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miniupnpc.c: UPNP_GetValidIGD() now checks for ExternalIpAddress

This commit is contained in:
Thomas Bernard 2013-12-09 09:29:08 +01:00
parent 3a87aa2f10
commit 6e20b2af61
2 changed files with 44 additions and 21 deletions
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3
miniupnpc/Changelog.txt
View File

@ -1,8 +1,9 @@
$Id: Changelog.txt,v 1.187 2013/06/06 21:36:39 nanard Exp $
$Id: Changelog.txt,v 1.189 2013/10/07 10:04:55 nanard Exp $
miniUPnP client Changelog.
2013/10/07:
fixed potential buffer overrun in miniwget.c
Modified UPNP_GetValidIGD() to check for ExternalIpAddress
2013/08/01:
define MAXHOSTNAMELEN if not already done

62
miniupnpc/miniupnpc.c
View File

@ -882,7 +882,7 @@ UPNPIGD_IsConnected(struct UPNPUrls * urls, struct IGDdatas * data)
* not connected
* 3 = an UPnP device has been found but was not recognized as an IGD
*
* In any non zero return case, the urls and data structures
* In any positive non zero return case, the urls and data structures
* passed as parameters are set. Donc forget to call FreeUPNPUrls(urls) to
* free allocated memory.
*/
@ -895,11 +895,14 @@ UPNP_GetValidIGD(struct UPNPDev * devlist,
struct xml_desc {
char * xml;
int size;
int is_igd;
} * desc = NULL;
struct UPNPDev * dev;
int ndev = 0;
int i;
int state = -1; /* state 1 : IGD connected. State 2 : IGD. State 3 : anything */
int n_igd = 0;
char extIpAddr[16];
if(!devlist)
{
#ifdef DEBUG
@ -907,6 +910,7 @@ UPNP_GetValidIGD(struct UPNPDev * devlist,
#endif
return 0;
}
/* counting total number of devices in the list */
for(dev = devlist; dev; dev = dev->pNext)
ndev++;
if(ndev > 0)
@ -915,41 +919,58 @@ UPNP_GetValidIGD(struct UPNPDev * devlist,
if(!desc)
return -1; /* memory allocation error */
}
/* Step 1 : downloading descriptions and testing type */
for(dev = devlist, i = 0; dev; dev = dev->pNext, i++)
{
/* we should choose an internet gateway device.
* with st == urn:schemas-upnp-org:device:InternetGatewayDevice:1 */
desc[i].xml = miniwget_getaddr(dev->descURL, &(desc[i].size),
lanaddr, lanaddrlen,
dev->scope_id);
#ifdef DEBUG
if(!desc[i].xml)
{
printf("error getting XML description %s\n", dev->descURL);
}
#endif
if(desc[i].xml)
{
memset(data, 0, sizeof(struct IGDdatas));
memset(urls, 0, sizeof(struct UPNPUrls));
parserootdesc(desc[i].xml, desc[i].size, data);
if(0==strcmp(data->CIF.servicetype,
"urn:schemas-upnp-org:service:WANCommonInterfaceConfig:1"))
{
desc[i].is_igd = 1;
n_igd++;
}
}
}
/* iterate the list to find a device depending on state */
for(state = 1; state <= 3; state++)
{
for(dev = devlist, i = 0; dev; dev = dev->pNext, i++)
{
/* we should choose an internet gateway device.
* with st == urn:schemas-upnp-org:device:InternetGatewayDevice:1 */
if(state == 1)
{
desc[i].xml = miniwget_getaddr(dev->descURL, &(desc[i].size),
lanaddr, lanaddrlen,
dev->scope_id);
#ifdef DEBUG
if(!desc[i].xml)
{
printf("error getting XML description %s\n", dev->descURL);
}
#endif
}
if(desc[i].xml)
{
memset(data, 0, sizeof(struct IGDdatas));
memset(urls, 0, sizeof(struct UPNPUrls));
parserootdesc(desc[i].xml, desc[i].size, data);
if(0==strcmp(data->CIF.servicetype,
"urn:schemas-upnp-org:service:WANCommonInterfaceConfig:1")
|| state >= 3 )
if(desc[i].is_igd || state >= 3 )
{
GetUPNPUrls(urls, data, dev->descURL, dev->scope_id);
/* in state 2 and 3 we dont test if device is connected ! */
if(state >= 2)
goto free_and_return;
#ifdef DEBUG
printf("UPNPIGD_IsConnected(%s) = %d\n",
urls->controlURL,
UPNPIGD_IsConnected(urls, data));
#endif
if((state >= 2) || UPNPIGD_IsConnected(urls, data))
/* checks that status is connected AND there is a external IP address assigned */
if(UPNPIGD_IsConnected(urls, data)
&& (UPNP_GetExternalIPAddress(urls->controlURL, data->first.servicetype, extIpAddr) == 0))
goto free_and_return;
FreeUPNPUrls(urls);
if(data->second.servicetype[0] != '\0') {
@ -967,7 +988,8 @@ UPNP_GetValidIGD(struct UPNPDev * devlist,
urls->controlURL,
UPNPIGD_IsConnected(urls, data));
#endif
if((state >= 2) || UPNPIGD_IsConnected(urls, data))
if(UPNPIGD_IsConnected(urls, data)
&& (UPNP_GetExternalIPAddress(urls->controlURL, data->first.servicetype, extIpAddr) == 0))
goto free_and_return;
FreeUPNPUrls(urls);
}