diff options
Diffstat (limited to 'bits/socket.h')
| -rw-r--r-- | bits/socket.h | 138 |
1 files changed, 123 insertions, 15 deletions
diff --git a/bits/socket.h b/bits/socket.h index 7564e2b..78c54a0 100644 --- a/bits/socket.h +++ b/bits/socket.h @@ -1,11 +1,11 @@ -/* System-specific socket constants and types. Generic/4.3 BSD version. +/* System-specific socket constants and types. 4.4 BSD version. Copyright (C) 1991-2013 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of @@ -13,22 +13,23 @@ Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ + License along with the GNU C Library; see the file COPYING.LIB. If + not, see <http://www.gnu.org/licenses/>. */ #ifndef __BITS_SOCKET_H #define __BITS_SOCKET_H 1 -#if !defined _SYS_SOCKET_H && !defined _NETINET_IN_H +#ifndef _SYS_SOCKET_H # error "Never include <bits/socket.h> directly; use <sys/socket.h> instead." #endif -#include <limits.h> -#include <bits/types.h> - #define __need_size_t +#define __need_NULL #include <stddef.h> +#include <limits.h> /* XXX Is this allowed? */ +#include <bits/types.h> + /* Type for length arguments in socket calls. */ #ifndef __socklen_t_defined typedef __socklen_t socklen_t; @@ -49,9 +50,25 @@ enum __socket_type #define SOCK_RAW SOCK_RAW SOCK_RDM = 4, /* Reliably-delivered messages. */ #define SOCK_RDM SOCK_RDM - SOCK_SEQPACKET = 5 /* Sequenced, reliable, connection-based, + SOCK_SEQPACKET = 5, /* Sequenced, reliable, connection-based, datagrams of fixed maximum length. */ #define SOCK_SEQPACKET SOCK_SEQPACKET + +#define SOCK_MAX (SOCK_SEQPACKET + 1) + /* Mask which covers at least up to SOCK_MASK-1. + The remaining bits are used as flags. */ +#define SOCK_TYPE_MASK 0xf + + /* Flags to be ORed into the type parameter of socket and socketpair and + used for the flags parameter of accept4. */ + + SOCK_CLOEXEC = 0x10000000, /* Atomically set close-on-exec flag for the + new descriptor(s). */ +#define SOCK_CLOEXEC SOCK_CLOEXEC + + SOCK_NONBLOCK = 0x20000000 /* Atomically mark descriptor(s) as + non-blocking. */ +#define SOCK_NONBLOCK SOCK_NONBLOCK }; /* Protocol families. */ @@ -120,6 +137,8 @@ enum __socket_type #define AF_INET6 PF_INET6 #define AF_MAX PF_MAX +/* Maximum queue length specifiable by listen. */ +#define SOMAXCONN 128 /* 5 on the origional 4.4 BSD. */ /* Get the definition of the macro to define the common sockaddr members. */ #include <bits/sockaddr.h> @@ -167,8 +186,10 @@ enum #define MSG_CTRUNC MSG_CTRUNC MSG_WAITALL = 0x40, /* Wait for full request or error. */ #define MSG_WAITALL MSG_WAITALL - MSG_DONTWAIT = 0x80 /* This message should be nonblocking. */ + MSG_DONTWAIT = 0x80, /* This message should be nonblocking. */ #define MSG_DONTWAIT MSG_DONTWAIT + MSG_NOSIGNAL = 0x0400 /* Do not generate SIGPIPE on EPIPE. */ +#define MSG_NOSIGNAL MSG_NOSIGNAL }; @@ -176,18 +197,105 @@ enum `sendmsg' and received by `recvmsg'. */ struct msghdr { - __ptr_t msg_name; /* Address to send to/receive from. */ + void *msg_name; /* Address to send to/receive from. */ socklen_t msg_namelen; /* Length of address data. */ struct iovec *msg_iov; /* Vector of data to send/receive into. */ int msg_iovlen; /* Number of elements in the vector. */ - __ptr_t msg_accrights; /* Access rights information. */ - socklen_t msg_accrightslen; /* Length of access rights information. */ + void *msg_control; /* Ancillary data (eg BSD filedesc passing). */ + socklen_t msg_controllen; /* Ancillary data buffer length. */ int msg_flags; /* Flags in received message. */ }; +/* Structure used for storage of ancillary data object information. */ +struct cmsghdr + { + socklen_t cmsg_len; /* Length of data in cmsg_data plus length + of cmsghdr structure. */ + int cmsg_level; /* Originating protocol. */ + int cmsg_type; /* Protocol specific type. */ +#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L + __extension__ unsigned char __cmsg_data __flexarr; /* Ancillary data. */ +#endif + }; + +/* Ancillary data object manipulation macros. */ +#if (!defined __STRICT_ANSI__ && __GNUC__ >= 2) || __STDC_VERSION__ >= 199901L +# define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data) +#else +# define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1)) +#endif + +#define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg) + +#define CMSG_FIRSTHDR(mhdr) \ + ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr) \ + ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) NULL) + +#define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) \ + & (size_t) ~(sizeof (size_t) - 1)) +#define CMSG_SPACE(len) (CMSG_ALIGN (len) \ + + CMSG_ALIGN (sizeof (struct cmsghdr))) +#define CMSG_LEN(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len)) + +extern struct cmsghdr *__cmsg_nxthdr (struct msghdr *__mhdr, + struct cmsghdr *__cmsg) __THROW; +#ifdef __USE_EXTERN_INLINES +# ifndef _EXTERN_INLINE +# define _EXTERN_INLINE __extern_inline +# endif +_EXTERN_INLINE struct cmsghdr * +__NTH (__cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg)) +{ + if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr)) + /* The kernel header does this so there may be a reason. */ + return NULL; + + __cmsg = (struct cmsghdr *) ((unsigned char *) __cmsg + + CMSG_ALIGN (__cmsg->cmsg_len)); + if ((unsigned char *) (__cmsg + 1) > ((unsigned char *) __mhdr->msg_control + + __mhdr->msg_controllen) + || ((unsigned char *) __cmsg + CMSG_ALIGN (__cmsg->cmsg_len) + > ((unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen))) + /* No more entries. */ + return NULL; + return __cmsg; +} +#endif /* Use `extern inline'. */ + +/* Socket level message types. */ +enum + { + SCM_RIGHTS = 0x01, /* Access rights (array of int). */ +#define SCM_RIGHTS SCM_RIGHTS + SCM_TIMESTAMP = 0x02, /* Timestamp (struct timeval). */ +#define SCM_TIMESTAMP SCM_TIMESTAMP + SCM_CREDS = 0x03 /* Process creds (struct cmsgcred). */ +#define SCM_CREDS SCM_CREDS + }; + +/* Unfortunately, BSD practice dictates this structure be of fixed size. + If there are more than CMGROUP_MAX groups, the list is truncated. + (On GNU systems, the `cmcred_euid' field is just the first in the + list of effective UIDs.) */ +#define CMGROUP_MAX 16 + +/* Structure delivered by SCM_CREDS. This describes the identity of the + sender of the data simultaneously received on the socket. By BSD + convention, this is included only when a sender on a AF_LOCAL socket + sends cmsg data of this type and size; the sender's structure is + ignored, and the system fills in the various IDs of the sender process. */ +struct cmsgcred + { + __pid_t cmcred_pid; + __uid_t cmcred_uid; + __uid_t cmcred_euid; + __gid_t cmcred_gid; + int cmcred_ngroups; + __gid_t cmcred_groups[CMGROUP_MAX]; + }; /* Protocol number used to manipulate socket-level options with `getsockopt' and `setsockopt'. */ |