package/fonera-mp3/src/lib/mp3_tcp_socket.c

   1 /*
   2 * FOXMP3
   3 * Copyright (c) 2006 acmesystems.it - john@acmesystems.it
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License as published by
   7 * the Free Software Foundation; either version 2 of the License, or
   8 * (at your option) any later version.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA
  18 *
  19 * Feedback, Bugs...  info@acmesystems.it
  20 *
  21 */
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26 #include <string.h>
  27 #include <sys/types.h>
  28 #include <sys/socket.h>
  29 #include <netinet/in.h>
  30 #include <arpa/inet.h>
  31 #include <sys/wait.h>
  32 #include <signal.h>
  33 #include <sys/poll.h>
  34
  35 #include "mp3.h"
  36
  37 #define SOCKET_PORT     369
  38 #define BACKLOG         10
  39
  40 typedef struct _MP3_TCP_SOCKET {
  41         fd_set master;
  42         fd_set clients;
  43         int max;
  44         int listener;
  45 } MP3_TCP_SOCKET;
  46
  47 static MP3_TCP_SOCKET mp3_tcp_socket;
  48
  49 int mp3_tcp_socket_setup(void){
  50         struct sockaddr_in myaddr;
  51         int yes=1;
  52         FD_ZERO(&mp3_tcp_socket.master);
  53         FD_ZERO(&mp3_tcp_socket.clients);
  54
  55         if ((mp3_tcp_socket.listener = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
  56                 perror("socket");
  57                 return MP3_ERROR;
  58         }
  59         if (setsockopt(mp3_tcp_socket.listener, SOL_SOCKET,
  60                                 SO_REUSEADDR, &yes, sizeof(int)) == -1) {
  61                 perror("setsockopt");
  62                 return MP3_ERROR;
  63         }
  64         myaddr.sin_family = AF_INET;
  65         myaddr.sin_port = htons(SOCKET_PORT);
  66         myaddr.sin_addr.s_addr = INADDR_ANY;
  67         memset(&(myaddr.sin_zero), '\0', 8);
  68         if (bind(mp3_tcp_socket.listener, (struct sockaddr *)&myaddr, sizeof(struct sockaddr)) == -1) {
  69                 perror("bind");
  70                 return MP3_ERROR;
  71         }
  72         if (listen(mp3_tcp_socket.listener, 3) == -1) {
  73                 perror("listen");
  74                 return MP3_ERROR;
  75         }
  76         FD_SET(mp3_tcp_socket.listener, &mp3_tcp_socket.master);
  77         mp3_tcp_socket.max = mp3_tcp_socket.listener;
  78         printf("Started tcp socket on port %d\n", SOCKET_PORT);
  79         return MP3_OK;
  80 };
  81
  82 int mp3_tcp_socket_handle(void){
  83         struct sockaddr_in remoteaddr;
  84         socklen_t addrlen;
  85         int i;
  86         int newfd;
  87         char buf[1024];
  88         int nbytes;
  89         char buf_out[1024];
  90         struct timeval tv;
  91
  92         tv.tv_sec = 0;
  93         tv.tv_usec = 0;
  94         mp3_tcp_socket.clients = mp3_tcp_socket.master;
  95
  96         if (select(mp3_tcp_socket.max + 1, &mp3_tcp_socket.clients,
  97                                 NULL, NULL, &tv) == -1) {
  98                 return MP3_ERROR;
  99         }
 100         for(i = 0; i <= mp3_tcp_socket.max; i++) {
 101                 if (FD_ISSET(i, &mp3_tcp_socket.clients)) {
 102                         if (i == mp3_tcp_socket.listener) {
 103                                 addrlen = sizeof(remoteaddr);
 104                                 if ((newfd = accept(mp3_tcp_socket.listener,
 105                                                         (struct sockaddr *)&remoteaddr,
 106                                                         &addrlen)) == -1) {
 107                                         perror("error whilst accepting socket");
 108                                         return MP3_ERROR;
 109                                 } else {
 110                                         printf("New TCP connection from %s\n",
 111                                                         inet_ntoa(remoteaddr.sin_addr));
 112                                         FD_SET(newfd, &mp3_tcp_socket.master);
 113                                         if (newfd > mp3_tcp_socket.max) {
 114                                                 mp3_tcp_socket.max = newfd;
 115                                         }
 116                                 }
 117                         } else {
 118                                 if ((nbytes = recv(i, buf, sizeof(buf), 0)) <= 0) {
 119                                         if (nbytes == 0) {
 120                                                 perror("selectserver: socket hung up\n");
 121                                         } else {
 122                                                 perror("error whilst receiving socket");
 123                                         }
 124                                         close(i);
 125                                         FD_CLR(i, &mp3_tcp_socket.master);
 126                                 } else {
 127                                         buf[nbytes] = '\0';
 128                                         printf("Got data : %s\n", buf);
 129                                         mp3_parser_incoming(buf,buf_out);
 130                                         if(*buf_out != '\0'){
 131                                                 send(i, buf_out, strlen(buf_out), 0);
 132                                         }
 133                                         close(i);
 134                                         FD_CLR(i, &mp3_tcp_socket.master);
 135                                 }
 136                         }
 137                 }
 138         }
 139         return MP3_OK;
 140 };
 141
 142 int mp3_tcp_socket_cleanup(void){
 143         return MP3_OK;
 144 };
 145