| File: | src/usr.sbin/npppd/npppd/../l2tp/l2tpd.c |
| Warning: | line 267, column 2 Value stored to 'sock' is never read |
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| 1 | /* $OpenBSD: l2tpd.c,v 1.22 2021/03/29 03:54:39 yasuoka Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2009 Internet Initiative Japan Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | /**@file L2TP(Layer Two Tunneling Protocol "L2TP") / RFC2661 */ |
| 29 | /* $Id: l2tpd.c,v 1.22 2021/03/29 03:54:39 yasuoka Exp $ */ |
| 30 | #include <sys/types.h> |
| 31 | #include <sys/socket.h> |
| 32 | #include <sys/time.h> |
| 33 | #include <netinet/in.h> |
| 34 | #include <netinet/udp.h> |
| 35 | #include <stdlib.h> |
| 36 | #include <arpa/inet.h> |
| 37 | #include <stdio.h> |
| 38 | #include <unistd.h> |
| 39 | #include <netdb.h> |
| 40 | #include <syslog.h> |
| 41 | #include <signal.h> |
| 42 | #include <string.h> |
| 43 | #include <fcntl.h> |
| 44 | #include <errno(*__errno()).h> |
| 45 | #include <stdarg.h> |
| 46 | #include <event.h> |
| 47 | |
| 48 | #ifdef USE_LIBSOCKUTIL |
| 49 | #include <seil/sockfromto.h> |
| 50 | #else |
| 51 | #include "recvfromto.h" |
| 52 | #endif |
| 53 | |
| 54 | #include "bytebuf.h" |
| 55 | #include "hash.h" |
| 56 | #include "slist.h" |
| 57 | #include "debugutil.h" |
| 58 | #include "l2tp.h" |
| 59 | #include "l2tp_subr.h" |
| 60 | #include "l2tp_local.h" |
| 61 | #include "addr_range.h" |
| 62 | #include "net_utils.h" |
| 63 | |
| 64 | #ifdef L2TPD_DEBUG |
| 65 | #define L2TPD_ASSERT(x) ASSERT(x)((void)0); |
| 66 | #define L2TPD_DBG(x) l2tpd_log x |
| 67 | #else |
| 68 | #define L2TPD_ASSERT(x) |
| 69 | #endif |
| 70 | #define L2TPD_IPSEC_POLICY_IN"in ipsec esp/transport//require" "in ipsec esp/transport//require" |
| 71 | #define L2TPD_IPSEC_POLICY_OUT"out ipsec esp/transport//require" "out ipsec esp/transport//require" |
| 72 | |
| 73 | static void l2tpd_io_event (int, short, void *); |
| 74 | static inline int short_cmp (const void *, const void *); |
| 75 | static inline uint32_t short_hash (const void *, int); |
| 76 | |
| 77 | /* sequence # of l2tpd ID */ |
| 78 | static u_int l2tpd_id_seq = 0; |
| 79 | |
| 80 | /* L2TP daemon instance */ |
| 81 | |
| 82 | /** |
| 83 | * initialize L2TP daemon instance |
| 84 | * <p> |
| 85 | * {@link _l2tpd#bind_sin} will return with .sin_family = AF_INET, |
| 86 | * .sin_port = 1701 and .sin_len = "appropriate value" |
| 87 | * </p> |
| 88 | */ |
| 89 | int |
| 90 | l2tpd_init(l2tpd *_this) |
| 91 | { |
| 92 | int i, off; |
| 93 | u_int id; |
| 94 | |
| 95 | L2TPD_ASSERT(_this != NULL); |
| 96 | memset(_this, 0, sizeof(l2tpd)); |
| 97 | |
| 98 | slist_init(&_this->listener); |
| 99 | slist_init(&_this->free_session_id_list); |
| 100 | |
| 101 | _this->id = l2tpd_id_seq++; |
| 102 | |
| 103 | if ((_this->ctrl_map = hash_create(short_cmp, short_hash, |
| 104 | L2TPD_TUNNEL_HASH_SIZ127)) == NULL((void *)0)) { |
| 105 | log_printf(LOG_ERR3, "hash_create() failed in %s(): %m", |
| 106 | __func__); |
| 107 | return 1; |
| 108 | } |
| 109 | |
| 110 | if (slist_add(&_this->free_session_id_list, |
| 111 | (void *)L2TP_SESSION_ID_SHUFFLE_MARK0x10000000) == NULL((void *)0)) { |
| 112 | l2tpd_log(_this, LOG_ERR3, "slist_add() failed on %s(): %m", |
| 113 | __func__); |
| 114 | return 1; |
| 115 | } |
| 116 | off = arc4random() & L2TP_SESSION_ID_MASK0x00007fff; |
| 117 | for (i = 0; i < L2TP_NCALL10000; i++) { |
| 118 | id = (i + off) & L2TP_SESSION_ID_MASK0x00007fff; |
| 119 | if (id == 0) |
| 120 | id = (off - 1) & L2TP_SESSION_ID_MASK0x00007fff; |
| 121 | if (slist_add(&_this->free_session_id_list, |
| 122 | (void *)(uintptr_t)id) == NULL((void *)0)) { |
| 123 | l2tpd_log(_this, LOG_ERR3, |
| 124 | "slist_add() failed on %s(): %m", __func__); |
| 125 | return 1; |
| 126 | } |
| 127 | } |
| 128 | _this->purge_ipsec_sa = 1; |
| 129 | _this->state = L2TPD_STATE_INIT0; |
| 130 | |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | /* |
| 135 | * Add a {@link :l2tpd_listener} to the {@link ::l2tpd L2TP daemon} |
| 136 | * @param _this {@link ::l2tpd L2TP daemon} |
| 137 | * @param idx index of the lisnter |
| 138 | * @param tun_name tunnel name (ex. "L2TP") |
| 139 | * @param bindaddr bind address |
| 140 | */ |
| 141 | int |
| 142 | l2tpd_add_listener(l2tpd *_this, int idx, struct l2tp_conf *conf, |
| 143 | struct sockaddr *addr) |
| 144 | { |
| 145 | l2tpd_listener *plistener, *plsnr; |
| 146 | |
| 147 | plistener = NULL((void *)0); |
| 148 | if (idx == 0 && slist_length(&_this->listener) > 0) { |
| 149 | slist_itr_first(&_this->listener); |
| 150 | while (slist_itr_has_next(&_this->listener)) { |
| 151 | slist_itr_next(&_this->listener); |
| 152 | plsnr = slist_itr_remove(&_this->listener); |
| 153 | L2TPD_ASSERT(plsnr != NULL); |
| 154 | L2TPD_ASSERT(plsnr->sock == -1); |
| 155 | free(plsnr); |
| 156 | } |
| 157 | } |
| 158 | L2TPD_ASSERT(slist_length(&_this->listener) == idx); |
| 159 | if (slist_length(&_this->listener) != idx) { |
| 160 | l2tpd_log(_this, LOG_ERR3, |
| 161 | "Invalid argument error on %s(): idx must be %d but %d", |
| 162 | __func__, slist_length(&_this->listener), idx); |
| 163 | goto fail; |
| 164 | } |
| 165 | if ((plistener = calloc(1, sizeof(l2tpd_listener))) == NULL((void *)0)) { |
| 166 | l2tpd_log(_this, LOG_ERR3, "calloc() failed in %s: %m", |
| 167 | __func__); |
| 168 | goto fail; |
| 169 | } |
| 170 | L2TPD_ASSERT(sizeof(plistener->bind) >= addr->sa_len); |
| 171 | memcpy(&plistener->bind, addr, addr->sa_len); |
| 172 | |
| 173 | if (plistener->bind.sin6.sin6_port == 0) |
| 174 | plistener->bind.sin6.sin6_port = htons(L2TPD_DEFAULT_UDP_PORT)(__uint16_t)(__builtin_constant_p(1701) ? (__uint16_t)(((__uint16_t )(1701) & 0xffU) << 8 | ((__uint16_t)(1701) & 0xff00U ) >> 8) : __swap16md(1701)); |
| 175 | |
| 176 | plistener->sock = -1; |
| 177 | plistener->self = _this; |
| 178 | plistener->index = idx; |
| 179 | plistener->conf = conf; |
| 180 | strlcpy(plistener->tun_name, conf->name, sizeof(plistener->tun_name)); |
| 181 | |
| 182 | if (slist_add(&_this->listener, plistener) == NULL((void *)0)) { |
| 183 | l2tpd_log(_this, LOG_ERR3, "slist_add() failed in %s: %m", |
| 184 | __func__); |
| 185 | goto fail; |
| 186 | } |
| 187 | return 0; |
| 188 | fail: |
| 189 | free(plistener); |
| 190 | return 1; |
| 191 | } |
| 192 | |
| 193 | /* finalize L2TP daemon instance */ |
| 194 | void |
| 195 | l2tpd_uninit(l2tpd *_this) |
| 196 | { |
| 197 | l2tpd_listener *plsnr; |
| 198 | |
| 199 | L2TPD_ASSERT(_this != NULL); |
| 200 | |
| 201 | slist_fini(&_this->free_session_id_list); |
| 202 | if (_this->ctrl_map != NULL((void *)0)) { |
| 203 | hash_free(_this->ctrl_map); |
| 204 | _this->ctrl_map = NULL((void *)0); |
| 205 | } |
| 206 | |
| 207 | slist_itr_first(&_this->listener); |
| 208 | while (slist_itr_has_next(&_this->listener)) { |
| 209 | plsnr = slist_itr_next(&_this->listener); |
| 210 | L2TPD_ASSERT(plsnr != NULL); |
| 211 | L2TPD_ASSERT(plsnr->sock == -1); |
| 212 | free(plsnr); |
| 213 | } |
| 214 | slist_fini(&_this->listener); |
| 215 | |
| 216 | event_del(&_this->ev_timeout); /* just in case */ |
| 217 | _this->state = L2TPD_STATE_STOPPED3; |
| 218 | } |
| 219 | |
| 220 | /** assign the call to the l2tpd */ |
| 221 | int |
| 222 | l2tpd_assign_call(l2tpd *_this, l2tp_call *call) |
| 223 | { |
| 224 | int shuffle_cnt; |
| 225 | u_int session_id; |
| 226 | |
| 227 | shuffle_cnt = 0; |
| 228 | do { |
| 229 | session_id = (uintptr_t)slist_remove_first( |
| 230 | &_this->free_session_id_list); |
| 231 | if (session_id != L2TP_SESSION_ID_SHUFFLE_MARK0x10000000) |
| 232 | break; |
| 233 | L2TPD_ASSERT(shuffle_cnt == 0); |
| 234 | if (shuffle_cnt++ > 0) { |
| 235 | l2tpd_log(_this, LOG_ERR3, |
| 236 | "unexpected error in %s(): free_session_id_list " |
| 237 | "full", __func__); |
| 238 | slist_add(&_this->free_session_id_list, |
| 239 | (void *)L2TP_SESSION_ID_SHUFFLE_MARK0x10000000); |
| 240 | return 1; |
| 241 | } |
| 242 | slist_shuffle(&_this->free_session_id_list); |
| 243 | slist_add(&_this->free_session_id_list, |
| 244 | (void *)L2TP_SESSION_ID_SHUFFLE_MARK0x10000000); |
| 245 | } while (1); |
| 246 | call->id = session_id; |
| 247 | |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | /* this function will be called when the call is released */ |
| 252 | void |
| 253 | l2tpd_release_call(l2tpd *_this, l2tp_call *call) |
| 254 | { |
| 255 | slist_add(&_this->free_session_id_list, (void *)(uintptr_t)call->id); |
| 256 | } |
| 257 | |
| 258 | /* start l2tpd listener */ |
| 259 | static int |
| 260 | l2tpd_listener_start(l2tpd_listener *_this) |
| 261 | { |
| 262 | l2tpd *_l2tpd; |
| 263 | int af, lvl, opt, sock, ival; |
| 264 | char hbuf[NI_MAXHOST256 + NI_MAXSERV32 + 16]; |
| 265 | |
| 266 | _l2tpd = _this->self; |
| 267 | sock = -1; |
Value stored to 'sock' is never read | |
| 268 | af = _this->bind.sin6.sin6_family; |
| 269 | lvl = (af == AF_INET2)? IPPROTO_IP0 : IPPROTO_IPV641; |
| 270 | |
| 271 | if (_this->tun_name[0] == '\0') |
| 272 | strlcpy(_this->tun_name, L2TPD_DEFAULT_LAYER2_LABEL"L2TP", |
| 273 | sizeof(_this->tun_name)); |
| 274 | if ((sock = socket(_this->bind.sin6.sin6_family, |
| 275 | SOCK_DGRAM2 | SOCK_NONBLOCK0x4000, IPPROTO_UDP17)) < 0) { |
| 276 | l2tpd_log(_l2tpd, LOG_ERR3, |
| 277 | "socket() failed in %s(): %m", __func__); |
| 278 | goto fail; |
| 279 | } |
| 280 | #if defined(IP_STRICT_RCVIF) && defined(USE_STRICT_RCVIF) |
| 281 | ival = 1; |
| 282 | if (setsockopt(sock, IPPROTO_IP0, IP_STRICT_RCVIF, &ival, sizeof(ival)) |
| 283 | != 0) |
| 284 | l2tpd_log(_l2tpd, LOG_WARNING4, |
| 285 | "%s(): setsockopt(IP_STRICT_RCVIF) failed: %m", __func__); |
| 286 | #endif |
| 287 | ival = 1; |
| 288 | if (setsockopt(sock, SOL_SOCKET0xffff, SO_REUSEPORT0x0200, &ival, sizeof(ival)) |
| 289 | != 0) { |
| 290 | l2tpd_log(_l2tpd, LOG_ERR3, |
| 291 | "setsockopt(,,SO_REUSEPORT) failed in %s(): %m", __func__); |
| 292 | goto fail; |
| 293 | } |
| 294 | if (bind(sock, (struct sockaddr *)&_this->bind, |
| 295 | _this->bind.sin6.sin6_len) != 0) { |
| 296 | l2tpd_log(_l2tpd, LOG_ERR3, "Binding %s/udp: %m", |
| 297 | addrport_tostring((struct sockaddr *)&_this->bind, |
| 298 | _this->bind.sin6.sin6_len, hbuf, sizeof(hbuf))); |
| 299 | goto fail; |
| 300 | } |
| 301 | #ifdef USE_LIBSOCKUTIL |
| 302 | if (setsockoptfromto(sock) != 0) { |
| 303 | l2tpd_log(_l2tpd, LOG_ERR3, |
| 304 | "setsockoptfromto() failed in %s(): %m", __func__); |
| 305 | goto fail; |
| 306 | } |
| 307 | #else |
| 308 | opt = (af == AF_INET2)? IP_RECVDSTADDR7 : IPV6_RECVPKTINFO36; |
| 309 | ival = 1; |
| 310 | if (setsockopt(sock, lvl, opt, &ival, sizeof(ival)) != 0) { |
| 311 | l2tpd_log(_l2tpd, LOG_ERR3, |
| 312 | "setsockopt(,,IP{,V6}_RECVDSTADDR) failed in %s(): %m", |
| 313 | __func__); |
| 314 | goto fail; |
| 315 | } |
| 316 | #endif |
| 317 | #ifdef USE_SA_COOKIE1 |
| 318 | if (af == AF_INET2) { |
| 319 | ival = 1; |
| 320 | if (setsockopt(sock, IPPROTO_IP0, IP_IPSECFLOWINFO36, &ival, |
| 321 | sizeof(ival)) != 0) { |
| 322 | l2tpd_log(_l2tpd, LOG_ERR3, |
| 323 | "setsockopt(,,IP_IPSECFLOWINFO) failed in %s(): %m", |
| 324 | __func__); |
| 325 | goto fail; |
| 326 | } |
| 327 | } |
| 328 | #endif |
| 329 | #ifdef IP_PIPEX34 |
| 330 | opt = (af == AF_INET2)? IP_PIPEX34 : IPV6_PIPEX63; |
| 331 | ival = 1; |
| 332 | if (setsockopt(sock, lvl, opt, &ival, sizeof(ival)) != 0) |
| 333 | l2tpd_log(_l2tpd, LOG_WARNING4, |
| 334 | "%s(): setsockopt(IP{,V6}_PIPEX) failed: %m", __func__); |
| 335 | #endif |
| 336 | if (_this->conf->require_ipsec) { |
| 337 | #ifdef IP_IPSEC_POLICY |
| 338 | caddr_t ipsec_policy_in, ipsec_policy_out; |
| 339 | |
| 340 | opt = (af == AF_INET2)? IP_IPSEC_POLICY : IPV6_IPSEC_POLICY; |
| 341 | /* |
| 342 | * Note: ipsec_set_policy() will assign the buffer for |
| 343 | * yacc parser stack, however it never free. |
| 344 | * it cause memory leak (-2000byte). |
| 345 | */ |
| 346 | if ((ipsec_policy_in = ipsec_set_policy(L2TPD_IPSEC_POLICY_IN"in ipsec esp/transport//require", |
| 347 | strlen(L2TPD_IPSEC_POLICY_IN"in ipsec esp/transport//require"))) == NULL((void *)0)) { |
| 348 | l2tpd_log(_l2tpd, LOG_ERR3, |
| 349 | "ipsec_set_policy(L2TPD_IPSEC_POLICY_IN) failed " |
| 350 | "at %s(): %s: %m", __func__, ipsec_strerror()); |
| 351 | } else if (setsockopt(sock, lvl, opt, ipsec_policy_in, |
| 352 | ipsec_get_policylen(ipsec_policy_in)) < 0) { |
| 353 | l2tpd_log(_l2tpd, LOG_WARNING4, |
| 354 | "setsockopt(,,IP_IPSEC_POLICY(in)) failed " |
| 355 | "in %s(): %m", __func__); |
| 356 | } |
| 357 | if ((ipsec_policy_out = ipsec_set_policy(L2TPD_IPSEC_POLICY_OUT"out ipsec esp/transport//require", |
| 358 | strlen(L2TPD_IPSEC_POLICY_OUT"out ipsec esp/transport//require"))) == NULL((void *)0)) { |
| 359 | l2tpd_log(_l2tpd, LOG_ERR3, |
| 360 | "ipsec_set_policy(L2TPD_IPSEC_POLICY_OUT) failed " |
| 361 | "at %s(): %s: %m", __func__, ipsec_strerror()); |
| 362 | } |
| 363 | if (ipsec_policy_out != NULL((void *)0) && |
| 364 | setsockopt(sock, lvl, opt, ipsec_policy_out, |
| 365 | ipsec_get_policylen(ipsec_policy_out)) < 0) { |
| 366 | l2tpd_log(_l2tpd, LOG_WARNING4, |
| 367 | "setsockopt(,,IP_IPSEC_POLICY(out)) failed " |
| 368 | "in %s(): %m", __func__); |
| 369 | } |
| 370 | free(ipsec_policy_in); |
| 371 | free(ipsec_policy_out); |
| 372 | #elif defined(IP_ESP_TRANS_LEVEL21) |
| 373 | opt = (af == AF_INET2) |
| 374 | ? IP_ESP_TRANS_LEVEL21 : IPV6_ESP_TRANS_LEVEL54; |
| 375 | ival = IPSEC_LEVEL_REQUIRE0x03; |
| 376 | if (setsockopt(sock, lvl, opt, &ival, sizeof(ival)) != 0) { |
| 377 | l2tpd_log(_l2tpd, LOG_WARNING4, |
| 378 | "setsockopt(,,IP{,V6}_ESP_TRANS_LEVEL(out)) failed " |
| 379 | "in %s(): %m", __func__); |
| 380 | } |
| 381 | #else |
| 382 | #error IP_IPSEC_POLICY or IP_ESP_TRANS_LEVEL21 must be usable. |
| 383 | #endif |
| 384 | } |
| 385 | |
| 386 | _this->sock = sock; |
| 387 | |
| 388 | event_set(&_this->ev_sock, _this->sock, EV_READ0x02 | EV_PERSIST0x10, |
| 389 | l2tpd_io_event, _this); |
| 390 | event_add(&_this->ev_sock, NULL((void *)0)); |
| 391 | |
| 392 | l2tpd_log(_l2tpd, LOG_INFO6, "Listening %s/udp (L2TP LNS) [%s]", |
| 393 | addrport_tostring((struct sockaddr *)&_this->bind, |
| 394 | _this->bind.sin6.sin6_len, hbuf, sizeof(hbuf)), _this->tun_name); |
| 395 | |
| 396 | return 0; |
| 397 | fail: |
| 398 | if (sock >= 0) |
| 399 | close(sock); |
| 400 | |
| 401 | return 1; |
| 402 | } |
| 403 | |
| 404 | /* start L2TP daemon */ |
| 405 | int |
| 406 | l2tpd_start(l2tpd *_this) |
| 407 | { |
| 408 | int rval; |
| 409 | l2tpd_listener *plsnr; |
| 410 | |
| 411 | rval = 0; |
| 412 | |
| 413 | L2TPD_ASSERT(_this->state == L2TPD_STATE_INIT); |
| 414 | if (_this->state != L2TPD_STATE_INIT0) { |
| 415 | l2tpd_log(_this, LOG_ERR3, "Failed to start l2tpd: illegal " |
| 416 | "state."); |
| 417 | return -1; |
| 418 | } |
| 419 | |
| 420 | slist_itr_first(&_this->listener); |
| 421 | while (slist_itr_has_next(&_this->listener)) { |
| 422 | plsnr = slist_itr_next(&_this->listener); |
| 423 | rval |= l2tpd_listener_start(plsnr); |
| 424 | } |
| 425 | |
| 426 | if (rval == 0) |
| 427 | _this->state = L2TPD_STATE_RUNNING1; |
| 428 | |
| 429 | return rval; |
| 430 | } |
| 431 | |
| 432 | /* stop l2tp lisnter */ |
| 433 | static void |
| 434 | l2tpd_listener_stop(l2tpd_listener *_this) |
| 435 | { |
| 436 | char hbuf[NI_MAXHOST256 + NI_MAXSERV32 + 16]; |
| 437 | |
| 438 | if (_this->sock >= 0) { |
| 439 | event_del(&_this->ev_sock); |
| 440 | close(_this->sock); |
| 441 | l2tpd_log(_this->self, LOG_INFO6, |
| 442 | "Shutdown %s/udp (L2TP LNS)", |
| 443 | addrport_tostring((struct sockaddr *)&_this->bind, |
| 444 | _this->bind.sin6.sin6_len, hbuf, sizeof(hbuf))); |
| 445 | _this->sock = -1; |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | /* stop immediattly without disconnect operation */ |
| 450 | void |
| 451 | l2tpd_stop_immediatly(l2tpd *_this) |
| 452 | { |
| 453 | l2tpd_listener *plsnr; |
| 454 | |
| 455 | slist_itr_first(&_this->listener); |
| 456 | while (slist_itr_has_next(&_this->listener)) { |
| 457 | plsnr = slist_itr_next(&_this->listener); |
| 458 | l2tpd_listener_stop(plsnr); |
| 459 | } |
| 460 | event_del(&_this->ev_timeout); /* XXX */ |
| 461 | _this->state = L2TPD_STATE_STOPPED3; |
| 462 | } |
| 463 | |
| 464 | /* |
| 465 | * this function will be called when {@link ::_l2tp_ctrl control} |
| 466 | * is terminated. |
| 467 | */ |
| 468 | void |
| 469 | l2tpd_ctrl_finished_notify(l2tpd *_this) |
| 470 | { |
| 471 | if (_this->state != L2TPD_STATE_SHUTTING_DOWN2) |
| 472 | return; |
| 473 | |
| 474 | if (hash_first(_this->ctrl_map) != NULL((void *)0)) |
| 475 | return; |
| 476 | |
| 477 | l2tpd_stop_immediatly(_this); |
| 478 | } |
| 479 | |
| 480 | static void |
| 481 | l2tpd_stop_timeout(int fd, short evtype, void *ctx) |
| 482 | { |
| 483 | hash_link *hl; |
| 484 | l2tp_ctrl *ctrl; |
| 485 | l2tpd *_this; |
| 486 | |
| 487 | _this = ctx; |
| 488 | l2tpd_log(_this, LOG_INFO6, "Shutdown timeout"); |
| 489 | for (hl = hash_first(_this->ctrl_map); hl != NULL((void *)0); |
| 490 | hl = hash_next(_this->ctrl_map)) { |
| 491 | ctrl = hl->item; |
| 492 | l2tp_ctrl_stop(ctrl, 0); |
| 493 | } |
| 494 | l2tpd_stop_immediatly(_this); |
| 495 | } |
| 496 | |
| 497 | /* stop L2TP daemon */ |
| 498 | void |
| 499 | l2tpd_stop(l2tpd *_this) |
| 500 | { |
| 501 | int nctrls = 0; |
| 502 | hash_link *hl; |
| 503 | l2tp_ctrl *ctrl; |
| 504 | |
| 505 | nctrls = 0; |
| 506 | event_del(&_this->ev_timeout); |
| 507 | if (l2tpd_is_stopped(_this)(((_this)->state != 2 && (_this)->state != 1)? 1 : 0)) |
| 508 | return; |
| 509 | if (l2tpd_is_shutting_down(_this)(((_this)->state == 2)? 1 : 0)) { |
| 510 | /* terminate immediately, when 2nd call */ |
| 511 | l2tpd_stop_immediatly(_this); |
| 512 | return; |
| 513 | } |
| 514 | for (hl = hash_first(_this->ctrl_map); hl != NULL((void *)0); |
| 515 | hl = hash_next(_this->ctrl_map)) { |
| 516 | ctrl = hl->item; |
| 517 | l2tp_ctrl_stop(ctrl, L2TP_STOP_CCN_RCODE_SHUTTING_DOWN6); |
| 518 | nctrls++; |
| 519 | } |
| 520 | _this->state = L2TPD_STATE_SHUTTING_DOWN2; |
| 521 | if (nctrls > 0) { |
| 522 | struct timeval tv0; |
| 523 | |
| 524 | tv0.tv_usec = 0; |
| 525 | tv0.tv_sec = L2TPD_SHUTDOWN_TIMEOUT5; |
| 526 | |
| 527 | evtimer_set(&_this->ev_timeout, l2tpd_stop_timeout, _this)event_set(&_this->ev_timeout, -1, 0, l2tpd_stop_timeout , _this); |
| 528 | evtimer_add(&_this->ev_timeout, &tv0)event_add(&_this->ev_timeout, &tv0); |
| 529 | |
| 530 | return; |
| 531 | } |
| 532 | l2tpd_stop_immediatly(_this); |
| 533 | } |
| 534 | |
| 535 | /* |
| 536 | * Configuration |
| 537 | */ |
| 538 | int |
| 539 | l2tpd_reload(l2tpd *_this, struct l2tp_confs *l2tp_conf) |
| 540 | { |
| 541 | int i; |
| 542 | struct l2tp_conf *conf; |
| 543 | l2tpd_listener *listener; |
| 544 | struct l2tp_listen_addr *addr; |
| 545 | |
| 546 | if (slist_length(&_this->listener) > 0) { |
| 547 | /* |
| 548 | * TODO: add / remove / restart listener. |
| 549 | */ |
| 550 | slist_itr_first(&_this->listener); |
| 551 | while (slist_itr_has_next(&_this->listener)) { |
| 552 | listener = slist_itr_next(&_this->listener); |
| 553 | TAILQ_FOREACH(conf, l2tp_conf, entry)for((conf) = ((l2tp_conf)->tqh_first); (conf) != ((void *) 0); (conf) = ((conf)->entry.tqe_next)) { |
| 554 | if (strcmp(listener->tun_name, |
| 555 | conf->name) == 0) { |
| 556 | listener->conf = conf; |
| 557 | break; |
| 558 | } |
| 559 | } |
| 560 | } |
| 561 | |
| 562 | return 0; |
| 563 | } |
| 564 | |
| 565 | i = 0; |
| 566 | TAILQ_FOREACH(conf, l2tp_conf, entry)for((conf) = ((l2tp_conf)->tqh_first); (conf) != ((void *) 0); (conf) = ((conf)->entry.tqe_next)) { |
| 567 | TAILQ_FOREACH(addr, &conf->listen, entry)for((addr) = ((&conf->listen)->tqh_first); (addr) != ((void *)0); (addr) = ((addr)->entry.tqe_next)) |
| 568 | l2tpd_add_listener(_this, i++, conf, |
| 569 | (struct sockaddr *)&addr->addr); |
| 570 | } |
| 571 | if (l2tpd_start(_this) != 0) |
| 572 | return -1; |
| 573 | |
| 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | /* |
| 578 | * I/O functions |
| 579 | */ |
| 580 | /* logging when deny an access */ |
| 581 | void |
| 582 | l2tpd_log_access_deny(l2tpd *_this, const char *reason, struct sockaddr *peer) |
| 583 | { |
| 584 | char buf[BUFSIZ1024]; |
| 585 | |
| 586 | l2tpd_log(_this, LOG_ALERT1, "Received packet from %s/udp: " |
| 587 | "%s", addrport_tostring(peer, peer->sa_len, buf, sizeof(buf)), |
| 588 | reason); |
| 589 | } |
| 590 | |
| 591 | /* I/O event handler */ |
| 592 | static void |
| 593 | l2tpd_io_event(int fd, short evtype, void *ctx) |
| 594 | { |
| 595 | int sz; |
| 596 | l2tpd *_l2tpd; |
| 597 | l2tpd_listener *_this; |
| 598 | socklen_t peerlen, socklen; |
| 599 | struct sockaddr_storage peer, sock; |
| 600 | u_char buf[8192]; |
| 601 | void *nat_t; |
| 602 | |
| 603 | _this = ctx; |
| 604 | _l2tpd = _this->self; |
| 605 | if ((evtype & EV_READ0x02) != 0) { |
| 606 | peerlen = sizeof(peer); |
| 607 | socklen = sizeof(sock); |
| 608 | while (!l2tpd_is_stopped(_l2tpd)(((_l2tpd)->state != 2 && (_l2tpd)->state != 1) ? 1 : 0)) { |
| 609 | #if defined(USE_LIBSOCKUTIL) || defined(USE_SA_COOKIE1) |
| 610 | int sa_cookie_len; |
| 611 | struct in_ipsec_sa_cookie sa_cookie; |
| 612 | |
| 613 | sa_cookie_len = sizeof(sa_cookie); |
| 614 | if ((sz = recvfromto_nat_t(_this->sock, buf, |
| 615 | sizeof(buf), 0, |
| 616 | (struct sockaddr *)&peer, &peerlen, |
| 617 | (struct sockaddr *)&sock, &socklen, |
| 618 | &sa_cookie, &sa_cookie_len)) == -1) { |
| 619 | #else |
| 620 | if ((sz = recvfromto(_this->sock, buf, |
| 621 | sizeof(buf), 0, |
| 622 | (struct sockaddr *)&peer, &peerlen, |
| 623 | (struct sockaddr *)&sock, &socklen)) == -1) { |
| 624 | #endif |
| 625 | if (errno(*__errno()) == EAGAIN35 || errno(*__errno()) == EINTR4) |
| 626 | break; |
| 627 | l2tpd_log(_l2tpd, LOG_ERR3, |
| 628 | "recvfrom() failed in %s(): %m", |
| 629 | __func__); |
| 630 | l2tpd_stop(_l2tpd); |
| 631 | return; |
| 632 | } |
| 633 | /* source address check (allows.in) */ |
| 634 | switch (peer.ss_family) { |
| 635 | case AF_INET2: |
| 636 | #if defined(USE_LIBSOCKUTIL) || defined(USE_SA_COOKIE1) |
| 637 | if (sa_cookie_len > 0) |
| 638 | nat_t = &sa_cookie; |
| 639 | else |
| 640 | nat_t = NULL((void *)0); |
| 641 | #else |
| 642 | nat_t = NULL((void *)0); |
| 643 | #endif |
| 644 | l2tp_ctrl_input(_l2tpd, _this->index, |
| 645 | (struct sockaddr *)&peer, |
| 646 | (struct sockaddr *)&sock, nat_t, |
| 647 | buf, sz); |
| 648 | break; |
| 649 | case AF_INET624: |
| 650 | l2tp_ctrl_input(_l2tpd, _this->index, |
| 651 | (struct sockaddr *)&peer, |
| 652 | (struct sockaddr *)&sock, NULL((void *)0), |
| 653 | buf, sz); |
| 654 | break; |
| 655 | default: |
| 656 | l2tpd_log(_l2tpd, LOG_ERR3, |
| 657 | "received from unknown address family = %d", |
| 658 | peer.ss_family); |
| 659 | break; |
| 660 | } |
| 661 | } |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | /* |
| 666 | * L2TP control |
| 667 | */ |
| 668 | l2tp_ctrl * |
| 669 | l2tpd_get_ctrl(l2tpd *_this, unsigned tunid) |
| 670 | { |
| 671 | hash_link *hl; |
| 672 | |
| 673 | hl = hash_lookup(_this->ctrl_map, (void *)(uintptr_t)tunid); |
| 674 | if (hl == NULL((void *)0)) |
| 675 | return NULL((void *)0); |
| 676 | |
| 677 | return hl->item; |
| 678 | } |
| 679 | |
| 680 | void |
| 681 | l2tpd_add_ctrl(l2tpd *_this, l2tp_ctrl *ctrl) |
| 682 | { |
| 683 | hash_insert(_this->ctrl_map, (void *)(uintptr_t)ctrl->tunnel_id, ctrl); |
| 684 | } |
| 685 | |
| 686 | void |
| 687 | l2tpd_remove_ctrl(l2tpd *_this, unsigned tunid) |
| 688 | { |
| 689 | hash_delete(_this->ctrl_map, (void *)(uintptr_t)tunid, 0); |
| 690 | } |
| 691 | |
| 692 | |
| 693 | /* |
| 694 | * misc |
| 695 | */ |
| 696 | |
| 697 | void |
| 698 | l2tpd_log(l2tpd *_this, int prio, const char *fmt, ...) |
| 699 | { |
| 700 | char logbuf[BUFSIZ1024]; |
| 701 | va_list ap; |
| 702 | |
| 703 | va_start(ap, fmt)__builtin_va_start(ap, fmt); |
| 704 | #ifdef L2TPD_MULTIPLE |
| 705 | snprintf(logbuf, sizeof(logbuf), "l2tpd id=%u %s", _this->id, fmt); |
| 706 | #else |
| 707 | snprintf(logbuf, sizeof(logbuf), "l2tpd %s", fmt); |
| 708 | #endif |
| 709 | vlog_printf(prio, logbuf, ap); |
| 710 | va_end(ap)__builtin_va_end(ap); |
| 711 | } |