string SockWrapperPlain::Read()
{
static char buf[1024];
string sbuf;
ssize_t r;
if (!sock_ok)
return "";
if ((r = read(recv_fd, buf, sizeof buf - 1)) <= 0)
{
if (r == 0)
throw SockError("Connection reset by peer...");
else if(!sockerr_again())
throw SockError(string("Read error: ") + strerror(errno));
else
sbuf = "";
}
else
{
buf[r] = 0;
sbuf = buf;
}
return sbuf;
}
/* This one is actually pretty simple... Might get more calls if we can't write
the whole request at once. */
static gboolean http_connected( gpointer data, int source, b_input_condition cond )
{
struct http_request *req = data;
int st;
if( source < 0 )
goto error;
if( req->inpa > 0 )
b_event_remove( req->inpa );
sock_make_nonblocking( req->fd );
if( req->ssl )
{
st = ssl_write( req->ssl, req->request + req->bytes_written,
req->request_length - req->bytes_written );
if( st < 0 )
{
if( ssl_errno != SSL_AGAIN )
{
ssl_disconnect( req->ssl );
goto error;
}
}
}
else
{
st = write( source, req->request + req->bytes_written,
req->request_length - req->bytes_written );
if( st < 0 )
{
if( !sockerr_again() )
{
closesocket( req->fd );
goto error;
}
}
}
if( st > 0 )
req->bytes_written += st;
if( req->bytes_written < req->request_length )
req->inpa = b_input_add( source,
req->ssl ? ssl_getdirection( req->ssl ) : B_EV_IO_WRITE,
http_connected, req );
else
req->inpa = b_input_add( source, B_EV_IO_READ, http_incoming_data, req );
return FALSE;
error:
if( req->status_string == NULL )
req->status_string = g_strdup( "Error while writing HTTP request" );
req->func( req );
http_free( req );
return FALSE;
}
gboolean
Skype_loop (gpointer data, gint fd, b_input_condition condition)
{
im_connection* connection = data;
SkypeData* skype = connection->proto_data;
char buffer[IRC_LINE_SIZE];
if (ssl_read(skype->ssl, buffer, sizeof(buffer)) <= 0 && !sockerr_again()) {
closesocket(skype->fd);
skype->fd = -1;
imcb_error(connection, "Error while reading from server");
imc_logout(connection, TRUE);
return FALSE;
}
return TRUE;
}
static int proxy_connect_none(const char *host, unsigned short port, struct PHB *phb)
{
struct sockaddr_in *sin;
struct sockaddr_in me;
int fd = -1;
if (!(sin = gaim_gethostbyname(host, port))) {
g_free(phb);
return -1;
}
if ((fd = socket(sin->sin_family, SOCK_STREAM, 0)) < 0) {
g_free(phb);
return -1;
}
sock_make_nonblocking(fd);
if( global.conf->iface_out )
{
me.sin_family = AF_INET;
me.sin_port = 0;
me.sin_addr.s_addr = inet_addr( global.conf->iface_out );
if( bind( fd, (struct sockaddr *) &me, sizeof( me ) ) != 0 )
event_debug( "bind( %d, \"%s\" ) failure\n", fd, global.conf->iface_out );
}
event_debug("proxy_connect_none( \"%s\", %d ) = %d\n", host, port, fd);
if (connect(fd, (struct sockaddr *)sin, sizeof(*sin)) < 0 && !sockerr_again()) {
closesocket(fd);
g_free(phb);
return -1;
} else {
phb->inpa = b_input_add(fd, GAIM_INPUT_WRITE, gaim_io_connected, phb);
phb->fd = fd;
return fd;
}
}
void SockWrapperPlain::Write(string s)
{
ssize_t r;
if (!sock_ok)
return;
if ((r = write(send_fd, s.c_str(), s.size())) <= 0)
{
if (r == 0)
{
sock_ok = false;
throw SockError("Connection reset by peer...");
}
else if(!sockerr_again())
{
sock_ok = false;
throw SockError(string("Read error: ") + strerror(errno));
}
}
}
/* Return just one line. Returns NULL if something broke, an empty string
on temporary "errors" (EAGAIN and friends). */
static char *ipc_readline( int fd, int *recv_fd )
{
struct msghdr msg;
struct iovec iov;
char ccmsg[CMSG_SPACE(sizeof(recv_fd))];
struct cmsghdr *cmsg;
char buf[513], *eol;
int size;
/* Because this is internal communication, it should be pretty safe
to just peek at the message, find its length (by searching for the
end-of-line) and then just read that message. With internal
sockets and limites message length, messages should always be
complete. Saves us quite a lot of code and buffering. */
size = recv( fd, buf, sizeof( buf ) - 1, MSG_PEEK );
if( size == 0 || ( size < 0 && !sockerr_again() ) )
return NULL;
else if( size < 0 ) /* && sockerr_again() */
return( g_strdup( "" ) );
else
buf[size] = 0;
if( ( eol = strstr( buf, "\r\n" ) ) == NULL )
return NULL;
else
size = eol - buf + 2;
iov.iov_base = buf;
iov.iov_len = size;
memset( &msg, 0, sizeof( msg ) );
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
#ifndef NO_FD_PASSING
msg.msg_control = ccmsg;
msg.msg_controllen = sizeof( ccmsg );
#endif
if( recvmsg( fd, &msg, 0 ) != size )
return NULL;
#ifndef NO_FD_PASSING
if( recv_fd )
for( cmsg = CMSG_FIRSTHDR( &msg ); cmsg; cmsg = CMSG_NXTHDR( &msg, cmsg ) )
if( cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS )
{
/* Getting more than one shouldn't happen but if it does,
make sure we don't leave them around. */
if( *recv_fd != -1 )
close( *recv_fd );
*recv_fd = *(int*) CMSG_DATA( cmsg );
/*
fprintf( stderr, "pid %d received fd %d\n", (int) getpid(), *recv_fd );
*/
}
#endif
/*
fprintf( stderr, "pid %d received: %s", (int) getpid(), buf );
*/
return g_strndup( buf, size - 2 );
}
static gboolean http_incoming_data( gpointer data, int source, b_input_condition cond )
{
struct http_request *req = data;
int evil_server = 0;
char buffer[2048];
char *end1, *end2;
int st;
if( req->inpa > 0 )
b_event_remove( req->inpa );
if( req->ssl )
{
st = ssl_read( req->ssl, buffer, sizeof( buffer ) );
if( st < 0 )
{
if( ssl_errno != SSL_AGAIN )
{
/* goto cleanup; */
/* YAY! We have to deal with crappy Microsoft
servers that LOVE to send invalid TLS
packets that abort connections! \o/ */
goto got_reply;
}
}
else if( st == 0 )
{
goto got_reply;
}
}
else
{
st = read( req->fd, buffer, sizeof( buffer ) );
if( st < 0 )
{
if( !sockerr_again() )
{
req->status_string = g_strdup( strerror( errno ) );
goto cleanup;
}
}
else if( st == 0 )
{
goto got_reply;
}
}
if( st > 0 )
{
req->reply_headers = g_realloc( req->reply_headers, req->bytes_read + st + 1 );
memcpy( req->reply_headers + req->bytes_read, buffer, st );
req->bytes_read += st;
}
/* There will be more! */
req->inpa = b_input_add( req->fd,
req->ssl ? ssl_getdirection( req->ssl ) : B_EV_IO_READ,
http_incoming_data, req );
if( ssl_pending( req->ssl ) )
return http_incoming_data( data, source, cond );
else
return FALSE;
got_reply:
/* Maybe if the webserver is overloaded, or when there's bad SSL
support... */
if( req->bytes_read == 0 )
{
req->status_string = g_strdup( "Empty HTTP reply" );
goto cleanup;
}
/* Zero termination is very convenient. */
req->reply_headers[req->bytes_read] = 0;
/* Find the separation between headers and body, and keep stupid
webservers in mind. */
end1 = strstr( req->reply_headers, "\r\n\r\n" );
end2 = strstr( req->reply_headers, "\n\n" );
if( end2 && end2 < end1 )
{
end1 = end2 + 1;
evil_server = 1;
}
else if( end1 )
{
end1 += 2;
}
else
{
req->status_string = g_strdup( "Malformed HTTP reply" );
goto cleanup;
}
*end1 = 0;
if( getenv( "BITLBEE_DEBUG" ) )
printf( "HTTP response headers:\n%s\n", req->reply_headers );
if( evil_server )
req->reply_body = end1 + 1;
else
req->reply_body = end1 + 2;
req->body_size = req->reply_headers + req->bytes_read - req->reply_body;
if( ( end1 = strchr( req->reply_headers, ' ' ) ) != NULL )
{
if( sscanf( end1 + 1, "%d", &req->status_code ) != 1 )
{
req->status_string = g_strdup( "Can't parse status code" );
req->status_code = -1;
}
else
{
char *eol;
if( evil_server )
eol = strchr( end1, '\n' );
else
eol = strchr( end1, '\r' );
req->status_string = g_strndup( end1 + 1, eol - end1 - 1 );
/* Just to be sure... */
if( ( eol = strchr( req->status_string, '\r' ) ) )
*eol = 0;
if( ( eol = strchr( req->status_string, '\n' ) ) )
*eol = 0;
}
}
else
{
req->status_string = g_strdup( "Can't locate status code" );
req->status_code = -1;
}
if( ( ( req->status_code >= 301 && req->status_code <= 303 ) ||
req->status_code == 307 ) && req->redir_ttl-- > 0 )
{
char *loc, *new_request, *new_host;
int error = 0, new_port, new_proto;
/* We might fill it again, so let's not leak any memory. */
g_free( req->status_string );
req->status_string = NULL;
loc = strstr( req->reply_headers, "\nLocation: " );
if( loc == NULL ) /* We can't handle this redirect... */
{
req->status_string = g_strdup( "Can't locate Location: header" );
goto cleanup;
}
loc += 11;
while( *loc == ' ' )
loc ++;
/* TODO/FIXME: Possibly have to handle relative redirections,
and rewrite Host: headers. Not necessary for now, it's
enough for passport authentication like this. */
if( *loc == '/' )
{
/* Just a different pathname... */
/* Since we don't cache the servername, and since we
don't need this yet anyway, I won't implement it. */
req->status_string = g_strdup( "Can't handle recursive redirects" );
goto cleanup;
}
else
{
/* A whole URL */
url_t *url;
char *s;
const char *new_method;
s = strstr( loc, "\r\n" );
if( s == NULL )
goto cleanup;
url = g_new0( url_t, 1 );
*s = 0;
if( !url_set( url, loc ) )
{
req->status_string = g_strdup( "Malformed redirect URL" );
g_free( url );
goto cleanup;
}
/* Find all headers and, if necessary, the POST request contents.
Skip the old Host: header though. This crappy code here means
anything using this http_client MUST put the Host: header at
the top. */
if( !( ( s = strstr( req->request, "\r\nHost: " ) ) &&
( s = strstr( s + strlen( "\r\nHost: " ), "\r\n" ) ) ) )
{
req->status_string = g_strdup( "Error while rebuilding request string" );
g_free( url );
goto cleanup;
}
/* More or less HTTP/1.0 compliant, from my reading of RFC 2616.
Always perform a GET request unless we received a 301. 303 was
meant for this but it's HTTP/1.1-only and we're specifically
speaking HTTP/1.0. ...
Well except someone at identi.ca's didn't bother reading any
RFCs and just return HTTP/1.1-specific status codes to HTTP/1.0
requests. Fuckers. So here we are, handle 301..303,307. */
if( strncmp( req->request, "GET", 3 ) == 0 )
/* GETs never become POSTs. */
new_method = "GET";
else if( req->status_code == 302 || req->status_code == 303 )
/* 302 de-facto becomes GET, 303 as specified by RFC 2616#10.3.3 */
new_method = "GET";
else
/* 301 de-facto should stay POST, 307 specifally RFC 2616#10.3.8 */
new_method = "POST";
/* Okay, this isn't fun! We have to rebuild the request... :-( */
new_request = g_strdup_printf( "%s %s HTTP/1.0\r\nHost: %s%s",
new_method, url->file, url->host, s );
new_host = g_strdup( url->host );
new_port = url->port;
new_proto = url->proto;
/* If we went from POST to GET, truncate the request content. */
if( new_request[0] != req->request[0] && new_request[0] == 'G' &&
( s = strstr( new_request, "\r\n\r\n" ) ) )
s[4] = '\0';
g_free( url );
}
if( req->ssl )
ssl_disconnect( req->ssl );
else
closesocket( req->fd );
req->fd = -1;
req->ssl = NULL;
if( getenv( "BITLBEE_DEBUG" ) )
printf( "New headers for redirected HTTP request:\n%s\n", new_request );
if( new_proto == PROTO_HTTPS )
{
req->ssl = ssl_connect( new_host, new_port, TRUE, http_ssl_connected, req );
if( req->ssl == NULL )
error = 1;
}
else
{
req->fd = proxy_connect( new_host, new_port, http_connected, req );
if( req->fd < 0 )
error = 1;
}
g_free( new_host );
if( error )
{
req->status_string = g_strdup( "Connection problem during redirect" );
g_free( new_request );
goto cleanup;
}
g_free( req->request );
g_free( req->reply_headers );
req->request = new_request;
req->request_length = strlen( new_request );
req->bytes_read = req->bytes_written = req->inpa = 0;
req->reply_headers = req->reply_body = NULL;
return FALSE;
}
/* Assume that a closed connection means we're finished, this indeed
breaks with keep-alive connections and faulty connections. */
req->finished = 1;
cleanup:
if( req->ssl )
ssl_disconnect( req->ssl );
else
closesocket( req->fd );
if( getenv( "BITLBEE_DEBUG" ) && req )
printf( "Finishing HTTP request with status: %s\n",
req->status_string ? req->status_string : "NULL" );
req->func( req );
http_free( req );
return FALSE;
}
static int proxy_connect_none(const char *host, unsigned short port_, struct PHB *phb)
{
struct sockaddr_in me;
int fd = -1;
if (phb->gai_cur == NULL)
{
int ret;
char port[6];
struct addrinfo hints;
g_snprintf(port, sizeof(port), "%d", port_);
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_ADDRCONFIG | AI_NUMERICSERV;
if (!(ret = getaddrinfo(host, port, &hints, &phb->gai)))
phb->gai_cur = phb->gai;
else
event_debug("gai(): %s\n", gai_strerror(ret));
}
for (; phb->gai_cur; phb->gai_cur = phb->gai_cur->ai_next)
{
if ((fd = socket(phb->gai_cur->ai_family, phb->gai_cur->ai_socktype, phb->gai_cur->ai_protocol)) < 0) {
event_debug( "socket failed: %d\n", errno);
continue;
}
sock_make_nonblocking(fd);
if (global.conf->iface_out)
{
me.sin_family = AF_INET;
me.sin_port = 0;
me.sin_addr.s_addr = inet_addr( global.conf->iface_out );
if (bind(fd, (struct sockaddr *) &me, sizeof(me)) != 0)
event_debug("bind( %d, \"%s\" ) failure\n", fd, global.conf->iface_out);
}
event_debug("proxy_connect_none( \"%s\", %d ) = %d\n", host, port_, fd);
if (connect(fd, phb->gai_cur->ai_addr, phb->gai_cur->ai_addrlen) < 0 && !sockerr_again()) {
event_debug( "connect failed: %s\n", strerror(errno));
closesocket(fd);
fd = -1;
continue;
} else {
phb->inpa = b_input_add(fd, B_EV_IO_WRITE, gaim_io_connected, phb);
phb->fd = fd;
break;
}
}
if(fd < 0 && host)
g_free(phb);
return fd;
}
static gboolean http_incoming_data( gpointer data, int source, b_input_condition cond )
{
struct http_request *req = data;
char buffer[4096];
int st;
if( req->inpa > 0 )
{
b_event_remove( req->inpa );
req->inpa = 0;
}
if( req->ssl )
{
st = ssl_read( req->ssl, buffer, sizeof( buffer ) );
if( st < 0 )
{
if( ssl_errno != SSL_AGAIN )
{
/* goto cleanup; */
/* YAY! We have to deal with crappy Microsoft
servers that LOVE to send invalid TLS
packets that abort connections! \o/ */
goto eof;
}
}
else if( st == 0 )
{
goto eof;
}
}
else
{
st = read( req->fd, buffer, sizeof( buffer ) );
if( st < 0 )
{
if( !sockerr_again() )
{
req->status_string = g_strdup( strerror( errno ) );
goto cleanup;
}
}
else if( st == 0 )
{
goto eof;
}
}
if( st > 0 )
{
http_ret_t c;
if( req->flags & HTTPC_CHUNKED )
c = http_process_chunked_data( req, buffer, st );
else
c = http_process_data( req, buffer, st );
if( c == CR_EOF )
goto eof;
else if( c == CR_ERROR || c == CR_ABORT )
return FALSE;
}
if( req->content_length != -1 &&
req->body_size >= req->content_length )
goto eof;
if( ssl_pending( req->ssl ) )
return http_incoming_data( data, source, cond );
/* There will be more! */
req->inpa = b_input_add( req->fd,
req->ssl ? ssl_getdirection( req->ssl ) : B_EV_IO_READ,
http_incoming_data, req );
return FALSE;
eof:
req->flags |= HTTPC_EOF;
/* Maybe if the webserver is overloaded, or when there's bad SSL
support... */
if( req->bytes_read == 0 )
{
req->status_string = g_strdup( "Empty HTTP reply" );
goto cleanup;
}
cleanup:
/* Avoid g_source_remove warnings */
req->inpa = 0;
if( req->ssl )
ssl_disconnect( req->ssl );
else
closesocket( req->fd );
if( req->body_size < req->content_length )
{
req->status_code = -1;
g_free( req->status_string );
req->status_string = g_strdup( "Response truncated" );
}
if( getenv( "BITLBEE_DEBUG" ) && req )
printf( "Finishing HTTP request with status: %s\n",
req->status_string ? req->status_string : "NULL" );
req->func( req );
http_free( req );
return FALSE;
}
