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-rw-r--r--network_data.c473
1 files changed, 0 insertions, 473 deletions
diff --git a/network_data.c b/network_data.c
deleted file mode 100644
index 62e95e2cd..000000000
--- a/network_data.c
+++ /dev/null
@@ -1,473 +0,0 @@
-/* $Id$ */
-
-#ifdef ENABLE_NETWORK
-
-#include "stdafx.h"
-#include "debug.h"
-#include "network_data.h"
-#include "functions.h"
-#include "string.h"
-#include "table/strings.h"
-#include "network_client.h"
-#include "command.h"
-#include "callback_table.h"
-#include "variables.h"
-
-// This files handles the send/receive of all packets
-
-// Create a packet for sending
-Packet *NetworkSend_Init(PacketType type)
-{
- Packet *packet = malloc(sizeof(Packet));
- // An error is inplace here, because it simply means we ran out of memory.
- if (packet == NULL) error("Failed to allocate Packet");
-
- // Skip the size so we can write that in before sending the packet
- packet->size = sizeof(packet->size);
- packet->buffer[packet->size++] = type;
- packet->pos = 0;
-
- return packet;
-}
-
-// The next couple of functions make sure we can send
-// uint8, uint16, uint32 and uint64 endian-safe
-// over the network. The order it uses is:
-//
-// 1 2 3 4
-//
-
-void NetworkSend_uint8(Packet *packet, uint8 data)
-{
- assert(packet->size < sizeof(packet->buffer) - sizeof(data));
- packet->buffer[packet->size++] = data;
-}
-
-void NetworkSend_uint16(Packet *packet, uint16 data)
-{
- assert(packet->size < sizeof(packet->buffer) - sizeof(data));
- packet->buffer[packet->size++] = GB(data, 0, 8);
- packet->buffer[packet->size++] = GB(data, 8, 8);
-}
-
-void NetworkSend_uint32(Packet *packet, uint32 data)
-{
- assert(packet->size < sizeof(packet->buffer) - sizeof(data));
- packet->buffer[packet->size++] = GB(data, 0, 8);
- packet->buffer[packet->size++] = GB(data, 8, 8);
- packet->buffer[packet->size++] = GB(data, 16, 8);
- packet->buffer[packet->size++] = GB(data, 24, 8);
-}
-
-void NetworkSend_uint64(Packet *packet, uint64 data)
-{
- assert(packet->size < sizeof(packet->buffer) - sizeof(data));
- packet->buffer[packet->size++] = GB(data, 0, 8);
- packet->buffer[packet->size++] = GB(data, 8, 8);
- packet->buffer[packet->size++] = GB(data, 16, 8);
- packet->buffer[packet->size++] = GB(data, 24, 8);
- packet->buffer[packet->size++] = GB(data, 32, 8);
- packet->buffer[packet->size++] = GB(data, 40, 8);
- packet->buffer[packet->size++] = GB(data, 48, 8);
- packet->buffer[packet->size++] = GB(data, 56, 8);
-}
-
-// Sends a string over the network. It sends out
-// the string + '\0'. No size-byte or something.
-void NetworkSend_string(Packet *packet, const char* data)
-{
- assert(data != NULL);
- assert(packet->size < sizeof(packet->buffer) - strlen(data) - 1);
- while ((packet->buffer[packet->size++] = *data++) != '\0') {}
-}
-
-// If PacketSize changes of size, you have to change the 2 packet->size
-// lines below matching the size of packet->size/PacketSize!
-// (line 'packet->buffer[0] = packet->size & 0xFF;' and below)
-assert_compile(sizeof(PacketSize) == 2);
-
-// This function puts the packet in the send-queue and it is send
-// as soon as possible
-// (that is: the next tick, or maybe one tick later if the
-// OS-network-buffer is full)
-void NetworkSend_Packet(Packet *packet, NetworkClientState *cs)
-{
- Packet *p;
- assert(packet != NULL);
-
- packet->pos = 0;
- packet->next = NULL;
-
- packet->buffer[0] = GB(packet->size, 0, 8);
- packet->buffer[1] = GB(packet->size, 8, 8);
-
- // Locate last packet buffered for the client
- p = cs->packet_queue;
- if (p == NULL) {
- // No packets yet
- cs->packet_queue = packet;
- } else {
- // Skip to the last packet
- while (p->next != NULL) p = p->next;
- p->next = packet;
- }
-}
-
-// Functions to help NetworkRecv_Packet/NetworkSend_Packet a bit
-// A socket can make errors. When that happens
-// this handles what to do.
-// For clients: close connection and drop back to main-menu
-// For servers: close connection and that is it
-static NetworkRecvStatus CloseConnection(NetworkClientState *cs)
-{
- NetworkCloseClient(cs);
-
- // Clients drop back to the main menu
- if (!_network_server && _networking) {
- _switch_mode = SM_MENU;
- _networking = false;
- _switch_mode_errorstr = STR_NETWORK_ERR_LOSTCONNECTION;
-
- return NETWORK_RECV_STATUS_CONN_LOST;
- }
-
- return NETWORK_RECV_STATUS_OKAY;
-}
-
-// Sends all the buffered packets out for this client
-// it stops when:
-// 1) all packets are send (queue is empty)
-// 2) the OS reports back that it can not send any more
-// data right now (full network-buffer, it happens ;))
-// 3) sending took too long
-bool NetworkSend_Packets(NetworkClientState *cs)
-{
- ssize_t res;
- Packet *p;
-
- // We can not write to this socket!!
- if (!cs->writable) return false;
- if (cs->socket == INVALID_SOCKET) return false;
-
- p = cs->packet_queue;
- while (p != NULL) {
- res = send(cs->socket, p->buffer + p->pos, p->size - p->pos, 0);
- if (res == -1) {
- int err = GET_LAST_ERROR();
- if (err != EWOULDBLOCK) { // Something went wrong.. close client!
- DEBUG(net, 0, "send failed with error %d", err);
- CloseConnection(cs);
- return false;
- }
- return true;
- }
- if (res == 0) {
- // Client/server has left us :(
- CloseConnection(cs);
- return false;
- }
-
- p->pos += res;
-
- // Is this packet sent?
- if (p->pos == p->size) {
- // Go to the next packet
- cs->packet_queue = p->next;
- free(p);
- p = cs->packet_queue;
- } else {
- return true;
- }
- }
-
- return true;
-}
-
-
-// Receiving commands
-// Again, the next couple of functions are endian-safe
-// see the comment around NetworkSend_uint8 for more info.
-uint8 NetworkRecv_uint8(NetworkClientState *cs, Packet *packet)
-{
- /* Don't allow reading from a closed socket */
- if (cs->has_quit) return 0;
-
- /* Check if variable is within packet-size */
- if (packet->pos + 1 > packet->size) {
- CloseConnection(cs);
- return 0;
- }
-
- return packet->buffer[packet->pos++];
-}
-
-uint16 NetworkRecv_uint16(NetworkClientState *cs, Packet *packet)
-{
- uint16 n;
-
- /* Don't allow reading from a closed socket */
- if (cs->has_quit) return 0;
-
- /* Check if variable is within packet-size */
- if (packet->pos + 2 > packet->size) {
- CloseConnection(cs);
- return 0;
- }
-
- n = (uint16)packet->buffer[packet->pos++];
- n += (uint16)packet->buffer[packet->pos++] << 8;
- return n;
-}
-
-uint32 NetworkRecv_uint32(NetworkClientState *cs, Packet *packet)
-{
- uint32 n;
-
- /* Don't allow reading from a closed socket */
- if (cs->has_quit) return 0;
-
- /* Check if variable is within packet-size */
- if (packet->pos + 4 > packet->size) {
- CloseConnection(cs);
- return 0;
- }
-
- n = (uint32)packet->buffer[packet->pos++];
- n += (uint32)packet->buffer[packet->pos++] << 8;
- n += (uint32)packet->buffer[packet->pos++] << 16;
- n += (uint32)packet->buffer[packet->pos++] << 24;
- return n;
-}
-
-uint64 NetworkRecv_uint64(NetworkClientState *cs, Packet *packet)
-{
- uint64 n;
-
- /* Don't allow reading from a closed socket */
- if (cs->has_quit) return 0;
-
- /* Check if variable is within packet-size */
- if (packet->pos + 8 > packet->size) {
- CloseConnection(cs);
- return 0;
- }
-
- n = (uint64)packet->buffer[packet->pos++];
- n += (uint64)packet->buffer[packet->pos++] << 8;
- n += (uint64)packet->buffer[packet->pos++] << 16;
- n += (uint64)packet->buffer[packet->pos++] << 24;
- n += (uint64)packet->buffer[packet->pos++] << 32;
- n += (uint64)packet->buffer[packet->pos++] << 40;
- n += (uint64)packet->buffer[packet->pos++] << 48;
- n += (uint64)packet->buffer[packet->pos++] << 56;
- return n;
-}
-
-// Reads a string till it finds a '\0' in the stream
-void NetworkRecv_string(NetworkClientState *cs, Packet *p, char *buffer, size_t size)
-{
- PacketSize pos;
- char *bufp = buffer;
-
- /* Don't allow reading from a closed socket */
- if (cs->has_quit) return;
-
- pos = p->pos;
- while (--size > 0 && pos < p->size && (*buffer++ = p->buffer[pos++]) != '\0') {}
-
- if (size == 0 || pos == p->size) {
- *buffer = '\0';
- // If size was sooner to zero then the string in the stream
- // skip till the \0, so the packet can be read out correctly for the rest
- while (pos < p->size && p->buffer[pos] != '\0') pos++;
- pos++;
- }
- p->pos = pos;
-
- str_validate(bufp);
-}
-
-// If PacketSize changes of size, you have to change the 2 packet->size
-// lines below matching the size of packet->size/PacketSize!
-// (the line: 'p->size = (uint16)p->buffer[0];' and below)
-assert_compile(sizeof(PacketSize) == 2);
-
-Packet *NetworkRecv_Packet(NetworkClientState *cs, NetworkRecvStatus *status)
-{
- ssize_t res;
- Packet *p;
-
- *status = NETWORK_RECV_STATUS_OKAY;
-
- if (cs->socket == INVALID_SOCKET) return NULL;
-
- if (cs->packet_recv == NULL) {
- cs->packet_recv = malloc(sizeof(Packet));
- if (cs->packet_recv == NULL) error("Failed to allocate packet");
- // Set pos to zero!
- cs->packet_recv->pos = 0;
- cs->packet_recv->size = 0; // Can be ommited, just for safety reasons
- }
-
- p = cs->packet_recv;
-
- // Read packet size
- if (p->pos < sizeof(PacketSize)) {
- while (p->pos < sizeof(PacketSize)) {
- // Read the size of the packet
- res = recv(cs->socket, p->buffer + p->pos, sizeof(PacketSize) - p->pos, 0);
- if (res == -1) {
- int err = GET_LAST_ERROR();
- if (err != EWOULDBLOCK) {
- /* Something went wrong... (104 is connection reset by peer) */
- if (err != 104) DEBUG(net, 0, "recv failed with error %d", err);
- *status = CloseConnection(cs);
- return NULL;
- }
- // Connection would block, so stop for now
- return NULL;
- }
- if (res == 0) {
- // Client/server has left
- *status = CloseConnection(cs);
- return NULL;
- }
- p->pos += res;
- }
-
- p->size = (uint16)p->buffer[0];
- p->size += (uint16)p->buffer[1] << 8;
-
- if (p->size > SEND_MTU) {
- *status = CloseConnection(cs);
- return NULL;
- }
- }
-
- // Read rest of packet
- while (p->pos < p->size) {
- res = recv(cs->socket, p->buffer + p->pos, p->size - p->pos, 0);
- if (res == -1) {
- int err = GET_LAST_ERROR();
- if (err != EWOULDBLOCK) {
- /* Something went wrong... (104 is connection reset by peer) */
- if (err != 104) DEBUG(net, 0, "recv failed with error %d", err);
- *status = CloseConnection(cs);
- return NULL;
- }
- // Connection would block
- return NULL;
- }
- if (res == 0) {
- // Client/server has left
- *status = CloseConnection(cs);
- return NULL;
- }
-
- p->pos += res;
- }
-
- // We have a complete packet, return it!
- p->pos = 2;
- p->next = NULL; // Should not be needed, but who knows...
-
- // Prepare for receiving a new packet
- cs->packet_recv = NULL;
-
- return p;
-}
-
-// Add a command to the local command queue
-void NetworkAddCommandQueue(NetworkClientState *cs, CommandPacket *cp)
-{
- CommandPacket* new_cp = malloc(sizeof(*new_cp));
-
- *new_cp = *cp;
-
- if (cs->command_queue == NULL) {
- cs->command_queue = new_cp;
- } else {
- CommandPacket *c = cs->command_queue;
- while (c->next != NULL) c = c->next;
- c->next = new_cp;
- }
-}
-
-// Prepare a DoCommand to be send over the network
-void NetworkSend_Command(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback)
-{
- CommandPacket *c = malloc(sizeof(CommandPacket));
- byte temp_callback;
-
- c->player = _local_player;
- c->next = NULL;
- c->tile = tile;
- c->p1 = p1;
- c->p2 = p2;
- c->cmd = cmd;
- c->callback = 0;
-
- temp_callback = 0;
-
- while (temp_callback < _callback_table_count && _callback_table[temp_callback] != callback)
- temp_callback++;
- if (temp_callback == _callback_table_count) {
- DEBUG(net, 0, "Unknown callback. (Pointer: %p) No callback sent", callback);
- temp_callback = 0; /* _callback_table[0] == NULL */
- }
-
- if (_network_server) {
- // We are the server, so set the command to be executed next possible frame
- c->frame = _frame_counter_max + 1;
- } else {
- c->frame = 0; // The client can't tell which frame, so just make it 0
- }
-
- ttd_strlcpy(c->text, (_cmd_text != NULL) ? _cmd_text : "", lengthof(c->text));
-
- if (_network_server) {
- // If we are the server, we queue the command in our 'special' queue.
- // In theory, we could execute the command right away, but then the
- // client on the server can do everything 1 tick faster than others.
- // So to keep the game fair, we delay the command with 1 tick
- // which gives about the same speed as most clients.
- NetworkClientState *cs;
-
- // And we queue it for delivery to the clients
- FOR_ALL_CLIENTS(cs) {
- if (cs->status > STATUS_AUTH) NetworkAddCommandQueue(cs, c);
- }
-
- // Only the server gets the callback, because clients should not get them
- c->callback = temp_callback;
- if (_local_command_queue == NULL) {
- _local_command_queue = c;
- } else {
- // Find last packet
- CommandPacket *cp = _local_command_queue;
- while (cp->next != NULL) cp = cp->next;
- cp->next = c;
- }
-
- return;
- }
-
- // Clients send their command to the server and forget all about the packet
- c->callback = temp_callback;
- SEND_COMMAND(PACKET_CLIENT_COMMAND)(c);
-}
-
-// Execute a DoCommand we received from the network
-void NetworkExecuteCommand(CommandPacket *cp)
-{
- _current_player = cp->player;
- _cmd_text = cp->text;
- /* cp->callback is unsigned. so we don't need to do lower bounds checking. */
- if (cp->callback > _callback_table_count) {
- DEBUG(net, 0, "Received out-of-bounds callback (%d)", cp->callback);
- cp->callback = 0;
- }
- DoCommandP(cp->tile, cp->p1, cp->p2, _callback_table[cp->callback], cp->cmd | CMD_NETWORK_COMMAND);
-}
-
-#endif /* ENABLE_NETWORK */
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