ref: 59c7b8446575847ddf9b22b9b93a4eb58b7fe042
parent: 1e9ce0901c8439ebb3299b77690cd7cd4ccf25b0
author: Simon Howard <[email protected]>
date: Sun Oct 30 14:56:15 EST 2005
Add foundation code for the new networking system Subversion-branch: /trunk/chocolate-doom Subversion-revision: 229
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -31,8 +31,9 @@
deh_defs.h deh_frame.c deh_main.c deh_ptr.c deh_text.c deh_thing.c \
deh_io.c deh_io.h deh_ammo.c deh_cheat.c deh_weapon.c \
deh_misc.c deh_misc.h deh_sound.c deh_main.h doomfeatures.h \
-w_merge.c w_merge.h deh_mapping.c deh_mapping.h
-
+w_merge.c w_merge.h deh_mapping.c deh_mapping.h \
+net_defs.h net_io.h net_loop.h net_packet.h net_sdl.h \
+net_io.c net_loop.c net_packet.c net_sdl.c
if HAVE_WINDRES
chocolate_doom_SOURCES=$(SOURCE_FILES) chocolate-doom-res.rc
--- /dev/null
+++ b/src/net_defs.h
@@ -1,0 +1,93 @@
+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// $Id: net_defs.h 229 2005-10-30 19:56:15Z fraggle $
+//
+// Copyright(C) 2005 Simon Howard
+//
+// 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.
+//
+// $Log$
+// Revision 1.1 2005/10/30 19:56:15 fraggle
+// Add foundation code for the new networking system
+//
+//
+// DESCRIPTION:
+// Definitions for use in networking code.
+//
+//-----------------------------------------------------------------------------
+
+#ifndef NET_DEFS_H
+#define NET_DEFS_H
+
+#include "doomtype.h"
+
+typedef struct _net_module_s net_module_t;
+typedef struct _net_packet_s net_packet_t;
+typedef struct _net_addr_s net_addr_t;
+typedef struct _net_context_s net_context_t;
+
+struct _net_packet_s
+{+ byte *data;
+ int len;
+ int alloced;
+ int pos;
+};
+
+struct _net_module_s
+{+ // Initialise this module for use as a client
+
+ boolean (*InitClient)(void);
+
+ // Initialise this module for use as a server
+
+ boolean (*InitServer)(void);
+
+ // Send a packet
+
+ void (*SendPacket)(net_addr_t *addr, net_packet_t *packet);
+
+ // Check for new packets to receive
+ //
+ // Returns true if packet received
+
+ boolean (*RecvPacket)(net_addr_t **addr, net_packet_t **packet);
+
+ // Converts an address to a string
+
+ void (*AddrToString)(net_addr_t *addr, char *buffer, int buffer_len);
+
+ // Free back an address when no longer in use
+
+ void (*FreeAddress)(net_addr_t *addr);
+
+ // Try to resolve a name to an address
+
+ net_addr_t *(*ResolveAddress)(char *addr);
+};
+
+// net_addr_t
+
+struct _net_addr_s
+{+ net_module_t *module;
+ void *handle;
+};
+
+#endif /* #ifndef NET_DEFS_H */
+
--- /dev/null
+++ b/src/net_io.c
@@ -1,0 +1,122 @@
+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// $Id: net_io.c 229 2005-10-30 19:56:15Z fraggle $
+//
+// Copyright(C) 2005 Simon Howard
+//
+// 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.
+//
+// $Log$
+// Revision 1.1 2005/10/30 19:56:15 fraggle
+// Add foundation code for the new networking system
+//
+//
+// DESCRIPTION:
+// Network packet I/O. Base layer for sending/receiving packets,
+// through the network module system
+//
+//-----------------------------------------------------------------------------
+
+#include "i_system.h"
+#include "net_defs.h"
+#include "net_io.h"
+#include "z_zone.h"
+
+#define MAX_MODULES 16
+
+struct _net_context_s
+{+ net_module_t *modules[MAX_MODULES];
+ int num_modules;
+};
+
+net_context_t *NET_NewContext(void)
+{+ net_context_t *context;
+
+ context = Z_Malloc(sizeof(net_context_t), PU_STATIC, 0);
+ context->num_modules = 0;
+
+ return context;
+}
+
+void NET_AddModule(net_context_t *context, net_module_t *module)
+{+ if (context->num_modules >= MAX_MODULES)
+ {+ I_Error("NET_AddModule: No more modules for context");+ }
+
+ context->modules[context->num_modules] = module;
+ ++context->num_modules;
+}
+
+net_addr_t *NET_ResolveAddress(net_context_t *context, char *addr)
+{+ int i;
+ net_addr_t *result;
+
+ result = NULL;
+
+ for (i=0; i<context->num_modules; ++i)
+ {+ result = context->modules[i]->ResolveAddress(addr);
+
+ if (result != NULL)
+ {+ break;
+ }
+ }
+
+ return result;
+}
+
+void NET_SendPacket(net_addr_t *addr, net_packet_t *packet)
+{+ addr->module->SendPacket(addr, packet);
+}
+
+boolean NET_RecvPacket(net_context_t *context,
+ net_addr_t **addr,
+ net_packet_t **packet)
+{+ int i;
+
+ // check all modules for new packets
+
+ for (i=0; i<context->num_modules; ++i)
+ {+ if (context->modules[i]->RecvPacket(addr, packet))
+ {+ return true;
+ }
+ }
+
+ return false;
+}
+
+void NET_AddrToString(net_addr_t *addr, char *buffer, int buffer_len)
+{+ addr->module->AddrToString(addr, buffer, buffer_len);
+}
+
+void NET_FreeAddress(net_addr_t *addr)
+{+ addr->module->FreeAddress(addr);
+}
+
+
--- /dev/null
+++ b/src/net_io.h
@@ -1,0 +1,48 @@
+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// $Id: net_io.h 229 2005-10-30 19:56:15Z fraggle $
+//
+// Copyright(C) 2005 Simon Howard
+//
+// 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.
+//
+// $Log$
+// Revision 1.1 2005/10/30 19:56:15 fraggle
+// Add foundation code for the new networking system
+//
+//
+// DESCRIPTION:
+// Network packet manipulation (net_packet_t)
+//
+//-----------------------------------------------------------------------------
+
+#ifndef NET_IO_H
+#define NET_IO_H
+
+#include "net_defs.h"
+
+net_context_t *NET_NewContext(void);
+void NET_AddModule(net_context_t *context, net_module_t *module);
+void NET_SendPacket(net_addr_t *addr, net_packet_t *packet);
+boolean NET_RecvPacket(net_context_t *context, net_addr_t **addr,
+ net_packet_t **packet);
+void NET_AddrToString(net_addr_t *addr, char *buffer, int buffer_len);
+void NET_FreeAddress(net_addr_t *addr);
+net_addr_t *NET_ResolveAddress(net_context_t *context, char *address);
+
+#endif /* #ifndef NET_IO_H */
+
--- /dev/null
+++ b/src/net_loop.c
@@ -1,0 +1,227 @@
+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// $Id: net_loop.c 229 2005-10-30 19:56:15Z fraggle $
+//
+// Copyright(C) 2005 Simon Howard
+//
+// 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.
+//
+// $Log$
+// Revision 1.1 2005/10/30 19:56:15 fraggle
+// Add foundation code for the new networking system
+//
+//
+// DESCRIPTION:
+// Loopback network module for server compiled into the client
+//
+//-----------------------------------------------------------------------------
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "i_system.h"
+#include "net_defs.h"
+#include "net_loop.h"
+#include "net_packet.h"
+
+#define MAX_QUEUE_SIZE 16
+
+typedef struct
+{+ net_packet_t *packets[MAX_QUEUE_SIZE];
+ int head, tail;
+} packet_queue_t;
+
+static packet_queue_t client_queue;
+static packet_queue_t server_queue;
+static net_addr_t client_addr;
+static net_addr_t server_addr;
+
+static void QueueInit(packet_queue_t *queue)
+{+ queue->head = queue->tail = 0;
+}
+
+static void QueuePush(packet_queue_t *queue, net_packet_t *packet)
+{+ int new_tail;
+
+ new_tail = (queue->tail + 1) % MAX_QUEUE_SIZE;
+
+ if (new_tail == queue->head)
+ {+ // queue is full
+
+ return;
+ }
+
+ queue->packets[queue->tail] = packet;
+ queue->tail = new_tail;
+}
+
+static net_packet_t *QueuePop(packet_queue_t *queue)
+{+ net_packet_t *packet;
+
+ if (queue->tail == queue->head)
+ {+ // queue empty
+
+ return NULL;
+ }
+
+ packet = queue->packets[queue->head];
+ queue->head = (queue->head + 1) % MAX_QUEUE_SIZE;
+
+ return packet;
+}
+
+//-----------------------------------------------------------------------------
+//
+// Client end code
+//
+//-----------------------------------------------------------------------------
+
+static boolean NET_CL_InitClient(void)
+{+ QueueInit(&client_queue);
+ client_addr.module = &net_loop_client_module;
+
+ return true;
+}
+
+static boolean NET_CL_InitServer(void)
+{+ I_Error("NET_CL_InitServer: attempted to initialise client pipe end as a server!");+ return false;
+}
+
+static void NET_CL_SendPacket(net_addr_t *addr, net_packet_t *packet)
+{+ QueuePush(&server_queue, NET_PacketDup(packet));
+}
+
+static boolean NET_CL_RecvPacket(net_addr_t **addr, net_packet_t **packet)
+{+ net_packet_t *popped;
+
+ popped = QueuePop(&client_queue);
+
+ if (popped != NULL)
+ {+ *packet = popped;
+ *addr = &client_addr;
+
+ return true;
+ }
+
+ return false;
+}
+
+static void NET_CL_AddrToString(net_addr_t *addr, char *buffer, int buffer_len)
+{+ snprintf(buffer, buffer_len, "local server");
+}
+
+static void NET_CL_FreeAddress(net_addr_t *addr)
+{+}
+
+static net_addr_t *NET_CL_ResolveAddress(char *address)
+{+ return &client_addr;
+}
+
+net_module_t net_loop_client_module =
+{+ NET_CL_InitClient,
+ NET_CL_InitServer,
+ NET_CL_SendPacket,
+ NET_CL_RecvPacket,
+ NET_CL_AddrToString,
+ NET_CL_FreeAddress,
+ NET_CL_ResolveAddress,
+};
+
+//-----------------------------------------------------------------------------
+//
+// Server end code
+//
+//-----------------------------------------------------------------------------
+
+static boolean NET_SV_InitClient(void)
+{+ I_Error("NET_SV_InitClient: attempted to initialise server pipe end as a client!");+ return false;
+}
+
+static boolean NET_SV_InitServer(void)
+{+ QueueInit(&server_queue);
+ server_addr.module = &net_loop_server_module;
+
+ return true;
+}
+
+static void NET_SV_SendPacket(net_addr_t *addr, net_packet_t *packet)
+{+ QueuePush(&client_queue, NET_PacketDup(packet));
+}
+
+static boolean NET_SV_RecvPacket(net_addr_t **addr, net_packet_t **packet)
+{+ net_packet_t *popped;
+
+ popped = QueuePop(&server_queue);
+
+ if (popped != NULL)
+ {+ *packet = popped;
+ *addr = &server_addr;
+
+ return true;
+ }
+
+ return false;
+}
+
+static void NET_SV_AddrToString(net_addr_t *addr, char *buffer, int buffer_len)
+{+ snprintf(buffer, buffer_len, "local client");
+}
+
+static void NET_SV_FreeAddress(net_addr_t *addr)
+{+}
+
+static net_addr_t *NET_SV_ResolveAddress(char *address)
+{+ return &server_addr;
+}
+
+net_module_t net_loop_server_module =
+{+ NET_SV_InitClient,
+ NET_SV_InitServer,
+ NET_SV_SendPacket,
+ NET_SV_RecvPacket,
+ NET_SV_AddrToString,
+ NET_SV_FreeAddress,
+ NET_SV_ResolveAddress,
+};
+
+
--- /dev/null
+++ b/src/net_loop.h
@@ -1,0 +1,42 @@
+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// $Id: net_loop.h 229 2005-10-30 19:56:15Z fraggle $
+//
+// Copyright(C) 2005 Simon Howard
+//
+// 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.
+//
+// $Log$
+// Revision 1.1 2005/10/30 19:56:15 fraggle
+// Add foundation code for the new networking system
+//
+//
+// DESCRIPTION:
+// Loopback network module for server compiled into the client
+//
+//-----------------------------------------------------------------------------
+
+#ifndef NET_LOOP_H
+#define NET_LOOP_H
+
+#include "net_defs.h"
+
+extern net_module_t net_loop_client_module;
+extern net_module_t net_loop_server_module;
+
+#endif /* #ifndef NET_LOOP_H */
+
--- /dev/null
+++ b/src/net_packet.c
@@ -1,0 +1,190 @@
+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// $Id: net_packet.c 229 2005-10-30 19:56:15Z fraggle $
+//
+// Copyright(C) 2005 Simon Howard
+//
+// 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.
+//
+// $Log$
+// Revision 1.1 2005/10/30 19:56:15 fraggle
+// Add foundation code for the new networking system
+//
+//
+// DESCRIPTION:
+// Network packet manipulation (net_packet_t)
+//
+//-----------------------------------------------------------------------------
+
+#include <string.h>
+#include "net_packet.h"
+#include "z_zone.h"
+
+net_packet_t *NET_NewPacket(int initial_size)
+{+ net_packet_t *packet;
+
+ packet = (net_packet_t *) Z_Malloc(sizeof(net_packet_t), PU_STATIC, 0);
+
+ if (initial_size == 0)
+ initial_size = 256;
+
+ packet->alloced = initial_size;
+ packet->data = Z_Malloc(initial_size, PU_STATIC, 0);
+ packet->len = 0;
+ packet->pos = 0;
+
+ return packet;
+}
+
+// duplicates an existing packet
+
+net_packet_t *NET_PacketDup(net_packet_t *packet)
+{+ net_packet_t *newpacket;
+
+ newpacket = NET_NewPacket(packet->len);
+ memcpy(newpacket->data, packet->data, packet->len);
+ newpacket->len = packet->len;
+
+ return newpacket;
+}
+
+void NET_FreePacket(net_packet_t *packet)
+{+ Z_Free(packet->data);
+ Z_Free(packet);
+}
+
+// Read a byte from the packet, returning true if read
+// successfully
+
+boolean NET_ReadInt8(net_packet_t *packet, unsigned int *data)
+{+ if (packet->pos + 1 > packet->len)
+ return false;
+
+ *data = packet->data[packet->pos];
+
+ packet->pos += 1;
+
+ return true;
+}
+
+// Read a 16-bit integer from the packet, returning true if read
+// successfully
+
+boolean NET_ReadInt16(net_packet_t *packet, unsigned int *data)
+{+ byte *p;
+
+ if (packet->pos + 2 > packet->len)
+ return false;
+
+ p = packet->data + packet->pos;
+
+ *data = (p[0] << 8) | p[1];
+ packet->pos += 2;
+
+ return true;
+}
+
+// Read a 32-bit integer from the packet, returning true if read
+// successfully
+
+boolean NET_ReadInt32(net_packet_t *packet, unsigned int *data)
+{+ byte *p;
+
+ if (packet->pos + 4 > packet->len)
+ return false;
+
+ p = packet->data + packet->pos;
+
+ *data = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
+ packet->pos += 4;
+
+ return true;
+}
+
+// Dynamically increases the size of a packet
+
+static void NET_IncreasePacket(net_packet_t *packet)
+{+ byte *newdata;
+
+ packet->alloced *= 2;
+
+ newdata = Z_Malloc(packet->alloced, PU_STATIC, 0);
+
+ memcpy(newdata, packet->data, packet->len);
+
+ Z_Free(packet->data);
+ packet->data = newdata;
+}
+
+// Write a single byte to the packet
+
+void NET_WriteInt8(net_packet_t *packet, unsigned int i)
+{+ if (packet->len + 1 > packet->alloced)
+ NET_IncreasePacket(packet);
+
+ packet->data[packet->len] = i;
+ packet->len += 1;
+}
+
+// Write a 16-bit integer to the packet
+
+void NET_WriteInt16(net_packet_t *packet, unsigned int i)
+{+ byte *p;
+
+ if (packet->len + 2 > packet->alloced)
+ NET_IncreasePacket(packet);
+
+ p = packet->data + packet->len;
+
+ p[0] = (i >> 8) & 0xff;
+ p[1] = i & 0xff;
+
+ packet->len += 2;
+}
+
+
+// Write a single byte to the packet
+
+void NET_WriteInt32(net_packet_t *packet, unsigned int i)
+{+ byte *p;
+
+ if (packet->len + 4 > packet->alloced)
+ NET_IncreasePacket(packet);
+
+ p = packet->data + packet->len;
+
+ p[0] = (i >> 24) & 0xff;
+ p[1] = (i >> 16) & 0xff;
+ p[2] = (i >> 8) & 0xff;
+ p[3] = i & 0xff;
+
+ packet->len += 4;
+}
+
+
+
+
--- /dev/null
+++ b/src/net_packet.h
@@ -1,0 +1,49 @@
+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// $Id: net_packet.h 229 2005-10-30 19:56:15Z fraggle $
+//
+// Copyright(C) 2005 Simon Howard
+//
+// 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.
+//
+// $Log$
+// Revision 1.1 2005/10/30 19:56:15 fraggle
+// Add foundation code for the new networking system
+//
+//
+// DESCRIPTION:
+// Definitions for use in networking code.
+//
+//-----------------------------------------------------------------------------
+
+#ifndef NET_PACKET_H
+#define NET_PACKET_H
+
+#include "net_defs.h"
+
+net_packet_t *NET_NewPacket(int initial_size);
+net_packet_t *NET_PacketDup(net_packet_t *packet);
+void NET_FreePacket(net_packet_t *packet);
+boolean NET_ReadInt8(net_packet_t *packet, unsigned int *data);
+boolean NET_ReadInt16(net_packet_t *packet, unsigned int *data);
+boolean NET_ReadInt32(net_packet_t *packet, unsigned int *data);
+void NET_WriteInt8(net_packet_t *packet, unsigned int i);
+void NET_WriteInt16(net_packet_t *packet, unsigned int i);
+void NET_WriteInt32(net_packet_t *packet, unsigned int i);
+
+#endif /* #ifndef NET_PACKET_H */
+
--- /dev/null
+++ b/src/net_sdl.c
@@ -1,0 +1,287 @@
+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// $Id: net_sdl.c 229 2005-10-30 19:56:15Z fraggle $
+//
+// Copyright(C) 2005 Simon Howard
+//
+// 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.
+//
+// $Log$
+// Revision 1.1 2005/10/30 19:56:15 fraggle
+// Add foundation code for the new networking system
+//
+//
+// DESCRIPTION:
+// Networking module which uses SDL_net
+//
+//-----------------------------------------------------------------------------
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "i_net.h"
+#include "i_system.h"
+#include "m_argv.h"
+#include "net_defs.h"
+#include "net_packet.h"
+#include "net_sdl.h"
+#include "z_zone.h"
+
+//
+// NETWORKING
+//
+
+#include <SDL_net.h>
+
+static int port = 2342;
+static UDPsocket udpsocket;
+static UDPpacket *recvpacket;
+
+typedef struct
+{+ net_addr_t net_addr;
+ IPaddress sdl_addr;
+} addrpair_t;
+
+static addrpair_t **addr_table;
+static int addr_table_size;
+
+// Initialises the address table
+
+static void NET_SDL_InitAddrTable(void)
+{+ addr_table_size = 16;
+
+ addr_table = Z_Malloc(sizeof(addrpair_t *) * addr_table_size,
+ PU_STATIC, 0);
+ memset(addr_table, 0, sizeof(addrpair_t *) * addr_table_size);
+}
+
+static boolean AddressesEqual(IPaddress *a, IPaddress *b)
+{+ return a->host == b->host
+ && a->port == b->port;
+}
+
+// Finds an address by searching the table. If the address is not found,
+// it is added to the table.
+
+static net_addr_t *NET_SDL_FindAddress(IPaddress *addr)
+{+ addrpair_t *new_entry;
+ int empty_entry = -1;
+ int i;
+
+ for (i=0; i<addr_table_size; ++i)
+ {+ if (addr_table[i] != NULL
+ && AddressesEqual(addr, &addr_table[i]->sdl_addr))
+ {+ return &addr_table[i]->net_addr;
+ }
+
+ if (empty_entry < 0 && addr_table[i] == NULL)
+ empty_entry = i;
+ }
+
+ // Was not found in list. We need to add it.
+
+ // Is there any space in the table? If not, increase the table size
+
+ if (empty_entry < 0)
+ {+ addrpair_t **new_addr_table;
+ int new_addr_table_size;
+
+ // after reallocing, we will add this in as the first entry
+ // in the new block of memory
+
+ empty_entry = addr_table_size;
+
+ // allocate a new array twice the size, init to 0 and copy
+ // the existing table in. replace the old table.
+
+ new_addr_table_size = addr_table_size * 2;
+ new_addr_table = Z_Malloc(sizeof(addrpair_t *) * new_addr_table_size,
+ PU_STATIC, 0);
+ memset(new_addr_table, 0, sizeof(addrpair_t *) * new_addr_table_size);
+ memcpy(new_addr_table, addr_table,
+ sizeof(addrpair_t *) * addr_table_size);
+ Z_Free(addr_table);
+ addr_table = new_addr_table;
+ addr_table_size = new_addr_table_size;
+ }
+
+ // Add a new entry
+
+ new_entry = Z_Malloc(sizeof(addrpair_t), PU_STATIC, 0);
+
+ new_entry->sdl_addr = *addr;
+ new_entry->net_addr.handle = &new_entry->sdl_addr;
+ new_entry->net_addr.module = &i_net_module;
+
+ addr_table[empty_entry] = new_entry;
+
+ return &new_entry->net_addr;
+}
+
+static void NET_SDL_FreeAddress(net_addr_t *addr)
+{+ int i;
+
+ for (i=0; i<addr_table_size; ++i)
+ {+ if (addr == &addr_table[i]->net_addr)
+ {+ Z_Free(addr_table[i]);
+ addr_table[i] = NULL;
+ return;
+ }
+ }
+
+ I_Error("NET_SDL_FreeAddress: Attempted to remove an unused address!");+}
+
+static boolean NET_SDL_InitClient(void)
+{+ SDLNet_Init();
+
+ udpsocket = SDLNet_UDP_Open(0);
+
+ if (udpsocket == NULL)
+ {+ I_Error("NET_SDL_InitClient: Unable to open a socket!");+ }
+
+ NET_SDL_InitAddrTable();
+ recvpacket = SDLNet_AllocPacket(1500);
+
+ return true;
+}
+
+static boolean NET_SDL_InitServer(void)
+{+ int p;
+
+ p = M_CheckParm("-port");+ if (p > 0)
+ port = atoi(myargv[p+1]);
+
+ SDLNet_Init();
+
+ udpsocket = SDLNet_UDP_Open(port);
+
+ if (udpsocket == NULL)
+ {+ I_Error("NET_SDL_InitServer: Unable to bind to port %i", port);+ }
+
+ NET_SDL_InitAddrTable();
+ recvpacket = SDLNet_AllocPacket(1500);
+
+ return true;
+}
+
+static void NET_SDL_SendPacket(net_addr_t *addr, net_packet_t *packet)
+{+ UDPpacket sdl_packet;
+ IPaddress *ip = (IPaddress *) addr->handle;
+
+ sdl_packet.channel = 0;
+ sdl_packet.data = packet->data;
+ sdl_packet.len = packet->len;
+ sdl_packet.address = *ip;
+
+ if (!SDLNet_UDP_Send(udpsocket, -1, &sdl_packet))
+ {+ I_Error("NET_SDL_SendPacket: Error transmitting packet: %s",+ SDLNet_GetError());
+ }
+}
+
+static boolean NET_SDL_RecvPacket(net_addr_t **addr, net_packet_t **packet)
+{+ int result;
+
+ result = SDLNet_UDP_Recv(udpsocket, recvpacket);
+
+ if (result < 0)
+ {+ I_Error("NET_SDL_RecvPacket: Error receiving packet: %s",+ SDLNet_GetError());
+ }
+
+ // no packets received
+
+ if (result == 0)
+ return false;
+
+ // Put the data into a new packet structure
+
+ *packet = NET_NewPacket(recvpacket->len);
+ memcpy((*packet)->data, recvpacket->data, recvpacket->len);
+ (*packet)->len = recvpacket->len;
+
+ // Address
+
+ *addr = NET_SDL_FindAddress(&recvpacket->address);
+
+ return true;
+}
+
+void NET_SDL_AddrToString(net_addr_t *addr, char *buffer, int buffer_len)
+{+ IPaddress *ip;
+
+ ip = (IPaddress *) addr->handle;
+
+ snprintf(buffer, buffer_len,
+ "%i.%i.%i.%i",
+ (ip->host >> 24) & 0xff,
+ (ip->host >> 16) & 0xff,
+ (ip->host >> 8) & 0xff,
+ ip->host & 0xff);
+}
+
+net_addr_t *NET_SDL_ResolveAddress(char *address)
+{+ IPaddress ip;
+
+ if (SDLNet_ResolveHost(&ip, address, port))
+ {+ // unable to resolve
+
+ return NULL;
+ }
+
+ return NET_SDL_FindAddress(&ip);
+}
+
+// Complete module
+
+net_module_t i_net_module =
+{+ NET_SDL_InitClient,
+ NET_SDL_InitServer,
+ NET_SDL_SendPacket,
+ NET_SDL_RecvPacket,
+ NET_SDL_AddrToString,
+ NET_SDL_FreeAddress,
+ NET_SDL_ResolveAddress,
+};
+
--- /dev/null
+++ b/src/net_sdl.h
@@ -1,0 +1,41 @@
+// Emacs style mode select -*- C++ -*-
+//-----------------------------------------------------------------------------
+//
+// $Id: net_sdl.h 229 2005-10-30 19:56:15Z fraggle $
+//
+// Copyright(C) 2005 Simon Howard
+//
+// 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.
+//
+// $Log$
+// Revision 1.1 2005/10/30 19:56:15 fraggle
+// Add foundation code for the new networking system
+//
+//
+// DESCRIPTION:
+// Networking module which uses SDL_net
+//
+//-----------------------------------------------------------------------------
+
+#ifndef NET_SDL_H
+#define NET_SDL_H
+
+#include "net_defs.h"
+
+extern net_module_t i_net_module;
+
+#endif /* #ifndef NET_SDL_H */
+