Hello,
I'm trying to use the NDK to process all incoming IP packets in a TMDSEVM6670LE, and for that I'm using the socket API as described in SPRU524i section 3.3.
My problem is that I cannot even receive UDP datagrams when using a SOCK_RAW socket. I have verified that *the code works* when SOCK_DGRAM is used instead. So, how should I configure the NDK to give me the packets?
The code is modified from mcsdk_2_01_02_06/examples/ndk/helloWorld/, I have replaced the UDP task there with this one:
ret = fdOpenSession(TaskSelf());
if (ret == 0) {
/* Error */
System_printf("Error opening fd session.\n");
return;
}
s = socket(AF_INET, SOCK_RAW, IPPROTO_UDP);
if (s == INVALID_SOCKET) {
System_printf("Error: socket creation returns %d\n",
fdError());
}
struct sockaddr_in sin;
struct in_addr sina = {
INADDR_ANY
};
memset(&sin, 0, sizeof(struct sockaddr_in));
sin.sin_family = AF_INET;
sin.sin_addr = sina;
sin.sin_port = htons(1025);
ret = bind(s, (PSA)&sin, sizeof(struct sockaddr_in));
if (ret == -1) {
System_printf("Error: socket bind returns %d\n",
fdError());
}
int val = 1;
ret = setsockopt(s, IPPROTO_IP, IP_HDRINCL, &val, sizeof(val));
if (ret == -1) {
System_printf("Error: socket setsockopt returns %d\n",
fdError());
}
UInt8 *buf;
HANDLE buf_hnd;
while (1) {
ret = recvnc(s, &buf, MSG_WAITALL, &buf_hnd);
recvncfree(buf_hnd);
}
fdCloseSession(TaskSelf());
Can this be done with SOCK_RAW? If not, AF_RAWETH with SOCK_RAWETH seemed the next logical choice, but section 3.5.2 says that I cannot use IP protocols there. I don't mind receiving the ethernet headers as well, all I care is that IP packets can be processed by my application.
