1*f98352d8Spyr /* $OpenBSD: hce.c,v 1.35 2007/11/21 09:54:39 pyr Exp $ */ 2feb9ff76Sreyk 3feb9ff76Sreyk /* 436f5dc5eSpyr * Copyright (c) 2006 Pierre-Yves Ritschard <pyr@openbsd.org> 5feb9ff76Sreyk * 6feb9ff76Sreyk * Permission to use, copy, modify, and distribute this software for any 7feb9ff76Sreyk * purpose with or without fee is hereby granted, provided that the above 8feb9ff76Sreyk * copyright notice and this permission notice appear in all copies. 9feb9ff76Sreyk * 10feb9ff76Sreyk * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11feb9ff76Sreyk * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12feb9ff76Sreyk * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13feb9ff76Sreyk * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14feb9ff76Sreyk * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15feb9ff76Sreyk * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16feb9ff76Sreyk * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17feb9ff76Sreyk */ 18feb9ff76Sreyk 19feb9ff76Sreyk #include <sys/queue.h> 20feb9ff76Sreyk #include <sys/param.h> 21feb9ff76Sreyk #include <sys/types.h> 22feb9ff76Sreyk #include <sys/time.h> 23feb9ff76Sreyk #include <sys/stat.h> 24feb9ff76Sreyk #include <sys/socket.h> 25feb9ff76Sreyk #include <sys/un.h> 26feb9ff76Sreyk #include <netinet/in_systm.h> 27feb9ff76Sreyk #include <netinet/in.h> 28feb9ff76Sreyk #include <netinet/ip.h> 29feb9ff76Sreyk #include <net/if.h> 30feb9ff76Sreyk #include <errno.h> 31feb9ff76Sreyk #include <event.h> 32feb9ff76Sreyk #include <fcntl.h> 33feb9ff76Sreyk #include <stdlib.h> 34feb9ff76Sreyk #include <string.h> 35feb9ff76Sreyk #include <unistd.h> 36feb9ff76Sreyk #include <err.h> 37feb9ff76Sreyk #include <pwd.h> 38feb9ff76Sreyk 39e8fb3979Spyr #include <openssl/ssl.h> 40e8fb3979Spyr 41ee9f3836Sderaadt #include "hoststated.h" 42feb9ff76Sreyk 43c99a0f3cSblambert __dead void hce_shutdown(void); 44feb9ff76Sreyk void hce_sig_handler(int sig, short, void *); 45feb9ff76Sreyk void hce_dispatch_imsg(int, short, void *); 46feb9ff76Sreyk void hce_dispatch_parent(int, short, void *); 47feb9ff76Sreyk void hce_launch_checks(int, short, void *); 48641b8bafSpyr void hce_setup_events(void); 49641b8bafSpyr void hce_disable_events(void); 50feb9ff76Sreyk 518f79868bSpyr static struct hoststated *env = NULL; 52feb9ff76Sreyk struct imsgbuf *ibuf_pfe; 53feb9ff76Sreyk struct imsgbuf *ibuf_main; 54780e8f79Spyr int pipe_pfe; 55780e8f79Spyr int pipe_parent; 56780e8f79Spyr int running = 0; 57feb9ff76Sreyk 58feb9ff76Sreyk void 59feb9ff76Sreyk hce_sig_handler(int sig, short event, void *arg) 60feb9ff76Sreyk { 61feb9ff76Sreyk switch (sig) { 62feb9ff76Sreyk case SIGINT: 63feb9ff76Sreyk case SIGTERM: 64feb9ff76Sreyk hce_shutdown(); 65780e8f79Spyr break; 66feb9ff76Sreyk default: 67feb9ff76Sreyk fatalx("hce_sig_handler: unexpected signal"); 68feb9ff76Sreyk } 69feb9ff76Sreyk } 70feb9ff76Sreyk 71feb9ff76Sreyk pid_t 728f79868bSpyr hce(struct hoststated *x_env, int pipe_parent2pfe[2], int pipe_parent2hce[2], 73053249cdSpyr int pipe_parent2relay[RELAY_MAXPROC][2], int pipe_pfe2hce[2], 742edd718bSreyk int pipe_pfe2relay[RELAY_MAXPROC][2]) 75feb9ff76Sreyk { 76feb9ff76Sreyk pid_t pid; 77feb9ff76Sreyk struct passwd *pw; 782edd718bSreyk int i; 79641b8bafSpyr struct event ev_sigint; 80641b8bafSpyr struct event ev_sigterm; 81feb9ff76Sreyk 82feb9ff76Sreyk switch (pid = fork()) { 83feb9ff76Sreyk case -1: 84feb9ff76Sreyk fatal("hce: cannot fork"); 85feb9ff76Sreyk case 0: 86feb9ff76Sreyk break; 87feb9ff76Sreyk default: 88feb9ff76Sreyk return (pid); 89feb9ff76Sreyk } 90feb9ff76Sreyk 91feb9ff76Sreyk env = x_env; 9279446c9fSpyr purge_config(env, PURGE_SERVICES|PURGE_RELAYS|PURGE_PROTOS); 93feb9ff76Sreyk 948f79868bSpyr if ((pw = getpwnam(HOSTSTATED_USER)) == NULL) 95feb9ff76Sreyk fatal("hce: getpwnam"); 96feb9ff76Sreyk 97adf98c11Spyr #ifndef DEBUG 98feb9ff76Sreyk if (chroot(pw->pw_dir) == -1) 99feb9ff76Sreyk fatal("hce: chroot"); 100feb9ff76Sreyk if (chdir("/") == -1) 101feb9ff76Sreyk fatal("hce: chdir(\"/\")"); 102adf98c11Spyr #else 103adf98c11Spyr #warning disabling privilege revocation and chroot in DEBUG mode 104adf98c11Spyr #endif 105feb9ff76Sreyk 106feb9ff76Sreyk setproctitle("host check engine"); 1078f79868bSpyr hoststated_process = PROC_HCE; 108feb9ff76Sreyk 10901d85ec5Sreyk /* this is needed for icmp tests */ 11001d85ec5Sreyk icmp_init(env); 11101d85ec5Sreyk 112adf98c11Spyr #ifndef DEBUG 113feb9ff76Sreyk if (setgroups(1, &pw->pw_gid) || 114feb9ff76Sreyk setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) || 115feb9ff76Sreyk setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid)) 116feb9ff76Sreyk fatal("hce: can't drop privileges"); 117adf98c11Spyr #endif 118feb9ff76Sreyk 119641b8bafSpyr event_init(); 120feb9ff76Sreyk 121641b8bafSpyr if ((ibuf_pfe = calloc(1, sizeof(struct imsgbuf))) == NULL || 122641b8bafSpyr (ibuf_main = calloc(1, sizeof(struct imsgbuf))) == NULL) 123641b8bafSpyr fatal("hce"); 124641b8bafSpyr imsg_init(ibuf_pfe, pipe_pfe2hce[0], hce_dispatch_imsg); 125641b8bafSpyr imsg_init(ibuf_main, pipe_parent2hce[1], hce_dispatch_parent); 126641b8bafSpyr 127641b8bafSpyr ibuf_pfe->events = EV_READ; 128641b8bafSpyr event_set(&ibuf_pfe->ev, ibuf_pfe->fd, ibuf_pfe->events, 129641b8bafSpyr ibuf_pfe->handler, ibuf_pfe); 130641b8bafSpyr event_add(&ibuf_pfe->ev, NULL); 131641b8bafSpyr 132641b8bafSpyr ibuf_main->events = EV_READ; 133641b8bafSpyr event_set(&ibuf_main->ev, ibuf_main->fd, ibuf_main->events, 134641b8bafSpyr ibuf_main->handler, ibuf_main); 135641b8bafSpyr event_add(&ibuf_main->ev, NULL); 136641b8bafSpyr 137641b8bafSpyr signal_set(&ev_sigint, SIGINT, hce_sig_handler, NULL); 138641b8bafSpyr signal_set(&ev_sigterm, SIGTERM, hce_sig_handler, NULL); 139641b8bafSpyr signal_add(&ev_sigint, NULL); 140641b8bafSpyr signal_add(&ev_sigterm, NULL); 141641b8bafSpyr signal(SIGPIPE, SIG_IGN); 142fda2844dSpyr signal(SIGHUP, SIG_IGN); 143feb9ff76Sreyk 144feb9ff76Sreyk /* setup pipes */ 145feb9ff76Sreyk close(pipe_pfe2hce[1]); 146feb9ff76Sreyk close(pipe_parent2hce[0]); 147feb9ff76Sreyk close(pipe_parent2pfe[0]); 148feb9ff76Sreyk close(pipe_parent2pfe[1]); 1492edd718bSreyk for (i = 0; i < env->prefork_relay; i++) { 150053249cdSpyr close(pipe_parent2relay[i][0]); 151053249cdSpyr close(pipe_parent2relay[i][1]); 1522edd718bSreyk close(pipe_pfe2relay[i][0]); 1532edd718bSreyk close(pipe_pfe2relay[i][1]); 1542edd718bSreyk } 155feb9ff76Sreyk 156641b8bafSpyr hce_setup_events(); 157641b8bafSpyr event_dispatch(); 158780e8f79Spyr hce_shutdown(); 159780e8f79Spyr 160780e8f79Spyr return (0); 161780e8f79Spyr } 162780e8f79Spyr 163780e8f79Spyr void 164641b8bafSpyr hce_setup_events(void) 165780e8f79Spyr { 166780e8f79Spyr struct timeval tv; 167780e8f79Spyr struct table *table; 168780e8f79Spyr 169780e8f79Spyr if (!TAILQ_EMPTY(env->tables)) { 17001d85ec5Sreyk evtimer_set(&env->ev, hce_launch_checks, env); 17101d85ec5Sreyk bzero(&tv, sizeof(tv)); 172feb9ff76Sreyk evtimer_add(&env->ev, &tv); 1732edd718bSreyk } 174feb9ff76Sreyk 175e8fb3979Spyr if (env->flags & F_SSL) { 176e8fb3979Spyr ssl_init(env); 177780e8f79Spyr TAILQ_FOREACH(table, env->tables, entry) { 17868b79041Spyr if (!(table->conf.flags & F_SSL)) 179e8fb3979Spyr continue; 180e8fb3979Spyr table->ssl_ctx = ssl_ctx_create(env); 181e8fb3979Spyr } 182e8fb3979Spyr } 183641b8bafSpyr } 184641b8bafSpyr 185641b8bafSpyr void 186641b8bafSpyr hce_disable_events(void) 187641b8bafSpyr { 188641b8bafSpyr struct table *table; 189641b8bafSpyr struct host *host; 190641b8bafSpyr 191641b8bafSpyr evtimer_del(&env->ev); 192641b8bafSpyr TAILQ_FOREACH(table, env->tables, entry) { 193641b8bafSpyr TAILQ_FOREACH(host, &table->hosts, entry) { 194641b8bafSpyr event_del(&host->cte.ev); 195641b8bafSpyr close(host->cte.s); 196641b8bafSpyr } 197641b8bafSpyr } 198641b8bafSpyr if (env->has_icmp) { 199641b8bafSpyr event_del(&env->icmp_send.ev); 200641b8bafSpyr event_del(&env->icmp_recv.ev); 201641b8bafSpyr } 202641b8bafSpyr if (env->has_icmp6) { 203641b8bafSpyr event_del(&env->icmp6_send.ev); 204641b8bafSpyr event_del(&env->icmp6_recv.ev); 205641b8bafSpyr } 206feb9ff76Sreyk } 207feb9ff76Sreyk 208feb9ff76Sreyk void 209feb9ff76Sreyk hce_launch_checks(int fd, short event, void *arg) 210feb9ff76Sreyk { 211feb9ff76Sreyk struct host *host; 212feb9ff76Sreyk struct table *table; 21301d85ec5Sreyk struct timeval tv; 21401d85ec5Sreyk 21501d85ec5Sreyk /* 21601d85ec5Sreyk * notify pfe checks are done and schedule next check 21701d85ec5Sreyk */ 2187a0be62eSmsf imsg_compose(ibuf_pfe, IMSG_SYNC, 0, 0, -1, NULL, 0); 219780e8f79Spyr TAILQ_FOREACH(table, env->tables, entry) { 22001d85ec5Sreyk TAILQ_FOREACH(host, &table->hosts, entry) { 22101d85ec5Sreyk host->flags &= ~(F_CHECK_SENT|F_CHECK_DONE); 22201d85ec5Sreyk event_del(&host->cte.ev); 22301d85ec5Sreyk } 22401d85ec5Sreyk } 22501d85ec5Sreyk 22601d85ec5Sreyk if (gettimeofday(&tv, NULL)) 22701d85ec5Sreyk fatal("hce_launch_checks: gettimeofday"); 228feb9ff76Sreyk 229780e8f79Spyr TAILQ_FOREACH(table, env->tables, entry) { 23068b79041Spyr if (table->conf.flags & F_DISABLE) 2317e351ffdSreyk continue; 23218de159aSpyr if (table->conf.skip_cnt) { 23318de159aSpyr if (table->skipped++ > table->conf.skip_cnt) 23418de159aSpyr table->skipped = 0; 23518de159aSpyr if (table->skipped != 1) 23618de159aSpyr continue; 23718de159aSpyr } 23868b79041Spyr if (table->conf.check == CHECK_NOCHECK) 2397e351ffdSreyk fatalx("hce_launch_checks: unknown check type"); 24001d85ec5Sreyk 2417e351ffdSreyk TAILQ_FOREACH(host, &table->hosts, entry) { 2427e351ffdSreyk if (host->flags & F_DISABLE) 2437e351ffdSreyk continue; 2444156152fSreyk switch (table->conf.check) { 2454156152fSreyk case CHECK_ICMP: 24601d85ec5Sreyk schedule_icmp(env, host); 2474156152fSreyk break; 2484156152fSreyk case CHECK_SCRIPT: 2494156152fSreyk check_script(host); 2504156152fSreyk break; 2514156152fSreyk default: 25201d85ec5Sreyk /* Any other TCP-style checks */ 2537e351ffdSreyk bzero(&host->cte, sizeof(host->cte)); 2547e351ffdSreyk host->last_up = host->up; 2557e351ffdSreyk host->cte.host = host; 2567e351ffdSreyk host->cte.table = table; 25701d85ec5Sreyk bcopy(&tv, &host->cte.tv_start, 25801d85ec5Sreyk sizeof(host->cte.tv_start)); 2597e351ffdSreyk check_tcp(&host->cte); 2604156152fSreyk break; 2614156152fSreyk } 2627e351ffdSreyk } 2637e351ffdSreyk } 26401d85ec5Sreyk check_icmp(env, &tv); 26501d85ec5Sreyk 26601d85ec5Sreyk bcopy(&env->interval, &tv, sizeof(tv)); 26701d85ec5Sreyk evtimer_add(&env->ev, &tv); 2687e351ffdSreyk } 2697e351ffdSreyk 2707e351ffdSreyk void 2717e351ffdSreyk hce_notify_done(struct host *host, const char *msg) 2727e351ffdSreyk { 273609cf3a7Sreyk struct table *table; 2747e351ffdSreyk struct ctl_status st; 275609cf3a7Sreyk struct timeval tv_now, tv_dur; 276609cf3a7Sreyk u_long duration; 277609cf3a7Sreyk u_int logopt; 2787e351ffdSreyk 2792edd718bSreyk if (host->up == HOST_DOWN && host->retry_cnt) { 2802edd718bSreyk log_debug("hce_notify_done: host %s retry %d", 28168b79041Spyr host->conf.name, host->retry_cnt); 282bd2508bcSreyk host->up = host->last_up; 2832edd718bSreyk host->retry_cnt--; 2842edd718bSreyk } else 28568b79041Spyr host->retry_cnt = host->conf.retry; 2862edd718bSreyk if (host->up != HOST_UNKNOWN) { 2872edd718bSreyk host->check_cnt++; 2882edd718bSreyk if (host->up == HOST_UP) 2892edd718bSreyk host->up_cnt++; 2902edd718bSreyk } 29168b79041Spyr st.id = host->conf.id; 292feb9ff76Sreyk st.up = host->up; 2932edd718bSreyk st.check_cnt = host->check_cnt; 2942edd718bSreyk st.retry_cnt = host->retry_cnt; 29501d85ec5Sreyk host->flags |= (F_CHECK_SENT|F_CHECK_DONE); 2967e351ffdSreyk if (msg) 29768b79041Spyr log_debug("hce_notify_done: %s (%s)", host->conf.name, msg); 298609cf3a7Sreyk 2997a0be62eSmsf imsg_compose(ibuf_pfe, IMSG_HOST_STATUS, 0, 0, -1, &st, sizeof(st)); 3002edd718bSreyk if (host->up != host->last_up) 3012edd718bSreyk logopt = HOSTSTATED_OPT_LOGUPDATE; 3022edd718bSreyk else 303609cf3a7Sreyk logopt = HOSTSTATED_OPT_LOGNOTIFY; 304609cf3a7Sreyk 305609cf3a7Sreyk if (gettimeofday(&tv_now, NULL)) 306609cf3a7Sreyk fatal("hce_notify_done: gettimeofday"); 307609cf3a7Sreyk timersub(&tv_now, &host->cte.tv_start, &tv_dur); 308609cf3a7Sreyk if (timercmp(&host->cte.tv_start, &tv_dur, >)) 309609cf3a7Sreyk duration = (tv_dur.tv_sec * 1000) + (tv_dur.tv_usec / 1000.0); 310609cf3a7Sreyk else 311609cf3a7Sreyk duration = 0; 312609cf3a7Sreyk 31368b79041Spyr if ((table = table_find(env, host->conf.tableid)) == NULL) 3142edd718bSreyk fatalx("hce_notify_done: invalid table id"); 3152edd718bSreyk 316609cf3a7Sreyk if (env->opts & logopt) { 3172edd718bSreyk log_info("host %s, check %s%s (%lums), state %s -> %s, " 3182edd718bSreyk "availability %s", 31968b79041Spyr host->conf.name, table_check(table->conf.check), 32068b79041Spyr (table->conf.flags & F_SSL) ? " use ssl" : "", duration, 3212edd718bSreyk host_status(host->last_up), host_status(host->up), 3222edd718bSreyk print_availability(host->check_cnt, host->up_cnt)); 323feb9ff76Sreyk } 324609cf3a7Sreyk host->last_up = host->up; 325feb9ff76Sreyk } 326feb9ff76Sreyk 327feb9ff76Sreyk void 328feb9ff76Sreyk hce_shutdown(void) 329feb9ff76Sreyk { 330feb9ff76Sreyk log_info("host check engine exiting"); 331feb9ff76Sreyk _exit(0); 332feb9ff76Sreyk } 333feb9ff76Sreyk 334feb9ff76Sreyk void 335feb9ff76Sreyk hce_dispatch_imsg(int fd, short event, void *ptr) 336feb9ff76Sreyk { 337feb9ff76Sreyk struct imsgbuf *ibuf; 338feb9ff76Sreyk struct imsg imsg; 339feb9ff76Sreyk ssize_t n; 340feb9ff76Sreyk objid_t id; 341feb9ff76Sreyk struct host *host; 342feb9ff76Sreyk struct table *table; 343feb9ff76Sreyk 344feb9ff76Sreyk ibuf = ptr; 345feb9ff76Sreyk switch (event) { 346feb9ff76Sreyk case EV_READ: 347feb9ff76Sreyk if ((n = imsg_read(ibuf)) == -1) 348feb9ff76Sreyk fatal("hce_dispatch_imsg: imsg_read_error"); 349ddfd9103Spyr if (n == 0) { 350ddfd9103Spyr /* this pipe is dead, so remove the event handler */ 351ddfd9103Spyr event_del(&ibuf->ev); 352ddfd9103Spyr event_loopexit(NULL); 353ddfd9103Spyr return; 354ddfd9103Spyr } 355feb9ff76Sreyk break; 356feb9ff76Sreyk case EV_WRITE: 357feb9ff76Sreyk if (msgbuf_write(&ibuf->w) == -1) 358feb9ff76Sreyk fatal("hce_dispatch_imsg: msgbuf_write"); 359feb9ff76Sreyk imsg_event_add(ibuf); 360feb9ff76Sreyk return; 361feb9ff76Sreyk default: 362feb9ff76Sreyk fatalx("hce_dispatch_imsg: unknown event"); 363feb9ff76Sreyk } 364feb9ff76Sreyk 365feb9ff76Sreyk for (;;) { 366feb9ff76Sreyk if ((n = imsg_get(ibuf, &imsg)) == -1) 367feb9ff76Sreyk fatal("hce_dispatch_imsg: imsg_read error"); 368feb9ff76Sreyk if (n == 0) 369feb9ff76Sreyk break; 370feb9ff76Sreyk 371feb9ff76Sreyk switch (imsg.hdr.type) { 372feb9ff76Sreyk case IMSG_HOST_DISABLE: 373feb9ff76Sreyk memcpy(&id, imsg.data, sizeof(id)); 374feb9ff76Sreyk if ((host = host_find(env, id)) == NULL) 375feb9ff76Sreyk fatalx("hce_dispatch_imsg: desynchronized"); 376feb9ff76Sreyk host->flags |= F_DISABLE; 377feb9ff76Sreyk host->up = HOST_UNKNOWN; 3782edd718bSreyk host->check_cnt = 0; 3792edd718bSreyk host->up_cnt = 0; 380feb9ff76Sreyk break; 381feb9ff76Sreyk case IMSG_HOST_ENABLE: 382feb9ff76Sreyk memcpy(&id, imsg.data, sizeof(id)); 383feb9ff76Sreyk if ((host = host_find(env, id)) == NULL) 384feb9ff76Sreyk fatalx("hce_dispatch_imsg: desynchronized"); 385feb9ff76Sreyk host->flags &= ~(F_DISABLE); 386feb9ff76Sreyk host->up = HOST_UNKNOWN; 387feb9ff76Sreyk break; 388feb9ff76Sreyk case IMSG_TABLE_DISABLE: 389feb9ff76Sreyk memcpy(&id, imsg.data, sizeof(id)); 390feb9ff76Sreyk if ((table = table_find(env, id)) == NULL) 391feb9ff76Sreyk fatalx("hce_dispatch_imsg: desynchronized"); 39268b79041Spyr table->conf.flags |= F_DISABLE; 393feb9ff76Sreyk TAILQ_FOREACH(host, &table->hosts, entry) 394feb9ff76Sreyk host->up = HOST_UNKNOWN; 395feb9ff76Sreyk break; 396feb9ff76Sreyk case IMSG_TABLE_ENABLE: 397feb9ff76Sreyk memcpy(&id, imsg.data, sizeof(id)); 398feb9ff76Sreyk if ((table = table_find(env, id)) == NULL) 399feb9ff76Sreyk fatalx("hce_dispatch_imsg: desynchronized"); 40068b79041Spyr table->conf.flags &= ~(F_DISABLE); 401feb9ff76Sreyk TAILQ_FOREACH(host, &table->hosts, entry) 402feb9ff76Sreyk host->up = HOST_UNKNOWN; 403feb9ff76Sreyk break; 404cd65ce7bSpyr case IMSG_CTL_POLL: 405cd65ce7bSpyr evtimer_del(&env->ev); 406*f98352d8Spyr TAILQ_FOREACH(table, env->tables, entry) 407*f98352d8Spyr table->skipped = 0; 408cd65ce7bSpyr hce_launch_checks(-1, EV_TIMEOUT, env); 409cd65ce7bSpyr break; 410feb9ff76Sreyk default: 411feb9ff76Sreyk log_debug("hce_dispatch_msg: unexpected imsg %d", 412feb9ff76Sreyk imsg.hdr.type); 413feb9ff76Sreyk break; 414feb9ff76Sreyk } 415feb9ff76Sreyk imsg_free(&imsg); 416feb9ff76Sreyk } 417feb9ff76Sreyk imsg_event_add(ibuf); 418feb9ff76Sreyk } 419feb9ff76Sreyk 420feb9ff76Sreyk void 421feb9ff76Sreyk hce_dispatch_parent(int fd, short event, void * ptr) 422feb9ff76Sreyk { 423feb9ff76Sreyk struct imsgbuf *ibuf; 424feb9ff76Sreyk struct imsg imsg; 4254156152fSreyk struct ctl_script scr; 426feb9ff76Sreyk ssize_t n; 427adf98c11Spyr size_t len; 428adf98c11Spyr 429adf98c11Spyr static struct table *table = NULL; 430adf98c11Spyr struct host *host; 431feb9ff76Sreyk 432feb9ff76Sreyk ibuf = ptr; 433feb9ff76Sreyk switch (event) { 434feb9ff76Sreyk case EV_READ: 435feb9ff76Sreyk if ((n = imsg_read(ibuf)) == -1) 436feb9ff76Sreyk fatal("hce_dispatch_parent: imsg_read error"); 437ddfd9103Spyr if (n == 0) { 438ddfd9103Spyr /* this pipe is dead, so remove the event handler */ 439ddfd9103Spyr event_del(&ibuf->ev); 440ddfd9103Spyr event_loopexit(NULL); 441ddfd9103Spyr return; 442ddfd9103Spyr } 443feb9ff76Sreyk break; 444feb9ff76Sreyk case EV_WRITE: 445feb9ff76Sreyk if (msgbuf_write(&ibuf->w) == -1) 446feb9ff76Sreyk fatal("hce_dispatch_parent: msgbuf_write"); 447feb9ff76Sreyk imsg_event_add(ibuf); 448feb9ff76Sreyk return; 449feb9ff76Sreyk default: 450feb9ff76Sreyk fatalx("hce_dispatch_parent: unknown event"); 451feb9ff76Sreyk } 452feb9ff76Sreyk 453feb9ff76Sreyk for (;;) { 454feb9ff76Sreyk if ((n = imsg_get(ibuf, &imsg)) == -1) 455feb9ff76Sreyk fatal("hce_dispatch_parent: imsg_read error"); 456feb9ff76Sreyk if (n == 0) 457feb9ff76Sreyk break; 458feb9ff76Sreyk 459feb9ff76Sreyk switch (imsg.hdr.type) { 4604156152fSreyk case IMSG_SCRIPT: 4614156152fSreyk if (imsg.hdr.len - IMSG_HEADER_SIZE != 4624156152fSreyk sizeof(scr)) 4634156152fSreyk fatalx("hce_dispatch_parent: " 4644156152fSreyk "invalid size of script request"); 4654156152fSreyk bcopy(imsg.data, &scr, sizeof(scr)); 4664156152fSreyk script_done(env, &scr); 4674156152fSreyk break; 468adf98c11Spyr case IMSG_RECONF: 469adf98c11Spyr log_debug("hce: reloading configuration"); 470adf98c11Spyr if (imsg.hdr.len != 471adf98c11Spyr sizeof(struct hoststated) + IMSG_HEADER_SIZE) 472adf98c11Spyr fatalx("corrupted reload data"); 473adf98c11Spyr hce_disable_events(); 474adf98c11Spyr purge_config(env, PURGE_TABLES); 475adf98c11Spyr merge_config(env, (struct hoststated *)imsg.data); 476adf98c11Spyr 477adf98c11Spyr env->tables = calloc(1, sizeof(*env->tables)); 478adf98c11Spyr if (env->tables == NULL) 479adf98c11Spyr fatal(NULL); 480adf98c11Spyr 481adf98c11Spyr TAILQ_INIT(env->tables); 482adf98c11Spyr break; 483adf98c11Spyr case IMSG_RECONF_TABLE: 484adf98c11Spyr if ((table = calloc(1, sizeof(*table))) == NULL) 485adf98c11Spyr fatal(NULL); 486adf98c11Spyr memcpy(&table->conf, imsg.data, sizeof(table->conf)); 487adf98c11Spyr TAILQ_INIT(&table->hosts); 488adf98c11Spyr TAILQ_INSERT_TAIL(env->tables, table, entry); 489adf98c11Spyr break; 490adf98c11Spyr case IMSG_RECONF_SENDBUF: 491adf98c11Spyr len = imsg.hdr.len - IMSG_HEADER_SIZE; 492adf98c11Spyr table->sendbuf = calloc(1, len); 493adf98c11Spyr (void)strlcpy(table->sendbuf, (char *)imsg.data, len); 494adf98c11Spyr break; 495adf98c11Spyr case IMSG_RECONF_HOST: 496adf98c11Spyr if ((host = calloc(1, sizeof(*host))) == NULL) 497adf98c11Spyr fatal(NULL); 498adf98c11Spyr memcpy(&host->conf, imsg.data, sizeof(host->conf)); 499adf98c11Spyr host->tablename = table->conf.name; 500adf98c11Spyr TAILQ_INSERT_TAIL(&table->hosts, host, entry); 501adf98c11Spyr break; 502adf98c11Spyr case IMSG_RECONF_END: 503adf98c11Spyr log_warnx("hce: configuration reloaded"); 504adf98c11Spyr hce_setup_events(); 505adf98c11Spyr break; 506feb9ff76Sreyk default: 507feb9ff76Sreyk log_debug("hce_dispatch_parent: unexpected imsg %d", 508feb9ff76Sreyk imsg.hdr.type); 509feb9ff76Sreyk break; 510feb9ff76Sreyk } 511feb9ff76Sreyk imsg_free(&imsg); 512feb9ff76Sreyk } 5134156152fSreyk imsg_event_add(ibuf); 514feb9ff76Sreyk } 515