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CNFGHTTP.c
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//Copyright 2015-2021 <>< Charles Lohr Under the MIT/x11 License, NewBSD License or
// ColorChord License. You Choose. This file mostly based on `cnhttp` from cntools.
#ifdef CNFGHTTP
//Pull from a buffer
#ifndef CNFGHTTP_LIVE_FS
#define USE_RAM_MFS
#endif
//single_file_http.c base from https://github.com/cntools/httptest.
//scroll to bottom for implementation.
#ifndef CUSTOM_HTTPHEADER_CODE
#define CUSTOM_HTTPHEADER_CODE PushString("Access-Control-Allow-Origin: *\r\n");
#endif
/* public api for steve reid's public domain SHA-1 implementation */
/* this file is in the public domain */
#include <stdint.h>
#include <malloc.h>
typedef struct {
uint32_t state[5];
uint32_t count[2];
uint8_t buffer[64];
} RD_SHA1_CTX;
#define RD_SHA1_DIGEST_SIZE 20
void static RD_SHA1_Init(RD_SHA1_CTX* context);
void static RD_SHA1_Update(RD_SHA1_CTX* context, const uint8_t* data, const unsigned long len);
void static RD_SHA1_Final(uint8_t digest[RD_SHA1_DIGEST_SIZE],RD_SHA1_CTX* context); //WARNINGThe parameters are flipped here. (CNL)
//Not to be confused with MFS for the AVR.
#ifndef _MFS_H
#define _MFS_H
#ifndef USE_RAM_MFS
#include <stdio.h>
#endif
#define MFS_SECTOR 256
#define MFS_FILENAMELEN 32-8
#define MFS_FILE_COMPRESSED_MEMORY (-2)
//Format:
// [FILE NAME (24)] [Start (4)] [Len (4)]
// NOTE: Filename must be null-terminated within the 24.
struct MFSFileEntry
{
char name[MFS_FILENAMELEN];
uint32_t start; //From beginning of mfs thing.
uint32_t len;
};
struct MFSFileInfo
{
uint32_t filelen;
#ifdef USE_RAM_MFS
uint32_t offset;
#else
FILE * file;
#endif
};
//Returns 0 on succses.
//Returns size of file if non-empty
//If positive, populates mfi.
//Returns -1 if can't find file or reached end of file list.
int8_t MFSOpenFile( const char * fname, struct MFSFileInfo * mfi );
int32_t MFSReadSector( uint8_t* data, struct MFSFileInfo * mfi ); //returns # of bytes left in file.
void MFSClose( struct MFSFileInfo * mfi );
#endif
#ifndef _CNHTTP_H
#define _CNHTTP_H
#include <stdint.h>
extern struct HTTPConnection * curhttp;
extern uint8_t * curdata;
extern uint16_t curlen;
extern uint8_t wsmask[4];
extern uint8_t wsmaskplace;
uint8_t WSPOPMASK();
#define HTTPPOP (*curdata++)
//You must provide this.
void HTTPCustomStart( );
void HTTPCustomCallback( ); //called when we can send more data
void WebSocketData( int len );
void WebSocketTick( );
void WebSocketNew();
void HTTPHandleInternalCallback( );
uint8_t hex2byte( const char * c );
void NewWebSocket();
void et_espconn_disconnect( int socket );
//Internal Functions
void HTTPTick( uint8_t timedtick );
int URLDecode( char * decodeinto, int maxlen, const char * buf );
void WebSocketGotData( uint8_t c );
void WebSocketTickInternal();
void WebSocketSend( uint8_t * data, int size );
//Host-level functions
void my_base64_encode(const unsigned char *data, unsigned int input_length, uint8_t * encoded_data );
void Uint32To10Str( char * out, uint32_t dat );
void http_recvcb(int conn, char *pusrdata, unsigned short length);
void http_disconnetcb(int conn);
int httpserver_connectcb( int socket ); // return which HTTP it is. -1 for failure
void DataStartPacket();
extern uint8_t * databuff_ptr;
void PushString( const char * data );
void PushByte( uint8_t c );
void PushBlob( const uint8_t * datam, int len );
int TCPCanSend( int socket, int size );
int TCPDoneSend( int socket );
int EndTCPWrite( int socket );
#define HTTP_CONNECTIONS 50
#ifndef MAX_HTTP_PATHLEN
#define MAX_HTTP_PATHLEN 80
#endif
#define HTTP_SERVER_TIMEOUT 500
#define HTTP_STATE_NONE 0
#define HTTP_STATE_WAIT_METHOD 1
#define HTTP_STATE_WAIT_PATH 2
#define HTTP_STATE_WAIT_PROTO 3
#define HTTP_STATE_WAIT_FLAG 4
#define HTTP_STATE_WAIT_INFLAG 5
#define HTTP_STATE_DATA_XFER 7
#define HTTP_STATE_DATA_WEBSOCKET 8
#define HTTP_WAIT_CLOSE 15
struct HTTPConnection
{
uint8_t state:4;
uint8_t state_deets;
//Provides path, i.e. "/index.html" but, for websockets, the last
//32 bytes of the buffer are used for the websockets key.
uint8_t pathbuffer[MAX_HTTP_PATHLEN];
uint8_t is_dynamic:1;
uint16_t timeout;
union data_t
{
struct MFSFileInfo filedescriptor;
struct UserData { uint16_t a, b, c; } user;
struct UserDataPtr { void * v; } userptr;
} data;
void * rcb;
void * rcbDat; //For websockets primarily.
void * ccb; //Close callback (used for websockets, primarily)
uint32_t bytesleft;
uint32_t bytessofar;
uint8_t is404:1;
uint8_t isdone:1;
uint8_t isfirst:1;
uint8_t keep_alive:1;
uint8_t need_resend:1;
uint8_t send_pending:1; //If we can send data, we should?
uint8_t is_gzip:1;
int socket;
uint8_t corked_data[4096];
int corked_data_place;
};
extern struct HTTPConnection HTTPConnections[HTTP_CONNECTIONS];
#endif
#ifndef _HTTP_BSD_H
#define _HTTP_BSD_H
//Call this to start your webserver.
int RunHTTP( int port );
int TickHTTP(); //returns -1 if problem.
//For running on a BSD Sockets System
int htsend( int socket, uint8_t * data, int datact );
void et_espconn_disconnect( int socket );
void http_recvcb(int whichhttp, char *pusrdata, unsigned short length);
void http_disconnetcb(int whichhttp);
int httpserver_connectcb( int socket ); // return which HTTP it is. -1 for failure
void DataStartPacket();
extern uint8_t * databuff_ptr;
void PushBlob( const uint8_t * data, int len );
void PushByte( uint8_t c );
void PushString( const char * data );
int TCPCanSend( int socket, int size );
int TCPDoneSend( int socket );
int EndTCPWrite( int socket );
void TermHTTPServer();
extern int cork_binary_rx;
#endif
//Copyright 2012-2016 <>< Charles Lohr Under the MIT/x11 License, NewBSD License or ColorChord License. You Choose.
#include <string.h>
#include <stdio.h>
struct HTTPConnection HTTPConnections[HTTP_CONNECTIONS];
#define HTDEBUG( x, ... ) printf( x, ##__VA_ARGS__ )
//#define HTDEBUG( x... )
//#define ISKEEPALIVE "keep-alive"
#define ISKEEPALIVE "close"
struct HTTPConnection HTTPConnections[HTTP_CONNECTIONS];
struct HTTPConnection * curhttp;
uint8_t * curdata;
uint16_t curlen;
uint8_t wsmask[4];
uint8_t wsmaskplace;
void CloseEvent();
void InternalStartHTTP( );
void HTTPHandleInternalCallback( );
void HTTPClose( )
{
//This is dead code, but it is a testament to Charles.
//Do not do this here. Wait for the ESP to tell us the
//socket is successfully closed.
//curhttp->state = HTTP_STATE_NONE;
curhttp->state = HTTP_WAIT_CLOSE;
et_espconn_disconnect( curhttp->socket );
CloseEvent();
}
void HTTPGotData( )
{
uint8_t c;
curhttp->timeout = 0;
while( curlen-- )
{
c = HTTPPOP;
// sendhex2( h->state ); sendchr( ' ' );
switch( curhttp->state )
{
case HTTP_STATE_WAIT_METHOD:
if( c == ' ' )
{
curhttp->state = HTTP_STATE_WAIT_PATH;
curhttp->state_deets = 0;
}
break;
case HTTP_STATE_WAIT_PATH:
curhttp->pathbuffer[curhttp->state_deets++] = c;
if( curhttp->state_deets == MAX_HTTP_PATHLEN )
{
curhttp->state_deets--;
}
if( c == ' ' )
{
//Tricky: If we're a websocket, we need the whole header.
curhttp->pathbuffer[curhttp->state_deets-1] = 0;
curhttp->state_deets = 0;
if( strncmp( (const char*)curhttp->pathbuffer, "/d/ws", 5 ) == 0 )
{
curhttp->state = HTTP_STATE_DATA_WEBSOCKET;
curhttp->state_deets = 0;
}
else
{
curhttp->state = HTTP_STATE_WAIT_PROTO;
}
}
break;
case HTTP_STATE_WAIT_PROTO:
if( c == '\n' )
{
curhttp->state = HTTP_STATE_WAIT_FLAG;
}
break;
case HTTP_STATE_WAIT_FLAG:
if( c == '\n' )
{
curhttp->state = HTTP_STATE_DATA_XFER;
InternalStartHTTP( );
}
else if( c != '\r' )
{
curhttp->state = HTTP_STATE_WAIT_INFLAG;
}
break;
case HTTP_STATE_WAIT_INFLAG:
if( c == '\n' )
{
curhttp->state = HTTP_STATE_WAIT_FLAG;
curhttp->state_deets = 0;
}
break;
case HTTP_STATE_DATA_XFER:
//Ignore any further data?
curlen = 0;
break;
case HTTP_STATE_DATA_WEBSOCKET:
WebSocketGotData( c );
break;
case HTTP_WAIT_CLOSE:
if( curhttp->keep_alive )
{
curhttp->state = HTTP_STATE_WAIT_METHOD;
}
else
{
HTTPClose( );
}
break;
default:
break;
};
}
}
static void DoHTTP( uint8_t timed )
{
switch( curhttp->state )
{
case HTTP_STATE_NONE: //do nothing if no state.
curhttp->send_pending = 0;
break;
case HTTP_STATE_DATA_XFER:
curhttp->send_pending = 1;
if( TCPCanSend( curhttp->socket, 1300 ) ) //TCPDoneSend
{
if( curhttp->is_dynamic )
{
HTTPCustomCallback( );
}
else
{
HTTPHandleInternalCallback( );
}
}
break;
case HTTP_WAIT_CLOSE:
curhttp->send_pending = 0;
if( TCPDoneSend( curhttp->socket ) )
{
if( curhttp->keep_alive )
{
curhttp->state = HTTP_STATE_WAIT_METHOD;
}
else
{
HTTPClose( );
}
}
break;
case HTTP_STATE_DATA_WEBSOCKET:
curhttp->send_pending = 0;
if( TCPCanSend( curhttp->socket, 1300 ) ) //TCPDoneSend
{
WebSocketTickInternal();
}
break;
default:
if( timed )
{
if( curhttp->timeout++ > HTTP_SERVER_TIMEOUT )
{
HTTPClose( );
}
}
}
}
void HTTPTick( uint8_t timed )
{
uint8_t i;
for( i = 0; i < HTTP_CONNECTIONS; i++ )
{
if( curhttp ) { HTDEBUG( "HTTPRXQ\n" ); break; }
curhttp = &HTTPConnections[i];
DoHTTP( timed );
curhttp = 0;
}
}
void HTTPHandleInternalCallback( )
{
uint16_t i, bytestoread;
if( curhttp->isdone )
{
HTTPClose( );
return;
}
if( curhttp->is404 )
{
DataStartPacket();
PushString("HTTP/1.1 404 Not Found\r\nConnection: close\r\n\r\nFile not found.");
EndTCPWrite( curhttp->socket );
curhttp->isdone = 1;
return;
}
if( curhttp->isfirst )
{
char stto[10];
uint8_t slen = strlen( curhttp->pathbuffer );
const char * k;
DataStartPacket();;
//TODO: Content Length? MIME-Type?
PushString("HTTP/1.1 200 Ok\r\n");
#ifdef CUSTOM_HTTPHEADER_CODE
CUSTOM_HTTPHEADER_CODE
#endif
if( curhttp->bytesleft < 0xfffffffe )
{
PushString("Connection: "ISKEEPALIVE"\r\nContent-Length: ");
Uint32To10Str( stto, curhttp->bytesleft );
PushBlob( stto, strlen( stto ) );
curhttp->keep_alive = 1;
}
else
{
PushString("Connection: close");
curhttp->keep_alive = 0;
}
PushString( "\r\nContent-Type: " );
//Content-Type?
while( slen && ( curhttp->pathbuffer[--slen] != '.' ) );
k = &curhttp->pathbuffer[slen+1];
if( strcmp( k, "mp3" ) == 0 ) PushString( "audio/mpeg3" );
else if( strcmp( k, "jpg" ) == 0 ) PushString( "image/jpeg" );
else if( strcmp( k, "png" ) == 0 ) PushString( "image/png" );
else if( strcmp( k, "css" ) == 0 ) PushString( "text/css" );
else if( strcmp( k, "js" ) == 0 ) PushString( "text/javascript" );
else if( strcmp( k, "gz" ) == 0 ) PushString( "text/plain\r\nContent-Encoding: gzip\r\nCache-Control: public, max-age=3600" );
else if( curhttp->bytesleft == 0xfffffffe ) PushString( "text/plain" );
else PushString( "text/html" );
if( curhttp->is_gzip ) PushString( "\r\nContent-Encoding: gzip" );
PushString( "\r\n\r\n" );
EndTCPWrite( curhttp->socket );
curhttp->isfirst = 0;
return;
}
DataStartPacket();
for( i = 0; i < 2 && curhttp->bytesleft; i++ )
{
int bpt = curhttp->bytesleft;
if( bpt > MFS_SECTOR ) bpt = MFS_SECTOR;
curhttp->bytesleft = MFSReadSector( databuff_ptr, &curhttp->data.filedescriptor );
databuff_ptr += bpt;
}
EndTCPWrite( curhttp->socket );
if( !curhttp->bytesleft )
curhttp->isdone = 1;
}
void InternalStartHTTP( )
{
int32_t clusterno;
int8_t i;
char * path = &curhttp->pathbuffer[0];
curhttp->is_gzip = 0;
if( curhttp->pathbuffer[0] == '/' )
path++;
if( path[0] == 'd' && path[1] == '/' )
{
curhttp->is_dynamic = 1;
curhttp->isfirst = 1;
curhttp->isdone = 0;
curhttp->is404 = 0;
HTTPCustomStart();
return;
}
if( !path[0] )
{
path = "index.html";
}
for( i = 0; path[i]; i++ )
if( path[i] == '?' ) path[i] = 0;
i = MFSOpenFile( path, &curhttp->data.filedescriptor );
curhttp->bytessofar = 0;
curhttp->is_gzip = 0;
if( i == MFS_FILE_COMPRESSED_MEMORY )
{
curhttp->is_gzip = 1;
}
else if( i < 0 )
{
HTDEBUG( "404(%s)\n", path );
curhttp->is404 = 1;
curhttp->isfirst = 1;
curhttp->isdone = 0;
curhttp->is_dynamic = 0;
curhttp->bytesleft = 0;
return;
}
curhttp->isfirst = 1;
curhttp->isdone = 0;
curhttp->is404 = 0;
curhttp->is_dynamic = 0;
curhttp->bytesleft = curhttp->data.filedescriptor.filelen;
}
void http_disconnetcb(int conn ) {
int r = conn;
if( r>=0 )
{
if( !HTTPConnections[r].is_dynamic ) MFSClose( &HTTPConnections[r].data.filedescriptor );
HTTPConnections[r].state = 0;
}
}
void http_recvcb(int conn, char *pusrdata, unsigned short length)
{
int whichhttp = conn;
//Though it might be possible for this to interrupt the other
//tick task, I don't know if this is actually a probelem.
//I'm adding this back-up-the-register just in case.
if( curhttp ) { HTDEBUG( "Unexpected Race Condition\n" ); return; }
curhttp = &HTTPConnections[whichhttp];
curdata = (uint8_t*)pusrdata;
curlen = length;
HTTPGotData();
curhttp = 0 ;
}
int httpserver_connectcb( int socket )
{
int i;
for( i = 0; i < HTTP_CONNECTIONS; i++ )
{
if( HTTPConnections[i].state == 0 )
{
HTTPConnections[i].socket = socket;
HTTPConnections[i].state = HTTP_STATE_WAIT_METHOD;
break;
}
}
if( i == HTTP_CONNECTIONS )
{
return -1;
}
return i;
}
int URLDecode( char * decodeinto, int maxlen, const char * buf )
{
int i = 0;
for( ; buf && *buf; buf++ )
{
char c = *buf;
if( c == '+' )
{
decodeinto[i++] = ' ';
}
else if( c == '?' || c == '&' )
{
break;
}
else if( c == '%' )
{
if( *(buf+1) && *(buf+2) )
{
decodeinto[i++] = hex2byte( buf+1 );
buf += 2;
}
}
else
{
decodeinto[i++] = c;
}
if( i >= maxlen -1 ) break;
}
decodeinto[i] = 0;
return i;
}
#ifndef RD_SHA1_HASH_LEN
#define RD_SHA1_HASH_LEN RD_SHA1_DIGEST_SIZE
#endif
void WebSocketGotData( uint8_t c )
{
switch( curhttp->state_deets )
{
case 0:
{
int i = 0;
char inkey[120];
unsigned char hash[RD_SHA1_HASH_LEN];
RD_SHA1_CTX c;
int inkeylen = 0;
curhttp->is_dynamic = 1;
while( curlen > 20 )
{
curdata++; curlen--;
if( strncmp( curdata, "Sec-WebSocket-Key: ", 19 ) == 0 )
{
break;
}
}
if( curlen <= 21 )
{
HTDEBUG( "No websocket key found.\n" );
curhttp->state = HTTP_WAIT_CLOSE;
return;
}
curdata+= 19;
curlen -= 19;
#define WS_KEY_LEN 36
#define WS_KEY "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
#define WS_RETKEY_SIZEM1 32
while( curlen > 1 )
{
uint8_t lc = *(curdata++);
inkey[i] = lc;
curlen--;
if( lc == '\r' )
{
inkey[i] = 0;
break;
}
i++;
if( i >= sizeof( inkey ) - WS_KEY_LEN - 5 )
{
HTDEBUG( "Websocket key too big.\n" );
curhttp->state = HTTP_WAIT_CLOSE;
return;
}
}
if( curlen <= 1 )
{
HTDEBUG( "Invalid websocket key found.\n" );
curhttp->state = HTTP_WAIT_CLOSE;
return;
}
if( i + WS_KEY_LEN + 1 >= sizeof( inkey ) )
{
HTDEBUG( "WSKEY Too Big.\n" );
curhttp->state = HTTP_WAIT_CLOSE;
return;
}
memcpy( &inkey[i], WS_KEY, WS_KEY_LEN + 1 );
i += WS_KEY_LEN;
RD_SHA1_Init( &c );
RD_SHA1_Update( &c, inkey, i );
RD_SHA1_Final( hash, &c );
#if (WS_RETKEY_SIZE > MAX_HTTP_PATHLEN - 10 )
#error MAX_HTTP_PATHLEN too short.
#endif
my_base64_encode( hash, RD_SHA1_HASH_LEN, curhttp->pathbuffer + (MAX_HTTP_PATHLEN-WS_RETKEY_SIZEM1) );
curhttp->bytessofar = 0;
curhttp->bytesleft = 0;
NewWebSocket();
//Respond...
curhttp->state_deets = 1;
break;
}
case 1:
if( c == '\n' ) curhttp->state_deets = 2;
break;
case 2:
if( c == '\r' ) curhttp->state_deets = 3;
else curhttp->state_deets = 1;
break;
case 3:
if( c == '\n' ) curhttp->state_deets = 4;
else curhttp->state_deets = 1;
break;
case 5: //Established connection.
{
//XXX TODO: Seems to malfunction on large-ish packets. I know it has problems with 140-byte payloads.
do
{
if( curlen < 5 ) //Can't interpret packet.
break;
uint8_t fin = c & 1;
uint8_t opcode = c << 4;
uint16_t payloadlen = *(curdata++);
curlen--;
if( !(payloadlen & 0x80) )
{
HTDEBUG( "Unmasked packet (%d)\n", payloadlen );
curhttp->state = HTTP_WAIT_CLOSE;
break;
}
if( opcode == 128 )
{
//Close connection.
//HTDEBUG( "CLOSE\n" );
//curhttp->state = HTTP_WAIT_CLOSE;
//break;
}
payloadlen &= 0x7f;
if( payloadlen == 127 )
{
//Very long payload.
//Not supported.
HTDEBUG( "Unsupported payload packet.\n" );
curhttp->state = HTTP_WAIT_CLOSE;
break;
}
else if( payloadlen == 126 )
{
payloadlen = (curdata[0] << 8) | curdata[1];
curdata += 2;
curlen -= 2;
}
wsmask[0] = curdata[0];
wsmask[1] = curdata[1];
wsmask[2] = curdata[2];
wsmask[3] = curdata[3];
curdata += 4;
curlen -= 4;
wsmaskplace = 0;
//XXX Warning: When packets get larger, they may split the
//websockets packets into multiple parts. We could handle this
//but at the cost of prescious RAM. I am chosing to just drop those
//packets on the floor, and restarting the connection.
if( curlen < payloadlen )
{
extern int cork_binary_rx;
cork_binary_rx = 1;
//HTDEBUG( "Websocket Fragmented. %d %d\n", curlen, payloadlen );
//curhttp->state = HTTP_WAIT_CLOSE;
HTDEBUG( "Websocket Fragmented. %d %d\n", curlen, payloadlen );
curhttp->state = HTTP_WAIT_CLOSE;
return;
}
char * newcurdata = curdata + payloadlen + 1;
WebSocketData( payloadlen );
curlen -= payloadlen;
curdata = newcurdata;
}
while( curlen > 5 );
break;
}
default:
break;
}
}
void WebSocketTickInternal()
{
switch( curhttp->state_deets )
{
case 4: //Has key full HTTP header, etc. wants response.
DataStartPacket();;
PushString( "HTTP/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Accept: " );
PushString( curhttp->pathbuffer + (MAX_HTTP_PATHLEN-WS_RETKEY_SIZEM1) );
PushString( "\r\n\r\n" );
EndTCPWrite( curhttp->socket );
curhttp->state_deets = 5;
curhttp->keep_alive = 0;
break;
case 5:
WebSocketTick();
break;
}
}
void WebSocketSend( uint8_t * data, int size )
{
DataStartPacket();;
PushByte( 0x82 ); //0x81 is text.
if( size >= 126 )
{
PushByte( 0x00 | 126 );
PushByte( size>>8 );
PushByte( size&0xff );
}
else
{
PushByte( 0x00 | size );
}
PushBlob( data, size );
EndTCPWrite( curhttp->socket );
curhttp->send_pending = 1;
}
uint8_t WSPOPMASK()
{
uint8_t mask = wsmask[wsmaskplace];
wsmaskplace = (wsmaskplace+1)&3;
return (*curdata++)^(mask);
}
#if defined(WINDOWS) || defined(WIN32) || defined(WIN64) || defined(_WIN32) || defined(_WIN64)
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <winsock2.h>
#define socklen_t uint32_t
#define SHUT_RDWR SD_BOTH
#define MSG_NOSIGNAL 0
#else
#define closesocket close
#include <sys/types.h>
#include <sys/socket.h>
#include <linux/in.h>
#include <unistd.h>
#include <sys/time.h>
uint16_t htons(uint16_t hostshort);
#endif
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
static int serverSocket;
uint8_t * databuff_ptr;
uint8_t databuff[1536];
int cork_binary_rx;
#ifndef HTTP_POLL_TIMEOUT
#define HTTP_POLL_TIMEOUT 0 //This is a little weird, it's an adaptation from cnhttp.
#endif
#define DESTROY_SOCKETS_LIST 200
int destroy_sockets[DESTROY_SOCKETS_LIST];
int destroy_socket_head = 0;
int sockets[HTTP_CONNECTIONS];
void et_espconn_disconnect( int socket )
{
shutdown( socket, SHUT_RDWR );
int i;
//printf( "Shut: %d\n", socket );
for( i = 0; i < HTTP_CONNECTIONS; i++ )
{
if( sockets[i] == socket )
{
http_disconnetcb( i );
sockets[i] = 0;
}
}
if( destroy_sockets[destroy_socket_head] ) closesocket( destroy_sockets[destroy_socket_head] );
destroy_sockets[destroy_socket_head] = socket;
destroy_socket_head = (destroy_socket_head+1)%DESTROY_SOCKETS_LIST;
}
void DataStartPacket()
{
databuff_ptr = databuff;
}
void PushByte( uint8_t c )
{
if( databuff_ptr - databuff + 1 >= sizeof( databuff ) ) return;
*(databuff_ptr++) = c;
}
void PushBlob( const uint8_t * data, int len )
{
if( databuff_ptr - databuff + len >= sizeof( databuff ) ) return;
memcpy( databuff_ptr, data, len );
databuff_ptr += len;
}
void PushString( const char * data )
{
int len = strlen( data );
if( databuff_ptr - databuff + len >= sizeof( databuff ) ) return;
memcpy( databuff_ptr, data, len );
databuff_ptr += len;
}
int TCPCanSend( int socket, int size )
{
fd_set write_fd_set;
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 0;
FD_ZERO (&write_fd_set);
FD_SET (socket, &write_fd_set);
int r = select (FD_SETSIZE, NULL, &write_fd_set, NULL, &tv);
if (r < 0)
{
perror ("select");
return -1;
}
return r;
}
int TCPCanRead( int sock )
{
fd_set read_fd_set;
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 0;
FD_ZERO (&read_fd_set);
FD_SET (sock, &read_fd_set);
int r;
r = select (FD_SETSIZE, &read_fd_set, NULL, NULL, &tv);
if (r < 0)
{
perror ("select");
return -1;
}
return r;
}
int TCPException( int sock )
{
int error_code;