Packet* socket_removeFromInputBuffer(Socket* socket) {
MAGIC_ASSERT(socket);
/* see if we have any packets */
Packet* packet = g_queue_pop_head(socket->inputBuffer);
if(packet) {
/* just removed a packet */
guint length = packet_getPayloadLength(packet);
socket->inputBufferLength -= length;
/* check if we need to reduce the buffer size */
if(socket->inputBufferSizePending > 0) {
socket_setInputBufferSize(socket, socket->inputBufferSizePending);
}
/* update the tracker input buffer stats */
Tracker* tracker = host_getTracker(worker_getCurrentHost());
Descriptor* descriptor = (Descriptor *)socket;
tracker_updateSocketInputBuffer(tracker, descriptor->handle, socket->inputBufferLength, socket->inputBufferSize);
/* we are not readable if we are now empty */
if(socket->inputBufferLength <= 0) {
descriptor_adjustStatus((Descriptor*)socket, DS_READABLE, FALSE);
}
}
return packet;
}
gint system_setSockOpt(gint fd, gint level, gint optname, const gpointer optval,
socklen_t optlen) {
if(!optval) {
errno = EFAULT;
return -1;
}
Host* node = _system_switchInShadowContext();
Descriptor* descriptor = host_lookupDescriptor(node, fd);
gint result = 0;
/* TODO: implement socket options */
if(descriptor) {
if(level == SOL_SOCKET) {
DescriptorType t = descriptor_getType(descriptor);
switch (optname) {
case SO_SNDBUF: {
if(optlen < sizeof(gint)) {
warning("called setsockopt with SO_SNDBUF with optlen < %i", (gint)(sizeof(gint)));
errno = EINVAL;
result = -1;
} else if (t != DT_TCPSOCKET && t != DT_UDPSOCKET) {
warning("called setsockopt with SO_SNDBUF on non-socket");
errno = ENOPROTOOPT;
result = -1;
} else {
gint v = *((gint*) optval);
socket_setOutputBufferSize((Socket*)descriptor, (gsize)v*2);
}
break;
}
case SO_RCVBUF: {
if(optlen < sizeof(gint)) {
warning("called setsockopt with SO_RCVBUF with optlen < %i", (gint)(sizeof(gint)));
errno = EINVAL;
result = -1;
} else if (t != DT_TCPSOCKET && t != DT_UDPSOCKET) {
warning("called setsockopt with SO_RCVBUF on non-socket");
errno = ENOPROTOOPT;
result = -1;
} else {
gint v = *((gint*) optval);
socket_setInputBufferSize((Socket*)descriptor, (gsize)v*2);
}
break;
}
case SO_REUSEADDR: {
// TODO implement this!
// XXX Tor actually uses this option!!
debug("setsockopt SO_REUSEADDR not yet implemented");
break;
}
default: {
warning("setsockopt optname %i not implemented", optname);
errno = ENOSYS;
result = -1;
break;
}
}
} else {
warning("setsockopt level %i not implemented", level);
errno = ENOSYS;
result = -1;
}
} else {
errno = EBADF;
result = -1;
}
_system_switchOutShadowContext(node);
return result;
}