 142                                 break;
 143
 144                         proto_handler (net.buffer+len, l);
 145
 146                         len += (l + 1);
 147                 }
 148
 149                 return 1;
 150         }
 151
 152 #ifndef __zexos__
 153         if (!ret) {
 154 #else
 155         if (ret == -1) {
 156 #endif
 157                 printf ("ERROR -> Disconnected by server\n");
 158                 return -1;
 159         }
 160
 161         ui_getcommand ();
 162
 163         usleep (40);
 164
 165 #ifdef __zexos__
 166         schedule ();
 167 #endif
 168
 169         return 0;
 170 }
 171
 172 /** INIT NETWORK function */
 173 int init_net ()
 174 {
 175         return net_connect (cfg->server, cfg->port);;
 176 }