871 lines
32 KiB
C
871 lines
32 KiB
C
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/*-
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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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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* 4. 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 REGENTS 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 REGENTS 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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*/
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/* __Userspace__ version of <sys/socketvar.h> goes here.*/
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#ifndef _USER_SOCKETVAR_H_
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#define _USER_SOCKETVAR_H_
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#if defined(__Userspace_os_Darwin)
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#include <sys/types.h>
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#include <unistd.h>
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#endif
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/* #include <sys/selinfo.h> */ /*__Userspace__ alternative?*/ /* for struct selinfo */
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/* #include <sys/_lock.h> was 0 byte file */
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/* #include <sys/_mutex.h> was 0 byte file */
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/* #include <sys/_sx.h> */ /*__Userspace__ alternative?*/
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#if !defined(__Userspace_os_DragonFly) && !defined(__Userspace_os_FreeBSD) && !defined(__Userspace_os_NetBSD) && !defined(__Userspace_os_Windows) && !defined(__Userspace_os_NaCl)
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#include <sys/uio.h>
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#endif
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#define SOCK_MAXADDRLEN 255
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#if !defined(MSG_NOTIFICATION)
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#define MSG_NOTIFICATION 0x2000 /* SCTP notification */
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#endif
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#define SCTP_SO_LINGER 0x0001
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#define SCTP_SO_ACCEPTCONN 0x0002
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#define SS_CANTRCVMORE 0x020
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#define SS_CANTSENDMORE 0x010
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#if defined(__Userspace_os_Darwin) || defined(__Userspace_os_DragonFly) || defined(__Userspace_os_FreeBSD) || defined(__Userspace_os_OpenBSD) || defined (__Userspace_os_Windows) || defined(__Userspace_os_NaCl)
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#define UIO_MAXIOV 1024
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#define ERESTART (-1)
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#endif
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#if !defined(__Userspace_os_Darwin) && !defined(__Userspace_os_NetBSD) && !defined(__Userspace_os_OpenBSD)
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enum uio_rw { UIO_READ, UIO_WRITE };
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#endif
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#if !defined(__Userspace_os_NetBSD) && !defined(__Userspace_os_OpenBSD)
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/* Segment flag values. */
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enum uio_seg {
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UIO_USERSPACE, /* from user data space */
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UIO_SYSSPACE /* from system space */
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};
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#endif
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struct proc {
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int stub; /* struct proc is a dummy for __Userspace__ */
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};
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MALLOC_DECLARE(M_ACCF);
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MALLOC_DECLARE(M_PCB);
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MALLOC_DECLARE(M_SONAME);
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/* __Userspace__ Are these all the fields we need?
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* Removing struct thread *uio_td; owner field
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*/
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struct uio {
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struct iovec *uio_iov; /* scatter/gather list */
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int uio_iovcnt; /* length of scatter/gather list */
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off_t uio_offset; /* offset in target object */
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ssize_t uio_resid; /* remaining bytes to process */
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enum uio_seg uio_segflg; /* address space */
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enum uio_rw uio_rw; /* operation */
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};
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/* __Userspace__ */
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/*
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* Kernel structure per socket.
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* Contains send and receive buffer queues,
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* handle on protocol and pointer to protocol
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* private data and error information.
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*/
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#if defined (__Userspace_os_Windows)
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#define AF_ROUTE 17
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#if !defined(__MINGW32__)
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typedef __int32 pid_t;
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#endif
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typedef unsigned __int32 uid_t;
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enum sigType {
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SIGNAL = 0,
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BROADCAST = 1,
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MAX_EVENTS = 2
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};
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#endif
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/*-
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* Locking key to struct socket:
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* (a) constant after allocation, no locking required.
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* (b) locked by SOCK_LOCK(so).
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* (c) locked by SOCKBUF_LOCK(&so->so_rcv).
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* (d) locked by SOCKBUF_LOCK(&so->so_snd).
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* (e) locked by ACCEPT_LOCK().
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* (f) not locked since integer reads/writes are atomic.
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* (g) used only as a sleep/wakeup address, no value.
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* (h) locked by global mutex so_global_mtx.
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*/
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struct socket {
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int so_count; /* (b) reference count */
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short so_type; /* (a) generic type, see socket.h */
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short so_options; /* from socket call, see socket.h */
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short so_linger; /* time to linger while closing */
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short so_state; /* (b) internal state flags SS_* */
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int so_qstate; /* (e) internal state flags SQ_* */
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void *so_pcb; /* protocol control block */
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int so_dom;
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/*
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* Variables for connection queuing.
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* Socket where accepts occur is so_head in all subsidiary sockets.
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* If so_head is 0, socket is not related to an accept.
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* For head socket so_incomp queues partially completed connections,
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* while so_comp is a queue of connections ready to be accepted.
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* If a connection is aborted and it has so_head set, then
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* it has to be pulled out of either so_incomp or so_comp.
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* We allow connections to queue up based on current queue lengths
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* and limit on number of queued connections for this socket.
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*/
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struct socket *so_head; /* (e) back pointer to listen socket */
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TAILQ_HEAD(, socket) so_incomp; /* (e) queue of partial unaccepted connections */
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TAILQ_HEAD(, socket) so_comp; /* (e) queue of complete unaccepted connections */
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TAILQ_ENTRY(socket) so_list; /* (e) list of unaccepted connections */
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u_short so_qlen; /* (e) number of unaccepted connections */
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u_short so_incqlen; /* (e) number of unaccepted incomplete
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connections */
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u_short so_qlimit; /* (e) max number queued connections */
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short so_timeo; /* (g) connection timeout */
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userland_cond_t timeo_cond; /* timeo_cond condition variable being used in wakeup */
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u_short so_error; /* (f) error affecting connection */
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struct sigio *so_sigio; /* [sg] information for async I/O or
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out of band data (SIGURG) */
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u_long so_oobmark; /* (c) chars to oob mark */
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TAILQ_HEAD(, aiocblist) so_aiojobq; /* AIO ops waiting on socket */
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/*
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* Variables for socket buffering.
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*/
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struct sockbuf {
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/* __Userspace__ Many of these fields may
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* not be required for the sctp stack.
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* Commenting out the following.
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* Including pthread mutex and condition variable to be
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* used by sbwait, sorwakeup and sowwakeup.
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*/
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/* struct selinfo sb_sel;*/ /* process selecting read/write */
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/* struct mtx sb_mtx;*/ /* sockbuf lock */
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/* struct sx sb_sx;*/ /* prevent I/O interlacing */
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userland_cond_t sb_cond; /* sockbuf condition variable */
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userland_mutex_t sb_mtx; /* sockbuf lock associated with sb_cond */
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short sb_state; /* (c/d) socket state on sockbuf */
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#define sb_startzero sb_mb
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struct mbuf *sb_mb; /* (c/d) the mbuf chain */
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struct mbuf *sb_mbtail; /* (c/d) the last mbuf in the chain */
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struct mbuf *sb_lastrecord; /* (c/d) first mbuf of last
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* record in socket buffer */
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struct mbuf *sb_sndptr; /* (c/d) pointer into mbuf chain */
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u_int sb_sndptroff; /* (c/d) byte offset of ptr into chain */
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u_int sb_cc; /* (c/d) actual chars in buffer */
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u_int sb_hiwat; /* (c/d) max actual char count */
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u_int sb_mbcnt; /* (c/d) chars of mbufs used */
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u_int sb_mbmax; /* (c/d) max chars of mbufs to use */
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u_int sb_ctl; /* (c/d) non-data chars in buffer */
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int sb_lowat; /* (c/d) low water mark */
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int sb_timeo; /* (c/d) timeout for read/write */
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short sb_flags; /* (c/d) flags, see below */
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} so_rcv, so_snd;
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/*
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* Constants for sb_flags field of struct sockbuf.
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*/
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#define SB_MAX (256*1024) /* default for max chars in sockbuf */
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#define SB_RAW (64*1024*2) /*Aligning so->so_rcv.sb_hiwat with the receive buffer size of raw socket*/
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/*
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* Constants for sb_flags field of struct sockbuf.
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*/
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#define SB_WAIT 0x04 /* someone is waiting for data/space */
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#define SB_SEL 0x08 /* someone is selecting */
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#define SB_ASYNC 0x10 /* ASYNC I/O, need signals */
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#define SB_UPCALL 0x20 /* someone wants an upcall */
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#define SB_NOINTR 0x40 /* operations not interruptible */
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#define SB_AIO 0x80 /* AIO operations queued */
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#define SB_KNOTE 0x100 /* kernel note attached */
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#define SB_AUTOSIZE 0x800 /* automatically size socket buffer */
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void (*so_upcall)(struct socket *, void *, int);
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void *so_upcallarg;
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struct ucred *so_cred; /* (a) user credentials */
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struct label *so_label; /* (b) MAC label for socket */
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struct label *so_peerlabel; /* (b) cached MAC label for peer */
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/* NB: generation count must not be first. */
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uint32_t so_gencnt; /* (h) generation count */
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void *so_emuldata; /* (b) private data for emulators */
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struct so_accf {
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struct accept_filter *so_accept_filter;
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void *so_accept_filter_arg; /* saved filter args */
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char *so_accept_filter_str; /* saved user args */
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} *so_accf;
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};
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#define SB_EMPTY_FIXUP(sb) do { \
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if ((sb)->sb_mb == NULL) { \
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(sb)->sb_mbtail = NULL; \
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(sb)->sb_lastrecord = NULL; \
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} \
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} while (/*CONSTCOND*/0)
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/*
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* Global accept mutex to serialize access to accept queues and
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* fields associated with multiple sockets. This allows us to
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* avoid defining a lock order between listen and accept sockets
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* until such time as it proves to be a good idea.
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*/
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#if defined(__Userspace_os_Windows)
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extern userland_mutex_t accept_mtx;
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extern userland_cond_t accept_cond;
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#define ACCEPT_LOCK_ASSERT()
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#define ACCEPT_LOCK() do { \
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EnterCriticalSection(&accept_mtx); \
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} while (0)
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#define ACCEPT_UNLOCK() do { \
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LeaveCriticalSection(&accept_mtx); \
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} while (0)
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#define ACCEPT_UNLOCK_ASSERT()
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#else
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extern userland_mutex_t accept_mtx;
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extern userland_cond_t accept_cond;
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#ifdef INVARIANTS
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#define ACCEPT_LOCK() KASSERT(pthread_mutex_lock(&accept_mtx) == 0, ("%s: accept_mtx already locked", __func__))
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#define ACCEPT_UNLOCK() KASSERT(pthread_mutex_unlock(&accept_mtx) == 0, ("%s: accept_mtx not locked", __func__))
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#else
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#define ACCEPT_LOCK() (void)pthread_mutex_lock(&accept_mtx)
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#define ACCEPT_UNLOCK() (void)pthread_mutex_unlock(&accept_mtx)
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#endif
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#define ACCEPT_LOCK_ASSERT() \
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KASSERT(pthread_mutex_trylock(&accept_mtx) == EBUSY, ("%s: accept_mtx not locked", __func__))
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#define ACCEPT_UNLOCK_ASSERT() do { \
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KASSERT(pthread_mutex_trylock(&accept_mtx) == 0, ("%s: accept_mtx locked", __func__)); \
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(void)pthread_mutex_unlock(&accept_mtx); \
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} while (0)
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#endif
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/*
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* Per-socket buffer mutex used to protect most fields in the socket
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* buffer.
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*/
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#define SOCKBUF_MTX(_sb) (&(_sb)->sb_mtx)
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#if defined (__Userspace_os_Windows)
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#define SOCKBUF_LOCK_INIT(_sb, _name) \
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InitializeCriticalSection(SOCKBUF_MTX(_sb))
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#define SOCKBUF_LOCK_DESTROY(_sb) DeleteCriticalSection(SOCKBUF_MTX(_sb))
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#define SOCKBUF_COND_INIT(_sb) InitializeConditionVariable((&(_sb)->sb_cond))
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#define SOCKBUF_COND_DESTROY(_sb) DeleteConditionVariable((&(_sb)->sb_cond))
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#define SOCK_COND_INIT(_so) InitializeConditionVariable((&(_so)->timeo_cond))
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#define SOCK_COND_DESTROY(_so) DeleteConditionVariable((&(_so)->timeo_cond))
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#define SOCK_COND(_so) (&(_so)->timeo_cond)
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#else
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#ifdef INVARIANTS
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#define SOCKBUF_LOCK_INIT(_sb, _name) do { \
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pthread_mutexattr_t mutex_attr; \
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\
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pthread_mutexattr_init(&mutex_attr); \
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pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_ERRORCHECK); \
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pthread_mutex_init(SOCKBUF_MTX(_sb), &mutex_attr); \
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pthread_mutexattr_destroy(&mutex_attr); \
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} while (0)
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#else
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#define SOCKBUF_LOCK_INIT(_sb, _name) \
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pthread_mutex_init(SOCKBUF_MTX(_sb), NULL)
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#endif
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#define SOCKBUF_LOCK_DESTROY(_sb) pthread_mutex_destroy(SOCKBUF_MTX(_sb))
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#define SOCKBUF_COND_INIT(_sb) pthread_cond_init((&(_sb)->sb_cond), NULL)
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#define SOCKBUF_COND_DESTROY(_sb) pthread_cond_destroy((&(_sb)->sb_cond))
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#define SOCK_COND_INIT(_so) pthread_cond_init((&(_so)->timeo_cond), NULL)
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#define SOCK_COND_DESTROY(_so) pthread_cond_destroy((&(_so)->timeo_cond))
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#define SOCK_COND(_so) (&(_so)->timeo_cond)
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#endif
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/*__Userspace__ SOCKBUF_LOCK(_sb) is now defined in netinet/sctp_process_lock.h */
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/* #define SOCKBUF_OWNED(_sb) mtx_owned(SOCKBUF_MTX(_sb)) unused */
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/*__Userspace__ SOCKBUF_UNLOCK(_sb) is now defined in netinet/sctp_process_lock.h */
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/*__Userspace__ SOCKBUF_LOCK_ASSERT(_sb) is now defined in netinet/sctp_process_lock.h */
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/* #define SOCKBUF_UNLOCK_ASSERT(_sb) mtx_assert(SOCKBUF_MTX(_sb), MA_NOTOWNED) unused */
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|
/*
|
||
|
|
* Per-socket mutex: we reuse the receive socket buffer mutex for space
|
||
|
|
* efficiency. This decision should probably be revisited as we optimize
|
||
|
|
* locking for the socket code.
|
||
|
|
*/
|
||
|
|
#define SOCK_MTX(_so) SOCKBUF_MTX(&(_so)->so_rcv)
|
||
|
|
/*__Userspace__ SOCK_LOCK(_so) is now defined in netinet/sctp_process_lock.h */
|
||
|
|
|
||
|
|
/* #define SOCK_OWNED(_so) SOCKBUF_OWNED(&(_so)->so_rcv) unused */
|
||
|
|
/*__Userspace__ SOCK_UNLOCK(_so) is now defined in netinet/sctp_process_lock.h */
|
||
|
|
|
||
|
|
#define SOCK_LOCK_ASSERT(_so) SOCKBUF_LOCK_ASSERT(&(_so)->so_rcv)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Socket state bits.
|
||
|
|
*
|
||
|
|
* Historically, this bits were all kept in the so_state field. For
|
||
|
|
* locking reasons, they are now in multiple fields, as they are
|
||
|
|
* locked differently. so_state maintains basic socket state protected
|
||
|
|
* by the socket lock. so_qstate holds information about the socket
|
||
|
|
* accept queues. Each socket buffer also has a state field holding
|
||
|
|
* information relevant to that socket buffer (can't send, rcv). Many
|
||
|
|
* fields will be read without locks to improve performance and avoid
|
||
|
|
* lock order issues. However, this approach must be used with caution.
|
||
|
|
*/
|
||
|
|
#define SS_NOFDREF 0x0001 /* no file table ref any more */
|
||
|
|
#define SS_ISCONNECTED 0x0002 /* socket connected to a peer */
|
||
|
|
#define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */
|
||
|
|
#define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */
|
||
|
|
#define SS_NBIO 0x0100 /* non-blocking ops */
|
||
|
|
#define SS_ASYNC 0x0200 /* async i/o notify */
|
||
|
|
#define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */
|
||
|
|
#define SS_ISDISCONNECTED 0x2000 /* socket disconnected from peer */
|
||
|
|
/*
|
||
|
|
* Protocols can mark a socket as SS_PROTOREF to indicate that, following
|
||
|
|
* pru_detach, they still want the socket to persist, and will free it
|
||
|
|
* themselves when they are done. Protocols should only ever call sofree()
|
||
|
|
* following setting this flag in pru_detach(), and never otherwise, as
|
||
|
|
* sofree() bypasses socket reference counting.
|
||
|
|
*/
|
||
|
|
#define SS_PROTOREF 0x4000 /* strong protocol reference */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Socket state bits now stored in the socket buffer state field.
|
||
|
|
*/
|
||
|
|
#define SBS_CANTSENDMORE 0x0010 /* can't send more data to peer */
|
||
|
|
#define SBS_CANTRCVMORE 0x0020 /* can't receive more data from peer */
|
||
|
|
#define SBS_RCVATMARK 0x0040 /* at mark on input */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Socket state bits stored in so_qstate.
|
||
|
|
*/
|
||
|
|
#define SQ_INCOMP 0x0800 /* unaccepted, incomplete connection */
|
||
|
|
#define SQ_COMP 0x1000 /* unaccepted, complete connection */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Socket event flags
|
||
|
|
*/
|
||
|
|
#define SCTP_EVENT_READ 0x0001 /* socket is readable */
|
||
|
|
#define SCTP_EVENT_WRITE 0x0002 /* socket is writeable */
|
||
|
|
#define SCTP_EVENT_ERROR 0x0004 /* socket has an error state */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Externalized form of struct socket used by the sysctl(3) interface.
|
||
|
|
*/
|
||
|
|
struct xsocket {
|
||
|
|
size_t xso_len; /* length of this structure */
|
||
|
|
struct socket *xso_so; /* makes a convenient handle sometimes */
|
||
|
|
short so_type;
|
||
|
|
short so_options;
|
||
|
|
short so_linger;
|
||
|
|
short so_state;
|
||
|
|
caddr_t so_pcb; /* another convenient handle */
|
||
|
|
int xso_protocol;
|
||
|
|
int xso_family;
|
||
|
|
u_short so_qlen;
|
||
|
|
u_short so_incqlen;
|
||
|
|
u_short so_qlimit;
|
||
|
|
short so_timeo;
|
||
|
|
u_short so_error;
|
||
|
|
pid_t so_pgid;
|
||
|
|
u_long so_oobmark;
|
||
|
|
struct xsockbuf {
|
||
|
|
u_int sb_cc;
|
||
|
|
u_int sb_hiwat;
|
||
|
|
u_int sb_mbcnt;
|
||
|
|
u_int sb_mbmax;
|
||
|
|
int sb_lowat;
|
||
|
|
int sb_timeo;
|
||
|
|
short sb_flags;
|
||
|
|
} so_rcv, so_snd;
|
||
|
|
uid_t so_uid; /* XXX */
|
||
|
|
};
|
||
|
|
|
||
|
|
#if defined(_KERNEL)
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Macros for sockets and socket buffering.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Do we need to notify the other side when I/O is possible?
|
||
|
|
*/
|
||
|
|
#define sb_notify(sb) (((sb)->sb_flags & (SB_WAIT | SB_SEL | SB_ASYNC | \
|
||
|
|
SB_UPCALL | SB_AIO | SB_KNOTE)) != 0)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* How much space is there in a socket buffer (so->so_snd or so->so_rcv)?
|
||
|
|
* This is problematical if the fields are unsigned, as the space might
|
||
|
|
* still be negative (cc > hiwat or mbcnt > mbmax). Should detect
|
||
|
|
* overflow and return 0. Should use "lmin" but it doesn't exist now.
|
||
|
|
*/
|
||
|
|
#define sbspace(sb) \
|
||
|
|
((long) imin((int)((sb)->sb_hiwat - (sb)->sb_cc), \
|
||
|
|
(int)((sb)->sb_mbmax - (sb)->sb_mbcnt)))
|
||
|
|
|
||
|
|
/* do we have to send all at once on a socket? */
|
||
|
|
#define sosendallatonce(so) \
|
||
|
|
((so)->so_proto->pr_flags & PR_ATOMIC)
|
||
|
|
|
||
|
|
/* can we read something from so? */
|
||
|
|
#define soreadable(so) \
|
||
|
|
((so)->so_rcv.sb_cc >= (so)->so_rcv.sb_lowat || \
|
||
|
|
((so)->so_rcv.sb_state & SBS_CANTRCVMORE) || \
|
||
|
|
!TAILQ_EMPTY(&(so)->so_comp) || (so)->so_error)
|
||
|
|
|
||
|
|
/* can we write something to so? */
|
||
|
|
#define sowriteable(so) \
|
||
|
|
((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \
|
||
|
|
(((so)->so_state&SS_ISCONNECTED) || \
|
||
|
|
((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0)) || \
|
||
|
|
((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \
|
||
|
|
(so)->so_error)
|
||
|
|
|
||
|
|
/* adjust counters in sb reflecting allocation of m */
|
||
|
|
#define sballoc(sb, m) { \
|
||
|
|
(sb)->sb_cc += (m)->m_len; \
|
||
|
|
if ((m)->m_type != MT_DATA && (m)->m_type != MT_OOBDATA) \
|
||
|
|
(sb)->sb_ctl += (m)->m_len; \
|
||
|
|
(sb)->sb_mbcnt += MSIZE; \
|
||
|
|
if ((m)->m_flags & M_EXT) \
|
||
|
|
(sb)->sb_mbcnt += (m)->m_ext.ext_size; \
|
||
|
|
}
|
||
|
|
|
||
|
|
/* adjust counters in sb reflecting freeing of m */
|
||
|
|
#define sbfree(sb, m) { \
|
||
|
|
(sb)->sb_cc -= (m)->m_len; \
|
||
|
|
if ((m)->m_type != MT_DATA && (m)->m_type != MT_OOBDATA) \
|
||
|
|
(sb)->sb_ctl -= (m)->m_len; \
|
||
|
|
(sb)->sb_mbcnt -= MSIZE; \
|
||
|
|
if ((m)->m_flags & M_EXT) \
|
||
|
|
(sb)->sb_mbcnt -= (m)->m_ext.ext_size; \
|
||
|
|
if ((sb)->sb_sndptr == (m)) { \
|
||
|
|
(sb)->sb_sndptr = NULL; \
|
||
|
|
(sb)->sb_sndptroff = 0; \
|
||
|
|
} \
|
||
|
|
if ((sb)->sb_sndptroff != 0) \
|
||
|
|
(sb)->sb_sndptroff -= (m)->m_len; \
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* soref()/sorele() ref-count the socket structure. Note that you must
|
||
|
|
* still explicitly close the socket, but the last ref count will free
|
||
|
|
* the structure.
|
||
|
|
*/
|
||
|
|
#define soref(so) do { \
|
||
|
|
SOCK_LOCK_ASSERT(so); \
|
||
|
|
++(so)->so_count; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define sorele(so) do { \
|
||
|
|
ACCEPT_LOCK_ASSERT(); \
|
||
|
|
SOCK_LOCK_ASSERT(so); \
|
||
|
|
KASSERT((so)->so_count > 0, ("sorele")); \
|
||
|
|
if (--(so)->so_count == 0) \
|
||
|
|
sofree(so); \
|
||
|
|
else { \
|
||
|
|
SOCK_UNLOCK(so); \
|
||
|
|
ACCEPT_UNLOCK(); \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define sotryfree(so) do { \
|
||
|
|
ACCEPT_LOCK_ASSERT(); \
|
||
|
|
SOCK_LOCK_ASSERT(so); \
|
||
|
|
if ((so)->so_count == 0) \
|
||
|
|
sofree(so); \
|
||
|
|
else { \
|
||
|
|
SOCK_UNLOCK(so); \
|
||
|
|
ACCEPT_UNLOCK(); \
|
||
|
|
} \
|
||
|
|
} while(0)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* In sorwakeup() and sowwakeup(), acquire the socket buffer lock to
|
||
|
|
* avoid a non-atomic test-and-wakeup. However, sowakeup is
|
||
|
|
* responsible for releasing the lock if it is called. We unlock only
|
||
|
|
* if we don't call into sowakeup. If any code is introduced that
|
||
|
|
* directly invokes the underlying sowakeup() primitives, it must
|
||
|
|
* maintain the same semantics.
|
||
|
|
*/
|
||
|
|
#define sorwakeup_locked(so) do { \
|
||
|
|
SOCKBUF_LOCK_ASSERT(&(so)->so_rcv); \
|
||
|
|
if (sb_notify(&(so)->so_rcv)) \
|
||
|
|
sowakeup((so), &(so)->so_rcv); \
|
||
|
|
else \
|
||
|
|
SOCKBUF_UNLOCK(&(so)->so_rcv); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define sorwakeup(so) do { \
|
||
|
|
SOCKBUF_LOCK(&(so)->so_rcv); \
|
||
|
|
sorwakeup_locked(so); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define sowwakeup_locked(so) do { \
|
||
|
|
SOCKBUF_LOCK_ASSERT(&(so)->so_snd); \
|
||
|
|
if (sb_notify(&(so)->so_snd)) \
|
||
|
|
sowakeup((so), &(so)->so_snd); \
|
||
|
|
else \
|
||
|
|
SOCKBUF_UNLOCK(&(so)->so_snd); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define sowwakeup(so) do { \
|
||
|
|
SOCKBUF_LOCK(&(so)->so_snd); \
|
||
|
|
sowwakeup_locked(so); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Argument structure for sosetopt et seq. This is in the KERNEL
|
||
|
|
* section because it will never be visible to user code.
|
||
|
|
*/
|
||
|
|
enum sopt_dir { SOPT_GET, SOPT_SET };
|
||
|
|
struct sockopt {
|
||
|
|
enum sopt_dir sopt_dir; /* is this a get or a set? */
|
||
|
|
int sopt_level; /* second arg of [gs]etsockopt */
|
||
|
|
int sopt_name; /* third arg of [gs]etsockopt */
|
||
|
|
void *sopt_val; /* fourth arg of [gs]etsockopt */
|
||
|
|
size_t sopt_valsize; /* (almost) fifth arg of [gs]etsockopt */
|
||
|
|
struct thread *sopt_td; /* calling thread or null if kernel */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct accept_filter {
|
||
|
|
char accf_name[16];
|
||
|
|
void (*accf_callback)
|
||
|
|
(struct socket *so, void *arg, int waitflag);
|
||
|
|
void * (*accf_create)
|
||
|
|
(struct socket *so, char *arg);
|
||
|
|
void (*accf_destroy)
|
||
|
|
(struct socket *so);
|
||
|
|
SLIST_ENTRY(accept_filter) accf_next;
|
||
|
|
};
|
||
|
|
|
||
|
|
extern int maxsockets;
|
||
|
|
extern u_long sb_max;
|
||
|
|
extern struct uma_zone *socket_zone;
|
||
|
|
extern so_gen_t so_gencnt;
|
||
|
|
|
||
|
|
struct mbuf;
|
||
|
|
struct sockaddr;
|
||
|
|
struct ucred;
|
||
|
|
struct uio;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* From uipc_socket and friends
|
||
|
|
*/
|
||
|
|
int do_getopt_accept_filter(struct socket *so, struct sockopt *sopt);
|
||
|
|
int do_setopt_accept_filter(struct socket *so, struct sockopt *sopt);
|
||
|
|
int so_setsockopt(struct socket *so, int level, int optname,
|
||
|
|
void *optval, size_t optlen);
|
||
|
|
int sockargs(struct mbuf **mp, caddr_t buf, int buflen, int type);
|
||
|
|
int getsockaddr(struct sockaddr **namp, caddr_t uaddr, size_t len);
|
||
|
|
void sbappend(struct sockbuf *sb, struct mbuf *m);
|
||
|
|
void sbappend_locked(struct sockbuf *sb, struct mbuf *m);
|
||
|
|
void sbappendstream(struct sockbuf *sb, struct mbuf *m);
|
||
|
|
void sbappendstream_locked(struct sockbuf *sb, struct mbuf *m);
|
||
|
|
int sbappendaddr(struct sockbuf *sb, const struct sockaddr *asa,
|
||
|
|
struct mbuf *m0, struct mbuf *control);
|
||
|
|
int sbappendaddr_locked(struct sockbuf *sb, const struct sockaddr *asa,
|
||
|
|
struct mbuf *m0, struct mbuf *control);
|
||
|
|
int sbappendcontrol(struct sockbuf *sb, struct mbuf *m0,
|
||
|
|
struct mbuf *control);
|
||
|
|
int sbappendcontrol_locked(struct sockbuf *sb, struct mbuf *m0,
|
||
|
|
struct mbuf *control);
|
||
|
|
void sbappendrecord(struct sockbuf *sb, struct mbuf *m0);
|
||
|
|
void sbappendrecord_locked(struct sockbuf *sb, struct mbuf *m0);
|
||
|
|
void sbcheck(struct sockbuf *sb);
|
||
|
|
void sbcompress(struct sockbuf *sb, struct mbuf *m, struct mbuf *n);
|
||
|
|
struct mbuf *
|
||
|
|
sbcreatecontrol(caddr_t p, int size, int type, int level);
|
||
|
|
void sbdestroy(struct sockbuf *sb, struct socket *so);
|
||
|
|
void sbdrop(struct sockbuf *sb, int len);
|
||
|
|
void sbdrop_locked(struct sockbuf *sb, int len);
|
||
|
|
void sbdroprecord(struct sockbuf *sb);
|
||
|
|
void sbdroprecord_locked(struct sockbuf *sb);
|
||
|
|
void sbflush(struct sockbuf *sb);
|
||
|
|
void sbflush_locked(struct sockbuf *sb);
|
||
|
|
void sbrelease(struct sockbuf *sb, struct socket *so);
|
||
|
|
void sbrelease_locked(struct sockbuf *sb, struct socket *so);
|
||
|
|
int sbreserve(struct sockbuf *sb, u_long cc, struct socket *so,
|
||
|
|
struct thread *td);
|
||
|
|
int sbreserve_locked(struct sockbuf *sb, u_long cc, struct socket *so,
|
||
|
|
struct thread *td);
|
||
|
|
struct mbuf *
|
||
|
|
sbsndptr(struct sockbuf *sb, u_int off, u_int len, u_int *moff);
|
||
|
|
void sbtoxsockbuf(struct sockbuf *sb, struct xsockbuf *xsb);
|
||
|
|
int sbwait(struct sockbuf *sb);
|
||
|
|
int sblock(struct sockbuf *sb, int flags);
|
||
|
|
void sbunlock(struct sockbuf *sb);
|
||
|
|
void soabort(struct socket *so);
|
||
|
|
int soaccept(struct socket *so, struct sockaddr **nam);
|
||
|
|
int socheckuid(struct socket *so, uid_t uid);
|
||
|
|
int sobind(struct socket *so, struct sockaddr *nam, struct thread *td);
|
||
|
|
void socantrcvmore(struct socket *so);
|
||
|
|
void socantrcvmore_locked(struct socket *so);
|
||
|
|
void socantsendmore(struct socket *so);
|
||
|
|
void socantsendmore_locked(struct socket *so);
|
||
|
|
int soclose(struct socket *so);
|
||
|
|
int soconnect(struct socket *so, struct sockaddr *nam, struct thread *td);
|
||
|
|
int soconnect2(struct socket *so1, struct socket *so2);
|
||
|
|
int socow_setup(struct mbuf *m0, struct uio *uio);
|
||
|
|
int socreate(int dom, struct socket **aso, int type, int proto,
|
||
|
|
struct ucred *cred, struct thread *td);
|
||
|
|
int sodisconnect(struct socket *so);
|
||
|
|
struct sockaddr *sodupsockaddr(const struct sockaddr *sa, int mflags);
|
||
|
|
void sofree(struct socket *so);
|
||
|
|
int sogetopt(struct socket *so, struct sockopt *sopt);
|
||
|
|
void sohasoutofband(struct socket *so);
|
||
|
|
void soisconnected(struct socket *so);
|
||
|
|
void soisconnecting(struct socket *so);
|
||
|
|
void soisdisconnected(struct socket *so);
|
||
|
|
void soisdisconnecting(struct socket *so);
|
||
|
|
int solisten(struct socket *so, int backlog, struct thread *td);
|
||
|
|
void solisten_proto(struct socket *so, int backlog);
|
||
|
|
int solisten_proto_check(struct socket *so);
|
||
|
|
struct socket *
|
||
|
|
sonewconn(struct socket *head, int connstatus);
|
||
|
|
int sooptcopyin(struct sockopt *sopt, void *buf, size_t len, size_t minlen);
|
||
|
|
int sooptcopyout(struct sockopt *sopt, const void *buf, size_t len);
|
||
|
|
|
||
|
|
/* XXX; prepare mbuf for (__FreeBSD__ < 3) routines. */
|
||
|
|
int soopt_getm(struct sockopt *sopt, struct mbuf **mp);
|
||
|
|
int soopt_mcopyin(struct sockopt *sopt, struct mbuf *m);
|
||
|
|
int soopt_mcopyout(struct sockopt *sopt, struct mbuf *m);
|
||
|
|
|
||
|
|
int sopoll(struct socket *so, int events, struct ucred *active_cred,
|
||
|
|
struct thread *td);
|
||
|
|
int sopoll_generic(struct socket *so, int events,
|
||
|
|
struct ucred *active_cred, struct thread *td);
|
||
|
|
int soreceive(struct socket *so, struct sockaddr **paddr, struct uio *uio,
|
||
|
|
struct mbuf **mp0, struct mbuf **controlp, int *flagsp);
|
||
|
|
int soreceive_generic(struct socket *so, struct sockaddr **paddr,
|
||
|
|
struct uio *uio, struct mbuf **mp0, struct mbuf **controlp,
|
||
|
|
int *flagsp);
|
||
|
|
int soreserve(struct socket *so, u_long sndcc, u_long rcvcc);
|
||
|
|
void sorflush(struct socket *so);
|
||
|
|
int sosend(struct socket *so, struct sockaddr *addr, struct uio *uio,
|
||
|
|
struct mbuf *top, struct mbuf *control, int flags,
|
||
|
|
struct thread *td);
|
||
|
|
int sosend_dgram(struct socket *so, struct sockaddr *addr,
|
||
|
|
struct uio *uio, struct mbuf *top, struct mbuf *control,
|
||
|
|
int flags, struct thread *td);
|
||
|
|
int sosend_generic(struct socket *so, struct sockaddr *addr,
|
||
|
|
struct uio *uio, struct mbuf *top, struct mbuf *control,
|
||
|
|
int flags, struct thread *td);
|
||
|
|
int sosetopt(struct socket *so, struct sockopt *sopt);
|
||
|
|
int soshutdown(struct socket *so, int how);
|
||
|
|
void sotoxsocket(struct socket *so, struct xsocket *xso);
|
||
|
|
void sowakeup(struct socket *so, struct sockbuf *sb);
|
||
|
|
|
||
|
|
#ifdef SOCKBUF_DEBUG
|
||
|
|
void sblastrecordchk(struct sockbuf *, const char *, int);
|
||
|
|
#define SBLASTRECORDCHK(sb) sblastrecordchk((sb), __FILE__, __LINE__)
|
||
|
|
|
||
|
|
void sblastmbufchk(struct sockbuf *, const char *, int);
|
||
|
|
#define SBLASTMBUFCHK(sb) sblastmbufchk((sb), __FILE__, __LINE__)
|
||
|
|
#else
|
||
|
|
#define SBLASTRECORDCHK(sb) /* nothing */
|
||
|
|
#define SBLASTMBUFCHK(sb) /* nothing */
|
||
|
|
#endif /* SOCKBUF_DEBUG */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Accept filter functions (duh).
|
||
|
|
*/
|
||
|
|
int accept_filt_add(struct accept_filter *filt);
|
||
|
|
int accept_filt_del(char *name);
|
||
|
|
struct accept_filter *accept_filt_get(char *name);
|
||
|
|
#ifdef ACCEPT_FILTER_MOD
|
||
|
|
#ifdef SYSCTL_DECL
|
||
|
|
SYSCTL_DECL(_net_inet_accf);
|
||
|
|
#endif
|
||
|
|
int accept_filt_generic_mod_event(module_t mod, int event, void *data);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _KERNEL */
|
||
|
|
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------*/
|
||
|
|
/*-------------------------------------------------------------*/
|
||
|
|
/* __Userspace__ */
|
||
|
|
/*-------------------------------------------------------------*/
|
||
|
|
/*-------------------------------------------------------------*/
|
||
|
|
/* this new __Userspace__ section is to copy portions of the _KERNEL block
|
||
|
|
* above into, avoiding having to port the entire thing at once...
|
||
|
|
* For function prototypes, the full bodies are in user_socket.c .
|
||
|
|
*/
|
||
|
|
#if defined(__Userspace__)
|
||
|
|
|
||
|
|
/* ---------------------------------------------------------- */
|
||
|
|
/* --- function prototypes (implemented in user_socket.c) --- */
|
||
|
|
/* ---------------------------------------------------------- */
|
||
|
|
void soisconnecting(struct socket *so);
|
||
|
|
void soisdisconnecting(struct socket *so);
|
||
|
|
void soisconnected(struct socket *so);
|
||
|
|
struct socket * sonewconn(struct socket *head, int connstatus);
|
||
|
|
void socantrcvmore(struct socket *so);
|
||
|
|
void socantsendmore(struct socket *so);
|
||
|
|
void sofree(struct socket *so);
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/* -------------- */
|
||
|
|
/* --- macros --- */
|
||
|
|
/* -------------- */
|
||
|
|
|
||
|
|
#define soref(so) do { \
|
||
|
|
SOCK_LOCK_ASSERT(so); \
|
||
|
|
++(so)->so_count; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define sorele(so) do { \
|
||
|
|
ACCEPT_LOCK_ASSERT(); \
|
||
|
|
SOCK_LOCK_ASSERT(so); \
|
||
|
|
KASSERT((so)->so_count > 0, ("sorele")); \
|
||
|
|
if (--(so)->so_count == 0) \
|
||
|
|
sofree(so); \
|
||
|
|
else { \
|
||
|
|
SOCK_UNLOCK(so); \
|
||
|
|
ACCEPT_UNLOCK(); \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
|
||
|
|
/* replacing imin with min (user_environment.h) */
|
||
|
|
#define sbspace(sb) \
|
||
|
|
((long) min((int)((sb)->sb_hiwat - (sb)->sb_cc), \
|
||
|
|
(int)((sb)->sb_mbmax - (sb)->sb_mbcnt)))
|
||
|
|
|
||
|
|
/* do we have to send all at once on a socket? */
|
||
|
|
#define sosendallatonce(so) \
|
||
|
|
((so)->so_proto->pr_flags & PR_ATOMIC)
|
||
|
|
|
||
|
|
/* can we read something from so? */
|
||
|
|
#define soreadable(so) \
|
||
|
|
((int)((so)->so_rcv.sb_cc) >= (so)->so_rcv.sb_lowat || \
|
||
|
|
((so)->so_rcv.sb_state & SBS_CANTRCVMORE) || \
|
||
|
|
!TAILQ_EMPTY(&(so)->so_comp) || (so)->so_error)
|
||
|
|
|
||
|
|
#if 0 /* original */
|
||
|
|
#define PR_CONNREQUIRED 0x04 /* from sys/protosw.h "needed" for sowriteable */
|
||
|
|
#define sowriteable(so) \
|
||
|
|
((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \
|
||
|
|
(((so)->so_state&SS_ISCONNECTED) || \
|
||
|
|
((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0)) || \
|
||
|
|
((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \
|
||
|
|
(so)->so_error)
|
||
|
|
#else /* line with PR_CONNREQUIRED removed */
|
||
|
|
/* can we write something to so? */
|
||
|
|
#define sowriteable(so) \
|
||
|
|
((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \
|
||
|
|
(((so)->so_state&SS_ISCONNECTED))) || \
|
||
|
|
((so)->so_snd.sb_state & SBS_CANTSENDMORE) || \
|
||
|
|
(so)->so_error)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
extern void solisten_proto(struct socket *so, int backlog);
|
||
|
|
extern int solisten_proto_check(struct socket *so);
|
||
|
|
extern int sctp_listen(struct socket *so, int backlog, struct proc *p);
|
||
|
|
extern void socantrcvmore_locked(struct socket *so);
|
||
|
|
extern int sctp_bind(struct socket *so, struct sockaddr *addr);
|
||
|
|
extern int sctp6_bind(struct socket *so, struct sockaddr *addr, void *proc);
|
||
|
|
#if defined(__Userspace__)
|
||
|
|
extern int sctpconn_bind(struct socket *so, struct sockaddr *addr);
|
||
|
|
#endif
|
||
|
|
extern int sctp_accept(struct socket *so, struct sockaddr **addr);
|
||
|
|
extern int sctp_attach(struct socket *so, int proto, uint32_t vrf_id);
|
||
|
|
extern int sctp6_attach(struct socket *so, int proto, uint32_t vrf_id);
|
||
|
|
extern int sctp_abort(struct socket *so);
|
||
|
|
extern int sctp6_abort(struct socket *so);
|
||
|
|
extern void sctp_close(struct socket *so);
|
||
|
|
extern int soaccept(struct socket *so, struct sockaddr **nam);
|
||
|
|
extern int solisten(struct socket *so, int backlog);
|
||
|
|
extern int soreserve(struct socket *so, u_long sndcc, u_long rcvcc);
|
||
|
|
extern void sowakeup(struct socket *so, struct sockbuf *sb);
|
||
|
|
extern void wakeup(void *ident, struct socket *so); /*__Userspace__ */
|
||
|
|
extern int uiomove(void *cp, int n, struct uio *uio);
|
||
|
|
extern int sbwait(struct sockbuf *sb);
|
||
|
|
extern int sodisconnect(struct socket *so);
|
||
|
|
extern int soconnect(struct socket *so, struct sockaddr *nam);
|
||
|
|
extern int sctp_disconnect(struct socket *so);
|
||
|
|
extern int sctp_connect(struct socket *so, struct sockaddr *addr);
|
||
|
|
extern int sctp6_connect(struct socket *so, struct sockaddr *addr);
|
||
|
|
#if defined(__Userspace__)
|
||
|
|
extern int sctpconn_connect(struct socket *so, struct sockaddr *addr);
|
||
|
|
#endif
|
||
|
|
extern void sctp_finish(void);
|
||
|
|
|
||
|
|
/* ------------------------------------------------ */
|
||
|
|
/* ----- macros copied from above ---- */
|
||
|
|
/* ------------------------------------------------ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Do we need to notify the other side when I/O is possible?
|
||
|
|
*/
|
||
|
|
#define sb_notify(sb) (((sb)->sb_flags & (SB_WAIT | SB_SEL | SB_ASYNC | \
|
||
|
|
SB_UPCALL | SB_AIO | SB_KNOTE)) != 0)
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* In sorwakeup() and sowwakeup(), acquire the socket buffer lock to
|
||
|
|
* avoid a non-atomic test-and-wakeup. However, sowakeup is
|
||
|
|
* responsible for releasing the lock if it is called. We unlock only
|
||
|
|
* if we don't call into sowakeup. If any code is introduced that
|
||
|
|
* directly invokes the underlying sowakeup() primitives, it must
|
||
|
|
* maintain the same semantics.
|
||
|
|
*/
|
||
|
|
#define sorwakeup_locked(so) do { \
|
||
|
|
SOCKBUF_LOCK_ASSERT(&(so)->so_rcv); \
|
||
|
|
if (sb_notify(&(so)->so_rcv)) \
|
||
|
|
sowakeup((so), &(so)->so_rcv); \
|
||
|
|
else \
|
||
|
|
SOCKBUF_UNLOCK(&(so)->so_rcv); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define sorwakeup(so) do { \
|
||
|
|
SOCKBUF_LOCK(&(so)->so_rcv); \
|
||
|
|
sorwakeup_locked(so); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define sowwakeup_locked(so) do { \
|
||
|
|
SOCKBUF_LOCK_ASSERT(&(so)->so_snd); \
|
||
|
|
if (sb_notify(&(so)->so_snd)) \
|
||
|
|
sowakeup((so), &(so)->so_snd); \
|
||
|
|
else \
|
||
|
|
SOCKBUF_UNLOCK(&(so)->so_snd); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define sowwakeup(so) do { \
|
||
|
|
SOCKBUF_LOCK(&(so)->so_snd); \
|
||
|
|
sowwakeup_locked(so); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* __Userspace__ */
|
||
|
|
|
||
|
|
#endif /* !_SYS_SOCKETVAR_H_ */
|