dany/luasocket
1
0
Fork 0
mirror of https://github.com/lunarmodules/luasocket.git synced 2024-07-01 10:59:46 +02:00
Code Issues Packages Projects Releases Wiki Activity

All input from sockets is now buffered. This has drastically

Browse Source 
improved line I/O. The code is much simpler now, too. All
timeout management has been rewritten.
This commit is contained in:
Diego Nehab 2001-01-13 07:10:00 +00:00
parent 17c4d1c305
commit 41643c2643
1 changed files with 274 additions and 322 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

596
src/luasocket.c
View File

@ -6,9 +6,7 @@
* Module: LUASOCKET.C
*
* This module is part of an effort to make the most important features
* of the TCP/IP protocol available for Lua scripts.
* The main intent of the project was the distribution with the CGILua
* toolkit, in which is is used to implement the SMTP client functions.
* of the TCP/IP protocol available to Lua scripts.
* The Lua interface to TCP/IP follows the BSD TCP/IP API closely,
* trying to simplify all tasks involved in setting up a client connection
* and simple server connections.
@ -21,16 +19,15 @@
/*=========================================================================*\
* Common include files
\*=========================================================================*/
#include <assert.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#include <assert.h>
#include <lua.h>
#include <lauxlib.h>
#include <lua.h>
#include <lualib.h>
#include "luasocket.h"
@ -41,11 +38,11 @@
#ifdef WIN32
#include <winsock2.h>
#include <winbase.h>
#else
/*=========================================================================*\
* BSD include files
\*=========================================================================*/
#else
/* close function */
#include <unistd.h>
/* fnctnl function and associated constants */
@ -100,6 +97,12 @@
#define NET_TIMEOUT 0 /* operation timed out */
#define NET_CLOSED 1 /* the connection has been closed */
/*-------------------------------------------------------------------------*\
* Time out mode to be checked
\*-------------------------------------------------------------------------*/
#define TM_RECEIVE 1
#define TM_SEND 2
/*-------------------------------------------------------------------------*\
* As far as a Lua script is concerned, there are two kind of objects
* representing a socket. A client socket is an object created by the
@ -107,7 +110,7 @@
* and close. A server socket is an object created by the function bind,
* and implementing the methods listen, accept and close. Lua tag values
* for these objects are created in the lua_socketlibopen function, and
* passed as closure values (first argumnents to every library function,
* passed as closure values (last argumnents to every library function)
# because we can't have any global variables.
\*-------------------------------------------------------------------------*/
#define CLIENT_TAG -2
@ -115,27 +118,30 @@
/*-------------------------------------------------------------------------*\
* Both socket types are stored in the same structure to simplify
* implementation. The tag value used is different, though. The timeout
* fields are not used for the server socket object.
* There are two timeout values. The block timeout specifies the maximum
* time the any IO operation performed by luasocket can be blocked waiting
* for completion. The return timeout specifies the maximum time a Lua script
* can be blocked waiting for an luasocket IO operation to complete.
* implementation. The tag value used is different, though.
* The timeout and buffer parameters are not used by server sockets.
\*-------------------------------------------------------------------------*/
typedef struct t_sock {
SOCKET sock; /* operating system socket object */
int b; /* block timeout in ms */
int r; /* return timeout in ms */
int blocking; /* is this socket in blocking mode? */
/* operating system socket object */
SOCKET sock;
/* start time of the current operation */
int tm_start;
#ifdef _DEBUG
/* end time of current operation, for debug purposes */
int tm_end;
#endif
/* return and blocking timeout values (-1 if no limit) */
int tm_return, tm_block;
/* buffered I/O storage */
unsigned char bf_buffer[LUASOCKET_BUFFERSIZE];
/* first and last red bytes not yet passed to application */
int bf_first, bf_last;
} t_sock;
typedef t_sock *p_sock;
/*-------------------------------------------------------------------------*\
* Macros and internal declarations
\*-------------------------------------------------------------------------*/
/* return time since marked start in ms */
#define time_since(start) (get_time()-start)
/* min and max macros */
#ifndef min
#define min(x, y) ((x) < (y) ? x : y)
@ -157,6 +163,24 @@ static int net_receive(lua_State *L);
static int net_timeout(lua_State *L);
static int net_close(lua_State *L);
/* buffered I/O management */
static const unsigned char *bf_receive(p_sock sock, int *length);
static void bf_skip(p_sock sock, int length);
static int bf_isempty(p_sock sock);
/* timeout management */
static int tm_timedout(p_sock sock, int mode);
static int tm_gettimeleft(p_sock sock);
static int tm_gettime(void);
static void tm_markstart(p_sock sock);
/* I/O */
static int send_raw(p_sock sock, const char *data, int wanted, int *err);
static int receive_raw(lua_State *L, p_sock sock, int wanted);
static int receive_dosline(lua_State *L, p_sock sock);
static int receive_unixline(lua_State *L, p_sock sock);
static int receive_all(lua_State *L, p_sock sock);
/* fallbacks */
static int server_gettable(lua_State *L);
static int client_gettable(lua_State *L);
@ -170,7 +194,7 @@ static p_sock check_sock(lua_State *L, int numArg, int server_tag,
static void pop_tags(lua_State *L, int *client_tag, int *server_tag);
static void push_tags(lua_State *L, int client_tag, int server_tag);
/* result handling routines */
/* error code translations functions */
static char *host_strerror(void);
static char *bind_strerror(void);
static char *sock_strerror(void);
@ -181,7 +205,6 @@ static void push_client(lua_State *L, p_sock sock, int client_tag);
static void push_server(lua_State *L, p_sock sock, int server_tag);
/* plataform specific functions */
static int get_time(void);
static void set_blocking(p_sock sock);
static void set_nonblocking(p_sock sock);
@ -190,19 +213,6 @@ static p_sock create_sock(void);
static p_sock create_tcpsock(void);
static int fill_sockaddr(struct sockaddr_in *server, const char *hostname,
unsigned short port);
static int get_timeout(p_sock sock, int elapsed);
static int read_or_timeout(p_sock sock, int elapsed);
static int write_or_timeout(p_sock sock, int elapsed);
static int send_raw(p_sock sock, const char *data, int wanted,
int start, int *err, int *end);
static void receive_raw(lua_State *L, p_sock sock, int wanted,
int start, int *err, int *end);
static void receive_dosline(lua_State *L, p_sock sock, int start,
int *err, int *end);
static void receive_unixline(lua_State *L, p_sock sock, int start,
int *err, int *end);
static void receive_all(lua_State *L, p_sock sock, int start,
int *err, int *end);
/*=========================================================================*\
* Test support functions
@ -214,7 +224,7 @@ static void receive_all(lua_State *L, p_sock sock, int start,
static int net_time(lua_State *L);
static int net_time(lua_State *L)
{
lua_pushnumber(L, get_time()/1000.0);
lua_pushnumber(L, tm_gettime()/1000.0);
return 1;
}
@ -279,6 +289,7 @@ static int net_connect(lua_State *L)
lua_pushstring(L, connect_strerror());
return 2;
}
set_nonblocking(sock);
push_client(L, sock, client_tag);
lua_pushnil(L);
return 2;
@ -341,6 +352,7 @@ static int net_accept(lua_State *L)
return 2;
} else {
client->sock = client_sock;
set_nonblocking(client);
push_client(L, client, client_tag);
lua_pushnil(L);
return 2;
@ -431,10 +443,10 @@ static int net_timeout(lua_State *L)
mode = luaL_opt_string(L, 3, "b");
switch (*mode) {
case 'b':
sock->b = ms;
sock->tm_block = ms;
break;
case 'r':
sock->r = ms;
sock->tm_return = ms;
break;
default:
luaL_arg_check(L, 0, 3, "invalid timeout mode");
@ -459,35 +471,26 @@ static int net_send(lua_State *L)
{
p_sock sock;
const char *data;
size_t size;
int start = get_time();
int wanted;
long total = 0;
int arg;
int err = NET_DONE;
int end;
int top;
int client_tag, server_tag;
pop_tags(L, &client_tag, &server_tag);
top = lua_gettop(L);
sock = check_client(L, 1, client_tag);
#ifdef _DEBUG_BLOCK
printf("luasocket: send start\n");
#endif
tm_markstart(sock);
for (arg = 2; arg <= top; arg++) {
data = luaL_opt_lstr(L, arg, NULL, &size);
if (!data || err != NET_DONE)
break;
total += send_raw(sock, data, size, start, &err, &end);
data = luaL_opt_lstr(L, arg, NULL, &wanted);
if (!data || err != NET_DONE) break;
total += send_raw(sock, data, wanted, &err);
}
push_error(L, err);
lua_pushnumber(L, (double) total);
#ifdef _DEBUG_BLOCK
printf("luasocket: send end\n");
#endif
#ifdef _DEBUG
/* pass the time elapsed during function execution to Lua, so that
** the test script can make sure we respected the timeouts */
lua_pushnumber(L, (end-start)/1000.0);
/* push time elapsed during operation as the last return value */
lua_pushnumber(L, (sock->tm_end - sock->tm_start)/1000.0);
#endif
return lua_gettop(L) - top;
}
@ -501,33 +504,31 @@ lua_pushnumber(L, (end-start)/1000.0);
* by a LF character, preceded or not by a CR character. This is
* the default pattern
* "*lu": reads a text line, terminanted by a CR character only. (Unix mode)
* "*a": reads until connection closed
* number: reads 'number' characters from the socket
* Returns
* On success: one string for each pattern
* On error: all strings for which there was no error, followed by one
* nil value for each failed string, followed by an error code
* nil value for the remaining strings, followed by an error code
\*-------------------------------------------------------------------------*/
static int net_receive(lua_State *L)
{
static const char *const modenames[] = {"*l", "*lu", "*a", NULL};
int err = NET_DONE, arg = 2;
int start = get_time();
int end;
const char *mode;
int client_tag, server_tag;
int top;
p_sock sock;
const char *mode;
pop_tags(L, &client_tag, &server_tag);
sock = check_client(L, 1, client_tag);
#ifdef _DEBUG_BLOCK
printf("luasocket: receive start\n");
#endif
tm_markstart(sock);
/* push default pattern */
top = lua_gettop(L);
if (top < 2) {
lua_pushstring(L, "*l");
top++;
}
/* receive all patterns */
for (arg = 2; arg <= top; arg++) {
/* if one pattern failed, we just skip all other patterns */
if (err != NET_DONE) {
@ -536,24 +537,24 @@ printf("luasocket: receive start\n");
}
if (lua_isnumber(L, arg)) {
long size = (long) lua_tonumber(L, arg);
receive_raw(L, sock, size, start, &err, &end);
err = receive_raw(L, sock, size);
} else {
mode = luaL_opt_string(L, arg, NULL);
/* get next pattern */
switch (luaL_findstring(mode, modenames)) {
/* DOS line mode */
case 0:
receive_dosline(L, sock, start, &err, &end);
err = receive_dosline(L, sock);
break;
/* Unix line mode */
case 1:
receive_unixline(L, sock, start, &err, &end);
err = receive_unixline(L, sock);
break;
/* 'Til closed mode */
/* until closed mode */
case 2:
receive_all(L, sock, start, &err, &end);
err = receive_all(L, sock);
break;
/* else it must be a number, raw mode */
/* else it is an error */
default:
luaL_arg_check(L, 0, arg, "invalid receive pattern");
break;
@ -562,13 +563,9 @@ printf("luasocket: receive start\n");
}
/* last return is an error code */
push_error(L, err);
#ifdef _DEBUG_BLOCK
printf("luasocket: receive end\n");
#endif
#ifdef _DEBUG
/* pass the time elapsed during function execution to Lua, so that
** the test script can make sure we respected the timeouts */
lua_pushnumber(L, (end-start)/1000.0);
/* push time elapsed during operation as the last return value */
lua_pushnumber(L, (sock->tm_end - sock->tm_start)/1000.0);
#endif
return lua_gettop(L) - top;
}
@ -598,8 +595,8 @@ static int net_close(lua_State *L)
\*-------------------------------------------------------------------------*/
static int client_gettable(lua_State *L)
{
static const char *const net_api[] = {"receive","send","timeout","close",
"connect", NULL};
static const char *const net_api[] =
{"receive","send","timeout","close", "connect", NULL};
const char *idx = luaL_check_string(L, 2);
int server_tag, client_tag;
pop_tags(L, &client_tag, &server_tag);
@ -700,12 +697,11 @@ static void handle_sigpipe(void)
static p_sock create_sock(void)
{
p_sock sock = (p_sock) malloc(sizeof(t_sock));
if (!sock)
return NULL;
if (!sock) return NULL;
sock->sock = -1;
sock->r = -1;
sock->b = -1;
sock->blocking = 1;
sock->tm_block = -1;
sock->tm_return = -1;
sock->bf_first = sock->bf_last = 0;
return sock;
}
@ -777,63 +773,27 @@ static int fill_sockaddr(struct sockaddr_in *address, const char *hostname,
}
/*-------------------------------------------------------------------------*\
* Determine the time limit to be passed to the select function, given
* the time elapsed since the beginning of the operation.
* Determines how much time we have left for the current io operation
* an IO write operation.
* Input
* sock: socket structure being used in operation
* elapsed: time elapsed since operation started
* Returns
* time limit before function return in ms or -1 in case there is no
* time limit
* the number of ms left or -1 if there is no time limit
\*-------------------------------------------------------------------------*/
static int get_timeout(p_sock sock, int elapsed)
static int tm_gettimeleft(p_sock sock)
{
/* no timeout */
if (sock->b < 0 && sock->r < 0)
if (sock->tm_block < 0 && sock->tm_return < 0)
return -1;
/* there is no block timeout, we use the return timeout */
if (sock->b < 0)
return max(0, sock->r - elapsed);
else if (sock->tm_block < 0)
return max(sock->tm_return - tm_gettime() + sock->tm_start, 0);
/* there is no return timeout, we use the block timeout */
else if (sock->r < 0)
return sock->b;
else if (sock->tm_return < 0)
return sock->tm_block;
/* both timeouts are specified */
else
return min(sock->b, max(0, sock->r - elapsed));
}
/*-------------------------------------------------------------------------*\
* Determines if we have a timeout condition or if we can proceed with
* an IO read operation.
* Input
* sock: socket structure being used in operation
* elapsed: time elapsed since operation started
* Returns
* 1 if we can proceed, 0 if a timeou has occured
\*-------------------------------------------------------------------------*/
static int read_or_timeout(p_sock sock, int elapsed)
{
fd_set set; /* file descriptor set */
struct timeval to; /* timeout structure */
int ms = get_timeout(sock, elapsed);
int err;
/* got timeout */
if (ms == 0)
return 0;
FD_ZERO(&set);
FD_SET(sock->sock, &set);
/* we have a limit on the time we can wait */
if (ms > 0) {
to.tv_sec = ms / 1000;
to.tv_usec = (ms % 1000) * 1000;
err = select(sock->sock+1, &set, NULL, NULL, &to);
set_nonblocking(sock);
/* we can wait forever */
} else {
err = select(sock->sock+1, &set, NULL, NULL, NULL);
set_blocking(sock);
}
return (err > 0);
else return min(sock->tm_block,
max(sock->tm_return - tm_gettime() + sock->tm_start, 0));
}
/*-------------------------------------------------------------------------*\
@ -841,33 +801,110 @@ static int read_or_timeout(p_sock sock, int elapsed)
* an IO write operation.
* Input
* sock: socket structure being used in operation
* elapsed: time elapsed since operation started
* mode: TM_RECEIVE or TM_SEND
* Returns
* 1 if we can proceed, 0 if a timeou has occured
* 1 if we can proceed, 0 if a timeout has occured
\*-------------------------------------------------------------------------*/
static int write_or_timeout(p_sock sock, int elapsed)
static int tm_timedout(p_sock sock, int mode)
{
fd_set set; /* file descriptor set */
struct timeval to; /* timeout structure */
int ms = get_timeout(sock, elapsed);
int err;
/* got timeout */
if (ms == 0)
return 0;
FD_ZERO(&set);
FD_SET(sock->sock, &set);
/* we have a limit on the time we can wait */
if (ms > 0) {
to.tv_sec = ms / 1000;
to.tv_usec = (ms % 1000) * 1000;
err = select(sock->sock+1, NULL, &set, NULL, &to);
set_nonblocking(sock);
/* we can wait forever */
} else {
err = select(sock->sock+1, NULL, &set, NULL, NULL);
set_blocking(sock);
fd_set fds;
int ret, delta;
fd_set *preadfds = NULL, *pwritefds = NULL;
struct timeval tm;
struct timeval *ptm = NULL;
/* find out how much time we have left, in ms */
int ms = tm_gettimeleft(sock);
/* fill file descriptor set */
FD_ZERO(&fds); FD_SET(sock->sock, &fds);
/* fill timeval structure */
tm.tv_sec = ms / 1000;
tm.tv_usec = (ms % 1000) * 1000;
/* define function parameters */
if (ms > 0) ptm = &tm; /* ptm == NULL when we don't have timeout */
if (mode == TM_RECEIVE) preadfds = &fds;
else pwritefds = &fds;
delta = tm_gettime();
/* see if we can read or write or if we timedout */
ret = select(sock->sock+1, preadfds, pwritefds, NULL, ptm);
#ifdef _DEBUG
/* store end time for this operation before calling select */
sock->tm_end = tm_gettime();
#endif
return ret <= 0;
}
/*-------------------------------------------------------------------------*\
* Marks the operation start time in sock structure
* Input
* sock: socket structure being used in operation
\*-------------------------------------------------------------------------*/
static void tm_markstart(p_sock sock)
{
sock->tm_start = tm_gettime();
#ifdef _DEBUG
sock->tm_end = sock->tm_start;
#endif
}
/*-------------------------------------------------------------------------*\
* Determines of there is any data in the read buffer
* Input
* sock: socket structure being used in operation
* Returns
* 1 if empty, 0 if there is data
\*-------------------------------------------------------------------------*/
static int bf_isempty(p_sock sock)
{
return sock->bf_first >= sock->bf_last;
}
/*-------------------------------------------------------------------------*\
* Skip a given number of bytes in read buffer
* Input
* sock: socket structure being used in operation
* length: number of bytes to skip
\*-------------------------------------------------------------------------*/
static void bf_skip(p_sock sock, int length)
{
sock->bf_first += length;
if (bf_isempty(sock)) sock->bf_first = sock->bf_last = 0;
}
/*-------------------------------------------------------------------------*\
* Return any data avilable in buffer, or get more data from transport layer
* if there is none.
* Input
* sock: socket structure being used in operation
* Output
* length: number of bytes available in buffer
* Returns
* pointer to start of data
\*-------------------------------------------------------------------------*/
static const unsigned char *bf_receive(p_sock sock, int *length)
{
if (bf_isempty(sock)) {
int got = recv(sock->sock, sock->bf_buffer, LUASOCKET_BUFFERSIZE, 0);
sock->bf_first = 0;
if (got >= 0) sock->bf_last = got;
else sock->bf_last = 0;
}
return (err > 0);
*length = sock->bf_last - sock->bf_first;
return sock->bf_buffer + sock->bf_first;
}
/*-------------------------------------------------------------------------*\
* Gets time in ms, relative to system startup.
* Returns
* time in ms.
\*-------------------------------------------------------------------------*/
static int tm_gettime(void)
{
#ifdef _WIN32
return GetTickCount();
#else
struct tms t;
return (times(&t)*1000)/CLK_TCK;
#endif
}
/*-------------------------------------------------------------------------*\
@ -877,49 +914,24 @@ static int write_or_timeout(p_sock sock, int elapsed)
* sock: socket structure being used in operation
* data: buffer to be sent
* wanted: number of bytes in buffer
* start: time the operation started, in ms
* Output
* err: operation error code. NET_DONE, NET_TIMEOUT or NET_CLOSED
* Returns
* Number of bytes written
\*-------------------------------------------------------------------------*/
static int send_raw(p_sock sock, const char *data, int wanted,
int start, int *err, int *end)
static int send_raw(p_sock sock, const char *data, int wanted, int *err)
{
int put = 0, total = 0;
*end = start;
while (wanted > 0) {
if(!write_or_timeout(sock, time_since(start))) {
#ifdef _DEBUG
*end = get_time();
#endif
if (tm_timedout(sock, TM_SEND)) {
*err = NET_TIMEOUT;
return total;
}
#ifdef _DEBUG
/* the lua_pushlstring function can take a long time to pass a large block
** to Lua, therefore, we mark the time before passing the result.
** also, the call to write or read might take longer then the time we had
** left, so that the end of the operation is marked before the last call
** to the OS */
*end = get_time();
#endif
put = send(sock->sock, data, wanted, 0);
if (put <= 0) {
#ifdef WIN32
/* on WinSock, a select over a socket on which there is a
** non-blocking operation pending returns immediately, even
** if the call would block. therefore, we have to do a busy
** wait here. */
if (WSAGetLastError() == WSAEWOULDBLOCK)
continue;
#endif
*err = NET_CLOSED;
return total;
}
#ifdef _DEBUG_BLOCK
printf("luasocket: sent %d, wanted %d, %dms elapsed\n", put, wanted, time_since(start));
#endif
wanted -= put;
data += put;
total += put;
@ -934,180 +946,146 @@ printf("luasocket: sent %d, wanted %d, %dms elapsed\n", put, wanted, time_since(
* Input
* sock: socket structure being used in operation
* wanted: number of bytes to be read
* start: time the operation started, in ms
* Output
* err: operation error code. NET_DONE, NET_TIMEOUT or NET_CLOSED
* Returns
* Number of bytes read
* operation error code. NET_DONE, NET_TIMEOUT or NET_CLOSED
\*-------------------------------------------------------------------------*/
#define MIN(x,y) ((x)<(y)?(x):(y))
static void receive_raw(lua_State *L, p_sock sock, int wanted, int start,
int *err, int *end)
static int receive_raw(lua_State *L, p_sock sock, int wanted)
{
int got = 0;
char *buffer = NULL;
const unsigned char *buffer = NULL;
luaL_Buffer b;
*end = start;
luaL_buffinit(L, &b);
while (wanted > 0) {
if(!read_or_timeout(sock, time_since(start))) {
#ifdef _DEBUG
*end = get_time();
#endif
*err = NET_TIMEOUT;
if (bf_isempty(sock) && tm_timedout(sock, TM_RECEIVE)) {
luaL_pushresult(&b);
return;
return NET_TIMEOUT;
}
#ifdef _DEBUG
*end = get_time();
#endif
buffer = luaL_prepbuffer(&b);
got = recv(sock->sock, buffer, MIN(wanted, LUAL_BUFFERSIZE), 0);
#ifdef _DEBUG_BLOCK
printf("luasocket: wanted %d, got %d, %dms elapsed\n", wanted, got, time_since(start));
#endif
buffer = bf_receive(sock, &got);
if (got <= 0) {
*err = NET_CLOSED;
luaL_pushresult(&b);
return;
return NET_CLOSED;
}
got = min(got, wanted);
luaL_addlstring(&b, buffer, got);
bf_skip(sock, got);
wanted -= got;
luaL_addsize(&b, got);
}
*err = NET_DONE;
luaL_pushresult(&b);
return NET_DONE;
}
/*-------------------------------------------------------------------------*\
* Reads everything until the connection is closed
* Input
* sock: socket structure being used in operation
* start: time the operation started, in ms
* Output
* err: operation error code. NET_DONE, NET_TIMEOUT or NET_CLOSED
* Result
* a string is pushed into the Lua stack with the line just read
* operation error code. NET_DONE, NET_TIMEOUT or NET_CLOSED
\*-------------------------------------------------------------------------*/
static void receive_all(lua_State *L, p_sock sock, int start,
int *err, int *end)
static int receive_all(lua_State *L, p_sock sock)
{
int got;
char *buffer;
int got = 0;
const unsigned char *buffer = NULL;
luaL_Buffer b;
*end = start;
luaL_buffinit(L, &b);
for ( ;; ) {
buffer = luaL_prepbuffer(&b);
if (read_or_timeout(sock, time_since(start))) {
#ifdef _DEBUG
*end = get_time();
#endif
got = recv(sock->sock, buffer, LUAL_BUFFERSIZE, 0);
if (bf_isempty(sock) && tm_timedout(sock, TM_RECEIVE)) {
buffer = bf_receive(sock, &got);
if (got <= 0) {
*err = NET_DONE;
break;
luaL_pushresult(&b);
return NET_DONE;
}
luaL_addsize(&b, got);
luaL_addlstring(&b, buffer, got);
} else {
*err = NET_TIMEOUT;
break;
luaL_pushresult(&b);
return NET_TIMEOUT;
}
}
luaL_pushresult(&b);
}
/*-------------------------------------------------------------------------*\
* Reads a line terminated by a CR LF pair or just by a LF. The CR and LF
* are not returned by the function. All operations are non-blocking and the
* function respects the timeout values in sock.
* are not returned by the function and are discarded from the stream. All
* operations are non-blocking and the function respects the timeout
* values in sock.
* Input
* sock: socket structure being used in operation
* wanted: number of bytes in buffer
* start: time the operation started, in ms
* Output
* data: pointer to an internal buffer containing the data read
* err: operation error code. NET_DONE, NET_TIMEOUT or NET_CLOSED
* Result
* a string is pushed into the Lua stack with the line just read
* operation error code. NET_DONE, NET_TIMEOUT or NET_CLOSED
\*-------------------------------------------------------------------------*/
static void receive_dosline(lua_State *L, p_sock sock, int start,
int *err, int *end)
static int receive_dosline(lua_State *L, p_sock sock)
{
char c = ' ';
long got = 0;
int got = 0;
const unsigned char *buffer = NULL;
luaL_Buffer b;
*end = start;
luaL_buffinit(L, &b);
for ( ;; ) {
if (read_or_timeout(sock, time_since(start))) {
#ifdef _DEBUG
*end = get_time();
#endif
got = recv(sock->sock, &c, 1, 0);
if (got <= 0) {
*err = NET_CLOSED;
break;
}
if (c != '\n') {
if (c != '\r') luaL_putchar(&b, c);
} else {
*err = NET_DONE;
break;
if (bf_isempty(sock) && tm_timedout(sock, TM_RECEIVE)) {
luaL_pushresult(&b);
return NET_TIMEOUT;
}
buffer = bf_receive(sock, &got);
if (got > 0) {
int len = 0, end = 1;
while (len < got) {
if (buffer[len] == '\n') { /* found eol */
if (len > 0 && buffer[len-1] == '\r') {
end++; len--;
}
luaL_addlstring(&b, buffer, len);
bf_skip(sock, len + end); /* skip '\r\n' in stream */
luaL_pushresult(&b);
return NET_DONE;
}
len++;
}
luaL_addlstring(&b, buffer, got);
bf_skip(sock, got);
} else {
*err = NET_TIMEOUT;
break;
luaL_pushresult(&b);
return NET_CLOSED;
}
}
luaL_pushresult(&b);
}
/*-------------------------------------------------------------------------*\
* Reads a line terminated by a LF character, which is not returned by
* the function. All operations are non-blocking and the function respects
* the timeout values in sock.
* the function, and is skipped in the stream. All operations are
* non-blocking and the function respects the timeout values in sock.
* Input
* sock: socket structure being used in operation
* wanted: number of bytes in buffer
* start: time the operation started, in ms
* Output
* data: pointer to an internal buffer containing the data read
* err: operation error code. NET_DONE, NET_TIMEOUT or NET_CLOSED
* Returns
* Number of bytes read
* operation error code. NET_DONE, NET_TIMEOUT or NET_CLOSED
\*-------------------------------------------------------------------------*/
static void receive_unixline(lua_State *L, p_sock sock, int start,
int *err, int *end)
static int receive_unixline(lua_State *L, p_sock sock)
{
char c = ' ';
long got = 0;
long size = 0;
int got = 0;
const unsigned char *buffer = NULL;
luaL_Buffer b;
*end = start;
luaL_buffinit(L, &b);
for ( ;; ) {
if (read_or_timeout(sock, time_since(start))) {
#ifdef _DEBUG
*end = get_time();
#endif
got = recv(sock->sock, &c, 1, 0);
if (got <= 0) {
*err = NET_CLOSED;
break;
}
if (c != '\n') {
luaL_putchar(&b, c);
size++;
} else {
*err = NET_DONE;
break;
if (bf_isempty(sock) && tm_timedout(sock, TM_RECEIVE)) {
luaL_pushresult(&b);
return NET_TIMEOUT;
}
buffer = bf_receive(sock, &got);
if (got > 0) {
int len = 0;
while (len < got) {
if (buffer[len] == '\n') { /* found eol */
luaL_addlstring(&b, buffer, len);
bf_skip(sock, len + 1); /* skip '\n' in stream */
luaL_pushresult(&b);
return NET_DONE;
}
len++;
}
luaL_addlstring(&b, buffer, got);
bf_skip(sock, got);
} else {
*err = NET_TIMEOUT;
break;
luaL_pushresult(&b);
return NET_CLOSED;
}
}
luaL_pushresult(&b);
}
/*-------------------------------------------------------------------------*\
@ -1204,15 +1182,6 @@ static int wsock_open(void)
return 1;
}
/*-------------------------------------------------------------------------*\
* Gets time in ms, relative to system startup.
* Returns
* time in ms.
\*-------------------------------------------------------------------------*/
static int get_time(void)
{
return GetTickCount();
}
/*-------------------------------------------------------------------------*\
* Put socket into blocking mode.
@ -1303,28 +1272,14 @@ static char *connect_strerror(void)
/*=========================================================================*\
* BSD specific functions.
\*=========================================================================*/
/*-------------------------------------------------------------------------*\
* Gets time in ms, relative to system startup.
* Returns
* time in ms.
\*-------------------------------------------------------------------------*/
static int get_time(void)
{
struct tms t;
return (times(&t)*1000)/CLK_TCK;
}
/*-------------------------------------------------------------------------*\
* Put socket into blocking mode.
\*-------------------------------------------------------------------------*/
static void set_blocking(p_sock sock)
{
if (!sock->blocking) {
int flags = fcntl(sock->sock, F_GETFL, 0);
flags &= (~(O_NONBLOCK));
fcntl(sock->sock, F_SETFL, flags);
sock->blocking = 1;
}
int flags = fcntl(sock->sock, F_GETFL, 0);
flags &= (~(O_NONBLOCK));
fcntl(sock->sock, F_SETFL, flags);
}
/*-------------------------------------------------------------------------*\
@ -1332,12 +1287,9 @@ static void set_blocking(p_sock sock)
\*-------------------------------------------------------------------------*/
static void set_nonblocking(p_sock sock)
{
if (sock->blocking) {
int flags = fcntl(sock->sock, F_GETFL, 0);
flags |= O_NONBLOCK;
fcntl(sock->sock, F_SETFL, flags);
sock->blocking = 0;
}
int flags = fcntl(sock->sock, F_GETFL, 0);
flags |= O_NONBLOCK;
fcntl(sock->sock, F_SETFL, flags);
}
/*-------------------------------------------------------------------------*\