Tool/software: Linux
Hi:
I have a Linux application running in the A15 in a AM5708 custom board.
I am able to send and receive UDP frames when the I know the remote IP. The problem is that
I want to send a UDP frame to a IP multicast "224.0.1.1" but in this case the frame is not being sent out by the interface.
I only have one ethernet interface over GMAC.. An snippet of the code is:
// Open socket
proto = getprotobyname("udp");
SNTP.header.socket_udp = socket(PF_INET, SOCK_DGRAM | SOCK_NONBLOCK, proto->p_proto);
if(SNTP.header.socket_udp == -1)
{
PRINTF_0("(%u) ERROR creating UDP socket for SNTP anycast()\n", system_clock);
SNTP.run.status = SNTP_ANYCAST_STATE_ERROR;
return 0;
}
// Bind socket
memset(&client, 0x00, sizeof(struct sockaddr_in));
client.sin_family = AF_INET;
client.sin_addr.s_addr = INADDR_ANY;
client.sin_port = htons(SNTP_ANYCAST_LOCAL_PORT);
status = bind(SNTP.header.socket_udp, (struct sockaddr *)&(client), sizeof(struct sockaddr));
if(status == -1)
{
PRINTF_0("(%u) ERROR binding UDP socket for SNTP anycast()\n", system_clock);
close(SNTP.header.socket_udp);
SNTP.header.socket_udp = -1;
SNTP.run.status = SNTP_ANYCAST_STATE_ERROR;
return 0;
}
{
static struct sockaddr_in to;
static int len, to_len;
// Send the packet
memset(&to, 0x00, sizeof(struct sockaddr_in));
to_len = (unsigned char)(sizeof(struct sockaddr_in));
to.sin_family = AF_INET;
to.sin_addr.s_addr = (SNTP.run.server_address);
to.sin_port = htons(SNTP.run.server_port);
memcpy(SNTP.header.buffer_tx, &(SNTP_FullPacket_Out.Basic), sizeof(NtpBasicInfo));
len = sendto(SNTP.header.socket_udp,
"Hello world",
11,
0,
(struct sockaddr *)&to,
to_len);
if (len == -1)
{
PRINTF_0("(%u) ERROR sending SNTP packet in SNTP_tx()\n", system_clock);
perror("ANYCAST DIRECT"); // Billa
SNTP.run.status = SNTP_ANYCAST_STATE_ERROR;
return 0;
}
}
What am I doing wrong?
Regards
Billa
