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 * $FreeBSD$ 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#include <netatalk/at.h> 71 72#ifdef NG_SEPARATE_MALLOC 73static MALLOC_DEFINE(M_NETGRAPH_KSOCKET, "netgraph_ksock", 74 "netgraph ksock node"); 75#else 76#define M_NETGRAPH_KSOCKET M_NETGRAPH 77#endif 78 79#define OFFSETOF(s, e) ((char *)&((s *)0)->e - (char *)((s *)0)) 80#define SADATA_OFFSET (OFFSETOF(struct sockaddr, sa_data)) 81 82/* Node private data */ 83struct ng_ksocket_private { 84 node_p node; 85 hook_p hook; 86 struct socket *so; 87 int fn_sent; /* FN call on incoming event was sent */ 88 LIST_HEAD(, ng_ksocket_private) embryos; 89 LIST_ENTRY(ng_ksocket_private) siblings; 90 u_int32_t flags; 91 u_int32_t response_token; 92 ng_ID_t response_addr; 93}; 94typedef struct ng_ksocket_private *priv_p; 95 96/* Flags for priv_p */ 97#define KSF_CONNECTING 0x00000001 /* Waiting for connection complete */ 98#define KSF_ACCEPTING 0x00000002 /* Waiting for accept complete */ 99#define KSF_EOFSEEN 0x00000004 /* Have sent 0-length EOF mbuf */ 100#define KSF_CLONED 0x00000008 /* Cloned from an accepting socket */ 101#define KSF_EMBRYONIC 0x00000010 /* Cloned node with no hooks yet */ 102 103/* Netgraph node methods */ 104static ng_constructor_t ng_ksocket_constructor; 105static ng_rcvmsg_t ng_ksocket_rcvmsg; 106static ng_shutdown_t ng_ksocket_shutdown; 107static ng_newhook_t ng_ksocket_newhook; 108static ng_rcvdata_t ng_ksocket_rcvdata; 109static ng_connect_t ng_ksocket_connect; 110static ng_disconnect_t ng_ksocket_disconnect; 111 112/* Alias structure */ 113struct ng_ksocket_alias { 114 const char *name; 115 const int value; 116 const int family; 117}; 118 119/* Protocol family aliases */ 120static const struct ng_ksocket_alias ng_ksocket_families[] = { 121 { "local", PF_LOCAL }, 122 { "inet", PF_INET }, 123 { "inet6", PF_INET6 }, 124 { "atalk", PF_APPLETALK }, 125 { "ipx", PF_IPX }, 126 { "atm", PF_ATM }, 127 { NULL, -1 }, 128}; 129 130/* Socket type aliases */ 131static const struct ng_ksocket_alias ng_ksocket_types[] = { 132 { "stream", SOCK_STREAM }, 133 { "dgram", SOCK_DGRAM }, 134 { "raw", SOCK_RAW }, 135 { "rdm", SOCK_RDM }, 136 { "seqpacket", SOCK_SEQPACKET }, 137 { NULL, -1 }, 138}; 139 140/* Protocol aliases */ 141static const struct ng_ksocket_alias ng_ksocket_protos[] = { 142 { "ip", IPPROTO_IP, PF_INET }, 143 { "raw", IPPROTO_RAW, PF_INET }, 144 { "icmp", IPPROTO_ICMP, PF_INET }, 145 { "igmp", IPPROTO_IGMP, PF_INET }, 146 { "tcp", IPPROTO_TCP, PF_INET }, 147 { "udp", IPPROTO_UDP, PF_INET }, 148 { "gre", IPPROTO_GRE, PF_INET }, 149 { "esp", IPPROTO_ESP, PF_INET }, 150 { "ah", IPPROTO_AH, PF_INET }, 151 { "swipe", IPPROTO_SWIPE, PF_INET }, 152 { "encap", IPPROTO_ENCAP, PF_INET }, 153 { "divert", IPPROTO_DIVERT, PF_INET }, 154 { "pim", IPPROTO_PIM, PF_INET }, 155 { "ddp", ATPROTO_DDP, PF_APPLETALK }, 156 { "aarp", ATPROTO_AARP, PF_APPLETALK }, 157 { NULL, -1 }, 158}; 159 160/* Helper functions */ 161static int ng_ksocket_check_accept(priv_p); 162static void ng_ksocket_finish_accept(priv_p); 163static int ng_ksocket_incoming(struct socket *so, void *arg, int waitflag); 164static int ng_ksocket_parse(const struct ng_ksocket_alias *aliases, 165 const char *s, int family); 166static void ng_ksocket_incoming2(node_p node, hook_p hook, 167 void *arg1, int arg2); 168 169/************************************************************************ 170 STRUCT SOCKADDR PARSE TYPE 171 ************************************************************************/ 172 173/* Get the length of the data portion of a generic struct sockaddr */ 174static int 175ng_parse_generic_sockdata_getLength(const struct ng_parse_type *type, 176 const u_char *start, const u_char *buf) 177{ 178 const struct sockaddr *sa; 179 180 sa = (const struct sockaddr *)(buf - SADATA_OFFSET); 181 return (sa->sa_len < SADATA_OFFSET) ? 0 : sa->sa_len - SADATA_OFFSET; 182} 183 184/* Type for the variable length data portion of a generic struct sockaddr */ 185static const struct ng_parse_type ng_ksocket_generic_sockdata_type = { 186 &ng_parse_bytearray_type, 187 &ng_parse_generic_sockdata_getLength 188}; 189 190/* Type for a generic struct sockaddr */ 191static const struct ng_parse_struct_field 192 ng_parse_generic_sockaddr_type_fields[] = { 193 { "len", &ng_parse_uint8_type }, 194 { "family", &ng_parse_uint8_type }, 195 { "data", &ng_ksocket_generic_sockdata_type }, 196 { NULL } 197}; 198static const struct ng_parse_type ng_ksocket_generic_sockaddr_type = { 199 &ng_parse_struct_type, 200 &ng_parse_generic_sockaddr_type_fields 201}; 202 203/* Convert a struct sockaddr from ASCII to binary. If its a protocol 204 family that we specially handle, do that, otherwise defer to the 205 generic parse type ng_ksocket_generic_sockaddr_type. */ 206static int 207ng_ksocket_sockaddr_parse(const struct ng_parse_type *type, 208 const char *s, int *off, const u_char *const start, 209 u_char *const buf, int *buflen) 210{ 211 struct sockaddr *const sa = (struct sockaddr *)buf; 212 enum ng_parse_token tok; 213 char fambuf[32]; 214 int family, len; 215 char *t; 216 217 /* If next token is a left curly brace, use generic parse type */ 218 if ((tok = ng_parse_get_token(s, off, &len)) == T_LBRACE) { 219 return (*ng_ksocket_generic_sockaddr_type.supertype->parse) 220 (&ng_ksocket_generic_sockaddr_type, 221 s, off, start, buf, buflen); 222 } 223 224 /* Get socket address family followed by a slash */ 225 while (isspace(s[*off])) 226 (*off)++; 227 if ((t = strchr(s + *off, '/')) == NULL) 228 return (EINVAL); 229 if ((len = t - (s + *off)) > sizeof(fambuf) - 1) 230 return (EINVAL); 231 strncpy(fambuf, s + *off, len); 232 fambuf[len] = '\0'; 233 *off += len + 1; 234 if ((family = ng_ksocket_parse(ng_ksocket_families, fambuf, 0)) == -1) 235 return (EINVAL); 236 237 /* Set family */ 238 if (*buflen < SADATA_OFFSET) 239 return (ERANGE); 240 sa->sa_family = family; 241 242 /* Set family-specific data and length */ 243 switch (sa->sa_family) { 244 case PF_LOCAL: /* Get pathname */ 245 { 246 const int pathoff = OFFSETOF(struct sockaddr_un, sun_path); 247 struct sockaddr_un *const sun = (struct sockaddr_un *)sa; 248 int toklen, pathlen; 249 char *path; 250 251 if ((path = ng_get_string_token(s, off, &toklen, NULL)) == NULL) 252 return (EINVAL); 253 pathlen = strlen(path); 254 if (pathlen > SOCK_MAXADDRLEN) { 255 free(path, M_NETGRAPH_KSOCKET); 256 return (E2BIG); 257 } 258 if (*buflen < pathoff + pathlen) { 259 free(path, M_NETGRAPH_KSOCKET); 260 return (ERANGE); 261 } 262 *off += toklen; 263 bcopy(path, sun->sun_path, pathlen); 264 sun->sun_len = pathoff + pathlen; 265 free(path, M_NETGRAPH_KSOCKET); 266 break; 267 } 268 269 case PF_INET: /* Get an IP address with optional port */ 270 { 271 struct sockaddr_in *const sin = (struct sockaddr_in *)sa; 272 int i; 273 274 /* Parse this: <ipaddress>[:port] */ 275 for (i = 0; i < 4; i++) { 276 u_long val; 277 char *eptr; 278 279 val = strtoul(s + *off, &eptr, 10); 280 if (val > 0xff || eptr == s + *off) 281 return (EINVAL); 282 *off += (eptr - (s + *off)); 283 ((u_char *)&sin->sin_addr)[i] = (u_char)val; 284 if (i < 3) { 285 if (s[*off] != '.') 286 return (EINVAL); 287 (*off)++; 288 } else if (s[*off] == ':') { 289 (*off)++; 290 val = strtoul(s + *off, &eptr, 10); 291 if (val > 0xffff || eptr == s + *off) 292 return (EINVAL); 293 *off += (eptr - (s + *off)); 294 sin->sin_port = htons(val); 295 } else 296 sin->sin_port = 0; 297 } 298 bzero(&sin->sin_zero, sizeof(sin->sin_zero)); 299 sin->sin_len = sizeof(*sin); 300 break; 301 } 302 303#if 0 304 case PF_APPLETALK: /* XXX implement these someday */ 305 case PF_INET6: 306 case PF_IPX: 307#endif 308 309 default: 310 return (EINVAL); 311 } 312 313 /* Done */ 314 *buflen = sa->sa_len; 315 return (0); 316} 317 318/* Convert a struct sockaddr from binary to ASCII */ 319static int 320ng_ksocket_sockaddr_unparse(const struct ng_parse_type *type, 321 const u_char *data, int *off, char *cbuf, int cbuflen) 322{ 323 const struct sockaddr *sa = (const struct sockaddr *)(data + *off); 324 int slen = 0; 325 326 /* Output socket address, either in special or generic format */ 327 switch (sa->sa_family) { 328 case PF_LOCAL: 329 { 330 const int pathoff = OFFSETOF(struct sockaddr_un, sun_path); 331 const struct sockaddr_un *sun = (const struct sockaddr_un *)sa; 332 const int pathlen = sun->sun_len - pathoff; 333 char pathbuf[SOCK_MAXADDRLEN + 1]; 334 char *pathtoken; 335 336 bcopy(sun->sun_path, pathbuf, pathlen); 337 if ((pathtoken = ng_encode_string(pathbuf, pathlen)) == NULL) 338 return (ENOMEM); 339 slen += snprintf(cbuf, cbuflen, "local/%s", pathtoken); 340 free(pathtoken, M_NETGRAPH_KSOCKET); 341 if (slen >= cbuflen) 342 return (ERANGE); 343 *off += sun->sun_len; 344 return (0); 345 } 346 347 case PF_INET: 348 { 349 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; 350 351 slen += snprintf(cbuf, cbuflen, "inet/%d.%d.%d.%d", 352 ((const u_char *)&sin->sin_addr)[0], 353 ((const u_char *)&sin->sin_addr)[1], 354 ((const u_char *)&sin->sin_addr)[2], 355 ((const u_char *)&sin->sin_addr)[3]); 356 if (sin->sin_port != 0) { 357 slen += snprintf(cbuf + strlen(cbuf), 358 cbuflen - strlen(cbuf), ":%d", 359 (u_int)ntohs(sin->sin_port)); 360 } 361 if (slen >= cbuflen) 362 return (ERANGE); 363 *off += sizeof(*sin); 364 return(0); 365 } 366 367#if 0 368 case PF_APPLETALK: /* XXX implement these someday */ 369 case PF_INET6: 370 case PF_IPX: 371#endif 372 373 default: 374 return (*ng_ksocket_generic_sockaddr_type.supertype->unparse) 375 (&ng_ksocket_generic_sockaddr_type, 376 data, off, cbuf, cbuflen); 377 } 378} 379 380/* Parse type for struct sockaddr */ 381static const struct ng_parse_type ng_ksocket_sockaddr_type = { 382 NULL, 383 NULL, 384 NULL, 385 &ng_ksocket_sockaddr_parse, 386 &ng_ksocket_sockaddr_unparse, 387 NULL /* no such thing as a default struct sockaddr */ 388}; 389 390/************************************************************************ 391 STRUCT NG_KSOCKET_SOCKOPT PARSE TYPE 392 ************************************************************************/ 393 394/* Get length of the struct ng_ksocket_sockopt value field, which is the 395 just the excess of the message argument portion over the length of 396 the struct ng_ksocket_sockopt. */ 397static int 398ng_parse_sockoptval_getLength(const struct ng_parse_type *type, 399 const u_char *start, const u_char *buf) 400{ 401 static const int offset = OFFSETOF(struct ng_ksocket_sockopt, value); 402 const struct ng_ksocket_sockopt *sopt; 403 const struct ng_mesg *msg; 404 405 sopt = (const struct ng_ksocket_sockopt *)(buf - offset); 406 msg = (const struct ng_mesg *)((const u_char *)sopt - sizeof(*msg)); 407 return msg->header.arglen - sizeof(*sopt); 408} 409 410/* Parse type for the option value part of a struct ng_ksocket_sockopt 411 XXX Eventually, we should handle the different socket options specially. 412 XXX This would avoid byte order problems, eg an integer value of 1 is 413 XXX going to be "[1]" for little endian or "[3=1]" for big endian. */ 414static const struct ng_parse_type ng_ksocket_sockoptval_type = { 415 &ng_parse_bytearray_type, 416 &ng_parse_sockoptval_getLength 417}; 418 419/* Parse type for struct ng_ksocket_sockopt */ 420static const struct ng_parse_struct_field ng_ksocket_sockopt_type_fields[] 421 = NG_KSOCKET_SOCKOPT_INFO(&ng_ksocket_sockoptval_type); 422static const struct ng_parse_type ng_ksocket_sockopt_type = { 423 &ng_parse_struct_type, 424 &ng_ksocket_sockopt_type_fields 425}; 426 427/* Parse type for struct ng_ksocket_accept */ 428static const struct ng_parse_struct_field ng_ksocket_accept_type_fields[] 429 = NGM_KSOCKET_ACCEPT_INFO; 430static const struct ng_parse_type ng_ksocket_accept_type = { 431 &ng_parse_struct_type, 432 &ng_ksocket_accept_type_fields 433}; 434 435/* List of commands and how to convert arguments to/from ASCII */ 436static const struct ng_cmdlist ng_ksocket_cmds[] = { 437 { 438 NGM_KSOCKET_COOKIE, 439 NGM_KSOCKET_BIND, 440 "bind", 441 &ng_ksocket_sockaddr_type, 442 NULL 443 }, 444 { 445 NGM_KSOCKET_COOKIE, 446 NGM_KSOCKET_LISTEN, 447 "listen", 448 &ng_parse_int32_type, 449 NULL 450 }, 451 { 452 NGM_KSOCKET_COOKIE, 453 NGM_KSOCKET_ACCEPT, 454 "accept", 455 NULL, 456 &ng_ksocket_accept_type 457 }, 458 { 459 NGM_KSOCKET_COOKIE, 460 NGM_KSOCKET_CONNECT, 461 "connect", 462 &ng_ksocket_sockaddr_type, 463 &ng_parse_int32_type 464 }, 465 { 466 NGM_KSOCKET_COOKIE, 467 NGM_KSOCKET_GETNAME, 468 "getname", 469 NULL, 470 &ng_ksocket_sockaddr_type 471 }, 472 { 473 NGM_KSOCKET_COOKIE, 474 NGM_KSOCKET_GETPEERNAME, 475 "getpeername", 476 NULL, 477 &ng_ksocket_sockaddr_type 478 }, 479 { 480 NGM_KSOCKET_COOKIE, 481 NGM_KSOCKET_SETOPT, 482 "setopt", 483 &ng_ksocket_sockopt_type, 484 NULL 485 }, 486 { 487 NGM_KSOCKET_COOKIE, 488 NGM_KSOCKET_GETOPT, 489 "getopt", 490 &ng_ksocket_sockopt_type, 491 &ng_ksocket_sockopt_type 492 }, 493 { 0 } 494}; 495 496/* Node type descriptor */ 497static struct ng_type ng_ksocket_typestruct = { 498 .version = NG_ABI_VERSION, 499 .name = NG_KSOCKET_NODE_TYPE, 500 .constructor = ng_ksocket_constructor, 501 .rcvmsg = ng_ksocket_rcvmsg, 502 .shutdown = ng_ksocket_shutdown, 503 .newhook = ng_ksocket_newhook, 504 .connect = ng_ksocket_connect, 505 .rcvdata = ng_ksocket_rcvdata, 506 .disconnect = ng_ksocket_disconnect, 507 .cmdlist = ng_ksocket_cmds, 508}; 509NETGRAPH_INIT(ksocket, &ng_ksocket_typestruct); 510 511#define ERROUT(x) do { error = (x); goto done; } while (0) 512 513/************************************************************************ 514 NETGRAPH NODE STUFF 515 ************************************************************************/ 516 517/* 518 * Node type constructor 519 * The NODE part is assumed to be all set up. 520 * There is already a reference to the node for us. 521 */ 522static int 523ng_ksocket_constructor(node_p node) 524{ 525 priv_p priv; 526 527 /* Allocate private structure */ 528 priv = malloc(sizeof(*priv), M_NETGRAPH_KSOCKET, M_NOWAIT | M_ZERO); 529 if (priv == NULL) 530 return (ENOMEM); 531 532 LIST_INIT(&priv->embryos); 533 /* cross link them */ 534 priv->node = node; 535 NG_NODE_SET_PRIVATE(node, priv); 536 537 /* Done */ 538 return (0); 539} 540 541/* 542 * Give our OK for a hook to be added. The hook name is of the 543 * form "<family>/<type>/<proto>" where the three components may 544 * be decimal numbers or else aliases from the above lists. 545 * 546 * Connecting a hook amounts to opening the socket. Disconnecting 547 * the hook closes the socket and destroys the node as well. 548 */ 549static int 550ng_ksocket_newhook(node_p node, hook_p hook, const char *name0) 551{ 552 struct thread *td = curthread; /* XXX broken */ 553 const priv_p priv = NG_NODE_PRIVATE(node); 554 char *s1, *s2, name[NG_HOOKSIZ]; 555 int family, type, protocol, error; 556 557 /* Check if we're already connected */ 558 if (priv->hook != NULL) 559 return (EISCONN); 560 561 if (priv->flags & KSF_CLONED) { 562 if (priv->flags & KSF_EMBRYONIC) { 563 /* Remove ourselves from our parent's embryo list */ 564 LIST_REMOVE(priv, siblings); 565 priv->flags &= ~KSF_EMBRYONIC; 566 } 567 } else { 568 /* Extract family, type, and protocol from hook name */ 569 snprintf(name, sizeof(name), "%s", name0); 570 s1 = name; 571 if ((s2 = strchr(s1, '/')) == NULL) 572 return (EINVAL); 573 *s2++ = '\0'; 574 family = ng_ksocket_parse(ng_ksocket_families, s1, 0); 575 if (family == -1) 576 return (EINVAL); 577 s1 = s2; 578 if ((s2 = strchr(s1, '/')) == NULL) 579 return (EINVAL); 580 *s2++ = '\0'; 581 type = ng_ksocket_parse(ng_ksocket_types, s1, 0); 582 if (type == -1) 583 return (EINVAL); 584 s1 = s2; 585 protocol = ng_ksocket_parse(ng_ksocket_protos, s1, family); 586 if (protocol == -1) 587 return (EINVAL); 588 589 /* Create the socket */ 590 error = socreate(family, &priv->so, type, protocol, 591 td->td_ucred, td); 592 if (error != 0) 593 return (error); 594 595 /* XXX call soreserve() ? */ 596 597 } 598 599 /* OK */ 600 priv->hook = hook; 601 602 /* 603 * In case of misconfigured routing a packet may reenter 604 * ksocket node recursively. Decouple stack to avoid possible 605 * panics about sleeping with locks held. 606 */ 607 NG_HOOK_FORCE_QUEUE(hook); 608 609 return(0); 610} 611 612static int 613ng_ksocket_connect(hook_p hook) 614{ 615 node_p node = NG_HOOK_NODE(hook); 616 const priv_p priv = NG_NODE_PRIVATE(node); 617 struct socket *const so = priv->so; 618 619 /* Add our hook for incoming data and other events */ 620 SOCKBUF_LOCK(&priv->so->so_rcv); 621 soupcall_set(priv->so, SO_RCV, ng_ksocket_incoming, node); 622 SOCKBUF_UNLOCK(&priv->so->so_rcv); 623 SOCKBUF_LOCK(&priv->so->so_snd); 624 soupcall_set(priv->so, SO_SND, ng_ksocket_incoming, node); 625 SOCKBUF_UNLOCK(&priv->so->so_snd); 626 SOCK_LOCK(priv->so); 627 priv->so->so_state |= SS_NBIO; 628 SOCK_UNLOCK(priv->so); 629 /* 630 * --Original comment-- 631 * On a cloned socket we may have already received one or more 632 * upcalls which we couldn't handle without a hook. Handle 633 * those now. 634 * We cannot call the upcall function directly 635 * from here, because until this function has returned our 636 * hook isn't connected. 637 * 638 * ---meta comment for -current --- 639 * XXX This is dubius. 640 * Upcalls between the time that the hook was 641 * first created and now (on another processesor) will 642 * be earlier on the queue than the request to finalise the hook. 643 * By the time the hook is finalised, 644 * The queued upcalls will have happenned and the code 645 * will have discarded them because of a lack of a hook. 646 * (socket not open). 647 * 648 * This is a bad byproduct of the complicated way in which hooks 649 * are now created (3 daisy chained async events). 650 * 651 * Since we are a netgraph operation 652 * We know that we hold a lock on this node. This forces the 653 * request we make below to be queued rather than implemented 654 * immediatly which will cause the upcall function to be called a bit 655 * later. 656 * However, as we will run any waiting queued operations immediatly 657 * after doing this one, if we have not finalised the other end 658 * of the hook, those queued operations will fail. 659 */ 660 if (priv->flags & KSF_CLONED) { 661 ng_send_fn(node, NULL, &ng_ksocket_incoming2, so, M_NOWAIT); 662 } 663 664 return (0); 665} 666 667/* 668 * Receive a control message 669 */ 670static int 671ng_ksocket_rcvmsg(node_p node, item_p item, hook_p lasthook) 672{ 673 struct thread *td = curthread; /* XXX broken */ 674 const priv_p priv = NG_NODE_PRIVATE(node); 675 struct socket *const so = priv->so; 676 struct ng_mesg *resp = NULL; 677 int error = 0; 678 struct ng_mesg *msg; 679 ng_ID_t raddr; 680 681 NGI_GET_MSG(item, msg); 682 switch (msg->header.typecookie) { 683 case NGM_KSOCKET_COOKIE: 684 switch (msg->header.cmd) { 685 case NGM_KSOCKET_BIND: 686 { 687 struct sockaddr *const sa 688 = (struct sockaddr *)msg->data; 689 690 /* Sanity check */ 691 if (msg->header.arglen < SADATA_OFFSET 692 || msg->header.arglen < sa->sa_len) 693 ERROUT(EINVAL); 694 if (so == NULL) 695 ERROUT(ENXIO); 696 697 /* Bind */ 698 error = sobind(so, sa, td); 699 break; 700 } 701 case NGM_KSOCKET_LISTEN: 702 { 703 /* Sanity check */ 704 if (msg->header.arglen != sizeof(int32_t)) 705 ERROUT(EINVAL); 706 if (so == NULL) 707 ERROUT(ENXIO); 708 709 /* Listen */ 710 error = solisten(so, *((int32_t *)msg->data), td); 711 break; 712 } 713 714 case NGM_KSOCKET_ACCEPT: 715 { 716 /* Sanity check */ 717 if (msg->header.arglen != 0) 718 ERROUT(EINVAL); 719 if (so == NULL) 720 ERROUT(ENXIO); 721 722 /* Make sure the socket is capable of accepting */ 723 if (!(so->so_options & SO_ACCEPTCONN)) 724 ERROUT(EINVAL); 725 if (priv->flags & KSF_ACCEPTING) 726 ERROUT(EALREADY); 727 728 error = ng_ksocket_check_accept(priv); 729 if (error != 0 && error != EWOULDBLOCK) 730 ERROUT(error); 731 732 /* 733 * If a connection is already complete, take it. 734 * Otherwise let the upcall function deal with 735 * the connection when it comes in. 736 */ 737 priv->response_token = msg->header.token; 738 raddr = priv->response_addr = NGI_RETADDR(item); 739 if (error == 0) { 740 ng_ksocket_finish_accept(priv); 741 } else 742 priv->flags |= KSF_ACCEPTING; 743 break; 744 } 745 746 case NGM_KSOCKET_CONNECT: 747 { 748 struct sockaddr *const sa 749 = (struct sockaddr *)msg->data; 750 751 /* Sanity check */ 752 if (msg->header.arglen < SADATA_OFFSET 753 || msg->header.arglen < sa->sa_len) 754 ERROUT(EINVAL); 755 if (so == NULL) 756 ERROUT(ENXIO); 757 758 /* Do connect */ 759 if ((so->so_state & SS_ISCONNECTING) != 0) 760 ERROUT(EALREADY); 761 if ((error = soconnect(so, sa, td)) != 0) { 762 so->so_state &= ~SS_ISCONNECTING; 763 ERROUT(error); 764 } 765 if ((so->so_state & SS_ISCONNECTING) != 0) { 766 /* We will notify the sender when we connect */ 767 priv->response_token = msg->header.token; 768 raddr = priv->response_addr = NGI_RETADDR(item); 769 priv->flags |= KSF_CONNECTING; 770 ERROUT(EINPROGRESS); 771 } 772 break; 773 } 774 775 case NGM_KSOCKET_GETNAME: 776 case NGM_KSOCKET_GETPEERNAME: 777 { 778 int (*func)(struct socket *so, struct sockaddr **nam); 779 struct sockaddr *sa = NULL; 780 int len; 781 782 /* Sanity check */ 783 if (msg->header.arglen != 0) 784 ERROUT(EINVAL); 785 if (so == NULL) 786 ERROUT(ENXIO); 787 788 /* Get function */ 789 if (msg->header.cmd == NGM_KSOCKET_GETPEERNAME) { 790 if ((so->so_state 791 & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) 792 ERROUT(ENOTCONN); 793 func = so->so_proto->pr_usrreqs->pru_peeraddr; 794 } else 795 func = so->so_proto->pr_usrreqs->pru_sockaddr; 796 797 /* Get local or peer address */ 798 if ((error = (*func)(so, &sa)) != 0) 799 goto bail; 800 len = (sa == NULL) ? 0 : sa->sa_len; 801 802 /* Send it back in a response */ 803 NG_MKRESPONSE(resp, msg, len, M_NOWAIT); 804 if (resp == NULL) { 805 error = ENOMEM; 806 goto bail; 807 } 808 bcopy(sa, resp->data, len); 809 810 bail: 811 /* Cleanup */ 812 if (sa != NULL) 813 free(sa, M_SONAME); 814 break; 815 } 816 817 case NGM_KSOCKET_GETOPT: 818 { 819 struct ng_ksocket_sockopt *ksopt = 820 (struct ng_ksocket_sockopt *)msg->data; 821 struct sockopt sopt; 822 823 /* Sanity check */ 824 if (msg->header.arglen != sizeof(*ksopt)) 825 ERROUT(EINVAL); 826 if (so == NULL) 827 ERROUT(ENXIO); 828 829 /* Get response with room for option value */ 830 NG_MKRESPONSE(resp, msg, sizeof(*ksopt) 831 + NG_KSOCKET_MAX_OPTLEN, M_NOWAIT); 832 if (resp == NULL) 833 ERROUT(ENOMEM); 834 835 /* Get socket option, and put value in the response */ 836 sopt.sopt_dir = SOPT_GET; 837 sopt.sopt_level = ksopt->level; 838 sopt.sopt_name = ksopt->name; 839 sopt.sopt_td = NULL; 840 sopt.sopt_valsize = NG_KSOCKET_MAX_OPTLEN; 841 ksopt = (struct ng_ksocket_sockopt *)resp->data; 842 sopt.sopt_val = ksopt->value; 843 if ((error = sogetopt(so, &sopt)) != 0) { 844 NG_FREE_MSG(resp); 845 break; 846 } 847 848 /* Set actual value length */ 849 resp->header.arglen = sizeof(*ksopt) 850 + sopt.sopt_valsize; 851 break; 852 } 853 854 case NGM_KSOCKET_SETOPT: 855 { 856 struct ng_ksocket_sockopt *const ksopt = 857 (struct ng_ksocket_sockopt *)msg->data; 858 const int valsize = msg->header.arglen - sizeof(*ksopt); 859 struct sockopt sopt; 860 861 /* Sanity check */ 862 if (valsize < 0) 863 ERROUT(EINVAL); 864 if (so == NULL) 865 ERROUT(ENXIO); 866 867 /* Set socket option */ 868 sopt.sopt_dir = SOPT_SET; 869 sopt.sopt_level = ksopt->level; 870 sopt.sopt_name = ksopt->name; 871 sopt.sopt_val = ksopt->value; 872 sopt.sopt_valsize = valsize; 873 sopt.sopt_td = NULL; 874 error = sosetopt(so, &sopt); 875 break; 876 } 877 878 default: 879 error = EINVAL; 880 break; 881 } 882 break; 883 default: 884 error = EINVAL; 885 break; 886 } 887done: 888 NG_RESPOND_MSG(error, node, item, resp); 889 NG_FREE_MSG(msg); 890 return (error); 891} 892 893/* 894 * Receive incoming data on our hook. Send it out the socket. 895 */ 896static int 897ng_ksocket_rcvdata(hook_p hook, item_p item) 898{ 899 struct thread *td = curthread; /* XXX broken */ 900 const node_p node = NG_HOOK_NODE(hook); 901 const priv_p priv = NG_NODE_PRIVATE(node); 902 struct socket *const so = priv->so; 903 struct sockaddr *sa = NULL; 904 int error; 905 struct mbuf *m; 906#ifdef ALIGNED_POINTER 907 struct mbuf *n; 908#endif /* ALIGNED_POINTER */ 909 struct sa_tag *stag; 910 911 /* Extract data */ 912 NGI_GET_M(item, m); 913 NG_FREE_ITEM(item); 914#ifdef ALIGNED_POINTER 915 if (!ALIGNED_POINTER(mtod(m, caddr_t), uint32_t)) { 916 n = m_defrag(m, M_NOWAIT); 917 if (n == NULL) { 918 m_freem(m); 919 return (ENOBUFS); 920 } 921 m = n; 922 } 923#endif /* ALIGNED_POINTER */ 924 /* 925 * Look if socket address is stored in packet tags. 926 * If sockaddr is ours, or provided by a third party (zero id), 927 * then we accept it. 928 */ 929 if (((stag = (struct sa_tag *)m_tag_locate(m, NGM_KSOCKET_COOKIE, 930 NG_KSOCKET_TAG_SOCKADDR, NULL)) != NULL) && 931 (stag->id == NG_NODE_ID(node) || stag->id == 0)) 932 sa = &stag->sa; 933 934 /* Reset specific mbuf flags to prevent addressing problems. */ 935 m->m_flags &= ~(M_BCAST|M_MCAST); 936 937 /* Send packet */ 938 error = sosend(so, sa, 0, m, 0, 0, td); 939 940 return (error); 941} 942 943/* 944 * Destroy node 945 */ 946static int 947ng_ksocket_shutdown(node_p node) 948{ 949 const priv_p priv = NG_NODE_PRIVATE(node); 950 priv_p embryo; 951 952 /* Close our socket (if any) */ 953 if (priv->so != NULL) { 954 SOCKBUF_LOCK(&priv->so->so_rcv); 955 soupcall_clear(priv->so, SO_RCV); 956 SOCKBUF_UNLOCK(&priv->so->so_rcv); 957 SOCKBUF_LOCK(&priv->so->so_snd); 958 soupcall_clear(priv->so, SO_SND); 959 SOCKBUF_UNLOCK(&priv->so->so_snd); 960 soclose(priv->so); 961 priv->so = NULL; 962 } 963 964 /* If we are an embryo, take ourselves out of the parent's list */ 965 if (priv->flags & KSF_EMBRYONIC) { 966 LIST_REMOVE(priv, siblings); 967 priv->flags &= ~KSF_EMBRYONIC; 968 } 969 970 /* Remove any embryonic children we have */ 971 while (!LIST_EMPTY(&priv->embryos)) { 972 embryo = LIST_FIRST(&priv->embryos); 973 ng_rmnode_self(embryo->node); 974 } 975 976 /* Take down netgraph node */ 977 bzero(priv, sizeof(*priv)); 978 free(priv, M_NETGRAPH_KSOCKET); 979 NG_NODE_SET_PRIVATE(node, NULL); 980 NG_NODE_UNREF(node); /* let the node escape */ 981 return (0); 982} 983 984/* 985 * Hook disconnection 986 */ 987static int 988ng_ksocket_disconnect(hook_p hook) 989{ 990 KASSERT(NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0, 991 ("%s: numhooks=%d?", __func__, 992 NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)))); 993 if (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))) 994 ng_rmnode_self(NG_HOOK_NODE(hook)); 995 return (0); 996} 997 998/************************************************************************ 999 HELPER STUFF 1000 ************************************************************************/ 1001/* 1002 * You should not "just call" a netgraph node function from an external 1003 * asynchronous event. This is because in doing so you are ignoring the 1004 * locking on the netgraph nodes. Instead call your function via ng_send_fn(). 1005 * This will call the function you chose, but will first do all the 1006 * locking rigmarole. Your function MAY only be called at some distant future 1007 * time (several millisecs away) so don't give it any arguments 1008 * that may be revoked soon (e.g. on your stack). 1009 * 1010 * To decouple stack, we use queue version of ng_send_fn(). 1011 */ 1012 1013static int 1014ng_ksocket_incoming(struct socket *so, void *arg, int waitflag) 1015{ 1016 const node_p node = arg; 1017 const priv_p priv = NG_NODE_PRIVATE(node); 1018 int wait = ((waitflag & M_WAITOK) ? NG_WAITOK : 0) | NG_QUEUE; 1019 1020 /* 1021 * Even if node is not locked, as soon as we are called, we assume 1022 * it exist and it's private area is valid. With some care we can 1023 * access it. Mark node that incoming event for it was sent to 1024 * avoid unneded queue trashing. 1025 */ 1026 if (atomic_cmpset_int(&priv->fn_sent, 0, 1) && 1027 ng_send_fn1(node, NULL, &ng_ksocket_incoming2, so, 0, wait)) { 1028 atomic_store_rel_int(&priv->fn_sent, 0); 1029 } 1030 return (SU_OK); 1031} 1032 1033 1034/* 1035 * When incoming data is appended to the socket, we get notified here. 1036 * This is also called whenever a significant event occurs for the socket. 1037 * Our original caller may have queued this even some time ago and 1038 * we cannot trust that he even still exists. The node however is being 1039 * held with a reference by the queueing code and guarantied to be valid. 1040 */ 1041static void 1042ng_ksocket_incoming2(node_p node, hook_p hook, void *arg1, int arg2) 1043{ 1044 struct socket *so = arg1; 1045 const priv_p priv = NG_NODE_PRIVATE(node); 1046 struct ng_mesg *response; 1047 int error; 1048 1049 KASSERT(so == priv->so, ("%s: wrong socket", __func__)); 1050 1051 /* Allow next incoming event to be queued. */ 1052 atomic_store_rel_int(&priv->fn_sent, 0); 1053 1054 /* Check whether a pending connect operation has completed */ 1055 if (priv->flags & KSF_CONNECTING) { 1056 if ((error = so->so_error) != 0) { 1057 so->so_error = 0; 1058 so->so_state &= ~SS_ISCONNECTING; 1059 } 1060 if (!(so->so_state & SS_ISCONNECTING)) { 1061 NG_MKMESSAGE(response, NGM_KSOCKET_COOKIE, 1062 NGM_KSOCKET_CONNECT, sizeof(int32_t), M_NOWAIT); 1063 if (response != NULL) { 1064 response->header.flags |= NGF_RESP; 1065 response->header.token = priv->response_token; 1066 *(int32_t *)response->data = error; 1067 /* 1068 * send an async "response" message 1069 * to the node that set us up 1070 * (if it still exists) 1071 */ 1072 NG_SEND_MSG_ID(error, node, 1073 response, priv->response_addr, 0); 1074 } 1075 priv->flags &= ~KSF_CONNECTING; 1076 } 1077 } 1078 1079 /* Check whether a pending accept operation has completed */ 1080 if (priv->flags & KSF_ACCEPTING) { 1081 error = ng_ksocket_check_accept(priv); 1082 if (error != EWOULDBLOCK) 1083 priv->flags &= ~KSF_ACCEPTING; 1084 if (error == 0) 1085 ng_ksocket_finish_accept(priv); 1086 } 1087 1088 /* 1089 * If we don't have a hook, we must handle data events later. When 1090 * the hook gets created and is connected, this upcall function 1091 * will be called again. 1092 */ 1093 if (priv->hook == NULL) 1094 return; 1095 1096 /* Read and forward available mbufs. */ 1097 while (1) { 1098 struct uio uio; 1099 struct sockaddr *sa; 1100 struct mbuf *m; 1101 int flags; 1102 1103 /* Try to get next packet from socket. */ 1104 uio.uio_td = NULL; 1105 uio.uio_resid = IP_MAXPACKET; 1106 flags = MSG_DONTWAIT; 1107 sa = NULL; 1108 if ((error = soreceive(so, (so->so_state & SS_ISCONNECTED) ? 1109 NULL : &sa, &uio, &m, NULL, &flags)) != 0) 1110 break; 1111 1112 /* See if we got anything. */ 1113 if (flags & MSG_TRUNC) { 1114 m_freem(m); 1115 m = NULL; 1116 } 1117 if (m == NULL) { 1118 if (sa != NULL) 1119 free(sa, M_SONAME); 1120 break; 1121 } 1122 1123 KASSERT(m->m_nextpkt == NULL, ("%s: nextpkt", __func__)); 1124 1125 /* 1126 * Stream sockets do not have packet boundaries, so 1127 * we have to allocate a header mbuf and attach the 1128 * stream of data to it. 1129 */ 1130 if (so->so_type == SOCK_STREAM) { 1131 struct mbuf *mh; 1132 1133 mh = m_gethdr(M_NOWAIT, MT_DATA); 1134 if (mh == NULL) { 1135 m_freem(m); 1136 if (sa != NULL) 1137 free(sa, M_SONAME); 1138 break; 1139 } 1140 1141 mh->m_next = m; 1142 for (; m; m = m->m_next) 1143 mh->m_pkthdr.len += m->m_len; 1144 m = mh; 1145 } 1146 1147 /* Put peer's socket address (if any) into a tag */ 1148 if (sa != NULL) { 1149 struct sa_tag *stag; 1150 1151 stag = (struct sa_tag *)m_tag_alloc(NGM_KSOCKET_COOKIE, 1152 NG_KSOCKET_TAG_SOCKADDR, sizeof(ng_ID_t) + 1153 sa->sa_len, M_NOWAIT); 1154 if (stag == NULL) { 1155 free(sa, M_SONAME); 1156 goto sendit; 1157 } 1158 bcopy(sa, &stag->sa, sa->sa_len); 1159 free(sa, M_SONAME); 1160 stag->id = NG_NODE_ID(node); 1161 m_tag_prepend(m, &stag->tag); 1162 } 1163 1164sendit: /* Forward data with optional peer sockaddr as packet tag */ 1165 NG_SEND_DATA_ONLY(error, priv->hook, m); 1166 } 1167 1168 /* 1169 * If the peer has closed the connection, forward a 0-length mbuf 1170 * to indicate end-of-file. 1171 */ 1172 if (so->so_rcv.sb_state & SBS_CANTRCVMORE && 1173 !(priv->flags & KSF_EOFSEEN)) { 1174 struct mbuf *m; 1175 1176 m = m_gethdr(M_NOWAIT, MT_DATA); 1177 if (m != NULL) 1178 NG_SEND_DATA_ONLY(error, priv->hook, m); 1179 priv->flags |= KSF_EOFSEEN; 1180 } 1181} 1182 1183/* 1184 * Check for a completed incoming connection and return 0 if one is found. 1185 * Otherwise return the appropriate error code. 1186 */ 1187static int 1188ng_ksocket_check_accept(priv_p priv) 1189{ 1190 struct socket *const head = priv->so; 1191 int error; 1192 1193 if ((error = head->so_error) != 0) { 1194 head->so_error = 0; 1195 return error; 1196 } 1197 /* Unlocked read. */ 1198 if (TAILQ_EMPTY(&head->so_comp)) { 1199 if (head->so_rcv.sb_state & SBS_CANTRCVMORE) 1200 return ECONNABORTED; 1201 return EWOULDBLOCK; 1202 } 1203 return 0; 1204} 1205 1206/* 1207 * Handle the first completed incoming connection, assumed to be already 1208 * on the socket's so_comp queue. 1209 */ 1210static void 1211ng_ksocket_finish_accept(priv_p priv) 1212{ 1213 struct socket *const head = priv->so; 1214 struct socket *so; 1215 struct sockaddr *sa = NULL; 1216 struct ng_mesg *resp; 1217 struct ng_ksocket_accept *resp_data; 1218 node_p node; 1219 priv_p priv2; 1220 int len; 1221 int error; 1222 1223 ACCEPT_LOCK(); 1224 so = TAILQ_FIRST(&head->so_comp); 1225 if (so == NULL) { /* Should never happen */ 1226 ACCEPT_UNLOCK(); 1227 return; 1228 } 1229 TAILQ_REMOVE(&head->so_comp, so, so_list); 1230 head->so_qlen--; 1231 so->so_qstate &= ~SQ_COMP; 1232 so->so_head = NULL; 1233 SOCK_LOCK(so); 1234 soref(so); 1235 so->so_state |= SS_NBIO; 1236 SOCK_UNLOCK(so); 1237 ACCEPT_UNLOCK(); 1238 1239 /* XXX KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0); */ 1240 1241 soaccept(so, &sa); 1242 1243 len = OFFSETOF(struct ng_ksocket_accept, addr); 1244 if (sa != NULL) 1245 len += sa->sa_len; 1246 1247 NG_MKMESSAGE(resp, NGM_KSOCKET_COOKIE, NGM_KSOCKET_ACCEPT, len, 1248 M_NOWAIT); 1249 if (resp == NULL) { 1250 soclose(so); 1251 goto out; 1252 } 1253 resp->header.flags |= NGF_RESP; 1254 resp->header.token = priv->response_token; 1255 1256 /* Clone a ksocket node to wrap the new socket */ 1257 error = ng_make_node_common(&ng_ksocket_typestruct, &node); 1258 if (error) { 1259 free(resp, M_NETGRAPH); 1260 soclose(so); 1261 goto out; 1262 } 1263 1264 if (ng_ksocket_constructor(node) != 0) { 1265 NG_NODE_UNREF(node); 1266 free(resp, M_NETGRAPH); 1267 soclose(so); 1268 goto out; 1269 } 1270 1271 priv2 = NG_NODE_PRIVATE(node); 1272 priv2->so = so; 1273 priv2->flags |= KSF_CLONED | KSF_EMBRYONIC; 1274 1275 /* 1276 * Insert the cloned node into a list of embryonic children 1277 * on the parent node. When a hook is created on the cloned 1278 * node it will be removed from this list. When the parent 1279 * is destroyed it will destroy any embryonic children it has. 1280 */ 1281 LIST_INSERT_HEAD(&priv->embryos, priv2, siblings); 1282 1283 SOCKBUF_LOCK(&so->so_rcv); 1284 soupcall_set(so, SO_RCV, ng_ksocket_incoming, node); 1285 SOCKBUF_UNLOCK(&so->so_rcv); 1286 SOCKBUF_LOCK(&so->so_snd); 1287 soupcall_set(so, SO_SND, ng_ksocket_incoming, node); 1288 SOCKBUF_UNLOCK(&so->so_snd); 1289 1290 /* Fill in the response data and send it or return it to the caller */ 1291 resp_data = (struct ng_ksocket_accept *)resp->data; 1292 resp_data->nodeid = NG_NODE_ID(node); 1293 if (sa != NULL) 1294 bcopy(sa, &resp_data->addr, sa->sa_len); 1295 NG_SEND_MSG_ID(error, node, resp, priv->response_addr, 0); 1296 1297out: 1298 if (sa != NULL) 1299 free(sa, M_SONAME); 1300} 1301 1302/* 1303 * Parse out either an integer value or an alias. 1304 */ 1305static int 1306ng_ksocket_parse(const struct ng_ksocket_alias *aliases, 1307 const char *s, int family) 1308{ 1309 int k, val; 1310 char *eptr; 1311 1312 /* Try aliases */ 1313 for (k = 0; aliases[k].name != NULL; k++) { 1314 if (strcmp(s, aliases[k].name) == 0 1315 && aliases[k].family == family) 1316 return aliases[k].value; 1317 } 1318 1319 /* Try parsing as a number */ 1320 val = (int)strtoul(s, &eptr, 10); 1321 if (val < 0 || *eptr != '\0') 1322 return (-1); 1323 return (val); 1324} 1325 1326