On Fri, 28 Jun 2013 04:05-0000, Sreenivasa Honnur wrote:
> I am writing a kernel socket program which binds to a IPv6 address, so bind
> always fails with 49. Below is the code snippet I am using, is something
> wrong here?
>
> roundhay# uname -a
> FreeBSD roundhay 9.1-RELEASE FreeBSD 9.1-RELEASE #2: Mon Apr 8 16:15:06 IST
> 2013
> root@roundhay:/usr/obj/home/freebsd.org/sys/TOED<mailto:root@roundhay:/usr/obj/home/freebsd.org/sys/TOED>
> amd64
>
> Ifconfig/ping6 output:
> ======================
> cxgbe1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>
> options=6c07bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWTSO,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
> ether 00:07:43:11:89:88
> inet6 2010::102 prefixlen 64
> inet6 fe80::207:43ff:fe11:8988%cxgbe1 prefixlen 64 scopeid 0xd
> inet6 fe80::1%cxgbe1 prefixlen 64 scopeid 0xd
> nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
> media: Ethernet 10Gbase-SR <full-duplex>
> status: active
>
> roundhay# ping6 2010::101
> PING6(56=40+8+8 bytes) 2010::102 --> 2010::101
> 16 bytes from 2010::101, icmp_seq=0 hlim=64 time=0.915 ms
> 16 bytes from 2010::101, icmp_seq=1 hlim=64 time=0.168 ms
> ^C
> --- 2010::101 ping6 statistics ---
> 2 packets transmitted, 2 packets received, 0.0% packet loss
> round-trip min/avg/max/std-dev = 0.168/0.541/0.915/0.374 ms
Warning: I haven't dabbled in programming FreeBSD kernel internals,
but I have done some socket programming some years ago.
You failed to present the line declaring sock. The prototype for
socreate is:
int
socreate(int dom, struct socket **aso, int type, int proto,
struct ucred *cred, struct thread *td);
The second argument expects a pointer to a pointer to a socket (a
struct socket). The memory for the socket will be allocated by
socreate() and a pointer returned through the formal argument aso.
I only hope you declared sock as:
struct socket *sock;
Next, it would probably be wise to clear saddr6 before assigning
values to its members, something along:
memset((void *)&saddr6, 0, sizeof(saddr6));
or even:
bzero((void *)&saddr6, sizeof(saddr6));
That's all I can think of atm. Maybe someone more knowledgeable on
FreeBSD internals can assist you further.
> Code:
>
> struct sockaddr_in6 saddr6;
> rv = socreate(AF_INET6, &sock, SOCK_STREAM, IPPROTO_TCP,
> td->td_ucred, td);
>
> if (rv != 0) {
> printf("sock create ipv6 %s failed %d.\n",
> tbuf, rv);
> return NULL;
> }
>
> saddr6.sin6_family = AF_INET6;
> rv = inet_pton(AF_INET6, "2010::102", &saddr6.sin6_addr); ==>
> returns 1, which indicates it's a valid IPV6 address
> printf("inet_pton retunred:%d\n", rv);
>
> saddr6.sin6_port = htons(3260);
> saddr6.sin6_len = sizeof(saddr6);
>
> rv = sobind(sock, (struct sockaddr *)&saddr6, td); ==> fails
> with return value of 49
--
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| Vennlig hilsen, | Best regards, |
| Trond Endrestøl, | Trond Endrestøl, |
| IT-ansvarlig, | System administrator, |
| Fagskolen Innlandet, | Gjøvik Technical College, Norway, |
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