icmp6 man page on SmartOS

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ICMP6(7P)							     ICMP6(7P)

       icmp6 - Internet Control Message Protocol for Internet Protocol Version

       #include <sys/socket.h>
       #include <netinet/in.h>
       #include <netinet/ip_icmp.h>
       #include <netinet/icmp6.h>

       s = socket(AF_INET6, SOCK_RAW, proto);

       t = t_open("/dev/icmp6", O_RDWR);

       The ICMP6 protocol is the error and control message protocol used  with
       Version	6 of the Internet Protocol. It is used by the kernel to handle
       and report errors in protocol processing. It  is	 also  used  for  IPv6
       neighbor	 and  router  discovery,  and  for  multicast group membership
       queries and reports.  It may also be accessed  by  programs  using  the
       socket  interface  or  the  Transport Level Interface (TLI) for network
       monitoring and diagnostic functions.  When used with the socket	inter‐
       face,  a "raw socket" type is used. The protocol number for ICMP6, used
       in the proto parameter to the socket call, can be obtained from getpro‐
       tobyname(3SOCKET).  ICMP6  file descriptors and sockets are connection‐
       less and are normally used with the t_sndudata  /  t_rcvudata  and  the
       sendto()	  /   recvfrom()  calls.  They	may  also  be  used  with  the
       sendmsg()/recvgmsg() calls when sending or receiving ancillary data.

       Outgoing packets automatically have  an	Internet  Protocol  Version  6
       (IPv6)  header and zero or more IPv6 extension headers prepended. These
       headers are  prepended  by  the	kernel.	 Unlike	 ICMP  for  IPv4,  the
       IP_HDRINCL  option  is  not  supported for ICMP6, so ICMP6 applications
       neither build their own outbound IPv6 headers, nor do they receive  the
       inbound	IPv6  headers  with  received data. IPv6 extension headers and
       relevant fields of the IPv6 header may be set or received as  ancillary
       data  to	 a  sendmsg(3SOCKET)  or recvmsg(3SOCKET) system call. Each of
       these fields and extension headers may also be  set  on	a  per	socket
       basis  with  the setsockopt(3SOCKET) system call. Such "sticky" options
       are used on all outgoing packets unless overridden by  ancillary	 data.
       When any ancillary data is present with a sendmsg(3SOCKET) system call,
       all sticky options are ignored for that system call,  but  subsequently
       remain configured.

       ICMP6  is  a  datagram protocol layered above IPv6. Received ICMP6 mes‐
       sages may be reflected back to users of higher-level protocols such  as
       TCP  or	UDP  as	 error	returns	 from  system  calls.  A  copy of each
       ICMP6error message received by the system is provided to	 every	holder
       of an open ICMP6 socket or TLI descriptor.

       getprotobyname(3SOCKET),	       recv(3SOCKET),	     recvmsg(3SOCKET),
       send(3SOCKET), sendmsg(3SOCKET), setsockopt(3SOCKET), t_rcvudata(3NSL),
       t_sndudata(3NSL), inet6(7P), ip6(7P), routing(7P)

       Conta,  A. and Deering, S., RFC 2463, Internet Control Message Protocol
       (ICMPv6) for the Internet Protocol Version 6 (IPv6) Specification,  The
       Internet Society, December 1998.

       A socket operation may fail with one of the following errors returned:

			An  attempt  was  made	to establish a connection on a
			socket which already has one, or when trying to send a
			datagram  with	the  destination address specified and
			the socket is already connected.

			An attempt was made to send a datagram, but no	desti‐
			nation	address	 is  specified, and the socket has not
			been connected.

			The system ran out of  memory  for  an	internal  data

			An  attempt was made to create a socket with a network
			address for which no network interface exists.

			The system was unable to allocate memory for an inter‐
			nal data structure.

			An attempt was made to set an IPv4 socket option on an
			IPv6 socket.

			An attempt was made to set  an	invalid	 or  malformed
			socket option.

			An  attempt  was made to bind or connect to an IPv4 or
			mapped address,	 or  to	 specify  an  IPv4  or	mapped
			address as the next hop.

				 Nov 10, 1999			     ICMP6(7P)

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