transmission/third-party/miniupnp/miniwget.c

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2009-10-11 01:32:58 +00:00
/* $Id: miniwget.c,v 1.28 2009/10/10 19:15:35 nanard Exp $ */
/* Project : miniupnp
* Author : Thomas Bernard
* Copyright (c) 2005-2009 Thomas Bernard
* This software is subject to the conditions detailed in the
* LICENCE file provided in this distribution.
* */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "miniupnpc.h"
#ifdef WIN32
#include <winsock2.h>
#include <io.h>
#define MAXHOSTNAMELEN 64
#define MIN(x,y) (((x)<(y))?(x):(y))
#define snprintf _snprintf
#define herror
#define socklen_t int
#else
#include <unistd.h>
#include <sys/param.h>
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#include <sys/select.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
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#include <time.h>
#define closesocket close
#define MINIUPNPC_IGNORE_EINTR
#endif
#if defined(__sun) || defined(sun)
#define MIN(x,y) (((x)<(y))?(x):(y))
#endif
#include "miniupnpcstrings.h"
#include "miniwget.h"
/* miniwget2() :
* */
static void *
miniwget2(const char * url, const char * host,
unsigned short port, const char * path,
int * size, char * addr_str, int addr_str_len)
{
char buf[2048];
int s;
struct sockaddr_in dest;
struct hostent *hp;
int n;
int len;
int sent;
#ifdef MINIUPNPC_SET_SOCKET_TIMEOUT
struct timeval timeout;
#endif
*size = 0;
hp = gethostbyname(host);
if(hp==NULL)
{
herror(host);
return NULL;
}
/* memcpy((char *)&dest.sin_addr, hp->h_addr, hp->h_length); */
memcpy(&dest.sin_addr, hp->h_addr, sizeof(dest.sin_addr));
memset(dest.sin_zero, 0, sizeof(dest.sin_zero));
s = socket(PF_INET, SOCK_STREAM, 0);
if(s < 0)
{
perror("socket");
return NULL;
}
#ifdef MINIUPNPC_SET_SOCKET_TIMEOUT
/* setting a 3 seconds timeout for the connect() call */
timeout.tv_sec = 3;
timeout.tv_usec = 0;
if(setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(struct timeval)) < 0)
{
perror("setsockopt");
}
timeout.tv_sec = 3;
timeout.tv_usec = 0;
if(setsockopt(s, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(struct timeval)) < 0)
{
perror("setsockopt");
}
#endif
dest.sin_family = AF_INET;
dest.sin_port = htons(port);
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n = connect(s, (struct sockaddr *)&dest, sizeof(struct sockaddr_in));
#ifdef MINIUPNPC_IGNORE_EINTR
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while(n < 0 && errno == EINTR)
{
socklen_t len;
fd_set wset;
int err;
FD_ZERO(&wset);
FD_SET(s, &wset);
if((n = select(s + 1, NULL, &wset, NULL, NULL)) == -1 && errno == EINTR)
continue;
/*len = 0;*/
/*n = getpeername(s, NULL, &len);*/
len = sizeof(err);
if(getsockopt(s, SOL_SOCKET, SO_ERROR, &err, &len) < 0) {
perror("getsockopt");
closesocket(s);
return NULL;
}
if(err != 0) {
errno = err;
n = -1;
}
}
#endif
if(n<0)
{
perror("connect");
closesocket(s);
return NULL;
}
/* get address for caller ! */
if(addr_str)
{
struct sockaddr_in saddr;
socklen_t saddrlen;
saddrlen = sizeof(saddr);
if(getsockname(s, (struct sockaddr *)&saddr, &saddrlen) < 0)
{
perror("getsockname");
}
else
{
#ifndef WIN32
inet_ntop(AF_INET, &saddr.sin_addr, addr_str, addr_str_len);
#else
/* using INT WINAPI WSAAddressToStringA(LPSOCKADDR, DWORD, LPWSAPROTOCOL_INFOA, LPSTR, LPDWORD);
* But his function make a string with the port : nn.nn.nn.nn:port */
/* if(WSAAddressToStringA((SOCKADDR *)&saddr, sizeof(saddr),
NULL, addr_str, (DWORD *)&addr_str_len))
{
printf("WSAAddressToStringA() failed : %d\n", WSAGetLastError());
}*/
strncpy(addr_str, inet_ntoa(saddr.sin_addr), addr_str_len);
#endif
}
#ifdef DEBUG
printf("address miniwget : %s\n", addr_str);
#endif
}
len = snprintf(buf, sizeof(buf),
"GET %s HTTP/1.1\r\n"
"Host: %s:%d\r\n"
"Connection: Close\r\n"
"User-Agent: " OS_STRING ", UPnP/1.0, MiniUPnPc/" MINIUPNPC_VERSION_STRING "\r\n"
"\r\n",
path, host, port);
sent = 0;
/* sending the HTTP request */
while(sent < len)
{
n = send(s, buf+sent, len-sent, 0);
if(n < 0)
{
perror("send");
closesocket(s);
return NULL;
}
else
{
sent += n;
}
}
{
int headers=1;
char * respbuffer = NULL;
int allreadyread = 0;
/*while((n = recv(s, buf, 2048, 0)) > 0)*/
while((n = ReceiveData(s, buf, 2048, 5000)) > 0)
{
if(headers)
{
int i=0;
while(i<n-3)
{
/* searching for the end of the HTTP headers */
if(buf[i]=='\r' && buf[i+1]=='\n'
&& buf[i+2]=='\r' && buf[i+3]=='\n')
{
headers = 0; /* end */
if(i<n-4)
{
/* Copy the content into respbuffet */
respbuffer = (char *)realloc((void *)respbuffer,
allreadyread+(n-i-4));
memcpy(respbuffer+allreadyread, buf + i + 4, n-i-4);
allreadyread += (n-i-4);
}
break;
}
i++;
}
}
else
{
respbuffer = (char *)realloc((void *)respbuffer,
allreadyread+n);
memcpy(respbuffer+allreadyread, buf, n);
allreadyread += n;
}
}
*size = allreadyread;
#ifdef DEBUG
printf("%d bytes read\n", *size);
#endif
closesocket(s);
return respbuffer;
}
}
/* parseURL()
* arguments :
* url : source string not modified
* hostname : hostname destination string (size of MAXHOSTNAMELEN+1)
* port : port (destination)
* path : pointer to the path part of the URL
*
* Return values :
* 0 - Failure
* 1 - Success */
int parseURL(const char * url, char * hostname, unsigned short * port, char * * path)
{
char * p1, *p2, *p3;
p1 = strstr(url, "://");
if(!p1)
return 0;
p1 += 3;
if( (url[0]!='h') || (url[1]!='t')
||(url[2]!='t') || (url[3]!='p'))
return 0;
p2 = strchr(p1, ':');
p3 = strchr(p1, '/');
if(!p3)
return 0;
memset(hostname, 0, MAXHOSTNAMELEN + 1);
if(!p2 || (p2>p3))
{
strncpy(hostname, p1, MIN(MAXHOSTNAMELEN, (int)(p3-p1)));
*port = 80;
}
else
{
strncpy(hostname, p1, MIN(MAXHOSTNAMELEN, (int)(p2-p1)));
*port = 0;
p2++;
while( (*p2 >= '0') && (*p2 <= '9'))
{
*port *= 10;
*port += (unsigned short)(*p2 - '0');
p2++;
}
}
*path = p3;
return 1;
}
void * miniwget(const char * url, int * size)
{
unsigned short port;
char * path;
/* protocol://host:port/chemin */
char hostname[MAXHOSTNAMELEN+1];
*size = 0;
if(!parseURL(url, hostname, &port, &path))
return NULL;
return miniwget2(url, hostname, port, path, size, 0, 0);
}
void * miniwget_getaddr(const char * url, int * size, char * addr, int addrlen)
{
unsigned short port;
char * path;
/* protocol://host:port/chemin */
char hostname[MAXHOSTNAMELEN+1];
*size = 0;
if(addr)
addr[0] = '\0';
if(!parseURL(url, hostname, &port, &path))
return NULL;
return miniwget2(url, hostname, port, path, size, addr, addrlen);
}