added the custom dhcpcd client to git.

1 files changed, 364 insertions, 0 deletions

diff --git a/workspace/customdhcpcd/src/dhcpcd.c b/workspace/customdhcpcd/src/dhcpcd.c
new file mode 100644
index 0000000..97a685a
--- /dev/null
+++ b/workspace/customdhcpcd/src/dhcpcd.c
@@ -0,0 +1,364 @@
+/* 
+ * dhcpcd - DHCP client daemon
+ * Copyright 2006-2008 Roy Marples <roy@marples.name>
+ * All rights reserved
+
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+const char copyright[] = "Copyright (c) 2006-2008 Roy Marples";
+
+#include <sys/file.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <paths.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "config.h"
+#include "client.h"
+#include "dhcpcd.h"
+#include "dhcp.h"
+#include "interface.h"
+#include "logger.h"
+#include "socket.h"
+#include "version.h"
+
+static int doversion = 0;
+static int dohelp = 0;
+#define EXTRA_OPTS
+static const struct option longopts[] = {
+	{"arp",         no_argument,        NULL, 'a'},
+	{"script",      required_argument,  NULL, 'c'},
+	{"debug",       no_argument,        NULL, 'd'},
+	{"hostname",    optional_argument,  NULL, 'h'},
+	{"classid",     optional_argument,  NULL, 'i'},
+	{"release",     no_argument,        NULL, 'k'},
+	{"leasetime",   required_argument,  NULL, 'l'},
+	{"metric",      required_argument,  NULL, 'm'},
+	{"renew",       no_argument,        NULL, 'n'},
+	{"persistent",  no_argument,        NULL, 'p'},
+	{"inform",      optional_argument,  NULL, 's'},
+	{"request",     optional_argument,  NULL, 'r'},
+	{"timeout",     required_argument,  NULL, 't'},
+	{"userclass",   required_argument,  NULL, 'u'},
+	{"exit",        no_argument,        NULL, 'x'},
+	{"lastlease",   no_argument,        NULL, 'E'},
+	{"fqdn",        required_argument,  NULL, 'F'},
+	{"nogateway",   no_argument,        NULL, 'G'},
+	{"sethostname", no_argument,        NULL, 'H'},
+	{"clientid",    optional_argument,  NULL, 'I'},
+	{"noipv4ll",    no_argument,        NULL, 'L'},
+	{"nomtu",       no_argument,        NULL, 'M'},
+	{"nontp",       no_argument,        NULL, 'N'},
+	{"nodns",       no_argument,        NULL, 'R'},
+	{"msscr",       no_argument,        NULL, 'S'},
+	{"test",        no_argument,        NULL, 'T'},
+	{"nonis",       no_argument,        NULL, 'Y'},
+	{"help",        no_argument,        &dohelp, 1},
+	{"version",     no_argument,        &doversion, 1},
+#ifdef THERE_IS_NO_FORK
+	{"daemonised",	no_argument,        NULL, 'f'},
+	{"skiproutes",  required_argument,  NULL, 'g'},
+#endif
+	{NULL,          0,                  NULL, 0}
+};
+
+#ifdef THERE_IS_NO_FORK
+char dhcpcd[PATH_MAX];
+char **dhcpcd_argv = NULL;
+int dhcpcd_argc = 0;
+char *dhcpcd_skiproutes = NULL;
+#undef EXTRA_OPTS
+#define EXTRA_OPTS "fg:"
+#endif
+
+static int atoint (const char *s)
+{
+	char *t;
+	long n;
+
+	errno = 0;
+	n = strtol (s, &t, 0);
+	if ((errno != 0 && n == 0) || s == t ||
+	    (errno == ERANGE && (n == LONG_MAX || n == LONG_MIN)))
+	{
+		logger (LOG_ERR, "`%s' out of range", s);
+		return (-1);	
+	}
+
+	return ((int) n);
+}
+
+static pid_t read_pid (const char *pidfile)
+{
+	FILE *fp;
+	pid_t pid = 0;
+
+	if ((fp = fopen (pidfile, "r")) == NULL) {
+		errno = ENOENT;
+		return 0;
+	}
+
+	fscanf (fp, "%d", &pid);
+	fclose (fp);
+
+
+	return (pid);
+}
+
+static void usage (void)
+{
+	printf ("usage: "PACKAGE" [-adknpEGHMNRSTY] [-c script] [-h hostname] [-i classID]\n"
+		"              [-l leasetime] [-m metric] [-r ipaddress] [-s ipaddress]\n"
+		"              [-t timeout] [-u userclass] [-F none | ptr | both]\n"
+		"              [-I clientID] <interface>\n");
+}
+
+
+int nd_main(char *ifname)
+{
+	options_t *options;
+	int userclasses = 0;
+	int opt;
+	int option_index = 0;
+	char *prefix;
+	pid_t pid;
+	int debug = 0;
+	int i;
+	int pidfd = -1;
+	int sig = 0;
+	int retval = EXIT_FAILURE;
+
+	/* Close any un-needed fd's */
+	for (i = getdtablesize() - 1; i >= 3; --i)
+		close (i);
+
+	openlog (PACKAGE, LOG_PID, LOG_LOCAL0);
+
+	options = xzalloc (sizeof (*options));
+	options->script = (char *) DEFAULT_SCRIPT;
+	snprintf (options->classid, CLASS_ID_MAX_LEN, "%s %s",
+		  PACKAGE, VERSION);
+
+	options->doarp = true;
+	options->dodns = true;
+	options->domtu = true;
+	options->donis = true;
+	options->dontp = true;
+	options->dogateway = true;
+	options->daemonise = true;
+	options->doinform = false;
+	options->doipv4ll = true;
+	options->doduid = true;
+	options->timeout = DEFAULT_TIMEOUT;
+
+	gethostname (options->hostname, sizeof (options->hostname));
+	if (strcmp (options->hostname, "(none)") == 0 ||
+	    strcmp (options->hostname, "localhost") == 0)
+		memset (options->hostname, 0, sizeof (options->hostname));
+
+
+/*
+#ifdef THERE_IS_NO_FORK
+	dhcpcd_argv = argv;
+	dhcpcd_argc = argc;
+	if (! realpath (argv[0], dhcpcd)) {
+		logger (LOG_ERR, "unable to resolve the path `%s': %s",
+			argv[0], strerror (errno));
+		goto abort;
+	}
+#endif
+*/
+
+	if (strlen (ifname) > IF_NAMESIZE) {
+			logger (LOG_ERR,
+				"`%s' too long for an interface name (max=%d)",
+				ifname, IF_NAMESIZE);
+			goto abort;
+	} else {
+		strlcpy (options->interface, ifname,
+			 sizeof (options->interface));
+	}
+
+	if (strchr (options->hostname, '.')) {
+		if (options->fqdn == FQDN_DISABLE)
+			options->fqdn = FQDN_BOTH;
+	} else
+		options->fqdn = FQDN_DISABLE;
+
+	if (options->request_address.s_addr == 0 && options->doinform) {
+		if ((options->request_address.s_addr =
+		     get_address (options->interface)) != 0)
+			options->keep_address = true;
+	}
+
+	if (IN_LINKLOCAL (ntohl (options->request_address.s_addr))) {
+		logger (LOG_ERR,
+			"you are not allowed to request a link local address");
+		goto abort;
+	}
+
+	if (geteuid ())
+		logger (LOG_WARNING, PACKAGE " will not work correctly unless"
+			" run as root");
+
+	prefix = xmalloc (sizeof (char) * (IF_NAMESIZE + 3));
+	snprintf (prefix, IF_NAMESIZE, "%s: ", options->interface);
+	setlogprefix (prefix);
+	snprintf (options->pidfile, sizeof (options->pidfile), PIDFILE,
+		  options->interface);
+	free (prefix);
+
+	chdir ("/");
+	umask (022);
+
+	if (mkdir (INFODIR, S_IRUSR | S_IWUSR |S_IXUSR | S_IRGRP | S_IXGRP
+		   | S_IROTH | S_IXOTH) && errno != EEXIST)
+	{
+		logger (LOG_ERR,
+			"mkdir(\"%s\",0): %s\n", INFODIR, strerror (errno));
+		goto abort;
+	}
+
+	if (mkdir (ETCDIR, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP
+		   | S_IROTH | S_IXOTH) && errno != EEXIST)
+	{
+		logger (LOG_ERR,
+			"mkdir(\"%s\",0): %s\n", ETCDIR, strerror (errno));
+		goto abort;
+	}
+
+	if (options->test) {
+		if (options->dorequest || options->doinform) {
+			logger (LOG_ERR,
+				"cannot test with --inform or --request");
+			goto abort;
+		}
+
+		if (options->dolastlease) {
+			logger (LOG_ERR, "cannot test with --lastlease");
+			goto abort;
+		}
+
+		if (sig != 0) {
+			logger (LOG_ERR,
+				"cannot test with --release or --renew");
+			goto abort;
+		}
+	}
+
+	if (sig != 0) {
+		int killed = -1;
+		pid = read_pid (options->pidfile);
+		if (pid != 0)
+			logger (LOG_INFO, "sending signal %d to pid %d",
+				sig, pid);
+
+		if (! pid || (killed = kill (pid, sig)))
+			logger (sig == SIGALRM ? LOG_INFO : LOG_ERR,
+				""PACKAGE" not running");
+
+		if (pid != 0 && (sig != SIGALRM || killed != 0))
+			unlink (options->pidfile);
+
+		if (killed == 0) {
+			retval = EXIT_SUCCESS;
+			goto abort;
+		}
+
+		if (sig != SIGALRM)
+			goto abort;
+	}
+
+	if (! options->test && ! options->daemonised) {
+		if ((pid = read_pid (options->pidfile)) > 0 &&
+		    kill (pid, 0) == 0)
+		{
+			logger (LOG_ERR, ""PACKAGE
+				" already running on pid %d (%s)",
+				pid, options->pidfile);
+			goto abort;
+		}
+
+		pidfd = open (options->pidfile,
+			      O_WRONLY | O_CREAT | O_NONBLOCK, 0664);
+		if (pidfd == -1) {
+			logger (LOG_ERR, "open `%s': %s",
+				options->pidfile, strerror (errno));
+			goto abort;
+		}
+
+		/* Lock the file so that only one instance of dhcpcd runs
+		 * on an interface */
+		if (flock (pidfd, LOCK_EX | LOCK_NB) == -1) {
+			logger (LOG_ERR, "flock `%s': %s",
+				options->pidfile, strerror (errno));
+			goto abort;
+		}
+
+		/* dhcpcd.sh should not interhit this fd */
+		if ((i = fcntl (pidfd, F_GETFD, 0)) == -1 ||
+		    fcntl (pidfd, F_SETFD, i | FD_CLOEXEC) == -1)
+			logger (LOG_ERR, "fcntl: %s", strerror (errno));
+
+		writepid (pidfd, getpid ());
+		logger (LOG_INFO, PACKAGE " " VERSION " starting");
+	}
+
+	/* Seed random */
+	srandomdev ();
+
+	/* Massage our filters per platform */
+	setup_packet_filters ();
+
+	if (dhcp_run (options, &pidfd) == 0)
+		retval = EXIT_SUCCESS;
+
+abort:
+	/* If we didn't daemonise then we need to punt the pidfile now */
+	if (pidfd > -1) {
+		close (pidfd);
+		unlink (options->pidfile);
+	}
+
+	free (options);
+
+#ifdef THERE_IS_NO_FORK
+	/* There may have been an error before the dhcp_run function
+	 * clears this, so just do it here to be safe */
+	free (dhcpcd_skiproutes);
+#endif
+
+	logger (LOG_INFO, "exiting");
+
+	exit (retval);
+	/* NOTREACHED */
+}