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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_
#ifndef _CBASETYPES_H_
#include "../common/cbasetypes.h"
#endif
#ifdef WIN32
#include <winsock2.h>
typedef long in_addr_t;
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#endif
#include <time.h>
// socket I/O macros
#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))
#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]->eof ? 0 : 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 recv (for detecting timeouts); zero when timeout is disabled
uint32 client_addr; // remote client address (0 for server connections)
RecvFunc func_recv;
SendFunc func_send;
ParseFunc func_parse;
void* session_data; // stores application-specific data related to the session
};
// 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 bool session_isValid(int fd);
extern bool session_isActive(int fd);
//////////////////////////////////
// Function prototype declaration
int make_listen_bind(uint32 ip, uint16 port);
int make_connection(uint32 ip, uint16 port);
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, size_t len);
int RFIFOSKIP(int fd, size_t len);
int do_sockets(int next);
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, unsigned long yes);
void set_defaultparse(ParseFunc defaultparse);
// hostname/ip conversion functions
uint32 host2ip(const char* hostname);
const char* ip2str(uint32 ip, char ip_str[16]);
uint32 str2ip(const char* ip_str);
#define CONVIP(ip) ((ip)>>24)&0xFF,((ip)>>16)&0xFF,((ip)>>8)&0xFF,((ip)>>0)&0xFF
uint16 ntows(uint16 netshort);
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
void set_eof(int fd);
/// Use a shortlist of sockets instead of iterating all sessions for sockets
/// that have data to send or need eof handling.
/// Adapted to use a static array instead of a linked list.
///
/// @author Buuyo-tama
#define SEND_SHORTLIST
#ifdef SEND_SHORTLIST
struct send_shortlist_node {
struct send_shortlist_node *next; // Next node in the linked list
struct send_shortlist_node *prev; // Previous node in the linked list
int fd; // FD that needs sending.
};
// Add a fd to the shortlist so that it'll be recognized as a fd that needs
// sending done on it.
void send_shortlist_add_fd(int fd);
// Do pending network sends (and eof handling) from the shortlist.
void send_shortlist_do_sends();
#endif
#endif /* _SOCKET_H_ */
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