package/fonera-mp3/src/lib/mp3_nix_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
  23 #include <sys/socket.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <unistd.h>
  27 #include <string.h>
  28 #include <sys/socket.h>
  29 #include <sys/un.h>
  30 #include <sys/poll.h>
  31 #include <stdarg.h>
  32 #include <fcntl.h>
  33 #include "mp3.h"
  34
  35 #define SOCKET_PATH "/tmp/foxmp3"
  36
  37 typedef struct _MP3_NIX_SOCKET {
  38         fd_set master;
  39         fd_set clients;
  40         int max;
  41         int listener;
  42 } MP3_NIX_SOCKET;
  43
  44 static MP3_NIX_SOCKET mp3_nix_socket;
  45
  46 int mp3_nix_socket_setup(void){
  47         struct sockaddr_un myaddr;
  48         int yes=1;
  49         int len;
  50         FD_ZERO(&mp3_nix_socket.master);
  51         FD_ZERO(&mp3_nix_socket.clients);
  52
  53         if ((mp3_nix_socket.listener = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
  54                 perror("socket");
  55                 return MP3_ERROR;
  56         }
  57         if (setsockopt(mp3_nix_socket.listener, SOL_SOCKET,
  58                                 SO_REUSEADDR, &yes, sizeof(int)) == -1) {
  59                 perror("setsockopt");
  60                 return MP3_ERROR;
  61         }
  62         myaddr.sun_family = AF_UNIX;
  63         strcpy(myaddr.sun_path, SOCKET_PATH);
  64         unlink(myaddr.sun_path);
  65         len = strlen(myaddr.sun_path) + sizeof(myaddr.sun_family);
  66         if (bind(mp3_nix_socket.listener, (struct sockaddr *)&myaddr, len) == -1) {
  67                 perror("bind");
  68                 return MP3_ERROR;
  69         }
  70         if (listen(mp3_nix_socket.listener, 3) == -1) {
  71                 perror("listen");
  72                 return MP3_ERROR;
  73         }
  74         FD_SET(mp3_nix_socket.listener, &mp3_nix_socket.master);
  75         mp3_nix_socket.max = mp3_nix_socket.listener;
  76
  77         return MP3_OK;
  78 };
  79
  80 int mp3_nix_socket_handle(void){
  81         struct sockaddr_un remoteaddr;
  82         socklen_t addrlen;
  83         int i;
  84         int newfd;
  85         char buf[1024];
  86         int nbytes;
  87         char buf_out[1024];
  88         struct timeval tv;
  89
  90         tv.tv_sec = 0;
  91         tv.tv_usec = 0;
  92         mp3_nix_socket.clients = mp3_nix_socket.master;
  93
  94         if (select(mp3_nix_socket.max + 1, &mp3_nix_socket.clients,
  95                                 NULL, NULL, &tv) == -1) {
  96                 // sometimes the select is interrupted, because of the alarm signal used by the playtime counter
  97                 //perror("error whilst selecting socket");
  98                 return MP3_ERROR;
  99         }
 100         for(i = 0; i <= mp3_nix_socket.max; i++) {
 101                 if (FD_ISSET(i, &mp3_nix_socket.clients)) {
 102                         if (i == mp3_nix_socket.listener) {
 103                                 addrlen = sizeof(remoteaddr);
 104                                 if ((newfd = accept(mp3_nix_socket.listener,
 105                                                         (struct sockaddr *)&remoteaddr,
 106                                                         &addrlen)) == -1) {
 107                                         perror("error whilst accepting socket");
 108                                         return MP3_ERROR;
 109                                 } else {
 110                                         FD_SET(newfd, &mp3_nix_socket.master);
 111                                         if (newfd > mp3_nix_socket.max) {
 112                                                 mp3_nix_socket.max = newfd;
 113                                         }
 114                                         fcntl(newfd, F_SETFL, O_NONBLOCK);
 115                                         printf("New socket client on %d\n", newfd);
 116                                 }
 117                         } else {
 118                                 if ((nbytes = recv(i, buf, sizeof(buf), 0)) <= 0) {
 119                                         if (nbytes == 0) {
 120                                                 printf("selectserver: socket hung up %d\n", i);
 121                                                 close(i);
 122                                                 FD_CLR(i, &mp3_nix_socket.master);
 123                                         } else {
 124                                                 printf("error whilst receiving socket %d\n", i);
 125                                         }
 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                                 }
 134                         }
 135                 }
 136         }
 137         return MP3_OK;
 138 }
 139
 140 void mp3_nix_socket_write(unsigned char *data, ...){
 141         unsigned int i;
 142         unsigned char t[2048];
 143         va_list ap;
 144
 145         // clear possible dead sockets
 146         mp3_nix_socket_handle();
 147         memset(t, 0, 2048);
 148         va_start(ap, data);
 149         vsprintf(t, data, ap);
 150         va_end(ap);
 151         printf("Sending data --> %s\n", t);
 152         for(i = 0; i <= mp3_nix_socket.max; i++) {
 153                 if (FD_ISSET(i, &mp3_nix_socket.master)) {
 154                         if (i != mp3_nix_socket.listener) {
 155                                 printf("Sending on socket %d\n", i);
 156                                 send(i, t, strlen(t), 0);
 157                         }
 158                 }
 159         }
 160         printf("Finished sending\n");
 161 }
 162
 163 int mp3_nix_socket_cleanup(void){
 164         return MP3_OK;
 165 };
 166