unable to discover the linksys router wag54g thru SSDP fro..

Archived from groups: microsoft.public.windowsxp.general (More info?)

After the "upgrade" was the router reset? If yes,have you checked in
with Linksys tech support?

venkatu662000@yahoo.com wrote:

> I am unable to discover the linksys router wag54g thru SSDP from win2k;
> It is hanging for ever at: 'recvfrom (skt, buff, len, 0, (struct
> sockaddr *)&c, &slen);' in the code snippet shown below.
>
> Apparently, this seems to be happpening after I applied firmware
> upgrade to the linksys router. Before applying the upgrade it was
> detectable. The firmawre upgrade has made the router TR-069 complaint.
> However, by any chance, would it have also made non TR-064 complaint,
> thereby preventing devices with devicetype
> 'urnslforum-org:service:InternetGatewayDevice:1' from responding ?
> Any help here is greatly appreciated.
>
>
> #include "ssdp.h"
>
> void initializeWinSock () {
> WSADATA jnk;
>
> WSAStartup(WINSOCK_VERSION, &jnk);
> //Hopefully we are ready to start now.
>
> }
>
> void cleanWinSock() {
> WSACleanup();
> }
>
> int skt;
>
> char * geterrormsg() {
> LPVOID lpMsgBuf;
> static char buff[1024];
> int error = WSAGetLastError();
> if (error == WSAENOPROTOOPT) printf("Winsock doesnt support this
> option" );
> FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
> FORMAT_MESSAGE_FROM_SYSTEM |
> FORMAT_MESSAGE_IGNORE_INSERTS,
> NULL,
> error,
> 0,//MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
> (LPTSTR) &lpMsgBuf, 0,NULL );
>
>
> sprintf(buff,"%d-%s",error,lpMsgBuf);
>
>
> return (char *)buff;
>
>
> }
>
> int sendRequest() {
> int status;
> struct sockaddr_in a, b, c;
> unsigned char ttl = 1; //Only hop at the moment in LAN
> int slen = sizeof (c);
> char buff [4096];
> int len;
>
> memset (buff,0,4096);
> strcat(buff,"M-SEARCH * HTTP/1.1\r\n" );
> strcat(buff,"HOST: 239.255.255.250:1900\r\n" );
> strcat(buff,"MAN: \"ssdpiscover\"\r\n" );
> strcat(buff,"ST:
> urnslforum-org:service:InternetGatewayDevice:1\r\n" );
> strcat(buff,"MX: 10\r\n\r\n" );
>
> len = strlen(buff);
> skt = socket (AF_INET, SOCK_DGRAM, 0);
> if (skt == -1) {perror ("socket" );return -1;}
>
> a.sin_family = AF_INET;
> a.sin_port = htons(PORT);
> a.sin_addr.s_addr = htonl(INADDR_ANY);
> int one = 1;
> setsockopt(skt, SOL_SOCKET, SO_REUSEADDR, (char *)&one, sizeof(one));
> status = bind (skt,(const struct sockaddr*)&a,sizeof (a));
> if (status == -1 ) {closesocket(skt); perror("bind" ); return -1;}
>
> b.sin_family = AF_INET;
> b.sin_port = htons(PORT);
> b.sin_addr.s_addr = htonl(0xEFFFFFFA);
> status = setsockopt (skt,SOL_SOCKET,SO_BROADCAST,(char
> *)&one,sizeof(one));
> if (status == 0) {
> status = sendto (skt,buff, len, 0, (const struct sockaddr *)&b,
> sizeof(b));
> printf("Sending %s\n", buff);
> }
>
> struct ip_mreq mreq;
> mreq.imr_interface.s_addr = htonl(INADDR_ANY);
> mreq.imr_multiaddr.s_addr = htonl(0xEFFFFFFA);
>
> ttl = 1;
> status = setsockopt(skt,IPPROTO_IP,IP_MULTICAST_LOOP,(const char
> *)&ttl,sizeof(ttl));
> ttl =1;
> status = setsockopt(skt,IPPROTO_IP,IP_MULTICAST_TTL,(const char
> *)&ttl,sizeof(ttl));
> status = setsockopt(skt,IPPROTO_IP,IP_MULTICAST_IF,(const char
> *)&mreq.imr_interface.s_addr,sizeof(struct sockaddr_in));
> status = setsockopt(skt,IPPROTO_IP,IP_ADD_MEMBERSHIP,(const char
> *)&mreq,sizeof(mreq));
> if (status == -1) {printf("The error msg = %s" , geterrormsg());
> return -1;}
>
> len = 4096;
> while(1) {
> slen = sizeof (c);
> memset (buff,0,4096);
> recvfrom (skt, buff, len, 0, (struct sockaddr *)&c, &slen);
> printf("The received IP is %s\n",inet_ntoa(c.sin_addr));printf("The
> message is %s\r\n", buff);
> memset (buff,0,4096);
> }
>
> return 0;
> }
>
> int main() {
> initializeWinSock();
> sendRequest();
> cleanWinSock();
> return 0;
> }
>

Archived from groups: microsoft.public.windowsxp.general (More info?)

Providing the sample response I got from wag54g without the firmware
upgrade:

The received IP is 192.168.1.1
The message is NOTIFY * HTTP/1.1
HOST: 239.255.255.250:1900
CACHE-CONTROL: max-age=86400
LOCATION: http://192.168.1.1:51679/devicedesc.xml
NT: uuid:739f75f0-a90c-4e42-ac21-001217BC390E
NTS: ssdp:alive
SERVER: Linux/2.4.17_mvl21-malta-mips_fp_le UPnP/1.0 Server/1.0
USN: uuid:739f75f0-a90c-4e42-ac21-001217BC390E


The received IP is 192.168.1.1
The message is NOTIFY * HTTP/1.1
HOST: 239.255.255.250:1900
CACHE-CONTROL: max-age=86400
LOCATION: http://192.168.1.1:51679/devicedesc.xml
NT: urnslforum-org:service:WANDSLLinkConfig:1
NTS: ssdp:alive
SERVER: Linux/2.4.17_mvl21-malta-mips_fp_le UPnP/1.0 Server/1.0
USN:
uuid:739f75f0-a90c-4e42-ac21-001217BC390E::urnslforum-org:service:WANDSLLinkConfig:1


The received IP is 192.168.1.1
The message is NOTIFY * HTTP/1.1
HOST: 239.255.255.250:1900
CACHE-CONTROL: max-age=86400
LOCATION: http://192.168.1.1:51679/devicedesc.xml
NT: urnslforum-org:service:WANPPPConnection:1
NTS: ssdp:alive
SERVER: Linux/2.4.17_mvl21-malta-mips_fp_le UPnP/1.0 Server/1.0
USN:
uuid:739f75f0-a90c-4e42-ac21-001217BC390E::urnslforum-org:service:WANPPPConnection:1