mirror of
https://github.com/lunarmodules/luasocket.git
synced 2024-11-15 01:38:23 +01:00
320 lines
10 KiB
C
320 lines
10 KiB
C
/*=========================================================================*\
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* Socket compatibilization module for Win32
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* LuaSocket toolkit
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*
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* RCS ID: $Id$
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\*=========================================================================*/
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#include <string.h>
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#include "socket.h"
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/*-------------------------------------------------------------------------*\
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* Initializes module
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\*-------------------------------------------------------------------------*/
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int sock_open(void)
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{
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WSADATA wsaData;
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WORD wVersionRequested = MAKEWORD(2, 0);
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int err = WSAStartup(wVersionRequested, &wsaData );
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if (err != 0) return 0;
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if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 0) {
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WSACleanup();
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return 0;
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}
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return 1;
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}
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/*-------------------------------------------------------------------------*\
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* Close and inutilize socket
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\*-------------------------------------------------------------------------*/
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void sock_destroy(p_sock ps)
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{
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if (*ps != SOCK_INVALID) {
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closesocket(*ps);
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*ps = SOCK_INVALID;
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}
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}
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/*-------------------------------------------------------------------------*\
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*
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\*-------------------------------------------------------------------------*/
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void sock_shutdown(p_sock ps, int how)
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{
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shutdown(*ps, how);
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}
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/*-------------------------------------------------------------------------*\
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* Creates and sets up a socket
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\*-------------------------------------------------------------------------*/
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const char *sock_create(p_sock ps, int domain, int type, int protocol)
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{
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int val = 1;
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t_sock sock = socket(domain, type, protocol);
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if (sock == SOCK_INVALID) return sock_createstrerror();
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*ps = sock;
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sock_setnonblocking(ps);
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setsockopt(*ps, SOL_SOCKET, SO_REUSEADDR, (char *) &val, sizeof(val));
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return NULL;
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}
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/*-------------------------------------------------------------------------*\
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* Connects or returns error message
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\*-------------------------------------------------------------------------*/
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const char *sock_connect(p_sock ps, SA *addr, socklen_t addr_len)
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{
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if (connect(*ps, addr, addr_len) < 0) return sock_connectstrerror();
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else return NULL;
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}
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/*-------------------------------------------------------------------------*\
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* Binds or returns error message
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\*-------------------------------------------------------------------------*/
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const char *sock_bind(p_sock ps, SA *addr, socklen_t addr_len)
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{
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if (bind(*ps, addr, addr_len) < 0) return sock_bindstrerror();
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else return NULL;
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}
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/*-------------------------------------------------------------------------*\
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*
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\*-------------------------------------------------------------------------*/
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void sock_listen(p_sock ps, int backlog)
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{
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listen(*ps, backlog);
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}
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/*-------------------------------------------------------------------------*\
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* Accept with timeout
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\*-------------------------------------------------------------------------*/
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int sock_accept(p_sock ps, p_sock pa, SA *addr, socklen_t *addr_len,
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int timeout)
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{
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t_sock sock = *ps;
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struct timeval tv;
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SA dummy_addr;
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socklen_t dummy_len;
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fd_set fds;
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if (sock == SOCK_INVALID) return IO_CLOSED;
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tv.tv_sec = timeout / 1000;
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tv.tv_usec = (timeout % 1000) * 1000;
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FD_ZERO(&fds);
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FD_SET(sock, &fds);
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*pa = SOCK_INVALID;
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if (select(sock+1, &fds, NULL, NULL, timeout >= 0 ? &tv : NULL) <= 0)
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return IO_TIMEOUT;
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if (!addr) addr = &dummy_addr;
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if (!addr_len) addr_len = &dummy_len;
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*pa = accept(sock, addr, addr_len);
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if (*pa == SOCK_INVALID) return IO_ERROR;
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else return IO_DONE;
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}
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/*-------------------------------------------------------------------------*\
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* Send with timeout
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\*-------------------------------------------------------------------------*/
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int sock_send(p_sock ps, const char *data, size_t count, size_t *sent,
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int timeout)
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{
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t_sock sock = *ps;
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struct timeval tv;
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fd_set fds;
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ssize_t put = 0;
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if (sock == SOCK_INVALID) return IO_CLOSED;
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int err;
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int ret;
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tv.tv_sec = timeout / 1000;
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tv.tv_usec = (timeout % 1000) * 1000;
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FD_ZERO(&fds);
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FD_SET(sock, &fds);
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ret = select(sock+1, NULL, &fds, NULL, timeout >= 0 ? &tv : NULL);
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if (ret > 0) {
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put = send(sock, data, count, 0);
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if (put <= 0) {
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/* a bug in WinSock forces us to do a busy wait until we manage
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** to write, because select returns immediately even though it
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** should have blocked us until we could write... */
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if (WSAGetLastError() == WSAEWOULDBLOCK) err = IO_DONE;
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else err = IO_CLOSED;
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*sent = 0;
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} else {
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*sent = put;
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err = IO_DONE;
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}
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return err;
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} else {
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*sent = 0;
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return IO_TIMEOUT;
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}
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}
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/*-------------------------------------------------------------------------*\
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* Sendto with timeout
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\*-------------------------------------------------------------------------*/
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int sock_sendto(p_sock ps, const char *data, size_t count, size_t *sent,
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SA *addr, socklen_t addr_len, int timeout)
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{
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t_sock sock = *ps;
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struct timeval tv;
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fd_set fds;
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ssize_t put = 0;
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int err;
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int ret;
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if (sock == SOCK_INVALID) return IO_CLOSED;
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tv.tv_sec = timeout / 1000;
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tv.tv_usec = (timeout % 1000) * 1000;
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FD_ZERO(&fds);
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FD_SET(sock, &fds);
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ret = select(sock+1, NULL, &fds, NULL, timeout >= 0 ? &tv : NULL);
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if (ret > 0) {
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put = sendto(sock, data, count, 0, addr, addr_len);
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if (put <= 0) {
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/* a bug in WinSock forces us to do a busy wait until we manage
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** to write, because select returns immediately even though it
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** should have blocked us until we could write... */
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if (WSAGetLastError() == WSAEWOULDBLOCK) err = IO_DONE;
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else err = IO_CLOSED;
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*sent = 0;
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} else {
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*sent = put;
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err = IO_DONE;
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}
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return err;
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} else {
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*sent = 0;
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return IO_TIMEOUT;
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}
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}
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/*-------------------------------------------------------------------------*\
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* Receive with timeout
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\*-------------------------------------------------------------------------*/
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int sock_recv(p_sock ps, char *data, size_t count, size_t *got, int timeout)
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{
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t_sock sock = *ps;
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struct timeval tv;
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fd_set fds;
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int ret;
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ssize_t taken = 0;
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if (sock == SOCK_INVALID) return IO_CLOSED;
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tv.tv_sec = timeout / 1000;
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tv.tv_usec = (timeout % 1000) * 1000;
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FD_ZERO(&fds);
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FD_SET(sock, &fds);
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ret = select(sock+1, &fds, NULL, NULL, timeout >= 0 ? &tv : NULL);
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if (ret > 0) {
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taken = recv(sock, data, count, 0);
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if (taken <= 0) {
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*got = 0;
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return IO_CLOSED;
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} else {
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*got = taken;
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return IO_DONE;
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}
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} else {
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*got = 0;
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return IO_TIMEOUT;
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}
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}
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/*-------------------------------------------------------------------------*\
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* Recvfrom with timeout
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\*-------------------------------------------------------------------------*/
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int sock_recvfrom(p_sock ps, char *data, size_t count, size_t *got,
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SA *addr, socklen_t *addr_len, int timeout)
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{
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t_sock sock = *ps;
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struct timeval tv;
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fd_set fds;
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int ret;
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ssize_t taken = 0;
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if (sock == SOCK_INVALID) return IO_CLOSED;
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tv.tv_sec = timeout / 1000;
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tv.tv_usec = (timeout % 1000) * 1000;
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FD_ZERO(&fds);
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FD_SET(sock, &fds);
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ret = select(sock+1, &fds, NULL, NULL, timeout >= 0 ? &tv : NULL);
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if (ret > 0) {
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taken = recvfrom(sock, data, count, 0, addr, addr_len);
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if (taken <= 0) {
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*got = 0;
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return IO_CLOSED;
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} else {
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*got = taken;
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return IO_DONE;
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}
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} else {
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*got = 0;
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return IO_TIMEOUT;
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}
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}
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/*-------------------------------------------------------------------------*\
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* Put socket into blocking mode
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\*-------------------------------------------------------------------------*/
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void sock_setblocking(p_sock ps)
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{
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u_long argp = 0;
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ioctlsocket(*ps, FIONBIO, &argp);
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}
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/*-------------------------------------------------------------------------*\
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* Put socket into non-blocking mode
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\*-------------------------------------------------------------------------*/
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void sock_setnonblocking(p_sock ps)
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{
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u_long argp = 1;
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ioctlsocket(*ps, FIONBIO, &argp);
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}
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/*-------------------------------------------------------------------------*\
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* Error translation functions
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\*-------------------------------------------------------------------------*/
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const char *sock_hoststrerror(void)
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{
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switch (WSAGetLastError()) {
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case HOST_NOT_FOUND: return "host not found";
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case NO_ADDRESS: return "unable to resolve host name";
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case NO_RECOVERY: return "name server error";
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case TRY_AGAIN: return "name server unavailable, try again later.";
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default: return "unknown error";
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}
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}
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const char *sock_createstrerror(void)
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{
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switch (WSAGetLastError()) {
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case WSANOTINITIALISED: return "not initialized";
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case WSAENETDOWN: return "network is down";
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case WSAEMFILE: return "descriptor table is full";
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case WSAENOBUFS: return "insufficient buffer space";
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default: return "unknown error";
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}
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}
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const char *sock_bindstrerror(void)
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{
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switch (WSAGetLastError()) {
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case WSANOTINITIALISED: return "not initialized";
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case WSAENETDOWN: return "network is down";
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case WSAEADDRINUSE: return "address already in use";
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case WSAEINVAL: return "socket already bound";
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case WSAENOBUFS: return "too many connections";
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case WSAEFAULT: return "invalid address";
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case WSAENOTSOCK: return "not a socket descriptor";
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default: return "unknown error";
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}
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}
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const char *sock_connectstrerror(void)
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{
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switch (WSAGetLastError()) {
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case WSANOTINITIALISED: return "not initialized";
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case WSAENETDOWN: return "network is down";
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case WSAEADDRINUSE: return "address already in use";
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case WSAEADDRNOTAVAIL: return "address unavailable";
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case WSAECONNREFUSED: return "connection refused";
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case WSAENETUNREACH: return "network is unreachable";
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default: return "unknown error";
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}
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}
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