diff options
Diffstat (limited to 'network/core/packet.c')
| -rw-r--r-- | network/core/packet.c | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/network/core/packet.c b/network/core/packet.c deleted file mode 100644 index 957bd2ad6..000000000 --- a/network/core/packet.c +++ /dev/null @@ -1,216 +0,0 @@ -/* $Id$ */ - -#ifdef ENABLE_NETWORK - -#include "../../stdafx.h" -#include "../../macros.h" -#include "../../string.h" - -#include "os_abstraction.h" -#include "config.h" -#include "packet.h" - -/** - * @file packet.h Basic functions to create, fill and read packets. - */ - - -/* Do not want to include functions.h and all required headers */ -extern void NORETURN CDECL error(const char *str, ...); - - -/** - * Create a packet for sending - * @param type the of packet - * @return the newly created packet - */ -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; -} - -/** - * Writes the packet size from the raw packet from packet->size - * @param packet the packet to write the size of - */ -void NetworkSend_FillPacketSize(Packet *packet) -{ - packet->buffer[0] = GB(packet->size, 0, 8); - packet->buffer[1] = GB(packet->size, 8, 8); -} - -/** - * The next couple of functions make sure we can send - * uint8, uint16, uint32 and uint64 endian-safe - * over the network. The least significant bytes are - * sent first. - * - * So 0x01234567 would be sent as 67 45 23 01. - */ - -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') {} -} - - -/** - * Receiving commands - * Again, the next couple of functions are endian-safe - * see the comment before NetworkSend_uint8 for more info. - */ - - -extern uint CloseConnection(NetworkClientState *cs); - -/** Is it safe to read from the packet, i.e. didn't we run over the buffer ? */ -static inline bool CanReadFromPacket(NetworkClientState *cs, Packet *packet, uint bytes_to_read) -{ - /* Don't allow reading from a closed socket */ - if (HasClientQuit(cs)) return false; - - /* Check if variable is within packet-size */ - if (packet->pos + bytes_to_read > packet->size) { - CloseConnection(cs); - return false; - } - - return true; -} - -/** - * Reads the packet size from the raw packet and stores it in the packet->size - * @param packet the packet to read the size of - */ -void NetworkRecv_ReadPacketSize(Packet *packet) -{ - packet->size = (uint16)packet->buffer[0]; - packet->size += (uint16)packet->buffer[1] << 8; -} - -uint8 NetworkRecv_uint8(NetworkClientState *cs, Packet *packet) -{ - uint8 n; - - if (!CanReadFromPacket(cs, packet, sizeof(n))) return 0; - - n = packet->buffer[packet->pos++]; - return n; -} - -uint16 NetworkRecv_uint16(NetworkClientState *cs, Packet *packet) -{ - uint16 n; - - if (!CanReadFromPacket(cs, packet, sizeof(n))) 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; - - if (!CanReadFromPacket(cs, packet, sizeof(n))) 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; - - if (!CanReadFromPacket(cs, packet, sizeof(n))) 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 (HasClientQuit(cs)) 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 than 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); -} - -#endif /* ENABLE_NETWORK */ |