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// Copyright (c) Athena Dev Teams - Licensed under GNU GPL
// For more information, see LICENCE in the main folder
#ifndef _SOCKET_H_
#define _SOCKET_H_
#ifdef WIN32
#include <windows.h>
typedef long in_addr_t;
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#endif
#include "../common/cbasetypes.h"
#include <time.h>
// socket I/O macros
#ifdef TURBO
#define RFIFOVAR(fd) rbPtr ## fd
#define WFIFOVAR(fd) wbPtr ## fd
#define RFIFOHEAD(fd) uint8 *RFIFOVAR(fd) = session[fd]->rdata+session[fd]->rdata_pos
#define WFIFOHEAD(fd, x) uint8 *WFIFOVAR(fd) = ( (fd) > 0 && session[fd] ? session[fd]->wdata+session[fd]->wdata_size : NULL )
#define RFIFOP(fd,pos) ( &RFIFOVAR(fd) + (pos) )
#define WFIFOP(fd,pos) ( &WFIFOVAR(fd) + (pos) )
#else
#define RFIFOHEAD(fd)
#define WFIFOHEAD(fd, size) do{ if((fd) && session[fd]->wdata_size + (size) > session[fd]->max_wdata ) realloc_writefifo(fd, size); }while(0)
#define RFIFOP(fd,pos) (session[fd]->rdata + session[fd]->rdata_pos + (pos))
#define WFIFOP(fd,pos) (session[fd]->wdata + session[fd]->wdata_size + (pos))
#endif
#define RFIFOB(fd,pos) (*(uint8*)RFIFOP(fd,pos))
#define WFIFOB(fd,pos) (*(uint8*)WFIFOP(fd,pos))
#define RFIFOW(fd,pos) (*(uint16*)RFIFOP(fd,pos))
#define WFIFOW(fd,pos) (*(uint16*)WFIFOP(fd,pos))
#define RFIFOL(fd,pos) (*(uint32*)RFIFOP(fd,pos))
#define WFIFOL(fd,pos) (*(uint32*)WFIFOP(fd,pos))
#define RFIFOSPACE(fd) (session[fd]->max_rdata - session[fd]->rdata_size)
#define WFIFOSPACE(fd) (session[fd]->max_wdata - session[fd]->wdata_size)
#define RFIFOREST(fd) (session[fd]->rdata_size - session[fd]->rdata_pos)
#define RFIFOFLUSH(fd) \
do { \
if(session[fd]->rdata_size == session[fd]->rdata_pos){ \
session[fd]->rdata_size = session[fd]->rdata_pos = 0; \
} else { \
session[fd]->rdata_size -= session[fd]->rdata_pos; \
memmove(session[fd]->rdata, session[fd]->rdata+session[fd]->rdata_pos, session[fd]->rdata_size); \
session[fd]->rdata_pos = 0; \
} \
} while(0)
// buffer I/O macros
#define RBUFP(p,pos) (((uint8*)(p)) + (pos))
#define RBUFB(p,pos) (*(uint8*)RBUFP((p),(pos)))
#define RBUFW(p,pos) (*(uint16*)RBUFP((p),(pos)))
#define RBUFL(p,pos) (*(uint32*)RBUFP((p),(pos)))
#define WBUFP(p,pos) (((uint8*)(p)) + (pos))
#define WBUFB(p,pos) (*(uint8*)WBUFP((p),(pos)))
#define WBUFW(p,pos) (*(uint16*)WBUFP((p),(pos)))
#define WBUFL(p,pos) (*(uint32*)WBUFP((p),(pos)))
#define TOB(n) ((uint8)((n)&UINT8_MAX))
#define TOW(n) ((uint16)((n)&UINT16_MAX))
#define TOL(n) ((uint32)((n)&UINT32_MAX))
// Struct declaration
typedef int (*RecvFunc)(int fd);
typedef int (*SendFunc)(int fd);
typedef int (*ParseFunc)(int fd);
struct socket_data {
unsigned char eof;
unsigned char *rdata, *wdata;
size_t max_rdata, max_wdata;
size_t rdata_size, wdata_size;
size_t rdata_pos;
time_t rdata_tick; // time of last receive (for detecting timeouts)
struct sockaddr_in client_addr; // remote client address (zero for s2s connections)
void* session_data;
RecvFunc func_recv;
SendFunc func_send;
ParseFunc func_parse;
};
// Data prototype declaration
extern struct socket_data* session[FD_SETSIZE];
extern int fd_max;
extern time_t last_tick;
extern time_t stall_time;
//////////////////////////////////
// some checking on sockets
extern int session_isValid(int fd);
extern int session_isActive(int fd);
//////////////////////////////////
// Function prototype declaration
int make_listen_bind(long,int);
int make_connection(long,int);
int realloc_fifo(int fd,unsigned int rfifo_size,unsigned int wfifo_size);
int realloc_writefifo(int fd, size_t addition);
int WFIFOSET(int fd,int len);
int RFIFOSKIP(int fd,int len);
int do_sendrecv(int next);
int do_parsepacket(void);
void do_close(int fd);
void socket_init(void);
void socket_final(void);
extern void flush_fifo(int fd);
extern void flush_fifos(void);
extern void set_nonblocking(int fd, int yes);
void set_defaultparse(ParseFunc defaultparse);
// hostname/ip conversion functions
in_addr_t host2ip(const char* hostname);
const char* ip2str(in_addr_t ip, char ip_str[16]);
int socket_getips(uint32* ips, int max);
extern uint32 addr_[16]; // ip addresses of local host (host byte order)
extern int naddr_; // # of ip addresses
#endif /* _SOCKET_H_ */
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