2 * Copyright (c) 2004 Jeffrey M. Hsu. All rights reserved.
3 * Copyright (c) 2004 The DragonFly Project. All rights reserved.
5 * This code is derived from software contributed to The DragonFly Project
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of The DragonFly Project nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific, prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
30 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * Copyright (c) 1982, 1986, 1988, 1990, 1993
36 * The Regents of the University of California. All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
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50 * 4. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
66 * @(#)uipc_socket.c 8.3 (Berkeley) 4/15/94
67 * $FreeBSD: src/sys/kern/uipc_socket.c,v 1.68.2.24 2003/11/11 17:18:18 silby Exp $
73 #include <sys/param.h>
74 #include <sys/systm.h>
75 #include <sys/fcntl.h>
76 #include <sys/malloc.h>
78 #include <sys/domain.h>
79 #include <sys/file.h> /* for struct knote */
80 #include <sys/kernel.h>
81 #include <sys/event.h>
83 #include <sys/protosw.h>
84 #include <sys/socket.h>
85 #include <sys/socketvar.h>
86 #include <sys/socketops.h>
87 #include <sys/resourcevar.h>
88 #include <sys/signalvar.h>
89 #include <sys/sysctl.h>
92 #include <vm/vm_zone.h>
94 #include <net/netmsg2.h>
96 #include <sys/thread2.h>
97 #include <sys/socketvar2.h>
99 #include <machine/limits.h>
101 extern int tcp_sosnd_agglim;
102 extern int tcp_sosnd_async;
105 static int do_setopt_accept_filter(struct socket *so, struct sockopt *sopt);
108 static void filt_sordetach(struct knote *kn);
109 static int filt_soread(struct knote *kn, long hint);
110 static void filt_sowdetach(struct knote *kn);
111 static int filt_sowrite(struct knote *kn, long hint);
112 static int filt_solisten(struct knote *kn, long hint);
114 static void sodiscard(struct socket *so);
115 static int soclose_sync(struct socket *so, int fflag);
116 static void soclose_fast(struct socket *so);
118 static struct filterops solisten_filtops =
119 { FILTEROP_ISFD|FILTEROP_MPSAFE, NULL, filt_sordetach, filt_solisten };
120 static struct filterops soread_filtops =
121 { FILTEROP_ISFD|FILTEROP_MPSAFE, NULL, filt_sordetach, filt_soread };
122 static struct filterops sowrite_filtops =
123 { FILTEROP_ISFD|FILTEROP_MPSAFE, NULL, filt_sowdetach, filt_sowrite };
124 static struct filterops soexcept_filtops =
125 { FILTEROP_ISFD|FILTEROP_MPSAFE, NULL, filt_sordetach, filt_soread };
127 MALLOC_DEFINE(M_SOCKET, "socket", "socket struct");
128 MALLOC_DEFINE(M_SONAME, "soname", "socket name");
129 MALLOC_DEFINE(M_PCB, "pcb", "protocol control block");
132 static int somaxconn = SOMAXCONN;
133 SYSCTL_INT(_kern_ipc, KIPC_SOMAXCONN, somaxconn, CTLFLAG_RW,
134 &somaxconn, 0, "Maximum pending socket connection queue size");
136 static int use_soclose_fast = 1;
137 SYSCTL_INT(_kern_ipc, OID_AUTO, soclose_fast, CTLFLAG_RW,
138 &use_soclose_fast, 0, "Fast socket close");
140 int use_soaccept_pred_fast = 1;
141 SYSCTL_INT(_kern_ipc, OID_AUTO, soaccept_pred_fast, CTLFLAG_RW,
142 &use_soaccept_pred_fast, 0, "Fast socket accept predication");
145 * Socket operation routines.
146 * These routines are called by the routines in
147 * sys_socket.c or from a system process, and
148 * implement the semantics of socket operations by
149 * switching out to the protocol specific routines.
153 * Get a socket structure, and initialize it.
154 * Note that it would probably be better to allocate socket
155 * and PCB at the same time, but I'm not convinced that all
156 * the protocols can be easily modified to do this.
164 waitmask = waitok ? M_WAITOK : M_NOWAIT;
165 so = kmalloc(sizeof(struct socket), M_SOCKET, M_ZERO|waitmask);
167 /* XXX race condition for reentrant kernel */
168 TAILQ_INIT(&so->so_aiojobq);
169 TAILQ_INIT(&so->so_rcv.ssb_kq.ki_mlist);
170 TAILQ_INIT(&so->so_snd.ssb_kq.ki_mlist);
171 lwkt_token_init(&so->so_rcv.ssb_token, "rcvtok");
172 lwkt_token_init(&so->so_snd.ssb_token, "sndtok");
173 so->so_state = SS_NOFDREF;
180 socreate(int dom, struct socket **aso, int type,
181 int proto, struct thread *td)
183 struct proc *p = td->td_proc;
186 struct pru_attach_info ai;
190 prp = pffindproto(dom, proto, type);
192 prp = pffindtype(dom, type);
194 if (prp == 0 || prp->pr_usrreqs->pru_attach == 0)
195 return (EPROTONOSUPPORT);
197 if (p->p_ucred->cr_prison && jail_socket_unixiproute_only &&
198 prp->pr_domain->dom_family != PF_LOCAL &&
199 prp->pr_domain->dom_family != PF_INET &&
200 prp->pr_domain->dom_family != PF_INET6 &&
201 prp->pr_domain->dom_family != PF_ROUTE) {
202 return (EPROTONOSUPPORT);
205 if (prp->pr_type != type)
207 so = soalloc(p != 0);
212 * Callers of socreate() presumably will connect up a descriptor
213 * and call soclose() if they cannot. This represents our so_refs
214 * (which should be 1) from soalloc().
216 soclrstate(so, SS_NOFDREF);
219 * Set a default port for protocol processing. No action will occur
220 * on the socket on this port until an inpcb is attached to it and
221 * is able to match incoming packets, or until the socket becomes
222 * available to userland.
224 * We normally default the socket to the protocol thread on cpu 0.
225 * If PR_SYNC_PORT is set (unix domain sockets) there is no protocol
226 * thread and all pr_*()/pru_*() calls are executed synchronously.
228 if (prp->pr_flags & PR_SYNC_PORT)
229 so->so_port = &netisr_sync_port;
231 so->so_port = cpu_portfn(0);
233 TAILQ_INIT(&so->so_incomp);
234 TAILQ_INIT(&so->so_comp);
236 so->so_cred = crhold(p->p_ucred);
238 ai.sb_rlimit = &p->p_rlimit[RLIMIT_SBSIZE];
239 ai.p_ucred = p->p_ucred;
240 ai.fd_rdir = p->p_fd->fd_rdir;
243 * Auto-sizing of socket buffers is managed by the protocols and
244 * the appropriate flags must be set in the pru_attach function.
246 error = so_pru_attach(so, proto, &ai);
248 sosetstate(so, SS_NOFDREF);
249 sofree(so); /* from soalloc */
254 * NOTE: Returns referenced socket.
261 sobind(struct socket *so, struct sockaddr *nam, struct thread *td)
265 error = so_pru_bind(so, nam, td);
270 sodealloc(struct socket *so)
272 if (so->so_rcv.ssb_hiwat)
273 (void)chgsbsize(so->so_cred->cr_uidinfo,
274 &so->so_rcv.ssb_hiwat, 0, RLIM_INFINITY);
275 if (so->so_snd.ssb_hiwat)
276 (void)chgsbsize(so->so_cred->cr_uidinfo,
277 &so->so_snd.ssb_hiwat, 0, RLIM_INFINITY);
279 /* remove accept filter if present */
280 if (so->so_accf != NULL)
281 do_setopt_accept_filter(so, NULL);
284 if (so->so_faddr != NULL)
285 kfree(so->so_faddr, M_SONAME);
290 solisten(struct socket *so, int backlog, struct thread *td)
294 short oldopt, oldqlimit;
297 if (so->so_state & (SS_ISCONNECTED | SS_ISCONNECTING))
301 oldopt = so->so_options;
302 oldqlimit = so->so_qlimit;
305 lwkt_gettoken(&so->so_rcv.ssb_token);
306 if (TAILQ_EMPTY(&so->so_comp))
307 so->so_options |= SO_ACCEPTCONN;
308 lwkt_reltoken(&so->so_rcv.ssb_token);
309 if (backlog < 0 || backlog > somaxconn)
311 so->so_qlimit = backlog;
312 /* SCTP needs to look at tweak both the inbound backlog parameter AND
313 * the so_options (UDP model both connect's and gets inbound
314 * connections .. implicitly).
316 error = so_pru_listen(so, td);
319 /* Restore the params */
320 so->so_options = oldopt;
321 so->so_qlimit = oldqlimit;
329 * Destroy a disconnected socket. This routine is a NOP if entities
330 * still have a reference on the socket:
332 * so_pcb - The protocol stack still has a reference
333 * SS_NOFDREF - There is no longer a file pointer reference
336 sofree(struct socket *so)
341 * This is a bit hackish at the moment. We need to interlock
342 * any accept queue we are on before we potentially lose the
343 * last reference to avoid races against a re-reference from
344 * someone operating on the queue.
346 while ((head = so->so_head) != NULL) {
347 lwkt_getpooltoken(head);
348 if (so->so_head == head)
350 lwkt_relpooltoken(head);
354 * Arbitrage the last free.
356 KKASSERT(so->so_refs > 0);
357 if (atomic_fetchadd_int(&so->so_refs, -1) != 1) {
359 lwkt_relpooltoken(head);
363 KKASSERT(so->so_pcb == NULL && (so->so_state & SS_NOFDREF));
364 KKASSERT((so->so_state & SS_ASSERTINPROG) == 0);
367 * We're done, remove ourselves from the accept queue we are
368 * on, if we are on one.
371 if (so->so_state & SS_INCOMP) {
372 TAILQ_REMOVE(&head->so_incomp, so, so_list);
374 } else if (so->so_state & SS_COMP) {
376 * We must not decommission a socket that's
377 * on the accept(2) queue. If we do, then
378 * accept(2) may hang after select(2) indicated
379 * that the listening socket was ready.
381 lwkt_relpooltoken(head);
384 panic("sofree: not queued");
386 soclrstate(so, SS_INCOMP);
388 lwkt_relpooltoken(head);
390 ssb_release(&so->so_snd, so);
396 * Close a socket on last file table reference removal.
397 * Initiate disconnect if connected.
398 * Free socket when disconnect complete.
401 soclose(struct socket *so, int fflag)
405 funsetown(&so->so_sigio);
406 if (!use_soclose_fast ||
407 (so->so_proto->pr_flags & PR_SYNC_PORT) ||
408 (so->so_options & SO_LINGER)) {
409 error = soclose_sync(so, fflag);
418 sodiscard(struct socket *so)
420 lwkt_getpooltoken(so);
421 if (so->so_options & SO_ACCEPTCONN) {
424 while ((sp = TAILQ_FIRST(&so->so_incomp)) != NULL) {
425 TAILQ_REMOVE(&so->so_incomp, sp, so_list);
426 soclrstate(sp, SS_INCOMP);
431 while ((sp = TAILQ_FIRST(&so->so_comp)) != NULL) {
432 TAILQ_REMOVE(&so->so_comp, sp, so_list);
433 soclrstate(sp, SS_COMP);
439 lwkt_relpooltoken(so);
441 if (so->so_state & SS_NOFDREF)
442 panic("soclose: NOFDREF");
443 sosetstate(so, SS_NOFDREF); /* take ref */
447 soclose_sync(struct socket *so, int fflag)
451 if (so->so_pcb == NULL)
453 if (so->so_state & SS_ISCONNECTED) {
454 if ((so->so_state & SS_ISDISCONNECTING) == 0) {
455 error = sodisconnect(so);
459 if (so->so_options & SO_LINGER) {
460 if ((so->so_state & SS_ISDISCONNECTING) &&
463 while (so->so_state & SS_ISCONNECTED) {
464 error = tsleep(&so->so_timeo, PCATCH,
465 "soclos", so->so_linger * hz);
475 error2 = so_pru_detach(so);
481 so_pru_sync(so); /* unpend async sending */
482 sofree(so); /* dispose of ref */
488 soclose_sofree_async_handler(netmsg_t msg)
490 sofree(msg->base.nm_so);
494 soclose_sofree_async(struct socket *so)
496 struct netmsg_base *base = &so->so_clomsg;
498 netmsg_init(base, so, &netisr_apanic_rport, 0,
499 soclose_sofree_async_handler);
500 lwkt_sendmsg(so->so_port, &base->lmsg);
504 soclose_disconn_async_handler(netmsg_t msg)
506 struct socket *so = msg->base.nm_so;
508 if ((so->so_state & SS_ISCONNECTED) &&
509 (so->so_state & SS_ISDISCONNECTING) == 0)
510 so_pru_disconnect_direct(so);
513 so_pru_detach_direct(so);
520 soclose_disconn_async(struct socket *so)
522 struct netmsg_base *base = &so->so_clomsg;
524 netmsg_init(base, so, &netisr_apanic_rport, 0,
525 soclose_disconn_async_handler);
526 lwkt_sendmsg(so->so_port, &base->lmsg);
530 soclose_detach_async_handler(netmsg_t msg)
532 struct socket *so = msg->base.nm_so;
535 so_pru_detach_direct(so);
542 soclose_detach_async(struct socket *so)
544 struct netmsg_base *base = &so->so_clomsg;
546 netmsg_init(base, so, &netisr_apanic_rport, 0,
547 soclose_detach_async_handler);
548 lwkt_sendmsg(so->so_port, &base->lmsg);
552 soclose_fast(struct socket *so)
554 if (so->so_pcb == NULL)
557 if ((so->so_state & SS_ISCONNECTED) &&
558 (so->so_state & SS_ISDISCONNECTING) == 0) {
559 soclose_disconn_async(so);
564 soclose_detach_async(so);
570 soclose_sofree_async(so);
574 * Abort and destroy a socket. Only one abort can be in progress
575 * at any given moment.
578 soabort(struct socket *so)
585 soaborta(struct socket *so)
592 soabort_oncpu(struct socket *so)
595 so_pru_abort_oncpu(so);
599 * so is passed in ref'd, which becomes owned by
600 * the cleared SS_NOFDREF flag.
603 soaccept_generic(struct socket *so)
605 if ((so->so_state & SS_NOFDREF) == 0)
606 panic("soaccept: !NOFDREF");
607 soclrstate(so, SS_NOFDREF); /* owned by lack of SS_NOFDREF */
611 soaccept(struct socket *so, struct sockaddr **nam)
615 soaccept_generic(so);
616 error = so_pru_accept(so, nam);
621 soconnect(struct socket *so, struct sockaddr *nam, struct thread *td)
625 if (so->so_options & SO_ACCEPTCONN)
628 * If protocol is connection-based, can only connect once.
629 * Otherwise, if connected, try to disconnect first.
630 * This allows user to disconnect by connecting to, e.g.,
633 if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) &&
634 ((so->so_proto->pr_flags & PR_CONNREQUIRED) ||
635 (error = sodisconnect(so)))) {
639 * Prevent accumulated error from previous connection
643 error = so_pru_connect(so, nam, td);
649 soconnect2(struct socket *so1, struct socket *so2)
653 error = so_pru_connect2(so1, so2);
658 sodisconnect(struct socket *so)
662 if ((so->so_state & SS_ISCONNECTED) == 0) {
666 if (so->so_state & SS_ISDISCONNECTING) {
670 error = so_pru_disconnect(so);
675 #define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
678 * If send must go all at once and message is larger than
679 * send buffering, then hard error.
680 * Lock against other senders.
681 * If must go all at once and not enough room now, then
682 * inform user that this would block and do nothing.
683 * Otherwise, if nonblocking, send as much as possible.
684 * The data to be sent is described by "uio" if nonzero,
685 * otherwise by the mbuf chain "top" (which must be null
686 * if uio is not). Data provided in mbuf chain must be small
687 * enough to send all at once.
689 * Returns nonzero on error, timeout or signal; callers
690 * must check for short counts if EINTR/ERESTART are returned.
691 * Data and control buffers are freed on return.
694 sosend(struct socket *so, struct sockaddr *addr, struct uio *uio,
695 struct mbuf *top, struct mbuf *control, int flags,
702 int clen = 0, error, dontroute, mlen;
703 int atomic = sosendallatonce(so) || top;
707 resid = uio->uio_resid;
709 resid = (size_t)top->m_pkthdr.len;
712 for (m = top; m; m = m->m_next)
714 KKASSERT(top->m_pkthdr.len == len);
719 * WARNING! resid is unsigned, space and len are signed. space
720 * can wind up negative if the sockbuf is overcommitted.
722 * Also check to make sure that MSG_EOR isn't used on SOCK_STREAM
723 * type sockets since that's an error.
725 if (so->so_type == SOCK_STREAM && (flags & MSG_EOR)) {
731 (flags & MSG_DONTROUTE) && (so->so_options & SO_DONTROUTE) == 0 &&
732 (so->so_proto->pr_flags & PR_ATOMIC);
733 if (td->td_lwp != NULL)
734 td->td_lwp->lwp_ru.ru_msgsnd++;
736 clen = control->m_len;
737 #define gotoerr(errcode) { error = errcode; goto release; }
740 error = ssb_lock(&so->so_snd, SBLOCKWAIT(flags));
745 if (so->so_state & SS_CANTSENDMORE)
748 error = so->so_error;
752 if ((so->so_state & SS_ISCONNECTED) == 0) {
754 * `sendto' and `sendmsg' is allowed on a connection-
755 * based socket if it supports implied connect.
756 * Return ENOTCONN if not connected and no address is
759 if ((so->so_proto->pr_flags & PR_CONNREQUIRED) &&
760 (so->so_proto->pr_flags & PR_IMPLOPCL) == 0) {
761 if ((so->so_state & SS_ISCONFIRMING) == 0 &&
762 !(resid == 0 && clen != 0))
764 } else if (addr == 0)
765 gotoerr(so->so_proto->pr_flags & PR_CONNREQUIRED ?
766 ENOTCONN : EDESTADDRREQ);
768 if ((atomic && resid > so->so_snd.ssb_hiwat) ||
769 clen > so->so_snd.ssb_hiwat) {
772 space = ssb_space(&so->so_snd);
775 if ((space < 0 || (size_t)space < resid + clen) && uio &&
776 (atomic || space < so->so_snd.ssb_lowat || space < clen)) {
777 if (flags & (MSG_FNONBLOCKING|MSG_DONTWAIT))
778 gotoerr(EWOULDBLOCK);
779 ssb_unlock(&so->so_snd);
780 error = ssb_wait(&so->so_snd);
790 * Data is prepackaged in "top".
794 top->m_flags |= M_EOR;
798 m = m_getl((int)resid, MB_WAIT, MT_DATA,
799 top == NULL ? M_PKTHDR : 0, &mlen);
802 m->m_pkthdr.rcvif = NULL;
804 len = imin((int)szmin(mlen, resid), space);
805 if (resid < MINCLSIZE) {
807 * For datagram protocols, leave room
808 * for protocol headers in first mbuf.
810 if (atomic && top == 0 && len < mlen)
814 error = uiomove(mtod(m, caddr_t), (size_t)len, uio);
815 resid = uio->uio_resid;
818 top->m_pkthdr.len += len;
824 top->m_flags |= M_EOR;
827 } while (space > 0 && atomic);
829 so->so_options |= SO_DONTROUTE;
830 if (flags & MSG_OOB) {
831 pru_flags = PRUS_OOB;
832 } else if ((flags & MSG_EOF) &&
833 (so->so_proto->pr_flags & PR_IMPLOPCL) &&
836 * If the user set MSG_EOF, the protocol
837 * understands this flag and nothing left to
838 * send then use PRU_SEND_EOF instead of PRU_SEND.
840 pru_flags = PRUS_EOF;
841 } else if (resid > 0 && space > 0) {
842 /* If there is more to send, set PRUS_MORETOCOME */
843 pru_flags = PRUS_MORETOCOME;
848 * XXX all the SS_CANTSENDMORE checks previously
849 * done could be out of date. We could have recieved
850 * a reset packet in an interrupt or maybe we slept
851 * while doing page faults in uiomove() etc. We could
852 * probably recheck again inside the splnet() protection
853 * here, but there are probably other places that this
854 * also happens. We must rethink this.
856 error = so_pru_send(so, pru_flags, top, addr, control, td);
858 so->so_options &= ~SO_DONTROUTE;
865 } while (resid && space > 0);
869 ssb_unlock(&so->so_snd);
879 * A specialization of sosend() for UDP based on protocol-specific knowledge:
880 * so->so_proto->pr_flags has the PR_ATOMIC field set. This means that
881 * sosendallatonce() returns true,
882 * the "atomic" variable is true,
883 * and sosendudp() blocks until space is available for the entire send.
884 * so->so_proto->pr_flags does not have the PR_CONNREQUIRED or
885 * PR_IMPLOPCL flags set.
886 * UDP has no out-of-band data.
887 * UDP has no control data.
888 * UDP does not support MSG_EOR.
891 sosendudp(struct socket *so, struct sockaddr *addr, struct uio *uio,
892 struct mbuf *top, struct mbuf *control, int flags, struct thread *td)
895 int error, pru_flags = 0;
898 if (td->td_lwp != NULL)
899 td->td_lwp->lwp_ru.ru_msgsnd++;
903 KASSERT((uio && !top) || (top && !uio), ("bad arguments to sosendudp"));
904 resid = uio ? uio->uio_resid : (size_t)top->m_pkthdr.len;
907 error = ssb_lock(&so->so_snd, SBLOCKWAIT(flags));
911 if (so->so_state & SS_CANTSENDMORE)
914 error = so->so_error;
918 if (!(so->so_state & SS_ISCONNECTED) && addr == NULL)
919 gotoerr(EDESTADDRREQ);
920 if (resid > so->so_snd.ssb_hiwat)
922 space = ssb_space(&so->so_snd);
923 if (uio && (space < 0 || (size_t)space < resid)) {
924 if (flags & (MSG_FNONBLOCKING|MSG_DONTWAIT))
925 gotoerr(EWOULDBLOCK);
926 ssb_unlock(&so->so_snd);
927 error = ssb_wait(&so->so_snd);
934 top = m_uiomove(uio);
939 if (flags & MSG_DONTROUTE)
940 pru_flags |= PRUS_DONTROUTE;
942 error = so_pru_send(so, pru_flags, top, addr, NULL, td);
943 top = NULL; /* sent or freed in lower layer */
946 ssb_unlock(&so->so_snd);
954 sosendtcp(struct socket *so, struct sockaddr *addr, struct uio *uio,
955 struct mbuf *top, struct mbuf *control, int flags,
967 KKASSERT(top == NULL);
969 resid = uio->uio_resid;
972 resid = (size_t)top->m_pkthdr.len;
975 for (m = top; m; m = m->m_next)
977 KKASSERT(top->m_pkthdr.len == len);
982 * WARNING! resid is unsigned, space and len are signed. space
983 * can wind up negative if the sockbuf is overcommitted.
985 * Also check to make sure that MSG_EOR isn't used on TCP
987 if (flags & MSG_EOR) {
993 /* TCP doesn't do control messages (rights, creds, etc) */
994 if (control->m_len) {
998 m_freem(control); /* empty control, just free it */
1002 if (td->td_lwp != NULL)
1003 td->td_lwp->lwp_ru.ru_msgsnd++;
1005 #define gotoerr(errcode) { error = errcode; goto release; }
1008 error = ssb_lock(&so->so_snd, SBLOCKWAIT(flags));
1013 if (so->so_state & SS_CANTSENDMORE)
1016 error = so->so_error;
1020 if ((so->so_state & SS_ISCONNECTED) == 0 &&
1021 (so->so_state & SS_ISCONFIRMING) == 0)
1023 if (allatonce && resid > so->so_snd.ssb_hiwat)
1026 space = ssb_space(&so->so_snd);
1027 if (flags & MSG_OOB)
1029 if ((space < 0 || (size_t)space < resid) && !allatonce &&
1030 space < so->so_snd.ssb_lowat) {
1031 if (flags & (MSG_FNONBLOCKING|MSG_DONTWAIT))
1032 gotoerr(EWOULDBLOCK);
1033 ssb_unlock(&so->so_snd);
1034 error = ssb_wait(&so->so_snd);
1041 int cnt = 0, async = 0;
1045 * Data is prepackaged in "top".
1049 if (resid > INT_MAX)
1051 m = m_getl((int)resid, MB_WAIT, MT_DATA,
1052 top == NULL ? M_PKTHDR : 0, &mlen);
1054 m->m_pkthdr.len = 0;
1055 m->m_pkthdr.rcvif = NULL;
1057 len = imin((int)szmin(mlen, resid), space);
1059 error = uiomove(mtod(m, caddr_t), (size_t)len, uio);
1060 resid = uio->uio_resid;
1063 top->m_pkthdr.len += len;
1070 } while (space > 0 && cnt < tcp_sosnd_agglim);
1072 if (tcp_sosnd_async)
1075 if (flags & MSG_OOB) {
1076 pru_flags = PRUS_OOB;
1078 } else if ((flags & MSG_EOF) && resid == 0) {
1079 pru_flags = PRUS_EOF;
1080 } else if (resid > 0 && space > 0) {
1081 /* If there is more to send, set PRUS_MORETOCOME */
1082 pru_flags = PRUS_MORETOCOME;
1088 if (flags & MSG_SYNC)
1092 * XXX all the SS_CANTSENDMORE checks previously
1093 * done could be out of date. We could have recieved
1094 * a reset packet in an interrupt or maybe we slept
1095 * while doing page faults in uiomove() etc. We could
1096 * probably recheck again inside the splnet() protection
1097 * here, but there are probably other places that this
1098 * also happens. We must rethink this.
1101 error = so_pru_send(so, pru_flags, top,
1104 so_pru_send_async(so, pru_flags, top,
1113 } while (resid && space > 0);
1117 ssb_unlock(&so->so_snd);
1127 * Implement receive operations on a socket.
1129 * We depend on the way that records are added to the signalsockbuf
1130 * by sbappend*. In particular, each record (mbufs linked through m_next)
1131 * must begin with an address if the protocol so specifies,
1132 * followed by an optional mbuf or mbufs containing ancillary data,
1133 * and then zero or more mbufs of data.
1135 * Although the signalsockbuf is locked, new data may still be appended.
1136 * A token inside the ssb_lock deals with MP issues and still allows
1137 * the network to access the socket if we block in a uio.
1139 * The caller may receive the data as a single mbuf chain by supplying
1140 * an mbuf **mp0 for use in returning the chain. The uio is then used
1141 * only for the count in uio_resid.
1144 soreceive(struct socket *so, struct sockaddr **psa, struct uio *uio,
1145 struct sockbuf *sio, struct mbuf **controlp, int *flagsp)
1148 struct mbuf *free_chain = NULL;
1149 int flags, len, error, offset;
1150 struct protosw *pr = so->so_proto;
1152 size_t resid, orig_resid;
1155 resid = uio->uio_resid;
1157 resid = (size_t)(sio->sb_climit - sio->sb_cc);
1165 flags = *flagsp &~ MSG_EOR;
1168 if (flags & MSG_OOB) {
1169 m = m_get(MB_WAIT, MT_DATA);
1172 error = so_pru_rcvoob(so, m, flags & MSG_PEEK);
1178 KKASSERT(resid >= (size_t)m->m_len);
1179 resid -= (size_t)m->m_len;
1180 } while (resid > 0 && m);
1183 uio->uio_resid = resid;
1184 error = uiomove(mtod(m, caddr_t),
1185 (int)szmin(resid, m->m_len),
1187 resid = uio->uio_resid;
1189 } while (uio->uio_resid && error == 0 && m);
1196 if ((so->so_state & SS_ISCONFIRMING) && resid)
1200 * The token interlocks against the protocol thread while
1201 * ssb_lock is a blocking lock against other userland entities.
1203 lwkt_gettoken(&so->so_rcv.ssb_token);
1205 error = ssb_lock(&so->so_rcv, SBLOCKWAIT(flags));
1209 m = so->so_rcv.ssb_mb;
1211 * If we have less data than requested, block awaiting more
1212 * (subject to any timeout) if:
1213 * 1. the current count is less than the low water mark, or
1214 * 2. MSG_WAITALL is set, and it is possible to do the entire
1215 * receive operation at once if we block (resid <= hiwat).
1216 * 3. MSG_DONTWAIT is not set
1217 * If MSG_WAITALL is set but resid is larger than the receive buffer,
1218 * we have to do the receive in sections, and thus risk returning
1219 * a short count if a timeout or signal occurs after we start.
1221 if (m == NULL || (((flags & MSG_DONTWAIT) == 0 &&
1222 (size_t)so->so_rcv.ssb_cc < resid) &&
1223 (so->so_rcv.ssb_cc < so->so_rcv.ssb_lowat ||
1224 ((flags & MSG_WAITALL) && resid <= (size_t)so->so_rcv.ssb_hiwat)) &&
1225 m->m_nextpkt == 0 && (pr->pr_flags & PR_ATOMIC) == 0)) {
1226 KASSERT(m != NULL || !so->so_rcv.ssb_cc, ("receive 1"));
1230 error = so->so_error;
1231 if ((flags & MSG_PEEK) == 0)
1235 if (so->so_state & SS_CANTRCVMORE) {
1241 for (; m; m = m->m_next) {
1242 if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) {
1243 m = so->so_rcv.ssb_mb;
1247 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 &&
1248 (pr->pr_flags & PR_CONNREQUIRED)) {
1254 if (flags & (MSG_FNONBLOCKING|MSG_DONTWAIT)) {
1255 error = EWOULDBLOCK;
1258 ssb_unlock(&so->so_rcv);
1259 error = ssb_wait(&so->so_rcv);
1265 if (uio && uio->uio_td && uio->uio_td->td_proc)
1266 uio->uio_td->td_lwp->lwp_ru.ru_msgrcv++;
1269 * note: m should be == sb_mb here. Cache the next record while
1270 * cleaning up. Note that calling m_free*() will break out critical
1273 KKASSERT(m == so->so_rcv.ssb_mb);
1276 * Skip any address mbufs prepending the record.
1278 if (pr->pr_flags & PR_ADDR) {
1279 KASSERT(m->m_type == MT_SONAME, ("receive 1a"));
1282 *psa = dup_sockaddr(mtod(m, struct sockaddr *));
1283 if (flags & MSG_PEEK)
1286 m = sbunlinkmbuf(&so->so_rcv.sb, m, &free_chain);
1290 * Skip any control mbufs prepending the record.
1293 if (pr->pr_flags & PR_ADDR_OPT) {
1295 * For SCTP we may be getting a
1296 * whole message OR a partial delivery.
1298 if (m && m->m_type == MT_SONAME) {
1301 *psa = dup_sockaddr(mtod(m, struct sockaddr *));
1302 if (flags & MSG_PEEK)
1305 m = sbunlinkmbuf(&so->so_rcv.sb, m, &free_chain);
1309 while (m && m->m_type == MT_CONTROL && error == 0) {
1310 if (flags & MSG_PEEK) {
1312 *controlp = m_copy(m, 0, m->m_len);
1313 m = m->m_next; /* XXX race */
1316 n = sbunlinkmbuf(&so->so_rcv.sb, m, NULL);
1317 if (pr->pr_domain->dom_externalize &&
1318 mtod(m, struct cmsghdr *)->cmsg_type ==
1320 error = (*pr->pr_domain->dom_externalize)(m);
1324 m = sbunlinkmbuf(&so->so_rcv.sb, m, &free_chain);
1327 if (controlp && *controlp) {
1329 controlp = &(*controlp)->m_next;
1338 if (type == MT_OOBDATA)
1343 * Copy to the UIO or mbuf return chain (*mp).
1347 while (m && resid > 0 && error == 0) {
1348 if (m->m_type == MT_OOBDATA) {
1349 if (type != MT_OOBDATA)
1351 } else if (type == MT_OOBDATA)
1354 KASSERT(m->m_type == MT_DATA || m->m_type == MT_HEADER,
1356 soclrstate(so, SS_RCVATMARK);
1357 len = (resid > INT_MAX) ? INT_MAX : resid;
1358 if (so->so_oobmark && len > so->so_oobmark - offset)
1359 len = so->so_oobmark - offset;
1360 if (len > m->m_len - moff)
1361 len = m->m_len - moff;
1364 * Copy out to the UIO or pass the mbufs back to the SIO.
1365 * The SIO is dealt with when we eat the mbuf, but deal
1366 * with the resid here either way.
1369 uio->uio_resid = resid;
1370 error = uiomove(mtod(m, caddr_t) + moff, len, uio);
1371 resid = uio->uio_resid;
1375 resid -= (size_t)len;
1379 * Eat the entire mbuf or just a piece of it
1381 if (len == m->m_len - moff) {
1382 if (m->m_flags & M_EOR)
1385 if (m->m_flags & M_NOTIFICATION)
1386 flags |= MSG_NOTIFICATION;
1388 if (flags & MSG_PEEK) {
1393 n = sbunlinkmbuf(&so->so_rcv.sb, m, NULL);
1397 m = sbunlinkmbuf(&so->so_rcv.sb, m, &free_chain);
1401 if (flags & MSG_PEEK) {
1405 n = m_copym(m, 0, len, MB_WAIT);
1411 so->so_rcv.ssb_cc -= len;
1414 if (so->so_oobmark) {
1415 if ((flags & MSG_PEEK) == 0) {
1416 so->so_oobmark -= len;
1417 if (so->so_oobmark == 0) {
1418 sosetstate(so, SS_RCVATMARK);
1423 if (offset == so->so_oobmark)
1427 if (flags & MSG_EOR)
1430 * If the MSG_WAITALL flag is set (for non-atomic socket),
1431 * we must not quit until resid == 0 or an error
1432 * termination. If a signal/timeout occurs, return
1433 * with a short count but without error.
1434 * Keep signalsockbuf locked against other readers.
1436 while ((flags & MSG_WAITALL) && m == NULL &&
1437 resid > 0 && !sosendallatonce(so) &&
1438 so->so_rcv.ssb_mb == NULL) {
1439 if (so->so_error || so->so_state & SS_CANTRCVMORE)
1442 * The window might have closed to zero, make
1443 * sure we send an ack now that we've drained
1444 * the buffer or we might end up blocking until
1445 * the idle takes over (5 seconds).
1447 if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
1448 so_pru_rcvd(so, flags);
1449 error = ssb_wait(&so->so_rcv);
1451 ssb_unlock(&so->so_rcv);
1455 m = so->so_rcv.ssb_mb;
1460 * If an atomic read was requested but unread data still remains
1461 * in the record, set MSG_TRUNC.
1463 if (m && pr->pr_flags & PR_ATOMIC)
1467 * Cleanup. If an atomic read was requested drop any unread data.
1469 if ((flags & MSG_PEEK) == 0) {
1470 if (m && (pr->pr_flags & PR_ATOMIC))
1471 sbdroprecord(&so->so_rcv.sb);
1472 if ((pr->pr_flags & PR_WANTRCVD) && so->so_pcb)
1473 so_pru_rcvd(so, flags);
1476 if (orig_resid == resid && orig_resid &&
1477 (flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) {
1478 ssb_unlock(&so->so_rcv);
1485 ssb_unlock(&so->so_rcv);
1487 lwkt_reltoken(&so->so_rcv.ssb_token);
1489 m_freem(free_chain);
1494 * Shut a socket down. Note that we do not get a frontend lock as we
1495 * want to be able to shut the socket down even if another thread is
1496 * blocked in a read(), thus waking it up.
1499 soshutdown(struct socket *so, int how)
1501 if (!(how == SHUT_RD || how == SHUT_WR || how == SHUT_RDWR))
1504 if (how != SHUT_WR) {
1505 /*ssb_lock(&so->so_rcv, M_WAITOK);*/
1507 /*ssb_unlock(&so->so_rcv);*/
1510 return (so_pru_shutdown(so));
1515 sorflush(struct socket *so)
1517 struct signalsockbuf *ssb = &so->so_rcv;
1518 struct protosw *pr = so->so_proto;
1519 struct signalsockbuf asb;
1521 atomic_set_int(&ssb->ssb_flags, SSB_NOINTR);
1523 lwkt_gettoken(&ssb->ssb_token);
1528 * Can't just blow up the ssb structure here
1530 bzero(&ssb->sb, sizeof(ssb->sb));
1535 atomic_clear_int(&ssb->ssb_flags, SSB_CLEAR_MASK);
1537 if ((pr->pr_flags & PR_RIGHTS) && pr->pr_domain->dom_dispose)
1538 (*pr->pr_domain->dom_dispose)(asb.ssb_mb);
1539 ssb_release(&asb, so);
1541 lwkt_reltoken(&ssb->ssb_token);
1546 do_setopt_accept_filter(struct socket *so, struct sockopt *sopt)
1548 struct accept_filter_arg *afap = NULL;
1549 struct accept_filter *afp;
1550 struct so_accf *af = so->so_accf;
1553 /* do not set/remove accept filters on non listen sockets */
1554 if ((so->so_options & SO_ACCEPTCONN) == 0) {
1559 /* removing the filter */
1562 if (af->so_accept_filter != NULL &&
1563 af->so_accept_filter->accf_destroy != NULL) {
1564 af->so_accept_filter->accf_destroy(so);
1566 if (af->so_accept_filter_str != NULL) {
1567 FREE(af->so_accept_filter_str, M_ACCF);
1572 so->so_options &= ~SO_ACCEPTFILTER;
1575 /* adding a filter */
1576 /* must remove previous filter first */
1581 /* don't put large objects on the kernel stack */
1582 MALLOC(afap, struct accept_filter_arg *, sizeof(*afap), M_TEMP, M_WAITOK);
1583 error = sooptcopyin(sopt, afap, sizeof *afap, sizeof *afap);
1584 afap->af_name[sizeof(afap->af_name)-1] = '\0';
1585 afap->af_arg[sizeof(afap->af_arg)-1] = '\0';
1588 afp = accept_filt_get(afap->af_name);
1593 MALLOC(af, struct so_accf *, sizeof(*af), M_ACCF, M_WAITOK | M_ZERO);
1594 if (afp->accf_create != NULL) {
1595 if (afap->af_name[0] != '\0') {
1596 int len = strlen(afap->af_name) + 1;
1598 MALLOC(af->so_accept_filter_str, char *, len, M_ACCF, M_WAITOK);
1599 strcpy(af->so_accept_filter_str, afap->af_name);
1601 af->so_accept_filter_arg = afp->accf_create(so, afap->af_arg);
1602 if (af->so_accept_filter_arg == NULL) {
1603 FREE(af->so_accept_filter_str, M_ACCF);
1610 af->so_accept_filter = afp;
1612 so->so_options |= SO_ACCEPTFILTER;
1621 * Perhaps this routine, and sooptcopyout(), below, ought to come in
1622 * an additional variant to handle the case where the option value needs
1623 * to be some kind of integer, but not a specific size.
1624 * In addition to their use here, these functions are also called by the
1625 * protocol-level pr_ctloutput() routines.
1628 sooptcopyin(struct sockopt *sopt, void *buf, size_t len, size_t minlen)
1630 return soopt_to_kbuf(sopt, buf, len, minlen);
1634 soopt_to_kbuf(struct sockopt *sopt, void *buf, size_t len, size_t minlen)
1638 KKASSERT(!sopt->sopt_val || kva_p(sopt->sopt_val));
1639 KKASSERT(kva_p(buf));
1642 * If the user gives us more than we wanted, we ignore it,
1643 * but if we don't get the minimum length the caller
1644 * wants, we return EINVAL. On success, sopt->sopt_valsize
1645 * is set to however much we actually retrieved.
1647 if ((valsize = sopt->sopt_valsize) < minlen)
1650 sopt->sopt_valsize = valsize = len;
1652 bcopy(sopt->sopt_val, buf, valsize);
1658 sosetopt(struct socket *so, struct sockopt *sopt)
1664 struct signalsockbuf *sotmp;
1667 sopt->sopt_dir = SOPT_SET;
1668 if (sopt->sopt_level != SOL_SOCKET) {
1669 if (so->so_proto && so->so_proto->pr_ctloutput) {
1670 return (so_pr_ctloutput(so, sopt));
1672 error = ENOPROTOOPT;
1674 switch (sopt->sopt_name) {
1676 case SO_ACCEPTFILTER:
1677 error = do_setopt_accept_filter(so, sopt);
1683 error = sooptcopyin(sopt, &l, sizeof l, sizeof l);
1687 so->so_linger = l.l_linger;
1689 so->so_options |= SO_LINGER;
1691 so->so_options &= ~SO_LINGER;
1697 case SO_USELOOPBACK:
1703 error = sooptcopyin(sopt, &optval, sizeof optval,
1708 so->so_options |= sopt->sopt_name;
1710 so->so_options &= ~sopt->sopt_name;
1717 error = sooptcopyin(sopt, &optval, sizeof optval,
1723 * Values < 1 make no sense for any of these
1724 * options, so disallow them.
1731 switch (sopt->sopt_name) {
1734 if (ssb_reserve(sopt->sopt_name == SO_SNDBUF ?
1735 &so->so_snd : &so->so_rcv, (u_long)optval,
1737 &curproc->p_rlimit[RLIMIT_SBSIZE]) == 0) {
1741 sotmp = (sopt->sopt_name == SO_SNDBUF) ?
1742 &so->so_snd : &so->so_rcv;
1743 atomic_clear_int(&sotmp->ssb_flags,
1748 * Make sure the low-water is never greater than
1752 so->so_snd.ssb_lowat =
1753 (optval > so->so_snd.ssb_hiwat) ?
1754 so->so_snd.ssb_hiwat : optval;
1755 atomic_clear_int(&so->so_snd.ssb_flags,
1759 so->so_rcv.ssb_lowat =
1760 (optval > so->so_rcv.ssb_hiwat) ?
1761 so->so_rcv.ssb_hiwat : optval;
1762 atomic_clear_int(&so->so_rcv.ssb_flags,
1770 error = sooptcopyin(sopt, &tv, sizeof tv,
1775 /* assert(hz > 0); */
1776 if (tv.tv_sec < 0 || tv.tv_sec > INT_MAX / hz ||
1777 tv.tv_usec < 0 || tv.tv_usec >= 1000000) {
1781 /* assert(tick > 0); */
1782 /* assert(ULONG_MAX - INT_MAX >= 1000000); */
1783 val = (u_long)(tv.tv_sec * hz) + tv.tv_usec / ustick;
1784 if (val > INT_MAX) {
1788 if (val == 0 && tv.tv_usec != 0)
1791 switch (sopt->sopt_name) {
1793 so->so_snd.ssb_timeo = val;
1796 so->so_rcv.ssb_timeo = val;
1801 error = ENOPROTOOPT;
1804 if (error == 0 && so->so_proto && so->so_proto->pr_ctloutput) {
1805 (void) so_pr_ctloutput(so, sopt);
1812 /* Helper routine for getsockopt */
1814 sooptcopyout(struct sockopt *sopt, const void *buf, size_t len)
1816 soopt_from_kbuf(sopt, buf, len);
1821 soopt_from_kbuf(struct sockopt *sopt, const void *buf, size_t len)
1826 sopt->sopt_valsize = 0;
1830 KKASSERT(!sopt->sopt_val || kva_p(sopt->sopt_val));
1831 KKASSERT(kva_p(buf));
1834 * Documented get behavior is that we always return a value,
1835 * possibly truncated to fit in the user's buffer.
1836 * Traditional behavior is that we always tell the user
1837 * precisely how much we copied, rather than something useful
1838 * like the total amount we had available for her.
1839 * Note that this interface is not idempotent; the entire answer must
1840 * generated ahead of time.
1842 valsize = szmin(len, sopt->sopt_valsize);
1843 sopt->sopt_valsize = valsize;
1844 if (sopt->sopt_val != 0) {
1845 bcopy(buf, sopt->sopt_val, valsize);
1850 sogetopt(struct socket *so, struct sockopt *sopt)
1857 struct accept_filter_arg *afap;
1861 sopt->sopt_dir = SOPT_GET;
1862 if (sopt->sopt_level != SOL_SOCKET) {
1863 if (so->so_proto && so->so_proto->pr_ctloutput) {
1864 return (so_pr_ctloutput(so, sopt));
1866 return (ENOPROTOOPT);
1868 switch (sopt->sopt_name) {
1870 case SO_ACCEPTFILTER:
1871 if ((so->so_options & SO_ACCEPTCONN) == 0)
1873 MALLOC(afap, struct accept_filter_arg *, sizeof(*afap),
1874 M_TEMP, M_WAITOK | M_ZERO);
1875 if ((so->so_options & SO_ACCEPTFILTER) != 0) {
1876 strcpy(afap->af_name, so->so_accf->so_accept_filter->accf_name);
1877 if (so->so_accf->so_accept_filter_str != NULL)
1878 strcpy(afap->af_arg, so->so_accf->so_accept_filter_str);
1880 error = sooptcopyout(sopt, afap, sizeof(*afap));
1886 l.l_onoff = so->so_options & SO_LINGER;
1887 l.l_linger = so->so_linger;
1888 error = sooptcopyout(sopt, &l, sizeof l);
1891 case SO_USELOOPBACK:
1900 optval = so->so_options & sopt->sopt_name;
1902 error = sooptcopyout(sopt, &optval, sizeof optval);
1906 optval = so->so_type;
1910 optval = so->so_error;
1915 optval = so->so_snd.ssb_hiwat;
1919 optval = so->so_rcv.ssb_hiwat;
1923 optval = so->so_snd.ssb_lowat;
1927 optval = so->so_rcv.ssb_lowat;
1932 optval = (sopt->sopt_name == SO_SNDTIMEO ?
1933 so->so_snd.ssb_timeo : so->so_rcv.ssb_timeo);
1935 tv.tv_sec = optval / hz;
1936 tv.tv_usec = (optval % hz) * ustick;
1937 error = sooptcopyout(sopt, &tv, sizeof tv);
1941 optval_l = ssb_space(&so->so_snd);
1942 error = sooptcopyout(sopt, &optval_l, sizeof(optval_l));
1946 error = ENOPROTOOPT;
1953 /* XXX; prepare mbuf for (__FreeBSD__ < 3) routines. */
1955 soopt_getm(struct sockopt *sopt, struct mbuf **mp)
1957 struct mbuf *m, *m_prev;
1958 int sopt_size = sopt->sopt_valsize, msize;
1960 m = m_getl(sopt_size, sopt->sopt_td ? MB_WAIT : MB_DONTWAIT, MT_DATA,
1964 m->m_len = min(msize, sopt_size);
1965 sopt_size -= m->m_len;
1969 while (sopt_size > 0) {
1970 m = m_getl(sopt_size, sopt->sopt_td ? MB_WAIT : MB_DONTWAIT,
1971 MT_DATA, 0, &msize);
1976 m->m_len = min(msize, sopt_size);
1977 sopt_size -= m->m_len;
1984 /* XXX; copyin sopt data into mbuf chain for (__FreeBSD__ < 3) routines. */
1986 soopt_mcopyin(struct sockopt *sopt, struct mbuf *m)
1988 soopt_to_mbuf(sopt, m);
1993 soopt_to_mbuf(struct sockopt *sopt, struct mbuf *m)
1998 KKASSERT(!sopt->sopt_val || kva_p(sopt->sopt_val));
2000 if (sopt->sopt_val == NULL)
2002 val = sopt->sopt_val;
2003 valsize = sopt->sopt_valsize;
2004 while (m != NULL && valsize >= m->m_len) {
2005 bcopy(val, mtod(m, char *), m->m_len);
2006 valsize -= m->m_len;
2007 val = (caddr_t)val + m->m_len;
2010 if (m != NULL) /* should be allocated enoughly at ip6_sooptmcopyin() */
2011 panic("ip6_sooptmcopyin");
2014 /* XXX; copyout mbuf chain data into soopt for (__FreeBSD__ < 3) routines. */
2016 soopt_mcopyout(struct sockopt *sopt, struct mbuf *m)
2018 return soopt_from_mbuf(sopt, m);
2022 soopt_from_mbuf(struct sockopt *sopt, struct mbuf *m)
2024 struct mbuf *m0 = m;
2029 KKASSERT(!sopt->sopt_val || kva_p(sopt->sopt_val));
2031 if (sopt->sopt_val == NULL)
2033 val = sopt->sopt_val;
2034 maxsize = sopt->sopt_valsize;
2035 while (m != NULL && maxsize >= m->m_len) {
2036 bcopy(mtod(m, char *), val, m->m_len);
2037 maxsize -= m->m_len;
2038 val = (caddr_t)val + m->m_len;
2039 valsize += m->m_len;
2043 /* enough soopt buffer should be given from user-land */
2047 sopt->sopt_valsize = valsize;
2052 sohasoutofband(struct socket *so)
2054 if (so->so_sigio != NULL)
2055 pgsigio(so->so_sigio, SIGURG, 0);
2056 KNOTE(&so->so_rcv.ssb_kq.ki_note, NOTE_OOB);
2060 sokqfilter(struct file *fp, struct knote *kn)
2062 struct socket *so = (struct socket *)kn->kn_fp->f_data;
2063 struct signalsockbuf *ssb;
2065 switch (kn->kn_filter) {
2067 if (so->so_options & SO_ACCEPTCONN)
2068 kn->kn_fop = &solisten_filtops;
2070 kn->kn_fop = &soread_filtops;
2074 kn->kn_fop = &sowrite_filtops;
2078 kn->kn_fop = &soexcept_filtops;
2082 return (EOPNOTSUPP);
2085 knote_insert(&ssb->ssb_kq.ki_note, kn);
2086 atomic_set_int(&ssb->ssb_flags, SSB_KNOTE);
2091 filt_sordetach(struct knote *kn)
2093 struct socket *so = (struct socket *)kn->kn_fp->f_data;
2095 knote_remove(&so->so_rcv.ssb_kq.ki_note, kn);
2096 if (SLIST_EMPTY(&so->so_rcv.ssb_kq.ki_note))
2097 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_KNOTE);
2102 filt_soread(struct knote *kn, long hint)
2104 struct socket *so = (struct socket *)kn->kn_fp->f_data;
2106 if (kn->kn_sfflags & NOTE_OOB) {
2107 if ((so->so_oobmark || (so->so_state & SS_RCVATMARK))) {
2108 kn->kn_fflags |= NOTE_OOB;
2113 kn->kn_data = so->so_rcv.ssb_cc;
2115 if (so->so_state & SS_CANTRCVMORE) {
2117 * Only set NODATA if all data has been exhausted.
2119 if (kn->kn_data == 0)
2120 kn->kn_flags |= EV_NODATA;
2121 kn->kn_flags |= EV_EOF;
2122 kn->kn_fflags = so->so_error;
2125 if (so->so_error) /* temporary udp error */
2127 if (kn->kn_sfflags & NOTE_LOWAT)
2128 return (kn->kn_data >= kn->kn_sdata);
2129 return ((kn->kn_data >= so->so_rcv.ssb_lowat) ||
2130 !TAILQ_EMPTY(&so->so_comp));
2134 filt_sowdetach(struct knote *kn)
2136 struct socket *so = (struct socket *)kn->kn_fp->f_data;
2138 knote_remove(&so->so_snd.ssb_kq.ki_note, kn);
2139 if (SLIST_EMPTY(&so->so_snd.ssb_kq.ki_note))
2140 atomic_clear_int(&so->so_snd.ssb_flags, SSB_KNOTE);
2145 filt_sowrite(struct knote *kn, long hint)
2147 struct socket *so = (struct socket *)kn->kn_fp->f_data;
2149 kn->kn_data = ssb_space(&so->so_snd);
2150 if (so->so_state & SS_CANTSENDMORE) {
2151 kn->kn_flags |= (EV_EOF | EV_NODATA);
2152 kn->kn_fflags = so->so_error;
2155 if (so->so_error) /* temporary udp error */
2157 if (((so->so_state & SS_ISCONNECTED) == 0) &&
2158 (so->so_proto->pr_flags & PR_CONNREQUIRED))
2160 if (kn->kn_sfflags & NOTE_LOWAT)
2161 return (kn->kn_data >= kn->kn_sdata);
2162 return (kn->kn_data >= so->so_snd.ssb_lowat);
2167 filt_solisten(struct knote *kn, long hint)
2169 struct socket *so = (struct socket *)kn->kn_fp->f_data;
2171 kn->kn_data = so->so_qlen;
2172 return (! TAILQ_EMPTY(&so->so_comp));