ng_ksocket.c revision 220768
1/* 2 * ng_ksocket.c 3 */ 4 5/*- 6 * Copyright (c) 1996-1999 Whistle Communications, Inc. 7 * All rights reserved. 8 * 9 * Subject to the following obligations and disclaimer of warranty, use and 10 * redistribution of this software, in source or object code forms, with or 11 * without modifications are expressly permitted by Whistle Communications; 12 * provided, however, that: 13 * 1. Any and all reproductions of the source or object code must include the 14 * copyright notice above and the following disclaimer of warranties; and 15 * 2. No rights are granted, in any manner or form, to use Whistle 16 * Communications, Inc. trademarks, including the mark "WHISTLE 17 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 18 * such appears in the above copyright notice or in the software. 19 * 20 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 21 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 22 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 23 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 25 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 26 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 27 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 28 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 29 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 30 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 31 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 35 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 36 * OF SUCH DAMAGE. 37 * 38 * Author: Archie Cobbs <archie@freebsd.org> 39 * 40 * $FreeBSD: head/sys/netgraph/ng_ksocket.c 220768 2011-04-18 09:12:27Z glebius $ 41 * $Whistle: ng_ksocket.c,v 1.1 1999/11/16 20:04:40 archie Exp $ 42 */ 43 44/* 45 * Kernel socket node type. This node type is basically a kernel-mode 46 * version of a socket... kindof like the reverse of the socket node type. 47 */ 48 49#include <sys/param.h> 50#include <sys/systm.h> 51#include <sys/kernel.h> 52#include <sys/mbuf.h> 53#include <sys/proc.h> 54#include <sys/malloc.h> 55#include <sys/ctype.h> 56#include <sys/protosw.h> 57#include <sys/errno.h> 58#include <sys/socket.h> 59#include <sys/socketvar.h> 60#include <sys/uio.h> 61#include <sys/un.h> 62 63#include <netgraph/ng_message.h> 64#include <netgraph/netgraph.h> 65#include <netgraph/ng_parse.h> 66#include <netgraph/ng_ksocket.h> 67 68#include <netinet/in.h> 69#include <netatalk/at.h> 70 71#ifdef NG_SEPARATE_MALLOC 72MALLOC_DEFINE(M_NETGRAPH_KSOCKET, "netgraph_ksock", "netgraph ksock node "); 73#else 74#define M_NETGRAPH_KSOCKET M_NETGRAPH 75#endif 76 77#define OFFSETOF(s, e) ((char *)&((s *)0)->e - (char *)((s *)0)) 78#define SADATA_OFFSET (OFFSETOF(struct sockaddr, sa_data)) 79 80/* Node private data */ 81struct ng_ksocket_private { 82 node_p node; 83 hook_p hook; 84 struct socket *so; 85 int fn_sent; /* FN call on incoming event was sent */ 86 LIST_HEAD(, ng_ksocket_private) embryos; 87 LIST_ENTRY(ng_ksocket_private) siblings; 88 u_int32_t flags; 89 u_int32_t response_token; 90 ng_ID_t response_addr; 91}; 92typedef struct ng_ksocket_private *priv_p; 93 94/* Flags for priv_p */ 95#define KSF_CONNECTING 0x00000001 /* Waiting for connection complete */ 96#define KSF_ACCEPTING 0x00000002 /* Waiting for accept complete */ 97#define KSF_EOFSEEN 0x00000004 /* Have sent 0-length EOF mbuf */ 98#define KSF_CLONED 0x00000008 /* Cloned from an accepting socket */ 99#define KSF_EMBRYONIC 0x00000010 /* Cloned node with no hooks yet */ 100 101/* Netgraph node methods */ 102static ng_constructor_t ng_ksocket_constructor; 103static ng_rcvmsg_t ng_ksocket_rcvmsg; 104static ng_shutdown_t ng_ksocket_shutdown; 105static ng_newhook_t ng_ksocket_newhook; 106static ng_rcvdata_t ng_ksocket_rcvdata; 107static ng_connect_t ng_ksocket_connect; 108static ng_disconnect_t ng_ksocket_disconnect; 109 110/* Alias structure */ 111struct ng_ksocket_alias { 112 const char *name; 113 const int value; 114 const int family; 115}; 116 117/* Protocol family aliases */ 118static const struct ng_ksocket_alias ng_ksocket_families[] = { 119 { "local", PF_LOCAL }, 120 { "inet", PF_INET }, 121 { "inet6", PF_INET6 }, 122 { "atalk", PF_APPLETALK }, 123 { "ipx", PF_IPX }, 124 { "atm", PF_ATM }, 125 { NULL, -1 }, 126}; 127 128/* Socket type aliases */ 129static const struct ng_ksocket_alias ng_ksocket_types[] = { 130 { "stream", SOCK_STREAM }, 131 { "dgram", SOCK_DGRAM }, 132 { "raw", SOCK_RAW }, 133 { "rdm", SOCK_RDM }, 134 { "seqpacket", SOCK_SEQPACKET }, 135 { NULL, -1 }, 136}; 137 138/* Protocol aliases */ 139static const struct ng_ksocket_alias ng_ksocket_protos[] = { 140 { "ip", IPPROTO_IP, PF_INET }, 141 { "raw", IPPROTO_RAW, PF_INET }, 142 { "icmp", IPPROTO_ICMP, PF_INET }, 143 { "igmp", IPPROTO_IGMP, PF_INET }, 144 { "tcp", IPPROTO_TCP, PF_INET }, 145 { "udp", IPPROTO_UDP, PF_INET }, 146 { "gre", IPPROTO_GRE, PF_INET }, 147 { "esp", IPPROTO_ESP, PF_INET }, 148 { "ah", IPPROTO_AH, PF_INET }, 149 { "swipe", IPPROTO_SWIPE, PF_INET }, 150 { "encap", IPPROTO_ENCAP, PF_INET }, 151 { "divert", IPPROTO_DIVERT, PF_INET }, 152 { "pim", IPPROTO_PIM, PF_INET }, 153 { "ddp", ATPROTO_DDP, PF_APPLETALK }, 154 { "aarp", ATPROTO_AARP, PF_APPLETALK }, 155 { NULL, -1 }, 156}; 157 158/* Helper functions */ 159static int ng_ksocket_check_accept(priv_p); 160static void ng_ksocket_finish_accept(priv_p); 161static int ng_ksocket_incoming(struct socket *so, void *arg, int waitflag); 162static int ng_ksocket_parse(const struct ng_ksocket_alias *aliases, 163 const char *s, int family); 164static void ng_ksocket_incoming2(node_p node, hook_p hook, 165 void *arg1, int arg2); 166 167/************************************************************************ 168 STRUCT SOCKADDR PARSE TYPE 169 ************************************************************************/ 170 171/* Get the length of the data portion of a generic struct sockaddr */ 172static int 173ng_parse_generic_sockdata_getLength(const struct ng_parse_type *type, 174 const u_char *start, const u_char *buf) 175{ 176 const struct sockaddr *sa; 177 178 sa = (const struct sockaddr *)(buf - SADATA_OFFSET); 179 return (sa->sa_len < SADATA_OFFSET) ? 0 : sa->sa_len - SADATA_OFFSET; 180} 181 182/* Type for the variable length data portion of a generic struct sockaddr */ 183static const struct ng_parse_type ng_ksocket_generic_sockdata_type = { 184 &ng_parse_bytearray_type, 185 &ng_parse_generic_sockdata_getLength 186}; 187 188/* Type for a generic struct sockaddr */ 189static const struct ng_parse_struct_field 190 ng_parse_generic_sockaddr_type_fields[] = { 191 { "len", &ng_parse_uint8_type }, 192 { "family", &ng_parse_uint8_type }, 193 { "data", &ng_ksocket_generic_sockdata_type }, 194 { NULL } 195}; 196static const struct ng_parse_type ng_ksocket_generic_sockaddr_type = { 197 &ng_parse_struct_type, 198 &ng_parse_generic_sockaddr_type_fields 199}; 200 201/* Convert a struct sockaddr from ASCII to binary. If its a protocol 202 family that we specially handle, do that, otherwise defer to the 203 generic parse type ng_ksocket_generic_sockaddr_type. */ 204static int 205ng_ksocket_sockaddr_parse(const struct ng_parse_type *type, 206 const char *s, int *off, const u_char *const start, 207 u_char *const buf, int *buflen) 208{ 209 struct sockaddr *const sa = (struct sockaddr *)buf; 210 enum ng_parse_token tok; 211 char fambuf[32]; 212 int family, len; 213 char *t; 214 215 /* If next token is a left curly brace, use generic parse type */ 216 if ((tok = ng_parse_get_token(s, off, &len)) == T_LBRACE) { 217 return (*ng_ksocket_generic_sockaddr_type.supertype->parse) 218 (&ng_ksocket_generic_sockaddr_type, 219 s, off, start, buf, buflen); 220 } 221 222 /* Get socket address family followed by a slash */ 223 while (isspace(s[*off])) 224 (*off)++; 225 if ((t = index(s + *off, '/')) == NULL) 226 return (EINVAL); 227 if ((len = t - (s + *off)) > sizeof(fambuf) - 1) 228 return (EINVAL); 229 strncpy(fambuf, s + *off, len); 230 fambuf[len] = '\0'; 231 *off += len + 1; 232 if ((family = ng_ksocket_parse(ng_ksocket_families, fambuf, 0)) == -1) 233 return (EINVAL); 234 235 /* Set family */ 236 if (*buflen < SADATA_OFFSET) 237 return (ERANGE); 238 sa->sa_family = family; 239 240 /* Set family-specific data and length */ 241 switch (sa->sa_family) { 242 case PF_LOCAL: /* Get pathname */ 243 { 244 const int pathoff = OFFSETOF(struct sockaddr_un, sun_path); 245 struct sockaddr_un *const sun = (struct sockaddr_un *)sa; 246 int toklen, pathlen; 247 char *path; 248 249 if ((path = ng_get_string_token(s, off, &toklen, NULL)) == NULL) 250 return (EINVAL); 251 pathlen = strlen(path); 252 if (pathlen > SOCK_MAXADDRLEN) { 253 free(path, M_NETGRAPH_KSOCKET); 254 return (E2BIG); 255 } 256 if (*buflen < pathoff + pathlen) { 257 free(path, M_NETGRAPH_KSOCKET); 258 return (ERANGE); 259 } 260 *off += toklen; 261 bcopy(path, sun->sun_path, pathlen); 262 sun->sun_len = pathoff + pathlen; 263 free(path, M_NETGRAPH_KSOCKET); 264 break; 265 } 266 267 case PF_INET: /* Get an IP address with optional port */ 268 { 269 struct sockaddr_in *const sin = (struct sockaddr_in *)sa; 270 int i; 271 272 /* Parse this: <ipaddress>[:port] */ 273 for (i = 0; i < 4; i++) { 274 u_long val; 275 char *eptr; 276 277 val = strtoul(s + *off, &eptr, 10); 278 if (val > 0xff || eptr == s + *off) 279 return (EINVAL); 280 *off += (eptr - (s + *off)); 281 ((u_char *)&sin->sin_addr)[i] = (u_char)val; 282 if (i < 3) { 283 if (s[*off] != '.') 284 return (EINVAL); 285 (*off)++; 286 } else if (s[*off] == ':') { 287 (*off)++; 288 val = strtoul(s + *off, &eptr, 10); 289 if (val > 0xffff || eptr == s + *off) 290 return (EINVAL); 291 *off += (eptr - (s + *off)); 292 sin->sin_port = htons(val); 293 } else 294 sin->sin_port = 0; 295 } 296 bzero(&sin->sin_zero, sizeof(sin->sin_zero)); 297 sin->sin_len = sizeof(*sin); 298 break; 299 } 300 301#if 0 302 case PF_APPLETALK: /* XXX implement these someday */ 303 case PF_INET6: 304 case PF_IPX: 305#endif 306 307 default: 308 return (EINVAL); 309 } 310 311 /* Done */ 312 *buflen = sa->sa_len; 313 return (0); 314} 315 316/* Convert a struct sockaddr from binary to ASCII */ 317static int 318ng_ksocket_sockaddr_unparse(const struct ng_parse_type *type, 319 const u_char *data, int *off, char *cbuf, int cbuflen) 320{ 321 const struct sockaddr *sa = (const struct sockaddr *)(data + *off); 322 int slen = 0; 323 324 /* Output socket address, either in special or generic format */ 325 switch (sa->sa_family) { 326 case PF_LOCAL: 327 { 328 const int pathoff = OFFSETOF(struct sockaddr_un, sun_path); 329 const struct sockaddr_un *sun = (const struct sockaddr_un *)sa; 330 const int pathlen = sun->sun_len - pathoff; 331 char pathbuf[SOCK_MAXADDRLEN + 1]; 332 char *pathtoken; 333 334 bcopy(sun->sun_path, pathbuf, pathlen); 335 if ((pathtoken = ng_encode_string(pathbuf, pathlen)) == NULL) 336 return (ENOMEM); 337 slen += snprintf(cbuf, cbuflen, "local/%s", pathtoken); 338 free(pathtoken, M_NETGRAPH_KSOCKET); 339 if (slen >= cbuflen) 340 return (ERANGE); 341 *off += sun->sun_len; 342 return (0); 343 } 344 345 case PF_INET: 346 { 347 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; 348 349 slen += snprintf(cbuf, cbuflen, "inet/%d.%d.%d.%d", 350 ((const u_char *)&sin->sin_addr)[0], 351 ((const u_char *)&sin->sin_addr)[1], 352 ((const u_char *)&sin->sin_addr)[2], 353 ((const u_char *)&sin->sin_addr)[3]); 354 if (sin->sin_port != 0) { 355 slen += snprintf(cbuf + strlen(cbuf), 356 cbuflen - strlen(cbuf), ":%d", 357 (u_int)ntohs(sin->sin_port)); 358 } 359 if (slen >= cbuflen) 360 return (ERANGE); 361 *off += sizeof(*sin); 362 return(0); 363 } 364 365#if 0 366 case PF_APPLETALK: /* XXX implement these someday */ 367 case PF_INET6: 368 case PF_IPX: 369#endif 370 371 default: 372 return (*ng_ksocket_generic_sockaddr_type.supertype->unparse) 373 (&ng_ksocket_generic_sockaddr_type, 374 data, off, cbuf, cbuflen); 375 } 376} 377 378/* Parse type for struct sockaddr */ 379static const struct ng_parse_type ng_ksocket_sockaddr_type = { 380 NULL, 381 NULL, 382 NULL, 383 &ng_ksocket_sockaddr_parse, 384 &ng_ksocket_sockaddr_unparse, 385 NULL /* no such thing as a default struct sockaddr */ 386}; 387 388/************************************************************************ 389 STRUCT NG_KSOCKET_SOCKOPT PARSE TYPE 390 ************************************************************************/ 391 392/* Get length of the struct ng_ksocket_sockopt value field, which is the 393 just the excess of the message argument portion over the length of 394 the struct ng_ksocket_sockopt. */ 395static int 396ng_parse_sockoptval_getLength(const struct ng_parse_type *type, 397 const u_char *start, const u_char *buf) 398{ 399 static const int offset = OFFSETOF(struct ng_ksocket_sockopt, value); 400 const struct ng_ksocket_sockopt *sopt; 401 const struct ng_mesg *msg; 402 403 sopt = (const struct ng_ksocket_sockopt *)(buf - offset); 404 msg = (const struct ng_mesg *)((const u_char *)sopt - sizeof(*msg)); 405 return msg->header.arglen - sizeof(*sopt); 406} 407 408/* Parse type for the option value part of a struct ng_ksocket_sockopt 409 XXX Eventually, we should handle the different socket options specially. 410 XXX This would avoid byte order problems, eg an integer value of 1 is 411 XXX going to be "[1]" for little endian or "[3=1]" for big endian. */ 412static const struct ng_parse_type ng_ksocket_sockoptval_type = { 413 &ng_parse_bytearray_type, 414 &ng_parse_sockoptval_getLength 415}; 416 417/* Parse type for struct ng_ksocket_sockopt */ 418static const struct ng_parse_struct_field ng_ksocket_sockopt_type_fields[] 419 = NG_KSOCKET_SOCKOPT_INFO(&ng_ksocket_sockoptval_type); 420static const struct ng_parse_type ng_ksocket_sockopt_type = { 421 &ng_parse_struct_type, 422 &ng_ksocket_sockopt_type_fields 423}; 424 425/* Parse type for struct ng_ksocket_accept */ 426static const struct ng_parse_struct_field ng_ksocket_accept_type_fields[] 427 = NGM_KSOCKET_ACCEPT_INFO; 428static const struct ng_parse_type ng_ksocket_accept_type = { 429 &ng_parse_struct_type, 430 &ng_ksocket_accept_type_fields 431}; 432 433/* List of commands and how to convert arguments to/from ASCII */ 434static const struct ng_cmdlist ng_ksocket_cmds[] = { 435 { 436 NGM_KSOCKET_COOKIE, 437 NGM_KSOCKET_BIND, 438 "bind", 439 &ng_ksocket_sockaddr_type, 440 NULL 441 }, 442 { 443 NGM_KSOCKET_COOKIE, 444 NGM_KSOCKET_LISTEN, 445 "listen", 446 &ng_parse_int32_type, 447 NULL 448 }, 449 { 450 NGM_KSOCKET_COOKIE, 451 NGM_KSOCKET_ACCEPT, 452 "accept", 453 NULL, 454 &ng_ksocket_accept_type 455 }, 456 { 457 NGM_KSOCKET_COOKIE, 458 NGM_KSOCKET_CONNECT, 459 "connect", 460 &ng_ksocket_sockaddr_type, 461 &ng_parse_int32_type 462 }, 463 { 464 NGM_KSOCKET_COOKIE, 465 NGM_KSOCKET_GETNAME, 466 "getname", 467 NULL, 468 &ng_ksocket_sockaddr_type 469 }, 470 { 471 NGM_KSOCKET_COOKIE, 472 NGM_KSOCKET_GETPEERNAME, 473 "getpeername", 474 NULL, 475 &ng_ksocket_sockaddr_type 476 }, 477 { 478 NGM_KSOCKET_COOKIE, 479 NGM_KSOCKET_SETOPT, 480 "setopt", 481 &ng_ksocket_sockopt_type, 482 NULL 483 }, 484 { 485 NGM_KSOCKET_COOKIE, 486 NGM_KSOCKET_GETOPT, 487 "getopt", 488 &ng_ksocket_sockopt_type, 489 &ng_ksocket_sockopt_type 490 }, 491 { 0 } 492}; 493 494/* Node type descriptor */ 495static struct ng_type ng_ksocket_typestruct = { 496 .version = NG_ABI_VERSION, 497 .name = NG_KSOCKET_NODE_TYPE, 498 .constructor = ng_ksocket_constructor, 499 .rcvmsg = ng_ksocket_rcvmsg, 500 .shutdown = ng_ksocket_shutdown, 501 .newhook = ng_ksocket_newhook, 502 .connect = ng_ksocket_connect, 503 .rcvdata = ng_ksocket_rcvdata, 504 .disconnect = ng_ksocket_disconnect, 505 .cmdlist = ng_ksocket_cmds, 506}; 507NETGRAPH_INIT(ksocket, &ng_ksocket_typestruct); 508 509#define ERROUT(x) do { error = (x); goto done; } while (0) 510 511/************************************************************************ 512 NETGRAPH NODE STUFF 513 ************************************************************************/ 514 515/* 516 * Node type constructor 517 * The NODE part is assumed to be all set up. 518 * There is already a reference to the node for us. 519 */ 520static int 521ng_ksocket_constructor(node_p node) 522{ 523 priv_p priv; 524 525 /* Allocate private structure */ 526 priv = malloc(sizeof(*priv), M_NETGRAPH_KSOCKET, M_WAITOK | M_ZERO); 527 528 LIST_INIT(&priv->embryos); 529 /* cross link them */ 530 priv->node = node; 531 NG_NODE_SET_PRIVATE(node, priv); 532 533 /* Done */ 534 return (0); 535} 536 537/* 538 * Give our OK for a hook to be added. The hook name is of the 539 * form "<family>/<type>/<proto>" where the three components may 540 * be decimal numbers or else aliases from the above lists. 541 * 542 * Connecting a hook amounts to opening the socket. Disconnecting 543 * the hook closes the socket and destroys the node as well. 544 */ 545static int 546ng_ksocket_newhook(node_p node, hook_p hook, const char *name0) 547{ 548 struct thread *td = curthread; /* XXX broken */ 549 const priv_p priv = NG_NODE_PRIVATE(node); 550 char *s1, *s2, name[NG_HOOKSIZ]; 551 int family, type, protocol, error; 552 553 /* Check if we're already connected */ 554 if (priv->hook != NULL) 555 return (EISCONN); 556 557 if (priv->flags & KSF_CLONED) { 558 if (priv->flags & KSF_EMBRYONIC) { 559 /* Remove ourselves from our parent's embryo list */ 560 LIST_REMOVE(priv, siblings); 561 priv->flags &= ~KSF_EMBRYONIC; 562 } 563 } else { 564 /* Extract family, type, and protocol from hook name */ 565 snprintf(name, sizeof(name), "%s", name0); 566 s1 = name; 567 if ((s2 = index(s1, '/')) == NULL) 568 return (EINVAL); 569 *s2++ = '\0'; 570 family = ng_ksocket_parse(ng_ksocket_families, s1, 0); 571 if (family == -1) 572 return (EINVAL); 573 s1 = s2; 574 if ((s2 = index(s1, '/')) == NULL) 575 return (EINVAL); 576 *s2++ = '\0'; 577 type = ng_ksocket_parse(ng_ksocket_types, s1, 0); 578 if (type == -1) 579 return (EINVAL); 580 s1 = s2; 581 protocol = ng_ksocket_parse(ng_ksocket_protos, s1, family); 582 if (protocol == -1) 583 return (EINVAL); 584 585 /* Create the socket */ 586 error = socreate(family, &priv->so, type, protocol, 587 td->td_ucred, td); 588 if (error != 0) 589 return (error); 590 591 /* XXX call soreserve() ? */ 592 593 } 594 595 /* OK */ 596 priv->hook = hook; 597 598 /* 599 * In case of misconfigured routing a packet may reenter 600 * ksocket node recursively. Decouple stack to avoid possible 601 * panics about sleeping with locks held. 602 */ 603 NG_HOOK_FORCE_QUEUE(hook); 604 605 return(0); 606} 607 608static int 609ng_ksocket_connect(hook_p hook) 610{ 611 node_p node = NG_HOOK_NODE(hook); 612 const priv_p priv = NG_NODE_PRIVATE(node); 613 struct socket *const so = priv->so; 614 615 /* Add our hook for incoming data and other events */ 616 SOCKBUF_LOCK(&priv->so->so_rcv); 617 soupcall_set(priv->so, SO_RCV, ng_ksocket_incoming, node); 618 SOCKBUF_UNLOCK(&priv->so->so_rcv); 619 SOCKBUF_LOCK(&priv->so->so_snd); 620 soupcall_set(priv->so, SO_SND, ng_ksocket_incoming, node); 621 SOCKBUF_UNLOCK(&priv->so->so_snd); 622 SOCK_LOCK(priv->so); 623 priv->so->so_state |= SS_NBIO; 624 SOCK_UNLOCK(priv->so); 625 /* 626 * --Original comment-- 627 * On a cloned socket we may have already received one or more 628 * upcalls which we couldn't handle without a hook. Handle 629 * those now. 630 * We cannot call the upcall function directly 631 * from here, because until this function has returned our 632 * hook isn't connected. 633 * 634 * ---meta comment for -current --- 635 * XXX This is dubius. 636 * Upcalls between the time that the hook was 637 * first created and now (on another processesor) will 638 * be earlier on the queue than the request to finalise the hook. 639 * By the time the hook is finalised, 640 * The queued upcalls will have happenned and the code 641 * will have discarded them because of a lack of a hook. 642 * (socket not open). 643 * 644 * This is a bad byproduct of the complicated way in which hooks 645 * are now created (3 daisy chained async events). 646 * 647 * Since we are a netgraph operation 648 * We know that we hold a lock on this node. This forces the 649 * request we make below to be queued rather than implemented 650 * immediatly which will cause the upcall function to be called a bit 651 * later. 652 * However, as we will run any waiting queued operations immediatly 653 * after doing this one, if we have not finalised the other end 654 * of the hook, those queued operations will fail. 655 */ 656 if (priv->flags & KSF_CLONED) { 657 ng_send_fn(node, NULL, &ng_ksocket_incoming2, so, M_NOWAIT); 658 } 659 660 return (0); 661} 662 663/* 664 * Receive a control message 665 */ 666static int 667ng_ksocket_rcvmsg(node_p node, item_p item, hook_p lasthook) 668{ 669 struct thread *td = curthread; /* XXX broken */ 670 const priv_p priv = NG_NODE_PRIVATE(node); 671 struct socket *const so = priv->so; 672 struct ng_mesg *resp = NULL; 673 int error = 0; 674 struct ng_mesg *msg; 675 ng_ID_t raddr; 676 677 NGI_GET_MSG(item, msg); 678 switch (msg->header.typecookie) { 679 case NGM_KSOCKET_COOKIE: 680 switch (msg->header.cmd) { 681 case NGM_KSOCKET_BIND: 682 { 683 struct sockaddr *const sa 684 = (struct sockaddr *)msg->data; 685 686 /* Sanity check */ 687 if (msg->header.arglen < SADATA_OFFSET 688 || msg->header.arglen < sa->sa_len) 689 ERROUT(EINVAL); 690 if (so == NULL) 691 ERROUT(ENXIO); 692 693 /* Bind */ 694 error = sobind(so, sa, td); 695 break; 696 } 697 case NGM_KSOCKET_LISTEN: 698 { 699 /* Sanity check */ 700 if (msg->header.arglen != sizeof(int32_t)) 701 ERROUT(EINVAL); 702 if (so == NULL) 703 ERROUT(ENXIO); 704 705 /* Listen */ 706 error = solisten(so, *((int32_t *)msg->data), td); 707 break; 708 } 709 710 case NGM_KSOCKET_ACCEPT: 711 { 712 /* Sanity check */ 713 if (msg->header.arglen != 0) 714 ERROUT(EINVAL); 715 if (so == NULL) 716 ERROUT(ENXIO); 717 718 /* Make sure the socket is capable of accepting */ 719 if (!(so->so_options & SO_ACCEPTCONN)) 720 ERROUT(EINVAL); 721 if (priv->flags & KSF_ACCEPTING) 722 ERROUT(EALREADY); 723 724 error = ng_ksocket_check_accept(priv); 725 if (error != 0 && error != EWOULDBLOCK) 726 ERROUT(error); 727 728 /* 729 * If a connection is already complete, take it. 730 * Otherwise let the upcall function deal with 731 * the connection when it comes in. 732 */ 733 priv->response_token = msg->header.token; 734 raddr = priv->response_addr = NGI_RETADDR(item); 735 if (error == 0) { 736 ng_ksocket_finish_accept(priv); 737 } else 738 priv->flags |= KSF_ACCEPTING; 739 break; 740 } 741 742 case NGM_KSOCKET_CONNECT: 743 { 744 struct sockaddr *const sa 745 = (struct sockaddr *)msg->data; 746 747 /* Sanity check */ 748 if (msg->header.arglen < SADATA_OFFSET 749 || msg->header.arglen < sa->sa_len) 750 ERROUT(EINVAL); 751 if (so == NULL) 752 ERROUT(ENXIO); 753 754 /* Do connect */ 755 if ((so->so_state & SS_ISCONNECTING) != 0) 756 ERROUT(EALREADY); 757 if ((error = soconnect(so, sa, td)) != 0) { 758 so->so_state &= ~SS_ISCONNECTING; 759 ERROUT(error); 760 } 761 if ((so->so_state & SS_ISCONNECTING) != 0) { 762 /* We will notify the sender when we connect */ 763 priv->response_token = msg->header.token; 764 raddr = priv->response_addr = NGI_RETADDR(item); 765 priv->flags |= KSF_CONNECTING; 766 ERROUT(EINPROGRESS); 767 } 768 break; 769 } 770 771 case NGM_KSOCKET_GETNAME: 772 case NGM_KSOCKET_GETPEERNAME: 773 { 774 int (*func)(struct socket *so, struct sockaddr **nam); 775 struct sockaddr *sa = NULL; 776 int len; 777 778 /* Sanity check */ 779 if (msg->header.arglen != 0) 780 ERROUT(EINVAL); 781 if (so == NULL) 782 ERROUT(ENXIO); 783 784 /* Get function */ 785 if (msg->header.cmd == NGM_KSOCKET_GETPEERNAME) { 786 if ((so->so_state 787 & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) 788 ERROUT(ENOTCONN); 789 func = so->so_proto->pr_usrreqs->pru_peeraddr; 790 } else 791 func = so->so_proto->pr_usrreqs->pru_sockaddr; 792 793 /* Get local or peer address */ 794 if ((error = (*func)(so, &sa)) != 0) 795 goto bail; 796 len = (sa == NULL) ? 0 : sa->sa_len; 797 798 /* Send it back in a response */ 799 NG_MKRESPONSE(resp, msg, len, M_NOWAIT); 800 if (resp == NULL) { 801 error = ENOMEM; 802 goto bail; 803 } 804 bcopy(sa, resp->data, len); 805 806 bail: 807 /* Cleanup */ 808 if (sa != NULL) 809 free(sa, M_SONAME); 810 break; 811 } 812 813 case NGM_KSOCKET_GETOPT: 814 { 815 struct ng_ksocket_sockopt *ksopt = 816 (struct ng_ksocket_sockopt *)msg->data; 817 struct sockopt sopt; 818 819 /* Sanity check */ 820 if (msg->header.arglen != sizeof(*ksopt)) 821 ERROUT(EINVAL); 822 if (so == NULL) 823 ERROUT(ENXIO); 824 825 /* Get response with room for option value */ 826 NG_MKRESPONSE(resp, msg, sizeof(*ksopt) 827 + NG_KSOCKET_MAX_OPTLEN, M_NOWAIT); 828 if (resp == NULL) 829 ERROUT(ENOMEM); 830 831 /* Get socket option, and put value in the response */ 832 sopt.sopt_dir = SOPT_GET; 833 sopt.sopt_level = ksopt->level; 834 sopt.sopt_name = ksopt->name; 835 sopt.sopt_td = NULL; 836 sopt.sopt_valsize = NG_KSOCKET_MAX_OPTLEN; 837 ksopt = (struct ng_ksocket_sockopt *)resp->data; 838 sopt.sopt_val = ksopt->value; 839 if ((error = sogetopt(so, &sopt)) != 0) { 840 NG_FREE_MSG(resp); 841 break; 842 } 843 844 /* Set actual value length */ 845 resp->header.arglen = sizeof(*ksopt) 846 + sopt.sopt_valsize; 847 break; 848 } 849 850 case NGM_KSOCKET_SETOPT: 851 { 852 struct ng_ksocket_sockopt *const ksopt = 853 (struct ng_ksocket_sockopt *)msg->data; 854 const int valsize = msg->header.arglen - sizeof(*ksopt); 855 struct sockopt sopt; 856 857 /* Sanity check */ 858 if (valsize < 0) 859 ERROUT(EINVAL); 860 if (so == NULL) 861 ERROUT(ENXIO); 862 863 /* Set socket option */ 864 sopt.sopt_dir = SOPT_SET; 865 sopt.sopt_level = ksopt->level; 866 sopt.sopt_name = ksopt->name; 867 sopt.sopt_val = ksopt->value; 868 sopt.sopt_valsize = valsize; 869 sopt.sopt_td = NULL; 870 error = sosetopt(so, &sopt); 871 break; 872 } 873 874 default: 875 error = EINVAL; 876 break; 877 } 878 break; 879 default: 880 error = EINVAL; 881 break; 882 } 883done: 884 NG_RESPOND_MSG(error, node, item, resp); 885 NG_FREE_MSG(msg); 886 return (error); 887} 888 889/* 890 * Receive incoming data on our hook. Send it out the socket. 891 */ 892static int 893ng_ksocket_rcvdata(hook_p hook, item_p item) 894{ 895 struct thread *td = curthread; /* XXX broken */ 896 const node_p node = NG_HOOK_NODE(hook); 897 const priv_p priv = NG_NODE_PRIVATE(node); 898 struct socket *const so = priv->so; 899 struct sockaddr *sa = NULL; 900 int error; 901 struct mbuf *m; 902#ifdef ALIGNED_POINTER 903 struct mbuf *n; 904#endif /* ALIGNED_POINTER */ 905 struct sa_tag *stag; 906 907 /* Extract data */ 908 NGI_GET_M(item, m); 909 NG_FREE_ITEM(item); 910#ifdef ALIGNED_POINTER 911 if (!ALIGNED_POINTER(mtod(m, caddr_t), uint32_t)) { 912 n = m_defrag(m, M_NOWAIT); 913 if (n == NULL) { 914 m_freem(m); 915 return (ENOBUFS); 916 } 917 m = n; 918 } 919#endif /* ALIGNED_POINTER */ 920 /* 921 * Look if socket address is stored in packet tags. 922 * If sockaddr is ours, or provided by a third party (zero id), 923 * then we accept it. 924 */ 925 if (((stag = (struct sa_tag *)m_tag_locate(m, NGM_KSOCKET_COOKIE, 926 NG_KSOCKET_TAG_SOCKADDR, NULL)) != NULL) && 927 (stag->id == NG_NODE_ID(node) || stag->id == 0)) 928 sa = &stag->sa; 929 930 /* Reset specific mbuf flags to prevent addressing problems. */ 931 m->m_flags &= ~(M_BCAST|M_MCAST); 932 933 /* Send packet */ 934 error = sosend(so, sa, 0, m, 0, 0, td); 935 936 return (error); 937} 938 939/* 940 * Destroy node 941 */ 942static int 943ng_ksocket_shutdown(node_p node) 944{ 945 const priv_p priv = NG_NODE_PRIVATE(node); 946 priv_p embryo; 947 948 /* Close our socket (if any) */ 949 if (priv->so != NULL) { 950 SOCKBUF_LOCK(&priv->so->so_rcv); 951 soupcall_clear(priv->so, SO_RCV); 952 SOCKBUF_UNLOCK(&priv->so->so_rcv); 953 SOCKBUF_LOCK(&priv->so->so_snd); 954 soupcall_clear(priv->so, SO_SND); 955 SOCKBUF_UNLOCK(&priv->so->so_snd); 956 soclose(priv->so); 957 priv->so = NULL; 958 } 959 960 /* If we are an embryo, take ourselves out of the parent's list */ 961 if (priv->flags & KSF_EMBRYONIC) { 962 LIST_REMOVE(priv, siblings); 963 priv->flags &= ~KSF_EMBRYONIC; 964 } 965 966 /* Remove any embryonic children we have */ 967 while (!LIST_EMPTY(&priv->embryos)) { 968 embryo = LIST_FIRST(&priv->embryos); 969 ng_rmnode_self(embryo->node); 970 } 971 972 /* Take down netgraph node */ 973 bzero(priv, sizeof(*priv)); 974 free(priv, M_NETGRAPH_KSOCKET); 975 NG_NODE_SET_PRIVATE(node, NULL); 976 NG_NODE_UNREF(node); /* let the node escape */ 977 return (0); 978} 979 980/* 981 * Hook disconnection 982 */ 983static int 984ng_ksocket_disconnect(hook_p hook) 985{ 986 KASSERT(NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0, 987 ("%s: numhooks=%d?", __func__, 988 NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)))); 989 if (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))) 990 ng_rmnode_self(NG_HOOK_NODE(hook)); 991 return (0); 992} 993 994/************************************************************************ 995 HELPER STUFF 996 ************************************************************************/ 997/* 998 * You should not "just call" a netgraph node function from an external 999 * asynchronous event. This is because in doing so you are ignoring the 1000 * locking on the netgraph nodes. Instead call your function via ng_send_fn(). 1001 * This will call the function you chose, but will first do all the 1002 * locking rigmarole. Your function MAY only be called at some distant future 1003 * time (several millisecs away) so don't give it any arguments 1004 * that may be revoked soon (e.g. on your stack). 1005 * 1006 * To decouple stack, we use queue version of ng_send_fn(). 1007 */ 1008 1009static int 1010ng_ksocket_incoming(struct socket *so, void *arg, int waitflag) 1011{ 1012 const node_p node = arg; 1013 const priv_p priv = NG_NODE_PRIVATE(node); 1014 int wait = ((waitflag & M_WAITOK) ? NG_WAITOK : 0) | NG_QUEUE; 1015 1016 /* 1017 * Even if node is not locked, as soon as we are called, we assume 1018 * it exist and it's private area is valid. With some care we can 1019 * access it. Mark node that incoming event for it was sent to 1020 * avoid unneded queue trashing. 1021 */ 1022 if (atomic_cmpset_int(&priv->fn_sent, 0, 1) && 1023 ng_send_fn1(node, NULL, &ng_ksocket_incoming2, so, 0, wait)) { 1024 atomic_store_rel_int(&priv->fn_sent, 0); 1025 } 1026 return (SU_OK); 1027} 1028 1029 1030/* 1031 * When incoming data is appended to the socket, we get notified here. 1032 * This is also called whenever a significant event occurs for the socket. 1033 * Our original caller may have queued this even some time ago and 1034 * we cannot trust that he even still exists. The node however is being 1035 * held with a reference by the queueing code and guarantied to be valid. 1036 */ 1037static void 1038ng_ksocket_incoming2(node_p node, hook_p hook, void *arg1, int arg2) 1039{ 1040 struct socket *so = arg1; 1041 const priv_p priv = NG_NODE_PRIVATE(node); 1042 struct mbuf *m; 1043 struct ng_mesg *response; 1044 struct uio auio; 1045 int s, flags, error; 1046 1047 s = splnet(); 1048 1049 /* so = priv->so; *//* XXX could have derived this like so */ 1050 KASSERT(so == priv->so, ("%s: wrong socket", __func__)); 1051 1052 /* Allow next incoming event to be queued. */ 1053 atomic_store_rel_int(&priv->fn_sent, 0); 1054 1055 /* Check whether a pending connect operation has completed */ 1056 if (priv->flags & KSF_CONNECTING) { 1057 if ((error = so->so_error) != 0) { 1058 so->so_error = 0; 1059 so->so_state &= ~SS_ISCONNECTING; 1060 } 1061 if (!(so->so_state & SS_ISCONNECTING)) { 1062 NG_MKMESSAGE(response, NGM_KSOCKET_COOKIE, 1063 NGM_KSOCKET_CONNECT, sizeof(int32_t), M_NOWAIT); 1064 if (response != NULL) { 1065 response->header.flags |= NGF_RESP; 1066 response->header.token = priv->response_token; 1067 *(int32_t *)response->data = error; 1068 /* 1069 * send an async "response" message 1070 * to the node that set us up 1071 * (if it still exists) 1072 */ 1073 NG_SEND_MSG_ID(error, node, 1074 response, priv->response_addr, 0); 1075 } 1076 priv->flags &= ~KSF_CONNECTING; 1077 } 1078 } 1079 1080 /* Check whether a pending accept operation has completed */ 1081 if (priv->flags & KSF_ACCEPTING) { 1082 error = ng_ksocket_check_accept(priv); 1083 if (error != EWOULDBLOCK) 1084 priv->flags &= ~KSF_ACCEPTING; 1085 if (error == 0) 1086 ng_ksocket_finish_accept(priv); 1087 } 1088 1089 /* 1090 * If we don't have a hook, we must handle data events later. When 1091 * the hook gets created and is connected, this upcall function 1092 * will be called again. 1093 */ 1094 if (priv->hook == NULL) { 1095 splx(s); 1096 return; 1097 } 1098 1099 /* Read and forward available mbuf's */ 1100 auio.uio_td = NULL; 1101 auio.uio_resid = 1000000000; 1102 flags = MSG_DONTWAIT; 1103 while (1) { 1104 struct sockaddr *sa = NULL; 1105 struct mbuf *n; 1106 1107 /* Try to get next packet from socket */ 1108 if ((error = soreceive(so, (so->so_state & SS_ISCONNECTED) ? 1109 NULL : &sa, &auio, &m, (struct mbuf **)0, &flags)) != 0) 1110 break; 1111 1112 /* See if we got anything */ 1113 if (m == NULL) { 1114 if (sa != NULL) 1115 free(sa, M_SONAME); 1116 break; 1117 } 1118 1119 /* 1120 * Don't trust the various socket layers to get the 1121 * packet header and length correct (e.g. kern/15175). 1122 * 1123 * Also, do not trust that soreceive() will clear m_nextpkt 1124 * for us (e.g. kern/84952, kern/82413). 1125 */ 1126 m->m_pkthdr.csum_flags = 0; 1127 for (n = m, m->m_pkthdr.len = 0; n != NULL; n = n->m_next) { 1128 m->m_pkthdr.len += n->m_len; 1129 n->m_nextpkt = NULL; 1130 } 1131 1132 /* Put peer's socket address (if any) into a tag */ 1133 if (sa != NULL) { 1134 struct sa_tag *stag; 1135 1136 stag = (struct sa_tag *)m_tag_alloc(NGM_KSOCKET_COOKIE, 1137 NG_KSOCKET_TAG_SOCKADDR, sizeof(ng_ID_t) + 1138 sa->sa_len, M_NOWAIT); 1139 if (stag == NULL) { 1140 free(sa, M_SONAME); 1141 goto sendit; 1142 } 1143 bcopy(sa, &stag->sa, sa->sa_len); 1144 free(sa, M_SONAME); 1145 stag->id = NG_NODE_ID(node); 1146 m_tag_prepend(m, &stag->tag); 1147 } 1148 1149sendit: /* Forward data with optional peer sockaddr as packet tag */ 1150 NG_SEND_DATA_ONLY(error, priv->hook, m); 1151 } 1152 1153 /* 1154 * If the peer has closed the connection, forward a 0-length mbuf 1155 * to indicate end-of-file. 1156 */ 1157 if (so->so_rcv.sb_state & SBS_CANTRCVMORE && !(priv->flags & KSF_EOFSEEN)) { 1158 MGETHDR(m, M_NOWAIT, MT_DATA); 1159 if (m != NULL) { 1160 m->m_len = m->m_pkthdr.len = 0; 1161 NG_SEND_DATA_ONLY(error, priv->hook, m); 1162 } 1163 priv->flags |= KSF_EOFSEEN; 1164 } 1165 splx(s); 1166} 1167 1168/* 1169 * Check for a completed incoming connection and return 0 if one is found. 1170 * Otherwise return the appropriate error code. 1171 */ 1172static int 1173ng_ksocket_check_accept(priv_p priv) 1174{ 1175 struct socket *const head = priv->so; 1176 int error; 1177 1178 if ((error = head->so_error) != 0) { 1179 head->so_error = 0; 1180 return error; 1181 } 1182 /* Unlocked read. */ 1183 if (TAILQ_EMPTY(&head->so_comp)) { 1184 if (head->so_rcv.sb_state & SBS_CANTRCVMORE) 1185 return ECONNABORTED; 1186 return EWOULDBLOCK; 1187 } 1188 return 0; 1189} 1190 1191/* 1192 * Handle the first completed incoming connection, assumed to be already 1193 * on the socket's so_comp queue. 1194 */ 1195static void 1196ng_ksocket_finish_accept(priv_p priv) 1197{ 1198 struct socket *const head = priv->so; 1199 struct socket *so; 1200 struct sockaddr *sa = NULL; 1201 struct ng_mesg *resp; 1202 struct ng_ksocket_accept *resp_data; 1203 node_p node; 1204 priv_p priv2; 1205 int len; 1206 int error; 1207 1208 ACCEPT_LOCK(); 1209 so = TAILQ_FIRST(&head->so_comp); 1210 if (so == NULL) { /* Should never happen */ 1211 ACCEPT_UNLOCK(); 1212 return; 1213 } 1214 TAILQ_REMOVE(&head->so_comp, so, so_list); 1215 head->so_qlen--; 1216 so->so_qstate &= ~SQ_COMP; 1217 so->so_head = NULL; 1218 SOCK_LOCK(so); 1219 soref(so); 1220 so->so_state |= SS_NBIO; 1221 SOCK_UNLOCK(so); 1222 ACCEPT_UNLOCK(); 1223 1224 /* XXX KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0); */ 1225 1226 soaccept(so, &sa); 1227 1228 len = OFFSETOF(struct ng_ksocket_accept, addr); 1229 if (sa != NULL) 1230 len += sa->sa_len; 1231 1232 NG_MKMESSAGE(resp, NGM_KSOCKET_COOKIE, NGM_KSOCKET_ACCEPT, len, 1233 M_NOWAIT); 1234 if (resp == NULL) { 1235 soclose(so); 1236 goto out; 1237 } 1238 resp->header.flags |= NGF_RESP; 1239 resp->header.token = priv->response_token; 1240 1241 /* Clone a ksocket node to wrap the new socket */ 1242 error = ng_make_node_common(&ng_ksocket_typestruct, &node); 1243 if (error) { 1244 free(resp, M_NETGRAPH); 1245 soclose(so); 1246 goto out; 1247 } 1248 1249 if (ng_ksocket_constructor(node) != 0) { 1250 NG_NODE_UNREF(node); 1251 free(resp, M_NETGRAPH); 1252 soclose(so); 1253 goto out; 1254 } 1255 1256 priv2 = NG_NODE_PRIVATE(node); 1257 priv2->so = so; 1258 priv2->flags |= KSF_CLONED | KSF_EMBRYONIC; 1259 1260 /* 1261 * Insert the cloned node into a list of embryonic children 1262 * on the parent node. When a hook is created on the cloned 1263 * node it will be removed from this list. When the parent 1264 * is destroyed it will destroy any embryonic children it has. 1265 */ 1266 LIST_INSERT_HEAD(&priv->embryos, priv2, siblings); 1267 1268 SOCKBUF_LOCK(&so->so_rcv); 1269 soupcall_set(so, SO_RCV, ng_ksocket_incoming, node); 1270 SOCKBUF_UNLOCK(&so->so_rcv); 1271 SOCKBUF_LOCK(&so->so_snd); 1272 soupcall_set(so, SO_SND, ng_ksocket_incoming, node); 1273 SOCKBUF_UNLOCK(&so->so_snd); 1274 1275 /* Fill in the response data and send it or return it to the caller */ 1276 resp_data = (struct ng_ksocket_accept *)resp->data; 1277 resp_data->nodeid = NG_NODE_ID(node); 1278 if (sa != NULL) 1279 bcopy(sa, &resp_data->addr, sa->sa_len); 1280 NG_SEND_MSG_ID(error, node, resp, priv->response_addr, 0); 1281 1282out: 1283 if (sa != NULL) 1284 free(sa, M_SONAME); 1285} 1286 1287/* 1288 * Parse out either an integer value or an alias. 1289 */ 1290static int 1291ng_ksocket_parse(const struct ng_ksocket_alias *aliases, 1292 const char *s, int family) 1293{ 1294 int k, val; 1295 char *eptr; 1296 1297 /* Try aliases */ 1298 for (k = 0; aliases[k].name != NULL; k++) { 1299 if (strcmp(s, aliases[k].name) == 0 1300 && aliases[k].family == family) 1301 return aliases[k].value; 1302 } 1303 1304 /* Try parsing as a number */ 1305 val = (int)strtoul(s, &eptr, 10); 1306 if (val < 0 || *eptr != '\0') 1307 return (-1); 1308 return (val); 1309} 1310 1311