| 1 | /* FCE Ultra - NES/Famicom Emulator |
| 2 | * |
| 3 | * Copyright notice for this file: |
| 4 | * Copyright (C) 2002 Ben Parnell |
| 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 2 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, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | #include <sys/types.h> |
| 22 | #include <sys/socket.h> |
| 23 | #include <netinet/in.h> |
| 24 | #include <arpa/inet.h> |
| 25 | #include <stdio.h> |
| 26 | #include <unistd.h> |
| 27 | #include <netdb.h> |
| 28 | #include <errno.h> |
| 29 | |
| 30 | #ifndef socklen_t |
| 31 | #define socklen_t int |
| 32 | #endif |
| 33 | #ifdef NETWORK |
| 34 | static int Socket=-1; |
| 35 | #endif |
| 36 | #include "main.h" |
| 37 | #include "unix-netplay.h" |
| 38 | |
| 39 | char *netplayhost=0; |
| 40 | int Port=0xFCE; |
| 41 | int netplay=0; |
| 42 | |
| 43 | int FCEUD_NetworkConnect(void) |
| 44 | { |
| 45 | #ifdef NETWORK |
| 46 | struct sockaddr_in sockn; |
| 47 | int TSocket; |
| 48 | |
| 49 | memset(&sockn,0,sizeof(sockn)); |
| 50 | sockn.sin_family=AF_INET; |
| 51 | sockn.sin_port=htons(Port); |
| 52 | |
| 53 | if((TSocket=socket(AF_INET, SOCK_STREAM, 0))<0) |
| 54 | { |
| 55 | puts("Error creating socket."); |
| 56 | return(0); |
| 57 | } |
| 58 | |
| 59 | if(netplay==1) /* Be a server. */ |
| 60 | { |
| 61 | sockn.sin_addr.s_addr=INADDR_ANY; |
| 62 | if(bind(TSocket, (struct sockaddr *)&sockn, sizeof(sockn))<0) |
| 63 | { |
| 64 | close(TSocket); |
| 65 | puts("Error binding to socket."); |
| 66 | return(0); |
| 67 | } |
| 68 | if(listen(TSocket, 1)<0) |
| 69 | { |
| 70 | puts("Error listening on socket."); |
| 71 | close(TSocket); |
| 72 | return(0); |
| 73 | } |
| 74 | { |
| 75 | socklen_t len=sizeof(sockn); |
| 76 | |
| 77 | printf("Accepting connection on port %d...\n",Port); |
| 78 | if((Socket=accept(TSocket,(struct sockaddr *)&sockn,&len))<0 ) |
| 79 | { |
| 80 | puts("Error accepting a connection."); |
| 81 | close(TSocket); |
| 82 | return(0); |
| 83 | } |
| 84 | close(TSocket); |
| 85 | } |
| 86 | |
| 87 | } |
| 88 | else /* Connect as a client if not a server. */ |
| 89 | { |
| 90 | struct hostent *Host; |
| 91 | |
| 92 | if((sockn.sin_addr.s_addr=inet_addr(netplayhost))==INADDR_NONE) |
| 93 | { |
| 94 | if(!(Host=gethostbyname(netplayhost))) |
| 95 | { |
| 96 | puts("Error getting network host entry."); |
| 97 | return(0); |
| 98 | } |
| 99 | memcpy(&sockn.sin_addr,Host->h_addr,Host->h_length); |
| 100 | } |
| 101 | printf("Attempting to connect to %s...\n",netplayhost); |
| 102 | if( connect(TSocket, (struct sockaddr *)&sockn, sizeof(sockn)) <0 ) |
| 103 | { |
| 104 | puts("Error connecting to remote host."); |
| 105 | close(TSocket); |
| 106 | return(0); |
| 107 | } |
| 108 | Socket=TSocket; |
| 109 | } |
| 110 | #endif |
| 111 | return(1); |
| 112 | } |
| 113 | |
| 114 | /* 0 on failure, 1 on success, -1 if it would block and blocking is not |
| 115 | specified. |
| 116 | */ |
| 117 | |
| 118 | int FCEUD_NetworkRecvData(uint8 *data, uint32 len, int block) |
| 119 | { |
| 120 | #ifdef NETWORK |
| 121 | if(block) |
| 122 | { |
| 123 | int t; |
| 124 | uint8 temp[32]; |
| 125 | t=recv(Socket,temp,32,MSG_PEEK|MSG_DONTWAIT); |
| 126 | if(t==-1) |
| 127 | { |
| 128 | if(errno!=EAGAIN) return(0); |
| 129 | } |
| 130 | else if(t==32) |
| 131 | NoWaiting|=2; |
| 132 | else |
| 133 | NoWaiting&=~2; |
| 134 | return(recv(Socket,data,len,0)==len); |
| 135 | } |
| 136 | else |
| 137 | { |
| 138 | int t=recv(Socket,data,len,MSG_DONTWAIT); |
| 139 | if(t==-1) |
| 140 | { |
| 141 | if(errno==EAGAIN) // Would block |
| 142 | return(-1); |
| 143 | return(0); |
| 144 | } |
| 145 | return(1); |
| 146 | } |
| 147 | #else |
| 148 | return 1; |
| 149 | #endif |
| 150 | } |
| 151 | |
| 152 | /* 0 on failure, 1 on success. This function should always block. */ |
| 153 | |
| 154 | int FCEUD_NetworkSendData(uint8 *Value, uint32 len) |
| 155 | { |
| 156 | #ifdef NETWORK |
| 157 | return(send(Socket,Value,len,0)==len); |
| 158 | #else |
| 159 | return 0; |
| 160 | #endif |
| 161 | } |
| 162 | |
| 163 | void FCEUD_NetworkClose(void) |
| 164 | { |
| 165 | #ifdef NETWORK |
| 166 | if(Socket>0) |
| 167 | close(Socket); |
| 168 | Socket=-1; |
| 169 | #endif |
| 170 | } |
| 171 | |