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_at_roundhay:/usr/obj/home/freebsd.org/sys/TOED<mailto:root_at_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 -- +-------------------------------+------------------------------------+ | Vennlig hilsen, | Best regards, | | Trond Endrestøl, | Trond Endrestøl, | | IT-ansvarlig, | System administrator, | | Fagskolen Innlandet, | Gjøvik Technical College, Norway, | | tlf. mob. 952 62 567, | Cellular...: +47 952 62 567, | | sentralbord 61 14 54 00. | Switchboard: +47 61 14 54 00. | +-------------------------------+------------------------------------+Received on Fri Jun 28 2013 - 04:47:51 UTC
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