117 lines
3.7 KiB
C
117 lines
3.7 KiB
C
/*
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* Copyright (c) 2004, 2008
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* The President and Fellows of Harvard College.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _KERN_SOCKET_H_
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#define _KERN_SOCKET_H_
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/*
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* Socket-related definitions, for <sys/socket.h>.
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*/
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/*
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* Important
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*/
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/* Socket types that we (might) support. */
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#define SOCK_STREAM 1 /* stream */
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#define SOCK_DGRAM 2 /* packet */
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#define SOCK_RAW 3 /* raw packet */
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/* Address families that we (might) support. */
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#define AF_UNSPEC 0
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#define AF_UNIX 1
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#define AF_INET 2
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#define AF_INET6 3
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/* Protocol families. Pointless layer of indirection in the standard API. */
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#define PF_UNSPEC AF_UNSPEC
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#define PF_UNIX AF_UNIX
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#define PF_INET AF_INET
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#define PF_INET6 AF_INET6
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/*
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* Socket address structures. Socket addresses are polymorphic, and
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* the polymorphism is handled by casting pointers. It's fairly gross,
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* but way too deeply standardized to ever change.
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*
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* Each address family defines a sockaddr type (sockaddr_un,
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* sockaddr_in, etc.) struct sockaddr is the common prefix of all
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* these, and struct sockaddr_storage is defined to be large enough to
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* hold any of them.
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*
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* The complex padding in sockaddr_storage forces it to be aligned,
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* which wouldn't happen if it were just a char array.
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*/
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struct sockaddr {
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__u8 sa_len;
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__u8 sa_family;
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};
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#define _SS_SIZE 128
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struct sockaddr_storage {
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__u8 ss_len;
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__u8 ss_family;
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__u8 __ss_pad1;
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__u8 __ss_pad2;
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__u32 __ss_pad3;
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__u64 __ss_pad4;
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char __ss_pad5[_SS_SIZE - sizeof(__u64) - sizeof(__u32) - 4*sizeof(__u8)];
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};
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/*
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* Not very important.
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*/
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/*
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* msghdr structures for sendmsg() and recvmsg().
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*/
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struct msghdr {
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void *msg_name; /* really sockaddr; address, or null */
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socklen_t msg_namelen; /* size of msg_name object, or 0 */
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struct iovec *msg_iov; /* I/O buffers */
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int msg_iovlen; /* number of iovecs */
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void *msg_control; /* auxiliary data area, or null */
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socklen_t msg_controllen; /* size of msg_control area */
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int msg_flags; /* flags */
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};
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struct cmsghdr {
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socklen_t cmsg_len; /* length of control data, including header */
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int cmsg_level; /* protocol layer item originates from */
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int cmsg_type; /* protocol-specific message type */
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/* char cmsg_data[];*/ /* data follows the header */
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};
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#endif /* _KERN_SOCKET_H_ */
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