初始化提交
This commit is contained in:
457
Plugins/slua_unreal/External/luasocket/usocket.cpp
vendored
Normal file
457
Plugins/slua_unreal/External/luasocket/usocket.cpp
vendored
Normal file
@ -0,0 +1,457 @@
|
||||
/*=========================================================================*\
|
||||
* Socket compatibilization module for Unix
|
||||
* LuaSocket toolkit
|
||||
*
|
||||
* The code is now interrupt-safe.
|
||||
* The penalty of calling select to avoid busy-wait is only paid when
|
||||
* the I/O call fail in the first place.
|
||||
\*=========================================================================*/
|
||||
#include <string.h>
|
||||
#include <signal.h>
|
||||
|
||||
#include "socket.h"
|
||||
|
||||
#ifndef _WIN32
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Wait for readable/writable/connected socket with timeout
|
||||
\*-------------------------------------------------------------------------*/
|
||||
#ifndef SOCKET_SELECT
|
||||
#include <sys/poll.h>
|
||||
|
||||
namespace NS_SLUA {
|
||||
|
||||
#define WAITFD_R POLLIN
|
||||
#define WAITFD_W POLLOUT
|
||||
#define WAITFD_C (POLLIN|POLLOUT)
|
||||
int socket_waitfd(p_socket ps, int sw, p_timeout tm) {
|
||||
int ret;
|
||||
struct pollfd pfd;
|
||||
pfd.fd = *ps;
|
||||
pfd.events = sw;
|
||||
pfd.revents = 0;
|
||||
if (timeout_iszero(tm)) return IO_TIMEOUT; /* optimize timeout == 0 case */
|
||||
do {
|
||||
int t = (int)(timeout_getretry(tm)*1e3);
|
||||
ret = poll(&pfd, 1, t >= 0? t: -1);
|
||||
} while (ret == -1 && errno == EINTR);
|
||||
if (ret == -1) return errno;
|
||||
if (ret == 0) return IO_TIMEOUT;
|
||||
if (sw == WAITFD_C && (pfd.revents & (POLLIN|POLLERR))) return IO_CLOSED;
|
||||
return IO_DONE;
|
||||
}
|
||||
#else
|
||||
|
||||
#define WAITFD_R 1
|
||||
#define WAITFD_W 2
|
||||
#define WAITFD_C (WAITFD_R|WAITFD_W)
|
||||
|
||||
int socket_waitfd(p_socket ps, int sw, p_timeout tm) {
|
||||
int ret;
|
||||
fd_set rfds, wfds, *rp, *wp;
|
||||
struct timeval tv, *tp;
|
||||
double t;
|
||||
if (*ps >= FD_SETSIZE) return EINVAL;
|
||||
if (timeout_iszero(tm)) return IO_TIMEOUT; /* optimize timeout == 0 case */
|
||||
do {
|
||||
/* must set bits within loop, because select may have modifed them */
|
||||
rp = wp = NULL;
|
||||
if (sw & WAITFD_R) { FD_ZERO(&rfds); FD_SET(*ps, &rfds); rp = &rfds; }
|
||||
if (sw & WAITFD_W) { FD_ZERO(&wfds); FD_SET(*ps, &wfds); wp = &wfds; }
|
||||
t = timeout_getretry(tm);
|
||||
tp = NULL;
|
||||
if (t >= 0.0) {
|
||||
tv.tv_sec = (int)t;
|
||||
tv.tv_usec = (int)((t-tv.tv_sec)*1.0e6);
|
||||
tp = &tv;
|
||||
}
|
||||
ret = select(*ps+1, rp, wp, NULL, tp);
|
||||
} while (ret == -1 && errno == EINTR);
|
||||
if (ret == -1) return errno;
|
||||
if (ret == 0) return IO_TIMEOUT;
|
||||
if (sw == WAITFD_C && FD_ISSET(*ps, &rfds)) return IO_CLOSED;
|
||||
return IO_DONE;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Initializes module
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_open(void) {
|
||||
/* instals a handler to ignore sigpipe or it will crash us */
|
||||
signal(SIGPIPE, SIG_IGN);
|
||||
return 1;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Close module
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_close(void) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Close and inutilize socket
|
||||
\*-------------------------------------------------------------------------*/
|
||||
void socket_destroy(p_socket ps) {
|
||||
if (*ps != SOCKET_INVALID) {
|
||||
socket_setblocking(ps);
|
||||
close(*ps);
|
||||
*ps = SOCKET_INVALID;
|
||||
}
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Select with timeout control
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_select(t_socket n, fd_set *rfds, fd_set *wfds, fd_set *efds,
|
||||
p_timeout tm) {
|
||||
int ret;
|
||||
do {
|
||||
struct timeval tv;
|
||||
double t = timeout_getretry(tm);
|
||||
tv.tv_sec = (int) t;
|
||||
tv.tv_usec = (int) ((t - tv.tv_sec) * 1.0e6);
|
||||
/* timeout = 0 means no wait */
|
||||
ret = select(n, rfds, wfds, efds, t >= 0.0 ? &tv: NULL);
|
||||
} while (ret < 0 && errno == EINTR);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Creates and sets up a socket
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_create(p_socket ps, int domain, int type, int protocol) {
|
||||
*ps = socket(domain, type, protocol);
|
||||
if (*ps != SOCKET_INVALID) return IO_DONE;
|
||||
else return errno;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Binds or returns error message
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_bind(p_socket ps, SA *addr, socklen_t len) {
|
||||
int err = IO_DONE;
|
||||
socket_setblocking(ps);
|
||||
if (bind(*ps, addr, len) < 0) err = errno;
|
||||
socket_setnonblocking(ps);
|
||||
return err;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
*
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_listen(p_socket ps, int backlog) {
|
||||
int err = IO_DONE;
|
||||
socket_setblocking(ps);
|
||||
if (listen(*ps, backlog)) err = errno;
|
||||
socket_setnonblocking(ps);
|
||||
return err;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
*
|
||||
\*-------------------------------------------------------------------------*/
|
||||
void socket_shutdown(p_socket ps, int how) {
|
||||
socket_setblocking(ps);
|
||||
shutdown(*ps, how);
|
||||
socket_setnonblocking(ps);
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Connects or returns error message
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_connect(p_socket ps, SA *addr, socklen_t len, p_timeout tm) {
|
||||
int err;
|
||||
/* avoid calling on closed sockets */
|
||||
if (*ps == SOCKET_INVALID) return IO_CLOSED;
|
||||
/* call connect until done or failed without being interrupted */
|
||||
do if (connect(*ps, addr, len) == 0) return IO_DONE;
|
||||
while ((err = errno) == EINTR);
|
||||
/* if connection failed immediately, return error code */
|
||||
if (err != EINPROGRESS && err != EAGAIN) return err;
|
||||
/* zero timeout case optimization */
|
||||
if (timeout_iszero(tm)) return IO_TIMEOUT;
|
||||
/* wait until we have the result of the connection attempt or timeout */
|
||||
err = socket_waitfd(ps, WAITFD_C, tm);
|
||||
if (err == IO_CLOSED) {
|
||||
if (recv(*ps, (char *) &err, 0, 0) == 0) return IO_DONE;
|
||||
else return errno;
|
||||
} else return err;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Accept with timeout
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_accept(p_socket ps, p_socket pa, SA *addr, socklen_t *len, p_timeout tm) {
|
||||
if (*ps == SOCKET_INVALID) return IO_CLOSED;
|
||||
for ( ;; ) {
|
||||
int err;
|
||||
if ((*pa = accept(*ps, addr, len)) != SOCKET_INVALID) return IO_DONE;
|
||||
err = errno;
|
||||
if (err == EINTR) continue;
|
||||
if (err != EAGAIN && err != ECONNABORTED) return err;
|
||||
if ((err = socket_waitfd(ps, WAITFD_R, tm)) != IO_DONE) return err;
|
||||
}
|
||||
/* can't reach here */
|
||||
return IO_UNKNOWN;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Send with timeout
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_send(p_socket ps, const char *data, size_t count,
|
||||
size_t *sent, p_timeout tm)
|
||||
{
|
||||
int err;
|
||||
*sent = 0;
|
||||
/* avoid making system calls on closed sockets */
|
||||
if (*ps == SOCKET_INVALID) return IO_CLOSED;
|
||||
/* loop until we send something or we give up on error */
|
||||
for ( ;; ) {
|
||||
long put = (long) send(*ps, data, count, 0);
|
||||
/* if we sent anything, we are done */
|
||||
if (put >= 0) {
|
||||
*sent = put;
|
||||
return IO_DONE;
|
||||
}
|
||||
err = errno;
|
||||
/* EPIPE means the connection was closed */
|
||||
if (err == EPIPE) return IO_CLOSED;
|
||||
/* we call was interrupted, just try again */
|
||||
if (err == EINTR) continue;
|
||||
/* if failed fatal reason, report error */
|
||||
if (err != EAGAIN) return err;
|
||||
/* wait until we can send something or we timeout */
|
||||
if ((err = socket_waitfd(ps, WAITFD_W, tm)) != IO_DONE) return err;
|
||||
}
|
||||
/* can't reach here */
|
||||
return IO_UNKNOWN;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Sendto with timeout
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_sendto(p_socket ps, const char *data, size_t count, size_t *sent,
|
||||
SA *addr, socklen_t len, p_timeout tm)
|
||||
{
|
||||
int err;
|
||||
*sent = 0;
|
||||
if (*ps == SOCKET_INVALID) return IO_CLOSED;
|
||||
for ( ;; ) {
|
||||
long put = (long) sendto(*ps, data, count, 0, addr, len);
|
||||
if (put >= 0) {
|
||||
*sent = put;
|
||||
return IO_DONE;
|
||||
}
|
||||
err = errno;
|
||||
if (err == EPIPE) return IO_CLOSED;
|
||||
if (err == EINTR) continue;
|
||||
if (err != EAGAIN) return err;
|
||||
if ((err = socket_waitfd(ps, WAITFD_W, tm)) != IO_DONE) return err;
|
||||
}
|
||||
return IO_UNKNOWN;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Receive with timeout
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_recv(p_socket ps, char *data, size_t count, size_t *got, p_timeout tm) {
|
||||
int err;
|
||||
*got = 0;
|
||||
if (*ps == SOCKET_INVALID) return IO_CLOSED;
|
||||
for ( ;; ) {
|
||||
long taken = (long) recv(*ps, data, count, 0);
|
||||
if (taken > 0) {
|
||||
*got = taken;
|
||||
return IO_DONE;
|
||||
}
|
||||
err = errno;
|
||||
if (taken == 0) return IO_CLOSED;
|
||||
if (err == EINTR) continue;
|
||||
if (err != EAGAIN) return err;
|
||||
if ((err = socket_waitfd(ps, WAITFD_R, tm)) != IO_DONE) return err;
|
||||
}
|
||||
return IO_UNKNOWN;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Recvfrom with timeout
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_recvfrom(p_socket ps, char *data, size_t count, size_t *got,
|
||||
SA *addr, socklen_t *len, p_timeout tm) {
|
||||
int err;
|
||||
*got = 0;
|
||||
if (*ps == SOCKET_INVALID) return IO_CLOSED;
|
||||
for ( ;; ) {
|
||||
long taken = (long) recvfrom(*ps, data, count, 0, addr, len);
|
||||
if (taken > 0) {
|
||||
*got = taken;
|
||||
return IO_DONE;
|
||||
}
|
||||
err = errno;
|
||||
if (taken == 0) return IO_CLOSED;
|
||||
if (err == EINTR) continue;
|
||||
if (err != EAGAIN) return err;
|
||||
if ((err = socket_waitfd(ps, WAITFD_R, tm)) != IO_DONE) return err;
|
||||
}
|
||||
return IO_UNKNOWN;
|
||||
}
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Write with timeout
|
||||
*
|
||||
* socket_read and socket_write are cut-n-paste of socket_send and socket_recv,
|
||||
* with send/recv replaced with write/read. We can't just use write/read
|
||||
* in the socket version, because behaviour when size is zero is different.
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_write(p_socket ps, const char *data, size_t count,
|
||||
size_t *sent, p_timeout tm)
|
||||
{
|
||||
int err;
|
||||
*sent = 0;
|
||||
/* avoid making system calls on closed sockets */
|
||||
if (*ps == SOCKET_INVALID) return IO_CLOSED;
|
||||
/* loop until we send something or we give up on error */
|
||||
for ( ;; ) {
|
||||
long put = (long) write(*ps, data, count);
|
||||
/* if we sent anything, we are done */
|
||||
if (put >= 0) {
|
||||
*sent = put;
|
||||
return IO_DONE;
|
||||
}
|
||||
err = errno;
|
||||
/* EPIPE means the connection was closed */
|
||||
if (err == EPIPE) return IO_CLOSED;
|
||||
/* we call was interrupted, just try again */
|
||||
if (err == EINTR) continue;
|
||||
/* if failed fatal reason, report error */
|
||||
if (err != EAGAIN) return err;
|
||||
/* wait until we can send something or we timeout */
|
||||
if ((err = socket_waitfd(ps, WAITFD_W, tm)) != IO_DONE) return err;
|
||||
}
|
||||
/* can't reach here */
|
||||
return IO_UNKNOWN;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Read with timeout
|
||||
* See note for socket_write
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_read(p_socket ps, char *data, size_t count, size_t *got, p_timeout tm) {
|
||||
int err;
|
||||
*got = 0;
|
||||
if (*ps == SOCKET_INVALID) return IO_CLOSED;
|
||||
for ( ;; ) {
|
||||
long taken = (long) read(*ps, data, count);
|
||||
if (taken > 0) {
|
||||
*got = taken;
|
||||
return IO_DONE;
|
||||
}
|
||||
err = errno;
|
||||
if (taken == 0) return IO_CLOSED;
|
||||
if (err == EINTR) continue;
|
||||
if (err != EAGAIN) return err;
|
||||
if ((err = socket_waitfd(ps, WAITFD_R, tm)) != IO_DONE) return err;
|
||||
}
|
||||
return IO_UNKNOWN;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Put socket into blocking mode
|
||||
\*-------------------------------------------------------------------------*/
|
||||
void socket_setblocking(p_socket ps) {
|
||||
int flags = fcntl(*ps, F_GETFL, 0);
|
||||
flags &= (~(O_NONBLOCK));
|
||||
fcntl(*ps, F_SETFL, flags);
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Put socket into non-blocking mode
|
||||
\*-------------------------------------------------------------------------*/
|
||||
void socket_setnonblocking(p_socket ps) {
|
||||
int flags = fcntl(*ps, F_GETFL, 0);
|
||||
flags |= O_NONBLOCK;
|
||||
fcntl(*ps, F_SETFL, flags);
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* DNS helpers
|
||||
\*-------------------------------------------------------------------------*/
|
||||
int socket_gethostbyaddr(const char *addr, socklen_t len, struct hostent **hp) {
|
||||
*hp = gethostbyaddr(addr, len, AF_INET);
|
||||
if (*hp) return IO_DONE;
|
||||
else if (h_errno) return h_errno;
|
||||
else if (errno) return errno;
|
||||
else return IO_UNKNOWN;
|
||||
}
|
||||
|
||||
int socket_gethostbyname(const char *addr, struct hostent **hp) {
|
||||
*hp = gethostbyname(addr);
|
||||
if (*hp) return IO_DONE;
|
||||
else if (h_errno) return h_errno;
|
||||
else if (errno) return errno;
|
||||
else return IO_UNKNOWN;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*\
|
||||
* Error translation functions
|
||||
* Make sure important error messages are standard
|
||||
\*-------------------------------------------------------------------------*/
|
||||
const char *socket_hoststrerror(int err) {
|
||||
if (err <= 0) return io_strerror(err);
|
||||
switch (err) {
|
||||
case HOST_NOT_FOUND: return "host not found";
|
||||
default: return hstrerror(err);
|
||||
}
|
||||
}
|
||||
|
||||
const char *socket_strerror(int err) {
|
||||
if (err <= 0) return io_strerror(err);
|
||||
switch (err) {
|
||||
case EADDRINUSE: return "address already in use";
|
||||
case EISCONN: return "already connected";
|
||||
case EACCES: return "permission denied";
|
||||
case ECONNREFUSED: return "connection refused";
|
||||
case ECONNABORTED: return "closed";
|
||||
case ECONNRESET: return "closed";
|
||||
case ETIMEDOUT: return "timeout";
|
||||
default: return strerror(err);
|
||||
}
|
||||
}
|
||||
|
||||
const char *socket_ioerror(p_socket ps, int err) {
|
||||
(void) ps;
|
||||
return socket_strerror(err);
|
||||
}
|
||||
|
||||
const char *socket_gaistrerror(int err) {
|
||||
if (err == 0) return NULL;
|
||||
switch (err) {
|
||||
case EAI_AGAIN: return "temporary failure in name resolution";
|
||||
case EAI_BADFLAGS: return "invalid value for ai_flags";
|
||||
#ifdef EAI_BADHINTS
|
||||
case EAI_BADHINTS: return "invalid value for hints";
|
||||
#endif
|
||||
case EAI_FAIL: return "non-recoverable failure in name resolution";
|
||||
case EAI_FAMILY: return "ai_family not supported";
|
||||
case EAI_MEMORY: return "memory allocation failure";
|
||||
case EAI_NONAME:
|
||||
return "host or service not provided, or not known";
|
||||
case EAI_OVERFLOW: return "argument buffer overflow";
|
||||
#ifdef EAI_PROTOCOL
|
||||
case EAI_PROTOCOL: return "resolved protocol is unknown";
|
||||
#endif
|
||||
case EAI_SERVICE: return "service not supported for socket type";
|
||||
case EAI_SOCKTYPE: return "ai_socktype not supported";
|
||||
case EAI_SYSTEM: return strerror(errno);
|
||||
default: return gai_strerror(err);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
} // end NS_SLUA
|
||||
|
||||
#endif // _WIN32
|
||||
Reference in New Issue
Block a user