Date: Mon, 10 Apr 2006 11:40:46 +0200 From: Stefan <stefan@sf-net.com> To: freebsd-net@freebsd.org Subject: raw ip paket sendto error Message-ID: <F8D644AB-76D0-49B6-A665-6B459A13F85D@sf-net.com>
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Hi,
I'm trying to port my little application to the FreeBSD-system and
encountered some difficults I can't solve. The program is running
fine on SunOS, OpenBSD, Mac OS X and Debian GNU/Linux so I thought it
should run fine on FreeBSD too. Maybe I forget something and you can
help me out?
The first problem I had was at the function getaddrinfo. If I don't
submit a hints struct I get an error like this:
"servname not supported for ai_socktype"
This is the source part where the error occured:
if((getaddrinfoError = getaddrinfo(src_addr, src_port, NULL, &src_ai))
!= 0) {
fprintf(stderr, "Error getaddrinfo (src address): %s\n",
gai_strerror(getaddrinfoError));
exit(EXIT_FAILURE);
}
When I changed it to use a hint like this:
struct addrinfo hints;
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = 0;
hints.ai_protocol = 0;
hints.ai_addrlen = 0;
hints.ai_canonname = NULL;
hints.ai_addr = NULL;
hints.ai_next = NULL;
The function runs fine like I expected. Why does this happen on
FreeBSD systems?
Another major problem I have is with the sendto function. I've
created a raw IP paket and tried to send it out and I get this error:
"Invalid argument"
Here is the source part for the sendto function.
sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
setsockopt(sockfd, IPPROTO_IP, IP_HDRINCL, (char *)&on, sizeof(on));
result = sendto(sockfd, packet, (sizeof(struct ip) + sizeof(struct
udphdr)
+ payload_len), 0, (struct sockaddr *)&sin4,
(socklen_t)sizeof(struct sockaddr));
I can't figure out where the problem could be. I even don't know what
the error means or where I should look for. Do you have any suggestions?
Best regards, Stefan
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