| 0,0 → 1,415 |
|---|
| /* |
| Copyright (C) 1996-1997 Id Software, Inc. |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License |
| as published by the Free Software Foundation; either version 2 |
| of the License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| |
| See the GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| |
| */ |
| // net_udp.c |
| |
| #include "quakedef.h" |
| |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| #include <netdb.h> |
| #include <sys/param.h> |
| #include <sys/ioctl.h> |
| #include <errno.h> |
| |
| #ifdef __sun__ |
| #include <sys/filio.h> |
| #endif |
| |
| #ifdef NeXT |
| #include <libc.h> |
| #endif |
| |
| extern int gethostname (char *, int); |
| extern int close (int); |
| |
| extern cvar_t hostname; |
| |
| static int net_acceptsocket = -1; // socket for fielding new connections |
| static int net_controlsocket; |
| static int net_broadcastsocket = 0; |
| static struct qsockaddr broadcastaddr; |
| |
| static unsigned long myAddr; |
| |
| #include "net_udp.h" |
| |
| //============================================================================= |
| |
| int UDP_Init (void) |
| { |
| struct hostent *local; |
| char buff[MAXHOSTNAMELEN]; |
| struct qsockaddr addr; |
| char *colon; |
| |
| if (COM_CheckParm ("-noudp")) |
| return -1; |
| |
| // determine my name & address |
| gethostname(buff, MAXHOSTNAMELEN); |
| local = gethostbyname(buff); |
| myAddr = *(int *)local->h_addr_list[0]; |
| |
| // if the quake hostname isn't set, set it to the machine name |
| if (Q_strcmp(hostname.string, "UNNAMED") == 0) |
| { |
| buff[15] = 0; |
| Cvar_Set ("hostname", buff); |
| } |
| |
| if ((net_controlsocket = UDP_OpenSocket (0)) == -1) |
| Sys_Error("UDP_Init: Unable to open control socket\n"); |
| |
| ((struct sockaddr_in *)&broadcastaddr)->sin_family = AF_INET; |
| ((struct sockaddr_in *)&broadcastaddr)->sin_addr.s_addr = INADDR_BROADCAST; |
| ((struct sockaddr_in *)&broadcastaddr)->sin_port = htons(net_hostport); |
| |
| UDP_GetSocketAddr (net_controlsocket, &addr); |
| Q_strcpy(my_tcpip_address, UDP_AddrToString (&addr)); |
| colon = Q_strrchr (my_tcpip_address, ':'); |
| if (colon) |
| *colon = 0; |
| |
| Con_Printf("UDP Initialized\n"); |
| tcpipAvailable = true; |
| |
| return net_controlsocket; |
| } |
| |
| //============================================================================= |
| |
| void UDP_Shutdown (void) |
| { |
| UDP_Listen (false); |
| UDP_CloseSocket (net_controlsocket); |
| } |
| |
| //============================================================================= |
| |
| void UDP_Listen (qboolean state) |
| { |
| // enable listening |
| if (state) |
| { |
| if (net_acceptsocket != -1) |
| return; |
| if ((net_acceptsocket = UDP_OpenSocket (net_hostport)) == -1) |
| Sys_Error ("UDP_Listen: Unable to open accept socket\n"); |
| return; |
| } |
| |
| // disable listening |
| if (net_acceptsocket == -1) |
| return; |
| UDP_CloseSocket (net_acceptsocket); |
| net_acceptsocket = -1; |
| } |
| |
| //============================================================================= |
| |
| int UDP_OpenSocket (int port) |
| { |
| int newsocket; |
| struct sockaddr_in address; |
| qboolean _true = true; |
| |
| if ((newsocket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) |
| return -1; |
| |
| #if 0 |
| if (ioctl (newsocket, FIONBIO, (char *)&_true) == -1) |
| goto ErrorReturn; |
| #endif |
| address.sin_family = AF_INET; |
| address.sin_addr.s_addr = INADDR_ANY; |
| address.sin_port = htons(port); |
| if( bind (newsocket, (void *)&address, sizeof(address)) == -1) |
| goto ErrorReturn; |
| |
| return newsocket; |
| |
| ErrorReturn: |
| close (newsocket); |
| return -1; |
| } |
| |
| //============================================================================= |
| |
| int UDP_CloseSocket (int socket) |
| { |
| if (socket == net_broadcastsocket) |
| net_broadcastsocket = 0; |
| return close (socket); |
| } |
| |
| |
| //============================================================================= |
| /* |
| ============ |
| PartialIPAddress |
| |
| this lets you type only as much of the net address as required, using |
| the local network components to fill in the rest |
| ============ |
| */ |
| static int PartialIPAddress (char *in, struct qsockaddr *hostaddr) |
| { |
| char buff[256]; |
| char *b; |
| int addr; |
| int num; |
| int mask; |
| int run; |
| int port; |
| |
| buff[0] = '.'; |
| b = buff; |
| strcpy(buff+1, in); |
| if (buff[1] == '.') |
| b++; |
| |
| addr = 0; |
| mask=-1; |
| while (*b == '.') |
| { |
| b++; |
| num = 0; |
| run = 0; |
| while (!( *b < '0' || *b > '9')) |
| { |
| num = num*10 + *b++ - '0'; |
| if (++run > 3) |
| return -1; |
| } |
| if ((*b < '0' || *b > '9') && *b != '.' && *b != ':' && *b != 0) |
| return -1; |
| if (num < 0 || num > 255) |
| return -1; |
| mask<<=8; |
| addr = (addr<<8) + num; |
| } |
| |
| if (*b++ == ':') |
| port = Q_atoi(b); |
| else |
| port = net_hostport; |
| |
| hostaddr->sa_family = AF_INET; |
| ((struct sockaddr_in *)hostaddr)->sin_port = htons((short)port); |
| ((struct sockaddr_in *)hostaddr)->sin_addr.s_addr = (myAddr & htonl(mask)) | htonl(addr); |
| |
| return 0; |
| } |
| //============================================================================= |
| |
| int UDP_Connect (int socket, struct qsockaddr *addr) |
| { |
| return 0; |
| } |
| |
| //============================================================================= |
| |
| int UDP_CheckNewConnections (void) |
| { |
| unsigned long available; |
| |
| if (net_acceptsocket == -1) |
| return -1; |
| |
| if (ioctl (net_acceptsocket, FIONREAD, &available) == -1) |
| Sys_Error ("UDP: ioctlsocket (FIONREAD) failed\n"); |
| if (available) |
| return net_acceptsocket; |
| return -1; |
| } |
| |
| //============================================================================= |
| |
| int UDP_Read (int socket, byte *buf, int len, struct qsockaddr *addr) |
| { |
| int addrlen = sizeof (struct qsockaddr); |
| int ret; |
| |
| ret = recvfrom (socket, buf, len, 0, (struct sockaddr *)addr, &addrlen); |
| if (ret == -1 && (errno == EWOULDBLOCK || errno == ECONNREFUSED)) |
| return 0; |
| return ret; |
| } |
| |
| //============================================================================= |
| |
| int UDP_MakeSocketBroadcastCapable (int socket) |
| { |
| int i = 1; |
| |
| // make this socket broadcast capable |
| if (setsockopt(socket, SOL_SOCKET, SO_BROADCAST, (char *)&i, sizeof(i)) < 0) |
| return -1; |
| net_broadcastsocket = socket; |
| |
| return 0; |
| } |
| |
| //============================================================================= |
| |
| int UDP_Broadcast (int socket, byte *buf, int len) |
| { |
| int ret; |
| |
| if (socket != net_broadcastsocket) |
| { |
| if (net_broadcastsocket != 0) |
| Sys_Error("Attempted to use multiple broadcasts sockets\n"); |
| ret = UDP_MakeSocketBroadcastCapable (socket); |
| if (ret == -1) |
| { |
| Con_Printf("Unable to make socket broadcast capable\n"); |
| return ret; |
| } |
| } |
| |
| return UDP_Write (socket, buf, len, &broadcastaddr); |
| } |
| |
| //============================================================================= |
| |
| int UDP_Write (int socket, byte *buf, int len, struct qsockaddr *addr) |
| { |
| int ret; |
| |
| ret = sendto (socket, buf, len, 0, (struct sockaddr *)addr, sizeof(struct qsockaddr)); |
| if (ret == -1 && errno == EWOULDBLOCK) |
| return 0; |
| return ret; |
| } |
| |
| //============================================================================= |
| |
| char *UDP_AddrToString (struct qsockaddr *addr) |
| { |
| static char buffer[22]; |
| int haddr; |
| |
| haddr = ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr); |
| sprintf(buffer, "%d.%d.%d.%d:%d", (haddr >> 24) & 0xff, (haddr >> 16) & 0xff, (haddr >> 8) & 0xff, haddr & 0xff, ntohs(((struct sockaddr_in *)addr)->sin_port)); |
| return buffer; |
| } |
| |
| //============================================================================= |
| |
| int UDP_StringToAddr (char *string, struct qsockaddr *addr) |
| { |
| int ha1, ha2, ha3, ha4, hp; |
| int ipaddr; |
| |
| sscanf(string, "%d.%d.%d.%d:%d", &ha1, &ha2, &ha3, &ha4, &hp); |
| ipaddr = (ha1 << 24) | (ha2 << 16) | (ha3 << 8) | ha4; |
| |
| addr->sa_family = AF_INET; |
| ((struct sockaddr_in *)addr)->sin_addr.s_addr = htonl(ipaddr); |
| ((struct sockaddr_in *)addr)->sin_port = htons(hp); |
| return 0; |
| } |
| |
| //============================================================================= |
| |
| int UDP_GetSocketAddr (int socket, struct qsockaddr *addr) |
| { |
| int addrlen = sizeof(struct qsockaddr); |
| unsigned int a; |
| |
| Q_memset(addr, 0, sizeof(struct qsockaddr)); |
| getsockname(socket, (struct sockaddr *)addr, &addrlen); |
| a = ((struct sockaddr_in *)addr)->sin_addr.s_addr; |
| if (a == 0 || a == inet_addr("127.0.0.1")) |
| ((struct sockaddr_in *)addr)->sin_addr.s_addr = myAddr; |
| |
| return 0; |
| } |
| |
| //============================================================================= |
| |
| int UDP_GetNameFromAddr (struct qsockaddr *addr, char *name) |
| { |
| struct hostent *hostentry; |
| |
| hostentry = gethostbyaddr ((char *)&((struct sockaddr_in *)addr)->sin_addr, sizeof(struct in_addr), AF_INET); |
| if (hostentry) |
| { |
| Q_strncpy (name, (char *)hostentry->h_name, NET_NAMELEN - 1); |
| return 0; |
| } |
| |
| Q_strcpy (name, UDP_AddrToString (addr)); |
| return 0; |
| } |
| |
| //============================================================================= |
| |
| int UDP_GetAddrFromName(char *name, struct qsockaddr *addr) |
| { |
| struct hostent *hostentry; |
| |
| if (name[0] >= '0' && name[0] <= '9') |
| return PartialIPAddress (name, addr); |
| |
| hostentry = gethostbyname (name); |
| if (!hostentry) |
| return -1; |
| |
| addr->sa_family = AF_INET; |
| ((struct sockaddr_in *)addr)->sin_port = htons(net_hostport); |
| ((struct sockaddr_in *)addr)->sin_addr.s_addr = *(int *)hostentry->h_addr_list[0]; |
| |
| return 0; |
| } |
| |
| //============================================================================= |
| |
| int UDP_AddrCompare (struct qsockaddr *addr1, struct qsockaddr *addr2) |
| { |
| if (addr1->sa_family != addr2->sa_family) |
| return -1; |
| |
| if (((struct sockaddr_in *)addr1)->sin_addr.s_addr != ((struct sockaddr_in *)addr2)->sin_addr.s_addr) |
| return -1; |
| |
| if (((struct sockaddr_in *)addr1)->sin_port != ((struct sockaddr_in *)addr2)->sin_port) |
| return 1; |
| |
| return 0; |
| } |
| |
| //============================================================================= |
| |
| int UDP_GetSocketPort (struct qsockaddr *addr) |
| { |
| return ntohs(((struct sockaddr_in *)addr)->sin_port); |
| } |
| |
| |
| int UDP_SetSocketPort (struct qsockaddr *addr, int port) |
| { |
| ((struct sockaddr_in *)addr)->sin_port = htons(port); |
| return 0; |
| } |
| |
| //============================================================================= |