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/* File: z-term.c */
/*
* Copyright (c) 1997 Ben Harrison
*
* This software may be copied and distributed for educational, research,
* and not for profit purposes provided that this copyright and statement
* are included in all such copies.
*/
/* Purpose: a generic, IP connection package */
#include "angband.h"
#include "z-term.h"
#include "z-virt.h"
/*
* System independant functions
*/
/* Call all the callbacks */
void zsock_handle_callbacks()
{
timer_callback_list *c = zsock.__timer_callbacks;
while (c != NULL)
{
c->callback();
c = c->next;
}
}
/* Add a callback in the list */
void zsock_add_timer_callback(timer_callback callback)
{
timer_callback_list *c;
/* Create it */
MAKE(c, timer_callback_list);
c->callback = callback;
/* Add it into the lsit */
c->next = zsock.__timer_callbacks;
zsock.__timer_callbacks = c;
/* Increase the timer count */
zsock.__timers++;
}
/* Remove a callback in the list */
void zsock_remove_timer_callback(timer_callback callback)
{
timer_callback_list *c = zsock.__timer_callbacks, *old = NULL;
/* Find it */
while ((c != NULL) && (c->callback != callback))
{
old = c;
c = c->next;
}
if (c->callback == callback)
{
/* Skip it */
if (old == NULL)
zsock.__timer_callbacks = c->next;
else
old->next = c->next;
/* Delete it */
FREE(c, timer_callback_list);
/* Increase the timer count */
zsock.__timers--;
}
else
{
cmsg_print(TERM_VIOLET, "WARNING: tried to remove a non existing timer callback!");
}
}
/* Creates a connection struct */
ip_connection *zsock_new_connection()
{
ip_connection *c;
MAKE(c, ip_connection);
return c;
}
void zsock_free_connection(ip_connection *c)
{
FREE(c, ip_connection);
}
/* Set the dying connection callback */
void zsock_set_lose_connection(ip_connection *conn, lose_connection_hook hook)
{
conn->lost_conn = hook;
}
/* Send data on the connection -- easy to use */
bool zsock_write_simple(ip_connection *conn, cptr str)
{
int len = 0;
return zsock.write(conn, str, &len);
}
/* Read data on the connection -- easy to use */
bool zsock_read_simple(ip_connection *conn, char *str, int len)
{
int rlen = len;
return zsock.read(conn, str, &rlen, FALSE);
}
/*
******************************* Here comes the Windows socket part ********************************
*/
#ifdef USE_WINSOCK
#include <windows.h>
#include <winsock2.h>
/* Needed for timers -- pfft */
extern HWND get_main_hwnd();
#define ZSOCK_TIMER_ID 1
VOID CALLBACK zsock_timer_callback_win(HWND hwnd, UINT message, UINT idTimer, DWORD dwTime)
{
zsock_handle_callbacks();
}
bool zsock_add_timer_win(timer_callback callback)
{
zsock_add_timer_callback(callback);
/* Is it the first callback ? then we must create the timer */
if (zsock.__timers == 1)
{
SetTimer(get_main_hwnd(), ZSOCK_TIMER_ID, ZSOCK_TIMER_DELAY, zsock_timer_callback_win);
}
return TRUE;
}
bool zsock_remove_timer_win(timer_callback callback)
{
zsock_remove_timer_callback(callback);
/* No more callbacks ? no need for the timer then */
if (!zsock.__timers)
{
KillTimer(get_main_hwnd(), ZSOCK_TIMER_ID);
}
return TRUE;
}
bool zsock_setup_win(ip_connection *conn, cptr conn_ip, int port, byte conn_type, bool server)
{
/* Already setup! */
if (conn->setup) return FALSE;
MAKE(conn->socket, SOCKET);
if (!server)
{
struct hostent *host;
host = gethostbyname(conn_ip);
conn->conn_ip = ((struct in_addr *)(host->h_addr))->s_addr;
}
else
conn->conn_ip = 0;
conn->conn_type = conn_type;
conn->conn_port = htons(port);
conn->setup = TRUE;
conn->server = server;
conn->lost_conn = NULL;
return TRUE;
}
bool zsock_unsetup_win(ip_connection *conn)
{
/* Already unsetup */
if (!conn->setup) return FALSE;
FREE(conn->socket, SOCKET);
return TRUE;
}
bool zsock_open_win(ip_connection *conn)
{
struct sockaddr_in sin;
/* Already connected */
if (conn->connected) return FALSE;
*((SOCKET*)conn->socket) = socket(AF_INET, SOCK_STREAM, 0);
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = conn->conn_ip;
sin.sin_port = conn->conn_port;
if (conn->server)
{
if (SOCKET_ERROR == bind(*((SOCKET*)conn->socket), &sin, sizeof(sin)))
return FALSE;
if (SOCKET_ERROR == listen(*((SOCKET*)conn->socket), 10)) return FALSE;
}
else
{
if (connect(*((SOCKET*)conn->socket), &sin, sizeof sin) == SOCKET_ERROR)
{
/* could not connect to server */
return (FALSE);
}
}
conn->connected = TRUE;
return TRUE;
}
bool zsock_can_read_win(ip_connection *conn)
{
struct timeval t;
fd_set rd;
SOCKET *c = conn->socket;
if (!conn->connected) return FALSE;
FD_ZERO(&rd);
FD_SET(*c, &rd);
t.tv_sec = 0;
t.tv_usec = 0;
select(*c + 1, &rd, NULL, NULL, &t);
if (FD_ISSET(*c, &rd)) return TRUE;
else return (FALSE);
}
bool zsock_wait_win(ip_connection *conn, int seconds)
{
struct timeval t;
fd_set rd;
SOCKET *c = conn->socket;
if (!conn->connected) return FALSE;
t.tv_sec = seconds;
t.tv_usec = 0;
FD_ZERO(&rd);
FD_SET(*c, &rd);
select(*c + 1, &rd, NULL, NULL, &t);
if (FD_ISSET(*c, &rd)) return TRUE;
else return (FALSE);
}
bool zsock_close_win(ip_connection *conn)
{
SOCKET *c = conn->socket;
/* Already disconnected */
if (!conn->connected) return FALSE;
closesocket(*c);
conn->connected = FALSE;
return TRUE;
}
bool zsock_write_win(ip_connection *conn, cptr str, int *size)
{
SOCKET *c = conn->socket;
if (!conn->connected) return FALSE;
if ((*size = send(*c, str, (!*size) ? strlen(str) : *size, 0)) <= 0)
{
/* Oups connection died! */
if (conn->lost_conn) conn->lost_conn(conn);
zsock.close(conn);
return FALSE;
}
return TRUE;
}
bool zsock_read_win(ip_connection *conn, char *str, int *len, bool raw)
{
char c;
int l = 0;
SOCKET *cc = conn->socket;
if (!conn->connected) return FALSE;
if (!raw)
{
/* This *IS* fucking slow */
while ((l < *len) && zsock_can_read_win(conn))
{
if (recv(*cc, &c, 1, 0) <= 0)
{
/* Oups connection died! */
if (conn->lost_conn) conn->lost_conn(conn);
zsock.close(conn);
return FALSE;
}
if (c == '\r') continue;
if (c == '\n') break;
str[l++] = c;
}
str[l] = '\0';
*len = l;
return TRUE;
}
else
{
if ((*len = recv(*cc, str, *len, 0)) <= 0)
{
/* Oups connection died! */
if (conn->lost_conn) conn->lost_conn(conn);
zsock.close(conn);
return FALSE;
}
return TRUE;
}
}
bool zsock_accept_win(ip_connection *conn, ip_connection *child)
{
SOCKET *s = conn->socket;
SOCKET sock;
struct sockaddr_in sin;
int len;
if (!conn->server) return FALSE;
if (!conn->connected) return FALSE;
len = sizeof(sin);
sock = accept(*s, (struct sockaddr*) & sin, &len);
if (sock == SOCKET_ERROR) return FALSE;
/* Initialize the connection with a fake destination */
zsock.setup(child, "127.0.0.1", 0, ZSOCK_TYPE_TCP, FALSE);
/* Set the correct socket */
*((SOCKET*)child->socket) = sock;
child->connected = TRUE;
return TRUE;
}
bool init_socks_win()
{
WSADATA wsaData;
WORD version;
int error;
version = MAKEWORD( 2, 0 );
error = WSAStartup( version, &wsaData );
/* check for error */
if ( error != 0 )
{
/* error occured */
return FALSE;
}
/* check for correct version */
if ( LOBYTE( wsaData.wVersion ) != 2 ||
HIBYTE( wsaData.wVersion ) != 0 )
{
/* incorrect WinSock version */
WSACleanup();
return FALSE;
}
return TRUE;
}
#endif
/*
****************************** And there is the unix sockets **************************
*/
#ifdef USE_UNIXSOCK
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <netdb.h>
#include <signal.h>
void handle_timer(int sig)
{
zsock_handle_callbacks();
}
static struct sigaction handle_old_alarm;
bool zsock_add_timer_unix(timer_callback callback)
{
zsock_add_timer_callback(callback);
/* Is it the first callback ? then we must create the timer */
if (zsock.__timers == 1)
{
struct sigaction new_sig;
/* Register the timer */
new_sig.sa_handler = handle_timer;
new_sig.sa_flags = 0;
sigaction(SIGALRM, &new_sig, &handle_old_alarm);
ualarm(ZSOCK_TIMER_DELAY * 1000, ZSOCK_TIMER_DELAY * 1000);
}
return TRUE;
}
bool zsock_remove_timer_unix(timer_callback callback)
{
zsock_remove_timer_callback(callback);
/* No more callbacks ? no need for the timer then */
if (!zsock.__timers)
{
alarm(0);
sigaction(SIGALRM, &handle_old_alarm, NULL);
}
return TRUE;
}
bool zsock_setup_unix(ip_connection *conn, cptr conn_ip, int port, byte conn_type, bool server)
{
/* Already setup! */
if (conn->setup) return FALSE;
MAKE(conn->socket, int);
if (!server)
{
struct hostent *host;
host = gethostbyname(conn_ip);
conn->conn_ip = ((struct in_addr *)(host->h_addr))->s_addr;
}
else
conn->conn_ip = 0;
conn->conn_type = conn_type;
conn->conn_port = htons(port);
conn->setup = TRUE;
conn->server = server;
conn->lost_conn = NULL;
return TRUE;
}
bool zsock_unsetup_unix(ip_connection *conn)
{
/* Already unsetup */
if (!conn->setup) return FALSE;
FREE(conn->socket, int);
return TRUE;
}
bool zsock_open_unix(ip_connection *conn)
{
struct sockaddr_in sin;
/* Already connected */
if (conn->connected) return FALSE;
*((int*)conn->socket) = socket(AF_INET, SOCK_STREAM, 0);
memset(&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = conn->conn_ip;
sin.sin_port = conn->conn_port;
if (conn->server)
{
int option = 1;
/* Set this so we don't wait forever on startups */
if ( -1 == setsockopt(*((int*)conn->socket), SOL_SOCKET, SO_REUSEADDR , (void*)&option, sizeof(int))) return FALSE;
if ( -1 == bind(*((int*)conn->socket), (struct sockaddr*)&sin, sizeof(sin)))
return FALSE;
if ( -1 == listen(*((int*)conn->socket), 10)) return FALSE;
}
else
{
if (connect(*((int*)conn->socket), (struct sockaddr*)&sin, sizeof sin) == -1)
{
/* could not connect to server */
return (FALSE);
}
}
conn->connected = TRUE;
return TRUE;
}
bool zsock_can_read_unix(ip_connection *conn)
{
struct timeval t;
fd_set rd;
int *c = conn->socket;
if (!conn->connected) return FALSE;
FD_ZERO(&rd);
FD_SET(*c, &rd);
t.tv_sec = 0;
t.tv_usec = 0;
select(*c + 1, &rd, NULL, NULL, &t);
if (FD_ISSET(*c, &rd)) return TRUE;
else return (FALSE);
}
bool zsock_wait_unix(ip_connection *conn, int seconds)
{
struct timeval t;
fd_set rd;
int *c = conn->socket;
if (!conn->connected) return FALSE;
t.tv_sec = seconds;
t.tv_usec = 0;
FD_ZERO(&rd);
FD_SET(*c, &rd);
select(*c + 1, &rd, NULL, NULL, &t);
if (FD_ISSET(*c, &rd)) return TRUE;
else return (FALSE);
}
bool zsock_close_unix(ip_connection *conn)
{
int *c = conn->socket;
/* Already disconnected */
if (!conn->connected) return FALSE;
close(*c);
conn->connected = FALSE;
return TRUE;
}
bool zsock_write_unix(ip_connection *conn, cptr str, int *size)
{
int *c = conn->socket;
if (conn->server) return FALSE;
if (!conn->connected) return FALSE;
if ((*size = send(*c, str, (!*size) ? strlen(str) : *size, 0)) <= 0)
{
/* Oups connection died! */
if (conn->lost_conn) conn->lost_conn(conn);
zsock.close(conn);
return FALSE;
}
return TRUE;
}
bool zsock_read_unix(ip_connection *conn, char *str, int *len, bool raw)
{
char c;
int l = 0;
int *cc = conn->socket;
if (conn->server) return FALSE;
if (!conn->connected) return FALSE;
if (!raw)
{
/* This *IS* fucking slow */
while ((l < *len) && zsock_can_read_unix(conn))
{
if (recv(*cc, &c, 1, 0) <= 0)
{
/* Oups connection died! */
if (conn->lost_conn) conn->lost_conn(conn);
zsock.close(conn);
return FALSE;
}
if (c == '\r') continue;
if (c == '\n') break;
str[l++] = c;
}
str[l] = '\0';
*len = l;
return TRUE;
}
else
{
if ((*len = recv(*cc, str, *len, 0)) <= 0)
{
/* Oups connection died! */
if (conn->lost_conn) conn->lost_conn(conn);
zsock.close(conn);
return FALSE;
}
return TRUE;
}
}
bool zsock_accept_unix(ip_connection *conn, ip_connection *child)
{
int *s = conn->socket;
int sock;
struct sockaddr_in sin;
int len;
if (!conn->server) return FALSE;
if (!conn->connected) return FALSE;
len = sizeof(sin);
sock = accept(*s, (struct sockaddr*) & sin, &len);
if (sock == -1) return FALSE;
/* Initialize the connection with a fake destination */
zsock.setup(child, "127.0.0.1", 0, ZSOCK_TYPE_TCP, FALSE);
/* Set the correct socket */
*((int*)child->socket) = sock;
child->connected = TRUE;
return TRUE;
}
#endif
/* The zsock hook list */
zsock_hooks zsock;
/*
* Dummy hooks for systems without socks
*/
bool zsock_setup_dummy(ip_connection *conn, cptr conn_ip, int port, byte conn_type, bool server)
{
return FALSE;
}
bool zsock_unsetup_dummy(ip_connection *conn)
{
return FALSE;
}
bool zsock_open_dummy(ip_connection *conn)
{
return FALSE;
}
bool zsock_can_read_dummy(ip_connection *conn)
{
return (FALSE);
}
bool zsock_wait_dummy(ip_connection *conn, int seconds)
{
return (FALSE);
}
bool zsock_close_dummy(ip_connection *conn)
{
return FALSE;
}
bool zsock_write_dummy(ip_connection *conn, cptr str, int *size)
{
return FALSE;
}
bool zsock_read_dummy(ip_connection *conn, char *str, int *len, bool raw)
{
return FALSE;
}
bool zsock_accept_dummy(ip_connection *conn, ip_connection *child)
{
return FALSE;
}
bool zsock_add_timer_dummy(timer_callback callback)
{
return TRUE;
}
bool zsock_remove_timer_dummy(timer_callback callback)
{
return TRUE;
}
void dummy_socks()
{
zsock.setup = zsock_setup_dummy;
zsock.unsetup = zsock_unsetup_dummy;
zsock.open = zsock_open_dummy;
zsock.close = zsock_close_dummy;
zsock.write = zsock_write_dummy;
zsock.read = zsock_read_dummy;
zsock.accept = zsock_accept_dummy;
zsock.can_read = zsock_can_read_dummy;
zsock.wait = zsock_wait_dummy;
zsock.add_timer = zsock_add_timer_dummy;
zsock.remove_timer = zsock_remove_timer_dummy;
}
/*
* Initialize the hooks
*/
static bool init_once = TRUE;
bool zsock_init()
{
/* Sadly on some platforms we will be called 2 times ... */
if (init_once)
{
/* Set the timers */
zsock.__timers = 0;
zsock.__timer_callbacks = NULL;
init_once = FALSE;
}
/* Set the few system independants functions */
zsock.new_connection = zsock_new_connection;
zsock.free_connection = zsock_free_connection;
zsock.set_lose_connection = zsock_set_lose_connection;
zsock.write_simple = zsock_write_simple;
zsock.read_simple = zsock_read_simple;
#ifdef USE_WINSOCK
if (init_socks_win())
{
zsock.setup = zsock_setup_win;
zsock.unsetup = zsock_unsetup_win;
zsock.open = zsock_open_win;
zsock.close = zsock_close_win;
zsock.write = zsock_write_win;
zsock.read = zsock_read_win;
zsock.accept = zsock_accept_win;
zsock.can_read = zsock_can_read_win;
zsock.wait = zsock_wait_win;
zsock.add_timer = zsock_add_timer_win;
zsock.remove_timer = zsock_remove_timer_win;
return TRUE;
}
else
{
dummy_socks();
return TRUE;
}
#elif defined(USE_UNIXSOCK)
zsock.setup = zsock_setup_unix;
zsock.unsetup = zsock_unsetup_unix;
zsock.open = zsock_open_unix;
zsock.close = zsock_close_unix;
zsock.write = zsock_write_unix;
zsock.read = zsock_read_unix;
zsock.accept = zsock_accept_unix;
zsock.can_read = zsock_can_read_unix;
zsock.wait = zsock_wait_unix;
zsock.add_timer = zsock_add_timer_unix;
zsock.remove_timer = zsock_remove_timer_unix;
return TRUE;
#else
dummy_socks();
return TRUE;
#endif
}
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