316 lines
8.2 KiB
C
316 lines
8.2 KiB
C
/*
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* This file Copyright (C) Mnemosyne LLC
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*
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* This file is licensed by the GPL version 2. Works owned by the
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* Transmission project are granted a special exemption to clause 2 (b)
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* so that the bulk of its code can remain under the MIT license.
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* This exemption does not extend to derived works not owned by
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* the Transmission project.
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*
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* $Id$
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*/
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#include <assert.h>
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#include <errno.h>
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#ifdef SYSTEM_MINIUPNP
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#include <miniupnpc/miniupnpc.h>
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#include <miniupnpc/upnpcommands.h>
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#else
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#include <miniupnp/miniupnpc.h>
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#include <miniupnp/upnpcommands.h>
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#endif
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#ifdef SYS_DARWIN
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#define HAVE_MINIUPNP_16 1
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#endif
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#include "transmission.h"
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#include "log.h"
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#include "port-forwarding.h"
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#include "session.h"
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#include "upnp.h"
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#include "utils.h"
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static const char *
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getKey (void) { return _("Port Forwarding (UPnP)"); }
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typedef enum
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{
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TR_UPNP_IDLE,
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TR_UPNP_ERR,
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TR_UPNP_DISCOVER,
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TR_UPNP_MAP,
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TR_UPNP_UNMAP
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}
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tr_upnp_state;
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struct tr_upnp
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{
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bool hasDiscovered;
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struct UPNPUrls urls;
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struct IGDdatas data;
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int port;
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char lanaddr[16];
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unsigned int isMapped;
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tr_upnp_state state;
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};
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/**
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***
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**/
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tr_upnp*
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tr_upnpInit (void)
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{
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tr_upnp * ret = tr_new0 (tr_upnp, 1);
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ret->state = TR_UPNP_DISCOVER;
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ret->port = -1;
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return ret;
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}
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void
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tr_upnpClose (tr_upnp * handle)
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{
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assert (!handle->isMapped);
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assert ((handle->state == TR_UPNP_IDLE)
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|| (handle->state == TR_UPNP_ERR)
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|| (handle->state == TR_UPNP_DISCOVER));
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if (handle->hasDiscovered)
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FreeUPNPUrls (&handle->urls);
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tr_free (handle);
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}
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/**
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*** Wrappers for miniupnpc functions
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**/
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static struct UPNPDev *
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tr_upnpDiscover (int msec)
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{
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struct UPNPDev * ret = NULL;
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#if defined (HAVE_MINIUPNP_16)
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int err = UPNPDISCOVER_SUCCESS;
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ret = upnpDiscover (msec, NULL, NULL, 0, 0, &err);
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if (err != UPNPDISCOVER_SUCCESS)
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#elif defined (HAVE_MINIUPNP_15)
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ret = upnpDiscover (msec, NULL, NULL, 0);
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if (ret == NULL)
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#endif
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tr_logAddNamedDbg (getKey (), "upnpDiscover failed (errno %d - %s)", errno, tr_strerror (errno));
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return ret;
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}
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static int
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tr_upnpGetSpecificPortMappingEntry (tr_upnp * handle, const char * proto)
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{
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int err;
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char intClient[16];
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char intPort[16];
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char portStr[16];
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*intClient = '\0';
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*intPort = '\0';
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tr_snprintf (portStr, sizeof (portStr), "%d", (int)handle->port);
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#if defined (HAVE_MINIUPNP_16)
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err = UPNP_GetSpecificPortMappingEntry (handle->urls.controlURL, handle->data.first.servicetype, portStr, proto, intClient, intPort, NULL, NULL, NULL);
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#elif defined (HAVE_MINIUPNP_15)
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err = UPNP_GetSpecificPortMappingEntry (handle->urls.controlURL, handle->data.first.servicetype, portStr, proto, intClient, intPort);
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#else
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err = UPNPCOMMAND_UNKNOWN_ERROR;
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#endif
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return err;
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}
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static int
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tr_upnpAddPortMapping (const tr_upnp * handle, const char * proto, tr_port port, const char * desc)
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{
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int err;
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const int old_errno = errno;
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char portStr[16];
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errno = 0;
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tr_snprintf (portStr, sizeof (portStr), "%d", (int)port);
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#if defined (HAVE_MINIUPNP_16)
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err = UPNP_AddPortMapping (handle->urls.controlURL, handle->data.first.servicetype, portStr, portStr, handle->lanaddr, desc, proto, NULL, NULL);
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#elif defined (HAVE_MINIUPNP_15)
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err = UPNP_AddPortMapping (handle->urls.controlURL, handle->data.first.servicetype, portStr, portStr, handle->lanaddr, desc, proto, NULL);
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#else
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err = UPNPCOMMAND_UNKNOWN_ERROR;
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#endif
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if (err)
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tr_logAddNamedDbg (getKey (), "%s Port forwarding failed with error %d (errno %d - %s)", proto, err, errno, tr_strerror (errno));
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errno = old_errno;
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return err;
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}
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static void
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tr_upnpDeletePortMapping (const tr_upnp * handle, const char * proto, tr_port port)
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{
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char portStr[16];
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tr_snprintf (portStr, sizeof (portStr), "%d", (int)port);
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UPNP_DeletePortMapping (handle->urls.controlURL,
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handle->data.first.servicetype,
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portStr, proto, NULL);
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}
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/**
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***
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**/
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enum
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{
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UPNP_IGD_NONE = 0,
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UPNP_IGD_VALID_CONNECTED = 1,
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UPNP_IGD_VALID_NOT_CONNECTED = 2,
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UPNP_IGD_INVALID = 3
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};
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int
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tr_upnpPulse (tr_upnp * handle,
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int port,
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int isEnabled,
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int doPortCheck)
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{
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int ret;
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if (isEnabled && (handle->state == TR_UPNP_DISCOVER))
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{
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struct UPNPDev * devlist;
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devlist = tr_upnpDiscover (2000);
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errno = 0;
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if (UPNP_GetValidIGD (devlist, &handle->urls, &handle->data,
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handle->lanaddr, sizeof (handle->lanaddr)) == UPNP_IGD_VALID_CONNECTED)
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{
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tr_logAddNamedInfo (getKey (), _(
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"Found Internet Gateway Device \"%s\""),
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handle->urls.controlURL);
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tr_logAddNamedInfo (getKey (), _(
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"Local Address is \"%s\""), handle->lanaddr);
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handle->state = TR_UPNP_IDLE;
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handle->hasDiscovered = 1;
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}
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else
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{
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handle->state = TR_UPNP_ERR;
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tr_logAddNamedDbg (
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getKey (), "UPNP_GetValidIGD failed (errno %d - %s)",
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errno,
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tr_strerror (errno));
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tr_logAddNamedDbg (
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getKey (),
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"If your router supports UPnP, please make sure UPnP is enabled!");
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}
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freeUPNPDevlist (devlist);
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}
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if (handle->state == TR_UPNP_IDLE)
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{
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if (handle->isMapped && (!isEnabled || (handle->port != port)))
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handle->state = TR_UPNP_UNMAP;
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}
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if (isEnabled && handle->isMapped && doPortCheck)
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{
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if ((tr_upnpGetSpecificPortMappingEntry (handle, "TCP") != UPNPCOMMAND_SUCCESS) ||
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(tr_upnpGetSpecificPortMappingEntry (handle, "UDP") != UPNPCOMMAND_SUCCESS))
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{
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tr_logAddNamedInfo (getKey (), _("Port %d isn't forwarded"), handle->port);
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handle->isMapped = false;
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}
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}
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if (handle->state == TR_UPNP_UNMAP)
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{
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tr_upnpDeletePortMapping (handle, "TCP", handle->port);
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tr_upnpDeletePortMapping (handle, "UDP", handle->port);
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tr_logAddNamedInfo (getKey (),
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_("Stopping port forwarding through \"%s\", service \"%s\""),
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handle->urls.controlURL, handle->data.first.servicetype);
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handle->isMapped = 0;
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handle->state = TR_UPNP_IDLE;
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handle->port = -1;
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}
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if (handle->state == TR_UPNP_IDLE)
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{
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if (isEnabled && !handle->isMapped)
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handle->state = TR_UPNP_MAP;
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}
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if (handle->state == TR_UPNP_MAP)
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{
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int err_tcp = -1;
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int err_udp = -1;
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errno = 0;
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if (!handle->urls.controlURL || !handle->data.first.servicetype)
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handle->isMapped = 0;
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else
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{
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char desc[64];
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tr_snprintf (desc, sizeof (desc), "%s at %d", TR_NAME, port);
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err_tcp = tr_upnpAddPortMapping (handle, "TCP", port, desc);
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err_udp = tr_upnpAddPortMapping (handle, "UDP", port, desc);
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handle->isMapped = !err_tcp | !err_udp;
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}
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tr_logAddNamedInfo (getKey (),
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_("Port forwarding through \"%s\", service \"%s\". (local address: %s:%d)"),
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handle->urls.controlURL, handle->data.first.servicetype,
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handle->lanaddr, port);
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if (handle->isMapped)
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{
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tr_logAddNamedInfo (getKey (), "%s", _("Port forwarding successful!"));
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handle->port = port;
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handle->state = TR_UPNP_IDLE;
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}
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else
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{
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tr_logAddNamedDbg (getKey (), "If your router supports UPnP, please make sure UPnP is enabled!");
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handle->port = -1;
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handle->state = TR_UPNP_ERR;
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}
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}
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switch (handle->state)
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{
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case TR_UPNP_DISCOVER:
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ret = TR_PORT_UNMAPPED; break;
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case TR_UPNP_MAP:
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ret = TR_PORT_MAPPING; break;
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case TR_UPNP_UNMAP:
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ret = TR_PORT_UNMAPPING; break;
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case TR_UPNP_IDLE:
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ret = handle->isMapped ? TR_PORT_MAPPED
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: TR_PORT_UNMAPPED; break;
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default:
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ret = TR_PORT_ERROR; break;
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}
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return ret;
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}
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