--- Praveen C H <praveenc@sasken.com> schrieb: > Hi
> Thanks in advance for the help.
>
> I am trying to locate where the metric for a route
> is maintained. I
> could not find it in struct rtable and struct
> dstentry.
>
> Can anyone help?
>
> manojs
> -
> : send the line
> "unsubscribe linux-net" in
> the body of a message to majordomo@vger.kernel.org
Thanks in advance,
I'm trying to write a program to send datagram through
a RAW-SOCKET. I encounter following problem>
1. The sendto function returns "Invalid argument".
After my own investigation i thimk the invalid
argument is the socket. Why do i say that?
2. When i call recfrom in the program before calling
sendto on the same socket, i can send the packet
without error.
But When i call directly the sendto function on the
socket, it fails.
Why? I love to have your suggestion.
Here are the programs>
1. Without calling recvfrom
sprintf(snd_buffer,
"BLABLABLABLABLABLABLABLABLABLABLA...\n");
if (sendto(sockfd, (const void *)snd_buffer,
sizeof(snd_buffer), 0,
(struct sockaddr *)&dest_addr, from_len) < 0)
{
perror("sendto");
exit(-1);
}
2. Calling recvfrom before calling sendto>
#if 1
if ((recv_ret = recvfrom(sockfd, (void *)buffer,
sizeof(buffer),
0, (struct sockaddr *)&from,
&from_len)) >= 0) {
for (i = 0; i < recv_ret; i++) {
printf("%02x%s", (unsigned char)buffer[i],
i == recv_ret - 1 ? "\n" : " ");
}
printf("sin_family = %lu\n sin_port = %d\n
sin_addr.s_addr = %08x\n",
from.sin_family, ntohs(from.sin_port),
from.sin_addr.s_addr);
}
#endif
while ( 1 )
{
#if 1
sprintf(snd_buffer,
"BLABLABLABLABLABLABLABLABLABLABLA...\n");
if (sendto(sockfd, (const void *)snd_buffer,
sizeof(snd_buffer), 0,
(struct sockaddr *)&dest_addr, from_len) < 0)
{
perror("sendto");
exit(-1);
}
printf("I've send\n");
#endif
}
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