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|
/* $OpenBSD: socket.h,v 1.98 2019/07/22 15:34:07 robert Exp $ */
/* $NetBSD: socket.h,v 1.14 1996/02/09 18:25:36 christos Exp $ */
/*
* Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)socket.h 8.4 (Berkeley) 2/21/94
*/
#ifndef _SYS_SOCKET_H_
#define _SYS_SOCKET_H_
/* get the definitions for struct iovec, size_t, ssize_t, and <sys/cdefs.h> */
#include <sys/uio.h>
#if __BSD_VISIBLE
#include <sys/types.h> /* for off_t, uid_t, and gid_t */
#endif
#ifndef _SOCKLEN_T_DEFINED_
#define _SOCKLEN_T_DEFINED_
typedef __socklen_t socklen_t; /* length type for network syscalls */
#endif
#ifndef _SA_FAMILY_T_DEFINED_
#define _SA_FAMILY_T_DEFINED_
typedef __sa_family_t sa_family_t; /* sockaddr address family type */
#endif
/*
* Definitions related to sockets: types, address families, options.
*/
/*
* Types
*/
#define SOCK_STREAM 1 /* stream socket */
#define SOCK_DGRAM 2 /* datagram socket */
#define SOCK_RAW 3 /* raw-protocol interface */
#define SOCK_RDM 4 /* reliably-delivered message */
#define SOCK_SEQPACKET 5 /* sequenced packet stream */
#ifdef _KERNEL
#define SOCK_TYPE_MASK 0x000F /* mask that covers the above */
#endif
/*
* Socket creation flags
*/
#if __BSD_VISIBLE
#define SOCK_CLOEXEC 0x8000 /* set FD_CLOEXEC */
#define SOCK_NONBLOCK 0x4000 /* set O_NONBLOCK */
#ifdef _KERNEL
#define SOCK_NONBLOCK_INHERIT 0x2000 /* inherit O_NONBLOCK from listener */
#endif
#define SOCK_DNS 0x1000 /* set SS_DNS */
#endif /* __BSD_VISIBLE */
/*
* Option flags per-socket.
*/
#define SO_DEBUG 0x0001 /* turn on debugging info recording */
#define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
#define SO_REUSEADDR 0x0004 /* allow local address reuse */
#define SO_KEEPALIVE 0x0008 /* keep connections alive */
#define SO_DONTROUTE 0x0010 /* just use interface addresses */
#define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
#define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
#define SO_LINGER 0x0080 /* linger on close if data present */
#define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
#define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
#define SO_TIMESTAMP 0x0800 /* timestamp received dgram traffic */
#define SO_BINDANY 0x1000 /* allow bind to any address */
#define SO_ZEROIZE 0x2000 /* zero out all mbufs sent over socket */
/*
* Additional options, not kept in so_options.
*/
#define SO_SNDBUF 0x1001 /* send buffer size */
#define SO_RCVBUF 0x1002 /* receive buffer size */
#define SO_SNDLOWAT 0x1003 /* send low-water mark */
#define SO_RCVLOWAT 0x1004 /* receive low-water mark */
#define SO_SNDTIMEO 0x1005 /* send timeout */
#define SO_RCVTIMEO 0x1006 /* receive timeout */
#define SO_ERROR 0x1007 /* get error status and clear */
#define SO_TYPE 0x1008 /* get socket type */
#define SO_NETPROC 0x1020 /* multiplex; network processing */
#define SO_RTABLE 0x1021 /* routing table to be used */
#define SO_PEERCRED 0x1022 /* get connect-time credentials */
#define SO_SPLICE 0x1023 /* splice data to other socket */
#define SO_DOMAIN 0x1024 /* get socket domain */
#define SO_PROTOCOL 0x1025 /* get socket protocol */
/*
* Structure used for manipulating linger option.
*/
struct linger {
int l_onoff; /* option on/off */
int l_linger; /* linger time */
};
#if __BSD_VISIBLE
#ifndef _TIMEVAL_DECLARED
#define _TIMEVAL_DECLARED
struct timeval {
time_t tv_sec; /* seconds */
suseconds_t tv_usec; /* and microseconds */
};
#endif
/*
* Structure used for manipulating splice option.
*/
struct splice {
int sp_fd; /* drain socket file descriptor */
off_t sp_max; /* if set, maximum bytes to splice */
struct timeval sp_idle; /* idle timeout */
};
/*
* Maximum number of alternate routing tables
*/
#define RT_TABLEID_MAX 255
#define RT_TABLEID_BITS 8
#define RT_TABLEID_MASK 0xff
#endif /* __BSD_VISIBLE */
/*
* Level number for (get/set)sockopt() to apply to socket itself.
*/
#define SOL_SOCKET 0xffff /* options for socket level */
/*
* Address families.
*/
#define AF_UNSPEC 0 /* unspecified */
#define AF_UNIX 1 /* local to host */
#define AF_LOCAL AF_UNIX /* draft POSIX compatibility */
#define AF_INET 2 /* internetwork: UDP, TCP, etc. */
#define AF_IMPLINK 3 /* arpanet imp addresses */
#define AF_PUP 4 /* pup protocols: e.g. BSP */
#define AF_CHAOS 5 /* mit CHAOS protocols */
#define AF_NS 6 /* XEROX NS protocols */
#define AF_ISO 7 /* ISO protocols */
#define AF_OSI AF_ISO
#define AF_ECMA 8 /* european computer manufacturers */
#define AF_DATAKIT 9 /* datakit protocols */
#define AF_CCITT 10 /* CCITT protocols, X.25 etc */
#define AF_SNA 11 /* IBM SNA */
#define AF_DECnet 12 /* DECnet */
#define AF_DLI 13 /* DEC Direct data link interface */
#define AF_LAT 14 /* LAT */
#define AF_HYLINK 15 /* NSC Hyperchannel */
#define AF_APPLETALK 16 /* Apple Talk */
#define AF_ROUTE 17 /* Internal Routing Protocol */
#define AF_LINK 18 /* Link layer interface */
#define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
#define AF_COIP 20 /* connection-oriented IP, aka ST II */
#define AF_CNT 21 /* Computer Network Technology */
#define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
#define AF_IPX 23 /* Novell Internet Protocol */
#define AF_INET6 24 /* IPv6 */
#define pseudo_AF_PIP 25 /* Help Identify PIP packets */
#define AF_ISDN 26 /* Integrated Services Digital Network*/
#define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
#define AF_NATM 27 /* native ATM access */
#define AF_ENCAP 28
#define AF_SIP 29 /* Simple Internet Protocol */
#define AF_KEY 30
#define pseudo_AF_HDRCMPLT 31 /* Used by BPF to not rewrite headers
in interface output routine */
#define AF_BLUETOOTH 32 /* Bluetooth */
#define AF_MPLS 33 /* MPLS */
#define pseudo_AF_PFLOW 34 /* pflow */
#define pseudo_AF_PIPEX 35 /* PIPEX */
#define AF_MAX 36
/*
* Structure used by kernel to store most
* addresses.
*/
struct sockaddr {
__uint8_t sa_len; /* total length */
sa_family_t sa_family; /* address family */
char sa_data[14]; /* actually longer; address value */
};
/*
* Sockaddr type which can hold any sockaddr type available
* in the system.
*
* Note: __ss_{len,family} is defined in RFC2553. During RFC2553 discussion
* the field name went back and forth between ss_len and __ss_len,
* and RFC2553 specifies it to be __ss_len. openbsd picked ss_len.
* For maximum portability, userland programmer would need to
* (1) make the code never touch ss_len portion (cast it into sockaddr and
* touch sa_len), or (2) add "-Dss_len=__ss_len" into CFLAGS to unify all
* occurrences (including header file) to __ss_len.
*/
struct sockaddr_storage {
__uint8_t ss_len; /* total length */
sa_family_t ss_family; /* address family */
unsigned char __ss_pad1[6]; /* align to quad */
__uint64_t __ss_pad2; /* force alignment for stupid compilers */
unsigned char __ss_pad3[240]; /* pad to a total of 256 bytes */
};
#ifdef _KERNEL
/*
* Structure used by kernel to pass protocol
* information in raw sockets.
*/
struct sockproto {
unsigned short sp_family; /* address family */
unsigned short sp_protocol; /* protocol */
};
#endif /* _KERNEL */
/*
* Protocol families, same as address families for now.
*/
#define PF_UNSPEC AF_UNSPEC
#define PF_LOCAL AF_LOCAL
#define PF_UNIX AF_UNIX
#define PF_INET AF_INET
#define PF_IMPLINK AF_IMPLINK
#define PF_PUP AF_PUP
#define PF_CHAOS AF_CHAOS
#define PF_NS AF_NS
#define PF_ISO AF_ISO
#define PF_OSI AF_ISO
#define PF_ECMA AF_ECMA
#define PF_DATAKIT AF_DATAKIT
#define PF_CCITT AF_CCITT
#define PF_SNA AF_SNA
#define PF_DECnet AF_DECnet
#define PF_DLI AF_DLI
#define PF_LAT AF_LAT
#define PF_HYLINK AF_HYLINK
#define PF_APPLETALK AF_APPLETALK
#define PF_ROUTE AF_ROUTE
#define PF_LINK AF_LINK
#define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
#define PF_COIP AF_COIP
#define PF_CNT AF_CNT
#define PF_IPX AF_IPX /* same format as AF_NS */
#define PF_INET6 AF_INET6
#define PF_RTIP pseudo_AF_RTIP /* same format as AF_INET */
#define PF_PIP pseudo_AF_PIP
#define PF_ISDN AF_ISDN
#define PF_NATM AF_NATM
#define PF_ENCAP AF_ENCAP
#define PF_SIP AF_SIP
#define PF_KEY AF_KEY
#define PF_BPF pseudo_AF_HDRCMPLT
#define PF_BLUETOOTH AF_BLUETOOTH
#define PF_MPLS AF_MPLS
#define PF_PFLOW pseudo_AF_PFLOW
#define PF_PIPEX pseudo_AF_PIPEX
#define PF_MAX AF_MAX
/*
* These are the valid values for the "how" field used by shutdown(2).
*/
#define SHUT_RD 0
#define SHUT_WR 1
#define SHUT_RDWR 2
#if __BSD_VISIBLE
#define SA_LEN(x) ((x)->sa_len)
/* Read using getsockopt() with SOL_SOCKET, SO_PEERCRED */
struct sockpeercred {
uid_t uid; /* effective user id */
gid_t gid; /* effective group id */
pid_t pid;
};
/*
* Definitions for network related sysctl, CTL_NET.
*
* Second level is protocol family.
* Third level is protocol number.
*
* Further levels are defined by the individual families below.
*/
#define NET_MAXID AF_MAX
#define CTL_NET_NAMES { \
{ 0, 0 }, \
{ "unix", CTLTYPE_NODE }, \
{ "inet", CTLTYPE_NODE }, \
{ "implink", CTLTYPE_NODE }, \
{ "pup", CTLTYPE_NODE }, \
{ "chaos", CTLTYPE_NODE }, \
{ "xerox_ns", CTLTYPE_NODE }, \
{ "iso", CTLTYPE_NODE }, \
{ "emca", CTLTYPE_NODE }, \
{ "datakit", CTLTYPE_NODE }, \
{ "ccitt", CTLTYPE_NODE }, \
{ "ibm_sna", CTLTYPE_NODE }, \
{ "decnet", CTLTYPE_NODE }, \
{ "dec_dli", CTLTYPE_NODE }, \
{ "lat", CTLTYPE_NODE }, \
{ "hylink", CTLTYPE_NODE }, \
{ "appletalk", CTLTYPE_NODE }, \
{ "route", CTLTYPE_NODE }, \
{ "link", CTLTYPE_NODE }, \
{ "xtp", CTLTYPE_NODE }, \
{ "coip", CTLTYPE_NODE }, \
{ "cnt", CTLTYPE_NODE }, \
{ "rtip", CTLTYPE_NODE }, \
{ "ipx", CTLTYPE_NODE }, \
{ "inet6", CTLTYPE_NODE }, \
{ "pip", CTLTYPE_NODE }, \
{ "isdn", CTLTYPE_NODE }, \
{ "natm", CTLTYPE_NODE }, \
{ "encap", CTLTYPE_NODE }, \
{ "sip", CTLTYPE_NODE }, \
{ "key", CTLTYPE_NODE }, \
{ "bpf", CTLTYPE_NODE }, \
{ "bluetooth", CTLTYPE_NODE }, \
{ "mpls", CTLTYPE_NODE }, \
{ "pflow", CTLTYPE_NODE }, \
{ "pipex", CTLTYPE_NODE }, \
}
/*
* PF_ROUTE - Routing table
*
* Four additional levels are defined:
* Fourth: address family, 0 is wildcard
* Fifth: type of info, defined below
* Sixth: flag(s) to mask with for NET_RT_FLAGS
* Seventh: routing table to use (facultative, defaults to 0)
* NET_RT_TABLE has the table id as sixth element.
*/
#define NET_RT_DUMP 1 /* dump; may limit to a.f. */
#define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
#define NET_RT_IFLIST 3 /* survey interface list */
#define NET_RT_STATS 4 /* routing table statistics */
#define NET_RT_TABLE 5
#define NET_RT_IFNAMES 6
#define NET_RT_MAXID 7
#define CTL_NET_RT_NAMES { \
{ 0, 0 }, \
{ "dump", CTLTYPE_STRUCT }, \
{ "flags", CTLTYPE_STRUCT }, \
{ "iflist", CTLTYPE_STRUCT }, \
{ "stats", CTLTYPE_STRUCT }, \
{ "table", CTLTYPE_STRUCT }, \
{ "ifnames", CTLTYPE_STRUCT }, \
}
/*
* PF_LINK - link layer or device tunables
*/
#define NET_LINK_IFRXQ 1 /* net.link.ifrxq */
#define NET_LINK_MAXID 2
#define CTL_NET_LINK_NAMES { \
{ 0, 0 }, \
{ "ifrxq", CTLTYPE_NODE }, \
}
#define NET_LINK_IFRXQ_PRESSURE_RETURN \
1 /* net.link.ifrxq.pressure_return */
#define NET_LINK_IFRXQ_PRESSURE_DROP \
2 /* net.link.ifrxq.pressure_drop */
#define NET_LINK_IFRXQ_MAXID 3
#define CTL_NET_LINK_IFRXQ_NAMES { \
{ 0, 0 }, \
{ "pressure_return", CTLTYPE_INT }, \
{ "pressure_drop", CTLTYPE_INT }, \
}
/*
* PF_KEY - Key Management
*/
#define NET_KEY_SADB_DUMP 1 /* return SADB */
#define NET_KEY_SPD_DUMP 2 /* return SPD */
#define NET_KEY_MAXID 3
#define CTL_NET_KEY_NAMES { \
{ 0, 0 }, \
{ "sadb_dump", CTLTYPE_STRUCT }, \
{ "spd_dump", CTLTYPE_STRUCT }, \
}
/*
* PF_BPF not really a family, but connected under CTL_NET
*/
#define NET_BPF_BUFSIZE 1 /* default buffer size */
#define NET_BPF_MAXBUFSIZE 2 /* maximum buffer size */
#define NET_BPF_MAXID 3
#define CTL_NET_BPF_NAMES { \
{ 0, 0 }, \
{ "bufsize", CTLTYPE_INT }, \
{ "maxbufsize", CTLTYPE_INT }, \
}
/*
* PF_PFLOW not really a family, but connected under CTL_NET
*/
#define NET_PFLOW_STATS 1 /* statistics */
#define NET_PFLOW_MAXID 2
#define CTL_NET_PFLOW_NAMES { \
{ 0, 0 }, \
{ "stats", CTLTYPE_STRUCT }, \
}
#endif /* __BSD_VISIBLE */
/*
* Maximum queue length specifiable by listen(2).
*/
#define SOMAXCONN 128
/*
* Message header for recvmsg and sendmsg calls.
* Used value-result for recvmsg, value only for sendmsg.
*/
struct msghdr {
void *msg_name; /* optional address */
socklen_t msg_namelen; /* size of address */
struct iovec *msg_iov; /* scatter/gather array */
unsigned int msg_iovlen; /* # elements in msg_iov */
void *msg_control; /* ancillary data, see below */
socklen_t msg_controllen; /* ancillary data buffer len */
int msg_flags; /* flags on received message */
};
#define MSG_OOB 0x1 /* process out-of-band data */
#define MSG_PEEK 0x2 /* peek at incoming message */
#define MSG_DONTROUTE 0x4 /* send without using routing tables */
#define MSG_EOR 0x8 /* data completes record */
#define MSG_TRUNC 0x10 /* data discarded before delivery */
#define MSG_CTRUNC 0x20 /* control data lost before delivery */
#define MSG_WAITALL 0x40 /* wait for full request or error */
#define MSG_DONTWAIT 0x80 /* this message should be nonblocking */
#define MSG_BCAST 0x100 /* this message rec'd as broadcast */
#define MSG_MCAST 0x200 /* this message rec'd as multicast */
#define MSG_NOSIGNAL 0x400 /* do not send SIGPIPE */
#define MSG_CMSG_CLOEXEC 0x800 /* set FD_CLOEXEC on received fds */
/*
* Header for ancillary data objects in msg_control buffer.
* Used for additional information with/about a datagram
* not expressible by flags. The format is a sequence
* of message elements headed by cmsghdr structures.
*/
struct cmsghdr {
socklen_t cmsg_len; /* data byte count, including hdr */
int cmsg_level; /* originating protocol */
int cmsg_type; /* protocol-specific type */
/* followed by u_char cmsg_data[]; */
};
/* given pointer to struct cmsghdr, return pointer to data */
#define CMSG_DATA(cmsg) \
((unsigned char *)(cmsg) + _ALIGN(sizeof(struct cmsghdr)))
/* given pointer to struct cmsghdr, return pointer to next cmsghdr */
#define CMSG_NXTHDR(mhdr, cmsg) \
(((char *)(cmsg) + _ALIGN((cmsg)->cmsg_len) + \
_ALIGN(sizeof(struct cmsghdr)) > \
((char *)(mhdr)->msg_control) + (mhdr)->msg_controllen) ? \
(struct cmsghdr *)NULL : \
(struct cmsghdr *)((char *)(cmsg) + _ALIGN((cmsg)->cmsg_len)))
/*
* RFC 2292 requires to check msg_controllen, in case that the kernel returns
* an empty list for some reasons.
*/
#define CMSG_FIRSTHDR(mhdr) \
((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
(struct cmsghdr *)(mhdr)->msg_control : \
(struct cmsghdr *)NULL)
/* Round len up to next alignment boundary */
#ifdef _KERNEL
#define CMSG_ALIGN(n) _ALIGN(n)
#endif
/* Length of the contents of a control message of length len */
#define CMSG_LEN(len) (_ALIGN(sizeof(struct cmsghdr)) + (len))
/* Length of the space taken up by a padded control message of length len */
#define CMSG_SPACE(len) (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(len))
/* "Socket"-level control message types: */
#define SCM_RIGHTS 0x01 /* access rights (array of int) */
#define SCM_TIMESTAMP 0x04 /* timestamp (struct timeval) */
#ifndef _KERNEL
__BEGIN_DECLS
int accept(int, struct sockaddr *, socklen_t *);
int bind(int, const struct sockaddr *, socklen_t);
int connect(int, const struct sockaddr *, socklen_t);
int getpeername(int, struct sockaddr *, socklen_t *);
int getsockname(int, struct sockaddr *, socklen_t *);
int getsockopt(int, int, int, void *, socklen_t *);
int listen(int, int);
ssize_t recv(int, void *, size_t, int);
ssize_t recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *);
ssize_t recvmsg(int, struct msghdr *, int);
ssize_t send(int, const void *, size_t, int);
ssize_t sendto(int, const void *,
size_t, int, const struct sockaddr *, socklen_t);
ssize_t sendmsg(int, const struct msghdr *, int);
int setsockopt(int, int, int, const void *, socklen_t);
int shutdown(int, int);
int sockatmark(int);
int socket(int, int, int);
int socketpair(int, int, int, int *);
#if __BSD_VISIBLE
int accept4(int, struct sockaddr *__restrict, socklen_t *__restrict, int);
#endif
#if __BSD_VISIBLE
int getpeereid(int, uid_t *, gid_t *);
int getrtable(void);
int setrtable(int);
#endif /* __BSD_VISIBLE */
__END_DECLS
#else
void pfctlinput(int, struct sockaddr *);
static inline struct sockaddr *
sstosa(struct sockaddr_storage *ss)
{
return ((struct sockaddr *)(ss));
}
#endif /* !_KERNEL */
#endif /* !_SYS_SOCKET_H_ */
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