Annotation of src/sys/kern/uipc_socket.c, Revision 1.144.4.4
1.144.4.4! mjf 1: /* $NetBSD: uipc_socket.c,v 1.151 2008/02/06 21:57:54 ad Exp $ */
1.64 thorpej 2:
3: /*-
1.137 ad 4: * Copyright (c) 2002, 2007 The NetBSD Foundation, Inc.
1.64 thorpej 5: * All rights reserved.
6: *
7: * This code is derived from software contributed to The NetBSD Foundation
8: * by Jason R. Thorpe of Wasabi Systems, Inc.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed by the NetBSD
21: * Foundation, Inc. and its contributors.
22: * 4. Neither the name of The NetBSD Foundation nor the names of its
23: * contributors may be used to endorse or promote products derived
24: * from this software without specific prior written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36: * POSSIBILITY OF SUCH DAMAGE.
37: */
1.16 cgd 38:
1.1 cgd 39: /*
1.15 mycroft 40: * Copyright (c) 1982, 1986, 1988, 1990, 1993
41: * The Regents of the University of California. All rights reserved.
1.1 cgd 42: *
43: * Redistribution and use in source and binary forms, with or without
44: * modification, are permitted provided that the following conditions
45: * are met:
46: * 1. Redistributions of source code must retain the above copyright
47: * notice, this list of conditions and the following disclaimer.
48: * 2. Redistributions in binary form must reproduce the above copyright
49: * notice, this list of conditions and the following disclaimer in the
50: * documentation and/or other materials provided with the distribution.
1.85 agc 51: * 3. Neither the name of the University nor the names of its contributors
1.1 cgd 52: * may be used to endorse or promote products derived from this software
53: * without specific prior written permission.
54: *
55: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65: * SUCH DAMAGE.
66: *
1.32 fvdl 67: * @(#)uipc_socket.c 8.6 (Berkeley) 5/2/95
1.1 cgd 68: */
1.59 lukem 69:
70: #include <sys/cdefs.h>
1.144.4.4! mjf 71: __KERNEL_RCSID(0, "$NetBSD: uipc_socket.c,v 1.151 2008/02/06 21:57:54 ad Exp $");
1.64 thorpej 72:
73: #include "opt_sock_counters.h"
74: #include "opt_sosend_loan.h"
1.81 martin 75: #include "opt_mbuftrace.h"
1.84 ragge 76: #include "opt_somaxkva.h"
1.1 cgd 77:
1.9 mycroft 78: #include <sys/param.h>
79: #include <sys/systm.h>
80: #include <sys/proc.h>
81: #include <sys/file.h>
1.142 dyoung 82: #include <sys/filedesc.h>
1.9 mycroft 83: #include <sys/malloc.h>
84: #include <sys/mbuf.h>
85: #include <sys/domain.h>
86: #include <sys/kernel.h>
87: #include <sys/protosw.h>
88: #include <sys/socket.h>
89: #include <sys/socketvar.h>
1.21 christos 90: #include <sys/signalvar.h>
1.9 mycroft 91: #include <sys/resourcevar.h>
1.37 thorpej 92: #include <sys/pool.h>
1.72 jdolecek 93: #include <sys/event.h>
1.89 christos 94: #include <sys/poll.h>
1.118 elad 95: #include <sys/kauth.h>
1.136 ad 96: #include <sys/mutex.h>
97: #include <sys/condvar.h>
1.37 thorpej 98:
1.64 thorpej 99: #include <uvm/uvm.h>
100:
1.135 ad 101: POOL_INIT(socket_pool, sizeof(struct socket), 0, 0, 0, "sockpl", NULL,
102: IPL_SOFTNET);
1.77 thorpej 103:
104: MALLOC_DEFINE(M_SOOPTS, "soopts", "socket options");
105: MALLOC_DEFINE(M_SONAME, "soname", "socket name");
1.37 thorpej 106:
1.142 dyoung 107: extern const struct fileops socketops;
108:
1.54 lukem 109: extern int somaxconn; /* patchable (XXX sysctl) */
110: int somaxconn = SOMAXCONN;
1.49 jonathan 111:
1.64 thorpej 112: #ifdef SOSEND_COUNTERS
113: #include <sys/device.h>
114:
1.113 thorpej 115: static struct evcnt sosend_loan_big = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
1.64 thorpej 116: NULL, "sosend", "loan big");
1.113 thorpej 117: static struct evcnt sosend_copy_big = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
1.64 thorpej 118: NULL, "sosend", "copy big");
1.113 thorpej 119: static struct evcnt sosend_copy_small = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
1.64 thorpej 120: NULL, "sosend", "copy small");
1.113 thorpej 121: static struct evcnt sosend_kvalimit = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
1.64 thorpej 122: NULL, "sosend", "kva limit");
123:
124: #define SOSEND_COUNTER_INCR(ev) (ev)->ev_count++
125:
1.101 matt 126: EVCNT_ATTACH_STATIC(sosend_loan_big);
127: EVCNT_ATTACH_STATIC(sosend_copy_big);
128: EVCNT_ATTACH_STATIC(sosend_copy_small);
129: EVCNT_ATTACH_STATIC(sosend_kvalimit);
1.64 thorpej 130: #else
131:
132: #define SOSEND_COUNTER_INCR(ev) /* nothing */
133:
134: #endif /* SOSEND_COUNTERS */
135:
1.119 yamt 136: static struct callback_entry sokva_reclaimerentry;
1.1 cgd 137:
1.71 thorpej 138: #ifdef SOSEND_NO_LOAN
1.121 yamt 139: int sock_loan_thresh = -1;
1.71 thorpej 140: #else
1.121 yamt 141: int sock_loan_thresh = 4096;
1.65 thorpej 142: #endif
1.64 thorpej 143:
1.136 ad 144: static kmutex_t so_pendfree_lock;
1.113 thorpej 145: static struct mbuf *so_pendfree;
1.64 thorpej 146:
1.84 ragge 147: #ifndef SOMAXKVA
148: #define SOMAXKVA (16 * 1024 * 1024)
149: #endif
150: int somaxkva = SOMAXKVA;
1.113 thorpej 151: static int socurkva;
1.136 ad 152: static kcondvar_t socurkva_cv;
1.64 thorpej 153:
154: #define SOCK_LOAN_CHUNK 65536
155:
1.117 yamt 156: static size_t sodopendfree(void);
157: static size_t sodopendfreel(void);
1.93 yamt 158:
1.113 thorpej 159: static vsize_t
1.129 yamt 160: sokvareserve(struct socket *so, vsize_t len)
1.80 yamt 161: {
1.98 christos 162: int error;
1.80 yamt 163:
1.136 ad 164: mutex_enter(&so_pendfree_lock);
1.80 yamt 165: while (socurkva + len > somaxkva) {
1.93 yamt 166: size_t freed;
167:
168: /*
169: * try to do pendfree.
170: */
171:
1.117 yamt 172: freed = sodopendfreel();
1.93 yamt 173:
174: /*
175: * if some kva was freed, try again.
176: */
177:
178: if (freed)
1.80 yamt 179: continue;
1.93 yamt 180:
1.80 yamt 181: SOSEND_COUNTER_INCR(&sosend_kvalimit);
1.136 ad 182: error = cv_wait_sig(&socurkva_cv, &so_pendfree_lock);
1.98 christos 183: if (error) {
184: len = 0;
185: break;
186: }
1.80 yamt 187: }
1.93 yamt 188: socurkva += len;
1.136 ad 189: mutex_exit(&so_pendfree_lock);
1.98 christos 190: return len;
1.95 yamt 191: }
192:
1.113 thorpej 193: static void
1.95 yamt 194: sokvaunreserve(vsize_t len)
195: {
196:
1.136 ad 197: mutex_enter(&so_pendfree_lock);
1.95 yamt 198: socurkva -= len;
1.136 ad 199: cv_broadcast(&socurkva_cv);
200: mutex_exit(&so_pendfree_lock);
1.95 yamt 201: }
202:
203: /*
204: * sokvaalloc: allocate kva for loan.
205: */
206:
207: vaddr_t
208: sokvaalloc(vsize_t len, struct socket *so)
209: {
210: vaddr_t lva;
211:
212: /*
213: * reserve kva.
214: */
215:
1.98 christos 216: if (sokvareserve(so, len) == 0)
217: return 0;
1.93 yamt 218:
219: /*
220: * allocate kva.
221: */
1.80 yamt 222:
1.109 yamt 223: lva = uvm_km_alloc(kernel_map, len, 0, UVM_KMF_VAONLY | UVM_KMF_WAITVA);
1.95 yamt 224: if (lva == 0) {
225: sokvaunreserve(len);
1.80 yamt 226: return (0);
1.95 yamt 227: }
1.80 yamt 228:
229: return lva;
230: }
231:
1.93 yamt 232: /*
233: * sokvafree: free kva for loan.
234: */
235:
1.80 yamt 236: void
237: sokvafree(vaddr_t sva, vsize_t len)
238: {
1.93 yamt 239:
240: /*
241: * free kva.
242: */
1.80 yamt 243:
1.109 yamt 244: uvm_km_free(kernel_map, sva, len, UVM_KMF_VAONLY);
1.93 yamt 245:
246: /*
247: * unreserve kva.
248: */
249:
1.95 yamt 250: sokvaunreserve(len);
1.80 yamt 251: }
252:
1.64 thorpej 253: static void
1.134 christos 254: sodoloanfree(struct vm_page **pgs, void *buf, size_t size)
1.64 thorpej 255: {
256: vaddr_t va, sva, eva;
257: vsize_t len;
258: paddr_t pa;
259: int i, npgs;
260:
261: eva = round_page((vaddr_t) buf + size);
262: sva = trunc_page((vaddr_t) buf);
263: len = eva - sva;
264: npgs = len >> PAGE_SHIFT;
265:
1.79 thorpej 266: if (__predict_false(pgs == NULL)) {
267: pgs = alloca(npgs * sizeof(*pgs));
1.64 thorpej 268:
1.79 thorpej 269: for (i = 0, va = sva; va < eva; i++, va += PAGE_SIZE) {
1.133 thorpej 270: if (pmap_extract(pmap_kernel(), va, &pa) == false)
1.79 thorpej 271: panic("sodoloanfree: va 0x%lx not mapped", va);
272: pgs[i] = PHYS_TO_VM_PAGE(pa);
273: }
1.64 thorpej 274: }
275:
276: pmap_kremove(sva, len);
277: pmap_update(pmap_kernel());
278: uvm_unloan(pgs, npgs, UVM_LOAN_TOPAGE);
1.80 yamt 279: sokvafree(sva, len);
1.64 thorpej 280: }
281:
282: static size_t
1.117 yamt 283: sodopendfree()
1.64 thorpej 284: {
1.93 yamt 285: size_t rv;
1.64 thorpej 286:
1.136 ad 287: mutex_enter(&so_pendfree_lock);
1.117 yamt 288: rv = sodopendfreel();
1.136 ad 289: mutex_exit(&so_pendfree_lock);
1.93 yamt 290:
291: return rv;
292: }
293:
294: /*
295: * sodopendfreel: free mbufs on "pendfree" list.
1.136 ad 296: * unlock and relock so_pendfree_lock when freeing mbufs.
1.93 yamt 297: *
1.136 ad 298: * => called with so_pendfree_lock held.
1.93 yamt 299: */
300:
301: static size_t
1.117 yamt 302: sodopendfreel()
1.93 yamt 303: {
1.137 ad 304: struct mbuf *m, *next;
1.93 yamt 305: size_t rv = 0;
306:
1.136 ad 307: KASSERT(mutex_owned(&so_pendfree_lock));
1.64 thorpej 308:
1.137 ad 309: while (so_pendfree != NULL) {
1.64 thorpej 310: m = so_pendfree;
1.93 yamt 311: so_pendfree = NULL;
1.136 ad 312: mutex_exit(&so_pendfree_lock);
1.93 yamt 313:
314: for (; m != NULL; m = next) {
315: next = m->m_next;
316:
317: rv += m->m_ext.ext_size;
318: sodoloanfree((m->m_flags & M_EXT_PAGES) ?
319: m->m_ext.ext_pgs : NULL, m->m_ext.ext_buf,
320: m->m_ext.ext_size);
1.144.4.1 mjf 321: pool_cache_put(mb_cache, m);
1.93 yamt 322: }
1.64 thorpej 323:
1.136 ad 324: mutex_enter(&so_pendfree_lock);
1.64 thorpej 325: }
326:
327: return (rv);
328: }
329:
1.80 yamt 330: void
1.134 christos 331: soloanfree(struct mbuf *m, void *buf, size_t size, void *arg)
1.64 thorpej 332: {
333:
334: if (m == NULL) {
1.93 yamt 335:
336: /*
337: * called from MEXTREMOVE.
338: */
339:
1.79 thorpej 340: sodoloanfree(NULL, buf, size);
1.64 thorpej 341: return;
342: }
343:
1.93 yamt 344: /*
345: * postpone freeing mbuf.
346: *
347: * we can't do it in interrupt context
348: * because we need to put kva back to kernel_map.
349: */
350:
1.136 ad 351: mutex_enter(&so_pendfree_lock);
1.92 yamt 352: m->m_next = so_pendfree;
353: so_pendfree = m;
1.136 ad 354: cv_broadcast(&socurkva_cv);
355: mutex_exit(&so_pendfree_lock);
1.64 thorpej 356: }
357:
358: static long
359: sosend_loan(struct socket *so, struct uio *uio, struct mbuf *m, long space)
360: {
361: struct iovec *iov = uio->uio_iov;
362: vaddr_t sva, eva;
363: vsize_t len;
364: vaddr_t lva, va;
1.80 yamt 365: int npgs, i, error;
1.64 thorpej 366:
1.116 yamt 367: if (VMSPACE_IS_KERNEL_P(uio->uio_vmspace))
1.64 thorpej 368: return (0);
369:
370: if (iov->iov_len < (size_t) space)
371: space = iov->iov_len;
372: if (space > SOCK_LOAN_CHUNK)
373: space = SOCK_LOAN_CHUNK;
374:
375: eva = round_page((vaddr_t) iov->iov_base + space);
376: sva = trunc_page((vaddr_t) iov->iov_base);
377: len = eva - sva;
378: npgs = len >> PAGE_SHIFT;
379:
1.79 thorpej 380: /* XXX KDASSERT */
381: KASSERT(npgs <= M_EXT_MAXPAGES);
382:
1.80 yamt 383: lva = sokvaalloc(len, so);
1.64 thorpej 384: if (lva == 0)
1.80 yamt 385: return 0;
1.64 thorpej 386:
1.116 yamt 387: error = uvm_loan(&uio->uio_vmspace->vm_map, sva, len,
1.79 thorpej 388: m->m_ext.ext_pgs, UVM_LOAN_TOPAGE);
1.64 thorpej 389: if (error) {
1.80 yamt 390: sokvafree(lva, len);
1.64 thorpej 391: return (0);
392: }
393:
394: for (i = 0, va = lva; i < npgs; i++, va += PAGE_SIZE)
1.79 thorpej 395: pmap_kenter_pa(va, VM_PAGE_TO_PHYS(m->m_ext.ext_pgs[i]),
396: VM_PROT_READ);
1.64 thorpej 397: pmap_update(pmap_kernel());
398:
399: lva += (vaddr_t) iov->iov_base & PAGE_MASK;
400:
1.134 christos 401: MEXTADD(m, (void *) lva, space, M_MBUF, soloanfree, so);
1.79 thorpej 402: m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP;
1.64 thorpej 403:
404: uio->uio_resid -= space;
405: /* uio_offset not updated, not set/used for write(2) */
1.134 christos 406: uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + space;
1.64 thorpej 407: uio->uio_iov->iov_len -= space;
408: if (uio->uio_iov->iov_len == 0) {
409: uio->uio_iov++;
410: uio->uio_iovcnt--;
411: }
412:
413: return (space);
414: }
415:
1.119 yamt 416: static int
1.129 yamt 417: sokva_reclaim_callback(struct callback_entry *ce, void *obj, void *arg)
1.119 yamt 418: {
419:
420: KASSERT(ce == &sokva_reclaimerentry);
421: KASSERT(obj == NULL);
422:
423: sodopendfree();
424: if (!vm_map_starved_p(kernel_map)) {
425: return CALLBACK_CHAIN_ABORT;
426: }
427: return CALLBACK_CHAIN_CONTINUE;
428: }
429:
1.142 dyoung 430: struct mbuf *
1.144.4.2 mjf 431: getsombuf(struct socket *so, int type)
1.142 dyoung 432: {
433: struct mbuf *m;
434:
1.144.4.2 mjf 435: m = m_get(M_WAIT, type);
1.142 dyoung 436: MCLAIM(m, so->so_mowner);
437: return m;
438: }
439:
440: struct mbuf *
441: m_intopt(struct socket *so, int val)
442: {
443: struct mbuf *m;
444:
1.144.4.2 mjf 445: m = getsombuf(so, MT_SOOPTS);
1.142 dyoung 446: m->m_len = sizeof(int);
447: *mtod(m, int *) = val;
448: return m;
449: }
450:
1.119 yamt 451: void
452: soinit(void)
453: {
454:
1.144.4.2 mjf 455: mutex_init(&so_pendfree_lock, MUTEX_DEFAULT, IPL_VM);
1.136 ad 456: cv_init(&socurkva_cv, "sokva");
457:
1.119 yamt 458: /* Set the initial adjusted socket buffer size. */
459: if (sb_max_set(sb_max))
460: panic("bad initial sb_max value: %lu", sb_max);
461:
462: callback_register(&vm_map_to_kernel(kernel_map)->vmk_reclaim_callback,
463: &sokva_reclaimerentry, NULL, sokva_reclaim_callback);
464: }
465:
1.1 cgd 466: /*
467: * Socket operation routines.
468: * These routines are called by the routines in
469: * sys_socket.c or from a system process, and
470: * implement the semantics of socket operations by
471: * switching out to the protocol specific routines.
472: */
473: /*ARGSUSED*/
1.3 andrew 474: int
1.114 christos 475: socreate(int dom, struct socket **aso, int type, int proto, struct lwp *l)
1.1 cgd 476: {
1.99 matt 477: const struct protosw *prp;
1.54 lukem 478: struct socket *so;
1.115 yamt 479: uid_t uid;
1.54 lukem 480: int error, s;
1.1 cgd 481:
1.132 elad 482: error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET,
483: KAUTH_REQ_NETWORK_SOCKET_OPEN, KAUTH_ARG(dom), KAUTH_ARG(type),
484: KAUTH_ARG(proto));
1.140 dyoung 485: if (error != 0)
486: return error;
1.127 elad 487:
1.1 cgd 488: if (proto)
489: prp = pffindproto(dom, proto, type);
490: else
491: prp = pffindtype(dom, type);
1.140 dyoung 492: if (prp == NULL) {
1.120 ginsbach 493: /* no support for domain */
494: if (pffinddomain(dom) == 0)
1.140 dyoung 495: return EAFNOSUPPORT;
1.120 ginsbach 496: /* no support for socket type */
497: if (proto == 0 && type != 0)
1.140 dyoung 498: return EPROTOTYPE;
499: return EPROTONOSUPPORT;
1.120 ginsbach 500: }
1.140 dyoung 501: if (prp->pr_usrreq == NULL)
502: return EPROTONOSUPPORT;
1.1 cgd 503: if (prp->pr_type != type)
1.140 dyoung 504: return EPROTOTYPE;
1.39 matt 505: s = splsoftnet();
1.37 thorpej 506: so = pool_get(&socket_pool, PR_WAITOK);
1.140 dyoung 507: memset(so, 0, sizeof(*so));
1.31 thorpej 508: TAILQ_INIT(&so->so_q0);
509: TAILQ_INIT(&so->so_q);
1.1 cgd 510: so->so_type = type;
511: so->so_proto = prp;
1.33 matt 512: so->so_send = sosend;
513: so->so_receive = soreceive;
1.78 matt 514: #ifdef MBUFTRACE
515: so->so_rcv.sb_mowner = &prp->pr_domain->dom_mowner;
516: so->so_snd.sb_mowner = &prp->pr_domain->dom_mowner;
517: so->so_mowner = &prp->pr_domain->dom_mowner;
518: #endif
1.143 ad 519: selinit(&so->so_rcv.sb_sel);
520: selinit(&so->so_snd.sb_sel);
1.138 rmind 521: uid = kauth_cred_geteuid(l->l_cred);
1.115 yamt 522: so->so_uidinfo = uid_find(uid);
1.140 dyoung 523: error = (*prp->pr_usrreq)(so, PRU_ATTACH, NULL,
524: (struct mbuf *)(long)proto, NULL, l);
525: if (error != 0) {
1.1 cgd 526: so->so_state |= SS_NOFDREF;
527: sofree(so);
1.39 matt 528: splx(s);
1.140 dyoung 529: return error;
1.1 cgd 530: }
1.39 matt 531: splx(s);
1.1 cgd 532: *aso = so;
1.140 dyoung 533: return 0;
1.1 cgd 534: }
535:
1.142 dyoung 536: /* On success, write file descriptor to fdout and return zero. On
537: * failure, return non-zero; *fdout will be undefined.
538: */
539: int
540: fsocreate(int domain, struct socket **sop, int type, int protocol,
541: struct lwp *l, int *fdout)
542: {
543: struct filedesc *fdp;
544: struct socket *so;
545: struct file *fp;
546: int fd, error;
547:
548: fdp = l->l_proc->p_fd;
549: /* falloc() will use the desciptor for us */
550: if ((error = falloc(l, &fp, &fd)) != 0)
551: return (error);
552: fp->f_flag = FREAD|FWRITE;
553: fp->f_type = DTYPE_SOCKET;
554: fp->f_ops = &socketops;
555: error = socreate(domain, &so, type, protocol, l);
556: if (error != 0) {
557: FILE_UNUSE(fp, l);
558: fdremove(fdp, fd);
559: ffree(fp);
560: } else {
561: if (sop != NULL)
562: *sop = so;
563: fp->f_data = so;
564: FILE_SET_MATURE(fp);
565: FILE_UNUSE(fp, l);
566: *fdout = fd;
567: }
568: return error;
569: }
570:
1.3 andrew 571: int
1.114 christos 572: sobind(struct socket *so, struct mbuf *nam, struct lwp *l)
1.1 cgd 573: {
1.54 lukem 574: int s, error;
1.1 cgd 575:
1.54 lukem 576: s = splsoftnet();
1.140 dyoung 577: error = (*so->so_proto->pr_usrreq)(so, PRU_BIND, NULL, nam, NULL, l);
1.1 cgd 578: splx(s);
1.140 dyoung 579: return error;
1.1 cgd 580: }
581:
1.3 andrew 582: int
1.144.4.3 mjf 583: solisten(struct socket *so, int backlog, struct lwp *l)
1.1 cgd 584: {
1.54 lukem 585: int s, error;
1.1 cgd 586:
1.54 lukem 587: s = splsoftnet();
1.140 dyoung 588: error = (*so->so_proto->pr_usrreq)(so, PRU_LISTEN, NULL,
1.144.4.3 mjf 589: NULL, NULL, l);
1.140 dyoung 590: if (error != 0) {
1.1 cgd 591: splx(s);
1.140 dyoung 592: return error;
1.1 cgd 593: }
1.63 matt 594: if (TAILQ_EMPTY(&so->so_q))
1.1 cgd 595: so->so_options |= SO_ACCEPTCONN;
596: if (backlog < 0)
597: backlog = 0;
1.49 jonathan 598: so->so_qlimit = min(backlog, somaxconn);
1.1 cgd 599: splx(s);
1.140 dyoung 600: return 0;
1.1 cgd 601: }
602:
1.21 christos 603: void
1.54 lukem 604: sofree(struct socket *so)
1.1 cgd 605: {
606:
1.43 mycroft 607: if (so->so_pcb || (so->so_state & SS_NOFDREF) == 0)
1.1 cgd 608: return;
1.43 mycroft 609: if (so->so_head) {
610: /*
611: * We must not decommission a socket that's on the accept(2)
612: * queue. If we do, then accept(2) may hang after select(2)
613: * indicated that the listening socket was ready.
614: */
615: if (!soqremque(so, 0))
616: return;
617: }
1.98 christos 618: if (so->so_rcv.sb_hiwat)
1.110 christos 619: (void)chgsbsize(so->so_uidinfo, &so->so_rcv.sb_hiwat, 0,
1.98 christos 620: RLIM_INFINITY);
621: if (so->so_snd.sb_hiwat)
1.110 christos 622: (void)chgsbsize(so->so_uidinfo, &so->so_snd.sb_hiwat, 0,
1.98 christos 623: RLIM_INFINITY);
624: sbrelease(&so->so_snd, so);
1.1 cgd 625: sorflush(so);
1.143 ad 626: seldestroy(&so->so_rcv.sb_sel);
627: seldestroy(&so->so_snd.sb_sel);
1.37 thorpej 628: pool_put(&socket_pool, so);
1.1 cgd 629: }
630:
631: /*
632: * Close a socket on last file table reference removal.
633: * Initiate disconnect if connected.
634: * Free socket when disconnect complete.
635: */
1.3 andrew 636: int
1.54 lukem 637: soclose(struct socket *so)
1.1 cgd 638: {
1.54 lukem 639: struct socket *so2;
640: int s, error;
1.1 cgd 641:
1.54 lukem 642: error = 0;
643: s = splsoftnet(); /* conservative */
1.1 cgd 644: if (so->so_options & SO_ACCEPTCONN) {
1.63 matt 645: while ((so2 = TAILQ_FIRST(&so->so_q0)) != 0) {
1.42 mycroft 646: (void) soqremque(so2, 0);
1.41 mycroft 647: (void) soabort(so2);
648: }
1.63 matt 649: while ((so2 = TAILQ_FIRST(&so->so_q)) != 0) {
1.42 mycroft 650: (void) soqremque(so2, 1);
1.41 mycroft 651: (void) soabort(so2);
652: }
1.1 cgd 653: }
654: if (so->so_pcb == 0)
655: goto discard;
656: if (so->so_state & SS_ISCONNECTED) {
657: if ((so->so_state & SS_ISDISCONNECTING) == 0) {
658: error = sodisconnect(so);
659: if (error)
660: goto drop;
661: }
662: if (so->so_options & SO_LINGER) {
1.144.4.4! mjf 663: if ((so->so_state & SS_ISDISCONNECTING) && so->so_nbio)
1.1 cgd 664: goto drop;
1.21 christos 665: while (so->so_state & SS_ISCONNECTED) {
1.134 christos 666: error = tsleep((void *)&so->so_timeo,
1.21 christos 667: PSOCK | PCATCH, netcls,
1.30 thorpej 668: so->so_linger * hz);
1.21 christos 669: if (error)
1.1 cgd 670: break;
1.21 christos 671: }
1.1 cgd 672: }
673: }
1.54 lukem 674: drop:
1.1 cgd 675: if (so->so_pcb) {
1.22 mycroft 676: int error2 = (*so->so_proto->pr_usrreq)(so, PRU_DETACH,
1.140 dyoung 677: NULL, NULL, NULL, NULL);
1.1 cgd 678: if (error == 0)
679: error = error2;
680: }
1.54 lukem 681: discard:
1.1 cgd 682: if (so->so_state & SS_NOFDREF)
683: panic("soclose: NOFDREF");
684: so->so_state |= SS_NOFDREF;
685: sofree(so);
686: splx(s);
687: return (error);
688: }
689:
690: /*
1.20 mycroft 691: * Must be called at splsoftnet...
1.1 cgd 692: */
1.3 andrew 693: int
1.54 lukem 694: soabort(struct socket *so)
1.1 cgd 695: {
1.139 yamt 696: int error;
1.1 cgd 697:
1.139 yamt 698: KASSERT(so->so_head == NULL);
1.140 dyoung 699: error = (*so->so_proto->pr_usrreq)(so, PRU_ABORT, NULL,
700: NULL, NULL, NULL);
1.139 yamt 701: if (error) {
702: sofree(so);
703: }
704: return error;
1.1 cgd 705: }
706:
1.3 andrew 707: int
1.54 lukem 708: soaccept(struct socket *so, struct mbuf *nam)
1.1 cgd 709: {
1.54 lukem 710: int s, error;
1.1 cgd 711:
1.54 lukem 712: error = 0;
713: s = splsoftnet();
1.1 cgd 714: if ((so->so_state & SS_NOFDREF) == 0)
715: panic("soaccept: !NOFDREF");
716: so->so_state &= ~SS_NOFDREF;
1.55 thorpej 717: if ((so->so_state & SS_ISDISCONNECTED) == 0 ||
718: (so->so_proto->pr_flags & PR_ABRTACPTDIS) == 0)
1.41 mycroft 719: error = (*so->so_proto->pr_usrreq)(so, PRU_ACCEPT,
1.140 dyoung 720: NULL, nam, NULL, NULL);
1.41 mycroft 721: else
1.53 itojun 722: error = ECONNABORTED;
1.52 itojun 723:
1.1 cgd 724: splx(s);
725: return (error);
726: }
727:
1.3 andrew 728: int
1.114 christos 729: soconnect(struct socket *so, struct mbuf *nam, struct lwp *l)
1.1 cgd 730: {
1.54 lukem 731: int s, error;
1.1 cgd 732:
733: if (so->so_options & SO_ACCEPTCONN)
734: return (EOPNOTSUPP);
1.20 mycroft 735: s = splsoftnet();
1.1 cgd 736: /*
737: * If protocol is connection-based, can only connect once.
738: * Otherwise, if connected, try to disconnect first.
739: * This allows user to disconnect by connecting to, e.g.,
740: * a null address.
741: */
742: if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) &&
743: ((so->so_proto->pr_flags & PR_CONNREQUIRED) ||
744: (error = sodisconnect(so))))
745: error = EISCONN;
746: else
747: error = (*so->so_proto->pr_usrreq)(so, PRU_CONNECT,
1.140 dyoung 748: NULL, nam, NULL, l);
1.1 cgd 749: splx(s);
750: return (error);
751: }
752:
1.3 andrew 753: int
1.54 lukem 754: soconnect2(struct socket *so1, struct socket *so2)
1.1 cgd 755: {
1.54 lukem 756: int s, error;
1.1 cgd 757:
1.54 lukem 758: s = splsoftnet();
1.22 mycroft 759: error = (*so1->so_proto->pr_usrreq)(so1, PRU_CONNECT2,
1.140 dyoung 760: NULL, (struct mbuf *)so2, NULL, NULL);
1.1 cgd 761: splx(s);
762: return (error);
763: }
764:
1.3 andrew 765: int
1.54 lukem 766: sodisconnect(struct socket *so)
1.1 cgd 767: {
1.54 lukem 768: int s, error;
1.1 cgd 769:
1.54 lukem 770: s = splsoftnet();
1.1 cgd 771: if ((so->so_state & SS_ISCONNECTED) == 0) {
772: error = ENOTCONN;
773: goto bad;
774: }
775: if (so->so_state & SS_ISDISCONNECTING) {
776: error = EALREADY;
777: goto bad;
778: }
1.22 mycroft 779: error = (*so->so_proto->pr_usrreq)(so, PRU_DISCONNECT,
1.140 dyoung 780: NULL, NULL, NULL, NULL);
1.54 lukem 781: bad:
1.1 cgd 782: splx(s);
1.117 yamt 783: sodopendfree();
1.1 cgd 784: return (error);
785: }
786:
1.15 mycroft 787: #define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
1.1 cgd 788: /*
789: * Send on a socket.
790: * If send must go all at once and message is larger than
791: * send buffering, then hard error.
792: * Lock against other senders.
793: * If must go all at once and not enough room now, then
794: * inform user that this would block and do nothing.
795: * Otherwise, if nonblocking, send as much as possible.
796: * The data to be sent is described by "uio" if nonzero,
797: * otherwise by the mbuf chain "top" (which must be null
798: * if uio is not). Data provided in mbuf chain must be small
799: * enough to send all at once.
800: *
801: * Returns nonzero on error, timeout or signal; callers
802: * must check for short counts if EINTR/ERESTART are returned.
803: * Data and control buffers are freed on return.
804: */
1.3 andrew 805: int
1.54 lukem 806: sosend(struct socket *so, struct mbuf *addr, struct uio *uio, struct mbuf *top,
1.114 christos 807: struct mbuf *control, int flags, struct lwp *l)
1.1 cgd 808: {
1.54 lukem 809: struct mbuf **mp, *m;
1.114 christos 810: struct proc *p;
1.58 jdolecek 811: long space, len, resid, clen, mlen;
812: int error, s, dontroute, atomic;
1.54 lukem 813:
1.114 christos 814: p = l->l_proc;
1.117 yamt 815: sodopendfree();
1.64 thorpej 816:
1.54 lukem 817: clen = 0;
818: atomic = sosendallatonce(so) || top;
1.1 cgd 819: if (uio)
820: resid = uio->uio_resid;
821: else
822: resid = top->m_pkthdr.len;
1.7 cgd 823: /*
824: * In theory resid should be unsigned.
825: * However, space must be signed, as it might be less than 0
826: * if we over-committed, and we must use a signed comparison
827: * of space and resid. On the other hand, a negative resid
828: * causes us to loop sending 0-length segments to the protocol.
829: */
1.29 mycroft 830: if (resid < 0) {
831: error = EINVAL;
832: goto out;
833: }
1.1 cgd 834: dontroute =
835: (flags & MSG_DONTROUTE) && (so->so_options & SO_DONTROUTE) == 0 &&
836: (so->so_proto->pr_flags & PR_ATOMIC);
1.102 jonathan 837: if (p)
838: p->p_stats->p_ru.ru_msgsnd++;
1.1 cgd 839: if (control)
840: clen = control->m_len;
841: #define snderr(errno) { error = errno; splx(s); goto release; }
842:
1.54 lukem 843: restart:
1.21 christos 844: if ((error = sblock(&so->so_snd, SBLOCKWAIT(flags))) != 0)
1.1 cgd 845: goto out;
846: do {
1.20 mycroft 847: s = splsoftnet();
1.1 cgd 848: if (so->so_state & SS_CANTSENDMORE)
849: snderr(EPIPE);
1.48 thorpej 850: if (so->so_error) {
851: error = so->so_error;
852: so->so_error = 0;
853: splx(s);
854: goto release;
855: }
1.1 cgd 856: if ((so->so_state & SS_ISCONNECTED) == 0) {
857: if (so->so_proto->pr_flags & PR_CONNREQUIRED) {
858: if ((so->so_state & SS_ISCONFIRMING) == 0 &&
859: !(resid == 0 && clen != 0))
860: snderr(ENOTCONN);
861: } else if (addr == 0)
862: snderr(EDESTADDRREQ);
863: }
864: space = sbspace(&so->so_snd);
865: if (flags & MSG_OOB)
866: space += 1024;
1.21 christos 867: if ((atomic && resid > so->so_snd.sb_hiwat) ||
1.11 mycroft 868: clen > so->so_snd.sb_hiwat)
869: snderr(EMSGSIZE);
1.96 mycroft 870: if (space < resid + clen &&
1.1 cgd 871: (atomic || space < so->so_snd.sb_lowat || space < clen)) {
1.144.4.4! mjf 872: if (so->so_nbio)
1.1 cgd 873: snderr(EWOULDBLOCK);
874: sbunlock(&so->so_snd);
875: error = sbwait(&so->so_snd);
876: splx(s);
877: if (error)
878: goto out;
879: goto restart;
880: }
881: splx(s);
882: mp = ⊤
883: space -= clen;
884: do {
1.45 tv 885: if (uio == NULL) {
886: /*
887: * Data is prepackaged in "top".
888: */
889: resid = 0;
890: if (flags & MSG_EOR)
891: top->m_flags |= M_EOR;
892: } else do {
1.144 dyoung 893: if (top == NULL) {
1.78 matt 894: m = m_gethdr(M_WAIT, MT_DATA);
1.45 tv 895: mlen = MHLEN;
896: m->m_pkthdr.len = 0;
1.140 dyoung 897: m->m_pkthdr.rcvif = NULL;
1.45 tv 898: } else {
1.78 matt 899: m = m_get(M_WAIT, MT_DATA);
1.45 tv 900: mlen = MLEN;
901: }
1.78 matt 902: MCLAIM(m, so->so_snd.sb_mowner);
1.121 yamt 903: if (sock_loan_thresh >= 0 &&
904: uio->uio_iov->iov_len >= sock_loan_thresh &&
905: space >= sock_loan_thresh &&
1.64 thorpej 906: (len = sosend_loan(so, uio, m,
907: space)) != 0) {
908: SOSEND_COUNTER_INCR(&sosend_loan_big);
909: space -= len;
910: goto have_data;
911: }
1.45 tv 912: if (resid >= MINCLSIZE && space >= MCLBYTES) {
1.64 thorpej 913: SOSEND_COUNTER_INCR(&sosend_copy_big);
1.78 matt 914: m_clget(m, M_WAIT);
1.45 tv 915: if ((m->m_flags & M_EXT) == 0)
916: goto nopages;
917: mlen = MCLBYTES;
918: if (atomic && top == 0) {
1.58 jdolecek 919: len = lmin(MCLBYTES - max_hdr,
1.54 lukem 920: resid);
1.45 tv 921: m->m_data += max_hdr;
922: } else
1.58 jdolecek 923: len = lmin(MCLBYTES, resid);
1.45 tv 924: space -= len;
925: } else {
1.64 thorpej 926: nopages:
927: SOSEND_COUNTER_INCR(&sosend_copy_small);
1.58 jdolecek 928: len = lmin(lmin(mlen, resid), space);
1.45 tv 929: space -= len;
930: /*
931: * For datagram protocols, leave room
932: * for protocol headers in first mbuf.
933: */
934: if (atomic && top == 0 && len < mlen)
935: MH_ALIGN(m, len);
936: }
1.144 dyoung 937: error = uiomove(mtod(m, void *), (int)len, uio);
1.64 thorpej 938: have_data:
1.45 tv 939: resid = uio->uio_resid;
940: m->m_len = len;
941: *mp = m;
942: top->m_pkthdr.len += len;
1.144 dyoung 943: if (error != 0)
1.45 tv 944: goto release;
945: mp = &m->m_next;
946: if (resid <= 0) {
947: if (flags & MSG_EOR)
948: top->m_flags |= M_EOR;
949: break;
950: }
951: } while (space > 0 && atomic);
1.108 perry 952:
1.46 sommerfe 953: s = splsoftnet();
954:
955: if (so->so_state & SS_CANTSENDMORE)
956: snderr(EPIPE);
1.45 tv 957:
958: if (dontroute)
959: so->so_options |= SO_DONTROUTE;
960: if (resid > 0)
961: so->so_state |= SS_MORETOCOME;
1.46 sommerfe 962: error = (*so->so_proto->pr_usrreq)(so,
963: (flags & MSG_OOB) ? PRU_SENDOOB : PRU_SEND,
1.114 christos 964: top, addr, control, curlwp); /* XXX */
1.45 tv 965: if (dontroute)
966: so->so_options &= ~SO_DONTROUTE;
967: if (resid > 0)
968: so->so_state &= ~SS_MORETOCOME;
1.46 sommerfe 969: splx(s);
970:
1.45 tv 971: clen = 0;
1.144 dyoung 972: control = NULL;
973: top = NULL;
1.45 tv 974: mp = ⊤
1.144 dyoung 975: if (error != 0)
1.1 cgd 976: goto release;
977: } while (resid && space > 0);
978: } while (resid);
979:
1.54 lukem 980: release:
1.1 cgd 981: sbunlock(&so->so_snd);
1.54 lukem 982: out:
1.1 cgd 983: if (top)
984: m_freem(top);
985: if (control)
986: m_freem(control);
987: return (error);
988: }
989:
990: /*
991: * Implement receive operations on a socket.
992: * We depend on the way that records are added to the sockbuf
993: * by sbappend*. In particular, each record (mbufs linked through m_next)
994: * must begin with an address if the protocol so specifies,
995: * followed by an optional mbuf or mbufs containing ancillary data,
996: * and then zero or more mbufs of data.
997: * In order to avoid blocking network interrupts for the entire time here,
998: * we splx() while doing the actual copy to user space.
999: * Although the sockbuf is locked, new data may still be appended,
1000: * and thus we must maintain consistency of the sockbuf during that time.
1001: *
1002: * The caller may receive the data as a single mbuf chain by supplying
1003: * an mbuf **mp0 for use in returning the chain. The uio is then used
1004: * only for the count in uio_resid.
1005: */
1.3 andrew 1006: int
1.54 lukem 1007: soreceive(struct socket *so, struct mbuf **paddr, struct uio *uio,
1008: struct mbuf **mp0, struct mbuf **controlp, int *flagsp)
1.1 cgd 1009: {
1.116 yamt 1010: struct lwp *l = curlwp;
1.54 lukem 1011: struct mbuf *m, **mp;
1.144.4.2 mjf 1012: int atomic, flags, len, error, s, offset, moff, type, orig_resid;
1.99 matt 1013: const struct protosw *pr;
1.54 lukem 1014: struct mbuf *nextrecord;
1.67 he 1015: int mbuf_removed = 0;
1.144.4.2 mjf 1016: const struct domain *dom;
1.64 thorpej 1017:
1.54 lukem 1018: pr = so->so_proto;
1.144.4.2 mjf 1019: atomic = pr->pr_flags & PR_ATOMIC;
1020: dom = pr->pr_domain;
1.1 cgd 1021: mp = mp0;
1.54 lukem 1022: type = 0;
1023: orig_resid = uio->uio_resid;
1.102 jonathan 1024:
1.144 dyoung 1025: if (paddr != NULL)
1026: *paddr = NULL;
1027: if (controlp != NULL)
1028: *controlp = NULL;
1029: if (flagsp != NULL)
1.1 cgd 1030: flags = *flagsp &~ MSG_EOR;
1031: else
1032: flags = 0;
1.66 enami 1033:
1034: if ((flags & MSG_DONTWAIT) == 0)
1.117 yamt 1035: sodopendfree();
1.66 enami 1036:
1.1 cgd 1037: if (flags & MSG_OOB) {
1038: m = m_get(M_WAIT, MT_DATA);
1.17 cgd 1039: error = (*pr->pr_usrreq)(so, PRU_RCVOOB, m,
1.140 dyoung 1040: (struct mbuf *)(long)(flags & MSG_PEEK), NULL, l);
1.1 cgd 1041: if (error)
1042: goto bad;
1043: do {
1.134 christos 1044: error = uiomove(mtod(m, void *),
1.1 cgd 1045: (int) min(uio->uio_resid, m->m_len), uio);
1046: m = m_free(m);
1.144 dyoung 1047: } while (uio->uio_resid > 0 && error == 0 && m);
1.54 lukem 1048: bad:
1.144 dyoung 1049: if (m != NULL)
1.1 cgd 1050: m_freem(m);
1.144 dyoung 1051: return error;
1.1 cgd 1052: }
1.144 dyoung 1053: if (mp != NULL)
1.140 dyoung 1054: *mp = NULL;
1.1 cgd 1055: if (so->so_state & SS_ISCONFIRMING && uio->uio_resid)
1.140 dyoung 1056: (*pr->pr_usrreq)(so, PRU_RCVD, NULL, NULL, NULL, l);
1.1 cgd 1057:
1.54 lukem 1058: restart:
1.21 christos 1059: if ((error = sblock(&so->so_rcv, SBLOCKWAIT(flags))) != 0)
1.144 dyoung 1060: return error;
1.20 mycroft 1061: s = splsoftnet();
1.1 cgd 1062:
1063: m = so->so_rcv.sb_mb;
1064: /*
1065: * If we have less data than requested, block awaiting more
1066: * (subject to any timeout) if:
1.15 mycroft 1067: * 1. the current count is less than the low water mark,
1.1 cgd 1068: * 2. MSG_WAITALL is set, and it is possible to do the entire
1.15 mycroft 1069: * receive operation at once if we block (resid <= hiwat), or
1070: * 3. MSG_DONTWAIT is not set.
1.1 cgd 1071: * If MSG_WAITALL is set but resid is larger than the receive buffer,
1072: * we have to do the receive in sections, and thus risk returning
1073: * a short count if a timeout or signal occurs after we start.
1074: */
1.144 dyoung 1075: if (m == NULL ||
1076: ((flags & MSG_DONTWAIT) == 0 &&
1077: so->so_rcv.sb_cc < uio->uio_resid &&
1078: (so->so_rcv.sb_cc < so->so_rcv.sb_lowat ||
1079: ((flags & MSG_WAITALL) &&
1080: uio->uio_resid <= so->so_rcv.sb_hiwat)) &&
1.144.4.2 mjf 1081: m->m_nextpkt == NULL && !atomic)) {
1.1 cgd 1082: #ifdef DIAGNOSTIC
1.144 dyoung 1083: if (m == NULL && so->so_rcv.sb_cc)
1.1 cgd 1084: panic("receive 1");
1085: #endif
1086: if (so->so_error) {
1.144 dyoung 1087: if (m != NULL)
1.15 mycroft 1088: goto dontblock;
1.1 cgd 1089: error = so->so_error;
1090: if ((flags & MSG_PEEK) == 0)
1091: so->so_error = 0;
1092: goto release;
1093: }
1094: if (so->so_state & SS_CANTRCVMORE) {
1.144 dyoung 1095: if (m != NULL)
1.15 mycroft 1096: goto dontblock;
1.1 cgd 1097: else
1098: goto release;
1099: }
1.144 dyoung 1100: for (; m != NULL; m = m->m_next)
1.1 cgd 1101: if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) {
1102: m = so->so_rcv.sb_mb;
1103: goto dontblock;
1104: }
1105: if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 &&
1106: (so->so_proto->pr_flags & PR_CONNREQUIRED)) {
1107: error = ENOTCONN;
1108: goto release;
1109: }
1110: if (uio->uio_resid == 0)
1111: goto release;
1.144.4.4! mjf 1112: if (so->so_nbio || (flags & MSG_DONTWAIT)) {
1.1 cgd 1113: error = EWOULDBLOCK;
1114: goto release;
1115: }
1.69 thorpej 1116: SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 1");
1117: SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 1");
1.1 cgd 1118: sbunlock(&so->so_rcv);
1119: error = sbwait(&so->so_rcv);
1120: splx(s);
1.144 dyoung 1121: if (error != 0)
1122: return error;
1.1 cgd 1123: goto restart;
1124: }
1.54 lukem 1125: dontblock:
1.69 thorpej 1126: /*
1127: * On entry here, m points to the first record of the socket buffer.
1128: * While we process the initial mbufs containing address and control
1129: * info, we save a copy of m->m_nextpkt into nextrecord.
1130: */
1.144 dyoung 1131: if (l != NULL)
1.114 christos 1132: l->l_proc->p_stats->p_ru.ru_msgrcv++;
1.69 thorpej 1133: KASSERT(m == so->so_rcv.sb_mb);
1134: SBLASTRECORDCHK(&so->so_rcv, "soreceive 1");
1135: SBLASTMBUFCHK(&so->so_rcv, "soreceive 1");
1.1 cgd 1136: nextrecord = m->m_nextpkt;
1137: if (pr->pr_flags & PR_ADDR) {
1138: #ifdef DIAGNOSTIC
1139: if (m->m_type != MT_SONAME)
1140: panic("receive 1a");
1141: #endif
1.3 andrew 1142: orig_resid = 0;
1.1 cgd 1143: if (flags & MSG_PEEK) {
1144: if (paddr)
1145: *paddr = m_copy(m, 0, m->m_len);
1146: m = m->m_next;
1147: } else {
1148: sbfree(&so->so_rcv, m);
1.67 he 1149: mbuf_removed = 1;
1.144 dyoung 1150: if (paddr != NULL) {
1.1 cgd 1151: *paddr = m;
1152: so->so_rcv.sb_mb = m->m_next;
1.144 dyoung 1153: m->m_next = NULL;
1.1 cgd 1154: m = so->so_rcv.sb_mb;
1155: } else {
1156: MFREE(m, so->so_rcv.sb_mb);
1157: m = so->so_rcv.sb_mb;
1158: }
1159: }
1160: }
1.144 dyoung 1161: while (m != NULL && m->m_type == MT_CONTROL && error == 0) {
1.1 cgd 1162: if (flags & MSG_PEEK) {
1.144 dyoung 1163: if (controlp != NULL)
1.1 cgd 1164: *controlp = m_copy(m, 0, m->m_len);
1165: m = m->m_next;
1166: } else {
1167: sbfree(&so->so_rcv, m);
1.67 he 1168: mbuf_removed = 1;
1.144 dyoung 1169: if (controlp != NULL) {
1.114 christos 1170: if (dom->dom_externalize && l &&
1.1 cgd 1171: mtod(m, struct cmsghdr *)->cmsg_type ==
1172: SCM_RIGHTS)
1.114 christos 1173: error = (*dom->dom_externalize)(m, l);
1.1 cgd 1174: *controlp = m;
1175: so->so_rcv.sb_mb = m->m_next;
1.144 dyoung 1176: m->m_next = NULL;
1.1 cgd 1177: m = so->so_rcv.sb_mb;
1178: } else {
1.106 itojun 1179: /*
1180: * Dispose of any SCM_RIGHTS message that went
1181: * through the read path rather than recv.
1182: */
1.144.4.2 mjf 1183: if (dom->dom_dispose &&
1.106 itojun 1184: mtod(m, struct cmsghdr *)->cmsg_type == SCM_RIGHTS)
1.144.4.2 mjf 1185: (*dom->dom_dispose)(m);
1.1 cgd 1186: MFREE(m, so->so_rcv.sb_mb);
1187: m = so->so_rcv.sb_mb;
1188: }
1189: }
1.144 dyoung 1190: if (controlp != NULL) {
1.3 andrew 1191: orig_resid = 0;
1.1 cgd 1192: controlp = &(*controlp)->m_next;
1.3 andrew 1193: }
1.1 cgd 1194: }
1.69 thorpej 1195:
1196: /*
1197: * If m is non-NULL, we have some data to read. From now on,
1198: * make sure to keep sb_lastrecord consistent when working on
1199: * the last packet on the chain (nextrecord == NULL) and we
1200: * change m->m_nextpkt.
1201: */
1.144 dyoung 1202: if (m != NULL) {
1.69 thorpej 1203: if ((flags & MSG_PEEK) == 0) {
1.1 cgd 1204: m->m_nextpkt = nextrecord;
1.69 thorpej 1205: /*
1206: * If nextrecord == NULL (this is a single chain),
1207: * then sb_lastrecord may not be valid here if m
1208: * was changed earlier.
1209: */
1210: if (nextrecord == NULL) {
1211: KASSERT(so->so_rcv.sb_mb == m);
1212: so->so_rcv.sb_lastrecord = m;
1213: }
1214: }
1.1 cgd 1215: type = m->m_type;
1216: if (type == MT_OOBDATA)
1217: flags |= MSG_OOB;
1.69 thorpej 1218: } else {
1219: if ((flags & MSG_PEEK) == 0) {
1220: KASSERT(so->so_rcv.sb_mb == m);
1221: so->so_rcv.sb_mb = nextrecord;
1.70 thorpej 1222: SB_EMPTY_FIXUP(&so->so_rcv);
1.69 thorpej 1223: }
1.1 cgd 1224: }
1.69 thorpej 1225: SBLASTRECORDCHK(&so->so_rcv, "soreceive 2");
1226: SBLASTMBUFCHK(&so->so_rcv, "soreceive 2");
1227:
1.1 cgd 1228: moff = 0;
1229: offset = 0;
1.144 dyoung 1230: while (m != NULL && uio->uio_resid > 0 && error == 0) {
1.1 cgd 1231: if (m->m_type == MT_OOBDATA) {
1232: if (type != MT_OOBDATA)
1233: break;
1234: } else if (type == MT_OOBDATA)
1235: break;
1236: #ifdef DIAGNOSTIC
1237: else if (m->m_type != MT_DATA && m->m_type != MT_HEADER)
1238: panic("receive 3");
1239: #endif
1240: so->so_state &= ~SS_RCVATMARK;
1241: len = uio->uio_resid;
1242: if (so->so_oobmark && len > so->so_oobmark - offset)
1243: len = so->so_oobmark - offset;
1244: if (len > m->m_len - moff)
1245: len = m->m_len - moff;
1246: /*
1247: * If mp is set, just pass back the mbufs.
1248: * Otherwise copy them out via the uio, then free.
1249: * Sockbuf must be consistent here (points to current mbuf,
1250: * it points to next record) when we drop priority;
1251: * we must note any additions to the sockbuf when we
1252: * block interrupts again.
1253: */
1.144 dyoung 1254: if (mp == NULL) {
1.69 thorpej 1255: SBLASTRECORDCHK(&so->so_rcv, "soreceive uiomove");
1256: SBLASTMBUFCHK(&so->so_rcv, "soreceive uiomove");
1.1 cgd 1257: splx(s);
1.134 christos 1258: error = uiomove(mtod(m, char *) + moff, (int)len, uio);
1.20 mycroft 1259: s = splsoftnet();
1.144 dyoung 1260: if (error != 0) {
1.67 he 1261: /*
1262: * If any part of the record has been removed
1263: * (such as the MT_SONAME mbuf, which will
1264: * happen when PR_ADDR, and thus also
1265: * PR_ATOMIC, is set), then drop the entire
1266: * record to maintain the atomicity of the
1267: * receive operation.
1268: *
1269: * This avoids a later panic("receive 1a")
1270: * when compiled with DIAGNOSTIC.
1271: */
1.144.4.2 mjf 1272: if (m && mbuf_removed && atomic)
1.67 he 1273: (void) sbdroprecord(&so->so_rcv);
1274:
1.57 jdolecek 1275: goto release;
1.67 he 1276: }
1.1 cgd 1277: } else
1278: uio->uio_resid -= len;
1279: if (len == m->m_len - moff) {
1280: if (m->m_flags & M_EOR)
1281: flags |= MSG_EOR;
1282: if (flags & MSG_PEEK) {
1283: m = m->m_next;
1284: moff = 0;
1285: } else {
1286: nextrecord = m->m_nextpkt;
1287: sbfree(&so->so_rcv, m);
1288: if (mp) {
1289: *mp = m;
1290: mp = &m->m_next;
1291: so->so_rcv.sb_mb = m = m->m_next;
1.140 dyoung 1292: *mp = NULL;
1.1 cgd 1293: } else {
1294: MFREE(m, so->so_rcv.sb_mb);
1295: m = so->so_rcv.sb_mb;
1296: }
1.69 thorpej 1297: /*
1298: * If m != NULL, we also know that
1299: * so->so_rcv.sb_mb != NULL.
1300: */
1301: KASSERT(so->so_rcv.sb_mb == m);
1302: if (m) {
1.1 cgd 1303: m->m_nextpkt = nextrecord;
1.69 thorpej 1304: if (nextrecord == NULL)
1305: so->so_rcv.sb_lastrecord = m;
1306: } else {
1307: so->so_rcv.sb_mb = nextrecord;
1.70 thorpej 1308: SB_EMPTY_FIXUP(&so->so_rcv);
1.69 thorpej 1309: }
1310: SBLASTRECORDCHK(&so->so_rcv, "soreceive 3");
1311: SBLASTMBUFCHK(&so->so_rcv, "soreceive 3");
1.1 cgd 1312: }
1.144 dyoung 1313: } else if (flags & MSG_PEEK)
1314: moff += len;
1315: else {
1316: if (mp != NULL)
1317: *mp = m_copym(m, 0, len, M_WAIT);
1318: m->m_data += len;
1319: m->m_len -= len;
1320: so->so_rcv.sb_cc -= len;
1.1 cgd 1321: }
1322: if (so->so_oobmark) {
1323: if ((flags & MSG_PEEK) == 0) {
1324: so->so_oobmark -= len;
1325: if (so->so_oobmark == 0) {
1326: so->so_state |= SS_RCVATMARK;
1327: break;
1328: }
1.7 cgd 1329: } else {
1.1 cgd 1330: offset += len;
1.7 cgd 1331: if (offset == so->so_oobmark)
1332: break;
1333: }
1.1 cgd 1334: }
1335: if (flags & MSG_EOR)
1336: break;
1337: /*
1338: * If the MSG_WAITALL flag is set (for non-atomic socket),
1339: * we must not quit until "uio->uio_resid == 0" or an error
1340: * termination. If a signal/timeout occurs, return
1341: * with a short count but without error.
1342: * Keep sockbuf locked against other readers.
1343: */
1.144 dyoung 1344: while (flags & MSG_WAITALL && m == NULL && uio->uio_resid > 0 &&
1.3 andrew 1345: !sosendallatonce(so) && !nextrecord) {
1.1 cgd 1346: if (so->so_error || so->so_state & SS_CANTRCVMORE)
1347: break;
1.68 matt 1348: /*
1349: * If we are peeking and the socket receive buffer is
1350: * full, stop since we can't get more data to peek at.
1351: */
1352: if ((flags & MSG_PEEK) && sbspace(&so->so_rcv) <= 0)
1353: break;
1354: /*
1355: * If we've drained the socket buffer, tell the
1356: * protocol in case it needs to do something to
1357: * get it filled again.
1358: */
1359: if ((pr->pr_flags & PR_WANTRCVD) && so->so_pcb)
1360: (*pr->pr_usrreq)(so, PRU_RCVD,
1.140 dyoung 1361: NULL, (struct mbuf *)(long)flags, NULL, l);
1.69 thorpej 1362: SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 2");
1363: SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 2");
1.1 cgd 1364: error = sbwait(&so->so_rcv);
1.144 dyoung 1365: if (error != 0) {
1.1 cgd 1366: sbunlock(&so->so_rcv);
1367: splx(s);
1.144 dyoung 1368: return 0;
1.1 cgd 1369: }
1.21 christos 1370: if ((m = so->so_rcv.sb_mb) != NULL)
1.1 cgd 1371: nextrecord = m->m_nextpkt;
1372: }
1373: }
1.3 andrew 1374:
1.144.4.2 mjf 1375: if (m && atomic) {
1.3 andrew 1376: flags |= MSG_TRUNC;
1377: if ((flags & MSG_PEEK) == 0)
1378: (void) sbdroprecord(&so->so_rcv);
1379: }
1.1 cgd 1380: if ((flags & MSG_PEEK) == 0) {
1.144 dyoung 1381: if (m == NULL) {
1.69 thorpej 1382: /*
1.70 thorpej 1383: * First part is an inline SB_EMPTY_FIXUP(). Second
1.69 thorpej 1384: * part makes sure sb_lastrecord is up-to-date if
1385: * there is still data in the socket buffer.
1386: */
1.1 cgd 1387: so->so_rcv.sb_mb = nextrecord;
1.69 thorpej 1388: if (so->so_rcv.sb_mb == NULL) {
1389: so->so_rcv.sb_mbtail = NULL;
1390: so->so_rcv.sb_lastrecord = NULL;
1391: } else if (nextrecord->m_nextpkt == NULL)
1392: so->so_rcv.sb_lastrecord = nextrecord;
1393: }
1394: SBLASTRECORDCHK(&so->so_rcv, "soreceive 4");
1395: SBLASTMBUFCHK(&so->so_rcv, "soreceive 4");
1.1 cgd 1396: if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
1.140 dyoung 1397: (*pr->pr_usrreq)(so, PRU_RCVD, NULL,
1398: (struct mbuf *)(long)flags, NULL, l);
1.1 cgd 1399: }
1.3 andrew 1400: if (orig_resid == uio->uio_resid && orig_resid &&
1401: (flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) {
1402: sbunlock(&so->so_rcv);
1403: splx(s);
1404: goto restart;
1405: }
1.108 perry 1406:
1.144 dyoung 1407: if (flagsp != NULL)
1.1 cgd 1408: *flagsp |= flags;
1.54 lukem 1409: release:
1.1 cgd 1410: sbunlock(&so->so_rcv);
1411: splx(s);
1.144 dyoung 1412: return error;
1.1 cgd 1413: }
1414:
1.14 mycroft 1415: int
1.54 lukem 1416: soshutdown(struct socket *so, int how)
1.1 cgd 1417: {
1.99 matt 1418: const struct protosw *pr;
1.34 kleink 1419:
1.54 lukem 1420: pr = so->so_proto;
1.34 kleink 1421: if (!(how == SHUT_RD || how == SHUT_WR || how == SHUT_RDWR))
1422: return (EINVAL);
1.1 cgd 1423:
1.34 kleink 1424: if (how == SHUT_RD || how == SHUT_RDWR)
1.1 cgd 1425: sorflush(so);
1.34 kleink 1426: if (how == SHUT_WR || how == SHUT_RDWR)
1.140 dyoung 1427: return (*pr->pr_usrreq)(so, PRU_SHUTDOWN, NULL,
1428: NULL, NULL, NULL);
1.144 dyoung 1429: return 0;
1.1 cgd 1430: }
1431:
1.14 mycroft 1432: void
1.54 lukem 1433: sorflush(struct socket *so)
1.1 cgd 1434: {
1.54 lukem 1435: struct sockbuf *sb, asb;
1.99 matt 1436: const struct protosw *pr;
1.54 lukem 1437: int s;
1.1 cgd 1438:
1.54 lukem 1439: sb = &so->so_rcv;
1440: pr = so->so_proto;
1.1 cgd 1441: sb->sb_flags |= SB_NOINTR;
1.15 mycroft 1442: (void) sblock(sb, M_WAITOK);
1.56 thorpej 1443: s = splnet();
1.1 cgd 1444: socantrcvmore(so);
1445: sbunlock(sb);
1446: asb = *sb;
1.86 wrstuden 1447: /*
1448: * Clear most of the sockbuf structure, but leave some of the
1449: * fields valid.
1450: */
1451: memset(&sb->sb_startzero, 0,
1452: sizeof(*sb) - offsetof(struct sockbuf, sb_startzero));
1.1 cgd 1453: splx(s);
1454: if (pr->pr_flags & PR_RIGHTS && pr->pr_domain->dom_dispose)
1455: (*pr->pr_domain->dom_dispose)(asb.sb_mb);
1.98 christos 1456: sbrelease(&asb, so);
1.1 cgd 1457: }
1458:
1.142 dyoung 1459: static int
1460: sosetopt1(struct socket *so, int level, int optname, struct mbuf *m)
1.1 cgd 1461: {
1.142 dyoung 1462: int optval, val;
1.130 christos 1463: struct linger *l;
1.141 yamt 1464: struct sockbuf *sb;
1.142 dyoung 1465: struct timeval *tv;
1466:
1467: switch (optname) {
1468:
1469: case SO_LINGER:
1470: if (m == NULL || m->m_len != sizeof(struct linger))
1471: return EINVAL;
1472: l = mtod(m, struct linger *);
1473: if (l->l_linger < 0 || l->l_linger > USHRT_MAX ||
1474: l->l_linger > (INT_MAX / hz))
1475: return EDOM;
1476: so->so_linger = l->l_linger;
1477: if (l->l_onoff)
1478: so->so_options |= SO_LINGER;
1479: else
1480: so->so_options &= ~SO_LINGER;
1481: break;
1.1 cgd 1482:
1.142 dyoung 1483: case SO_DEBUG:
1484: case SO_KEEPALIVE:
1485: case SO_DONTROUTE:
1486: case SO_USELOOPBACK:
1487: case SO_BROADCAST:
1488: case SO_REUSEADDR:
1489: case SO_REUSEPORT:
1490: case SO_OOBINLINE:
1491: case SO_TIMESTAMP:
1492: if (m == NULL || m->m_len < sizeof(int))
1493: return EINVAL;
1494: if (*mtod(m, int *))
1495: so->so_options |= optname;
1496: else
1497: so->so_options &= ~optname;
1498: break;
1499:
1500: case SO_SNDBUF:
1501: case SO_RCVBUF:
1502: case SO_SNDLOWAT:
1503: case SO_RCVLOWAT:
1504: if (m == NULL || m->m_len < sizeof(int))
1505: return EINVAL;
1.1 cgd 1506:
1.142 dyoung 1507: /*
1508: * Values < 1 make no sense for any of these
1509: * options, so disallow them.
1510: */
1511: optval = *mtod(m, int *);
1512: if (optval < 1)
1513: return EINVAL;
1.1 cgd 1514:
1.142 dyoung 1515: switch (optname) {
1.1 cgd 1516:
1517: case SO_SNDBUF:
1518: case SO_RCVBUF:
1.142 dyoung 1519: sb = (optname == SO_SNDBUF) ?
1520: &so->so_snd : &so->so_rcv;
1521: if (sbreserve(sb, (u_long)optval, so) == 0)
1522: return ENOBUFS;
1523: sb->sb_flags &= ~SB_AUTOSIZE;
1524: break;
1525:
1526: /*
1527: * Make sure the low-water is never greater than
1528: * the high-water.
1529: */
1.1 cgd 1530: case SO_SNDLOWAT:
1.142 dyoung 1531: so->so_snd.sb_lowat =
1532: (optval > so->so_snd.sb_hiwat) ?
1533: so->so_snd.sb_hiwat : optval;
1534: break;
1.1 cgd 1535: case SO_RCVLOWAT:
1.142 dyoung 1536: so->so_rcv.sb_lowat =
1537: (optval > so->so_rcv.sb_hiwat) ?
1538: so->so_rcv.sb_hiwat : optval;
1539: break;
1540: }
1541: break;
1.28 thorpej 1542:
1.142 dyoung 1543: case SO_SNDTIMEO:
1544: case SO_RCVTIMEO:
1545: if (m == NULL || m->m_len < sizeof(*tv))
1546: return EINVAL;
1547: tv = mtod(m, struct timeval *);
1548: if (tv->tv_sec > (INT_MAX - tv->tv_usec / tick) / hz)
1549: return EDOM;
1550: val = tv->tv_sec * hz + tv->tv_usec / tick;
1551: if (val == 0 && tv->tv_usec != 0)
1552: val = 1;
1.28 thorpej 1553:
1.142 dyoung 1554: switch (optname) {
1.28 thorpej 1555:
1.142 dyoung 1556: case SO_SNDTIMEO:
1557: so->so_snd.sb_timeo = val;
1.1 cgd 1558: break;
1559: case SO_RCVTIMEO:
1.142 dyoung 1560: so->so_rcv.sb_timeo = val;
1561: break;
1562: }
1563: break;
1.1 cgd 1564:
1.142 dyoung 1565: default:
1566: return ENOPROTOOPT;
1567: }
1568: return 0;
1569: }
1.1 cgd 1570:
1.142 dyoung 1571: int
1572: sosetopt(struct socket *so, int level, int optname, struct mbuf *m)
1573: {
1574: int error, prerr;
1.1 cgd 1575:
1.142 dyoung 1576: if (level == SOL_SOCKET)
1577: error = sosetopt1(so, level, optname, m);
1578: else
1579: error = ENOPROTOOPT;
1.1 cgd 1580:
1.142 dyoung 1581: if ((error == 0 || error == ENOPROTOOPT) &&
1582: so->so_proto != NULL && so->so_proto->pr_ctloutput != NULL) {
1583: /* give the protocol stack a shot */
1584: prerr = (*so->so_proto->pr_ctloutput)(PRCO_SETOPT, so, level,
1585: optname, &m);
1586: if (prerr == 0)
1587: error = 0;
1588: else if (prerr != ENOPROTOOPT)
1589: error = prerr;
1590: } else if (m != NULL)
1591: (void)m_free(m);
1592: return error;
1.1 cgd 1593: }
1594:
1.14 mycroft 1595: int
1.54 lukem 1596: sogetopt(struct socket *so, int level, int optname, struct mbuf **mp)
1.1 cgd 1597: {
1.54 lukem 1598: struct mbuf *m;
1.1 cgd 1599:
1600: if (level != SOL_SOCKET) {
1601: if (so->so_proto && so->so_proto->pr_ctloutput) {
1602: return ((*so->so_proto->pr_ctloutput)
1603: (PRCO_GETOPT, so, level, optname, mp));
1604: } else
1605: return (ENOPROTOOPT);
1606: } else {
1607: m = m_get(M_WAIT, MT_SOOPTS);
1.36 perry 1608: m->m_len = sizeof(int);
1.1 cgd 1609:
1610: switch (optname) {
1611:
1612: case SO_LINGER:
1.36 perry 1613: m->m_len = sizeof(struct linger);
1.1 cgd 1614: mtod(m, struct linger *)->l_onoff =
1.131 christos 1615: (so->so_options & SO_LINGER) ? 1 : 0;
1.1 cgd 1616: mtod(m, struct linger *)->l_linger = so->so_linger;
1617: break;
1618:
1619: case SO_USELOOPBACK:
1620: case SO_DONTROUTE:
1621: case SO_DEBUG:
1622: case SO_KEEPALIVE:
1623: case SO_REUSEADDR:
1.15 mycroft 1624: case SO_REUSEPORT:
1.1 cgd 1625: case SO_BROADCAST:
1626: case SO_OOBINLINE:
1.26 thorpej 1627: case SO_TIMESTAMP:
1.131 christos 1628: *mtod(m, int *) = (so->so_options & optname) ? 1 : 0;
1.1 cgd 1629: break;
1630:
1631: case SO_TYPE:
1632: *mtod(m, int *) = so->so_type;
1633: break;
1634:
1635: case SO_ERROR:
1636: *mtod(m, int *) = so->so_error;
1637: so->so_error = 0;
1638: break;
1639:
1640: case SO_SNDBUF:
1641: *mtod(m, int *) = so->so_snd.sb_hiwat;
1642: break;
1643:
1644: case SO_RCVBUF:
1645: *mtod(m, int *) = so->so_rcv.sb_hiwat;
1646: break;
1647:
1648: case SO_SNDLOWAT:
1649: *mtod(m, int *) = so->so_snd.sb_lowat;
1650: break;
1651:
1652: case SO_RCVLOWAT:
1653: *mtod(m, int *) = so->so_rcv.sb_lowat;
1654: break;
1655:
1656: case SO_SNDTIMEO:
1657: case SO_RCVTIMEO:
1658: {
1659: int val = (optname == SO_SNDTIMEO ?
1660: so->so_snd.sb_timeo : so->so_rcv.sb_timeo);
1661:
1662: m->m_len = sizeof(struct timeval);
1663: mtod(m, struct timeval *)->tv_sec = val / hz;
1664: mtod(m, struct timeval *)->tv_usec =
1.27 kleink 1665: (val % hz) * tick;
1.1 cgd 1666: break;
1667: }
1668:
1.107 darrenr 1669: case SO_OVERFLOWED:
1670: *mtod(m, int *) = so->so_rcv.sb_overflowed;
1671: break;
1672:
1.1 cgd 1673: default:
1674: (void)m_free(m);
1675: return (ENOPROTOOPT);
1676: }
1677: *mp = m;
1678: return (0);
1679: }
1680: }
1681:
1.14 mycroft 1682: void
1.54 lukem 1683: sohasoutofband(struct socket *so)
1.1 cgd 1684: {
1.90 christos 1685: fownsignal(so->so_pgid, SIGURG, POLL_PRI, POLLPRI|POLLRDBAND, so);
1.2 cgd 1686: selwakeup(&so->so_rcv.sb_sel);
1.1 cgd 1687: }
1.72 jdolecek 1688:
1689: static void
1690: filt_sordetach(struct knote *kn)
1691: {
1692: struct socket *so;
1693:
1694: so = (struct socket *)kn->kn_fp->f_data;
1.73 christos 1695: SLIST_REMOVE(&so->so_rcv.sb_sel.sel_klist, kn, knote, kn_selnext);
1696: if (SLIST_EMPTY(&so->so_rcv.sb_sel.sel_klist))
1.72 jdolecek 1697: so->so_rcv.sb_flags &= ~SB_KNOTE;
1698: }
1699:
1700: /*ARGSUSED*/
1701: static int
1.129 yamt 1702: filt_soread(struct knote *kn, long hint)
1.72 jdolecek 1703: {
1704: struct socket *so;
1705:
1706: so = (struct socket *)kn->kn_fp->f_data;
1707: kn->kn_data = so->so_rcv.sb_cc;
1708: if (so->so_state & SS_CANTRCVMORE) {
1.108 perry 1709: kn->kn_flags |= EV_EOF;
1.72 jdolecek 1710: kn->kn_fflags = so->so_error;
1711: return (1);
1712: }
1713: if (so->so_error) /* temporary udp error */
1714: return (1);
1715: if (kn->kn_sfflags & NOTE_LOWAT)
1716: return (kn->kn_data >= kn->kn_sdata);
1717: return (kn->kn_data >= so->so_rcv.sb_lowat);
1718: }
1719:
1720: static void
1721: filt_sowdetach(struct knote *kn)
1722: {
1723: struct socket *so;
1724:
1725: so = (struct socket *)kn->kn_fp->f_data;
1.73 christos 1726: SLIST_REMOVE(&so->so_snd.sb_sel.sel_klist, kn, knote, kn_selnext);
1727: if (SLIST_EMPTY(&so->so_snd.sb_sel.sel_klist))
1.72 jdolecek 1728: so->so_snd.sb_flags &= ~SB_KNOTE;
1729: }
1730:
1731: /*ARGSUSED*/
1732: static int
1.129 yamt 1733: filt_sowrite(struct knote *kn, long hint)
1.72 jdolecek 1734: {
1735: struct socket *so;
1736:
1737: so = (struct socket *)kn->kn_fp->f_data;
1738: kn->kn_data = sbspace(&so->so_snd);
1739: if (so->so_state & SS_CANTSENDMORE) {
1.108 perry 1740: kn->kn_flags |= EV_EOF;
1.72 jdolecek 1741: kn->kn_fflags = so->so_error;
1742: return (1);
1743: }
1744: if (so->so_error) /* temporary udp error */
1745: return (1);
1746: if (((so->so_state & SS_ISCONNECTED) == 0) &&
1747: (so->so_proto->pr_flags & PR_CONNREQUIRED))
1748: return (0);
1749: if (kn->kn_sfflags & NOTE_LOWAT)
1750: return (kn->kn_data >= kn->kn_sdata);
1751: return (kn->kn_data >= so->so_snd.sb_lowat);
1752: }
1753:
1754: /*ARGSUSED*/
1755: static int
1.129 yamt 1756: filt_solisten(struct knote *kn, long hint)
1.72 jdolecek 1757: {
1758: struct socket *so;
1759:
1760: so = (struct socket *)kn->kn_fp->f_data;
1761:
1762: /*
1763: * Set kn_data to number of incoming connections, not
1764: * counting partial (incomplete) connections.
1.108 perry 1765: */
1.72 jdolecek 1766: kn->kn_data = so->so_qlen;
1767: return (kn->kn_data > 0);
1768: }
1769:
1770: static const struct filterops solisten_filtops =
1771: { 1, NULL, filt_sordetach, filt_solisten };
1772: static const struct filterops soread_filtops =
1773: { 1, NULL, filt_sordetach, filt_soread };
1774: static const struct filterops sowrite_filtops =
1775: { 1, NULL, filt_sowdetach, filt_sowrite };
1776:
1777: int
1.129 yamt 1778: soo_kqfilter(struct file *fp, struct knote *kn)
1.72 jdolecek 1779: {
1780: struct socket *so;
1781: struct sockbuf *sb;
1782:
1783: so = (struct socket *)kn->kn_fp->f_data;
1784: switch (kn->kn_filter) {
1785: case EVFILT_READ:
1786: if (so->so_options & SO_ACCEPTCONN)
1787: kn->kn_fop = &solisten_filtops;
1788: else
1789: kn->kn_fop = &soread_filtops;
1790: sb = &so->so_rcv;
1791: break;
1792: case EVFILT_WRITE:
1793: kn->kn_fop = &sowrite_filtops;
1794: sb = &so->so_snd;
1795: break;
1796: default:
1.144.4.2 mjf 1797: return (EINVAL);
1.72 jdolecek 1798: }
1.73 christos 1799: SLIST_INSERT_HEAD(&sb->sb_sel.sel_klist, kn, kn_selnext);
1.72 jdolecek 1800: sb->sb_flags |= SB_KNOTE;
1801: return (0);
1802: }
1803:
1.94 yamt 1804: #include <sys/sysctl.h>
1805:
1806: static int sysctl_kern_somaxkva(SYSCTLFN_PROTO);
1807:
1808: /*
1809: * sysctl helper routine for kern.somaxkva. ensures that the given
1810: * value is not too small.
1811: * (XXX should we maybe make sure it's not too large as well?)
1812: */
1813: static int
1814: sysctl_kern_somaxkva(SYSCTLFN_ARGS)
1815: {
1816: int error, new_somaxkva;
1817: struct sysctlnode node;
1818:
1819: new_somaxkva = somaxkva;
1820: node = *rnode;
1821: node.sysctl_data = &new_somaxkva;
1822: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1823: if (error || newp == NULL)
1824: return (error);
1825:
1826: if (new_somaxkva < (16 * 1024 * 1024)) /* sanity */
1827: return (EINVAL);
1828:
1.136 ad 1829: mutex_enter(&so_pendfree_lock);
1.94 yamt 1830: somaxkva = new_somaxkva;
1.136 ad 1831: cv_broadcast(&socurkva_cv);
1832: mutex_exit(&so_pendfree_lock);
1.94 yamt 1833:
1834: return (error);
1835: }
1836:
1837: SYSCTL_SETUP(sysctl_kern_somaxkva_setup, "sysctl kern.somaxkva setup")
1838: {
1839:
1.97 atatat 1840: sysctl_createv(clog, 0, NULL, NULL,
1841: CTLFLAG_PERMANENT,
1842: CTLTYPE_NODE, "kern", NULL,
1843: NULL, 0, NULL, 0,
1844: CTL_KERN, CTL_EOL);
1845:
1846: sysctl_createv(clog, 0, NULL, NULL,
1847: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.103 atatat 1848: CTLTYPE_INT, "somaxkva",
1849: SYSCTL_DESCR("Maximum amount of kernel memory to be "
1850: "used for socket buffers"),
1.94 yamt 1851: sysctl_kern_somaxkva, 0, NULL, 0,
1852: CTL_KERN, KERN_SOMAXKVA, CTL_EOL);
1853: }
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