1 2 /* 3 * ng_ksocket.c 4 * 5 * Copyright (c) 1996-1999 Whistle Communications, Inc. 6 * All rights reserved. 7 * 8 * Subject to the following obligations and disclaimer of warranty, use and 9 * redistribution of this software, in source or object code forms, with or 10 * without modifications are expressly permitted by Whistle Communications; 11 * provided, however, that: 12 * 1. Any and all reproductions of the source or object code must include the 13 * copyright notice above and the following disclaimer of warranties; and 14 * 2. No rights are granted, in any manner or form, to use Whistle 15 * Communications, Inc. trademarks, including the mark "WHISTLE 16 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 17 * such appears in the above copyright notice or in the software. 18 * 19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 27 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 29 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 30 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 31 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 35 * OF SUCH DAMAGE. 36 * 37 * Author: Archie Cobbs <archie@freebsd.org> 38 * 39 * $FreeBSD$ 40 * $Whistle: ng_ksocket.c,v 1.1 1999/11/16 20:04:40 archie Exp $ 41 */ 42 43 /* 44 * Kernel socket node type. This node type is basically a kernel-mode 45 * version of a socket... kindof like the reverse of the socket node type. 46 */ 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/mbuf.h> 52 #include <sys/proc.h> 53 #include <sys/malloc.h> 54 #include <sys/ctype.h> 55 #include <sys/protosw.h> 56 #include <sys/errno.h> 57 #include <sys/socket.h> 58 #include <sys/socketvar.h> 59 #include <sys/uio.h> 60 #include <sys/un.h> 61 62 #include <netgraph/ng_message.h> 63 #include <netgraph/netgraph.h> 64 #include <netgraph/ng_parse.h> 65 #include <netgraph/ng_ksocket.h> 66 67 #include <netinet/in.h> 68 #include <netatalk/at.h> 69 70 #ifdef NG_SEPARATE_MALLOC 71 MALLOC_DEFINE(M_NETGRAPH_KSOCKET, "netgraph_ksock", "netgraph ksock node "); 72 #else 73 #define M_NETGRAPH_KSOCKET M_NETGRAPH 74 #endif 75 76 #define OFFSETOF(s, e) ((char *)&((s *)0)->e - (char *)((s *)0)) 77 #define SADATA_OFFSET (OFFSETOF(struct sockaddr, sa_data)) 78 79 /* Node private data */ 80 struct ng_ksocket_private { 81 hook_p hook; 82 struct socket *so; 83 }; 84 typedef struct ng_ksocket_private *priv_p; 85 86 /* Netgraph node methods */ 87 static ng_constructor_t ng_ksocket_constructor; 88 static ng_rcvmsg_t ng_ksocket_rcvmsg; 89 static ng_shutdown_t ng_ksocket_shutdown; 90 static ng_newhook_t ng_ksocket_newhook; 91 static ng_rcvdata_t ng_ksocket_rcvdata; 92 static ng_disconnect_t ng_ksocket_disconnect; 93 94 /* Alias structure */ 95 struct ng_ksocket_alias { 96 const char *name; 97 const int value; 98 const int family; 99 }; 100 101 /* Protocol family aliases */ 102 static const struct ng_ksocket_alias ng_ksocket_families[] = { 103 { "local", PF_LOCAL }, 104 { "inet", PF_INET }, 105 { "inet6", PF_INET6 }, 106 { "atalk", PF_APPLETALK }, 107 { "ipx", PF_IPX }, 108 { "atm", PF_ATM }, 109 { NULL, -1 }, 110 }; 111 112 /* Socket type aliases */ 113 static const struct ng_ksocket_alias ng_ksocket_types[] = { 114 { "stream", SOCK_STREAM }, 115 { "dgram", SOCK_DGRAM }, 116 { "raw", SOCK_RAW }, 117 { "rdm", SOCK_RDM }, 118 { "seqpacket", SOCK_SEQPACKET }, 119 { NULL, -1 }, 120 }; 121 122 /* Protocol aliases */ 123 static const struct ng_ksocket_alias ng_ksocket_protos[] = { 124 { "ip", IPPROTO_IP, PF_INET }, 125 { "raw", IPPROTO_IP, PF_INET }, 126 { "icmp", IPPROTO_ICMP, PF_INET }, 127 { "igmp", IPPROTO_IGMP, PF_INET }, 128 { "tcp", IPPROTO_TCP, PF_INET }, 129 { "udp", IPPROTO_UDP, PF_INET }, 130 { "gre", IPPROTO_GRE, PF_INET }, 131 { "esp", IPPROTO_ESP, PF_INET }, 132 { "ah", IPPROTO_AH, PF_INET }, 133 { "swipe", IPPROTO_SWIPE, PF_INET }, 134 { "encap", IPPROTO_ENCAP, PF_INET }, 135 { "divert", IPPROTO_DIVERT, PF_INET }, 136 { "ddp", ATPROTO_DDP, PF_APPLETALK }, 137 { "aarp", ATPROTO_AARP, PF_APPLETALK }, 138 { NULL, -1 }, 139 }; 140 141 /* Helper functions */ 142 static void ng_ksocket_incoming(struct socket *so, void *arg, int waitflag); 143 static int ng_ksocket_parse(const struct ng_ksocket_alias *aliases, 144 const char *s, int family); 145 146 /************************************************************************ 147 STRUCT SOCKADDR PARSE TYPE 148 ************************************************************************/ 149 150 /* Get the length of the data portion of a generic struct sockaddr */ 151 static int 152 ng_parse_generic_sockdata_getLength(const struct ng_parse_type *type, 153 const u_char *start, const u_char *buf) 154 { 155 const struct sockaddr *sa; 156 157 sa = (const struct sockaddr *)(buf - SADATA_OFFSET); 158 return (sa->sa_len < SADATA_OFFSET) ? 0 : sa->sa_len - SADATA_OFFSET; 159 } 160 161 /* Type for the variable length data portion of a generic struct sockaddr */ 162 static const struct ng_parse_type ng_ksocket_generic_sockdata_type = { 163 &ng_parse_bytearray_type, 164 &ng_parse_generic_sockdata_getLength 165 }; 166 167 /* Type for a generic struct sockaddr */ 168 static const struct ng_parse_struct_info ng_parse_generic_sockaddr_type_info = { 169 { 170 { "len", &ng_parse_uint8_type }, 171 { "family", &ng_parse_uint8_type }, 172 { "data", &ng_ksocket_generic_sockdata_type }, 173 { NULL } 174 } 175 }; 176 static const struct ng_parse_type ng_ksocket_generic_sockaddr_type = { 177 &ng_parse_struct_type, 178 &ng_parse_generic_sockaddr_type_info 179 }; 180 181 /* Convert a struct sockaddr from ASCII to binary. If its a protocol 182 family that we specially handle, do that, otherwise defer to the 183 generic parse type ng_ksocket_generic_sockaddr_type. */ 184 static int 185 ng_ksocket_sockaddr_parse(const struct ng_parse_type *type, 186 const char *s, int *off, const u_char *const start, 187 u_char *const buf, int *buflen) 188 { 189 struct sockaddr *const sa = (struct sockaddr *)buf; 190 enum ng_parse_token tok; 191 char fambuf[32]; 192 int family, len; 193 char *t; 194 195 /* If next token is a left curly brace, use generic parse type */ 196 if ((tok = ng_parse_get_token(s, off, &len)) == T_LBRACE) { 197 return (*ng_ksocket_generic_sockaddr_type.supertype->parse) 198 (&ng_ksocket_generic_sockaddr_type, 199 s, off, start, buf, buflen); 200 } 201 202 /* Get socket address family followed by a slash */ 203 while (isspace(s[*off])) 204 (*off)++; 205 if ((t = index(s + *off, '/')) == NULL) 206 return (EINVAL); 207 if ((len = t - (s + *off)) > sizeof(fambuf) - 1) 208 return (EINVAL); 209 strncpy(fambuf, s + *off, len); 210 fambuf[len] = '\0'; 211 *off += len + 1; 212 if ((family = ng_ksocket_parse(ng_ksocket_families, fambuf, 0)) == -1) 213 return (EINVAL); 214 215 /* Set family */ 216 if (*buflen < SADATA_OFFSET) 217 return (ERANGE); 218 sa->sa_family = family; 219 220 /* Set family-specific data and length */ 221 switch (sa->sa_family) { 222 case PF_LOCAL: /* Get pathname */ 223 { 224 const int pathoff = OFFSETOF(struct sockaddr_un, sun_path); 225 struct sockaddr_un *const sun = (struct sockaddr_un *)sa; 226 int toklen, pathlen; 227 char *path; 228 229 if ((path = ng_get_string_token(s, off, &toklen, NULL)) == NULL) 230 return (EINVAL); 231 pathlen = strlen(path); 232 if (pathlen > SOCK_MAXADDRLEN) { 233 FREE(path, M_NETGRAPH_KSOCKET); 234 return (E2BIG); 235 } 236 if (*buflen < pathoff + pathlen) { 237 FREE(path, M_NETGRAPH_KSOCKET); 238 return (ERANGE); 239 } 240 *off += toklen; 241 bcopy(path, sun->sun_path, pathlen); 242 sun->sun_len = pathoff + pathlen; 243 FREE(path, M_NETGRAPH_KSOCKET); 244 break; 245 } 246 247 case PF_INET: /* Get an IP address with optional port */ 248 { 249 struct sockaddr_in *const sin = (struct sockaddr_in *)sa; 250 int i; 251 252 /* Parse this: <ipaddress>[:port] */ 253 for (i = 0; i < 4; i++) { 254 u_long val; 255 char *eptr; 256 257 val = strtoul(s + *off, &eptr, 10); 258 if (val > 0xff || eptr == s + *off) 259 return (EINVAL); 260 *off += (eptr - (s + *off)); 261 ((u_char *)&sin->sin_addr)[i] = (u_char)val; 262 if (i < 3) { 263 if (s[*off] != '.') 264 return (EINVAL); 265 (*off)++; 266 } else if (s[*off] == ':') { 267 (*off)++; 268 val = strtoul(s + *off, &eptr, 10); 269 if (val > 0xffff || eptr == s + *off) 270 return (EINVAL); 271 *off += (eptr - (s + *off)); 272 sin->sin_port = htons(val); 273 } else 274 sin->sin_port = 0; 275 } 276 bzero(&sin->sin_zero, sizeof(sin->sin_zero)); 277 sin->sin_len = sizeof(*sin); 278 break; 279 } 280 281 #if 0 282 case PF_APPLETALK: /* XXX implement these someday */ 283 case PF_INET6: 284 case PF_IPX: 285 #endif 286 287 default: 288 return (EINVAL); 289 } 290 291 /* Done */ 292 *buflen = sa->sa_len; 293 return (0); 294 } 295 296 /* Convert a struct sockaddr from binary to ASCII */ 297 static int 298 ng_ksocket_sockaddr_unparse(const struct ng_parse_type *type, 299 const u_char *data, int *off, char *cbuf, int cbuflen) 300 { 301 const struct sockaddr *sa = (const struct sockaddr *)(data + *off); 302 int slen = 0; 303 304 /* Output socket address, either in special or generic format */ 305 switch (sa->sa_family) { 306 case PF_LOCAL: 307 { 308 const int pathoff = OFFSETOF(struct sockaddr_un, sun_path); 309 const struct sockaddr_un *sun = (const struct sockaddr_un *)sa; 310 const int pathlen = sun->sun_len - pathoff; 311 char pathbuf[SOCK_MAXADDRLEN + 1]; 312 char *pathtoken; 313 314 bcopy(sun->sun_path, pathbuf, pathlen); 315 if ((pathtoken = ng_encode_string(pathbuf, pathlen)) == NULL) 316 return (ENOMEM); 317 slen += snprintf(cbuf, cbuflen, "local/%s", pathtoken); 318 FREE(pathtoken, M_NETGRAPH_KSOCKET); 319 if (slen >= cbuflen) 320 return (ERANGE); 321 *off += sun->sun_len; 322 return (0); 323 } 324 325 case PF_INET: 326 { 327 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa; 328 329 slen += snprintf(cbuf, cbuflen, "inet/%d.%d.%d.%d", 330 ((const u_char *)&sin->sin_addr)[0], 331 ((const u_char *)&sin->sin_addr)[1], 332 ((const u_char *)&sin->sin_addr)[2], 333 ((const u_char *)&sin->sin_addr)[3]); 334 if (sin->sin_port != 0) { 335 slen += snprintf(cbuf + strlen(cbuf), 336 cbuflen - strlen(cbuf), ":%d", 337 (u_int)ntohs(sin->sin_port)); 338 } 339 if (slen >= cbuflen) 340 return (ERANGE); 341 *off += sizeof(*sin); 342 return(0); 343 } 344 345 #if 0 346 case PF_APPLETALK: /* XXX implement these someday */ 347 case PF_INET6: 348 case PF_IPX: 349 #endif 350 351 default: 352 return (*ng_ksocket_generic_sockaddr_type.supertype->unparse) 353 (&ng_ksocket_generic_sockaddr_type, 354 data, off, cbuf, cbuflen); 355 } 356 } 357 358 /* Parse type for struct sockaddr */ 359 static const struct ng_parse_type ng_ksocket_sockaddr_type = { 360 NULL, 361 NULL, 362 NULL, 363 &ng_ksocket_sockaddr_parse, 364 &ng_ksocket_sockaddr_unparse, 365 NULL /* no such thing as a default struct sockaddr */ 366 }; 367 368 /************************************************************************ 369 STRUCT NG_KSOCKET_SOCKOPT PARSE TYPE 370 ************************************************************************/ 371 372 /* Get length of the struct ng_ksocket_sockopt value field, which is the 373 just the excess of the message argument portion over the length of 374 the struct ng_ksocket_sockopt. */ 375 static int 376 ng_parse_sockoptval_getLength(const struct ng_parse_type *type, 377 const u_char *start, const u_char *buf) 378 { 379 static const int offset = OFFSETOF(struct ng_ksocket_sockopt, value); 380 const struct ng_ksocket_sockopt *sopt; 381 const struct ng_mesg *msg; 382 383 sopt = (const struct ng_ksocket_sockopt *)(buf - offset); 384 msg = (const struct ng_mesg *)((const u_char *)sopt - sizeof(*msg)); 385 return msg->header.arglen - sizeof(*sopt); 386 } 387 388 /* Parse type for the option value part of a struct ng_ksocket_sockopt 389 XXX Eventually, we should handle the different socket options specially. 390 XXX This would avoid byte order problems, eg an integer value of 1 is 391 XXX going to be "[1]" for little endian or "[3=1]" for big endian. */ 392 static const struct ng_parse_type ng_ksocket_sockoptval_type = { 393 &ng_parse_bytearray_type, 394 &ng_parse_sockoptval_getLength 395 }; 396 397 /* Parse type for struct ng_ksocket_sockopt */ 398 static const struct ng_parse_struct_info ng_ksocket_sockopt_type_info 399 = NG_KSOCKET_SOCKOPT_INFO(&ng_ksocket_sockoptval_type); 400 static const struct ng_parse_type ng_ksocket_sockopt_type = { 401 &ng_parse_struct_type, 402 &ng_ksocket_sockopt_type_info, 403 }; 404 405 /* List of commands and how to convert arguments to/from ASCII */ 406 static const struct ng_cmdlist ng_ksocket_cmds[] = { 407 { 408 NGM_KSOCKET_COOKIE, 409 NGM_KSOCKET_BIND, 410 "bind", 411 &ng_ksocket_sockaddr_type, 412 NULL 413 }, 414 { 415 NGM_KSOCKET_COOKIE, 416 NGM_KSOCKET_LISTEN, 417 "listen", 418 &ng_parse_int32_type, 419 NULL 420 }, 421 { 422 NGM_KSOCKET_COOKIE, 423 NGM_KSOCKET_ACCEPT, 424 "accept", 425 NULL, 426 &ng_ksocket_sockaddr_type 427 }, 428 { 429 NGM_KSOCKET_COOKIE, 430 NGM_KSOCKET_CONNECT, 431 "connect", 432 &ng_ksocket_sockaddr_type, 433 NULL 434 }, 435 { 436 NGM_KSOCKET_COOKIE, 437 NGM_KSOCKET_GETNAME, 438 "getname", 439 NULL, 440 &ng_ksocket_sockaddr_type 441 }, 442 { 443 NGM_KSOCKET_COOKIE, 444 NGM_KSOCKET_GETPEERNAME, 445 "getpeername", 446 NULL, 447 &ng_ksocket_sockaddr_type 448 }, 449 { 450 NGM_KSOCKET_COOKIE, 451 NGM_KSOCKET_SETOPT, 452 "setopt", 453 &ng_ksocket_sockopt_type, 454 NULL 455 }, 456 { 457 NGM_KSOCKET_COOKIE, 458 NGM_KSOCKET_GETOPT, 459 "getopt", 460 &ng_ksocket_sockopt_type, 461 &ng_ksocket_sockopt_type 462 }, 463 { 0 } 464 }; 465 466 /* Node type descriptor */ 467 static struct ng_type ng_ksocket_typestruct = { 468 NG_ABI_VERSION, 469 NG_KSOCKET_NODE_TYPE, 470 NULL, 471 ng_ksocket_constructor, 472 ng_ksocket_rcvmsg, 473 ng_ksocket_shutdown, 474 ng_ksocket_newhook, 475 NULL, 476 NULL, 477 ng_ksocket_rcvdata, 478 ng_ksocket_disconnect, 479 ng_ksocket_cmds 480 }; 481 NETGRAPH_INIT(ksocket, &ng_ksocket_typestruct); 482 483 #define ERROUT(x) do { error = (x); goto done; } while (0) 484 485 /************************************************************************ 486 NETGRAPH NODE STUFF 487 ************************************************************************/ 488 489 /* 490 * Node type constructor 491 */ 492 static int 493 ng_ksocket_constructor(node_p node) 494 { 495 priv_p priv; 496 497 /* Allocate private structure */ 498 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH_KSOCKET, M_NOWAIT | M_ZERO); 499 if (priv == NULL) 500 return (ENOMEM); 501 502 NG_NODE_SET_PRIVATE(node, priv); 503 504 /* Done */ 505 return (0); 506 } 507 508 /* 509 * Give our OK for a hook to be added. The hook name is of the 510 * form "<family>:<type>:<proto>" where the three components may 511 * be decimal numbers or else aliases from the above lists. 512 * 513 * Connecting a hook amounts to opening the socket. Disconnecting 514 * the hook closes the socket and destroys the node as well. 515 */ 516 static int 517 ng_ksocket_newhook(node_p node, hook_p hook, const char *name0) 518 { 519 struct proc *p = curproc ? curproc : &proc0; /* XXX broken */ 520 const priv_p priv = NG_NODE_PRIVATE(node); 521 char *s1, *s2, name[NG_HOOKLEN+1]; 522 int family, type, protocol, error; 523 524 /* Check if we're already connected */ 525 if (priv->hook != NULL) 526 return (EISCONN); 527 528 /* Extract family, type, and protocol from hook name */ 529 snprintf(name, sizeof(name), "%s", name0); 530 s1 = name; 531 if ((s2 = index(s1, '/')) == NULL) 532 return (EINVAL); 533 *s2++ = '\0'; 534 if ((family = ng_ksocket_parse(ng_ksocket_families, s1, 0)) == -1) 535 return (EINVAL); 536 s1 = s2; 537 if ((s2 = index(s1, '/')) == NULL) 538 return (EINVAL); 539 *s2++ = '\0'; 540 if ((type = ng_ksocket_parse(ng_ksocket_types, s1, 0)) == -1) 541 return (EINVAL); 542 s1 = s2; 543 if ((protocol = ng_ksocket_parse(ng_ksocket_protos, s1, family)) == -1) 544 return (EINVAL); 545 546 /* Create the socket */ 547 if ((error = socreate(family, &priv->so, type, protocol, p)) != 0) 548 return (error); 549 550 /* XXX call soreserve() ? */ 551 552 /* Add our hook for incoming data */ 553 priv->so->so_upcallarg = (caddr_t)node; 554 priv->so->so_upcall = ng_ksocket_incoming; 555 priv->so->so_rcv.sb_flags |= SB_UPCALL; 556 557 /* OK */ 558 priv->hook = hook; 559 return (0); 560 } 561 562 /* 563 * Receive a control message 564 */ 565 static int 566 ng_ksocket_rcvmsg(node_p node, item_p item, hook_p lasthook) 567 { 568 struct proc *p = curproc ? curproc : &proc0; /* XXX broken */ 569 const priv_p priv = NG_NODE_PRIVATE(node); 570 struct socket *const so = priv->so; 571 struct ng_mesg *resp = NULL; 572 int error = 0; 573 struct ng_mesg *msg; 574 575 NGI_GET_MSG(item, msg); 576 switch (msg->header.typecookie) { 577 case NGM_KSOCKET_COOKIE: 578 switch (msg->header.cmd) { 579 case NGM_KSOCKET_BIND: 580 { 581 struct sockaddr *const sa 582 = (struct sockaddr *)msg->data; 583 584 /* Sanity check */ 585 if (msg->header.arglen < SADATA_OFFSET 586 || msg->header.arglen < sa->sa_len) 587 ERROUT(EINVAL); 588 if (so == NULL) 589 ERROUT(ENXIO); 590 591 /* Bind */ 592 error = sobind(so, sa, p); 593 break; 594 } 595 case NGM_KSOCKET_LISTEN: 596 { 597 /* Sanity check */ 598 if (msg->header.arglen != sizeof(int)) 599 ERROUT(EINVAL); 600 if (so == NULL) 601 ERROUT(ENXIO); 602 603 /* Listen */ 604 if ((error = solisten(so, *((int *)msg->data), p)) != 0) 605 break; 606 607 /* Notify sender when we get a connection attempt */ 608 /* XXX implement me */ 609 error = ENODEV; 610 break; 611 } 612 613 case NGM_KSOCKET_ACCEPT: 614 { 615 /* Sanity check */ 616 if (msg->header.arglen != 0) 617 ERROUT(EINVAL); 618 if (so == NULL) 619 ERROUT(ENXIO); 620 621 /* Accept on the socket in a non-blocking way */ 622 /* Create a new ksocket node for the new connection */ 623 /* Return a response with the peer's sockaddr and 624 the absolute name of the newly created node */ 625 626 /* XXX implement me */ 627 628 error = ENODEV; 629 break; 630 } 631 632 case NGM_KSOCKET_CONNECT: 633 { 634 struct sockaddr *const sa 635 = (struct sockaddr *)msg->data; 636 637 /* Sanity check */ 638 if (msg->header.arglen < SADATA_OFFSET 639 || msg->header.arglen < sa->sa_len) 640 ERROUT(EINVAL); 641 if (so == NULL) 642 ERROUT(ENXIO); 643 644 /* Do connect */ 645 if ((so->so_state & SS_ISCONNECTING) != 0) 646 ERROUT(EALREADY); 647 if ((error = soconnect(so, sa, p)) != 0) { 648 so->so_state &= ~SS_ISCONNECTING; 649 ERROUT(error); 650 } 651 if ((so->so_state & SS_ISCONNECTING) != 0) 652 /* Notify sender when we connect */ 653 /* XXX implement me */ 654 ERROUT(EINPROGRESS); 655 break; 656 } 657 658 case NGM_KSOCKET_GETNAME: 659 case NGM_KSOCKET_GETPEERNAME: 660 { 661 int (*func)(struct socket *so, struct sockaddr **nam); 662 struct sockaddr *sa = NULL; 663 int len; 664 665 /* Sanity check */ 666 if (msg->header.arglen != 0) 667 ERROUT(EINVAL); 668 if (so == NULL) 669 ERROUT(ENXIO); 670 671 /* Get function */ 672 if (msg->header.cmd == NGM_KSOCKET_GETPEERNAME) { 673 if ((so->so_state 674 & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) 675 ERROUT(ENOTCONN); 676 func = so->so_proto->pr_usrreqs->pru_peeraddr; 677 } else 678 func = so->so_proto->pr_usrreqs->pru_sockaddr; 679 680 /* Get local or peer address */ 681 if ((error = (*func)(so, &sa)) != 0) 682 goto bail; 683 len = (sa == NULL) ? 0 : sa->sa_len; 684 685 /* Send it back in a response */ 686 NG_MKRESPONSE(resp, msg, len, M_NOWAIT); 687 if (resp == NULL) { 688 error = ENOMEM; 689 goto bail; 690 } 691 bcopy(sa, resp->data, len); 692 693 bail: 694 /* Cleanup */ 695 if (sa != NULL) 696 FREE(sa, M_SONAME); 697 break; 698 } 699 700 case NGM_KSOCKET_GETOPT: 701 { 702 struct ng_ksocket_sockopt *ksopt = 703 (struct ng_ksocket_sockopt *)msg->data; 704 struct sockopt sopt; 705 706 /* Sanity check */ 707 if (msg->header.arglen != sizeof(*ksopt)) 708 ERROUT(EINVAL); 709 if (so == NULL) 710 ERROUT(ENXIO); 711 712 /* Get response with room for option value */ 713 NG_MKRESPONSE(resp, msg, sizeof(*ksopt) 714 + NG_KSOCKET_MAX_OPTLEN, M_NOWAIT); 715 if (resp == NULL) 716 ERROUT(ENOMEM); 717 718 /* Get socket option, and put value in the response */ 719 sopt.sopt_dir = SOPT_GET; 720 sopt.sopt_level = ksopt->level; 721 sopt.sopt_name = ksopt->name; 722 sopt.sopt_p = p; 723 sopt.sopt_valsize = NG_KSOCKET_MAX_OPTLEN; 724 ksopt = (struct ng_ksocket_sockopt *)resp->data; 725 sopt.sopt_val = ksopt->value; 726 if ((error = sogetopt(so, &sopt)) != 0) { 727 NG_FREE_MSG(resp); 728 break; 729 } 730 731 /* Set actual value length */ 732 resp->header.arglen = sizeof(*ksopt) 733 + sopt.sopt_valsize; 734 break; 735 } 736 737 case NGM_KSOCKET_SETOPT: 738 { 739 struct ng_ksocket_sockopt *const ksopt = 740 (struct ng_ksocket_sockopt *)msg->data; 741 const int valsize = msg->header.arglen - sizeof(*ksopt); 742 struct sockopt sopt; 743 744 /* Sanity check */ 745 if (valsize < 0) 746 ERROUT(EINVAL); 747 if (so == NULL) 748 ERROUT(ENXIO); 749 750 /* Set socket option */ 751 sopt.sopt_dir = SOPT_SET; 752 sopt.sopt_level = ksopt->level; 753 sopt.sopt_name = ksopt->name; 754 sopt.sopt_val = ksopt->value; 755 sopt.sopt_valsize = valsize; 756 sopt.sopt_p = p; 757 error = sosetopt(so, &sopt); 758 break; 759 } 760 761 default: 762 error = EINVAL; 763 break; 764 } 765 break; 766 default: 767 error = EINVAL; 768 break; 769 } 770 done: 771 NG_RESPOND_MSG(error, node, item, resp); 772 NG_FREE_MSG(msg); 773 return (error); 774 } 775 776 /* 777 * Receive incoming data on our hook. Send it out the socket. 778 */ 779 static int 780 ng_ksocket_rcvdata(hook_p hook, item_p item) 781 { 782 struct proc *p = curproc ? curproc : &proc0; /* XXX broken */ 783 const node_p node = NG_HOOK_NODE(hook); 784 const priv_p priv = NG_NODE_PRIVATE(node); 785 struct socket *const so = priv->so; 786 int error; 787 struct mbuf *m; 788 789 NGI_GET_M(item, m); 790 NG_FREE_ITEM(item); 791 error = (*so->so_proto->pr_usrreqs->pru_sosend)(so, 0, 0, m, 0, 0, p); 792 return (error); 793 } 794 795 /* 796 * Destroy node 797 */ 798 static int 799 ng_ksocket_shutdown(node_p node) 800 { 801 const priv_p priv = NG_NODE_PRIVATE(node); 802 803 /* Close our socket (if any) */ 804 if (priv->so != NULL) { 805 806 priv->so->so_upcall = NULL; 807 priv->so->so_rcv.sb_flags &= ~SB_UPCALL; 808 soclose(priv->so); 809 priv->so = NULL; 810 } 811 812 /* Take down netgraph node */ 813 bzero(priv, sizeof(*priv)); 814 FREE(priv, M_NETGRAPH_KSOCKET); 815 NG_NODE_SET_PRIVATE(node, NULL); 816 NG_NODE_UNREF(node); /* let the node escape */ 817 return (0); 818 } 819 820 /* 821 * Hook disconnection 822 */ 823 static int 824 ng_ksocket_disconnect(hook_p hook) 825 { 826 KASSERT(NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0, 827 ("%s: numhooks=%d?", __FUNCTION__, NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)))); 828 if (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))) 829 ng_rmnode_self(NG_HOOK_NODE(hook)); 830 return (0); 831 } 832 833 /************************************************************************ 834 HELPER STUFF 835 ************************************************************************/ 836 837 /* 838 * When incoming data is appended to the socket, we get notified here. 839 */ 840 static void 841 ng_ksocket_incoming(struct socket *so, void *arg, int waitflag) 842 { 843 const node_p node = arg; 844 const priv_p priv = NG_NODE_PRIVATE(node); 845 struct mbuf *m; 846 struct uio auio; 847 int s, flags, error; 848 849 s = splnet(); 850 851 /* Sanity check */ 852 if (NG_NODE_NOT_VALID(node)) { 853 splx(s); 854 return; 855 } 856 KASSERT(so == priv->so, ("%s: wrong socket", __FUNCTION__)); 857 KASSERT(priv->hook != NULL, ("%s: no hook", __FUNCTION__)); 858 859 /* Read and forward available mbuf's */ 860 auio.uio_procp = NULL; 861 auio.uio_resid = 1000000000; 862 flags = MSG_DONTWAIT; 863 do { 864 if ((error = (*so->so_proto->pr_usrreqs->pru_soreceive) 865 (so, (struct sockaddr **)0, &auio, &m, 866 (struct mbuf **)0, &flags)) == 0 867 && m != NULL) { 868 struct mbuf *n; 869 870 /* Don't trust the various socket layers to get the 871 packet header and length correct (eg. kern/15175) */ 872 for (n = m, m->m_pkthdr.len = 0; n; n = n->m_next) 873 m->m_pkthdr.len += n->m_len; 874 NG_SEND_DATA_ONLY(error, priv->hook, m); 875 } 876 } while (error == 0 && m != NULL); 877 splx(s); 878 } 879 880 /* 881 * Parse out either an integer value or an alias. 882 */ 883 static int 884 ng_ksocket_parse(const struct ng_ksocket_alias *aliases, 885 const char *s, int family) 886 { 887 int k, val; 888 char *eptr; 889 890 /* Try aliases */ 891 for (k = 0; aliases[k].name != NULL; k++) { 892 if (strcmp(s, aliases[k].name) == 0 893 && aliases[k].family == family) 894 return aliases[k].value; 895 } 896 897 /* Try parsing as a number */ 898 val = (int)strtoul(s, &eptr, 10); 899 if (val < 0 || *eptr != '\0') 900 return (-1); 901 return (val); 902 } 903 904