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authorRoland McGrath <roland@hack.frob.com>2013-08-27 10:33:15 -0700
committerRoland McGrath <roland@hack.frob.com>2013-08-27 10:33:15 -0700
commite041fb8b6557882b6710a655a97bbf3541b56b54 (patch)
treef1217ebf57d3bcd34541581406a84dbff09c43be /bits/socket.h
parent8cc3269f95fa7faa8f448d741f68cbc40efbf4ee (diff)
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Replace generic bits/socket.h with 4.4 file.
Diffstat (limited to 'bits/socket.h')
-rw-r--r--bits/socket.h138
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'. */