862 lines
20 KiB
C
862 lines
20 KiB
C
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/* $OpenBSD: rad.c,v 1.29 2023/04/19 12:58:16 jsg Exp $ */
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/*
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* Copyright (c) 2018 Florian Obser <florian@openbsd.org>
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* Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
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* Copyright (c) 2004 Esben Norby <norby@openbsd.org>
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* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/syslog.h>
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#include <sys/uio.h>
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#include <sys/wait.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/if_ether.h>
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#include <netinet6/in6_var.h>
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#include <netinet/icmp6.h>
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#include <err.h>
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#include <errno.h>
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#include <event.h>
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#include <fcntl.h>
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#include <imsg.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include <unistd.h>
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#include "log.h"
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#include "rad.h"
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#include "frontend.h"
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#include "engine.h"
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#include "control.h"
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enum rad_process {
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PROC_MAIN,
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PROC_ENGINE,
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PROC_FRONTEND
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};
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__dead void usage(void);
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__dead void main_shutdown(void);
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void main_sig_handler(int, short, void *);
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static pid_t start_child(enum rad_process, char *, int, int, int);
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void main_dispatch_frontend(int, short, void *);
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void main_dispatch_engine(int, short, void *);
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void open_icmp6sock(int);
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static int main_imsg_send_ipc_sockets(struct imsgbuf *, struct imsgbuf *);
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static int main_imsg_send_config(struct rad_conf *);
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int main_reload(void);
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int main_sendboth(enum imsg_type, void *, uint16_t);
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void in6_prefixlen2mask(struct in6_addr *, int len);
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struct rad_conf *main_conf;
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static struct imsgev *iev_frontend;
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static struct imsgev *iev_engine;
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char *conffile;
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pid_t frontend_pid;
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pid_t engine_pid;
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uint32_t cmd_opts;
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void
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main_sig_handler(int sig, short event, void *arg)
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{
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/*
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* Normal signal handler rules don't apply because libevent
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* decouples for us.
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*/
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switch (sig) {
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case SIGTERM:
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case SIGINT:
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main_shutdown();
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break;
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case SIGHUP:
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if (main_reload() == -1)
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log_warnx("configuration reload failed");
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else
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log_debug("configuration reloaded");
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break;
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default:
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fatalx("unexpected signal");
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}
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}
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__dead void
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usage(void)
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{
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extern char *__progname;
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fprintf(stderr, "usage: %s [-dnv] [-f file] [-s socket]\n",
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__progname);
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exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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struct event ev_sigint, ev_sigterm, ev_sighup;
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int ch;
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int debug = 0, engine_flag = 0, frontend_flag = 0;
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char *saved_argv0;
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int pipe_main2frontend[2];
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int pipe_main2engine[2];
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int frontend_routesock, rtfilter;
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int rtable_any = RTABLE_ANY;
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int control_fd;
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char *csock;
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conffile = _PATH_CONF_FILE;
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csock = _PATH_RAD_SOCKET;
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log_init(1, LOG_DAEMON); /* Log to stderr until daemonized. */
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log_setverbose(1);
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saved_argv0 = argv[0];
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if (saved_argv0 == NULL)
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saved_argv0 = "rad";
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while ((ch = getopt(argc, argv, "dEFf:ns:v")) != -1) {
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switch (ch) {
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case 'd':
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debug = 1;
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break;
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case 'E':
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engine_flag = 1;
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break;
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case 'F':
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frontend_flag = 1;
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break;
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case 'f':
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conffile = optarg;
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break;
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case 'n':
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cmd_opts |= OPT_NOACTION;
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break;
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case 's':
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csock = optarg;
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break;
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case 'v':
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if (cmd_opts & OPT_VERBOSE)
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cmd_opts |= OPT_VERBOSE2;
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cmd_opts |= OPT_VERBOSE;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc > 0 || (engine_flag && frontend_flag))
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usage();
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if (engine_flag)
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engine(debug, cmd_opts & OPT_VERBOSE);
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else if (frontend_flag)
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frontend(debug, cmd_opts & OPT_VERBOSE);
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/* parse config file */
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if ((main_conf = parse_config(conffile)) == NULL) {
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exit(1);
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}
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if (cmd_opts & OPT_NOACTION) {
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if (cmd_opts & OPT_VERBOSE)
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print_config(main_conf);
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else
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fprintf(stderr, "configuration OK\n");
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exit(0);
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}
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/* Check for root privileges. */
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if (geteuid())
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errx(1, "need root privileges");
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/* Check for assigned daemon user */
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if (getpwnam(RAD_USER) == NULL)
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errx(1, "unknown user %s", RAD_USER);
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log_init(debug, LOG_DAEMON);
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log_setverbose(cmd_opts & OPT_VERBOSE);
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if (!debug)
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daemon(1, 0);
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log_info("startup");
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if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
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PF_UNSPEC, pipe_main2frontend) == -1)
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fatal("main2frontend socketpair");
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if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
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PF_UNSPEC, pipe_main2engine) == -1)
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fatal("main2engine socketpair");
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/* Start children. */
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engine_pid = start_child(PROC_ENGINE, saved_argv0, pipe_main2engine[1],
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debug, cmd_opts & OPT_VERBOSE);
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frontend_pid = start_child(PROC_FRONTEND, saved_argv0,
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pipe_main2frontend[1], debug, cmd_opts & OPT_VERBOSE);
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log_procinit("main");
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event_init();
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/* Setup signal handler. */
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signal_set(&ev_sigint, SIGINT, main_sig_handler, NULL);
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signal_set(&ev_sigterm, SIGTERM, main_sig_handler, NULL);
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signal_set(&ev_sighup, SIGHUP, main_sig_handler, NULL);
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signal_add(&ev_sigint, NULL);
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signal_add(&ev_sigterm, NULL);
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signal_add(&ev_sighup, NULL);
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signal(SIGPIPE, SIG_IGN);
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/* Setup pipes to children. */
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if ((iev_frontend = malloc(sizeof(struct imsgev))) == NULL ||
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(iev_engine = malloc(sizeof(struct imsgev))) == NULL)
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fatal(NULL);
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imsg_init(&iev_frontend->ibuf, pipe_main2frontend[0]);
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iev_frontend->handler = main_dispatch_frontend;
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imsg_init(&iev_engine->ibuf, pipe_main2engine[0]);
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iev_engine->handler = main_dispatch_engine;
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/* Setup event handlers for pipes to engine & frontend. */
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iev_frontend->events = EV_READ;
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event_set(&iev_frontend->ev, iev_frontend->ibuf.fd,
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iev_frontend->events, iev_frontend->handler, iev_frontend);
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event_add(&iev_frontend->ev, NULL);
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iev_engine->events = EV_READ;
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event_set(&iev_engine->ev, iev_engine->ibuf.fd, iev_engine->events,
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iev_engine->handler, iev_engine);
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event_add(&iev_engine->ev, NULL);
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if (main_imsg_send_ipc_sockets(&iev_frontend->ibuf, &iev_engine->ibuf))
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fatal("could not establish imsg links");
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if ((frontend_routesock = socket(AF_ROUTE, SOCK_RAW | SOCK_CLOEXEC,
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AF_INET6)) == -1)
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fatal("route socket");
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rtfilter = ROUTE_FILTER(RTM_IFINFO) | ROUTE_FILTER(RTM_NEWADDR) |
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ROUTE_FILTER(RTM_DELADDR) | ROUTE_FILTER(RTM_CHGADDRATTR);
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if (setsockopt(frontend_routesock, AF_ROUTE, ROUTE_MSGFILTER,
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&rtfilter, sizeof(rtfilter)) == -1)
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fatal("setsockopt(ROUTE_MSGFILTER)");
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if (setsockopt(frontend_routesock, AF_ROUTE, ROUTE_TABLEFILTER,
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&rtable_any, sizeof(rtable_any)) == -1)
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fatal("setsockopt(ROUTE_TABLEFILTER)");
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if ((control_fd = control_init(csock)) == -1)
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fatalx("control socket setup failed");
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main_imsg_compose_frontend(IMSG_ROUTESOCK, frontend_routesock,
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NULL, 0);
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main_imsg_compose_frontend(IMSG_CONTROLFD, control_fd, NULL, 0);
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main_imsg_send_config(main_conf);
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if (pledge("stdio inet rpath sendfd mcast wroute", NULL) == -1)
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fatal("pledge");
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main_imsg_compose_frontend(IMSG_STARTUP, -1, NULL, 0);
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event_dispatch();
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main_shutdown();
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return (0);
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}
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__dead void
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main_shutdown(void)
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{
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pid_t pid;
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int status;
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/* Close pipes. */
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msgbuf_clear(&iev_frontend->ibuf.w);
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close(iev_frontend->ibuf.fd);
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msgbuf_clear(&iev_engine->ibuf.w);
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close(iev_engine->ibuf.fd);
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config_clear(main_conf);
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log_debug("waiting for children to terminate");
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do {
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pid = wait(&status);
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if (pid == -1) {
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if (errno != EINTR && errno != ECHILD)
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fatal("wait");
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} else if (WIFSIGNALED(status))
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log_warnx("%s terminated; signal %d",
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(pid == engine_pid) ? "engine" :
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"frontend", WTERMSIG(status));
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} while (pid != -1 || (pid == -1 && errno == EINTR));
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free(iev_frontend);
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free(iev_engine);
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log_info("terminating");
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exit(0);
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}
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static pid_t
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start_child(enum rad_process p, char *argv0, int fd, int debug, int verbose)
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{
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char *argv[6];
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int argc = 0;
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pid_t pid;
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switch (pid = fork()) {
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case -1:
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fatal("cannot fork");
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case 0:
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break;
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default:
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close(fd);
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return (pid);
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}
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if (fd != 3) {
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if (dup2(fd, 3) == -1)
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fatal("cannot setup imsg fd");
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} else if (fcntl(fd, F_SETFD, 0) == -1)
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fatal("cannot setup imsg fd");
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argv[argc++] = argv0;
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switch (p) {
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case PROC_MAIN:
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fatalx("Can not start main process");
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case PROC_ENGINE:
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argv[argc++] = "-E";
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break;
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case PROC_FRONTEND:
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argv[argc++] = "-F";
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break;
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}
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if (debug)
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argv[argc++] = "-d";
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if (verbose)
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argv[argc++] = "-v";
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argv[argc++] = NULL;
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execvp(argv0, argv);
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fatal("execvp");
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}
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void
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main_dispatch_frontend(int fd, short event, void *bula)
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{
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struct imsgev *iev = bula;
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struct imsgbuf *ibuf;
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struct imsg imsg;
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ssize_t n;
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int shut = 0, verbose;
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int rdomain;
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ibuf = &iev->ibuf;
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if (event & EV_READ) {
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if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
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fatal("imsg_read error");
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if (n == 0) /* Connection closed. */
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shut = 1;
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}
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if (event & EV_WRITE) {
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if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
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fatal("msgbuf_write");
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if (n == 0) /* Connection closed. */
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shut = 1;
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}
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for (;;) {
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if ((n = imsg_get(ibuf, &imsg)) == -1)
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fatal("imsg_get");
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if (n == 0) /* No more messages. */
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break;
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switch (imsg.hdr.type) {
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case IMSG_OPEN_ICMP6SOCK:
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log_debug("IMSG_OPEN_ICMP6SOCK");
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if (IMSG_DATA_SIZE(imsg) != sizeof(rdomain))
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fatalx("%s: IMSG_OPEN_ICMP6SOCK wrong length: "
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"%lu", __func__, IMSG_DATA_SIZE(imsg));
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memcpy(&rdomain, imsg.data, sizeof(rdomain));
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open_icmp6sock(rdomain);
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break;
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case IMSG_CTL_RELOAD:
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if (main_reload() == -1)
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log_warnx("configuration reload failed");
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else
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log_warnx("configuration reloaded");
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break;
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case IMSG_CTL_LOG_VERBOSE:
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if (IMSG_DATA_SIZE(imsg) != sizeof(verbose))
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fatalx("%s: IMSG_CTL_LOG_VERBOSE wrong length: "
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"%lu", __func__, IMSG_DATA_SIZE(imsg));
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memcpy(&verbose, imsg.data, sizeof(verbose));
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log_setverbose(verbose);
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break;
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default:
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log_debug("%s: error handling imsg %d", __func__,
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imsg.hdr.type);
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break;
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}
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imsg_free(&imsg);
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}
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if (!shut)
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imsg_event_add(iev);
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else {
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/* This pipe is dead. Remove its event handler */
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|
event_del(&iev->ev);
|
||
|
event_loopexit(NULL);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void
|
||
|
main_dispatch_engine(int fd, short event, void *bula)
|
||
|
{
|
||
|
struct imsgev *iev = bula;
|
||
|
struct imsgbuf *ibuf;
|
||
|
struct imsg imsg;
|
||
|
ssize_t n;
|
||
|
int shut = 0;
|
||
|
|
||
|
ibuf = &iev->ibuf;
|
||
|
|
||
|
if (event & EV_READ) {
|
||
|
if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
|
||
|
fatal("imsg_read error");
|
||
|
if (n == 0) /* Connection closed. */
|
||
|
shut = 1;
|
||
|
}
|
||
|
if (event & EV_WRITE) {
|
||
|
if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
|
||
|
fatal("msgbuf_write");
|
||
|
if (n == 0) /* Connection closed. */
|
||
|
shut = 1;
|
||
|
}
|
||
|
|
||
|
for (;;) {
|
||
|
if ((n = imsg_get(ibuf, &imsg)) == -1)
|
||
|
fatal("imsg_get");
|
||
|
if (n == 0) /* No more messages. */
|
||
|
break;
|
||
|
|
||
|
switch (imsg.hdr.type) {
|
||
|
default:
|
||
|
log_debug("%s: error handling imsg %d", __func__,
|
||
|
imsg.hdr.type);
|
||
|
break;
|
||
|
}
|
||
|
imsg_free(&imsg);
|
||
|
}
|
||
|
if (!shut)
|
||
|
imsg_event_add(iev);
|
||
|
else {
|
||
|
/* This pipe is dead. Remove its event handler. */
|
||
|
event_del(&iev->ev);
|
||
|
event_loopexit(NULL);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
int
|
||
|
main_imsg_compose_frontend(int type, int fd, void *data, uint16_t datalen)
|
||
|
{
|
||
|
if (iev_frontend)
|
||
|
return (imsg_compose_event(iev_frontend, type, 0, 0, fd, data,
|
||
|
datalen));
|
||
|
else
|
||
|
return (-1);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
main_imsg_compose_engine(int type, pid_t pid, void *data, uint16_t datalen)
|
||
|
{
|
||
|
if (iev_engine)
|
||
|
imsg_compose_event(iev_engine, type, 0, pid, -1, data,
|
||
|
datalen);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
imsg_event_add(struct imsgev *iev)
|
||
|
{
|
||
|
iev->events = EV_READ;
|
||
|
if (iev->ibuf.w.queued)
|
||
|
iev->events |= EV_WRITE;
|
||
|
|
||
|
event_del(&iev->ev);
|
||
|
event_set(&iev->ev, iev->ibuf.fd, iev->events, iev->handler, iev);
|
||
|
event_add(&iev->ev, NULL);
|
||
|
}
|
||
|
|
||
|
int
|
||
|
imsg_compose_event(struct imsgev *iev, uint16_t type, uint32_t peerid,
|
||
|
pid_t pid, int fd, void *data, uint16_t datalen)
|
||
|
{
|
||
|
int ret;
|
||
|
|
||
|
if ((ret = imsg_compose(&iev->ibuf, type, peerid, pid, fd, data,
|
||
|
datalen)) != -1)
|
||
|
imsg_event_add(iev);
|
||
|
|
||
|
return (ret);
|
||
|
}
|
||
|
|
||
|
static int
|
||
|
main_imsg_send_ipc_sockets(struct imsgbuf *frontend_buf,
|
||
|
struct imsgbuf *engine_buf)
|
||
|
{
|
||
|
int pipe_frontend2engine[2];
|
||
|
|
||
|
if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
|
||
|
PF_UNSPEC, pipe_frontend2engine) == -1)
|
||
|
return (-1);
|
||
|
|
||
|
if (imsg_compose(frontend_buf, IMSG_SOCKET_IPC, 0, 0,
|
||
|
pipe_frontend2engine[0], NULL, 0) == -1)
|
||
|
return (-1);
|
||
|
if (imsg_compose(engine_buf, IMSG_SOCKET_IPC, 0, 0,
|
||
|
pipe_frontend2engine[1], NULL, 0) == -1)
|
||
|
return (-1);
|
||
|
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
int
|
||
|
main_reload(void)
|
||
|
{
|
||
|
struct rad_conf *xconf;
|
||
|
|
||
|
if ((xconf = parse_config(conffile)) == NULL)
|
||
|
return (-1);
|
||
|
|
||
|
if (main_imsg_send_config(xconf) == -1)
|
||
|
return (-1);
|
||
|
|
||
|
merge_config(main_conf, xconf);
|
||
|
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
int
|
||
|
main_imsg_send_config(struct rad_conf *xconf)
|
||
|
{
|
||
|
struct ra_iface_conf *ra_iface_conf;
|
||
|
struct ra_prefix_conf *ra_prefix_conf;
|
||
|
struct ra_rdnss_conf *ra_rdnss_conf;
|
||
|
struct ra_dnssl_conf *ra_dnssl_conf;
|
||
|
struct ra_pref64_conf *pref64;
|
||
|
|
||
|
/* Send fixed part of config to children. */
|
||
|
if (main_sendboth(IMSG_RECONF_CONF, xconf, sizeof(*xconf)) == -1)
|
||
|
return (-1);
|
||
|
|
||
|
/* send global dns options to children */
|
||
|
SIMPLEQ_FOREACH(ra_rdnss_conf, &xconf->ra_options.ra_rdnss_list,
|
||
|
entry) {
|
||
|
if (main_sendboth(IMSG_RECONF_RA_RDNSS, ra_rdnss_conf,
|
||
|
sizeof(*ra_rdnss_conf)) == -1)
|
||
|
return (-1);
|
||
|
}
|
||
|
SIMPLEQ_FOREACH(ra_dnssl_conf, &xconf->ra_options.ra_dnssl_list,
|
||
|
entry) {
|
||
|
if (main_sendboth(IMSG_RECONF_RA_DNSSL, ra_dnssl_conf,
|
||
|
sizeof(*ra_dnssl_conf)) == -1)
|
||
|
return (-1);
|
||
|
}
|
||
|
|
||
|
/* send global pref64 list to children */
|
||
|
SIMPLEQ_FOREACH(pref64, &xconf->ra_options.ra_pref64_list,
|
||
|
entry) {
|
||
|
if (main_sendboth(IMSG_RECONF_RA_PREF64, pref64,
|
||
|
sizeof(*pref64)) == -1)
|
||
|
return (-1);
|
||
|
}
|
||
|
|
||
|
/* Send the interface list to children. */
|
||
|
SIMPLEQ_FOREACH(ra_iface_conf, &xconf->ra_iface_list, entry) {
|
||
|
if (main_sendboth(IMSG_RECONF_RA_IFACE, ra_iface_conf,
|
||
|
sizeof(*ra_iface_conf)) == -1)
|
||
|
return (-1);
|
||
|
if (ra_iface_conf->autoprefix) {
|
||
|
if (main_sendboth(IMSG_RECONF_RA_AUTOPREFIX,
|
||
|
ra_iface_conf->autoprefix,
|
||
|
sizeof(*ra_iface_conf->autoprefix)) == -1)
|
||
|
return (-1);
|
||
|
}
|
||
|
SIMPLEQ_FOREACH(ra_prefix_conf, &ra_iface_conf->ra_prefix_list,
|
||
|
entry) {
|
||
|
if (main_sendboth(IMSG_RECONF_RA_PREFIX,
|
||
|
ra_prefix_conf, sizeof(*ra_prefix_conf)) == -1)
|
||
|
return (-1);
|
||
|
}
|
||
|
SIMPLEQ_FOREACH(ra_rdnss_conf,
|
||
|
&ra_iface_conf->ra_options.ra_rdnss_list, entry) {
|
||
|
if (main_sendboth(IMSG_RECONF_RA_RDNSS, ra_rdnss_conf,
|
||
|
sizeof(*ra_rdnss_conf)) == -1)
|
||
|
return (-1);
|
||
|
}
|
||
|
SIMPLEQ_FOREACH(ra_dnssl_conf,
|
||
|
&ra_iface_conf->ra_options.ra_dnssl_list, entry) {
|
||
|
if (main_sendboth(IMSG_RECONF_RA_DNSSL, ra_dnssl_conf,
|
||
|
sizeof(*ra_dnssl_conf)) == -1)
|
||
|
return (-1);
|
||
|
}
|
||
|
SIMPLEQ_FOREACH(pref64,
|
||
|
&ra_iface_conf->ra_options.ra_pref64_list, entry) {
|
||
|
if (main_sendboth(IMSG_RECONF_RA_PREF64, pref64,
|
||
|
sizeof(*pref64)) == -1)
|
||
|
return (-1);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* Tell children the revised config is now complete. */
|
||
|
if (main_sendboth(IMSG_RECONF_END, NULL, 0) == -1)
|
||
|
return (-1);
|
||
|
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
int
|
||
|
main_sendboth(enum imsg_type type, void *buf, uint16_t len)
|
||
|
{
|
||
|
if (imsg_compose_event(iev_frontend, type, 0, 0, -1, buf, len) == -1)
|
||
|
return (-1);
|
||
|
if (imsg_compose_event(iev_engine, type, 0, 0, -1, buf, len) == -1)
|
||
|
return (-1);
|
||
|
return (0);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
free_ra_iface_conf(struct ra_iface_conf *ra_iface_conf)
|
||
|
{
|
||
|
struct ra_prefix_conf *prefix;
|
||
|
struct ra_pref64_conf *pref64;
|
||
|
|
||
|
if (!ra_iface_conf)
|
||
|
return;
|
||
|
|
||
|
free(ra_iface_conf->autoprefix);
|
||
|
|
||
|
while ((prefix = SIMPLEQ_FIRST(&ra_iface_conf->ra_prefix_list)) !=
|
||
|
NULL) {
|
||
|
SIMPLEQ_REMOVE_HEAD(&ra_iface_conf->ra_prefix_list, entry);
|
||
|
free(prefix);
|
||
|
}
|
||
|
|
||
|
free_dns_options(&ra_iface_conf->ra_options);
|
||
|
|
||
|
while ((pref64 =
|
||
|
SIMPLEQ_FIRST(&ra_iface_conf->ra_options.ra_pref64_list)) != NULL) {
|
||
|
SIMPLEQ_REMOVE_HEAD(&ra_iface_conf->ra_options.ra_pref64_list,
|
||
|
entry);
|
||
|
free(pref64);
|
||
|
}
|
||
|
|
||
|
free(ra_iface_conf);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
free_dns_options(struct ra_options_conf *ra_options)
|
||
|
{
|
||
|
struct ra_rdnss_conf *ra_rdnss;
|
||
|
struct ra_dnssl_conf *ra_dnssl;
|
||
|
|
||
|
while ((ra_rdnss = SIMPLEQ_FIRST(&ra_options->ra_rdnss_list)) != NULL) {
|
||
|
SIMPLEQ_REMOVE_HEAD(&ra_options->ra_rdnss_list, entry);
|
||
|
free(ra_rdnss);
|
||
|
}
|
||
|
ra_options->rdnss_count = 0;
|
||
|
|
||
|
while ((ra_dnssl = SIMPLEQ_FIRST(&ra_options->ra_dnssl_list)) != NULL) {
|
||
|
SIMPLEQ_REMOVE_HEAD(&ra_options->ra_dnssl_list, entry);
|
||
|
free(ra_dnssl);
|
||
|
}
|
||
|
ra_options->dnssl_len = 0;
|
||
|
}
|
||
|
|
||
|
void
|
||
|
merge_config(struct rad_conf *conf, struct rad_conf *xconf)
|
||
|
{
|
||
|
struct ra_iface_conf *ra_iface_conf;
|
||
|
struct ra_pref64_conf *pref64;
|
||
|
|
||
|
/* Remove & discard existing interfaces. */
|
||
|
while ((ra_iface_conf = SIMPLEQ_FIRST(&conf->ra_iface_list)) != NULL) {
|
||
|
SIMPLEQ_REMOVE_HEAD(&conf->ra_iface_list, entry);
|
||
|
free_ra_iface_conf(ra_iface_conf);
|
||
|
}
|
||
|
free_dns_options(&conf->ra_options);
|
||
|
|
||
|
while ((pref64 = SIMPLEQ_FIRST(&conf->ra_options.ra_pref64_list))
|
||
|
!= NULL) {
|
||
|
SIMPLEQ_REMOVE_HEAD(&conf->ra_options.ra_pref64_list, entry);
|
||
|
free(pref64);
|
||
|
}
|
||
|
|
||
|
conf->ra_options = xconf->ra_options;
|
||
|
SIMPLEQ_INIT(&conf->ra_options.ra_rdnss_list);
|
||
|
SIMPLEQ_INIT(&conf->ra_options.ra_dnssl_list);
|
||
|
SIMPLEQ_INIT(&conf->ra_options.ra_pref64_list);
|
||
|
|
||
|
/* Add new interfaces. */
|
||
|
SIMPLEQ_CONCAT(&conf->ra_iface_list, &xconf->ra_iface_list);
|
||
|
|
||
|
/* Add dns options */
|
||
|
SIMPLEQ_CONCAT(&conf->ra_options.ra_rdnss_list,
|
||
|
&xconf->ra_options.ra_rdnss_list);
|
||
|
SIMPLEQ_CONCAT(&conf->ra_options.ra_dnssl_list,
|
||
|
&xconf->ra_options.ra_dnssl_list);
|
||
|
SIMPLEQ_CONCAT(&conf->ra_options.ra_pref64_list,
|
||
|
&xconf->ra_options.ra_pref64_list);
|
||
|
free(xconf);
|
||
|
}
|
||
|
|
||
|
struct rad_conf *
|
||
|
config_new_empty(void)
|
||
|
{
|
||
|
struct rad_conf *xconf;
|
||
|
|
||
|
xconf = calloc(1, sizeof(*xconf));
|
||
|
if (xconf == NULL)
|
||
|
fatal(NULL);
|
||
|
|
||
|
SIMPLEQ_INIT(&xconf->ra_iface_list);
|
||
|
|
||
|
xconf->ra_options.dfr = 1;
|
||
|
xconf->ra_options.cur_hl = 0;
|
||
|
xconf->ra_options.m_flag = 0;
|
||
|
xconf->ra_options.o_flag = 0;
|
||
|
xconf->ra_options.router_lifetime = ADV_DEFAULT_LIFETIME;
|
||
|
xconf->ra_options.reachable_time = 0;
|
||
|
xconf->ra_options.retrans_timer = 0;
|
||
|
xconf->ra_options.mtu = 0;
|
||
|
xconf->ra_options.rdns_lifetime = DEFAULT_RDNS_LIFETIME;
|
||
|
SIMPLEQ_INIT(&xconf->ra_options.ra_rdnss_list);
|
||
|
SIMPLEQ_INIT(&xconf->ra_options.ra_dnssl_list);
|
||
|
SIMPLEQ_INIT(&xconf->ra_options.ra_pref64_list);
|
||
|
|
||
|
return (xconf);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
config_clear(struct rad_conf *conf)
|
||
|
{
|
||
|
struct rad_conf *xconf;
|
||
|
|
||
|
/* Merge current config with an empty config. */
|
||
|
xconf = config_new_empty();
|
||
|
merge_config(conf, xconf);
|
||
|
|
||
|
free(conf);
|
||
|
}
|
||
|
|
||
|
void
|
||
|
mask_prefix(struct in6_addr* in6, int len)
|
||
|
{
|
||
|
uint8_t bitmask[8] = {0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe};
|
||
|
int i, skip;
|
||
|
|
||
|
if (len < 0 || len > 128)
|
||
|
fatalx("invalid prefix length: %d", len);
|
||
|
|
||
|
skip = len / 8;
|
||
|
|
||
|
if (skip < 16)
|
||
|
in6->s6_addr[skip] &= bitmask[len % 8];
|
||
|
|
||
|
for (i = skip + 1; i < 16; i++)
|
||
|
in6->s6_addr[i] = 0;
|
||
|
}
|
||
|
|
||
|
const char*
|
||
|
sin6_to_str(struct sockaddr_in6 *sin6)
|
||
|
{
|
||
|
static char hbuf[NI_MAXHOST];
|
||
|
int error;
|
||
|
|
||
|
error = getnameinfo((struct sockaddr *)sin6, sin6->sin6_len, hbuf,
|
||
|
sizeof(hbuf), NULL, 0, NI_NUMERICHOST | NI_NUMERICSERV);
|
||
|
if (error) {
|
||
|
log_warnx("%s", gai_strerror(error));
|
||
|
strlcpy(hbuf, "unknown", sizeof(hbuf));
|
||
|
}
|
||
|
return hbuf;
|
||
|
}
|
||
|
|
||
|
const char*
|
||
|
in6_to_str(struct in6_addr *in6)
|
||
|
{
|
||
|
|
||
|
struct sockaddr_in6 sin6;
|
||
|
|
||
|
memset(&sin6, 0, sizeof(sin6));
|
||
|
sin6.sin6_len = sizeof(sin6);
|
||
|
sin6.sin6_family = AF_INET6;
|
||
|
sin6.sin6_addr = *in6;
|
||
|
|
||
|
return (sin6_to_str(&sin6));
|
||
|
}
|
||
|
|
||
|
void
|
||
|
open_icmp6sock(int rdomain)
|
||
|
{
|
||
|
int icmp6sock, on = 1, off = 0;
|
||
|
|
||
|
log_debug("%s: %d", __func__, rdomain);
|
||
|
|
||
|
if ((icmp6sock = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC,
|
||
|
IPPROTO_ICMPV6)) == -1)
|
||
|
fatal("ICMPv6 socket");
|
||
|
|
||
|
if (setsockopt(icmp6sock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on,
|
||
|
sizeof(on)) == -1)
|
||
|
fatal("IPV6_RECVPKTINFO");
|
||
|
|
||
|
if (setsockopt(icmp6sock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &on,
|
||
|
sizeof(on)) == -1)
|
||
|
fatal("IPV6_RECVHOPLIMIT");
|
||
|
|
||
|
if (setsockopt(icmp6sock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &off,
|
||
|
sizeof(off)) == -1)
|
||
|
fatal("IPV6_RECVHOPLIMIT");
|
||
|
|
||
|
if (setsockopt(icmp6sock, SOL_SOCKET, SO_RTABLE, &rdomain,
|
||
|
sizeof(rdomain)) == -1) {
|
||
|
/* we might race against removal of the rdomain */
|
||
|
log_warn("setsockopt SO_RTABLE");
|
||
|
close(icmp6sock);
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
main_imsg_compose_frontend(IMSG_ICMP6SOCK, icmp6sock, &rdomain,
|
||
|
sizeof(rdomain));
|
||
|
}
|