Annotation of src/sys/kern/uipc_socket.c, Revision 1.111.2.9
1.111.2.9! yamt 1: /* $NetBSD: uipc_socket.c,v 1.111.2.8 2007/10/27 11:35:38 yamt Exp $ */
1.64 thorpej 2:
3: /*-
1.111.2.7 yamt 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>
1.111.2.9! yamt 71: __KERNEL_RCSID(0, "$NetBSD: uipc_socket.c,v 1.111.2.8 2007/10/27 11:35:38 yamt 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>
1.111.2.8 yamt 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>
1.111.2.3 yamt 95: #include <sys/kauth.h>
1.111.2.7 yamt 96: #include <sys/mutex.h>
97: #include <sys/condvar.h>
1.37 thorpej 98:
1.64 thorpej 99: #include <uvm/uvm.h>
100:
1.111.2.7 yamt 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:
1.111.2.8 yamt 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:
1.111.2.3 yamt 115: static struct evcnt sosend_loan_big = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
1.64 thorpej 116: NULL, "sosend", "loan big");
1.111.2.3 yamt 117: static struct evcnt sosend_copy_big = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
1.64 thorpej 118: NULL, "sosend", "copy big");
1.111.2.3 yamt 119: static struct evcnt sosend_copy_small = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
1.64 thorpej 120: NULL, "sosend", "copy small");
1.111.2.3 yamt 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:
1.111.2.3 yamt 136: static struct callback_entry sokva_reclaimerentry;
1.1 cgd 137:
1.71 thorpej 138: #ifdef SOSEND_NO_LOAN
1.111.2.3 yamt 139: int sock_loan_thresh = -1;
1.71 thorpej 140: #else
1.111.2.3 yamt 141: int sock_loan_thresh = 4096;
1.65 thorpej 142: #endif
1.64 thorpej 143:
1.111.2.7 yamt 144: static kmutex_t so_pendfree_lock;
1.111.2.3 yamt 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;
1.111.2.3 yamt 151: static int socurkva;
1.111.2.7 yamt 152: static kcondvar_t socurkva_cv;
1.64 thorpej 153:
154: #define SOCK_LOAN_CHUNK 65536
155:
1.111.2.3 yamt 156: static size_t sodopendfree(void);
157: static size_t sodopendfreel(void);
1.93 yamt 158:
1.111.2.3 yamt 159: static vsize_t
1.95 yamt 160: sokvareserve(struct socket *so, vsize_t len)
1.80 yamt 161: {
1.98 christos 162: int error;
1.80 yamt 163:
1.111.2.7 yamt 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:
1.111.2.3 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);
1.111.2.7 yamt 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;
1.111.2.7 yamt 189: mutex_exit(&so_pendfree_lock);
1.98 christos 190: return len;
1.95 yamt 191: }
192:
1.111.2.3 yamt 193: static void
1.95 yamt 194: sokvaunreserve(vsize_t len)
195: {
196:
1.111.2.7 yamt 197: mutex_enter(&so_pendfree_lock);
1.95 yamt 198: socurkva -= len;
1.111.2.7 yamt 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
1.111.2.7 yamt 254: sodoloanfree(struct vm_page **pgs, void *buf, size_t size, bool mapped)
1.64 thorpej 255: {
1.111.2.1 yamt 256: vaddr_t sva, eva;
1.64 thorpej 257: vsize_t len;
1.111.2.1 yamt 258: int npgs;
259:
260: KASSERT(pgs != NULL);
1.64 thorpej 261:
262: eva = round_page((vaddr_t) buf + size);
263: sva = trunc_page((vaddr_t) buf);
264: len = eva - sva;
265: npgs = len >> PAGE_SHIFT;
266:
1.111.2.1 yamt 267: if (mapped) {
268: pmap_kremove(sva, len);
269: pmap_update(pmap_kernel());
1.64 thorpej 270: }
271: uvm_unloan(pgs, npgs, UVM_LOAN_TOPAGE);
1.80 yamt 272: sokvafree(sva, len);
1.64 thorpej 273: }
274:
275: static size_t
1.111.2.3 yamt 276: sodopendfree()
1.64 thorpej 277: {
1.93 yamt 278: size_t rv;
1.64 thorpej 279:
1.111.2.7 yamt 280: mutex_enter(&so_pendfree_lock);
1.111.2.3 yamt 281: rv = sodopendfreel();
1.111.2.7 yamt 282: mutex_exit(&so_pendfree_lock);
1.93 yamt 283:
284: return rv;
285: }
286:
287: /*
288: * sodopendfreel: free mbufs on "pendfree" list.
1.111.2.7 yamt 289: * unlock and relock so_pendfree_lock when freeing mbufs.
1.93 yamt 290: *
1.111.2.7 yamt 291: * => called with so_pendfree_lock held.
1.93 yamt 292: */
293:
294: static size_t
1.111.2.3 yamt 295: sodopendfreel()
1.93 yamt 296: {
1.111.2.7 yamt 297: struct mbuf *m, *next;
1.93 yamt 298: size_t rv = 0;
299:
1.111.2.7 yamt 300: KASSERT(mutex_owned(&so_pendfree_lock));
1.93 yamt 301:
1.111.2.7 yamt 302: while (so_pendfree != NULL) {
1.64 thorpej 303: m = so_pendfree;
1.93 yamt 304: so_pendfree = NULL;
1.111.2.7 yamt 305: mutex_exit(&so_pendfree_lock);
1.93 yamt 306:
307: for (; m != NULL; m = next) {
308: next = m->m_next;
1.111.2.1 yamt 309: KASSERT((~m->m_flags & (M_EXT|M_EXT_PAGES)) == 0);
1.111.2.4 yamt 310: KASSERT(m->m_ext.ext_refcnt == 0);
1.93 yamt 311:
312: rv += m->m_ext.ext_size;
1.111.2.1 yamt 313: sodoloanfree(m->m_ext.ext_pgs, m->m_ext.ext_buf,
314: m->m_ext.ext_size,
315: (m->m_ext.ext_flags & M_EXT_LAZY) == 0);
1.111.2.9! yamt 316: pool_cache_put(mb_cache, m);
1.93 yamt 317: }
1.64 thorpej 318:
1.111.2.7 yamt 319: mutex_enter(&so_pendfree_lock);
1.64 thorpej 320: }
321:
322: return (rv);
323: }
324:
1.80 yamt 325: void
1.111.2.7 yamt 326: soloanfree(struct mbuf *m, void *buf, size_t size, void *arg)
1.64 thorpej 327: {
328:
1.111.2.1 yamt 329: KASSERT(m != NULL);
1.64 thorpej 330:
1.93 yamt 331: /*
332: * postpone freeing mbuf.
333: *
334: * we can't do it in interrupt context
335: * because we need to put kva back to kernel_map.
336: */
337:
1.111.2.7 yamt 338: mutex_enter(&so_pendfree_lock);
1.92 yamt 339: m->m_next = so_pendfree;
340: so_pendfree = m;
1.111.2.7 yamt 341: cv_broadcast(&socurkva_cv);
342: mutex_exit(&so_pendfree_lock);
1.64 thorpej 343: }
344:
345: static long
346: sosend_loan(struct socket *so, struct uio *uio, struct mbuf *m, long space)
347: {
348: struct iovec *iov = uio->uio_iov;
349: vaddr_t sva, eva;
350: vsize_t len;
1.111.2.1 yamt 351: vaddr_t lva;
352: int npgs, error;
1.111.2.2 yamt 353: #if !defined(__HAVE_LAZY_MBUF)
1.111.2.1 yamt 354: vaddr_t va;
355: int i;
1.111.2.2 yamt 356: #endif /* !defined(__HAVE_LAZY_MBUF) */
1.64 thorpej 357:
1.111.2.3 yamt 358: if (VMSPACE_IS_KERNEL_P(uio->uio_vmspace))
1.64 thorpej 359: return (0);
360:
361: if (iov->iov_len < (size_t) space)
362: space = iov->iov_len;
363: if (space > SOCK_LOAN_CHUNK)
364: space = SOCK_LOAN_CHUNK;
365:
366: eva = round_page((vaddr_t) iov->iov_base + space);
367: sva = trunc_page((vaddr_t) iov->iov_base);
368: len = eva - sva;
369: npgs = len >> PAGE_SHIFT;
370:
1.79 thorpej 371: /* XXX KDASSERT */
372: KASSERT(npgs <= M_EXT_MAXPAGES);
373:
1.80 yamt 374: lva = sokvaalloc(len, so);
1.64 thorpej 375: if (lva == 0)
1.80 yamt 376: return 0;
1.64 thorpej 377:
1.111.2.3 yamt 378: error = uvm_loan(&uio->uio_vmspace->vm_map, sva, len,
1.79 thorpej 379: m->m_ext.ext_pgs, UVM_LOAN_TOPAGE);
1.64 thorpej 380: if (error) {
1.80 yamt 381: sokvafree(lva, len);
1.64 thorpej 382: return (0);
383: }
384:
1.111.2.2 yamt 385: #if !defined(__HAVE_LAZY_MBUF)
1.64 thorpej 386: for (i = 0, va = lva; i < npgs; i++, va += PAGE_SIZE)
1.79 thorpej 387: pmap_kenter_pa(va, VM_PAGE_TO_PHYS(m->m_ext.ext_pgs[i]),
388: VM_PROT_READ);
1.64 thorpej 389: pmap_update(pmap_kernel());
1.111.2.2 yamt 390: #endif /* !defined(__HAVE_LAZY_MBUF) */
1.64 thorpej 391:
392: lva += (vaddr_t) iov->iov_base & PAGE_MASK;
393:
1.111.2.7 yamt 394: MEXTADD(m, (void *) lva, space, M_MBUF, soloanfree, so);
1.79 thorpej 395: m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP;
1.64 thorpej 396:
1.111.2.2 yamt 397: #if defined(__HAVE_LAZY_MBUF)
1.111.2.1 yamt 398: m->m_flags |= M_EXT_LAZY;
399: m->m_ext.ext_flags |= M_EXT_LAZY;
1.111.2.2 yamt 400: #endif /* defined(__HAVE_LAZY_MBUF) */
1.111.2.1 yamt 401:
1.64 thorpej 402: uio->uio_resid -= space;
403: /* uio_offset not updated, not set/used for write(2) */
1.111.2.7 yamt 404: uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + space;
1.64 thorpej 405: uio->uio_iov->iov_len -= space;
406: if (uio->uio_iov->iov_len == 0) {
407: uio->uio_iov++;
408: uio->uio_iovcnt--;
409: }
410:
411: return (space);
412: }
413:
1.111.2.3 yamt 414: static int
415: sokva_reclaim_callback(struct callback_entry *ce, void *obj, void *arg)
416: {
417:
418: KASSERT(ce == &sokva_reclaimerentry);
419: KASSERT(obj == NULL);
420:
421: sodopendfree();
422: if (!vm_map_starved_p(kernel_map)) {
423: return CALLBACK_CHAIN_ABORT;
424: }
425: return CALLBACK_CHAIN_CONTINUE;
426: }
427:
1.111.2.8 yamt 428: struct mbuf *
429: getsombuf(struct socket *so)
430: {
431: struct mbuf *m;
432:
433: m = m_get(M_WAIT, MT_SONAME);
434: MCLAIM(m, so->so_mowner);
435: return m;
436: }
437:
438: struct mbuf *
439: m_intopt(struct socket *so, int val)
440: {
441: struct mbuf *m;
442:
443: m = getsombuf(so);
444: m->m_len = sizeof(int);
445: *mtod(m, int *) = val;
446: return m;
447: }
448:
1.111.2.3 yamt 449: void
450: soinit(void)
451: {
452:
1.111.2.7 yamt 453: mutex_init(&so_pendfree_lock, MUTEX_DRIVER, IPL_VM);
454: cv_init(&socurkva_cv, "sokva");
455:
1.111.2.3 yamt 456: /* Set the initial adjusted socket buffer size. */
457: if (sb_max_set(sb_max))
458: panic("bad initial sb_max value: %lu", sb_max);
459:
460: callback_register(&vm_map_to_kernel(kernel_map)->vmk_reclaim_callback,
461: &sokva_reclaimerentry, NULL, sokva_reclaim_callback);
462: }
463:
1.1 cgd 464: /*
465: * Socket operation routines.
466: * These routines are called by the routines in
467: * sys_socket.c or from a system process, and
468: * implement the semantics of socket operations by
469: * switching out to the protocol specific routines.
470: */
471: /*ARGSUSED*/
1.3 andrew 472: int
1.111.2.3 yamt 473: socreate(int dom, struct socket **aso, int type, int proto, struct lwp *l)
1.1 cgd 474: {
1.99 matt 475: const struct protosw *prp;
1.54 lukem 476: struct socket *so;
1.111.2.3 yamt 477: uid_t uid;
1.54 lukem 478: int error, s;
1.1 cgd 479:
1.111.2.6 yamt 480: error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET,
481: KAUTH_REQ_NETWORK_SOCKET_OPEN, KAUTH_ARG(dom), KAUTH_ARG(type),
482: KAUTH_ARG(proto));
1.111.2.7 yamt 483: if (error != 0)
484: return error;
1.111.2.5 yamt 485:
1.1 cgd 486: if (proto)
487: prp = pffindproto(dom, proto, type);
488: else
489: prp = pffindtype(dom, type);
1.111.2.7 yamt 490: if (prp == NULL) {
1.111.2.3 yamt 491: /* no support for domain */
492: if (pffinddomain(dom) == 0)
1.111.2.7 yamt 493: return EAFNOSUPPORT;
1.111.2.3 yamt 494: /* no support for socket type */
495: if (proto == 0 && type != 0)
1.111.2.7 yamt 496: return EPROTOTYPE;
497: return EPROTONOSUPPORT;
1.111.2.3 yamt 498: }
1.111.2.7 yamt 499: if (prp->pr_usrreq == NULL)
500: return EPROTONOSUPPORT;
1.1 cgd 501: if (prp->pr_type != type)
1.111.2.7 yamt 502: return EPROTOTYPE;
1.39 matt 503: s = splsoftnet();
1.37 thorpej 504: so = pool_get(&socket_pool, PR_WAITOK);
1.111.2.7 yamt 505: memset(so, 0, sizeof(*so));
1.31 thorpej 506: TAILQ_INIT(&so->so_q0);
507: TAILQ_INIT(&so->so_q);
1.1 cgd 508: so->so_type = type;
509: so->so_proto = prp;
1.33 matt 510: so->so_send = sosend;
511: so->so_receive = soreceive;
1.78 matt 512: #ifdef MBUFTRACE
513: so->so_rcv.sb_mowner = &prp->pr_domain->dom_mowner;
514: so->so_snd.sb_mowner = &prp->pr_domain->dom_mowner;
515: so->so_mowner = &prp->pr_domain->dom_mowner;
516: #endif
1.111.2.8 yamt 517: selinit(&so->so_rcv.sb_sel);
518: selinit(&so->so_snd.sb_sel);
1.111.2.7 yamt 519: uid = kauth_cred_geteuid(l->l_cred);
1.111.2.3 yamt 520: so->so_uidinfo = uid_find(uid);
1.111.2.7 yamt 521: error = (*prp->pr_usrreq)(so, PRU_ATTACH, NULL,
522: (struct mbuf *)(long)proto, NULL, l);
523: if (error != 0) {
1.1 cgd 524: so->so_state |= SS_NOFDREF;
525: sofree(so);
1.39 matt 526: splx(s);
1.111.2.7 yamt 527: return error;
1.1 cgd 528: }
1.39 matt 529: splx(s);
1.1 cgd 530: *aso = so;
1.111.2.7 yamt 531: return 0;
1.1 cgd 532: }
533:
1.111.2.8 yamt 534: /* On success, write file descriptor to fdout and return zero. On
535: * failure, return non-zero; *fdout will be undefined.
536: */
537: int
538: fsocreate(int domain, struct socket **sop, int type, int protocol,
539: struct lwp *l, int *fdout)
540: {
541: struct filedesc *fdp;
542: struct socket *so;
543: struct file *fp;
544: int fd, error;
545:
546: fdp = l->l_proc->p_fd;
547: /* falloc() will use the desciptor for us */
548: if ((error = falloc(l, &fp, &fd)) != 0)
549: return (error);
550: fp->f_flag = FREAD|FWRITE;
551: fp->f_type = DTYPE_SOCKET;
552: fp->f_ops = &socketops;
553: error = socreate(domain, &so, type, protocol, l);
554: if (error != 0) {
555: FILE_UNUSE(fp, l);
556: fdremove(fdp, fd);
557: ffree(fp);
558: } else {
559: if (sop != NULL)
560: *sop = so;
561: fp->f_data = so;
562: FILE_SET_MATURE(fp);
563: FILE_UNUSE(fp, l);
564: *fdout = fd;
565: }
566: return error;
567: }
568:
1.3 andrew 569: int
1.111.2.3 yamt 570: sobind(struct socket *so, struct mbuf *nam, struct lwp *l)
1.1 cgd 571: {
1.54 lukem 572: int s, error;
1.1 cgd 573:
1.54 lukem 574: s = splsoftnet();
1.111.2.7 yamt 575: error = (*so->so_proto->pr_usrreq)(so, PRU_BIND, NULL, nam, NULL, l);
1.1 cgd 576: splx(s);
1.111.2.7 yamt 577: return error;
1.1 cgd 578: }
579:
1.3 andrew 580: int
1.54 lukem 581: solisten(struct socket *so, int backlog)
1.1 cgd 582: {
1.54 lukem 583: int s, error;
1.1 cgd 584:
1.54 lukem 585: s = splsoftnet();
1.111.2.7 yamt 586: error = (*so->so_proto->pr_usrreq)(so, PRU_LISTEN, NULL,
587: NULL, NULL, NULL);
588: if (error != 0) {
1.1 cgd 589: splx(s);
1.111.2.7 yamt 590: return error;
1.1 cgd 591: }
1.63 matt 592: if (TAILQ_EMPTY(&so->so_q))
1.1 cgd 593: so->so_options |= SO_ACCEPTCONN;
594: if (backlog < 0)
595: backlog = 0;
1.49 jonathan 596: so->so_qlimit = min(backlog, somaxconn);
1.1 cgd 597: splx(s);
1.111.2.7 yamt 598: return 0;
1.1 cgd 599: }
600:
1.21 christos 601: void
1.54 lukem 602: sofree(struct socket *so)
1.1 cgd 603: {
604:
1.43 mycroft 605: if (so->so_pcb || (so->so_state & SS_NOFDREF) == 0)
1.1 cgd 606: return;
1.43 mycroft 607: if (so->so_head) {
608: /*
609: * We must not decommission a socket that's on the accept(2)
610: * queue. If we do, then accept(2) may hang after select(2)
611: * indicated that the listening socket was ready.
612: */
613: if (!soqremque(so, 0))
614: return;
615: }
1.98 christos 616: if (so->so_rcv.sb_hiwat)
1.110 christos 617: (void)chgsbsize(so->so_uidinfo, &so->so_rcv.sb_hiwat, 0,
1.98 christos 618: RLIM_INFINITY);
619: if (so->so_snd.sb_hiwat)
1.110 christos 620: (void)chgsbsize(so->so_uidinfo, &so->so_snd.sb_hiwat, 0,
1.98 christos 621: RLIM_INFINITY);
622: sbrelease(&so->so_snd, so);
1.1 cgd 623: sorflush(so);
1.111.2.8 yamt 624: seldestroy(&so->so_rcv.sb_sel);
625: seldestroy(&so->so_snd.sb_sel);
1.37 thorpej 626: pool_put(&socket_pool, so);
1.1 cgd 627: }
628:
629: /*
630: * Close a socket on last file table reference removal.
631: * Initiate disconnect if connected.
632: * Free socket when disconnect complete.
633: */
1.3 andrew 634: int
1.54 lukem 635: soclose(struct socket *so)
1.1 cgd 636: {
1.54 lukem 637: struct socket *so2;
638: int s, error;
1.1 cgd 639:
1.54 lukem 640: error = 0;
641: s = splsoftnet(); /* conservative */
1.1 cgd 642: if (so->so_options & SO_ACCEPTCONN) {
1.63 matt 643: while ((so2 = TAILQ_FIRST(&so->so_q0)) != 0) {
1.42 mycroft 644: (void) soqremque(so2, 0);
1.41 mycroft 645: (void) soabort(so2);
646: }
1.63 matt 647: while ((so2 = TAILQ_FIRST(&so->so_q)) != 0) {
1.42 mycroft 648: (void) soqremque(so2, 1);
1.41 mycroft 649: (void) soabort(so2);
650: }
1.1 cgd 651: }
652: if (so->so_pcb == 0)
653: goto discard;
654: if (so->so_state & SS_ISCONNECTED) {
655: if ((so->so_state & SS_ISDISCONNECTING) == 0) {
656: error = sodisconnect(so);
657: if (error)
658: goto drop;
659: }
660: if (so->so_options & SO_LINGER) {
661: if ((so->so_state & SS_ISDISCONNECTING) &&
662: (so->so_state & SS_NBIO))
663: goto drop;
1.21 christos 664: while (so->so_state & SS_ISCONNECTED) {
1.111.2.7 yamt 665: error = tsleep((void *)&so->so_timeo,
1.21 christos 666: PSOCK | PCATCH, netcls,
1.30 thorpej 667: so->so_linger * hz);
1.21 christos 668: if (error)
1.1 cgd 669: break;
1.21 christos 670: }
1.1 cgd 671: }
672: }
1.54 lukem 673: drop:
1.1 cgd 674: if (so->so_pcb) {
1.22 mycroft 675: int error2 = (*so->so_proto->pr_usrreq)(so, PRU_DETACH,
1.111.2.7 yamt 676: NULL, NULL, NULL, NULL);
1.1 cgd 677: if (error == 0)
678: error = error2;
679: }
1.54 lukem 680: discard:
1.1 cgd 681: if (so->so_state & SS_NOFDREF)
682: panic("soclose: NOFDREF");
683: so->so_state |= SS_NOFDREF;
684: sofree(so);
685: splx(s);
686: return (error);
687: }
688:
689: /*
1.20 mycroft 690: * Must be called at splsoftnet...
1.1 cgd 691: */
1.3 andrew 692: int
1.54 lukem 693: soabort(struct socket *so)
1.1 cgd 694: {
1.111.2.7 yamt 695: int error;
1.1 cgd 696:
1.111.2.7 yamt 697: KASSERT(so->so_head == NULL);
698: error = (*so->so_proto->pr_usrreq)(so, PRU_ABORT, NULL,
699: NULL, NULL, NULL);
700: if (error) {
701: sofree(so);
702: }
703: return error;
1.1 cgd 704: }
705:
1.3 andrew 706: int
1.54 lukem 707: soaccept(struct socket *so, struct mbuf *nam)
1.1 cgd 708: {
1.54 lukem 709: int s, error;
1.1 cgd 710:
1.54 lukem 711: error = 0;
712: s = splsoftnet();
1.1 cgd 713: if ((so->so_state & SS_NOFDREF) == 0)
714: panic("soaccept: !NOFDREF");
715: so->so_state &= ~SS_NOFDREF;
1.55 thorpej 716: if ((so->so_state & SS_ISDISCONNECTED) == 0 ||
717: (so->so_proto->pr_flags & PR_ABRTACPTDIS) == 0)
1.41 mycroft 718: error = (*so->so_proto->pr_usrreq)(so, PRU_ACCEPT,
1.111.2.7 yamt 719: NULL, nam, NULL, NULL);
1.41 mycroft 720: else
1.53 itojun 721: error = ECONNABORTED;
1.52 itojun 722:
1.1 cgd 723: splx(s);
724: return (error);
725: }
726:
1.3 andrew 727: int
1.111.2.3 yamt 728: soconnect(struct socket *so, struct mbuf *nam, struct lwp *l)
1.1 cgd 729: {
1.54 lukem 730: int s, error;
1.1 cgd 731:
732: if (so->so_options & SO_ACCEPTCONN)
733: return (EOPNOTSUPP);
1.20 mycroft 734: s = splsoftnet();
1.1 cgd 735: /*
736: * If protocol is connection-based, can only connect once.
737: * Otherwise, if connected, try to disconnect first.
738: * This allows user to disconnect by connecting to, e.g.,
739: * a null address.
740: */
741: if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) &&
742: ((so->so_proto->pr_flags & PR_CONNREQUIRED) ||
743: (error = sodisconnect(so))))
744: error = EISCONN;
745: else
746: error = (*so->so_proto->pr_usrreq)(so, PRU_CONNECT,
1.111.2.7 yamt 747: NULL, nam, NULL, l);
1.1 cgd 748: splx(s);
749: return (error);
750: }
751:
1.3 andrew 752: int
1.54 lukem 753: soconnect2(struct socket *so1, struct socket *so2)
1.1 cgd 754: {
1.54 lukem 755: int s, error;
1.1 cgd 756:
1.54 lukem 757: s = splsoftnet();
1.22 mycroft 758: error = (*so1->so_proto->pr_usrreq)(so1, PRU_CONNECT2,
1.111.2.7 yamt 759: NULL, (struct mbuf *)so2, NULL, NULL);
1.1 cgd 760: splx(s);
761: return (error);
762: }
763:
1.3 andrew 764: int
1.54 lukem 765: sodisconnect(struct socket *so)
1.1 cgd 766: {
1.54 lukem 767: int s, error;
1.1 cgd 768:
1.54 lukem 769: s = splsoftnet();
1.1 cgd 770: if ((so->so_state & SS_ISCONNECTED) == 0) {
771: error = ENOTCONN;
772: goto bad;
773: }
774: if (so->so_state & SS_ISDISCONNECTING) {
775: error = EALREADY;
776: goto bad;
777: }
1.22 mycroft 778: error = (*so->so_proto->pr_usrreq)(so, PRU_DISCONNECT,
1.111.2.7 yamt 779: NULL, NULL, NULL, NULL);
1.54 lukem 780: bad:
1.1 cgd 781: splx(s);
1.111.2.3 yamt 782: sodopendfree();
1.1 cgd 783: return (error);
784: }
785:
1.15 mycroft 786: #define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
1.1 cgd 787: /*
788: * Send on a socket.
789: * If send must go all at once and message is larger than
790: * send buffering, then hard error.
791: * Lock against other senders.
792: * If must go all at once and not enough room now, then
793: * inform user that this would block and do nothing.
794: * Otherwise, if nonblocking, send as much as possible.
795: * The data to be sent is described by "uio" if nonzero,
796: * otherwise by the mbuf chain "top" (which must be null
797: * if uio is not). Data provided in mbuf chain must be small
798: * enough to send all at once.
799: *
800: * Returns nonzero on error, timeout or signal; callers
801: * must check for short counts if EINTR/ERESTART are returned.
802: * Data and control buffers are freed on return.
803: */
1.3 andrew 804: int
1.54 lukem 805: sosend(struct socket *so, struct mbuf *addr, struct uio *uio, struct mbuf *top,
1.111.2.3 yamt 806: struct mbuf *control, int flags, struct lwp *l)
1.1 cgd 807: {
1.54 lukem 808: struct mbuf **mp, *m;
1.111.2.3 yamt 809: struct proc *p;
1.58 jdolecek 810: long space, len, resid, clen, mlen;
811: int error, s, dontroute, atomic;
1.54 lukem 812:
1.111.2.3 yamt 813: p = l->l_proc;
814: sodopendfree();
1.64 thorpej 815:
1.54 lukem 816: clen = 0;
817: atomic = sosendallatonce(so) || top;
1.1 cgd 818: if (uio)
819: resid = uio->uio_resid;
820: else
821: resid = top->m_pkthdr.len;
1.7 cgd 822: /*
823: * In theory resid should be unsigned.
824: * However, space must be signed, as it might be less than 0
825: * if we over-committed, and we must use a signed comparison
826: * of space and resid. On the other hand, a negative resid
827: * causes us to loop sending 0-length segments to the protocol.
828: */
1.29 mycroft 829: if (resid < 0) {
830: error = EINVAL;
831: goto out;
832: }
1.1 cgd 833: dontroute =
834: (flags & MSG_DONTROUTE) && (so->so_options & SO_DONTROUTE) == 0 &&
835: (so->so_proto->pr_flags & PR_ATOMIC);
1.102 jonathan 836: if (p)
837: p->p_stats->p_ru.ru_msgsnd++;
1.1 cgd 838: if (control)
839: clen = control->m_len;
840: #define snderr(errno) { error = errno; splx(s); goto release; }
841:
1.54 lukem 842: restart:
1.21 christos 843: if ((error = sblock(&so->so_snd, SBLOCKWAIT(flags))) != 0)
1.1 cgd 844: goto out;
845: do {
1.20 mycroft 846: s = splsoftnet();
1.1 cgd 847: if (so->so_state & SS_CANTSENDMORE)
848: snderr(EPIPE);
1.48 thorpej 849: if (so->so_error) {
850: error = so->so_error;
851: so->so_error = 0;
852: splx(s);
853: goto release;
854: }
1.1 cgd 855: if ((so->so_state & SS_ISCONNECTED) == 0) {
856: if (so->so_proto->pr_flags & PR_CONNREQUIRED) {
857: if ((so->so_state & SS_ISCONFIRMING) == 0 &&
858: !(resid == 0 && clen != 0))
859: snderr(ENOTCONN);
860: } else if (addr == 0)
861: snderr(EDESTADDRREQ);
862: }
863: space = sbspace(&so->so_snd);
864: if (flags & MSG_OOB)
865: space += 1024;
1.21 christos 866: if ((atomic && resid > so->so_snd.sb_hiwat) ||
1.11 mycroft 867: clen > so->so_snd.sb_hiwat)
868: snderr(EMSGSIZE);
1.96 mycroft 869: if (space < resid + clen &&
1.1 cgd 870: (atomic || space < so->so_snd.sb_lowat || space < clen)) {
871: if (so->so_state & SS_NBIO)
872: snderr(EWOULDBLOCK);
873: sbunlock(&so->so_snd);
874: error = sbwait(&so->so_snd);
875: splx(s);
876: if (error)
877: goto out;
878: goto restart;
879: }
880: splx(s);
881: mp = ⊤
882: space -= clen;
883: do {
1.45 tv 884: if (uio == NULL) {
885: /*
886: * Data is prepackaged in "top".
887: */
888: resid = 0;
889: if (flags & MSG_EOR)
890: top->m_flags |= M_EOR;
891: } else do {
1.111.2.8 yamt 892: if (top == NULL) {
1.78 matt 893: m = m_gethdr(M_WAIT, MT_DATA);
1.45 tv 894: mlen = MHLEN;
895: m->m_pkthdr.len = 0;
1.111.2.7 yamt 896: m->m_pkthdr.rcvif = NULL;
1.45 tv 897: } else {
1.78 matt 898: m = m_get(M_WAIT, MT_DATA);
1.45 tv 899: mlen = MLEN;
900: }
1.78 matt 901: MCLAIM(m, so->so_snd.sb_mowner);
1.111.2.3 yamt 902: if (sock_loan_thresh >= 0 &&
903: uio->uio_iov->iov_len >= sock_loan_thresh &&
904: space >= sock_loan_thresh &&
1.64 thorpej 905: (len = sosend_loan(so, uio, m,
906: space)) != 0) {
907: SOSEND_COUNTER_INCR(&sosend_loan_big);
908: space -= len;
909: goto have_data;
910: }
1.45 tv 911: if (resid >= MINCLSIZE && space >= MCLBYTES) {
1.64 thorpej 912: SOSEND_COUNTER_INCR(&sosend_copy_big);
1.78 matt 913: m_clget(m, M_WAIT);
1.45 tv 914: if ((m->m_flags & M_EXT) == 0)
915: goto nopages;
916: mlen = MCLBYTES;
917: if (atomic && top == 0) {
1.58 jdolecek 918: len = lmin(MCLBYTES - max_hdr,
1.54 lukem 919: resid);
1.45 tv 920: m->m_data += max_hdr;
921: } else
1.58 jdolecek 922: len = lmin(MCLBYTES, resid);
1.45 tv 923: space -= len;
924: } else {
1.64 thorpej 925: nopages:
926: SOSEND_COUNTER_INCR(&sosend_copy_small);
1.58 jdolecek 927: len = lmin(lmin(mlen, resid), space);
1.45 tv 928: space -= len;
929: /*
930: * For datagram protocols, leave room
931: * for protocol headers in first mbuf.
932: */
933: if (atomic && top == 0 && len < mlen)
934: MH_ALIGN(m, len);
935: }
1.111.2.8 yamt 936: error = uiomove(mtod(m, void *), (int)len, uio);
1.64 thorpej 937: have_data:
1.45 tv 938: resid = uio->uio_resid;
939: m->m_len = len;
940: *mp = m;
941: top->m_pkthdr.len += len;
1.111.2.8 yamt 942: if (error != 0)
1.45 tv 943: goto release;
944: mp = &m->m_next;
945: if (resid <= 0) {
946: if (flags & MSG_EOR)
947: top->m_flags |= M_EOR;
948: break;
949: }
950: } while (space > 0 && atomic);
1.108 perry 951:
1.46 sommerfe 952: s = splsoftnet();
953:
954: if (so->so_state & SS_CANTSENDMORE)
955: snderr(EPIPE);
1.45 tv 956:
957: if (dontroute)
958: so->so_options |= SO_DONTROUTE;
959: if (resid > 0)
960: so->so_state |= SS_MORETOCOME;
1.46 sommerfe 961: error = (*so->so_proto->pr_usrreq)(so,
962: (flags & MSG_OOB) ? PRU_SENDOOB : PRU_SEND,
1.111.2.3 yamt 963: top, addr, control, curlwp); /* XXX */
1.45 tv 964: if (dontroute)
965: so->so_options &= ~SO_DONTROUTE;
966: if (resid > 0)
967: so->so_state &= ~SS_MORETOCOME;
1.46 sommerfe 968: splx(s);
969:
1.45 tv 970: clen = 0;
1.111.2.8 yamt 971: control = NULL;
972: top = NULL;
1.45 tv 973: mp = ⊤
1.111.2.8 yamt 974: if (error != 0)
1.1 cgd 975: goto release;
976: } while (resid && space > 0);
977: } while (resid);
978:
1.54 lukem 979: release:
1.1 cgd 980: sbunlock(&so->so_snd);
1.54 lukem 981: out:
1.1 cgd 982: if (top)
983: m_freem(top);
984: if (control)
985: m_freem(control);
986: return (error);
987: }
988:
989: /*
990: * Implement receive operations on a socket.
991: * We depend on the way that records are added to the sockbuf
992: * by sbappend*. In particular, each record (mbufs linked through m_next)
993: * must begin with an address if the protocol so specifies,
994: * followed by an optional mbuf or mbufs containing ancillary data,
995: * and then zero or more mbufs of data.
996: * In order to avoid blocking network interrupts for the entire time here,
997: * we splx() while doing the actual copy to user space.
998: * Although the sockbuf is locked, new data may still be appended,
999: * and thus we must maintain consistency of the sockbuf during that time.
1000: *
1001: * The caller may receive the data as a single mbuf chain by supplying
1002: * an mbuf **mp0 for use in returning the chain. The uio is then used
1003: * only for the count in uio_resid.
1004: */
1.3 andrew 1005: int
1.54 lukem 1006: soreceive(struct socket *so, struct mbuf **paddr, struct uio *uio,
1007: struct mbuf **mp0, struct mbuf **controlp, int *flagsp)
1.1 cgd 1008: {
1.111.2.3 yamt 1009: struct lwp *l = curlwp;
1.54 lukem 1010: struct mbuf *m, **mp;
1011: int flags, len, error, s, offset, moff, type, orig_resid;
1.99 matt 1012: const struct protosw *pr;
1.54 lukem 1013: struct mbuf *nextrecord;
1.67 he 1014: int mbuf_removed = 0;
1.64 thorpej 1015:
1.54 lukem 1016: pr = so->so_proto;
1.1 cgd 1017: mp = mp0;
1.54 lukem 1018: type = 0;
1019: orig_resid = uio->uio_resid;
1.102 jonathan 1020:
1.111.2.8 yamt 1021: if (paddr != NULL)
1022: *paddr = NULL;
1023: if (controlp != NULL)
1024: *controlp = NULL;
1025: if (flagsp != NULL)
1.1 cgd 1026: flags = *flagsp &~ MSG_EOR;
1027: else
1028: flags = 0;
1.66 enami 1029:
1030: if ((flags & MSG_DONTWAIT) == 0)
1.111.2.3 yamt 1031: sodopendfree();
1.66 enami 1032:
1.1 cgd 1033: if (flags & MSG_OOB) {
1034: m = m_get(M_WAIT, MT_DATA);
1.17 cgd 1035: error = (*pr->pr_usrreq)(so, PRU_RCVOOB, m,
1.111.2.7 yamt 1036: (struct mbuf *)(long)(flags & MSG_PEEK), NULL, l);
1.1 cgd 1037: if (error)
1038: goto bad;
1039: do {
1.111.2.7 yamt 1040: error = uiomove(mtod(m, void *),
1.1 cgd 1041: (int) min(uio->uio_resid, m->m_len), uio);
1042: m = m_free(m);
1.111.2.8 yamt 1043: } while (uio->uio_resid > 0 && error == 0 && m);
1.54 lukem 1044: bad:
1.111.2.8 yamt 1045: if (m != NULL)
1.1 cgd 1046: m_freem(m);
1.111.2.8 yamt 1047: return error;
1.1 cgd 1048: }
1.111.2.8 yamt 1049: if (mp != NULL)
1.111.2.7 yamt 1050: *mp = NULL;
1.1 cgd 1051: if (so->so_state & SS_ISCONFIRMING && uio->uio_resid)
1.111.2.7 yamt 1052: (*pr->pr_usrreq)(so, PRU_RCVD, NULL, NULL, NULL, l);
1.1 cgd 1053:
1.54 lukem 1054: restart:
1.21 christos 1055: if ((error = sblock(&so->so_rcv, SBLOCKWAIT(flags))) != 0)
1.111.2.8 yamt 1056: return error;
1.20 mycroft 1057: s = splsoftnet();
1.1 cgd 1058:
1059: m = so->so_rcv.sb_mb;
1060: /*
1061: * If we have less data than requested, block awaiting more
1062: * (subject to any timeout) if:
1.15 mycroft 1063: * 1. the current count is less than the low water mark,
1.1 cgd 1064: * 2. MSG_WAITALL is set, and it is possible to do the entire
1.15 mycroft 1065: * receive operation at once if we block (resid <= hiwat), or
1066: * 3. MSG_DONTWAIT is not set.
1.1 cgd 1067: * If MSG_WAITALL is set but resid is larger than the receive buffer,
1068: * we have to do the receive in sections, and thus risk returning
1069: * a short count if a timeout or signal occurs after we start.
1070: */
1.111.2.8 yamt 1071: if (m == NULL ||
1072: ((flags & MSG_DONTWAIT) == 0 &&
1073: so->so_rcv.sb_cc < uio->uio_resid &&
1074: (so->so_rcv.sb_cc < so->so_rcv.sb_lowat ||
1075: ((flags & MSG_WAITALL) &&
1076: uio->uio_resid <= so->so_rcv.sb_hiwat)) &&
1077: m->m_nextpkt == NULL &&
1078: (pr->pr_flags & PR_ATOMIC) == 0)) {
1.1 cgd 1079: #ifdef DIAGNOSTIC
1.111.2.8 yamt 1080: if (m == NULL && so->so_rcv.sb_cc)
1.1 cgd 1081: panic("receive 1");
1082: #endif
1083: if (so->so_error) {
1.111.2.8 yamt 1084: if (m != NULL)
1.15 mycroft 1085: goto dontblock;
1.1 cgd 1086: error = so->so_error;
1087: if ((flags & MSG_PEEK) == 0)
1088: so->so_error = 0;
1089: goto release;
1090: }
1091: if (so->so_state & SS_CANTRCVMORE) {
1.111.2.8 yamt 1092: if (m != NULL)
1.15 mycroft 1093: goto dontblock;
1.1 cgd 1094: else
1095: goto release;
1096: }
1.111.2.8 yamt 1097: for (; m != NULL; m = m->m_next)
1.1 cgd 1098: if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) {
1099: m = so->so_rcv.sb_mb;
1100: goto dontblock;
1101: }
1102: if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 &&
1103: (so->so_proto->pr_flags & PR_CONNREQUIRED)) {
1104: error = ENOTCONN;
1105: goto release;
1106: }
1107: if (uio->uio_resid == 0)
1108: goto release;
1.15 mycroft 1109: if ((so->so_state & SS_NBIO) || (flags & MSG_DONTWAIT)) {
1.1 cgd 1110: error = EWOULDBLOCK;
1111: goto release;
1112: }
1.69 thorpej 1113: SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 1");
1114: SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 1");
1.1 cgd 1115: sbunlock(&so->so_rcv);
1116: error = sbwait(&so->so_rcv);
1117: splx(s);
1.111.2.8 yamt 1118: if (error != 0)
1119: return error;
1.1 cgd 1120: goto restart;
1121: }
1.54 lukem 1122: dontblock:
1.69 thorpej 1123: /*
1124: * On entry here, m points to the first record of the socket buffer.
1125: * While we process the initial mbufs containing address and control
1126: * info, we save a copy of m->m_nextpkt into nextrecord.
1127: */
1.111.2.8 yamt 1128: if (l != NULL)
1.111.2.3 yamt 1129: l->l_proc->p_stats->p_ru.ru_msgrcv++;
1.69 thorpej 1130: KASSERT(m == so->so_rcv.sb_mb);
1131: SBLASTRECORDCHK(&so->so_rcv, "soreceive 1");
1132: SBLASTMBUFCHK(&so->so_rcv, "soreceive 1");
1.1 cgd 1133: nextrecord = m->m_nextpkt;
1134: if (pr->pr_flags & PR_ADDR) {
1135: #ifdef DIAGNOSTIC
1136: if (m->m_type != MT_SONAME)
1137: panic("receive 1a");
1138: #endif
1.3 andrew 1139: orig_resid = 0;
1.1 cgd 1140: if (flags & MSG_PEEK) {
1141: if (paddr)
1142: *paddr = m_copy(m, 0, m->m_len);
1143: m = m->m_next;
1144: } else {
1145: sbfree(&so->so_rcv, m);
1.67 he 1146: mbuf_removed = 1;
1.111.2.8 yamt 1147: if (paddr != NULL) {
1.1 cgd 1148: *paddr = m;
1149: so->so_rcv.sb_mb = m->m_next;
1.111.2.8 yamt 1150: m->m_next = NULL;
1.1 cgd 1151: m = so->so_rcv.sb_mb;
1152: } else {
1153: MFREE(m, so->so_rcv.sb_mb);
1154: m = so->so_rcv.sb_mb;
1155: }
1156: }
1157: }
1.111.2.8 yamt 1158: while (m != NULL && m->m_type == MT_CONTROL && error == 0) {
1.1 cgd 1159: if (flags & MSG_PEEK) {
1.111.2.8 yamt 1160: if (controlp != NULL)
1.1 cgd 1161: *controlp = m_copy(m, 0, m->m_len);
1162: m = m->m_next;
1163: } else {
1164: sbfree(&so->so_rcv, m);
1.67 he 1165: mbuf_removed = 1;
1.111.2.8 yamt 1166: if (controlp != NULL) {
1.102 jonathan 1167: struct domain *dom = pr->pr_domain;
1.111.2.3 yamt 1168: if (dom->dom_externalize && l &&
1.1 cgd 1169: mtod(m, struct cmsghdr *)->cmsg_type ==
1170: SCM_RIGHTS)
1.111.2.3 yamt 1171: error = (*dom->dom_externalize)(m, l);
1.1 cgd 1172: *controlp = m;
1173: so->so_rcv.sb_mb = m->m_next;
1.111.2.8 yamt 1174: m->m_next = NULL;
1.1 cgd 1175: m = so->so_rcv.sb_mb;
1176: } else {
1.106 itojun 1177: /*
1178: * Dispose of any SCM_RIGHTS message that went
1179: * through the read path rather than recv.
1180: */
1181: if (pr->pr_domain->dom_dispose &&
1182: mtod(m, struct cmsghdr *)->cmsg_type == SCM_RIGHTS)
1183: (*pr->pr_domain->dom_dispose)(m);
1.1 cgd 1184: MFREE(m, so->so_rcv.sb_mb);
1185: m = so->so_rcv.sb_mb;
1186: }
1187: }
1.111.2.8 yamt 1188: if (controlp != NULL) {
1.3 andrew 1189: orig_resid = 0;
1.1 cgd 1190: controlp = &(*controlp)->m_next;
1.3 andrew 1191: }
1.1 cgd 1192: }
1.69 thorpej 1193:
1194: /*
1195: * If m is non-NULL, we have some data to read. From now on,
1196: * make sure to keep sb_lastrecord consistent when working on
1197: * the last packet on the chain (nextrecord == NULL) and we
1198: * change m->m_nextpkt.
1199: */
1.111.2.8 yamt 1200: if (m != NULL) {
1.69 thorpej 1201: if ((flags & MSG_PEEK) == 0) {
1.1 cgd 1202: m->m_nextpkt = nextrecord;
1.69 thorpej 1203: /*
1204: * If nextrecord == NULL (this is a single chain),
1205: * then sb_lastrecord may not be valid here if m
1206: * was changed earlier.
1207: */
1208: if (nextrecord == NULL) {
1209: KASSERT(so->so_rcv.sb_mb == m);
1210: so->so_rcv.sb_lastrecord = m;
1211: }
1212: }
1.1 cgd 1213: type = m->m_type;
1214: if (type == MT_OOBDATA)
1215: flags |= MSG_OOB;
1.69 thorpej 1216: } else {
1217: if ((flags & MSG_PEEK) == 0) {
1218: KASSERT(so->so_rcv.sb_mb == m);
1219: so->so_rcv.sb_mb = nextrecord;
1.70 thorpej 1220: SB_EMPTY_FIXUP(&so->so_rcv);
1.69 thorpej 1221: }
1.1 cgd 1222: }
1.69 thorpej 1223: SBLASTRECORDCHK(&so->so_rcv, "soreceive 2");
1224: SBLASTMBUFCHK(&so->so_rcv, "soreceive 2");
1225:
1.1 cgd 1226: moff = 0;
1227: offset = 0;
1.111.2.8 yamt 1228: while (m != NULL && uio->uio_resid > 0 && error == 0) {
1.1 cgd 1229: if (m->m_type == MT_OOBDATA) {
1230: if (type != MT_OOBDATA)
1231: break;
1232: } else if (type == MT_OOBDATA)
1233: break;
1234: #ifdef DIAGNOSTIC
1235: else if (m->m_type != MT_DATA && m->m_type != MT_HEADER)
1236: panic("receive 3");
1237: #endif
1238: so->so_state &= ~SS_RCVATMARK;
1239: len = uio->uio_resid;
1240: if (so->so_oobmark && len > so->so_oobmark - offset)
1241: len = so->so_oobmark - offset;
1242: if (len > m->m_len - moff)
1243: len = m->m_len - moff;
1244: /*
1245: * If mp is set, just pass back the mbufs.
1246: * Otherwise copy them out via the uio, then free.
1247: * Sockbuf must be consistent here (points to current mbuf,
1248: * it points to next record) when we drop priority;
1249: * we must note any additions to the sockbuf when we
1250: * block interrupts again.
1251: */
1.111.2.8 yamt 1252: if (mp == NULL) {
1.69 thorpej 1253: SBLASTRECORDCHK(&so->so_rcv, "soreceive uiomove");
1254: SBLASTMBUFCHK(&so->so_rcv, "soreceive uiomove");
1.1 cgd 1255: splx(s);
1.111.2.7 yamt 1256: error = uiomove(mtod(m, char *) + moff, (int)len, uio);
1.20 mycroft 1257: s = splsoftnet();
1.111.2.8 yamt 1258: if (error != 0) {
1.67 he 1259: /*
1260: * If any part of the record has been removed
1261: * (such as the MT_SONAME mbuf, which will
1262: * happen when PR_ADDR, and thus also
1263: * PR_ATOMIC, is set), then drop the entire
1264: * record to maintain the atomicity of the
1265: * receive operation.
1266: *
1267: * This avoids a later panic("receive 1a")
1268: * when compiled with DIAGNOSTIC.
1269: */
1270: if (m && mbuf_removed
1271: && (pr->pr_flags & PR_ATOMIC))
1272: (void) sbdroprecord(&so->so_rcv);
1273:
1.57 jdolecek 1274: goto release;
1.67 he 1275: }
1.1 cgd 1276: } else
1277: uio->uio_resid -= len;
1278: if (len == m->m_len - moff) {
1279: if (m->m_flags & M_EOR)
1280: flags |= MSG_EOR;
1281: if (flags & MSG_PEEK) {
1282: m = m->m_next;
1283: moff = 0;
1284: } else {
1285: nextrecord = m->m_nextpkt;
1286: sbfree(&so->so_rcv, m);
1287: if (mp) {
1288: *mp = m;
1289: mp = &m->m_next;
1290: so->so_rcv.sb_mb = m = m->m_next;
1.111.2.7 yamt 1291: *mp = NULL;
1.1 cgd 1292: } else {
1293: MFREE(m, so->so_rcv.sb_mb);
1294: m = so->so_rcv.sb_mb;
1295: }
1.69 thorpej 1296: /*
1297: * If m != NULL, we also know that
1298: * so->so_rcv.sb_mb != NULL.
1299: */
1300: KASSERT(so->so_rcv.sb_mb == m);
1301: if (m) {
1.1 cgd 1302: m->m_nextpkt = nextrecord;
1.69 thorpej 1303: if (nextrecord == NULL)
1304: so->so_rcv.sb_lastrecord = m;
1305: } else {
1306: so->so_rcv.sb_mb = nextrecord;
1.70 thorpej 1307: SB_EMPTY_FIXUP(&so->so_rcv);
1.69 thorpej 1308: }
1309: SBLASTRECORDCHK(&so->so_rcv, "soreceive 3");
1310: SBLASTMBUFCHK(&so->so_rcv, "soreceive 3");
1.1 cgd 1311: }
1.111.2.8 yamt 1312: } else if (flags & MSG_PEEK)
1313: moff += len;
1314: else {
1315: if (mp != NULL)
1316: *mp = m_copym(m, 0, len, M_WAIT);
1317: m->m_data += len;
1318: m->m_len -= len;
1319: so->so_rcv.sb_cc -= len;
1.1 cgd 1320: }
1321: if (so->so_oobmark) {
1322: if ((flags & MSG_PEEK) == 0) {
1323: so->so_oobmark -= len;
1324: if (so->so_oobmark == 0) {
1325: so->so_state |= SS_RCVATMARK;
1326: break;
1327: }
1.7 cgd 1328: } else {
1.1 cgd 1329: offset += len;
1.7 cgd 1330: if (offset == so->so_oobmark)
1331: break;
1332: }
1.1 cgd 1333: }
1334: if (flags & MSG_EOR)
1335: break;
1336: /*
1337: * If the MSG_WAITALL flag is set (for non-atomic socket),
1338: * we must not quit until "uio->uio_resid == 0" or an error
1339: * termination. If a signal/timeout occurs, return
1340: * with a short count but without error.
1341: * Keep sockbuf locked against other readers.
1342: */
1.111.2.8 yamt 1343: while (flags & MSG_WAITALL && m == NULL && uio->uio_resid > 0 &&
1.3 andrew 1344: !sosendallatonce(so) && !nextrecord) {
1.1 cgd 1345: if (so->so_error || so->so_state & SS_CANTRCVMORE)
1346: break;
1.68 matt 1347: /*
1348: * If we are peeking and the socket receive buffer is
1349: * full, stop since we can't get more data to peek at.
1350: */
1351: if ((flags & MSG_PEEK) && sbspace(&so->so_rcv) <= 0)
1352: break;
1353: /*
1354: * If we've drained the socket buffer, tell the
1355: * protocol in case it needs to do something to
1356: * get it filled again.
1357: */
1358: if ((pr->pr_flags & PR_WANTRCVD) && so->so_pcb)
1359: (*pr->pr_usrreq)(so, PRU_RCVD,
1.111.2.7 yamt 1360: NULL, (struct mbuf *)(long)flags, NULL, l);
1.69 thorpej 1361: SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 2");
1362: SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 2");
1.1 cgd 1363: error = sbwait(&so->so_rcv);
1.111.2.8 yamt 1364: if (error != 0) {
1.1 cgd 1365: sbunlock(&so->so_rcv);
1366: splx(s);
1.111.2.8 yamt 1367: return 0;
1.1 cgd 1368: }
1.21 christos 1369: if ((m = so->so_rcv.sb_mb) != NULL)
1.1 cgd 1370: nextrecord = m->m_nextpkt;
1371: }
1372: }
1.3 andrew 1373:
1374: if (m && pr->pr_flags & PR_ATOMIC) {
1375: flags |= MSG_TRUNC;
1376: if ((flags & MSG_PEEK) == 0)
1377: (void) sbdroprecord(&so->so_rcv);
1378: }
1.1 cgd 1379: if ((flags & MSG_PEEK) == 0) {
1.111.2.8 yamt 1380: if (m == NULL) {
1.69 thorpej 1381: /*
1.70 thorpej 1382: * First part is an inline SB_EMPTY_FIXUP(). Second
1.69 thorpej 1383: * part makes sure sb_lastrecord is up-to-date if
1384: * there is still data in the socket buffer.
1385: */
1.1 cgd 1386: so->so_rcv.sb_mb = nextrecord;
1.69 thorpej 1387: if (so->so_rcv.sb_mb == NULL) {
1388: so->so_rcv.sb_mbtail = NULL;
1389: so->so_rcv.sb_lastrecord = NULL;
1390: } else if (nextrecord->m_nextpkt == NULL)
1391: so->so_rcv.sb_lastrecord = nextrecord;
1392: }
1393: SBLASTRECORDCHK(&so->so_rcv, "soreceive 4");
1394: SBLASTMBUFCHK(&so->so_rcv, "soreceive 4");
1.1 cgd 1395: if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
1.111.2.7 yamt 1396: (*pr->pr_usrreq)(so, PRU_RCVD, NULL,
1397: (struct mbuf *)(long)flags, NULL, l);
1.1 cgd 1398: }
1.3 andrew 1399: if (orig_resid == uio->uio_resid && orig_resid &&
1400: (flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) {
1401: sbunlock(&so->so_rcv);
1402: splx(s);
1403: goto restart;
1404: }
1.108 perry 1405:
1.111.2.8 yamt 1406: if (flagsp != NULL)
1.1 cgd 1407: *flagsp |= flags;
1.54 lukem 1408: release:
1.1 cgd 1409: sbunlock(&so->so_rcv);
1410: splx(s);
1.111.2.8 yamt 1411: return error;
1.1 cgd 1412: }
1413:
1.14 mycroft 1414: int
1.54 lukem 1415: soshutdown(struct socket *so, int how)
1.1 cgd 1416: {
1.99 matt 1417: const struct protosw *pr;
1.34 kleink 1418:
1.54 lukem 1419: pr = so->so_proto;
1.34 kleink 1420: if (!(how == SHUT_RD || how == SHUT_WR || how == SHUT_RDWR))
1421: return (EINVAL);
1.1 cgd 1422:
1.34 kleink 1423: if (how == SHUT_RD || how == SHUT_RDWR)
1.1 cgd 1424: sorflush(so);
1.34 kleink 1425: if (how == SHUT_WR || how == SHUT_RDWR)
1.111.2.7 yamt 1426: return (*pr->pr_usrreq)(so, PRU_SHUTDOWN, NULL,
1427: NULL, NULL, NULL);
1.111.2.8 yamt 1428: return 0;
1.1 cgd 1429: }
1430:
1.14 mycroft 1431: void
1.54 lukem 1432: sorflush(struct socket *so)
1.1 cgd 1433: {
1.54 lukem 1434: struct sockbuf *sb, asb;
1.99 matt 1435: const struct protosw *pr;
1.54 lukem 1436: int s;
1.1 cgd 1437:
1.54 lukem 1438: sb = &so->so_rcv;
1439: pr = so->so_proto;
1.1 cgd 1440: sb->sb_flags |= SB_NOINTR;
1.15 mycroft 1441: (void) sblock(sb, M_WAITOK);
1.56 thorpej 1442: s = splnet();
1.1 cgd 1443: socantrcvmore(so);
1444: sbunlock(sb);
1445: asb = *sb;
1.86 wrstuden 1446: /*
1447: * Clear most of the sockbuf structure, but leave some of the
1448: * fields valid.
1449: */
1450: memset(&sb->sb_startzero, 0,
1451: sizeof(*sb) - offsetof(struct sockbuf, sb_startzero));
1.1 cgd 1452: splx(s);
1453: if (pr->pr_flags & PR_RIGHTS && pr->pr_domain->dom_dispose)
1454: (*pr->pr_domain->dom_dispose)(asb.sb_mb);
1.98 christos 1455: sbrelease(&asb, so);
1.1 cgd 1456: }
1457:
1.111.2.8 yamt 1458: static int
1459: sosetopt1(struct socket *so, int level, int optname, struct mbuf *m)
1.1 cgd 1460: {
1.111.2.8 yamt 1461: int optval, val;
1.111.2.5 yamt 1462: struct linger *l;
1.111.2.7 yamt 1463: struct sockbuf *sb;
1.111.2.8 yamt 1464: struct timeval *tv;
1.1 cgd 1465:
1.111.2.8 yamt 1466: switch (optname) {
1.1 cgd 1467:
1.111.2.8 yamt 1468: case SO_LINGER:
1469: if (m == NULL || m->m_len != sizeof(struct linger))
1470: return EINVAL;
1471: l = mtod(m, struct linger *);
1472: if (l->l_linger < 0 || l->l_linger > USHRT_MAX ||
1473: l->l_linger > (INT_MAX / hz))
1474: return EDOM;
1475: so->so_linger = l->l_linger;
1476: if (l->l_onoff)
1477: so->so_options |= SO_LINGER;
1478: else
1479: so->so_options &= ~SO_LINGER;
1480: break;
1.1 cgd 1481:
1.111.2.8 yamt 1482: case SO_DEBUG:
1483: case SO_KEEPALIVE:
1484: case SO_DONTROUTE:
1485: case SO_USELOOPBACK:
1486: case SO_BROADCAST:
1487: case SO_REUSEADDR:
1488: case SO_REUSEPORT:
1489: case SO_OOBINLINE:
1490: case SO_TIMESTAMP:
1491: if (m == NULL || m->m_len < sizeof(int))
1492: return EINVAL;
1493: if (*mtod(m, int *))
1494: so->so_options |= optname;
1495: else
1496: so->so_options &= ~optname;
1497: break;
1498:
1499: case SO_SNDBUF:
1500: case SO_RCVBUF:
1501: case SO_SNDLOWAT:
1502: case SO_RCVLOWAT:
1503: if (m == NULL || m->m_len < sizeof(int))
1504: return EINVAL;
1505:
1506: /*
1507: * Values < 1 make no sense for any of these
1508: * options, so disallow them.
1509: */
1510: optval = *mtod(m, int *);
1511: if (optval < 1)
1512: return EINVAL;
1513:
1514: switch (optname) {
1.1 cgd 1515:
1516: case SO_SNDBUF:
1517: case SO_RCVBUF:
1.111.2.8 yamt 1518: sb = (optname == SO_SNDBUF) ?
1519: &so->so_snd : &so->so_rcv;
1520: if (sbreserve(sb, (u_long)optval, so) == 0)
1521: return ENOBUFS;
1522: sb->sb_flags &= ~SB_AUTOSIZE;
1523: break;
1524:
1525: /*
1526: * Make sure the low-water is never greater than
1527: * the high-water.
1528: */
1.1 cgd 1529: case SO_SNDLOWAT:
1.111.2.8 yamt 1530: so->so_snd.sb_lowat =
1531: (optval > so->so_snd.sb_hiwat) ?
1532: so->so_snd.sb_hiwat : optval;
1533: break;
1.1 cgd 1534: case SO_RCVLOWAT:
1.111.2.8 yamt 1535: so->so_rcv.sb_lowat =
1536: (optval > so->so_rcv.sb_hiwat) ?
1537: so->so_rcv.sb_hiwat : optval;
1538: break;
1539: }
1540: break;
1.28 thorpej 1541:
1.111.2.8 yamt 1542: case SO_SNDTIMEO:
1543: case SO_RCVTIMEO:
1544: if (m == NULL || m->m_len < sizeof(*tv))
1545: return EINVAL;
1546: tv = mtod(m, struct timeval *);
1547: if (tv->tv_sec > (INT_MAX - tv->tv_usec / tick) / hz)
1548: return EDOM;
1549: val = tv->tv_sec * hz + tv->tv_usec / tick;
1550: if (val == 0 && tv->tv_usec != 0)
1551: val = 1;
1.1 cgd 1552:
1.111.2.8 yamt 1553: switch (optname) {
1.1 cgd 1554:
1555: case SO_SNDTIMEO:
1.111.2.8 yamt 1556: so->so_snd.sb_timeo = val;
1557: break;
1.1 cgd 1558: case SO_RCVTIMEO:
1.111.2.8 yamt 1559: so->so_rcv.sb_timeo = val;
1560: break;
1561: }
1562: break;
1.1 cgd 1563:
1.111.2.8 yamt 1564: default:
1565: return ENOPROTOOPT;
1566: }
1567: return 0;
1568: }
1.1 cgd 1569:
1.111.2.8 yamt 1570: int
1571: sosetopt(struct socket *so, int level, int optname, struct mbuf *m)
1572: {
1573: int error, prerr;
1.1 cgd 1574:
1.111.2.8 yamt 1575: if (level == SOL_SOCKET)
1576: error = sosetopt1(so, level, optname, m);
1577: else
1578: error = ENOPROTOOPT;
1.1 cgd 1579:
1.111.2.8 yamt 1580: if ((error == 0 || error == ENOPROTOOPT) &&
1581: so->so_proto != NULL && so->so_proto->pr_ctloutput != NULL) {
1582: /* give the protocol stack a shot */
1583: prerr = (*so->so_proto->pr_ctloutput)(PRCO_SETOPT, so, level,
1584: optname, &m);
1585: if (prerr == 0)
1586: error = 0;
1587: else if (prerr != ENOPROTOOPT)
1588: error = prerr;
1589: } else if (m != NULL)
1590: (void)m_free(m);
1591: return error;
1.1 cgd 1592: }
1593:
1.14 mycroft 1594: int
1.54 lukem 1595: sogetopt(struct socket *so, int level, int optname, struct mbuf **mp)
1.1 cgd 1596: {
1.54 lukem 1597: struct mbuf *m;
1.1 cgd 1598:
1599: if (level != SOL_SOCKET) {
1600: if (so->so_proto && so->so_proto->pr_ctloutput) {
1601: return ((*so->so_proto->pr_ctloutput)
1602: (PRCO_GETOPT, so, level, optname, mp));
1603: } else
1604: return (ENOPROTOOPT);
1605: } else {
1606: m = m_get(M_WAIT, MT_SOOPTS);
1.36 perry 1607: m->m_len = sizeof(int);
1.1 cgd 1608:
1609: switch (optname) {
1610:
1611: case SO_LINGER:
1.36 perry 1612: m->m_len = sizeof(struct linger);
1.1 cgd 1613: mtod(m, struct linger *)->l_onoff =
1.111.2.5 yamt 1614: (so->so_options & SO_LINGER) ? 1 : 0;
1.1 cgd 1615: mtod(m, struct linger *)->l_linger = so->so_linger;
1616: break;
1617:
1618: case SO_USELOOPBACK:
1619: case SO_DONTROUTE:
1620: case SO_DEBUG:
1621: case SO_KEEPALIVE:
1622: case SO_REUSEADDR:
1.15 mycroft 1623: case SO_REUSEPORT:
1.1 cgd 1624: case SO_BROADCAST:
1625: case SO_OOBINLINE:
1.26 thorpej 1626: case SO_TIMESTAMP:
1.111.2.5 yamt 1627: *mtod(m, int *) = (so->so_options & optname) ? 1 : 0;
1.1 cgd 1628: break;
1629:
1630: case SO_TYPE:
1631: *mtod(m, int *) = so->so_type;
1632: break;
1633:
1634: case SO_ERROR:
1635: *mtod(m, int *) = so->so_error;
1636: so->so_error = 0;
1637: break;
1638:
1639: case SO_SNDBUF:
1640: *mtod(m, int *) = so->so_snd.sb_hiwat;
1641: break;
1642:
1643: case SO_RCVBUF:
1644: *mtod(m, int *) = so->so_rcv.sb_hiwat;
1645: break;
1646:
1647: case SO_SNDLOWAT:
1648: *mtod(m, int *) = so->so_snd.sb_lowat;
1649: break;
1650:
1651: case SO_RCVLOWAT:
1652: *mtod(m, int *) = so->so_rcv.sb_lowat;
1653: break;
1654:
1655: case SO_SNDTIMEO:
1656: case SO_RCVTIMEO:
1657: {
1658: int val = (optname == SO_SNDTIMEO ?
1659: so->so_snd.sb_timeo : so->so_rcv.sb_timeo);
1660:
1661: m->m_len = sizeof(struct timeval);
1662: mtod(m, struct timeval *)->tv_sec = val / hz;
1663: mtod(m, struct timeval *)->tv_usec =
1.27 kleink 1664: (val % hz) * tick;
1.1 cgd 1665: break;
1666: }
1667:
1.107 darrenr 1668: case SO_OVERFLOWED:
1669: *mtod(m, int *) = so->so_rcv.sb_overflowed;
1670: break;
1671:
1.1 cgd 1672: default:
1673: (void)m_free(m);
1674: return (ENOPROTOOPT);
1675: }
1676: *mp = m;
1677: return (0);
1678: }
1679: }
1680:
1.14 mycroft 1681: void
1.54 lukem 1682: sohasoutofband(struct socket *so)
1.1 cgd 1683: {
1.90 christos 1684: fownsignal(so->so_pgid, SIGURG, POLL_PRI, POLLPRI|POLLRDBAND, so);
1.2 cgd 1685: selwakeup(&so->so_rcv.sb_sel);
1.1 cgd 1686: }
1.72 jdolecek 1687:
1688: static void
1689: filt_sordetach(struct knote *kn)
1690: {
1691: struct socket *so;
1692:
1693: so = (struct socket *)kn->kn_fp->f_data;
1.73 christos 1694: SLIST_REMOVE(&so->so_rcv.sb_sel.sel_klist, kn, knote, kn_selnext);
1695: if (SLIST_EMPTY(&so->so_rcv.sb_sel.sel_klist))
1.72 jdolecek 1696: so->so_rcv.sb_flags &= ~SB_KNOTE;
1697: }
1698:
1699: /*ARGSUSED*/
1700: static int
1701: filt_soread(struct knote *kn, long hint)
1702: {
1703: struct socket *so;
1704:
1705: so = (struct socket *)kn->kn_fp->f_data;
1706: kn->kn_data = so->so_rcv.sb_cc;
1707: if (so->so_state & SS_CANTRCVMORE) {
1.108 perry 1708: kn->kn_flags |= EV_EOF;
1.72 jdolecek 1709: kn->kn_fflags = so->so_error;
1710: return (1);
1711: }
1712: if (so->so_error) /* temporary udp error */
1713: return (1);
1714: if (kn->kn_sfflags & NOTE_LOWAT)
1715: return (kn->kn_data >= kn->kn_sdata);
1716: return (kn->kn_data >= so->so_rcv.sb_lowat);
1717: }
1718:
1719: static void
1720: filt_sowdetach(struct knote *kn)
1721: {
1722: struct socket *so;
1723:
1724: so = (struct socket *)kn->kn_fp->f_data;
1.73 christos 1725: SLIST_REMOVE(&so->so_snd.sb_sel.sel_klist, kn, knote, kn_selnext);
1726: if (SLIST_EMPTY(&so->so_snd.sb_sel.sel_klist))
1.72 jdolecek 1727: so->so_snd.sb_flags &= ~SB_KNOTE;
1728: }
1729:
1730: /*ARGSUSED*/
1731: static int
1732: filt_sowrite(struct knote *kn, long hint)
1733: {
1734: struct socket *so;
1735:
1736: so = (struct socket *)kn->kn_fp->f_data;
1737: kn->kn_data = sbspace(&so->so_snd);
1738: if (so->so_state & SS_CANTSENDMORE) {
1.108 perry 1739: kn->kn_flags |= EV_EOF;
1.72 jdolecek 1740: kn->kn_fflags = so->so_error;
1741: return (1);
1742: }
1743: if (so->so_error) /* temporary udp error */
1744: return (1);
1745: if (((so->so_state & SS_ISCONNECTED) == 0) &&
1746: (so->so_proto->pr_flags & PR_CONNREQUIRED))
1747: return (0);
1748: if (kn->kn_sfflags & NOTE_LOWAT)
1749: return (kn->kn_data >= kn->kn_sdata);
1750: return (kn->kn_data >= so->so_snd.sb_lowat);
1751: }
1752:
1753: /*ARGSUSED*/
1754: static int
1755: filt_solisten(struct knote *kn, long hint)
1756: {
1757: struct socket *so;
1758:
1759: so = (struct socket *)kn->kn_fp->f_data;
1760:
1761: /*
1762: * Set kn_data to number of incoming connections, not
1763: * counting partial (incomplete) connections.
1.108 perry 1764: */
1.72 jdolecek 1765: kn->kn_data = so->so_qlen;
1766: return (kn->kn_data > 0);
1767: }
1768:
1769: static const struct filterops solisten_filtops =
1770: { 1, NULL, filt_sordetach, filt_solisten };
1771: static const struct filterops soread_filtops =
1772: { 1, NULL, filt_sordetach, filt_soread };
1773: static const struct filterops sowrite_filtops =
1774: { 1, NULL, filt_sowdetach, filt_sowrite };
1775:
1776: int
1777: soo_kqfilter(struct file *fp, struct knote *kn)
1778: {
1779: struct socket *so;
1780: struct sockbuf *sb;
1781:
1782: so = (struct socket *)kn->kn_fp->f_data;
1783: switch (kn->kn_filter) {
1784: case EVFILT_READ:
1785: if (so->so_options & SO_ACCEPTCONN)
1786: kn->kn_fop = &solisten_filtops;
1787: else
1788: kn->kn_fop = &soread_filtops;
1789: sb = &so->so_rcv;
1790: break;
1791: case EVFILT_WRITE:
1792: kn->kn_fop = &sowrite_filtops;
1793: sb = &so->so_snd;
1794: break;
1795: default:
1796: return (1);
1797: }
1.73 christos 1798: SLIST_INSERT_HEAD(&sb->sb_sel.sel_klist, kn, kn_selnext);
1.72 jdolecek 1799: sb->sb_flags |= SB_KNOTE;
1800: return (0);
1801: }
1802:
1.94 yamt 1803: #include <sys/sysctl.h>
1804:
1805: static int sysctl_kern_somaxkva(SYSCTLFN_PROTO);
1806:
1807: /*
1808: * sysctl helper routine for kern.somaxkva. ensures that the given
1809: * value is not too small.
1810: * (XXX should we maybe make sure it's not too large as well?)
1811: */
1812: static int
1813: sysctl_kern_somaxkva(SYSCTLFN_ARGS)
1814: {
1815: int error, new_somaxkva;
1816: struct sysctlnode node;
1817:
1818: new_somaxkva = somaxkva;
1819: node = *rnode;
1820: node.sysctl_data = &new_somaxkva;
1821: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1822: if (error || newp == NULL)
1823: return (error);
1824:
1825: if (new_somaxkva < (16 * 1024 * 1024)) /* sanity */
1826: return (EINVAL);
1827:
1.111.2.7 yamt 1828: mutex_enter(&so_pendfree_lock);
1.94 yamt 1829: somaxkva = new_somaxkva;
1.111.2.7 yamt 1830: cv_broadcast(&socurkva_cv);
1831: mutex_exit(&so_pendfree_lock);
1.94 yamt 1832:
1833: return (error);
1834: }
1835:
1836: SYSCTL_SETUP(sysctl_kern_somaxkva_setup, "sysctl kern.somaxkva setup")
1837: {
1838:
1.97 atatat 1839: sysctl_createv(clog, 0, NULL, NULL,
1840: CTLFLAG_PERMANENT,
1841: CTLTYPE_NODE, "kern", NULL,
1842: NULL, 0, NULL, 0,
1843: CTL_KERN, CTL_EOL);
1844:
1845: sysctl_createv(clog, 0, NULL, NULL,
1846: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.103 atatat 1847: CTLTYPE_INT, "somaxkva",
1848: SYSCTL_DESCR("Maximum amount of kernel memory to be "
1849: "used for socket buffers"),
1.94 yamt 1850: sysctl_kern_somaxkva, 0, NULL, 0,
1851: CTL_KERN, KERN_SOMAXKVA, CTL_EOL);
1852: }
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