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sys/netgraph/ng_ksocket.c
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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: releng/11.2/sys/netgraph/ng_ksocket.c 298813 2016-04-29 21:25:05Z pfg $ 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 <netinet/ip.h> 70 71 #ifdef NG_SEPARATE_MALLOC 72 static MALLOC_DEFINE(M_NETGRAPH_KSOCKET, "netgraph_ksock", 73 "netgraph ksock node"); 74 #else 75 #define M_NETGRAPH_KSOCKET M_NETGRAPH 76 #endif 77 78 #define OFFSETOF(s, e) ((char *)&((s *)0)->e - (char *)((s *)0)) 79 #define SADATA_OFFSET (OFFSETOF(struct sockaddr, sa_data)) 80 81 /* Node private data */ 82 struct ng_ksocket_private { 83 node_p node; 84 hook_p hook; 85 struct socket *so; 86 int fn_sent; /* FN call on incoming event was sent */ 87 LIST_HEAD(, ng_ksocket_private) embryos; 88 LIST_ENTRY(ng_ksocket_private) siblings; 89 u_int32_t flags; 90 u_int32_t response_token; 91 ng_ID_t response_addr; 92 }; 93 typedef struct ng_ksocket_private *priv_p; 94 95 /* Flags for priv_p */ 96 #define KSF_CONNECTING 0x00000001 /* Waiting for connection complete */ 97 #define KSF_ACCEPTING 0x00000002 /* Waiting for accept complete */ 98 #define KSF_EOFSEEN 0x00000004 /* Have sent 0-length EOF mbuf */ 99 #define KSF_CLONED 0x00000008 /* Cloned from an accepting socket */ 100 #define KSF_EMBRYONIC 0x00000010 /* Cloned node with no hooks yet */ 101 102 /* Netgraph node methods */ 103 static ng_constructor_t ng_ksocket_constructor; 104 static ng_rcvmsg_t ng_ksocket_rcvmsg; 105 static ng_shutdown_t ng_ksocket_shutdown; 106 static ng_newhook_t ng_ksocket_newhook; 107 static ng_rcvdata_t ng_ksocket_rcvdata; 108 static ng_connect_t ng_ksocket_connect; 109 static ng_disconnect_t ng_ksocket_disconnect; 110 111 /* Alias structure */ 112 struct ng_ksocket_alias { 113 const char *name; 114 const int value; 115 const int family; 116 }; 117 118 /* Protocol family aliases */ 119 static const struct ng_ksocket_alias ng_ksocket_families[] = { 120 { "local", PF_LOCAL }, 121 { "inet", PF_INET }, 122 { "inet6", PF_INET6 }, 123 { "atm", PF_ATM }, 124 { NULL, -1 }, 125 }; 126 127 /* Socket type aliases */ 128 static const struct ng_ksocket_alias ng_ksocket_types[] = { 129 { "stream", SOCK_STREAM }, 130 { "dgram", SOCK_DGRAM }, 131 { "raw", SOCK_RAW }, 132 { "rdm", SOCK_RDM }, 133 { "seqpacket", SOCK_SEQPACKET }, 134 { NULL, -1 }, 135 }; 136 137 /* Protocol aliases */ 138 static const struct ng_ksocket_alias ng_ksocket_protos[] = { 139 { "ip", IPPROTO_IP, PF_INET }, 140 { "raw", IPPROTO_RAW, PF_INET }, 141 { "icmp", IPPROTO_ICMP, PF_INET }, 142 { "igmp", IPPROTO_IGMP, PF_INET }, 143 { "tcp", IPPROTO_TCP, PF_INET }, 144 { "udp", IPPROTO_UDP, PF_INET }, 145 { "gre", IPPROTO_GRE, PF_INET }, 146 { "esp", IPPROTO_ESP, PF_INET }, 147 { "ah", IPPROTO_AH, PF_INET }, 148 { "swipe", IPPROTO_SWIPE, PF_INET }, 149 { "encap", IPPROTO_ENCAP, PF_INET }, 150 { "divert", IPPROTO_DIVERT, PF_INET }, 151 { "pim", IPPROTO_PIM, PF_INET }, 152 { NULL, -1 }, 153 }; 154 155 /* Helper functions */ 156 static int ng_ksocket_check_accept(priv_p); 157 static void ng_ksocket_finish_accept(priv_p); 158 static int ng_ksocket_incoming(struct socket *so, void *arg, int waitflag); 159 static int ng_ksocket_parse(const struct ng_ksocket_alias *aliases, 160 const char *s, int family); 161 static void ng_ksocket_incoming2(node_p node, hook_p hook, 162 void *arg1, int arg2); 163 164 /************************************************************************ 165 STRUCT SOCKADDR PARSE TYPE 166 ************************************************************************/ 167 168 /* Get the length of the data portion of a generic struct sockaddr */ 169 static int 170 ng_parse_generic_sockdata_getLength(const struct ng_parse_type *type, 171 const u_char *start, const u_char *buf) 172 { 173 const struct sockaddr *sa; 174 175 sa = (const struct sockaddr *)(buf - SADATA_OFFSET); 176 return (sa->sa_len < SADATA_OFFSET) ? 0 : sa->sa_len - SADATA_OFFSET; 177 } 178 179 /* Type for the variable length data portion of a generic struct sockaddr */ 180 static const struct ng_parse_type ng_ksocket_generic_sockdata_type = { 181 &ng_parse_bytearray_type, 182 &ng_parse_generic_sockdata_getLength 183 }; 184 185 /* Type for a generic struct sockaddr */ 186 static const struct ng_parse_struct_field 187 ng_parse_generic_sockaddr_type_fields[] = { 188 { "len", &ng_parse_uint8_type }, 189 { "family", &ng_parse_uint8_type }, 190 { "data", &ng_ksocket_generic_sockdata_type }, 191 { NULL } 192 }; 193 static const struct ng_parse_type ng_ksocket_generic_sockaddr_type = { 194 &ng_parse_struct_type, 195 &ng_parse_generic_sockaddr_type_fields 196 }; 197 198 /* Convert a struct sockaddr from ASCII to binary. If its a protocol 199 family that we specially handle, do that, otherwise defer to the 200 generic parse type ng_ksocket_generic_sockaddr_type. */ 201 static int 202 ng_ksocket_sockaddr_parse(const struct ng_parse_type *type, 203 const char *s, int *off, const u_char *const start, 204 u_char *const buf, int *buflen) 205 { 206 struct sockaddr *const sa = (struct sockaddr *)buf; 207 enum ng_parse_token tok; 208 char fambuf[32]; 209 int family, len; 210 char *t; 211 212 /* If next token is a left curly brace, use generic parse type */ 213 if ((tok = ng_parse_get_token(s, off, &len)) == T_LBRACE) { 214 return (*ng_ksocket_generic_sockaddr_type.supertype->parse) 215 (&ng_ksocket_generic_sockaddr_type, 216 s, off, start, buf, buflen); 217 } 218 219 /* Get socket address family followed by a slash */ 220 while (isspace(s[*off])) 221 (*off)++; 222 if ((t = strchr(s + *off, '/')) == NULL) 223 return (EINVAL); 224 if ((len = t - (s + *off)) > sizeof(fambuf) - 1) 225 return (EINVAL); 226 strncpy(fambuf, s + *off, len); 227 fambuf[len] = '\0'; 228 *off += len + 1; 229 if ((family = ng_ksocket_parse(ng_ksocket_families, fambuf, 0)) == -1) 230 return (EINVAL); 231 232 /* Set family */ 233 if (*buflen < SADATA_OFFSET) 234 return (ERANGE); 235 sa->sa_family = family; 236 237 /* Set family-specific data and length */ 238 switch (sa->sa_family) { 239 case PF_LOCAL: /* Get pathname */ 240 { 241 const int pathoff = OFFSETOF(struct sockaddr_un, sun_path); 242 struct sockaddr_un *const sun = (struct sockaddr_un *)sa; 243 int toklen, pathlen; 244 char *path; 245 246 if ((path = ng_get_string_token(s, off, &toklen, NULL)) == NULL) 247 return (EINVAL); 248 pathlen = strlen(path); 249 if (pathlen > SOCK_MAXADDRLEN) { 250 free(path, M_NETGRAPH_KSOCKET); 251 return (E2BIG); 252 } 253 if (*buflen < pathoff + pathlen) { 254 free(path, M_NETGRAPH_KSOCKET); 255 return (ERANGE); 256 } 257 *off += toklen; 258 bcopy(path, sun->sun_path, pathlen); 259 sun->sun_len = pathoff + pathlen; 260 free(path, M_NETGRAPH_KSOCKET); 261 break; 262 } 263 264 case PF_INET: /* Get an IP address with optional port */ 265 { 266 struct sockaddr_in *const sin = (struct sockaddr_in *)sa; 267 int i; 268 269 /* Parse this: <ipaddress>[:port] */ 270 for (i = 0; i < 4; i++) { 271 u_long val; 272 char *eptr; 273 274 val = strtoul(s + *off, &eptr, 10); 275 if (val > 0xff || eptr == s + *off) 276 return (EINVAL); 277 *off += (eptr - (s + *off)); 278 ((u_char *)&sin->sin_addr)[i] = (u_char)val; 279 if (i < 3) { 280 if (s[*off] != '.') 281 return (EINVAL); 282 (*off)++; 283 } else if (s[*off] == ':') { 284 (*off)++; 285 val = strtoul(s + *off, &eptr, 10); 286 if (val > 0xffff || eptr == s + *off) 287 return (EINVAL); 288 *off += (eptr - (s + *off)); 289 sin->sin_port = htons(val); 290 } else 291 sin->sin_port = 0; 292 } 293 bzero(&sin->sin_zero, sizeof(sin->sin_zero)); 294 sin->sin_len = sizeof(*sin); 295 break; 296 } 297 298 #if 0 299 case PF_INET6: /* XXX implement this someday */ 300 #endif 301 302 default: 303 return (EINVAL); 304 } 305 306 /* Done */ 307 *buflen = sa->sa_len; 308 return (0); 309 } 310 311 /* Convert a struct sockaddr from binary to ASCII */ 312 static int 313 ng_ksocket_sockaddr_unparse(const struct ng_parse_type *type, 314 const u_char *data, int *off, char *cbuf, int cbuflen) 315 { 316 const struct sockaddr *sa = (const struct sockaddr *)(data + *off); 317 int slen = 0; 318 319 /* Output socket address, either in special or generic format */ 320 switch (sa->sa_family) { 321 case PF_LOCAL: 322 { 323 const int pathoff = OFFSETOF(struct sockaddr_un, sun_path); 324 const struct sockaddr_un *sun = (const struct sockaddr_un *)sa; 325 const int pathlen = sun->sun_len - pathoff; 326 char pathbuf[SOCK_MAXADDRLEN + 1]; 327 char *pathtoken; 328 329 bcopy(sun->sun_path, pathbuf, pathlen); 330 if ((pathtoken = ng_encode_string(pathbuf, pathlen)) == NULL) 331 return (ENOMEM); 332 slen += snprintf(cbuf, cbuflen, "local/%s", pathtoken); 333 free(pathtoken, M_NETGRAPH_KSOCKET); 334 if (slen >= cbuflen) 335 return (ERANGE); 336 *off += sun->sun_len; 337 return (0); 338 } 339 340 case PF_INET: 341 { 342 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; 343 344 slen += snprintf(cbuf, cbuflen, "inet/%d.%d.%d.%d", 345 ((const u_char *)&sin->sin_addr)[0], 346 ((const u_char *)&sin->sin_addr)[1], 347 ((const u_char *)&sin->sin_addr)[2], 348 ((const u_char *)&sin->sin_addr)[3]); 349 if (sin->sin_port != 0) { 350 slen += snprintf(cbuf + strlen(cbuf), 351 cbuflen - strlen(cbuf), ":%d", 352 (u_int)ntohs(sin->sin_port)); 353 } 354 if (slen >= cbuflen) 355 return (ERANGE); 356 *off += sizeof(*sin); 357 return(0); 358 } 359 360 #if 0 361 case PF_INET6: /* XXX implement this someday */ 362 #endif 363 364 default: 365 return (*ng_ksocket_generic_sockaddr_type.supertype->unparse) 366 (&ng_ksocket_generic_sockaddr_type, 367 data, off, cbuf, cbuflen); 368 } 369 } 370 371 /* Parse type for struct sockaddr */ 372 static const struct ng_parse_type ng_ksocket_sockaddr_type = { 373 NULL, 374 NULL, 375 NULL, 376 &ng_ksocket_sockaddr_parse, 377 &ng_ksocket_sockaddr_unparse, 378 NULL /* no such thing as a default struct sockaddr */ 379 }; 380 381 /************************************************************************ 382 STRUCT NG_KSOCKET_SOCKOPT PARSE TYPE 383 ************************************************************************/ 384 385 /* Get length of the struct ng_ksocket_sockopt value field, which is the 386 just the excess of the message argument portion over the length of 387 the struct ng_ksocket_sockopt. */ 388 static int 389 ng_parse_sockoptval_getLength(const struct ng_parse_type *type, 390 const u_char *start, const u_char *buf) 391 { 392 static const int offset = OFFSETOF(struct ng_ksocket_sockopt, value); 393 const struct ng_ksocket_sockopt *sopt; 394 const struct ng_mesg *msg; 395 396 sopt = (const struct ng_ksocket_sockopt *)(buf - offset); 397 msg = (const struct ng_mesg *)((const u_char *)sopt - sizeof(*msg)); 398 return msg->header.arglen - sizeof(*sopt); 399 } 400 401 /* Parse type for the option value part of a struct ng_ksocket_sockopt 402 XXX Eventually, we should handle the different socket options specially. 403 XXX This would avoid byte order problems, eg an integer value of 1 is 404 XXX going to be "[1]" for little endian or "[3=1]" for big endian. */ 405 static const struct ng_parse_type ng_ksocket_sockoptval_type = { 406 &ng_parse_bytearray_type, 407 &ng_parse_sockoptval_getLength 408 }; 409 410 /* Parse type for struct ng_ksocket_sockopt */ 411 static const struct ng_parse_struct_field ng_ksocket_sockopt_type_fields[] 412 = NG_KSOCKET_SOCKOPT_INFO(&ng_ksocket_sockoptval_type); 413 static const struct ng_parse_type ng_ksocket_sockopt_type = { 414 &ng_parse_struct_type, 415 &ng_ksocket_sockopt_type_fields 416 }; 417 418 /* Parse type for struct ng_ksocket_accept */ 419 static const struct ng_parse_struct_field ng_ksocket_accept_type_fields[] 420 = NGM_KSOCKET_ACCEPT_INFO; 421 static const struct ng_parse_type ng_ksocket_accept_type = { 422 &ng_parse_struct_type, 423 &ng_ksocket_accept_type_fields 424 }; 425 426 /* List of commands and how to convert arguments to/from ASCII */ 427 static const struct ng_cmdlist ng_ksocket_cmds[] = { 428 { 429 NGM_KSOCKET_COOKIE, 430 NGM_KSOCKET_BIND, 431 "bind", 432 &ng_ksocket_sockaddr_type, 433 NULL 434 }, 435 { 436 NGM_KSOCKET_COOKIE, 437 NGM_KSOCKET_LISTEN, 438 "listen", 439 &ng_parse_int32_type, 440 NULL 441 }, 442 { 443 NGM_KSOCKET_COOKIE, 444 NGM_KSOCKET_ACCEPT, 445 "accept", 446 NULL, 447 &ng_ksocket_accept_type 448 }, 449 { 450 NGM_KSOCKET_COOKIE, 451 NGM_KSOCKET_CONNECT, 452 "connect", 453 &ng_ksocket_sockaddr_type, 454 &ng_parse_int32_type 455 }, 456 { 457 NGM_KSOCKET_COOKIE, 458 NGM_KSOCKET_GETNAME, 459 "getname", 460 NULL, 461 &ng_ksocket_sockaddr_type 462 }, 463 { 464 NGM_KSOCKET_COOKIE, 465 NGM_KSOCKET_GETPEERNAME, 466 "getpeername", 467 NULL, 468 &ng_ksocket_sockaddr_type 469 }, 470 { 471 NGM_KSOCKET_COOKIE, 472 NGM_KSOCKET_SETOPT, 473 "setopt", 474 &ng_ksocket_sockopt_type, 475 NULL 476 }, 477 { 478 NGM_KSOCKET_COOKIE, 479 NGM_KSOCKET_GETOPT, 480 "getopt", 481 &ng_ksocket_sockopt_type, 482 &ng_ksocket_sockopt_type 483 }, 484 { 0 } 485 }; 486 487 /* Node type descriptor */ 488 static struct ng_type ng_ksocket_typestruct = { 489 .version = NG_ABI_VERSION, 490 .name = NG_KSOCKET_NODE_TYPE, 491 .constructor = ng_ksocket_constructor, 492 .rcvmsg = ng_ksocket_rcvmsg, 493 .shutdown = ng_ksocket_shutdown, 494 .newhook = ng_ksocket_newhook, 495 .connect = ng_ksocket_connect, 496 .rcvdata = ng_ksocket_rcvdata, 497 .disconnect = ng_ksocket_disconnect, 498 .cmdlist = ng_ksocket_cmds, 499 }; 500 NETGRAPH_INIT(ksocket, &ng_ksocket_typestruct); 501 502 #define ERROUT(x) do { error = (x); goto done; } while (0) 503 504 /************************************************************************ 505 NETGRAPH NODE STUFF 506 ************************************************************************/ 507 508 /* 509 * Node type constructor 510 * The NODE part is assumed to be all set up. 511 * There is already a reference to the node for us. 512 */ 513 static int 514 ng_ksocket_constructor(node_p node) 515 { 516 priv_p priv; 517 518 /* Allocate private structure */ 519 priv = malloc(sizeof(*priv), M_NETGRAPH_KSOCKET, M_NOWAIT | M_ZERO); 520 if (priv == NULL) 521 return (ENOMEM); 522 523 LIST_INIT(&priv->embryos); 524 /* cross link them */ 525 priv->node = node; 526 NG_NODE_SET_PRIVATE(node, priv); 527 528 /* Done */ 529 return (0); 530 } 531 532 /* 533 * Give our OK for a hook to be added. The hook name is of the 534 * form "<family>/<type>/<proto>" where the three components may 535 * be decimal numbers or else aliases from the above lists. 536 * 537 * Connecting a hook amounts to opening the socket. Disconnecting 538 * the hook closes the socket and destroys the node as well. 539 */ 540 static int 541 ng_ksocket_newhook(node_p node, hook_p hook, const char *name0) 542 { 543 struct thread *td = curthread; /* XXX broken */ 544 const priv_p priv = NG_NODE_PRIVATE(node); 545 char *s1, *s2, name[NG_HOOKSIZ]; 546 int family, type, protocol, error; 547 548 /* Check if we're already connected */ 549 if (priv->hook != NULL) 550 return (EISCONN); 551 552 if (priv->flags & KSF_CLONED) { 553 if (priv->flags & KSF_EMBRYONIC) { 554 /* Remove ourselves from our parent's embryo list */ 555 LIST_REMOVE(priv, siblings); 556 priv->flags &= ~KSF_EMBRYONIC; 557 } 558 } else { 559 /* Extract family, type, and protocol from hook name */ 560 snprintf(name, sizeof(name), "%s", name0); 561 s1 = name; 562 if ((s2 = strchr(s1, '/')) == NULL) 563 return (EINVAL); 564 *s2++ = '\0'; 565 family = ng_ksocket_parse(ng_ksocket_families, s1, 0); 566 if (family == -1) 567 return (EINVAL); 568 s1 = s2; 569 if ((s2 = strchr(s1, '/')) == NULL) 570 return (EINVAL); 571 *s2++ = '\0'; 572 type = ng_ksocket_parse(ng_ksocket_types, s1, 0); 573 if (type == -1) 574 return (EINVAL); 575 s1 = s2; 576 protocol = ng_ksocket_parse(ng_ksocket_protos, s1, family); 577 if (protocol == -1) 578 return (EINVAL); 579 580 /* Create the socket */ 581 error = socreate(family, &priv->so, type, protocol, 582 td->td_ucred, td); 583 if (error != 0) 584 return (error); 585 586 /* XXX call soreserve() ? */ 587 588 } 589 590 /* OK */ 591 priv->hook = hook; 592 593 /* 594 * In case of misconfigured routing a packet may reenter 595 * ksocket node recursively. Decouple stack to avoid possible 596 * panics about sleeping with locks held. 597 */ 598 NG_HOOK_FORCE_QUEUE(hook); 599 600 return(0); 601 } 602 603 static int 604 ng_ksocket_connect(hook_p hook) 605 { 606 node_p node = NG_HOOK_NODE(hook); 607 const priv_p priv = NG_NODE_PRIVATE(node); 608 struct socket *const so = priv->so; 609 610 /* Add our hook for incoming data and other events */ 611 SOCKBUF_LOCK(&priv->so->so_rcv); 612 soupcall_set(priv->so, SO_RCV, ng_ksocket_incoming, node); 613 SOCKBUF_UNLOCK(&priv->so->so_rcv); 614 SOCKBUF_LOCK(&priv->so->so_snd); 615 soupcall_set(priv->so, SO_SND, ng_ksocket_incoming, node); 616 SOCKBUF_UNLOCK(&priv->so->so_snd); 617 SOCK_LOCK(priv->so); 618 priv->so->so_state |= SS_NBIO; 619 SOCK_UNLOCK(priv->so); 620 /* 621 * --Original comment-- 622 * On a cloned socket we may have already received one or more 623 * upcalls which we couldn't handle without a hook. Handle 624 * those now. 625 * We cannot call the upcall function directly 626 * from here, because until this function has returned our 627 * hook isn't connected. 628 * 629 * ---meta comment for -current --- 630 * XXX This is dubius. 631 * Upcalls between the time that the hook was 632 * first created and now (on another processesor) will 633 * be earlier on the queue than the request to finalise the hook. 634 * By the time the hook is finalised, 635 * The queued upcalls will have happened and the code 636 * will have discarded them because of a lack of a hook. 637 * (socket not open). 638 * 639 * This is a bad byproduct of the complicated way in which hooks 640 * are now created (3 daisy chained async events). 641 * 642 * Since we are a netgraph operation 643 * We know that we hold a lock on this node. This forces the 644 * request we make below to be queued rather than implemented 645 * immediately which will cause the upcall function to be called a bit 646 * later. 647 * However, as we will run any waiting queued operations immediately 648 * after doing this one, if we have not finalised the other end 649 * of the hook, those queued operations will fail. 650 */ 651 if (priv->flags & KSF_CLONED) { 652 ng_send_fn(node, NULL, &ng_ksocket_incoming2, so, M_NOWAIT); 653 } 654 655 return (0); 656 } 657 658 /* 659 * Receive a control message 660 */ 661 static int 662 ng_ksocket_rcvmsg(node_p node, item_p item, hook_p lasthook) 663 { 664 struct thread *td = curthread; /* XXX broken */ 665 const priv_p priv = NG_NODE_PRIVATE(node); 666 struct socket *const so = priv->so; 667 struct ng_mesg *resp = NULL; 668 int error = 0; 669 struct ng_mesg *msg; 670 ng_ID_t raddr; 671 672 NGI_GET_MSG(item, msg); 673 switch (msg->header.typecookie) { 674 case NGM_KSOCKET_COOKIE: 675 switch (msg->header.cmd) { 676 case NGM_KSOCKET_BIND: 677 { 678 struct sockaddr *const sa 679 = (struct sockaddr *)msg->data; 680 681 /* Sanity check */ 682 if (msg->header.arglen < SADATA_OFFSET 683 || msg->header.arglen < sa->sa_len) 684 ERROUT(EINVAL); 685 if (so == NULL) 686 ERROUT(ENXIO); 687 688 /* Bind */ 689 error = sobind(so, sa, td); 690 break; 691 } 692 case NGM_KSOCKET_LISTEN: 693 { 694 /* Sanity check */ 695 if (msg->header.arglen != sizeof(int32_t)) 696 ERROUT(EINVAL); 697 if (so == NULL) 698 ERROUT(ENXIO); 699 700 /* Listen */ 701 error = solisten(so, *((int32_t *)msg->data), td); 702 break; 703 } 704 705 case NGM_KSOCKET_ACCEPT: 706 { 707 /* Sanity check */ 708 if (msg->header.arglen != 0) 709 ERROUT(EINVAL); 710 if (so == NULL) 711 ERROUT(ENXIO); 712 713 /* Make sure the socket is capable of accepting */ 714 if (!(so->so_options & SO_ACCEPTCONN)) 715 ERROUT(EINVAL); 716 if (priv->flags & KSF_ACCEPTING) 717 ERROUT(EALREADY); 718 719 error = ng_ksocket_check_accept(priv); 720 if (error != 0 && error != EWOULDBLOCK) 721 ERROUT(error); 722 723 /* 724 * If a connection is already complete, take it. 725 * Otherwise let the upcall function deal with 726 * the connection when it comes in. 727 */ 728 priv->response_token = msg->header.token; 729 raddr = priv->response_addr = NGI_RETADDR(item); 730 if (error == 0) { 731 ng_ksocket_finish_accept(priv); 732 } else 733 priv->flags |= KSF_ACCEPTING; 734 break; 735 } 736 737 case NGM_KSOCKET_CONNECT: 738 { 739 struct sockaddr *const sa 740 = (struct sockaddr *)msg->data; 741 742 /* Sanity check */ 743 if (msg->header.arglen < SADATA_OFFSET 744 || msg->header.arglen < sa->sa_len) 745 ERROUT(EINVAL); 746 if (so == NULL) 747 ERROUT(ENXIO); 748 749 /* Do connect */ 750 if ((so->so_state & SS_ISCONNECTING) != 0) 751 ERROUT(EALREADY); 752 if ((error = soconnect(so, sa, td)) != 0) { 753 so->so_state &= ~SS_ISCONNECTING; 754 ERROUT(error); 755 } 756 if ((so->so_state & SS_ISCONNECTING) != 0) { 757 /* We will notify the sender when we connect */ 758 priv->response_token = msg->header.token; 759 raddr = priv->response_addr = NGI_RETADDR(item); 760 priv->flags |= KSF_CONNECTING; 761 ERROUT(EINPROGRESS); 762 } 763 break; 764 } 765 766 case NGM_KSOCKET_GETNAME: 767 case NGM_KSOCKET_GETPEERNAME: 768 { 769 int (*func)(struct socket *so, struct sockaddr **nam); 770 struct sockaddr *sa = NULL; 771 int len; 772 773 /* Sanity check */ 774 if (msg->header.arglen != 0) 775 ERROUT(EINVAL); 776 if (so == NULL) 777 ERROUT(ENXIO); 778 779 /* Get function */ 780 if (msg->header.cmd == NGM_KSOCKET_GETPEERNAME) { 781 if ((so->so_state 782 & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) 783 ERROUT(ENOTCONN); 784 func = so->so_proto->pr_usrreqs->pru_peeraddr; 785 } else 786 func = so->so_proto->pr_usrreqs->pru_sockaddr; 787 788 /* Get local or peer address */ 789 if ((error = (*func)(so, &sa)) != 0) 790 goto bail; 791 len = (sa == NULL) ? 0 : sa->sa_len; 792 793 /* Send it back in a response */ 794 NG_MKRESPONSE(resp, msg, len, M_NOWAIT); 795 if (resp == NULL) { 796 error = ENOMEM; 797 goto bail; 798 } 799 bcopy(sa, resp->data, len); 800 801 bail: 802 /* Cleanup */ 803 if (sa != NULL) 804 free(sa, M_SONAME); 805 break; 806 } 807 808 case NGM_KSOCKET_GETOPT: 809 { 810 struct ng_ksocket_sockopt *ksopt = 811 (struct ng_ksocket_sockopt *)msg->data; 812 struct sockopt sopt; 813 814 /* Sanity check */ 815 if (msg->header.arglen != sizeof(*ksopt)) 816 ERROUT(EINVAL); 817 if (so == NULL) 818 ERROUT(ENXIO); 819 820 /* Get response with room for option value */ 821 NG_MKRESPONSE(resp, msg, sizeof(*ksopt) 822 + NG_KSOCKET_MAX_OPTLEN, M_NOWAIT); 823 if (resp == NULL) 824 ERROUT(ENOMEM); 825 826 /* Get socket option, and put value in the response */ 827 sopt.sopt_dir = SOPT_GET; 828 sopt.sopt_level = ksopt->level; 829 sopt.sopt_name = ksopt->name; 830 sopt.sopt_td = NULL; 831 sopt.sopt_valsize = NG_KSOCKET_MAX_OPTLEN; 832 ksopt = (struct ng_ksocket_sockopt *)resp->data; 833 sopt.sopt_val = ksopt->value; 834 if ((error = sogetopt(so, &sopt)) != 0) { 835 NG_FREE_MSG(resp); 836 break; 837 } 838 839 /* Set actual value length */ 840 resp->header.arglen = sizeof(*ksopt) 841 + sopt.sopt_valsize; 842 break; 843 } 844 845 case NGM_KSOCKET_SETOPT: 846 { 847 struct ng_ksocket_sockopt *const ksopt = 848 (struct ng_ksocket_sockopt *)msg->data; 849 const int valsize = msg->header.arglen - sizeof(*ksopt); 850 struct sockopt sopt; 851 852 /* Sanity check */ 853 if (valsize < 0) 854 ERROUT(EINVAL); 855 if (so == NULL) 856 ERROUT(ENXIO); 857 858 /* Set socket option */ 859 sopt.sopt_dir = SOPT_SET; 860 sopt.sopt_level = ksopt->level; 861 sopt.sopt_name = ksopt->name; 862 sopt.sopt_val = ksopt->value; 863 sopt.sopt_valsize = valsize; 864 sopt.sopt_td = NULL; 865 error = sosetopt(so, &sopt); 866 break; 867 } 868 869 default: 870 error = EINVAL; 871 break; 872 } 873 break; 874 default: 875 error = EINVAL; 876 break; 877 } 878 done: 879 NG_RESPOND_MSG(error, node, item, resp); 880 NG_FREE_MSG(msg); 881 return (error); 882 } 883 884 /* 885 * Receive incoming data on our hook. Send it out the socket. 886 */ 887 static int 888 ng_ksocket_rcvdata(hook_p hook, item_p item) 889 { 890 struct thread *td = curthread; /* XXX broken */ 891 const node_p node = NG_HOOK_NODE(hook); 892 const priv_p priv = NG_NODE_PRIVATE(node); 893 struct socket *const so = priv->so; 894 struct sockaddr *sa = NULL; 895 int error; 896 struct mbuf *m; 897 #ifdef ALIGNED_POINTER 898 struct mbuf *n; 899 #endif /* ALIGNED_POINTER */ 900 struct sa_tag *stag; 901 902 /* Extract data */ 903 NGI_GET_M(item, m); 904 NG_FREE_ITEM(item); 905 #ifdef ALIGNED_POINTER 906 if (!ALIGNED_POINTER(mtod(m, caddr_t), uint32_t)) { 907 n = m_defrag(m, M_NOWAIT); 908 if (n == NULL) { 909 m_freem(m); 910 return (ENOBUFS); 911 } 912 m = n; 913 } 914 #endif /* ALIGNED_POINTER */ 915 /* 916 * Look if socket address is stored in packet tags. 917 * If sockaddr is ours, or provided by a third party (zero id), 918 * then we accept it. 919 */ 920 if (((stag = (struct sa_tag *)m_tag_locate(m, NGM_KSOCKET_COOKIE, 921 NG_KSOCKET_TAG_SOCKADDR, NULL)) != NULL) && 922 (stag->id == NG_NODE_ID(node) || stag->id == 0)) 923 sa = &stag->sa; 924 925 /* Reset specific mbuf flags to prevent addressing problems. */ 926 m->m_flags &= ~(M_BCAST|M_MCAST); 927 928 /* Send packet */ 929 error = sosend(so, sa, 0, m, 0, 0, td); 930 931 return (error); 932 } 933 934 /* 935 * Destroy node 936 */ 937 static int 938 ng_ksocket_shutdown(node_p node) 939 { 940 const priv_p priv = NG_NODE_PRIVATE(node); 941 priv_p embryo; 942 943 /* Close our socket (if any) */ 944 if (priv->so != NULL) { 945 SOCKBUF_LOCK(&priv->so->so_rcv); 946 soupcall_clear(priv->so, SO_RCV); 947 SOCKBUF_UNLOCK(&priv->so->so_rcv); 948 SOCKBUF_LOCK(&priv->so->so_snd); 949 soupcall_clear(priv->so, SO_SND); 950 SOCKBUF_UNLOCK(&priv->so->so_snd); 951 soclose(priv->so); 952 priv->so = NULL; 953 } 954 955 /* If we are an embryo, take ourselves out of the parent's list */ 956 if (priv->flags & KSF_EMBRYONIC) { 957 LIST_REMOVE(priv, siblings); 958 priv->flags &= ~KSF_EMBRYONIC; 959 } 960 961 /* Remove any embryonic children we have */ 962 while (!LIST_EMPTY(&priv->embryos)) { 963 embryo = LIST_FIRST(&priv->embryos); 964 ng_rmnode_self(embryo->node); 965 } 966 967 /* Take down netgraph node */ 968 bzero(priv, sizeof(*priv)); 969 free(priv, M_NETGRAPH_KSOCKET); 970 NG_NODE_SET_PRIVATE(node, NULL); 971 NG_NODE_UNREF(node); /* let the node escape */ 972 return (0); 973 } 974 975 /* 976 * Hook disconnection 977 */ 978 static int 979 ng_ksocket_disconnect(hook_p hook) 980 { 981 KASSERT(NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0, 982 ("%s: numhooks=%d?", __func__, 983 NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)))); 984 if (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))) 985 ng_rmnode_self(NG_HOOK_NODE(hook)); 986 return (0); 987 } 988 989 /************************************************************************ 990 HELPER STUFF 991 ************************************************************************/ 992 /* 993 * You should not "just call" a netgraph node function from an external 994 * asynchronous event. This is because in doing so you are ignoring the 995 * locking on the netgraph nodes. Instead call your function via ng_send_fn(). 996 * This will call the function you chose, but will first do all the 997 * locking rigmarole. Your function MAY only be called at some distant future 998 * time (several millisecs away) so don't give it any arguments 999 * that may be revoked soon (e.g. on your stack). 1000 * 1001 * To decouple stack, we use queue version of ng_send_fn(). 1002 */ 1003 1004 static int 1005 ng_ksocket_incoming(struct socket *so, void *arg, int waitflag) 1006 { 1007 const node_p node = arg; 1008 const priv_p priv = NG_NODE_PRIVATE(node); 1009 int wait = ((waitflag & M_WAITOK) ? NG_WAITOK : 0) | NG_QUEUE; 1010 1011 /* 1012 * Even if node is not locked, as soon as we are called, we assume 1013 * it exist and it's private area is valid. With some care we can 1014 * access it. Mark node that incoming event for it was sent to 1015 * avoid unneded queue trashing. 1016 */ 1017 if (atomic_cmpset_int(&priv->fn_sent, 0, 1) && 1018 ng_send_fn1(node, NULL, &ng_ksocket_incoming2, so, 0, wait)) { 1019 atomic_store_rel_int(&priv->fn_sent, 0); 1020 } 1021 return (SU_OK); 1022 } 1023 1024 1025 /* 1026 * When incoming data is appended to the socket, we get notified here. 1027 * This is also called whenever a significant event occurs for the socket. 1028 * Our original caller may have queued this even some time ago and 1029 * we cannot trust that he even still exists. The node however is being 1030 * held with a reference by the queueing code and guarantied to be valid. 1031 */ 1032 static void 1033 ng_ksocket_incoming2(node_p node, hook_p hook, void *arg1, int arg2) 1034 { 1035 struct socket *so = arg1; 1036 const priv_p priv = NG_NODE_PRIVATE(node); 1037 struct ng_mesg *response; 1038 int error; 1039 1040 KASSERT(so == priv->so, ("%s: wrong socket", __func__)); 1041 1042 /* Allow next incoming event to be queued. */ 1043 atomic_store_rel_int(&priv->fn_sent, 0); 1044 1045 /* Check whether a pending connect operation has completed */ 1046 if (priv->flags & KSF_CONNECTING) { 1047 if ((error = so->so_error) != 0) { 1048 so->so_error = 0; 1049 so->so_state &= ~SS_ISCONNECTING; 1050 } 1051 if (!(so->so_state & SS_ISCONNECTING)) { 1052 NG_MKMESSAGE(response, NGM_KSOCKET_COOKIE, 1053 NGM_KSOCKET_CONNECT, sizeof(int32_t), M_NOWAIT); 1054 if (response != NULL) { 1055 response->header.flags |= NGF_RESP; 1056 response->header.token = priv->response_token; 1057 *(int32_t *)response->data = error; 1058 /* 1059 * send an async "response" message 1060 * to the node that set us up 1061 * (if it still exists) 1062 */ 1063 NG_SEND_MSG_ID(error, node, 1064 response, priv->response_addr, 0); 1065 } 1066 priv->flags &= ~KSF_CONNECTING; 1067 } 1068 } 1069 1070 /* Check whether a pending accept operation has completed */ 1071 if (priv->flags & KSF_ACCEPTING) { 1072 error = ng_ksocket_check_accept(priv); 1073 if (error != EWOULDBLOCK) 1074 priv->flags &= ~KSF_ACCEPTING; 1075 if (error == 0) 1076 ng_ksocket_finish_accept(priv); 1077 } 1078 1079 /* 1080 * If we don't have a hook, we must handle data events later. When 1081 * the hook gets created and is connected, this upcall function 1082 * will be called again. 1083 */ 1084 if (priv->hook == NULL) 1085 return; 1086 1087 /* Read and forward available mbufs. */ 1088 while (1) { 1089 struct uio uio; 1090 struct sockaddr *sa; 1091 struct mbuf *m; 1092 int flags; 1093 1094 /* Try to get next packet from socket. */ 1095 uio.uio_td = NULL; 1096 uio.uio_resid = IP_MAXPACKET; 1097 flags = MSG_DONTWAIT; 1098 sa = NULL; 1099 if ((error = soreceive(so, (so->so_state & SS_ISCONNECTED) ? 1100 NULL : &sa, &uio, &m, NULL, &flags)) != 0) 1101 break; 1102 1103 /* See if we got anything. */ 1104 if (flags & MSG_TRUNC) { 1105 m_freem(m); 1106 m = NULL; 1107 } 1108 if (m == NULL) { 1109 if (sa != NULL) 1110 free(sa, M_SONAME); 1111 break; 1112 } 1113 1114 KASSERT(m->m_nextpkt == NULL, ("%s: nextpkt", __func__)); 1115 1116 /* 1117 * Stream sockets do not have packet boundaries, so 1118 * we have to allocate a header mbuf and attach the 1119 * stream of data to it. 1120 */ 1121 if (so->so_type == SOCK_STREAM) { 1122 struct mbuf *mh; 1123 1124 mh = m_gethdr(M_NOWAIT, MT_DATA); 1125 if (mh == NULL) { 1126 m_freem(m); 1127 if (sa != NULL) 1128 free(sa, M_SONAME); 1129 break; 1130 } 1131 1132 mh->m_next = m; 1133 for (; m; m = m->m_next) 1134 mh->m_pkthdr.len += m->m_len; 1135 m = mh; 1136 } 1137 1138 /* Put peer's socket address (if any) into a tag */ 1139 if (sa != NULL) { 1140 struct sa_tag *stag; 1141 1142 stag = (struct sa_tag *)m_tag_alloc(NGM_KSOCKET_COOKIE, 1143 NG_KSOCKET_TAG_SOCKADDR, sizeof(ng_ID_t) + 1144 sa->sa_len, M_NOWAIT); 1145 if (stag == NULL) { 1146 free(sa, M_SONAME); 1147 goto sendit; 1148 } 1149 bcopy(sa, &stag->sa, sa->sa_len); 1150 free(sa, M_SONAME); 1151 stag->id = NG_NODE_ID(node); 1152 m_tag_prepend(m, &stag->tag); 1153 } 1154 1155 sendit: /* Forward data with optional peer sockaddr as packet tag */ 1156 NG_SEND_DATA_ONLY(error, priv->hook, m); 1157 } 1158 1159 /* 1160 * If the peer has closed the connection, forward a 0-length mbuf 1161 * to indicate end-of-file. 1162 */ 1163 if (so->so_rcv.sb_state & SBS_CANTRCVMORE && 1164 !(priv->flags & KSF_EOFSEEN)) { 1165 struct mbuf *m; 1166 1167 m = m_gethdr(M_NOWAIT, MT_DATA); 1168 if (m != NULL) 1169 NG_SEND_DATA_ONLY(error, priv->hook, m); 1170 priv->flags |= KSF_EOFSEEN; 1171 } 1172 } 1173 1174 /* 1175 * Check for a completed incoming connection and return 0 if one is found. 1176 * Otherwise return the appropriate error code. 1177 */ 1178 static int 1179 ng_ksocket_check_accept(priv_p priv) 1180 { 1181 struct socket *const head = priv->so; 1182 int error; 1183 1184 if ((error = head->so_error) != 0) { 1185 head->so_error = 0; 1186 return error; 1187 } 1188 /* Unlocked read. */ 1189 if (TAILQ_EMPTY(&head->so_comp)) { 1190 if (head->so_rcv.sb_state & SBS_CANTRCVMORE) 1191 return ECONNABORTED; 1192 return EWOULDBLOCK; 1193 } 1194 return 0; 1195 } 1196 1197 /* 1198 * Handle the first completed incoming connection, assumed to be already 1199 * on the socket's so_comp queue. 1200 */ 1201 static void 1202 ng_ksocket_finish_accept(priv_p priv) 1203 { 1204 struct socket *const head = priv->so; 1205 struct socket *so; 1206 struct sockaddr *sa = NULL; 1207 struct ng_mesg *resp; 1208 struct ng_ksocket_accept *resp_data; 1209 node_p node; 1210 priv_p priv2; 1211 int len; 1212 int error; 1213 1214 ACCEPT_LOCK(); 1215 so = TAILQ_FIRST(&head->so_comp); 1216 if (so == NULL) { /* Should never happen */ 1217 ACCEPT_UNLOCK(); 1218 return; 1219 } 1220 TAILQ_REMOVE(&head->so_comp, so, so_list); 1221 head->so_qlen--; 1222 so->so_qstate &= ~SQ_COMP; 1223 so->so_head = NULL; 1224 SOCK_LOCK(so); 1225 soref(so); 1226 so->so_state |= SS_NBIO; 1227 SOCK_UNLOCK(so); 1228 ACCEPT_UNLOCK(); 1229 1230 /* XXX KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0); */ 1231 1232 soaccept(so, &sa); 1233 1234 len = OFFSETOF(struct ng_ksocket_accept, addr); 1235 if (sa != NULL) 1236 len += sa->sa_len; 1237 1238 NG_MKMESSAGE(resp, NGM_KSOCKET_COOKIE, NGM_KSOCKET_ACCEPT, len, 1239 M_NOWAIT); 1240 if (resp == NULL) { 1241 soclose(so); 1242 goto out; 1243 } 1244 resp->header.flags |= NGF_RESP; 1245 resp->header.token = priv->response_token; 1246 1247 /* Clone a ksocket node to wrap the new socket */ 1248 error = ng_make_node_common(&ng_ksocket_typestruct, &node); 1249 if (error) { 1250 free(resp, M_NETGRAPH); 1251 soclose(so); 1252 goto out; 1253 } 1254 1255 if (ng_ksocket_constructor(node) != 0) { 1256 NG_NODE_UNREF(node); 1257 free(resp, M_NETGRAPH); 1258 soclose(so); 1259 goto out; 1260 } 1261 1262 priv2 = NG_NODE_PRIVATE(node); 1263 priv2->so = so; 1264 priv2->flags |= KSF_CLONED | KSF_EMBRYONIC; 1265 1266 /* 1267 * Insert the cloned node into a list of embryonic children 1268 * on the parent node. When a hook is created on the cloned 1269 * node it will be removed from this list. When the parent 1270 * is destroyed it will destroy any embryonic children it has. 1271 */ 1272 LIST_INSERT_HEAD(&priv->embryos, priv2, siblings); 1273 1274 SOCKBUF_LOCK(&so->so_rcv); 1275 soupcall_set(so, SO_RCV, ng_ksocket_incoming, node); 1276 SOCKBUF_UNLOCK(&so->so_rcv); 1277 SOCKBUF_LOCK(&so->so_snd); 1278 soupcall_set(so, SO_SND, ng_ksocket_incoming, node); 1279 SOCKBUF_UNLOCK(&so->so_snd); 1280 1281 /* Fill in the response data and send it or return it to the caller */ 1282 resp_data = (struct ng_ksocket_accept *)resp->data; 1283 resp_data->nodeid = NG_NODE_ID(node); 1284 if (sa != NULL) 1285 bcopy(sa, &resp_data->addr, sa->sa_len); 1286 NG_SEND_MSG_ID(error, node, resp, priv->response_addr, 0); 1287 1288 out: 1289 if (sa != NULL) 1290 free(sa, M_SONAME); 1291 } 1292 1293 /* 1294 * Parse out either an integer value or an alias. 1295 */ 1296 static int 1297 ng_ksocket_parse(const struct ng_ksocket_alias *aliases, 1298 const char *s, int family) 1299 { 1300 int k, val; 1301 char *eptr; 1302 1303 /* Try aliases */ 1304 for (k = 0; aliases[k].name != NULL; k++) { 1305 if (strcmp(s, aliases[k].name) == 0 1306 && aliases[k].family == family) 1307 return aliases[k].value; 1308 } 1309 1310 /* Try parsing as a number */ 1311 val = (int)strtoul(s, &eptr, 10); 1312 if (val < 0 || *eptr != '\0') 1313 return (-1); 1314 return (val); 1315 } 1316
Cache object: c645af86a58ed606cc292c6e9d11012e
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