Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/netgraph/ng_ksocket.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
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/10.0/sys/netgraph/ng_ksocket.c 259757 2013-12-23 01:15:55Z 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 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 { "atalk", PF_APPLETALK }, 124 { "ipx", PF_IPX }, 125 { "atm", PF_ATM }, 126 { NULL, -1 }, 127 }; 128 129 /* Socket type aliases */ 130 static const struct ng_ksocket_alias ng_ksocket_types[] = { 131 { "stream", SOCK_STREAM }, 132 { "dgram", SOCK_DGRAM }, 133 { "raw", SOCK_RAW }, 134 { "rdm", SOCK_RDM }, 135 { "seqpacket", SOCK_SEQPACKET }, 136 { NULL, -1 }, 137 }; 138 139 /* Protocol aliases */ 140 static const struct ng_ksocket_alias ng_ksocket_protos[] = { 141 { "ip", IPPROTO_IP, PF_INET }, 142 { "raw", IPPROTO_RAW, PF_INET }, 143 { "icmp", IPPROTO_ICMP, PF_INET }, 144 { "igmp", IPPROTO_IGMP, PF_INET }, 145 { "tcp", IPPROTO_TCP, PF_INET }, 146 { "udp", IPPROTO_UDP, PF_INET }, 147 { "gre", IPPROTO_GRE, PF_INET }, 148 { "esp", IPPROTO_ESP, PF_INET }, 149 { "ah", IPPROTO_AH, PF_INET }, 150 { "swipe", IPPROTO_SWIPE, PF_INET }, 151 { "encap", IPPROTO_ENCAP, PF_INET }, 152 { "divert", IPPROTO_DIVERT, PF_INET }, 153 { "pim", IPPROTO_PIM, PF_INET }, 154 { "ddp", ATPROTO_DDP, PF_APPLETALK }, 155 { "aarp", ATPROTO_AARP, PF_APPLETALK }, 156 { NULL, -1 }, 157 }; 158 159 /* Helper functions */ 160 static int ng_ksocket_check_accept(priv_p); 161 static void ng_ksocket_finish_accept(priv_p); 162 static int ng_ksocket_incoming(struct socket *so, void *arg, int waitflag); 163 static int ng_ksocket_parse(const struct ng_ksocket_alias *aliases, 164 const char *s, int family); 165 static void ng_ksocket_incoming2(node_p node, hook_p hook, 166 void *arg1, int arg2); 167 168 /************************************************************************ 169 STRUCT SOCKADDR PARSE TYPE 170 ************************************************************************/ 171 172 /* Get the length of the data portion of a generic struct sockaddr */ 173 static int 174 ng_parse_generic_sockdata_getLength(const struct ng_parse_type *type, 175 const u_char *start, const u_char *buf) 176 { 177 const struct sockaddr *sa; 178 179 sa = (const struct sockaddr *)(buf - SADATA_OFFSET); 180 return (sa->sa_len < SADATA_OFFSET) ? 0 : sa->sa_len - SADATA_OFFSET; 181 } 182 183 /* Type for the variable length data portion of a generic struct sockaddr */ 184 static const struct ng_parse_type ng_ksocket_generic_sockdata_type = { 185 &ng_parse_bytearray_type, 186 &ng_parse_generic_sockdata_getLength 187 }; 188 189 /* Type for a generic struct sockaddr */ 190 static const struct ng_parse_struct_field 191 ng_parse_generic_sockaddr_type_fields[] = { 192 { "len", &ng_parse_uint8_type }, 193 { "family", &ng_parse_uint8_type }, 194 { "data", &ng_ksocket_generic_sockdata_type }, 195 { NULL } 196 }; 197 static const struct ng_parse_type ng_ksocket_generic_sockaddr_type = { 198 &ng_parse_struct_type, 199 &ng_parse_generic_sockaddr_type_fields 200 }; 201 202 /* Convert a struct sockaddr from ASCII to binary. If its a protocol 203 family that we specially handle, do that, otherwise defer to the 204 generic parse type ng_ksocket_generic_sockaddr_type. */ 205 static int 206 ng_ksocket_sockaddr_parse(const struct ng_parse_type *type, 207 const char *s, int *off, const u_char *const start, 208 u_char *const buf, int *buflen) 209 { 210 struct sockaddr *const sa = (struct sockaddr *)buf; 211 enum ng_parse_token tok; 212 char fambuf[32]; 213 int family, len; 214 char *t; 215 216 /* If next token is a left curly brace, use generic parse type */ 217 if ((tok = ng_parse_get_token(s, off, &len)) == T_LBRACE) { 218 return (*ng_ksocket_generic_sockaddr_type.supertype->parse) 219 (&ng_ksocket_generic_sockaddr_type, 220 s, off, start, buf, buflen); 221 } 222 223 /* Get socket address family followed by a slash */ 224 while (isspace(s[*off])) 225 (*off)++; 226 if ((t = strchr(s + *off, '/')) == NULL) 227 return (EINVAL); 228 if ((len = t - (s + *off)) > sizeof(fambuf) - 1) 229 return (EINVAL); 230 strncpy(fambuf, s + *off, len); 231 fambuf[len] = '\0'; 232 *off += len + 1; 233 if ((family = ng_ksocket_parse(ng_ksocket_families, fambuf, 0)) == -1) 234 return (EINVAL); 235 236 /* Set family */ 237 if (*buflen < SADATA_OFFSET) 238 return (ERANGE); 239 sa->sa_family = family; 240 241 /* Set family-specific data and length */ 242 switch (sa->sa_family) { 243 case PF_LOCAL: /* Get pathname */ 244 { 245 const int pathoff = OFFSETOF(struct sockaddr_un, sun_path); 246 struct sockaddr_un *const sun = (struct sockaddr_un *)sa; 247 int toklen, pathlen; 248 char *path; 249 250 if ((path = ng_get_string_token(s, off, &toklen, NULL)) == NULL) 251 return (EINVAL); 252 pathlen = strlen(path); 253 if (pathlen > SOCK_MAXADDRLEN) { 254 free(path, M_NETGRAPH_KSOCKET); 255 return (E2BIG); 256 } 257 if (*buflen < pathoff + pathlen) { 258 free(path, M_NETGRAPH_KSOCKET); 259 return (ERANGE); 260 } 261 *off += toklen; 262 bcopy(path, sun->sun_path, pathlen); 263 sun->sun_len = pathoff + pathlen; 264 free(path, M_NETGRAPH_KSOCKET); 265 break; 266 } 267 268 case PF_INET: /* Get an IP address with optional port */ 269 { 270 struct sockaddr_in *const sin = (struct sockaddr_in *)sa; 271 int i; 272 273 /* Parse this: <ipaddress>[:port] */ 274 for (i = 0; i < 4; i++) { 275 u_long val; 276 char *eptr; 277 278 val = strtoul(s + *off, &eptr, 10); 279 if (val > 0xff || eptr == s + *off) 280 return (EINVAL); 281 *off += (eptr - (s + *off)); 282 ((u_char *)&sin->sin_addr)[i] = (u_char)val; 283 if (i < 3) { 284 if (s[*off] != '.') 285 return (EINVAL); 286 (*off)++; 287 } else if (s[*off] == ':') { 288 (*off)++; 289 val = strtoul(s + *off, &eptr, 10); 290 if (val > 0xffff || eptr == s + *off) 291 return (EINVAL); 292 *off += (eptr - (s + *off)); 293 sin->sin_port = htons(val); 294 } else 295 sin->sin_port = 0; 296 } 297 bzero(&sin->sin_zero, sizeof(sin->sin_zero)); 298 sin->sin_len = sizeof(*sin); 299 break; 300 } 301 302 #if 0 303 case PF_APPLETALK: /* XXX implement these someday */ 304 case PF_INET6: 305 case PF_IPX: 306 #endif 307 308 default: 309 return (EINVAL); 310 } 311 312 /* Done */ 313 *buflen = sa->sa_len; 314 return (0); 315 } 316 317 /* Convert a struct sockaddr from binary to ASCII */ 318 static int 319 ng_ksocket_sockaddr_unparse(const struct ng_parse_type *type, 320 const u_char *data, int *off, char *cbuf, int cbuflen) 321 { 322 const struct sockaddr *sa = (const struct sockaddr *)(data + *off); 323 int slen = 0; 324 325 /* Output socket address, either in special or generic format */ 326 switch (sa->sa_family) { 327 case PF_LOCAL: 328 { 329 const int pathoff = OFFSETOF(struct sockaddr_un, sun_path); 330 const struct sockaddr_un *sun = (const struct sockaddr_un *)sa; 331 const int pathlen = sun->sun_len - pathoff; 332 char pathbuf[SOCK_MAXADDRLEN + 1]; 333 char *pathtoken; 334 335 bcopy(sun->sun_path, pathbuf, pathlen); 336 if ((pathtoken = ng_encode_string(pathbuf, pathlen)) == NULL) 337 return (ENOMEM); 338 slen += snprintf(cbuf, cbuflen, "local/%s", pathtoken); 339 free(pathtoken, M_NETGRAPH_KSOCKET); 340 if (slen >= cbuflen) 341 return (ERANGE); 342 *off += sun->sun_len; 343 return (0); 344 } 345 346 case PF_INET: 347 { 348 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; 349 350 slen += snprintf(cbuf, cbuflen, "inet/%d.%d.%d.%d", 351 ((const u_char *)&sin->sin_addr)[0], 352 ((const u_char *)&sin->sin_addr)[1], 353 ((const u_char *)&sin->sin_addr)[2], 354 ((const u_char *)&sin->sin_addr)[3]); 355 if (sin->sin_port != 0) { 356 slen += snprintf(cbuf + strlen(cbuf), 357 cbuflen - strlen(cbuf), ":%d", 358 (u_int)ntohs(sin->sin_port)); 359 } 360 if (slen >= cbuflen) 361 return (ERANGE); 362 *off += sizeof(*sin); 363 return(0); 364 } 365 366 #if 0 367 case PF_APPLETALK: /* XXX implement these someday */ 368 case PF_INET6: 369 case PF_IPX: 370 #endif 371 372 default: 373 return (*ng_ksocket_generic_sockaddr_type.supertype->unparse) 374 (&ng_ksocket_generic_sockaddr_type, 375 data, off, cbuf, cbuflen); 376 } 377 } 378 379 /* Parse type for struct sockaddr */ 380 static const struct ng_parse_type ng_ksocket_sockaddr_type = { 381 NULL, 382 NULL, 383 NULL, 384 &ng_ksocket_sockaddr_parse, 385 &ng_ksocket_sockaddr_unparse, 386 NULL /* no such thing as a default struct sockaddr */ 387 }; 388 389 /************************************************************************ 390 STRUCT NG_KSOCKET_SOCKOPT PARSE TYPE 391 ************************************************************************/ 392 393 /* Get length of the struct ng_ksocket_sockopt value field, which is the 394 just the excess of the message argument portion over the length of 395 the struct ng_ksocket_sockopt. */ 396 static int 397 ng_parse_sockoptval_getLength(const struct ng_parse_type *type, 398 const u_char *start, const u_char *buf) 399 { 400 static const int offset = OFFSETOF(struct ng_ksocket_sockopt, value); 401 const struct ng_ksocket_sockopt *sopt; 402 const struct ng_mesg *msg; 403 404 sopt = (const struct ng_ksocket_sockopt *)(buf - offset); 405 msg = (const struct ng_mesg *)((const u_char *)sopt - sizeof(*msg)); 406 return msg->header.arglen - sizeof(*sopt); 407 } 408 409 /* Parse type for the option value part of a struct ng_ksocket_sockopt 410 XXX Eventually, we should handle the different socket options specially. 411 XXX This would avoid byte order problems, eg an integer value of 1 is 412 XXX going to be "[1]" for little endian or "[3=1]" for big endian. */ 413 static const struct ng_parse_type ng_ksocket_sockoptval_type = { 414 &ng_parse_bytearray_type, 415 &ng_parse_sockoptval_getLength 416 }; 417 418 /* Parse type for struct ng_ksocket_sockopt */ 419 static const struct ng_parse_struct_field ng_ksocket_sockopt_type_fields[] 420 = NG_KSOCKET_SOCKOPT_INFO(&ng_ksocket_sockoptval_type); 421 static const struct ng_parse_type ng_ksocket_sockopt_type = { 422 &ng_parse_struct_type, 423 &ng_ksocket_sockopt_type_fields 424 }; 425 426 /* Parse type for struct ng_ksocket_accept */ 427 static const struct ng_parse_struct_field ng_ksocket_accept_type_fields[] 428 = NGM_KSOCKET_ACCEPT_INFO; 429 static const struct ng_parse_type ng_ksocket_accept_type = { 430 &ng_parse_struct_type, 431 &ng_ksocket_accept_type_fields 432 }; 433 434 /* List of commands and how to convert arguments to/from ASCII */ 435 static const struct ng_cmdlist ng_ksocket_cmds[] = { 436 { 437 NGM_KSOCKET_COOKIE, 438 NGM_KSOCKET_BIND, 439 "bind", 440 &ng_ksocket_sockaddr_type, 441 NULL 442 }, 443 { 444 NGM_KSOCKET_COOKIE, 445 NGM_KSOCKET_LISTEN, 446 "listen", 447 &ng_parse_int32_type, 448 NULL 449 }, 450 { 451 NGM_KSOCKET_COOKIE, 452 NGM_KSOCKET_ACCEPT, 453 "accept", 454 NULL, 455 &ng_ksocket_accept_type 456 }, 457 { 458 NGM_KSOCKET_COOKIE, 459 NGM_KSOCKET_CONNECT, 460 "connect", 461 &ng_ksocket_sockaddr_type, 462 &ng_parse_int32_type 463 }, 464 { 465 NGM_KSOCKET_COOKIE, 466 NGM_KSOCKET_GETNAME, 467 "getname", 468 NULL, 469 &ng_ksocket_sockaddr_type 470 }, 471 { 472 NGM_KSOCKET_COOKIE, 473 NGM_KSOCKET_GETPEERNAME, 474 "getpeername", 475 NULL, 476 &ng_ksocket_sockaddr_type 477 }, 478 { 479 NGM_KSOCKET_COOKIE, 480 NGM_KSOCKET_SETOPT, 481 "setopt", 482 &ng_ksocket_sockopt_type, 483 NULL 484 }, 485 { 486 NGM_KSOCKET_COOKIE, 487 NGM_KSOCKET_GETOPT, 488 "getopt", 489 &ng_ksocket_sockopt_type, 490 &ng_ksocket_sockopt_type 491 }, 492 { 0 } 493 }; 494 495 /* Node type descriptor */ 496 static struct ng_type ng_ksocket_typestruct = { 497 .version = NG_ABI_VERSION, 498 .name = NG_KSOCKET_NODE_TYPE, 499 .constructor = ng_ksocket_constructor, 500 .rcvmsg = ng_ksocket_rcvmsg, 501 .shutdown = ng_ksocket_shutdown, 502 .newhook = ng_ksocket_newhook, 503 .connect = ng_ksocket_connect, 504 .rcvdata = ng_ksocket_rcvdata, 505 .disconnect = ng_ksocket_disconnect, 506 .cmdlist = ng_ksocket_cmds, 507 }; 508 NETGRAPH_INIT(ksocket, &ng_ksocket_typestruct); 509 510 #define ERROUT(x) do { error = (x); goto done; } while (0) 511 512 /************************************************************************ 513 NETGRAPH NODE STUFF 514 ************************************************************************/ 515 516 /* 517 * Node type constructor 518 * The NODE part is assumed to be all set up. 519 * There is already a reference to the node for us. 520 */ 521 static int 522 ng_ksocket_constructor(node_p node) 523 { 524 priv_p priv; 525 526 /* Allocate private structure */ 527 priv = malloc(sizeof(*priv), M_NETGRAPH_KSOCKET, M_NOWAIT | M_ZERO); 528 if (priv == NULL) 529 return (ENOMEM); 530 531 LIST_INIT(&priv->embryos); 532 /* cross link them */ 533 priv->node = node; 534 NG_NODE_SET_PRIVATE(node, priv); 535 536 /* Done */ 537 return (0); 538 } 539 540 /* 541 * Give our OK for a hook to be added. The hook name is of the 542 * form "<family>/<type>/<proto>" where the three components may 543 * be decimal numbers or else aliases from the above lists. 544 * 545 * Connecting a hook amounts to opening the socket. Disconnecting 546 * the hook closes the socket and destroys the node as well. 547 */ 548 static int 549 ng_ksocket_newhook(node_p node, hook_p hook, const char *name0) 550 { 551 struct thread *td = curthread; /* XXX broken */ 552 const priv_p priv = NG_NODE_PRIVATE(node); 553 char *s1, *s2, name[NG_HOOKSIZ]; 554 int family, type, protocol, error; 555 556 /* Check if we're already connected */ 557 if (priv->hook != NULL) 558 return (EISCONN); 559 560 if (priv->flags & KSF_CLONED) { 561 if (priv->flags & KSF_EMBRYONIC) { 562 /* Remove ourselves from our parent's embryo list */ 563 LIST_REMOVE(priv, siblings); 564 priv->flags &= ~KSF_EMBRYONIC; 565 } 566 } else { 567 /* Extract family, type, and protocol from hook name */ 568 snprintf(name, sizeof(name), "%s", name0); 569 s1 = name; 570 if ((s2 = strchr(s1, '/')) == NULL) 571 return (EINVAL); 572 *s2++ = '\0'; 573 family = ng_ksocket_parse(ng_ksocket_families, s1, 0); 574 if (family == -1) 575 return (EINVAL); 576 s1 = s2; 577 if ((s2 = strchr(s1, '/')) == NULL) 578 return (EINVAL); 579 *s2++ = '\0'; 580 type = ng_ksocket_parse(ng_ksocket_types, s1, 0); 581 if (type == -1) 582 return (EINVAL); 583 s1 = s2; 584 protocol = ng_ksocket_parse(ng_ksocket_protos, s1, family); 585 if (protocol == -1) 586 return (EINVAL); 587 588 /* Create the socket */ 589 error = socreate(family, &priv->so, type, protocol, 590 td->td_ucred, td); 591 if (error != 0) 592 return (error); 593 594 /* XXX call soreserve() ? */ 595 596 } 597 598 /* OK */ 599 priv->hook = hook; 600 601 /* 602 * In case of misconfigured routing a packet may reenter 603 * ksocket node recursively. Decouple stack to avoid possible 604 * panics about sleeping with locks held. 605 */ 606 NG_HOOK_FORCE_QUEUE(hook); 607 608 return(0); 609 } 610 611 static int 612 ng_ksocket_connect(hook_p hook) 613 { 614 node_p node = NG_HOOK_NODE(hook); 615 const priv_p priv = NG_NODE_PRIVATE(node); 616 struct socket *const so = priv->so; 617 618 /* Add our hook for incoming data and other events */ 619 SOCKBUF_LOCK(&priv->so->so_rcv); 620 soupcall_set(priv->so, SO_RCV, ng_ksocket_incoming, node); 621 SOCKBUF_UNLOCK(&priv->so->so_rcv); 622 SOCKBUF_LOCK(&priv->so->so_snd); 623 soupcall_set(priv->so, SO_SND, ng_ksocket_incoming, node); 624 SOCKBUF_UNLOCK(&priv->so->so_snd); 625 SOCK_LOCK(priv->so); 626 priv->so->so_state |= SS_NBIO; 627 SOCK_UNLOCK(priv->so); 628 /* 629 * --Original comment-- 630 * On a cloned socket we may have already received one or more 631 * upcalls which we couldn't handle without a hook. Handle 632 * those now. 633 * We cannot call the upcall function directly 634 * from here, because until this function has returned our 635 * hook isn't connected. 636 * 637 * ---meta comment for -current --- 638 * XXX This is dubius. 639 * Upcalls between the time that the hook was 640 * first created and now (on another processesor) will 641 * be earlier on the queue than the request to finalise the hook. 642 * By the time the hook is finalised, 643 * The queued upcalls will have happenned and the code 644 * will have discarded them because of a lack of a hook. 645 * (socket not open). 646 * 647 * This is a bad byproduct of the complicated way in which hooks 648 * are now created (3 daisy chained async events). 649 * 650 * Since we are a netgraph operation 651 * We know that we hold a lock on this node. This forces the 652 * request we make below to be queued rather than implemented 653 * immediatly which will cause the upcall function to be called a bit 654 * later. 655 * However, as we will run any waiting queued operations immediatly 656 * after doing this one, if we have not finalised the other end 657 * of the hook, those queued operations will fail. 658 */ 659 if (priv->flags & KSF_CLONED) { 660 ng_send_fn(node, NULL, &ng_ksocket_incoming2, so, M_NOWAIT); 661 } 662 663 return (0); 664 } 665 666 /* 667 * Receive a control message 668 */ 669 static int 670 ng_ksocket_rcvmsg(node_p node, item_p item, hook_p lasthook) 671 { 672 struct thread *td = curthread; /* XXX broken */ 673 const priv_p priv = NG_NODE_PRIVATE(node); 674 struct socket *const so = priv->so; 675 struct ng_mesg *resp = NULL; 676 int error = 0; 677 struct ng_mesg *msg; 678 ng_ID_t raddr; 679 680 NGI_GET_MSG(item, msg); 681 switch (msg->header.typecookie) { 682 case NGM_KSOCKET_COOKIE: 683 switch (msg->header.cmd) { 684 case NGM_KSOCKET_BIND: 685 { 686 struct sockaddr *const sa 687 = (struct sockaddr *)msg->data; 688 689 /* Sanity check */ 690 if (msg->header.arglen < SADATA_OFFSET 691 || msg->header.arglen < sa->sa_len) 692 ERROUT(EINVAL); 693 if (so == NULL) 694 ERROUT(ENXIO); 695 696 /* Bind */ 697 error = sobind(so, sa, td); 698 break; 699 } 700 case NGM_KSOCKET_LISTEN: 701 { 702 /* Sanity check */ 703 if (msg->header.arglen != sizeof(int32_t)) 704 ERROUT(EINVAL); 705 if (so == NULL) 706 ERROUT(ENXIO); 707 708 /* Listen */ 709 error = solisten(so, *((int32_t *)msg->data), td); 710 break; 711 } 712 713 case NGM_KSOCKET_ACCEPT: 714 { 715 /* Sanity check */ 716 if (msg->header.arglen != 0) 717 ERROUT(EINVAL); 718 if (so == NULL) 719 ERROUT(ENXIO); 720 721 /* Make sure the socket is capable of accepting */ 722 if (!(so->so_options & SO_ACCEPTCONN)) 723 ERROUT(EINVAL); 724 if (priv->flags & KSF_ACCEPTING) 725 ERROUT(EALREADY); 726 727 error = ng_ksocket_check_accept(priv); 728 if (error != 0 && error != EWOULDBLOCK) 729 ERROUT(error); 730 731 /* 732 * If a connection is already complete, take it. 733 * Otherwise let the upcall function deal with 734 * the connection when it comes in. 735 */ 736 priv->response_token = msg->header.token; 737 raddr = priv->response_addr = NGI_RETADDR(item); 738 if (error == 0) { 739 ng_ksocket_finish_accept(priv); 740 } else 741 priv->flags |= KSF_ACCEPTING; 742 break; 743 } 744 745 case NGM_KSOCKET_CONNECT: 746 { 747 struct sockaddr *const sa 748 = (struct sockaddr *)msg->data; 749 750 /* Sanity check */ 751 if (msg->header.arglen < SADATA_OFFSET 752 || msg->header.arglen < sa->sa_len) 753 ERROUT(EINVAL); 754 if (so == NULL) 755 ERROUT(ENXIO); 756 757 /* Do connect */ 758 if ((so->so_state & SS_ISCONNECTING) != 0) 759 ERROUT(EALREADY); 760 if ((error = soconnect(so, sa, td)) != 0) { 761 so->so_state &= ~SS_ISCONNECTING; 762 ERROUT(error); 763 } 764 if ((so->so_state & SS_ISCONNECTING) != 0) { 765 /* We will notify the sender when we connect */ 766 priv->response_token = msg->header.token; 767 raddr = priv->response_addr = NGI_RETADDR(item); 768 priv->flags |= KSF_CONNECTING; 769 ERROUT(EINPROGRESS); 770 } 771 break; 772 } 773 774 case NGM_KSOCKET_GETNAME: 775 case NGM_KSOCKET_GETPEERNAME: 776 { 777 int (*func)(struct socket *so, struct sockaddr **nam); 778 struct sockaddr *sa = NULL; 779 int len; 780 781 /* Sanity check */ 782 if (msg->header.arglen != 0) 783 ERROUT(EINVAL); 784 if (so == NULL) 785 ERROUT(ENXIO); 786 787 /* Get function */ 788 if (msg->header.cmd == NGM_KSOCKET_GETPEERNAME) { 789 if ((so->so_state 790 & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) 791 ERROUT(ENOTCONN); 792 func = so->so_proto->pr_usrreqs->pru_peeraddr; 793 } else 794 func = so->so_proto->pr_usrreqs->pru_sockaddr; 795 796 /* Get local or peer address */ 797 if ((error = (*func)(so, &sa)) != 0) 798 goto bail; 799 len = (sa == NULL) ? 0 : sa->sa_len; 800 801 /* Send it back in a response */ 802 NG_MKRESPONSE(resp, msg, len, M_NOWAIT); 803 if (resp == NULL) { 804 error = ENOMEM; 805 goto bail; 806 } 807 bcopy(sa, resp->data, len); 808 809 bail: 810 /* Cleanup */ 811 if (sa != NULL) 812 free(sa, M_SONAME); 813 break; 814 } 815 816 case NGM_KSOCKET_GETOPT: 817 { 818 struct ng_ksocket_sockopt *ksopt = 819 (struct ng_ksocket_sockopt *)msg->data; 820 struct sockopt sopt; 821 822 /* Sanity check */ 823 if (msg->header.arglen != sizeof(*ksopt)) 824 ERROUT(EINVAL); 825 if (so == NULL) 826 ERROUT(ENXIO); 827 828 /* Get response with room for option value */ 829 NG_MKRESPONSE(resp, msg, sizeof(*ksopt) 830 + NG_KSOCKET_MAX_OPTLEN, M_NOWAIT); 831 if (resp == NULL) 832 ERROUT(ENOMEM); 833 834 /* Get socket option, and put value in the response */ 835 sopt.sopt_dir = SOPT_GET; 836 sopt.sopt_level = ksopt->level; 837 sopt.sopt_name = ksopt->name; 838 sopt.sopt_td = NULL; 839 sopt.sopt_valsize = NG_KSOCKET_MAX_OPTLEN; 840 ksopt = (struct ng_ksocket_sockopt *)resp->data; 841 sopt.sopt_val = ksopt->value; 842 if ((error = sogetopt(so, &sopt)) != 0) { 843 NG_FREE_MSG(resp); 844 break; 845 } 846 847 /* Set actual value length */ 848 resp->header.arglen = sizeof(*ksopt) 849 + sopt.sopt_valsize; 850 break; 851 } 852 853 case NGM_KSOCKET_SETOPT: 854 { 855 struct ng_ksocket_sockopt *const ksopt = 856 (struct ng_ksocket_sockopt *)msg->data; 857 const int valsize = msg->header.arglen - sizeof(*ksopt); 858 struct sockopt sopt; 859 860 /* Sanity check */ 861 if (valsize < 0) 862 ERROUT(EINVAL); 863 if (so == NULL) 864 ERROUT(ENXIO); 865 866 /* Set socket option */ 867 sopt.sopt_dir = SOPT_SET; 868 sopt.sopt_level = ksopt->level; 869 sopt.sopt_name = ksopt->name; 870 sopt.sopt_val = ksopt->value; 871 sopt.sopt_valsize = valsize; 872 sopt.sopt_td = NULL; 873 error = sosetopt(so, &sopt); 874 break; 875 } 876 877 default: 878 error = EINVAL; 879 break; 880 } 881 break; 882 default: 883 error = EINVAL; 884 break; 885 } 886 done: 887 NG_RESPOND_MSG(error, node, item, resp); 888 NG_FREE_MSG(msg); 889 return (error); 890 } 891 892 /* 893 * Receive incoming data on our hook. Send it out the socket. 894 */ 895 static int 896 ng_ksocket_rcvdata(hook_p hook, item_p item) 897 { 898 struct thread *td = curthread; /* XXX broken */ 899 const node_p node = NG_HOOK_NODE(hook); 900 const priv_p priv = NG_NODE_PRIVATE(node); 901 struct socket *const so = priv->so; 902 struct sockaddr *sa = NULL; 903 int error; 904 struct mbuf *m; 905 #ifdef ALIGNED_POINTER 906 struct mbuf *n; 907 #endif /* ALIGNED_POINTER */ 908 struct sa_tag *stag; 909 910 /* Extract data */ 911 NGI_GET_M(item, m); 912 NG_FREE_ITEM(item); 913 #ifdef ALIGNED_POINTER 914 if (!ALIGNED_POINTER(mtod(m, caddr_t), uint32_t)) { 915 n = m_defrag(m, M_NOWAIT); 916 if (n == NULL) { 917 m_freem(m); 918 return (ENOBUFS); 919 } 920 m = n; 921 } 922 #endif /* ALIGNED_POINTER */ 923 /* 924 * Look if socket address is stored in packet tags. 925 * If sockaddr is ours, or provided by a third party (zero id), 926 * then we accept it. 927 */ 928 if (((stag = (struct sa_tag *)m_tag_locate(m, NGM_KSOCKET_COOKIE, 929 NG_KSOCKET_TAG_SOCKADDR, NULL)) != NULL) && 930 (stag->id == NG_NODE_ID(node) || stag->id == 0)) 931 sa = &stag->sa; 932 933 /* Reset specific mbuf flags to prevent addressing problems. */ 934 m->m_flags &= ~(M_BCAST|M_MCAST); 935 936 /* Send packet */ 937 error = sosend(so, sa, 0, m, 0, 0, td); 938 939 return (error); 940 } 941 942 /* 943 * Destroy node 944 */ 945 static int 946 ng_ksocket_shutdown(node_p node) 947 { 948 const priv_p priv = NG_NODE_PRIVATE(node); 949 priv_p embryo; 950 951 /* Close our socket (if any) */ 952 if (priv->so != NULL) { 953 SOCKBUF_LOCK(&priv->so->so_rcv); 954 soupcall_clear(priv->so, SO_RCV); 955 SOCKBUF_UNLOCK(&priv->so->so_rcv); 956 SOCKBUF_LOCK(&priv->so->so_snd); 957 soupcall_clear(priv->so, SO_SND); 958 SOCKBUF_UNLOCK(&priv->so->so_snd); 959 soclose(priv->so); 960 priv->so = NULL; 961 } 962 963 /* If we are an embryo, take ourselves out of the parent's list */ 964 if (priv->flags & KSF_EMBRYONIC) { 965 LIST_REMOVE(priv, siblings); 966 priv->flags &= ~KSF_EMBRYONIC; 967 } 968 969 /* Remove any embryonic children we have */ 970 while (!LIST_EMPTY(&priv->embryos)) { 971 embryo = LIST_FIRST(&priv->embryos); 972 ng_rmnode_self(embryo->node); 973 } 974 975 /* Take down netgraph node */ 976 bzero(priv, sizeof(*priv)); 977 free(priv, M_NETGRAPH_KSOCKET); 978 NG_NODE_SET_PRIVATE(node, NULL); 979 NG_NODE_UNREF(node); /* let the node escape */ 980 return (0); 981 } 982 983 /* 984 * Hook disconnection 985 */ 986 static int 987 ng_ksocket_disconnect(hook_p hook) 988 { 989 KASSERT(NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0, 990 ("%s: numhooks=%d?", __func__, 991 NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)))); 992 if (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))) 993 ng_rmnode_self(NG_HOOK_NODE(hook)); 994 return (0); 995 } 996 997 /************************************************************************ 998 HELPER STUFF 999 ************************************************************************/ 1000 /* 1001 * You should not "just call" a netgraph node function from an external 1002 * asynchronous event. This is because in doing so you are ignoring the 1003 * locking on the netgraph nodes. Instead call your function via ng_send_fn(). 1004 * This will call the function you chose, but will first do all the 1005 * locking rigmarole. Your function MAY only be called at some distant future 1006 * time (several millisecs away) so don't give it any arguments 1007 * that may be revoked soon (e.g. on your stack). 1008 * 1009 * To decouple stack, we use queue version of ng_send_fn(). 1010 */ 1011 1012 static int 1013 ng_ksocket_incoming(struct socket *so, void *arg, int waitflag) 1014 { 1015 const node_p node = arg; 1016 const priv_p priv = NG_NODE_PRIVATE(node); 1017 int wait = ((waitflag & M_WAITOK) ? NG_WAITOK : 0) | NG_QUEUE; 1018 1019 /* 1020 * Even if node is not locked, as soon as we are called, we assume 1021 * it exist and it's private area is valid. With some care we can 1022 * access it. Mark node that incoming event for it was sent to 1023 * avoid unneded queue trashing. 1024 */ 1025 if (atomic_cmpset_int(&priv->fn_sent, 0, 1) && 1026 ng_send_fn1(node, NULL, &ng_ksocket_incoming2, so, 0, wait)) { 1027 atomic_store_rel_int(&priv->fn_sent, 0); 1028 } 1029 return (SU_OK); 1030 } 1031 1032 1033 /* 1034 * When incoming data is appended to the socket, we get notified here. 1035 * This is also called whenever a significant event occurs for the socket. 1036 * Our original caller may have queued this even some time ago and 1037 * we cannot trust that he even still exists. The node however is being 1038 * held with a reference by the queueing code and guarantied to be valid. 1039 */ 1040 static void 1041 ng_ksocket_incoming2(node_p node, hook_p hook, void *arg1, int arg2) 1042 { 1043 struct socket *so = arg1; 1044 const priv_p priv = NG_NODE_PRIVATE(node); 1045 struct ng_mesg *response; 1046 struct uio auio; 1047 int flags, 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 mbuf's */ 1097 auio.uio_td = NULL; 1098 auio.uio_resid = 1000000000; 1099 flags = MSG_DONTWAIT; 1100 while (1) { 1101 struct sockaddr *sa = NULL; 1102 struct mbuf *m; 1103 1104 /* Try to get next packet from socket */ 1105 if ((error = soreceive(so, (so->so_state & SS_ISCONNECTED) ? 1106 NULL : &sa, &auio, &m, NULL, &flags)) != 0) 1107 break; 1108 1109 /* See if we got anything */ 1110 if (m == NULL) { 1111 if (sa != NULL) 1112 free(sa, M_SONAME); 1113 break; 1114 } 1115 1116 KASSERT(m->m_nextpkt == NULL, ("%s: nextpkt", __func__)); 1117 1118 /* 1119 * Stream sockets do not have packet boundaries, so 1120 * we have to allocate a header mbuf and attach the 1121 * stream of data to it. 1122 */ 1123 if (so->so_type == SOCK_STREAM) { 1124 struct mbuf *mh; 1125 1126 mh = m_gethdr(M_NOWAIT, MT_DATA); 1127 if (mh == NULL) { 1128 m_freem(m); 1129 if (sa != NULL) 1130 free(sa, M_SONAME); 1131 break; 1132 } 1133 1134 mh->m_next = m; 1135 for (; m; m = m->m_next) 1136 mh->m_pkthdr.len += m->m_len; 1137 m = mh; 1138 } 1139 1140 /* Put peer's socket address (if any) into a tag */ 1141 if (sa != NULL) { 1142 struct sa_tag *stag; 1143 1144 stag = (struct sa_tag *)m_tag_alloc(NGM_KSOCKET_COOKIE, 1145 NG_KSOCKET_TAG_SOCKADDR, sizeof(ng_ID_t) + 1146 sa->sa_len, M_NOWAIT); 1147 if (stag == NULL) { 1148 free(sa, M_SONAME); 1149 goto sendit; 1150 } 1151 bcopy(sa, &stag->sa, sa->sa_len); 1152 free(sa, M_SONAME); 1153 stag->id = NG_NODE_ID(node); 1154 m_tag_prepend(m, &stag->tag); 1155 } 1156 1157 sendit: /* Forward data with optional peer sockaddr as packet tag */ 1158 NG_SEND_DATA_ONLY(error, priv->hook, m); 1159 } 1160 1161 /* 1162 * If the peer has closed the connection, forward a 0-length mbuf 1163 * to indicate end-of-file. 1164 */ 1165 if (so->so_rcv.sb_state & SBS_CANTRCVMORE && 1166 !(priv->flags & KSF_EOFSEEN)) { 1167 struct mbuf *m; 1168 1169 m = m_gethdr(M_NOWAIT, MT_DATA); 1170 if (m != NULL) 1171 NG_SEND_DATA_ONLY(error, priv->hook, m); 1172 priv->flags |= KSF_EOFSEEN; 1173 } 1174 } 1175 1176 /* 1177 * Check for a completed incoming connection and return 0 if one is found. 1178 * Otherwise return the appropriate error code. 1179 */ 1180 static int 1181 ng_ksocket_check_accept(priv_p priv) 1182 { 1183 struct socket *const head = priv->so; 1184 int error; 1185 1186 if ((error = head->so_error) != 0) { 1187 head->so_error = 0; 1188 return error; 1189 } 1190 /* Unlocked read. */ 1191 if (TAILQ_EMPTY(&head->so_comp)) { 1192 if (head->so_rcv.sb_state & SBS_CANTRCVMORE) 1193 return ECONNABORTED; 1194 return EWOULDBLOCK; 1195 } 1196 return 0; 1197 } 1198 1199 /* 1200 * Handle the first completed incoming connection, assumed to be already 1201 * on the socket's so_comp queue. 1202 */ 1203 static void 1204 ng_ksocket_finish_accept(priv_p priv) 1205 { 1206 struct socket *const head = priv->so; 1207 struct socket *so; 1208 struct sockaddr *sa = NULL; 1209 struct ng_mesg *resp; 1210 struct ng_ksocket_accept *resp_data; 1211 node_p node; 1212 priv_p priv2; 1213 int len; 1214 int error; 1215 1216 ACCEPT_LOCK(); 1217 so = TAILQ_FIRST(&head->so_comp); 1218 if (so == NULL) { /* Should never happen */ 1219 ACCEPT_UNLOCK(); 1220 return; 1221 } 1222 TAILQ_REMOVE(&head->so_comp, so, so_list); 1223 head->so_qlen--; 1224 so->so_qstate &= ~SQ_COMP; 1225 so->so_head = NULL; 1226 SOCK_LOCK(so); 1227 soref(so); 1228 so->so_state |= SS_NBIO; 1229 SOCK_UNLOCK(so); 1230 ACCEPT_UNLOCK(); 1231 1232 /* XXX KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0); */ 1233 1234 soaccept(so, &sa); 1235 1236 len = OFFSETOF(struct ng_ksocket_accept, addr); 1237 if (sa != NULL) 1238 len += sa->sa_len; 1239 1240 NG_MKMESSAGE(resp, NGM_KSOCKET_COOKIE, NGM_KSOCKET_ACCEPT, len, 1241 M_NOWAIT); 1242 if (resp == NULL) { 1243 soclose(so); 1244 goto out; 1245 } 1246 resp->header.flags |= NGF_RESP; 1247 resp->header.token = priv->response_token; 1248 1249 /* Clone a ksocket node to wrap the new socket */ 1250 error = ng_make_node_common(&ng_ksocket_typestruct, &node); 1251 if (error) { 1252 free(resp, M_NETGRAPH); 1253 soclose(so); 1254 goto out; 1255 } 1256 1257 if (ng_ksocket_constructor(node) != 0) { 1258 NG_NODE_UNREF(node); 1259 free(resp, M_NETGRAPH); 1260 soclose(so); 1261 goto out; 1262 } 1263 1264 priv2 = NG_NODE_PRIVATE(node); 1265 priv2->so = so; 1266 priv2->flags |= KSF_CLONED | KSF_EMBRYONIC; 1267 1268 /* 1269 * Insert the cloned node into a list of embryonic children 1270 * on the parent node. When a hook is created on the cloned 1271 * node it will be removed from this list. When the parent 1272 * is destroyed it will destroy any embryonic children it has. 1273 */ 1274 LIST_INSERT_HEAD(&priv->embryos, priv2, siblings); 1275 1276 SOCKBUF_LOCK(&so->so_rcv); 1277 soupcall_set(so, SO_RCV, ng_ksocket_incoming, node); 1278 SOCKBUF_UNLOCK(&so->so_rcv); 1279 SOCKBUF_LOCK(&so->so_snd); 1280 soupcall_set(so, SO_SND, ng_ksocket_incoming, node); 1281 SOCKBUF_UNLOCK(&so->so_snd); 1282 1283 /* Fill in the response data and send it or return it to the caller */ 1284 resp_data = (struct ng_ksocket_accept *)resp->data; 1285 resp_data->nodeid = NG_NODE_ID(node); 1286 if (sa != NULL) 1287 bcopy(sa, &resp_data->addr, sa->sa_len); 1288 NG_SEND_MSG_ID(error, node, resp, priv->response_addr, 0); 1289 1290 out: 1291 if (sa != NULL) 1292 free(sa, M_SONAME); 1293 } 1294 1295 /* 1296 * Parse out either an integer value or an alias. 1297 */ 1298 static int 1299 ng_ksocket_parse(const struct ng_ksocket_alias *aliases, 1300 const char *s, int family) 1301 { 1302 int k, val; 1303 char *eptr; 1304 1305 /* Try aliases */ 1306 for (k = 0; aliases[k].name != NULL; k++) { 1307 if (strcmp(s, aliases[k].name) == 0 1308 && aliases[k].family == family) 1309 return aliases[k].value; 1310 } 1311 1312 /* Try parsing as a number */ 1313 val = (int)strtoul(s, &eptr, 10); 1314 if (val < 0 || *eptr != '\0') 1315 return (-1); 1316 return (val); 1317 } 1318
Cache object: a296f5c3947b7569884b528753cfc81f
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]