/**
* Establish a connection with a server.
* \param server the server to connect to, in the form
* "protocol://servername:port" where the port specifier
* is optional and if the protocol is missing it is assumed
* to be "tcpip".
* \param default_port the port to connect to, if port not specified in the
* server URL string.
* \param mtu desired maximum transmission unit size (in bytes)
* \param broker either 1 or 0 to indicate if connection is brokered through
* the mothership
*/
CRConnection * crNetConnectToServer( const char *server, unsigned short default_port, int mtu, int broker
#if defined(VBOX_WITH_CRHGSMI) && defined(IN_GUEST)
, struct VBOXUHGSMI *pHgsmi
#endif
)
{
char hostname[4096], protocol[4096];
unsigned short port;
CRConnection *conn;
crDebug( "In crNetConnectToServer( \"%s\", port=%d, mtu=%d, broker=%d )",
server, default_port, mtu, broker );
CRASSERT( cr_net.initialized );
if (mtu < CR_MINIMUM_MTU)
{
crError( "You tried to connect to server \"%s\" with an mtu of %d, "
"but the minimum MTU is %d", server, mtu, CR_MINIMUM_MTU );
}
/* Tear the URL apart into relevant portions. */
if ( !crParseURL( server, protocol, hostname, &port, default_port ) ) {
crError( "Malformed URL: \"%s\"", server );
}
/* If the host name is "localhost" replace it with the _real_ name
* of the localhost. If we don't do this, there seems to be
* confusion in the mothership as to whether or not "localhost" and
* "foo.bar.com" are the same machine.
*/
if (crStrcmp(hostname, "localhost") == 0) {
int rv = crGetHostname(hostname, 4096);
CRASSERT(rv == 0);
(void) rv;
}
/* XXX why is this here??? I think it could be moved into the
* crTeacConnection() function with no problem. I.e. change the
* connection's port, teac_rank and tcscomm_rank there. (BrianP)
*/
if ( !crStrcmp( protocol, "quadrics" ) ||
!crStrcmp( protocol, "quadrics-tcscomm" ) ) {
/* For Quadrics protocols, treat "port" as "rank" */
if ( port > CR_QUADRICS_HIGHEST_RANK ) {
crWarning( "Invalid crserver rank, %d, defaulting to %d\n",
port, CR_QUADRICS_LOWEST_RANK );
port = CR_QUADRICS_LOWEST_RANK;
}
}
crDebug( "Connecting to %s on port %d, with protocol %s",
hostname, port, protocol );
#ifdef SDP_SUPPORT
/* This makes me ill, but we need to "fix" the hostname for sdp. MCH */
if (!crStrcmp(protocol, "sdp")) {
char* temp;
temp = strtok(hostname, ".");
crStrcat(temp, crGetSDPHostnameSuffix());
crStrcpy(hostname, temp);
crDebug("SDP rename hostname: %s", hostname);
}
#endif
conn = (CRConnection *) crCalloc( sizeof(*conn) );
if (!conn)
return NULL;
/* init the non-zero fields */
conn->type = CR_NO_CONNECTION; /* we don't know yet */
conn->recv_credits = CR_INITIAL_RECV_CREDITS;
conn->hostname = crStrdup( hostname );
conn->port = port;
conn->mtu = mtu;
conn->buffer_size = mtu;
conn->broker = broker;
conn->endianness = crDetermineEndianness();
/* XXX why are these here??? Move them into the crTeacConnection()
* and crTcscommConnection() functions.
*/
conn->teac_id = -1;
conn->teac_rank = port;
conn->tcscomm_id = -1;
conn->tcscomm_rank = port;
crInitMessageList(&conn->messageList);
/* now, just dispatch to the appropriate protocol's initialization functions. */
InitConnection(conn, protocol, mtu
#if defined(VBOX_WITH_CRHGSMI) && defined(IN_GUEST)
, pHgsmi
#endif
);
if (!crNetConnect( conn ))
{
crDebug("crNetConnectToServer() failed, freeing the connection");
#ifdef CHROMIUM_THREADSAFE
crFreeMutex( &conn->messageList.lock );
#endif
conn->Disconnect(conn);
crFree( conn );
return NULL;
}
crDebug( "Done connecting to %s (swapping=%d)", server, conn->swap );
return conn;
}
static void
crSDPAccept( CRConnection *conn, const char *hostname, unsigned short port )
{
int err;
socklen_t addr_length;
struct sockaddr_in servaddr;
struct sockaddr addr;
struct hostent *host;
struct in_addr sin_addr;
if (port != last_port)
{
/* with the new OOB stuff, we can have multiple ports being
* accepted on, so we need to redo the server socket every time.
*/
cr_sdp.server_sock = socket( AF_INET_SDP, SOCK_STREAM, 0 );
if ( cr_sdp.server_sock == -1 )
{
err = crSDPErrno( );
crError( "Couldn't create socket: %s", crSDPErrorString( err ) );
}
spankSocket( cr_sdp.server_sock );
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = INADDR_ANY;
servaddr.sin_port = htons( port );
if ( bind( cr_sdp.server_sock, (struct sockaddr *) &servaddr, sizeof(servaddr) ) )
{
err = crSDPErrno( );
crError( "Couldn't bind to socket (port=%d): %s", port, crSDPErrorString( err ) );
}
last_port = port;
if ( listen( cr_sdp.server_sock, 100 /* max pending connections */ ) )
{
err = crSDPErrno( );
crError( "Couldn't listen on socket: %s", crSDPErrorString( err ) );
}
}
if (conn->broker)
{
CRConnection *mother;
char response[8096];
char my_hostname[256];
char *temp;
mother = __copy_of_crMothershipConnect( );
if (!hostname)
{
if ( crGetHostname( my_hostname, sizeof( my_hostname ) ) )
{
crError( "Couldn't determine my own hostname in crSDPAccept!" );
}
}
else
crStrcpy(my_hostname, hostname);
/* Hack hostname, YUCK!!! */
temp = strtok(my_hostname, ".");
crStrcat(temp, crGetSDPHostnameSuffix());
(void) temp;
if (!__copy_of_crMothershipSendString( mother, response, "acceptrequest sdp %s %d %d", temp, conn->port, conn->endianness ) )
{
crError( "Mothership didn't like my accept request" );
}
__copy_of_crMothershipDisconnect( mother );
sscanf( response, "%u", &(conn->id) );
}
addr_length = sizeof( addr );
conn->sdp_socket = accept( cr_sdp.server_sock, (struct sockaddr *) &addr, &addr_length );
if (conn->sdp_socket == -1)
{
err = crSDPErrno( );
crError( "Couldn't accept client: %s", crSDPErrorString( err ) );
}
sin_addr = ((struct sockaddr_in *) &addr)->sin_addr;
host = gethostbyaddr( (char *) &sin_addr, sizeof( sin_addr), AF_INET_SDP );
if (host == NULL )
{
char *temp = inet_ntoa( sin_addr );
conn->hostname = crStrdup( temp );
}
else
{
char *temp;
conn->hostname = crStrdup( host->h_name );
temp = conn->hostname;
while (*temp && *temp != '.' )
temp++;
*temp = '\0';
}
#ifdef RECV_BAIL_OUT
err = sizeof(unsigned int);
if ( getsockopt( conn->sdp_socket, SOL_SOCKET, SO_RCVBUF,
(char *) &conn->krecv_buf_size, &err ) )
{
conn->krecv_buf_size = 0;
}
#endif
crDebug( "Accepted connection from \"%s\".", conn->hostname );
}
