Annotation of src/sys/kern/uipc_socket.c, Revision 1.111.2.14
1.111.2.14! yamt 1: /* $NetBSD: uipc_socket.c,v 1.111.2.13 2008/02/27 09:24:06 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>
1.111.2.14! yamt 71: __KERNEL_RCSID(0, "$NetBSD: uipc_socket.c,v 1.111.2.13 2008/02/27 09:24:06 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
1.111.2.13 yamt 254: sodoloanfree(struct vm_page **pgs, void *buf, size_t size)
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:
1.111.2.13 yamt 267: pmap_kremove(sva, len);
268: pmap_update(pmap_kernel());
1.64 thorpej 269: uvm_unloan(pgs, npgs, UVM_LOAN_TOPAGE);
1.80 yamt 270: sokvafree(sva, len);
1.64 thorpej 271: }
272:
273: static size_t
1.111.2.14! yamt 274: sodopendfree(void)
1.64 thorpej 275: {
1.93 yamt 276: size_t rv;
1.64 thorpej 277:
1.111.2.7 yamt 278: mutex_enter(&so_pendfree_lock);
1.111.2.3 yamt 279: rv = sodopendfreel();
1.111.2.7 yamt 280: mutex_exit(&so_pendfree_lock);
1.93 yamt 281:
282: return rv;
283: }
284:
285: /*
286: * sodopendfreel: free mbufs on "pendfree" list.
1.111.2.7 yamt 287: * unlock and relock so_pendfree_lock when freeing mbufs.
1.93 yamt 288: *
1.111.2.7 yamt 289: * => called with so_pendfree_lock held.
1.93 yamt 290: */
291:
292: static size_t
1.111.2.14! yamt 293: sodopendfreel(void)
1.93 yamt 294: {
1.111.2.7 yamt 295: struct mbuf *m, *next;
1.93 yamt 296: size_t rv = 0;
297:
1.111.2.7 yamt 298: KASSERT(mutex_owned(&so_pendfree_lock));
1.93 yamt 299:
1.111.2.7 yamt 300: while (so_pendfree != NULL) {
1.64 thorpej 301: m = so_pendfree;
1.93 yamt 302: so_pendfree = NULL;
1.111.2.7 yamt 303: mutex_exit(&so_pendfree_lock);
1.93 yamt 304:
305: for (; m != NULL; m = next) {
306: next = m->m_next;
1.111.2.1 yamt 307: KASSERT((~m->m_flags & (M_EXT|M_EXT_PAGES)) == 0);
1.111.2.4 yamt 308: KASSERT(m->m_ext.ext_refcnt == 0);
1.93 yamt 309:
310: rv += m->m_ext.ext_size;
1.111.2.1 yamt 311: sodoloanfree(m->m_ext.ext_pgs, m->m_ext.ext_buf,
1.111.2.13 yamt 312: m->m_ext.ext_size);
1.111.2.9 yamt 313: pool_cache_put(mb_cache, m);
1.93 yamt 314: }
1.64 thorpej 315:
1.111.2.7 yamt 316: mutex_enter(&so_pendfree_lock);
1.64 thorpej 317: }
318:
319: return (rv);
320: }
321:
1.80 yamt 322: void
1.111.2.7 yamt 323: soloanfree(struct mbuf *m, void *buf, size_t size, void *arg)
1.64 thorpej 324: {
325:
1.111.2.1 yamt 326: KASSERT(m != NULL);
1.64 thorpej 327:
1.93 yamt 328: /*
329: * postpone freeing mbuf.
330: *
331: * we can't do it in interrupt context
332: * because we need to put kva back to kernel_map.
333: */
334:
1.111.2.7 yamt 335: mutex_enter(&so_pendfree_lock);
1.92 yamt 336: m->m_next = so_pendfree;
337: so_pendfree = m;
1.111.2.7 yamt 338: cv_broadcast(&socurkva_cv);
339: mutex_exit(&so_pendfree_lock);
1.64 thorpej 340: }
341:
342: static long
343: sosend_loan(struct socket *so, struct uio *uio, struct mbuf *m, long space)
344: {
345: struct iovec *iov = uio->uio_iov;
346: vaddr_t sva, eva;
347: vsize_t len;
1.111.2.1 yamt 348: vaddr_t lva;
349: int npgs, error;
350: vaddr_t va;
351: int i;
1.64 thorpej 352:
1.111.2.3 yamt 353: if (VMSPACE_IS_KERNEL_P(uio->uio_vmspace))
1.64 thorpej 354: return (0);
355:
356: if (iov->iov_len < (size_t) space)
357: space = iov->iov_len;
358: if (space > SOCK_LOAN_CHUNK)
359: space = SOCK_LOAN_CHUNK;
360:
361: eva = round_page((vaddr_t) iov->iov_base + space);
362: sva = trunc_page((vaddr_t) iov->iov_base);
363: len = eva - sva;
364: npgs = len >> PAGE_SHIFT;
365:
1.79 thorpej 366: /* XXX KDASSERT */
367: KASSERT(npgs <= M_EXT_MAXPAGES);
368:
1.80 yamt 369: lva = sokvaalloc(len, so);
1.64 thorpej 370: if (lva == 0)
1.80 yamt 371: return 0;
1.64 thorpej 372:
1.111.2.3 yamt 373: error = uvm_loan(&uio->uio_vmspace->vm_map, sva, len,
1.79 thorpej 374: m->m_ext.ext_pgs, UVM_LOAN_TOPAGE);
1.64 thorpej 375: if (error) {
1.80 yamt 376: sokvafree(lva, len);
1.64 thorpej 377: return (0);
378: }
379:
380: for (i = 0, va = lva; i < npgs; i++, va += PAGE_SIZE)
1.79 thorpej 381: pmap_kenter_pa(va, VM_PAGE_TO_PHYS(m->m_ext.ext_pgs[i]),
382: VM_PROT_READ);
1.64 thorpej 383: pmap_update(pmap_kernel());
384:
385: lva += (vaddr_t) iov->iov_base & PAGE_MASK;
386:
1.111.2.7 yamt 387: MEXTADD(m, (void *) lva, space, M_MBUF, soloanfree, so);
1.79 thorpej 388: m->m_flags |= M_EXT_PAGES | M_EXT_ROMAP;
1.64 thorpej 389:
390: uio->uio_resid -= space;
391: /* uio_offset not updated, not set/used for write(2) */
1.111.2.7 yamt 392: uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + space;
1.64 thorpej 393: uio->uio_iov->iov_len -= space;
394: if (uio->uio_iov->iov_len == 0) {
395: uio->uio_iov++;
396: uio->uio_iovcnt--;
397: }
398:
399: return (space);
400: }
401:
1.111.2.3 yamt 402: static int
403: sokva_reclaim_callback(struct callback_entry *ce, void *obj, void *arg)
404: {
405:
406: KASSERT(ce == &sokva_reclaimerentry);
407: KASSERT(obj == NULL);
408:
409: sodopendfree();
410: if (!vm_map_starved_p(kernel_map)) {
411: return CALLBACK_CHAIN_ABORT;
412: }
413: return CALLBACK_CHAIN_CONTINUE;
414: }
415:
1.111.2.8 yamt 416: struct mbuf *
1.111.2.10 yamt 417: getsombuf(struct socket *so, int type)
1.111.2.8 yamt 418: {
419: struct mbuf *m;
420:
1.111.2.10 yamt 421: m = m_get(M_WAIT, type);
1.111.2.8 yamt 422: MCLAIM(m, so->so_mowner);
423: return m;
424: }
425:
426: struct mbuf *
427: m_intopt(struct socket *so, int val)
428: {
429: struct mbuf *m;
430:
1.111.2.10 yamt 431: m = getsombuf(so, MT_SOOPTS);
1.111.2.8 yamt 432: m->m_len = sizeof(int);
433: *mtod(m, int *) = val;
434: return m;
435: }
436:
1.111.2.3 yamt 437: void
438: soinit(void)
439: {
440:
1.111.2.10 yamt 441: mutex_init(&so_pendfree_lock, MUTEX_DEFAULT, IPL_VM);
1.111.2.7 yamt 442: cv_init(&socurkva_cv, "sokva");
443:
1.111.2.3 yamt 444: /* Set the initial adjusted socket buffer size. */
445: if (sb_max_set(sb_max))
446: panic("bad initial sb_max value: %lu", sb_max);
447:
448: callback_register(&vm_map_to_kernel(kernel_map)->vmk_reclaim_callback,
449: &sokva_reclaimerentry, NULL, sokva_reclaim_callback);
450: }
451:
1.1 cgd 452: /*
453: * Socket operation routines.
454: * These routines are called by the routines in
455: * sys_socket.c or from a system process, and
456: * implement the semantics of socket operations by
457: * switching out to the protocol specific routines.
458: */
459: /*ARGSUSED*/
1.3 andrew 460: int
1.111.2.3 yamt 461: socreate(int dom, struct socket **aso, int type, int proto, struct lwp *l)
1.1 cgd 462: {
1.99 matt 463: const struct protosw *prp;
1.54 lukem 464: struct socket *so;
1.111.2.3 yamt 465: uid_t uid;
1.54 lukem 466: int error, s;
1.1 cgd 467:
1.111.2.6 yamt 468: error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET,
469: KAUTH_REQ_NETWORK_SOCKET_OPEN, KAUTH_ARG(dom), KAUTH_ARG(type),
470: KAUTH_ARG(proto));
1.111.2.7 yamt 471: if (error != 0)
472: return error;
1.111.2.5 yamt 473:
1.1 cgd 474: if (proto)
475: prp = pffindproto(dom, proto, type);
476: else
477: prp = pffindtype(dom, type);
1.111.2.7 yamt 478: if (prp == NULL) {
1.111.2.3 yamt 479: /* no support for domain */
480: if (pffinddomain(dom) == 0)
1.111.2.7 yamt 481: return EAFNOSUPPORT;
1.111.2.3 yamt 482: /* no support for socket type */
483: if (proto == 0 && type != 0)
1.111.2.7 yamt 484: return EPROTOTYPE;
485: return EPROTONOSUPPORT;
1.111.2.3 yamt 486: }
1.111.2.7 yamt 487: if (prp->pr_usrreq == NULL)
488: return EPROTONOSUPPORT;
1.1 cgd 489: if (prp->pr_type != type)
1.111.2.7 yamt 490: return EPROTOTYPE;
1.39 matt 491: s = splsoftnet();
1.37 thorpej 492: so = pool_get(&socket_pool, PR_WAITOK);
1.111.2.7 yamt 493: memset(so, 0, sizeof(*so));
1.31 thorpej 494: TAILQ_INIT(&so->so_q0);
495: TAILQ_INIT(&so->so_q);
1.1 cgd 496: so->so_type = type;
497: so->so_proto = prp;
1.33 matt 498: so->so_send = sosend;
499: so->so_receive = soreceive;
1.78 matt 500: #ifdef MBUFTRACE
501: so->so_rcv.sb_mowner = &prp->pr_domain->dom_mowner;
502: so->so_snd.sb_mowner = &prp->pr_domain->dom_mowner;
503: so->so_mowner = &prp->pr_domain->dom_mowner;
504: #endif
1.111.2.8 yamt 505: selinit(&so->so_rcv.sb_sel);
506: selinit(&so->so_snd.sb_sel);
1.111.2.7 yamt 507: uid = kauth_cred_geteuid(l->l_cred);
1.111.2.3 yamt 508: so->so_uidinfo = uid_find(uid);
1.111.2.7 yamt 509: error = (*prp->pr_usrreq)(so, PRU_ATTACH, NULL,
510: (struct mbuf *)(long)proto, NULL, l);
511: if (error != 0) {
1.1 cgd 512: so->so_state |= SS_NOFDREF;
513: sofree(so);
1.39 matt 514: splx(s);
1.111.2.7 yamt 515: return error;
1.1 cgd 516: }
1.39 matt 517: splx(s);
1.1 cgd 518: *aso = so;
1.111.2.7 yamt 519: return 0;
1.1 cgd 520: }
521:
1.111.2.8 yamt 522: /* On success, write file descriptor to fdout and return zero. On
523: * failure, return non-zero; *fdout will be undefined.
524: */
525: int
526: fsocreate(int domain, struct socket **sop, int type, int protocol,
527: struct lwp *l, int *fdout)
528: {
529: struct filedesc *fdp;
530: struct socket *so;
531: struct file *fp;
532: int fd, error;
533:
534: fdp = l->l_proc->p_fd;
535: /* falloc() will use the desciptor for us */
536: if ((error = falloc(l, &fp, &fd)) != 0)
537: return (error);
538: fp->f_flag = FREAD|FWRITE;
539: fp->f_type = DTYPE_SOCKET;
540: fp->f_ops = &socketops;
541: error = socreate(domain, &so, type, protocol, l);
542: if (error != 0) {
543: FILE_UNUSE(fp, l);
544: fdremove(fdp, fd);
545: ffree(fp);
546: } else {
547: if (sop != NULL)
548: *sop = so;
549: fp->f_data = so;
550: FILE_SET_MATURE(fp);
551: FILE_UNUSE(fp, l);
552: *fdout = fd;
553: }
554: return error;
555: }
556:
1.3 andrew 557: int
1.111.2.3 yamt 558: sobind(struct socket *so, struct mbuf *nam, struct lwp *l)
1.1 cgd 559: {
1.54 lukem 560: int s, error;
1.1 cgd 561:
1.54 lukem 562: s = splsoftnet();
1.111.2.7 yamt 563: error = (*so->so_proto->pr_usrreq)(so, PRU_BIND, NULL, nam, NULL, l);
1.1 cgd 564: splx(s);
1.111.2.7 yamt 565: return error;
1.1 cgd 566: }
567:
1.3 andrew 568: int
1.111.2.11 yamt 569: solisten(struct socket *so, int backlog, struct lwp *l)
1.1 cgd 570: {
1.54 lukem 571: int s, error;
1.1 cgd 572:
1.54 lukem 573: s = splsoftnet();
1.111.2.7 yamt 574: error = (*so->so_proto->pr_usrreq)(so, PRU_LISTEN, NULL,
1.111.2.11 yamt 575: NULL, NULL, l);
1.111.2.7 yamt 576: if (error != 0) {
1.1 cgd 577: splx(s);
1.111.2.7 yamt 578: return error;
1.1 cgd 579: }
1.63 matt 580: if (TAILQ_EMPTY(&so->so_q))
1.1 cgd 581: so->so_options |= SO_ACCEPTCONN;
582: if (backlog < 0)
583: backlog = 0;
1.49 jonathan 584: so->so_qlimit = min(backlog, somaxconn);
1.1 cgd 585: splx(s);
1.111.2.7 yamt 586: return 0;
1.1 cgd 587: }
588:
1.21 christos 589: void
1.54 lukem 590: sofree(struct socket *so)
1.1 cgd 591: {
592:
1.43 mycroft 593: if (so->so_pcb || (so->so_state & SS_NOFDREF) == 0)
1.1 cgd 594: return;
1.43 mycroft 595: if (so->so_head) {
596: /*
597: * We must not decommission a socket that's on the accept(2)
598: * queue. If we do, then accept(2) may hang after select(2)
599: * indicated that the listening socket was ready.
600: */
601: if (!soqremque(so, 0))
602: return;
603: }
1.98 christos 604: if (so->so_rcv.sb_hiwat)
1.110 christos 605: (void)chgsbsize(so->so_uidinfo, &so->so_rcv.sb_hiwat, 0,
1.98 christos 606: RLIM_INFINITY);
607: if (so->so_snd.sb_hiwat)
1.110 christos 608: (void)chgsbsize(so->so_uidinfo, &so->so_snd.sb_hiwat, 0,
1.98 christos 609: RLIM_INFINITY);
610: sbrelease(&so->so_snd, so);
1.1 cgd 611: sorflush(so);
1.111.2.8 yamt 612: seldestroy(&so->so_rcv.sb_sel);
613: seldestroy(&so->so_snd.sb_sel);
1.37 thorpej 614: pool_put(&socket_pool, so);
1.1 cgd 615: }
616:
617: /*
618: * Close a socket on last file table reference removal.
619: * Initiate disconnect if connected.
620: * Free socket when disconnect complete.
621: */
1.3 andrew 622: int
1.54 lukem 623: soclose(struct socket *so)
1.1 cgd 624: {
1.54 lukem 625: struct socket *so2;
626: int s, error;
1.1 cgd 627:
1.54 lukem 628: error = 0;
629: s = splsoftnet(); /* conservative */
1.1 cgd 630: if (so->so_options & SO_ACCEPTCONN) {
1.63 matt 631: while ((so2 = TAILQ_FIRST(&so->so_q0)) != 0) {
1.42 mycroft 632: (void) soqremque(so2, 0);
1.41 mycroft 633: (void) soabort(so2);
634: }
1.63 matt 635: while ((so2 = TAILQ_FIRST(&so->so_q)) != 0) {
1.42 mycroft 636: (void) soqremque(so2, 1);
1.41 mycroft 637: (void) soabort(so2);
638: }
1.1 cgd 639: }
640: if (so->so_pcb == 0)
641: goto discard;
642: if (so->so_state & SS_ISCONNECTED) {
643: if ((so->so_state & SS_ISDISCONNECTING) == 0) {
644: error = sodisconnect(so);
645: if (error)
646: goto drop;
647: }
648: if (so->so_options & SO_LINGER) {
1.111.2.12 yamt 649: if ((so->so_state & SS_ISDISCONNECTING) && so->so_nbio)
1.1 cgd 650: goto drop;
1.21 christos 651: while (so->so_state & SS_ISCONNECTED) {
1.111.2.7 yamt 652: error = tsleep((void *)&so->so_timeo,
1.21 christos 653: PSOCK | PCATCH, netcls,
1.30 thorpej 654: so->so_linger * hz);
1.21 christos 655: if (error)
1.1 cgd 656: break;
1.21 christos 657: }
1.1 cgd 658: }
659: }
1.54 lukem 660: drop:
1.1 cgd 661: if (so->so_pcb) {
1.22 mycroft 662: int error2 = (*so->so_proto->pr_usrreq)(so, PRU_DETACH,
1.111.2.7 yamt 663: NULL, NULL, NULL, NULL);
1.1 cgd 664: if (error == 0)
665: error = error2;
666: }
1.54 lukem 667: discard:
1.1 cgd 668: if (so->so_state & SS_NOFDREF)
669: panic("soclose: NOFDREF");
670: so->so_state |= SS_NOFDREF;
671: sofree(so);
672: splx(s);
673: return (error);
674: }
675:
676: /*
1.20 mycroft 677: * Must be called at splsoftnet...
1.1 cgd 678: */
1.3 andrew 679: int
1.54 lukem 680: soabort(struct socket *so)
1.1 cgd 681: {
1.111.2.7 yamt 682: int error;
1.1 cgd 683:
1.111.2.7 yamt 684: KASSERT(so->so_head == NULL);
685: error = (*so->so_proto->pr_usrreq)(so, PRU_ABORT, NULL,
686: NULL, NULL, NULL);
687: if (error) {
688: sofree(so);
689: }
690: return error;
1.1 cgd 691: }
692:
1.3 andrew 693: int
1.54 lukem 694: soaccept(struct socket *so, struct mbuf *nam)
1.1 cgd 695: {
1.54 lukem 696: int s, error;
1.1 cgd 697:
1.54 lukem 698: error = 0;
699: s = splsoftnet();
1.1 cgd 700: if ((so->so_state & SS_NOFDREF) == 0)
701: panic("soaccept: !NOFDREF");
702: so->so_state &= ~SS_NOFDREF;
1.55 thorpej 703: if ((so->so_state & SS_ISDISCONNECTED) == 0 ||
704: (so->so_proto->pr_flags & PR_ABRTACPTDIS) == 0)
1.41 mycroft 705: error = (*so->so_proto->pr_usrreq)(so, PRU_ACCEPT,
1.111.2.7 yamt 706: NULL, nam, NULL, NULL);
1.41 mycroft 707: else
1.53 itojun 708: error = ECONNABORTED;
1.52 itojun 709:
1.1 cgd 710: splx(s);
711: return (error);
712: }
713:
1.3 andrew 714: int
1.111.2.3 yamt 715: soconnect(struct socket *so, struct mbuf *nam, struct lwp *l)
1.1 cgd 716: {
1.54 lukem 717: int s, error;
1.1 cgd 718:
719: if (so->so_options & SO_ACCEPTCONN)
720: return (EOPNOTSUPP);
1.20 mycroft 721: s = splsoftnet();
1.1 cgd 722: /*
723: * If protocol is connection-based, can only connect once.
724: * Otherwise, if connected, try to disconnect first.
725: * This allows user to disconnect by connecting to, e.g.,
726: * a null address.
727: */
728: if (so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING) &&
729: ((so->so_proto->pr_flags & PR_CONNREQUIRED) ||
730: (error = sodisconnect(so))))
731: error = EISCONN;
732: else
733: error = (*so->so_proto->pr_usrreq)(so, PRU_CONNECT,
1.111.2.7 yamt 734: NULL, nam, NULL, l);
1.1 cgd 735: splx(s);
736: return (error);
737: }
738:
1.3 andrew 739: int
1.54 lukem 740: soconnect2(struct socket *so1, struct socket *so2)
1.1 cgd 741: {
1.54 lukem 742: int s, error;
1.1 cgd 743:
1.54 lukem 744: s = splsoftnet();
1.22 mycroft 745: error = (*so1->so_proto->pr_usrreq)(so1, PRU_CONNECT2,
1.111.2.7 yamt 746: NULL, (struct mbuf *)so2, NULL, NULL);
1.1 cgd 747: splx(s);
748: return (error);
749: }
750:
1.3 andrew 751: int
1.54 lukem 752: sodisconnect(struct socket *so)
1.1 cgd 753: {
1.54 lukem 754: int s, error;
1.1 cgd 755:
1.54 lukem 756: s = splsoftnet();
1.1 cgd 757: if ((so->so_state & SS_ISCONNECTED) == 0) {
758: error = ENOTCONN;
759: goto bad;
760: }
761: if (so->so_state & SS_ISDISCONNECTING) {
762: error = EALREADY;
763: goto bad;
764: }
1.22 mycroft 765: error = (*so->so_proto->pr_usrreq)(so, PRU_DISCONNECT,
1.111.2.7 yamt 766: NULL, NULL, NULL, NULL);
1.54 lukem 767: bad:
1.1 cgd 768: splx(s);
1.111.2.3 yamt 769: sodopendfree();
1.1 cgd 770: return (error);
771: }
772:
1.15 mycroft 773: #define SBLOCKWAIT(f) (((f) & MSG_DONTWAIT) ? M_NOWAIT : M_WAITOK)
1.1 cgd 774: /*
775: * Send on a socket.
776: * If send must go all at once and message is larger than
777: * send buffering, then hard error.
778: * Lock against other senders.
779: * If must go all at once and not enough room now, then
780: * inform user that this would block and do nothing.
781: * Otherwise, if nonblocking, send as much as possible.
782: * The data to be sent is described by "uio" if nonzero,
783: * otherwise by the mbuf chain "top" (which must be null
784: * if uio is not). Data provided in mbuf chain must be small
785: * enough to send all at once.
786: *
787: * Returns nonzero on error, timeout or signal; callers
788: * must check for short counts if EINTR/ERESTART are returned.
789: * Data and control buffers are freed on return.
790: */
1.3 andrew 791: int
1.54 lukem 792: sosend(struct socket *so, struct mbuf *addr, struct uio *uio, struct mbuf *top,
1.111.2.3 yamt 793: struct mbuf *control, int flags, struct lwp *l)
1.1 cgd 794: {
1.54 lukem 795: struct mbuf **mp, *m;
1.111.2.3 yamt 796: struct proc *p;
1.58 jdolecek 797: long space, len, resid, clen, mlen;
798: int error, s, dontroute, atomic;
1.54 lukem 799:
1.111.2.3 yamt 800: p = l->l_proc;
801: sodopendfree();
1.64 thorpej 802:
1.54 lukem 803: clen = 0;
804: atomic = sosendallatonce(so) || top;
1.1 cgd 805: if (uio)
806: resid = uio->uio_resid;
807: else
808: resid = top->m_pkthdr.len;
1.7 cgd 809: /*
810: * In theory resid should be unsigned.
811: * However, space must be signed, as it might be less than 0
812: * if we over-committed, and we must use a signed comparison
813: * of space and resid. On the other hand, a negative resid
814: * causes us to loop sending 0-length segments to the protocol.
815: */
1.29 mycroft 816: if (resid < 0) {
817: error = EINVAL;
818: goto out;
819: }
1.1 cgd 820: dontroute =
821: (flags & MSG_DONTROUTE) && (so->so_options & SO_DONTROUTE) == 0 &&
822: (so->so_proto->pr_flags & PR_ATOMIC);
1.102 jonathan 823: if (p)
824: p->p_stats->p_ru.ru_msgsnd++;
1.1 cgd 825: if (control)
826: clen = control->m_len;
827: #define snderr(errno) { error = errno; splx(s); goto release; }
828:
1.54 lukem 829: restart:
1.21 christos 830: if ((error = sblock(&so->so_snd, SBLOCKWAIT(flags))) != 0)
1.1 cgd 831: goto out;
832: do {
1.20 mycroft 833: s = splsoftnet();
1.1 cgd 834: if (so->so_state & SS_CANTSENDMORE)
835: snderr(EPIPE);
1.48 thorpej 836: if (so->so_error) {
837: error = so->so_error;
838: so->so_error = 0;
839: splx(s);
840: goto release;
841: }
1.1 cgd 842: if ((so->so_state & SS_ISCONNECTED) == 0) {
843: if (so->so_proto->pr_flags & PR_CONNREQUIRED) {
844: if ((so->so_state & SS_ISCONFIRMING) == 0 &&
845: !(resid == 0 && clen != 0))
846: snderr(ENOTCONN);
847: } else if (addr == 0)
848: snderr(EDESTADDRREQ);
849: }
850: space = sbspace(&so->so_snd);
851: if (flags & MSG_OOB)
852: space += 1024;
1.21 christos 853: if ((atomic && resid > so->so_snd.sb_hiwat) ||
1.11 mycroft 854: clen > so->so_snd.sb_hiwat)
855: snderr(EMSGSIZE);
1.96 mycroft 856: if (space < resid + clen &&
1.1 cgd 857: (atomic || space < so->so_snd.sb_lowat || space < clen)) {
1.111.2.12 yamt 858: if (so->so_nbio)
1.1 cgd 859: snderr(EWOULDBLOCK);
860: sbunlock(&so->so_snd);
861: error = sbwait(&so->so_snd);
862: splx(s);
863: if (error)
864: goto out;
865: goto restart;
866: }
867: splx(s);
868: mp = ⊤
869: space -= clen;
870: do {
1.45 tv 871: if (uio == NULL) {
872: /*
873: * Data is prepackaged in "top".
874: */
875: resid = 0;
876: if (flags & MSG_EOR)
877: top->m_flags |= M_EOR;
878: } else do {
1.111.2.8 yamt 879: if (top == NULL) {
1.78 matt 880: m = m_gethdr(M_WAIT, MT_DATA);
1.45 tv 881: mlen = MHLEN;
882: m->m_pkthdr.len = 0;
1.111.2.7 yamt 883: m->m_pkthdr.rcvif = NULL;
1.45 tv 884: } else {
1.78 matt 885: m = m_get(M_WAIT, MT_DATA);
1.45 tv 886: mlen = MLEN;
887: }
1.78 matt 888: MCLAIM(m, so->so_snd.sb_mowner);
1.111.2.3 yamt 889: if (sock_loan_thresh >= 0 &&
890: uio->uio_iov->iov_len >= sock_loan_thresh &&
891: space >= sock_loan_thresh &&
1.64 thorpej 892: (len = sosend_loan(so, uio, m,
893: space)) != 0) {
894: SOSEND_COUNTER_INCR(&sosend_loan_big);
895: space -= len;
896: goto have_data;
897: }
1.45 tv 898: if (resid >= MINCLSIZE && space >= MCLBYTES) {
1.64 thorpej 899: SOSEND_COUNTER_INCR(&sosend_copy_big);
1.78 matt 900: m_clget(m, M_WAIT);
1.45 tv 901: if ((m->m_flags & M_EXT) == 0)
902: goto nopages;
903: mlen = MCLBYTES;
904: if (atomic && top == 0) {
1.58 jdolecek 905: len = lmin(MCLBYTES - max_hdr,
1.54 lukem 906: resid);
1.45 tv 907: m->m_data += max_hdr;
908: } else
1.58 jdolecek 909: len = lmin(MCLBYTES, resid);
1.45 tv 910: space -= len;
911: } else {
1.64 thorpej 912: nopages:
913: SOSEND_COUNTER_INCR(&sosend_copy_small);
1.58 jdolecek 914: len = lmin(lmin(mlen, resid), space);
1.45 tv 915: space -= len;
916: /*
917: * For datagram protocols, leave room
918: * for protocol headers in first mbuf.
919: */
920: if (atomic && top == 0 && len < mlen)
921: MH_ALIGN(m, len);
922: }
1.111.2.8 yamt 923: error = uiomove(mtod(m, void *), (int)len, uio);
1.64 thorpej 924: have_data:
1.45 tv 925: resid = uio->uio_resid;
926: m->m_len = len;
927: *mp = m;
928: top->m_pkthdr.len += len;
1.111.2.8 yamt 929: if (error != 0)
1.45 tv 930: goto release;
931: mp = &m->m_next;
932: if (resid <= 0) {
933: if (flags & MSG_EOR)
934: top->m_flags |= M_EOR;
935: break;
936: }
937: } while (space > 0 && atomic);
1.108 perry 938:
1.46 sommerfe 939: s = splsoftnet();
940:
941: if (so->so_state & SS_CANTSENDMORE)
942: snderr(EPIPE);
1.45 tv 943:
944: if (dontroute)
945: so->so_options |= SO_DONTROUTE;
946: if (resid > 0)
947: so->so_state |= SS_MORETOCOME;
1.46 sommerfe 948: error = (*so->so_proto->pr_usrreq)(so,
949: (flags & MSG_OOB) ? PRU_SENDOOB : PRU_SEND,
1.111.2.3 yamt 950: top, addr, control, curlwp); /* XXX */
1.45 tv 951: if (dontroute)
952: so->so_options &= ~SO_DONTROUTE;
953: if (resid > 0)
954: so->so_state &= ~SS_MORETOCOME;
1.46 sommerfe 955: splx(s);
956:
1.45 tv 957: clen = 0;
1.111.2.8 yamt 958: control = NULL;
959: top = NULL;
1.45 tv 960: mp = ⊤
1.111.2.8 yamt 961: if (error != 0)
1.1 cgd 962: goto release;
963: } while (resid && space > 0);
964: } while (resid);
965:
1.54 lukem 966: release:
1.1 cgd 967: sbunlock(&so->so_snd);
1.54 lukem 968: out:
1.1 cgd 969: if (top)
970: m_freem(top);
971: if (control)
972: m_freem(control);
973: return (error);
974: }
975:
976: /*
977: * Implement receive operations on a socket.
978: * We depend on the way that records are added to the sockbuf
979: * by sbappend*. In particular, each record (mbufs linked through m_next)
980: * must begin with an address if the protocol so specifies,
981: * followed by an optional mbuf or mbufs containing ancillary data,
982: * and then zero or more mbufs of data.
983: * In order to avoid blocking network interrupts for the entire time here,
984: * we splx() while doing the actual copy to user space.
985: * Although the sockbuf is locked, new data may still be appended,
986: * and thus we must maintain consistency of the sockbuf during that time.
987: *
988: * The caller may receive the data as a single mbuf chain by supplying
989: * an mbuf **mp0 for use in returning the chain. The uio is then used
990: * only for the count in uio_resid.
991: */
1.3 andrew 992: int
1.54 lukem 993: soreceive(struct socket *so, struct mbuf **paddr, struct uio *uio,
994: struct mbuf **mp0, struct mbuf **controlp, int *flagsp)
1.1 cgd 995: {
1.111.2.3 yamt 996: struct lwp *l = curlwp;
1.54 lukem 997: struct mbuf *m, **mp;
1.111.2.10 yamt 998: int atomic, flags, len, error, s, offset, moff, type, orig_resid;
1.99 matt 999: const struct protosw *pr;
1.54 lukem 1000: struct mbuf *nextrecord;
1.67 he 1001: int mbuf_removed = 0;
1.111.2.10 yamt 1002: const struct domain *dom;
1.64 thorpej 1003:
1.54 lukem 1004: pr = so->so_proto;
1.111.2.10 yamt 1005: atomic = pr->pr_flags & PR_ATOMIC;
1006: dom = pr->pr_domain;
1.1 cgd 1007: mp = mp0;
1.54 lukem 1008: type = 0;
1009: orig_resid = uio->uio_resid;
1.102 jonathan 1010:
1.111.2.8 yamt 1011: if (paddr != NULL)
1012: *paddr = NULL;
1013: if (controlp != NULL)
1014: *controlp = NULL;
1015: if (flagsp != NULL)
1.1 cgd 1016: flags = *flagsp &~ MSG_EOR;
1017: else
1018: flags = 0;
1.66 enami 1019:
1020: if ((flags & MSG_DONTWAIT) == 0)
1.111.2.3 yamt 1021: sodopendfree();
1.66 enami 1022:
1.1 cgd 1023: if (flags & MSG_OOB) {
1024: m = m_get(M_WAIT, MT_DATA);
1.17 cgd 1025: error = (*pr->pr_usrreq)(so, PRU_RCVOOB, m,
1.111.2.7 yamt 1026: (struct mbuf *)(long)(flags & MSG_PEEK), NULL, l);
1.1 cgd 1027: if (error)
1028: goto bad;
1029: do {
1.111.2.7 yamt 1030: error = uiomove(mtod(m, void *),
1.1 cgd 1031: (int) min(uio->uio_resid, m->m_len), uio);
1032: m = m_free(m);
1.111.2.8 yamt 1033: } while (uio->uio_resid > 0 && error == 0 && m);
1.54 lukem 1034: bad:
1.111.2.8 yamt 1035: if (m != NULL)
1.1 cgd 1036: m_freem(m);
1.111.2.8 yamt 1037: return error;
1.1 cgd 1038: }
1.111.2.8 yamt 1039: if (mp != NULL)
1.111.2.7 yamt 1040: *mp = NULL;
1.1 cgd 1041: if (so->so_state & SS_ISCONFIRMING && uio->uio_resid)
1.111.2.7 yamt 1042: (*pr->pr_usrreq)(so, PRU_RCVD, NULL, NULL, NULL, l);
1.1 cgd 1043:
1.54 lukem 1044: restart:
1.21 christos 1045: if ((error = sblock(&so->so_rcv, SBLOCKWAIT(flags))) != 0)
1.111.2.8 yamt 1046: return error;
1.20 mycroft 1047: s = splsoftnet();
1.1 cgd 1048:
1049: m = so->so_rcv.sb_mb;
1050: /*
1051: * If we have less data than requested, block awaiting more
1052: * (subject to any timeout) if:
1.15 mycroft 1053: * 1. the current count is less than the low water mark,
1.1 cgd 1054: * 2. MSG_WAITALL is set, and it is possible to do the entire
1.15 mycroft 1055: * receive operation at once if we block (resid <= hiwat), or
1056: * 3. MSG_DONTWAIT is not set.
1.1 cgd 1057: * If MSG_WAITALL is set but resid is larger than the receive buffer,
1058: * we have to do the receive in sections, and thus risk returning
1059: * a short count if a timeout or signal occurs after we start.
1060: */
1.111.2.8 yamt 1061: if (m == NULL ||
1062: ((flags & MSG_DONTWAIT) == 0 &&
1063: so->so_rcv.sb_cc < uio->uio_resid &&
1064: (so->so_rcv.sb_cc < so->so_rcv.sb_lowat ||
1065: ((flags & MSG_WAITALL) &&
1066: uio->uio_resid <= so->so_rcv.sb_hiwat)) &&
1.111.2.10 yamt 1067: m->m_nextpkt == NULL && !atomic)) {
1.1 cgd 1068: #ifdef DIAGNOSTIC
1.111.2.8 yamt 1069: if (m == NULL && so->so_rcv.sb_cc)
1.1 cgd 1070: panic("receive 1");
1071: #endif
1072: if (so->so_error) {
1.111.2.8 yamt 1073: if (m != NULL)
1.15 mycroft 1074: goto dontblock;
1.1 cgd 1075: error = so->so_error;
1076: if ((flags & MSG_PEEK) == 0)
1077: so->so_error = 0;
1078: goto release;
1079: }
1080: if (so->so_state & SS_CANTRCVMORE) {
1.111.2.8 yamt 1081: if (m != NULL)
1.15 mycroft 1082: goto dontblock;
1.1 cgd 1083: else
1084: goto release;
1085: }
1.111.2.8 yamt 1086: for (; m != NULL; m = m->m_next)
1.1 cgd 1087: if (m->m_type == MT_OOBDATA || (m->m_flags & M_EOR)) {
1088: m = so->so_rcv.sb_mb;
1089: goto dontblock;
1090: }
1091: if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) == 0 &&
1092: (so->so_proto->pr_flags & PR_CONNREQUIRED)) {
1093: error = ENOTCONN;
1094: goto release;
1095: }
1096: if (uio->uio_resid == 0)
1097: goto release;
1.111.2.12 yamt 1098: if (so->so_nbio || (flags & MSG_DONTWAIT)) {
1.1 cgd 1099: error = EWOULDBLOCK;
1100: goto release;
1101: }
1.69 thorpej 1102: SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 1");
1103: SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 1");
1.1 cgd 1104: sbunlock(&so->so_rcv);
1105: error = sbwait(&so->so_rcv);
1106: splx(s);
1.111.2.8 yamt 1107: if (error != 0)
1108: return error;
1.1 cgd 1109: goto restart;
1110: }
1.54 lukem 1111: dontblock:
1.69 thorpej 1112: /*
1113: * On entry here, m points to the first record of the socket buffer.
1114: * While we process the initial mbufs containing address and control
1115: * info, we save a copy of m->m_nextpkt into nextrecord.
1116: */
1.111.2.8 yamt 1117: if (l != NULL)
1.111.2.3 yamt 1118: l->l_proc->p_stats->p_ru.ru_msgrcv++;
1.69 thorpej 1119: KASSERT(m == so->so_rcv.sb_mb);
1120: SBLASTRECORDCHK(&so->so_rcv, "soreceive 1");
1121: SBLASTMBUFCHK(&so->so_rcv, "soreceive 1");
1.1 cgd 1122: nextrecord = m->m_nextpkt;
1123: if (pr->pr_flags & PR_ADDR) {
1124: #ifdef DIAGNOSTIC
1125: if (m->m_type != MT_SONAME)
1126: panic("receive 1a");
1127: #endif
1.3 andrew 1128: orig_resid = 0;
1.1 cgd 1129: if (flags & MSG_PEEK) {
1130: if (paddr)
1131: *paddr = m_copy(m, 0, m->m_len);
1132: m = m->m_next;
1133: } else {
1134: sbfree(&so->so_rcv, m);
1.67 he 1135: mbuf_removed = 1;
1.111.2.8 yamt 1136: if (paddr != NULL) {
1.1 cgd 1137: *paddr = m;
1138: so->so_rcv.sb_mb = m->m_next;
1.111.2.8 yamt 1139: m->m_next = NULL;
1.1 cgd 1140: m = so->so_rcv.sb_mb;
1141: } else {
1142: MFREE(m, so->so_rcv.sb_mb);
1143: m = so->so_rcv.sb_mb;
1144: }
1145: }
1146: }
1.111.2.8 yamt 1147: while (m != NULL && m->m_type == MT_CONTROL && error == 0) {
1.1 cgd 1148: if (flags & MSG_PEEK) {
1.111.2.8 yamt 1149: if (controlp != NULL)
1.1 cgd 1150: *controlp = m_copy(m, 0, m->m_len);
1151: m = m->m_next;
1152: } else {
1153: sbfree(&so->so_rcv, m);
1.67 he 1154: mbuf_removed = 1;
1.111.2.8 yamt 1155: if (controlp != NULL) {
1.111.2.3 yamt 1156: if (dom->dom_externalize && l &&
1.1 cgd 1157: mtod(m, struct cmsghdr *)->cmsg_type ==
1158: SCM_RIGHTS)
1.111.2.3 yamt 1159: error = (*dom->dom_externalize)(m, l);
1.1 cgd 1160: *controlp = m;
1161: so->so_rcv.sb_mb = m->m_next;
1.111.2.8 yamt 1162: m->m_next = NULL;
1.1 cgd 1163: m = so->so_rcv.sb_mb;
1164: } else {
1.106 itojun 1165: /*
1166: * Dispose of any SCM_RIGHTS message that went
1167: * through the read path rather than recv.
1168: */
1.111.2.10 yamt 1169: if (dom->dom_dispose &&
1.106 itojun 1170: mtod(m, struct cmsghdr *)->cmsg_type == SCM_RIGHTS)
1.111.2.10 yamt 1171: (*dom->dom_dispose)(m);
1.1 cgd 1172: MFREE(m, so->so_rcv.sb_mb);
1173: m = so->so_rcv.sb_mb;
1174: }
1175: }
1.111.2.8 yamt 1176: if (controlp != NULL) {
1.3 andrew 1177: orig_resid = 0;
1.1 cgd 1178: controlp = &(*controlp)->m_next;
1.3 andrew 1179: }
1.1 cgd 1180: }
1.69 thorpej 1181:
1182: /*
1183: * If m is non-NULL, we have some data to read. From now on,
1184: * make sure to keep sb_lastrecord consistent when working on
1185: * the last packet on the chain (nextrecord == NULL) and we
1186: * change m->m_nextpkt.
1187: */
1.111.2.8 yamt 1188: if (m != NULL) {
1.69 thorpej 1189: if ((flags & MSG_PEEK) == 0) {
1.1 cgd 1190: m->m_nextpkt = nextrecord;
1.69 thorpej 1191: /*
1192: * If nextrecord == NULL (this is a single chain),
1193: * then sb_lastrecord may not be valid here if m
1194: * was changed earlier.
1195: */
1196: if (nextrecord == NULL) {
1197: KASSERT(so->so_rcv.sb_mb == m);
1198: so->so_rcv.sb_lastrecord = m;
1199: }
1200: }
1.1 cgd 1201: type = m->m_type;
1202: if (type == MT_OOBDATA)
1203: flags |= MSG_OOB;
1.69 thorpej 1204: } else {
1205: if ((flags & MSG_PEEK) == 0) {
1206: KASSERT(so->so_rcv.sb_mb == m);
1207: so->so_rcv.sb_mb = nextrecord;
1.70 thorpej 1208: SB_EMPTY_FIXUP(&so->so_rcv);
1.69 thorpej 1209: }
1.1 cgd 1210: }
1.69 thorpej 1211: SBLASTRECORDCHK(&so->so_rcv, "soreceive 2");
1212: SBLASTMBUFCHK(&so->so_rcv, "soreceive 2");
1213:
1.1 cgd 1214: moff = 0;
1215: offset = 0;
1.111.2.8 yamt 1216: while (m != NULL && uio->uio_resid > 0 && error == 0) {
1.1 cgd 1217: if (m->m_type == MT_OOBDATA) {
1218: if (type != MT_OOBDATA)
1219: break;
1220: } else if (type == MT_OOBDATA)
1221: break;
1222: #ifdef DIAGNOSTIC
1223: else if (m->m_type != MT_DATA && m->m_type != MT_HEADER)
1224: panic("receive 3");
1225: #endif
1226: so->so_state &= ~SS_RCVATMARK;
1227: len = uio->uio_resid;
1228: if (so->so_oobmark && len > so->so_oobmark - offset)
1229: len = so->so_oobmark - offset;
1230: if (len > m->m_len - moff)
1231: len = m->m_len - moff;
1232: /*
1233: * If mp is set, just pass back the mbufs.
1234: * Otherwise copy them out via the uio, then free.
1235: * Sockbuf must be consistent here (points to current mbuf,
1236: * it points to next record) when we drop priority;
1237: * we must note any additions to the sockbuf when we
1238: * block interrupts again.
1239: */
1.111.2.8 yamt 1240: if (mp == NULL) {
1.69 thorpej 1241: SBLASTRECORDCHK(&so->so_rcv, "soreceive uiomove");
1242: SBLASTMBUFCHK(&so->so_rcv, "soreceive uiomove");
1.1 cgd 1243: splx(s);
1.111.2.7 yamt 1244: error = uiomove(mtod(m, char *) + moff, (int)len, uio);
1.20 mycroft 1245: s = splsoftnet();
1.111.2.8 yamt 1246: if (error != 0) {
1.67 he 1247: /*
1248: * If any part of the record has been removed
1249: * (such as the MT_SONAME mbuf, which will
1250: * happen when PR_ADDR, and thus also
1251: * PR_ATOMIC, is set), then drop the entire
1252: * record to maintain the atomicity of the
1253: * receive operation.
1254: *
1255: * This avoids a later panic("receive 1a")
1256: * when compiled with DIAGNOSTIC.
1257: */
1.111.2.10 yamt 1258: if (m && mbuf_removed && atomic)
1.67 he 1259: (void) sbdroprecord(&so->so_rcv);
1260:
1.57 jdolecek 1261: goto release;
1.67 he 1262: }
1.1 cgd 1263: } else
1264: uio->uio_resid -= len;
1265: if (len == m->m_len - moff) {
1266: if (m->m_flags & M_EOR)
1267: flags |= MSG_EOR;
1268: if (flags & MSG_PEEK) {
1269: m = m->m_next;
1270: moff = 0;
1271: } else {
1272: nextrecord = m->m_nextpkt;
1273: sbfree(&so->so_rcv, m);
1274: if (mp) {
1275: *mp = m;
1276: mp = &m->m_next;
1277: so->so_rcv.sb_mb = m = m->m_next;
1.111.2.7 yamt 1278: *mp = NULL;
1.1 cgd 1279: } else {
1280: MFREE(m, so->so_rcv.sb_mb);
1281: m = so->so_rcv.sb_mb;
1282: }
1.69 thorpej 1283: /*
1284: * If m != NULL, we also know that
1285: * so->so_rcv.sb_mb != NULL.
1286: */
1287: KASSERT(so->so_rcv.sb_mb == m);
1288: if (m) {
1.1 cgd 1289: m->m_nextpkt = nextrecord;
1.69 thorpej 1290: if (nextrecord == NULL)
1291: so->so_rcv.sb_lastrecord = m;
1292: } else {
1293: so->so_rcv.sb_mb = nextrecord;
1.70 thorpej 1294: SB_EMPTY_FIXUP(&so->so_rcv);
1.69 thorpej 1295: }
1296: SBLASTRECORDCHK(&so->so_rcv, "soreceive 3");
1297: SBLASTMBUFCHK(&so->so_rcv, "soreceive 3");
1.1 cgd 1298: }
1.111.2.8 yamt 1299: } else if (flags & MSG_PEEK)
1300: moff += len;
1301: else {
1302: if (mp != NULL)
1303: *mp = m_copym(m, 0, len, M_WAIT);
1304: m->m_data += len;
1305: m->m_len -= len;
1306: so->so_rcv.sb_cc -= len;
1.1 cgd 1307: }
1308: if (so->so_oobmark) {
1309: if ((flags & MSG_PEEK) == 0) {
1310: so->so_oobmark -= len;
1311: if (so->so_oobmark == 0) {
1312: so->so_state |= SS_RCVATMARK;
1313: break;
1314: }
1.7 cgd 1315: } else {
1.1 cgd 1316: offset += len;
1.7 cgd 1317: if (offset == so->so_oobmark)
1318: break;
1319: }
1.1 cgd 1320: }
1321: if (flags & MSG_EOR)
1322: break;
1323: /*
1324: * If the MSG_WAITALL flag is set (for non-atomic socket),
1325: * we must not quit until "uio->uio_resid == 0" or an error
1326: * termination. If a signal/timeout occurs, return
1327: * with a short count but without error.
1328: * Keep sockbuf locked against other readers.
1329: */
1.111.2.8 yamt 1330: while (flags & MSG_WAITALL && m == NULL && uio->uio_resid > 0 &&
1.3 andrew 1331: !sosendallatonce(so) && !nextrecord) {
1.1 cgd 1332: if (so->so_error || so->so_state & SS_CANTRCVMORE)
1333: break;
1.68 matt 1334: /*
1335: * If we are peeking and the socket receive buffer is
1336: * full, stop since we can't get more data to peek at.
1337: */
1338: if ((flags & MSG_PEEK) && sbspace(&so->so_rcv) <= 0)
1339: break;
1340: /*
1341: * If we've drained the socket buffer, tell the
1342: * protocol in case it needs to do something to
1343: * get it filled again.
1344: */
1345: if ((pr->pr_flags & PR_WANTRCVD) && so->so_pcb)
1346: (*pr->pr_usrreq)(so, PRU_RCVD,
1.111.2.7 yamt 1347: NULL, (struct mbuf *)(long)flags, NULL, l);
1.69 thorpej 1348: SBLASTRECORDCHK(&so->so_rcv, "soreceive sbwait 2");
1349: SBLASTMBUFCHK(&so->so_rcv, "soreceive sbwait 2");
1.1 cgd 1350: error = sbwait(&so->so_rcv);
1.111.2.8 yamt 1351: if (error != 0) {
1.1 cgd 1352: sbunlock(&so->so_rcv);
1353: splx(s);
1.111.2.8 yamt 1354: return 0;
1.1 cgd 1355: }
1.21 christos 1356: if ((m = so->so_rcv.sb_mb) != NULL)
1.1 cgd 1357: nextrecord = m->m_nextpkt;
1358: }
1359: }
1.3 andrew 1360:
1.111.2.10 yamt 1361: if (m && atomic) {
1.3 andrew 1362: flags |= MSG_TRUNC;
1363: if ((flags & MSG_PEEK) == 0)
1364: (void) sbdroprecord(&so->so_rcv);
1365: }
1.1 cgd 1366: if ((flags & MSG_PEEK) == 0) {
1.111.2.8 yamt 1367: if (m == NULL) {
1.69 thorpej 1368: /*
1.70 thorpej 1369: * First part is an inline SB_EMPTY_FIXUP(). Second
1.69 thorpej 1370: * part makes sure sb_lastrecord is up-to-date if
1371: * there is still data in the socket buffer.
1372: */
1.1 cgd 1373: so->so_rcv.sb_mb = nextrecord;
1.69 thorpej 1374: if (so->so_rcv.sb_mb == NULL) {
1375: so->so_rcv.sb_mbtail = NULL;
1376: so->so_rcv.sb_lastrecord = NULL;
1377: } else if (nextrecord->m_nextpkt == NULL)
1378: so->so_rcv.sb_lastrecord = nextrecord;
1379: }
1380: SBLASTRECORDCHK(&so->so_rcv, "soreceive 4");
1381: SBLASTMBUFCHK(&so->so_rcv, "soreceive 4");
1.1 cgd 1382: if (pr->pr_flags & PR_WANTRCVD && so->so_pcb)
1.111.2.7 yamt 1383: (*pr->pr_usrreq)(so, PRU_RCVD, NULL,
1384: (struct mbuf *)(long)flags, NULL, l);
1.1 cgd 1385: }
1.3 andrew 1386: if (orig_resid == uio->uio_resid && orig_resid &&
1387: (flags & MSG_EOR) == 0 && (so->so_state & SS_CANTRCVMORE) == 0) {
1388: sbunlock(&so->so_rcv);
1389: splx(s);
1390: goto restart;
1391: }
1.108 perry 1392:
1.111.2.8 yamt 1393: if (flagsp != NULL)
1.1 cgd 1394: *flagsp |= flags;
1.54 lukem 1395: release:
1.1 cgd 1396: sbunlock(&so->so_rcv);
1397: splx(s);
1.111.2.8 yamt 1398: return error;
1.1 cgd 1399: }
1400:
1.14 mycroft 1401: int
1.54 lukem 1402: soshutdown(struct socket *so, int how)
1.1 cgd 1403: {
1.99 matt 1404: const struct protosw *pr;
1.34 kleink 1405:
1.54 lukem 1406: pr = so->so_proto;
1.34 kleink 1407: if (!(how == SHUT_RD || how == SHUT_WR || how == SHUT_RDWR))
1408: return (EINVAL);
1.1 cgd 1409:
1.34 kleink 1410: if (how == SHUT_RD || how == SHUT_RDWR)
1.1 cgd 1411: sorflush(so);
1.34 kleink 1412: if (how == SHUT_WR || how == SHUT_RDWR)
1.111.2.7 yamt 1413: return (*pr->pr_usrreq)(so, PRU_SHUTDOWN, NULL,
1414: NULL, NULL, NULL);
1.111.2.8 yamt 1415: return 0;
1.1 cgd 1416: }
1417:
1.14 mycroft 1418: void
1.54 lukem 1419: sorflush(struct socket *so)
1.1 cgd 1420: {
1.54 lukem 1421: struct sockbuf *sb, asb;
1.99 matt 1422: const struct protosw *pr;
1.54 lukem 1423: int s;
1.1 cgd 1424:
1.54 lukem 1425: sb = &so->so_rcv;
1426: pr = so->so_proto;
1.1 cgd 1427: sb->sb_flags |= SB_NOINTR;
1.15 mycroft 1428: (void) sblock(sb, M_WAITOK);
1.56 thorpej 1429: s = splnet();
1.1 cgd 1430: socantrcvmore(so);
1431: sbunlock(sb);
1432: asb = *sb;
1.86 wrstuden 1433: /*
1434: * Clear most of the sockbuf structure, but leave some of the
1435: * fields valid.
1436: */
1437: memset(&sb->sb_startzero, 0,
1438: sizeof(*sb) - offsetof(struct sockbuf, sb_startzero));
1.1 cgd 1439: splx(s);
1440: if (pr->pr_flags & PR_RIGHTS && pr->pr_domain->dom_dispose)
1441: (*pr->pr_domain->dom_dispose)(asb.sb_mb);
1.98 christos 1442: sbrelease(&asb, so);
1.1 cgd 1443: }
1444:
1.111.2.8 yamt 1445: static int
1446: sosetopt1(struct socket *so, int level, int optname, struct mbuf *m)
1.1 cgd 1447: {
1.111.2.8 yamt 1448: int optval, val;
1.111.2.5 yamt 1449: struct linger *l;
1.111.2.7 yamt 1450: struct sockbuf *sb;
1.111.2.8 yamt 1451: struct timeval *tv;
1.1 cgd 1452:
1.111.2.8 yamt 1453: switch (optname) {
1.1 cgd 1454:
1.111.2.8 yamt 1455: case SO_LINGER:
1456: if (m == NULL || m->m_len != sizeof(struct linger))
1457: return EINVAL;
1458: l = mtod(m, struct linger *);
1459: if (l->l_linger < 0 || l->l_linger > USHRT_MAX ||
1460: l->l_linger > (INT_MAX / hz))
1461: return EDOM;
1462: so->so_linger = l->l_linger;
1463: if (l->l_onoff)
1464: so->so_options |= SO_LINGER;
1465: else
1466: so->so_options &= ~SO_LINGER;
1467: break;
1.1 cgd 1468:
1.111.2.8 yamt 1469: case SO_DEBUG:
1470: case SO_KEEPALIVE:
1471: case SO_DONTROUTE:
1472: case SO_USELOOPBACK:
1473: case SO_BROADCAST:
1474: case SO_REUSEADDR:
1475: case SO_REUSEPORT:
1476: case SO_OOBINLINE:
1477: case SO_TIMESTAMP:
1478: if (m == NULL || m->m_len < sizeof(int))
1479: return EINVAL;
1480: if (*mtod(m, int *))
1481: so->so_options |= optname;
1482: else
1483: so->so_options &= ~optname;
1484: break;
1485:
1486: case SO_SNDBUF:
1487: case SO_RCVBUF:
1488: case SO_SNDLOWAT:
1489: case SO_RCVLOWAT:
1490: if (m == NULL || m->m_len < sizeof(int))
1491: return EINVAL;
1492:
1493: /*
1494: * Values < 1 make no sense for any of these
1495: * options, so disallow them.
1496: */
1497: optval = *mtod(m, int *);
1498: if (optval < 1)
1499: return EINVAL;
1500:
1501: switch (optname) {
1.1 cgd 1502:
1503: case SO_SNDBUF:
1504: case SO_RCVBUF:
1.111.2.8 yamt 1505: sb = (optname == SO_SNDBUF) ?
1506: &so->so_snd : &so->so_rcv;
1507: if (sbreserve(sb, (u_long)optval, so) == 0)
1508: return ENOBUFS;
1509: sb->sb_flags &= ~SB_AUTOSIZE;
1510: break;
1511:
1512: /*
1513: * Make sure the low-water is never greater than
1514: * the high-water.
1515: */
1.1 cgd 1516: case SO_SNDLOWAT:
1.111.2.8 yamt 1517: so->so_snd.sb_lowat =
1518: (optval > so->so_snd.sb_hiwat) ?
1519: so->so_snd.sb_hiwat : optval;
1520: break;
1.1 cgd 1521: case SO_RCVLOWAT:
1.111.2.8 yamt 1522: so->so_rcv.sb_lowat =
1523: (optval > so->so_rcv.sb_hiwat) ?
1524: so->so_rcv.sb_hiwat : optval;
1525: break;
1526: }
1527: break;
1.28 thorpej 1528:
1.111.2.8 yamt 1529: case SO_SNDTIMEO:
1530: case SO_RCVTIMEO:
1531: if (m == NULL || m->m_len < sizeof(*tv))
1532: return EINVAL;
1533: tv = mtod(m, struct timeval *);
1534: if (tv->tv_sec > (INT_MAX - tv->tv_usec / tick) / hz)
1535: return EDOM;
1536: val = tv->tv_sec * hz + tv->tv_usec / tick;
1537: if (val == 0 && tv->tv_usec != 0)
1538: val = 1;
1.1 cgd 1539:
1.111.2.8 yamt 1540: switch (optname) {
1.1 cgd 1541:
1542: case SO_SNDTIMEO:
1.111.2.8 yamt 1543: so->so_snd.sb_timeo = val;
1544: break;
1.1 cgd 1545: case SO_RCVTIMEO:
1.111.2.8 yamt 1546: so->so_rcv.sb_timeo = val;
1547: break;
1548: }
1549: break;
1.1 cgd 1550:
1.111.2.8 yamt 1551: default:
1552: return ENOPROTOOPT;
1553: }
1554: return 0;
1555: }
1.1 cgd 1556:
1.111.2.8 yamt 1557: int
1558: sosetopt(struct socket *so, int level, int optname, struct mbuf *m)
1559: {
1560: int error, prerr;
1.1 cgd 1561:
1.111.2.8 yamt 1562: if (level == SOL_SOCKET)
1563: error = sosetopt1(so, level, optname, m);
1564: else
1565: error = ENOPROTOOPT;
1.1 cgd 1566:
1.111.2.8 yamt 1567: if ((error == 0 || error == ENOPROTOOPT) &&
1568: so->so_proto != NULL && so->so_proto->pr_ctloutput != NULL) {
1569: /* give the protocol stack a shot */
1570: prerr = (*so->so_proto->pr_ctloutput)(PRCO_SETOPT, so, level,
1571: optname, &m);
1572: if (prerr == 0)
1573: error = 0;
1574: else if (prerr != ENOPROTOOPT)
1575: error = prerr;
1576: } else if (m != NULL)
1577: (void)m_free(m);
1578: return error;
1.1 cgd 1579: }
1580:
1.14 mycroft 1581: int
1.54 lukem 1582: sogetopt(struct socket *so, int level, int optname, struct mbuf **mp)
1.1 cgd 1583: {
1.54 lukem 1584: struct mbuf *m;
1.1 cgd 1585:
1586: if (level != SOL_SOCKET) {
1587: if (so->so_proto && so->so_proto->pr_ctloutput) {
1588: return ((*so->so_proto->pr_ctloutput)
1589: (PRCO_GETOPT, so, level, optname, mp));
1590: } else
1591: return (ENOPROTOOPT);
1592: } else {
1593: m = m_get(M_WAIT, MT_SOOPTS);
1.36 perry 1594: m->m_len = sizeof(int);
1.1 cgd 1595:
1596: switch (optname) {
1597:
1598: case SO_LINGER:
1.36 perry 1599: m->m_len = sizeof(struct linger);
1.1 cgd 1600: mtod(m, struct linger *)->l_onoff =
1.111.2.5 yamt 1601: (so->so_options & SO_LINGER) ? 1 : 0;
1.1 cgd 1602: mtod(m, struct linger *)->l_linger = so->so_linger;
1603: break;
1604:
1605: case SO_USELOOPBACK:
1606: case SO_DONTROUTE:
1607: case SO_DEBUG:
1608: case SO_KEEPALIVE:
1609: case SO_REUSEADDR:
1.15 mycroft 1610: case SO_REUSEPORT:
1.1 cgd 1611: case SO_BROADCAST:
1612: case SO_OOBINLINE:
1.26 thorpej 1613: case SO_TIMESTAMP:
1.111.2.5 yamt 1614: *mtod(m, int *) = (so->so_options & optname) ? 1 : 0;
1.1 cgd 1615: break;
1616:
1617: case SO_TYPE:
1618: *mtod(m, int *) = so->so_type;
1619: break;
1620:
1621: case SO_ERROR:
1622: *mtod(m, int *) = so->so_error;
1623: so->so_error = 0;
1624: break;
1625:
1626: case SO_SNDBUF:
1627: *mtod(m, int *) = so->so_snd.sb_hiwat;
1628: break;
1629:
1630: case SO_RCVBUF:
1631: *mtod(m, int *) = so->so_rcv.sb_hiwat;
1632: break;
1633:
1634: case SO_SNDLOWAT:
1635: *mtod(m, int *) = so->so_snd.sb_lowat;
1636: break;
1637:
1638: case SO_RCVLOWAT:
1639: *mtod(m, int *) = so->so_rcv.sb_lowat;
1640: break;
1641:
1642: case SO_SNDTIMEO:
1643: case SO_RCVTIMEO:
1644: {
1645: int val = (optname == SO_SNDTIMEO ?
1646: so->so_snd.sb_timeo : so->so_rcv.sb_timeo);
1647:
1648: m->m_len = sizeof(struct timeval);
1649: mtod(m, struct timeval *)->tv_sec = val / hz;
1650: mtod(m, struct timeval *)->tv_usec =
1.27 kleink 1651: (val % hz) * tick;
1.1 cgd 1652: break;
1653: }
1654:
1.107 darrenr 1655: case SO_OVERFLOWED:
1656: *mtod(m, int *) = so->so_rcv.sb_overflowed;
1657: break;
1658:
1.1 cgd 1659: default:
1660: (void)m_free(m);
1661: return (ENOPROTOOPT);
1662: }
1663: *mp = m;
1664: return (0);
1665: }
1666: }
1667:
1.14 mycroft 1668: void
1.54 lukem 1669: sohasoutofband(struct socket *so)
1.1 cgd 1670: {
1.111.2.14! yamt 1671:
1.90 christos 1672: fownsignal(so->so_pgid, SIGURG, POLL_PRI, POLLPRI|POLLRDBAND, so);
1.111.2.14! yamt 1673: selnotify(&so->so_rcv.sb_sel, POLLPRI | POLLRDBAND, 0);
1.1 cgd 1674: }
1.72 jdolecek 1675:
1676: static void
1677: filt_sordetach(struct knote *kn)
1678: {
1679: struct socket *so;
1680:
1681: so = (struct socket *)kn->kn_fp->f_data;
1.73 christos 1682: SLIST_REMOVE(&so->so_rcv.sb_sel.sel_klist, kn, knote, kn_selnext);
1683: if (SLIST_EMPTY(&so->so_rcv.sb_sel.sel_klist))
1.72 jdolecek 1684: so->so_rcv.sb_flags &= ~SB_KNOTE;
1685: }
1686:
1687: /*ARGSUSED*/
1688: static int
1689: filt_soread(struct knote *kn, long hint)
1690: {
1691: struct socket *so;
1692:
1693: so = (struct socket *)kn->kn_fp->f_data;
1694: kn->kn_data = so->so_rcv.sb_cc;
1695: if (so->so_state & SS_CANTRCVMORE) {
1.108 perry 1696: kn->kn_flags |= EV_EOF;
1.72 jdolecek 1697: kn->kn_fflags = so->so_error;
1698: return (1);
1699: }
1700: if (so->so_error) /* temporary udp error */
1701: return (1);
1702: if (kn->kn_sfflags & NOTE_LOWAT)
1703: return (kn->kn_data >= kn->kn_sdata);
1704: return (kn->kn_data >= so->so_rcv.sb_lowat);
1705: }
1706:
1707: static void
1708: filt_sowdetach(struct knote *kn)
1709: {
1710: struct socket *so;
1711:
1712: so = (struct socket *)kn->kn_fp->f_data;
1.73 christos 1713: SLIST_REMOVE(&so->so_snd.sb_sel.sel_klist, kn, knote, kn_selnext);
1714: if (SLIST_EMPTY(&so->so_snd.sb_sel.sel_klist))
1.72 jdolecek 1715: so->so_snd.sb_flags &= ~SB_KNOTE;
1716: }
1717:
1718: /*ARGSUSED*/
1719: static int
1720: filt_sowrite(struct knote *kn, long hint)
1721: {
1722: struct socket *so;
1723:
1724: so = (struct socket *)kn->kn_fp->f_data;
1725: kn->kn_data = sbspace(&so->so_snd);
1726: if (so->so_state & SS_CANTSENDMORE) {
1.108 perry 1727: kn->kn_flags |= EV_EOF;
1.72 jdolecek 1728: kn->kn_fflags = so->so_error;
1729: return (1);
1730: }
1731: if (so->so_error) /* temporary udp error */
1732: return (1);
1733: if (((so->so_state & SS_ISCONNECTED) == 0) &&
1734: (so->so_proto->pr_flags & PR_CONNREQUIRED))
1735: return (0);
1736: if (kn->kn_sfflags & NOTE_LOWAT)
1737: return (kn->kn_data >= kn->kn_sdata);
1738: return (kn->kn_data >= so->so_snd.sb_lowat);
1739: }
1740:
1741: /*ARGSUSED*/
1742: static int
1743: filt_solisten(struct knote *kn, long hint)
1744: {
1745: struct socket *so;
1746:
1747: so = (struct socket *)kn->kn_fp->f_data;
1748:
1749: /*
1750: * Set kn_data to number of incoming connections, not
1751: * counting partial (incomplete) connections.
1.108 perry 1752: */
1.72 jdolecek 1753: kn->kn_data = so->so_qlen;
1754: return (kn->kn_data > 0);
1755: }
1756:
1757: static const struct filterops solisten_filtops =
1758: { 1, NULL, filt_sordetach, filt_solisten };
1759: static const struct filterops soread_filtops =
1760: { 1, NULL, filt_sordetach, filt_soread };
1761: static const struct filterops sowrite_filtops =
1762: { 1, NULL, filt_sowdetach, filt_sowrite };
1763:
1764: int
1765: soo_kqfilter(struct file *fp, struct knote *kn)
1766: {
1767: struct socket *so;
1768: struct sockbuf *sb;
1769:
1770: so = (struct socket *)kn->kn_fp->f_data;
1771: switch (kn->kn_filter) {
1772: case EVFILT_READ:
1773: if (so->so_options & SO_ACCEPTCONN)
1774: kn->kn_fop = &solisten_filtops;
1775: else
1776: kn->kn_fop = &soread_filtops;
1777: sb = &so->so_rcv;
1778: break;
1779: case EVFILT_WRITE:
1780: kn->kn_fop = &sowrite_filtops;
1781: sb = &so->so_snd;
1782: break;
1783: default:
1.111.2.10 yamt 1784: return (EINVAL);
1.72 jdolecek 1785: }
1.73 christos 1786: SLIST_INSERT_HEAD(&sb->sb_sel.sel_klist, kn, kn_selnext);
1.72 jdolecek 1787: sb->sb_flags |= SB_KNOTE;
1788: return (0);
1789: }
1790:
1.94 yamt 1791: #include <sys/sysctl.h>
1792:
1793: static int sysctl_kern_somaxkva(SYSCTLFN_PROTO);
1794:
1795: /*
1796: * sysctl helper routine for kern.somaxkva. ensures that the given
1797: * value is not too small.
1798: * (XXX should we maybe make sure it's not too large as well?)
1799: */
1800: static int
1801: sysctl_kern_somaxkva(SYSCTLFN_ARGS)
1802: {
1803: int error, new_somaxkva;
1804: struct sysctlnode node;
1805:
1806: new_somaxkva = somaxkva;
1807: node = *rnode;
1808: node.sysctl_data = &new_somaxkva;
1809: error = sysctl_lookup(SYSCTLFN_CALL(&node));
1810: if (error || newp == NULL)
1811: return (error);
1812:
1813: if (new_somaxkva < (16 * 1024 * 1024)) /* sanity */
1814: return (EINVAL);
1815:
1.111.2.7 yamt 1816: mutex_enter(&so_pendfree_lock);
1.94 yamt 1817: somaxkva = new_somaxkva;
1.111.2.7 yamt 1818: cv_broadcast(&socurkva_cv);
1819: mutex_exit(&so_pendfree_lock);
1.94 yamt 1820:
1821: return (error);
1822: }
1823:
1824: SYSCTL_SETUP(sysctl_kern_somaxkva_setup, "sysctl kern.somaxkva setup")
1825: {
1826:
1.97 atatat 1827: sysctl_createv(clog, 0, NULL, NULL,
1828: CTLFLAG_PERMANENT,
1829: CTLTYPE_NODE, "kern", NULL,
1830: NULL, 0, NULL, 0,
1831: CTL_KERN, CTL_EOL);
1832:
1833: sysctl_createv(clog, 0, NULL, NULL,
1834: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.103 atatat 1835: CTLTYPE_INT, "somaxkva",
1836: SYSCTL_DESCR("Maximum amount of kernel memory to be "
1837: "used for socket buffers"),
1.94 yamt 1838: sysctl_kern_somaxkva, 0, NULL, 0,
1839: CTL_KERN, KERN_SOMAXKVA, CTL_EOL);
1840: }
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