330 lines
8.1 KiB
C
330 lines
8.1 KiB
C
/* $NetBSD: altqd.c,v 1.11 2011/08/29 20:38:54 joerg Exp $ */
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/* $KAME: altqd.c,v 1.10 2002/02/20 10:42:26 kjc Exp $ */
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/*
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* Copyright (c) 2001 Theo de Raadt
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Copyright (C) 1997-2002
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* Sony Computer Science Laboratories, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/stat.h>
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#include <net/if.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <syslog.h>
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#include <err.h>
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#ifndef __FreeBSD__
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#include <util.h>
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#endif
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#include <altq/altq.h>
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#include "altq_qop.h"
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#include "quip_server.h"
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#ifdef __FreeBSD__
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#define ALTQD_PID_FILE "/var/run/altqd.pid"
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#endif
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#define MAX_CLIENT 10
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static volatile sig_atomic_t gotsig_hup, gotsig_int, gotsig_term;
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__dead static void usage(void);
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static void sig_handler(int);
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static void
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usage(void)
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{
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fprintf(stderr, "usage: %s [-dv] [-f config]\n", getprogname());
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exit(1);
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}
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static void
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sig_handler(int sig)
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{
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switch (sig) {
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case SIGHUP:
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gotsig_hup = 1;
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break;
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case SIGINT:
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gotsig_int = 1;
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break;
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case SIGTERM:
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gotsig_term = 1;
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break;
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case SIGPIPE:
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/*
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* we have lost an API connection.
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* a subsequent output operation will catch EPIPE.
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*/
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break;
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}
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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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int i, c, maxfd, rval, qpsock, fd;
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fd_set fds, rfds;
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FILE *fp, *client[MAX_CLIENT];
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m_debug = 0;
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l_debug = LOG_INFO;
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fp = NULL;
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for (i = 0; i < MAX_CLIENT; i++)
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client[i] = NULL;
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while ((c = getopt(argc, argv, "f:vdl:")) != -1) {
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switch (c) {
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case 'f':
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altqconfigfile = optarg;
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break;
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case 'v':
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l_debug = LOG_DEBUG;
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m_debug |= DEBUG_ALTQ;
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daemonize = 0;
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break;
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case 'd':
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daemonize = 0;
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break;
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case 'l':
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l_debug = atoi(optarg);
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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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signal(SIGINT, sig_handler);
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signal(SIGTERM, sig_handler);
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signal(SIGHUP, sig_handler);
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signal(SIGPIPE, sig_handler);
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if (daemonize)
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openlog("altqd", LOG_PID, LOG_DAEMON);
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if (qcmd_init() != 0) {
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if (daemonize)
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closelog();
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exit(1);
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}
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/*
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* open a unix domain socket for altqd clients
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*/
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if ((qpsock = socket(AF_LOCAL, SOCK_STREAM, 0)) < 0)
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LOG(LOG_ERR, errno, "can't open unix domain socket");
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else {
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struct sockaddr_un addr;
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bzero(&addr, sizeof(addr));
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addr.sun_family = AF_LOCAL;
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strlcpy(addr.sun_path, QUIP_PATH, sizeof(addr.sun_path));
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unlink(QUIP_PATH);
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if (bind(qpsock, (struct sockaddr *)&addr,
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sizeof(addr)) < 0) {
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LOG(LOG_ERR, errno, "can't bind to %s", QUIP_PATH);
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close(qpsock);
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qpsock = -1;
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}
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chmod(QUIP_PATH, 0666);
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if (listen(qpsock, SOMAXCONN) < 0) {
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LOG(LOG_ERR, errno, "can't listen to %s", QUIP_PATH);
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close(qpsock);
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qpsock = -1;
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}
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}
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if (daemonize) {
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daemon(0, 0);
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/* save pid to the pid file (/var/tmp/altqd.pid) */
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#ifdef __FreeBSD__
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{
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FILE *fp;
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if ((fp = fopen(ALTQD_PID_FILE, "w")) != NULL) {
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fprintf(fp, "%d\n", getpid());
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fclose(fp);
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} else
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LOG(LOG_WARNING, errno, "can't open pid file");
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}
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#else
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pidfile(NULL);
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#endif
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} else {
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/* interactive mode */
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fp = stdin;
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printf("\nEnter ? or command:\n");
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printf("altqd %s> ", cur_ifname());
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fflush(stdout);
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}
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/*
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* go into the command mode.
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*/
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FD_ZERO(&fds);
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maxfd = 0;
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if (fp != NULL) {
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fd = fileno(fp);
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if (fd == -1)
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LOG(LOG_ERR, 0, "bad file descriptor", QUIP_PATH);
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} else
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fd = -1;
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if (fd != -1) {
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FD_SET(fd, &fds);
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maxfd = MAX(maxfd, fd + 1);
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}
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if (qpsock >= 0) {
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FD_SET(qpsock, &fds);
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maxfd = MAX(maxfd, qpsock + 1);
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}
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rval = 1;
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while (rval) {
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if (gotsig_hup) {
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qcmd_destroyall();
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gotsig_hup = 0;
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LOG(LOG_INFO, 0, "reinitializing altqd...");
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if (qcmd_init() != 0) {
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LOG(LOG_INFO, 0, "reinitialization failed");
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break;
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}
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}
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if (gotsig_term || gotsig_int) {
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LOG(LOG_INFO, 0, "Exiting on signal %d",
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gotsig_term ? SIGTERM : SIGINT);
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break;
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}
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FD_COPY(&fds, &rfds);
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if (select(maxfd, &rfds, NULL, NULL, NULL) < 0) {
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if (errno != EINTR)
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err(1, "select");
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continue;
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}
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/*
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* if there is command input, read the input line,
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* parse it, and execute.
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*/
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if (fp && FD_ISSET(fd, &rfds)) {
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rval = do_command(fp);
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if (rval == 0) {
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/* quit command or eof on input */
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LOG(LOG_INFO, 0, "Exiting.");
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} else if (fp == stdin)
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printf("altqd %s> ", cur_ifname());
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fflush(stdout);
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} else if (qpsock >= 0 && FD_ISSET(qpsock, &rfds)) {
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/*
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* quip connection request from client via unix
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* domain socket; get a new socket for this
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* connection and add it to the select list.
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*/
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int newsock = accept(qpsock, NULL, NULL);
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if (newsock == -1) {
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LOG(LOG_ERR, errno, "accept");
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continue;
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}
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FD_SET(newsock, &fds);
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for (i = 0; i < MAX_CLIENT; i++)
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if (client[i] == NULL) {
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client[i] = fdopen(newsock, "r+");
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break;
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}
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maxfd = MAX(maxfd, newsock + 1);
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} else {
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/*
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* check input from a client via unix domain socket
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*/
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for (i = 0; i < MAX_CLIENT; i++) {
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int fd1;
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if (client[i] == NULL)
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continue;
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fd1 = fileno(client[i]);
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if (FD_ISSET(fd1, &rfds)) {
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if (quip_input(client[i]) != 0 ||
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fflush(client[i]) != 0) {
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/* connection closed */
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fclose(client[i]);
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client[i] = NULL;
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FD_CLR(fd1, &fds);
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}
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}
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}
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}
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}
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/* cleanup and exit */
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qcmd_destroyall();
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if (qpsock >= 0)
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(void)close(qpsock);
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unlink(QUIP_PATH);
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for (i = 0; i < MAX_CLIENT; i++)
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if (client[i] != NULL)
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(void)fclose(client[i]);
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if (daemonize) {
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#ifdef __FreeBSD__
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/* if we have a pid file, remove it */
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unlink(ALTQD_PID_FILE);
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#endif
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closelog();
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}
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exit(0);
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}
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