D14460.id39585.diff
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	Index: head/sbin/dhclient/Makefile
	===================================================================
	--- head/sbin/dhclient/Makefile
	+++ head/sbin/dhclient/Makefile
	@@ -50,7 +50,8 @@
	CFLAGS+=-DWITH_CASPER
	.endif

	-WARNS?= 3
	+WARNS?= 4
	+NO_WCAST_ALIGN= yes

	HAS_TESTS=
	SUBDIR.${MK_TESTS}+= tests
	Index: head/sbin/dhclient/clparse.c
	===================================================================
	--- head/sbin/dhclient/clparse.c
	+++ head/sbin/dhclient/clparse.c
	@@ -687,7 +687,7 @@
	u_int8_t hunkbuf[1024];
	unsigned hunkix = 0;
	char *vendor;
	- char *fmt;
	+ const char *fmt;
	struct universe *universe;
	struct option *option;
	struct iaddr ip_addr;
	Index: head/sbin/dhclient/conflex.c
	===================================================================
	--- head/sbin/dhclient/conflex.c
	+++ head/sbin/dhclient/conflex.c
	@@ -55,7 +55,7 @@
	char *token_line;
	char *prev_line;
	char *cur_line;
	-char *tlname;
	+const char *tlname;
	int eol_token;

	static char line1[81];
	@@ -78,7 +78,7 @@
	static int intern(char *, int);

	void
	-new_parse(char *name)
	+new_parse(const char *name)
	{
	tlname = name;
	lpos = line = 1;
	@@ -264,7 +264,7 @@
	static int
	read_number(int c, FILE *cfile)
	{
	- int seenx = 0, token = NUMBER;
	+ int seenx = 0, _token = NUMBER;
	unsigned i = 0;

	tokbuf[i++] = c;
	@@ -286,7 +286,7 @@
	tokbuf[i] = 0;
	tval = tokbuf;

	- return (token);
	+ return (_token);
	}

	static int
	Index: head/sbin/dhclient/dhclient.c
	===================================================================
	--- head/sbin/dhclient/dhclient.c
	+++ head/sbin/dhclient/dhclient.c
	@@ -91,7 +91,7 @@
	time_t cur_time;
	time_t default_lease_time = 43200; /* 12 hours... */

	-char *path_dhclient_conf = _PATH_DHCLIENT_CONF;
	+const char *path_dhclient_conf = _PATH_DHCLIENT_CONF;
	char *path_dhclient_db = NULL;

	int log_perror = 1;
	@@ -131,10 +131,10 @@
	void usage(void);
	int check_option(struct client_lease *l, int option);
	int check_classless_option(unsigned char *data, int len);
	-int ipv4addrs(char * buf);
	+int ipv4addrs(const char * buf);
	int res_hnok(const char *dn);
	int check_search(const char *srch);
	-char option_as_string(unsigned int code, unsigned char data, int len);
	+const char option_as_string(unsigned int code, unsigned char data, int len);
	int fork_privchld(int, int);

	#define ROUNDUP(a) \
	@@ -201,26 +201,25 @@
	static void
	disassoc(void *arg)
	{
	- struct interface_info *ifi = arg;
	+ struct interface_info *_ifi = arg;

	/*
	* Clear existing state.
	*/
	- if (ifi->client->active != NULL) {
	+ if (_ifi->client->active != NULL) {
	script_init("EXPIRE", NULL);
	script_write_params("old_",
	- ifi->client->active);
	- if (ifi->client->alias)
	+ _ifi->client->active);
	+ if (_ifi->client->alias)
	script_write_params("alias_",
	- ifi->client->alias);
	+ _ifi->client->alias);
	script_go();
	}
	- ifi->client->state = S_INIT;
	+ _ifi->client->state = S_INIT;
	}

	-/* ARGSUSED */
	void
	-routehandler(struct protocol *p)
	+routehandler(struct protocol *p __unused)
	{
	char msg[2048], *addr;
	struct rt_msghdr *rtm;
	@@ -230,7 +229,7 @@
	struct ieee80211_join_event *jev;
	struct client_lease *l;
	time_t t = time(NULL);
	- struct sockaddr *sa;
	+ struct sockaddr_in *sa;
	struct iaddr a;
	ssize_t n;
	int linkstat;
	@@ -254,13 +253,13 @@
	if (scripttime == 0 \|\| t < scripttime + 10)
	break;

	- sa = get_ifa((char *)(ifam + 1), ifam->ifam_addrs);
	+ sa = (struct sockaddr_in)get_ifa((char )(ifam + 1), ifam->ifam_addrs);
	if (sa == NULL)
	break;

	if ((a.len = sizeof(struct in_addr)) > sizeof(a.iabuf))
	error("king bula sez: len mismatch");
	- memcpy(a.iabuf, &((struct sockaddr_in *)sa)->sin_addr, a.len);
	+ memcpy(a.iabuf, &sa->sin_addr, a.len);
	if (addr_eq(a, defaddr))
	break;

	@@ -271,7 +270,7 @@
	if (l == NULL) /* added/deleted addr is not the one we set */
	break;

	- addr = inet_ntoa(((struct sockaddr_in *)sa)->sin_addr);
	+ addr = inet_ntoa(sa->sin_addr);
	if (rtm->rtm_type == RTM_NEWADDR) {
	/*
	* XXX: If someone other than us adds our address,
	@@ -946,7 +945,7 @@
	{
	struct iaddrlist *ap;
	void (handler)(struct packet );
	- char *type;
	+ const char *type;

	switch (packet->packet_type) {
	case DHCPOFFER:
	@@ -984,7 +983,7 @@
	struct client_lease lease, lp;
	int i;
	int arp_timeout_needed, stop_selecting;
	- char *name = packet->options[DHO_DHCP_MESSAGE_TYPE].len ?
	+ const char *name = packet->options[DHO_DHCP_MESSAGE_TYPE].len ?
	"DHCPOFFER" : "BOOTREPLY";

	/* If we're not receptive to an offer right now, or if the offer
	@@ -1993,7 +1992,7 @@
	}

	void
	-script_init(char reason, struct string_list medium)
	+script_init(const char reason, struct string_list medium)
	{
	size_t len, mediumlen = 0;
	struct imsg_hdr hdr;
	@@ -2028,7 +2027,7 @@
	}

	void
	-priv_script_init(char reason, char medium)
	+priv_script_init(const char reason, char medium)
	{
	struct interface_info *ip = ifi;

	@@ -2056,7 +2055,7 @@
	}

	void
	-priv_script_write_params(char prefix, struct client_lease lease)
	+priv_script_write_params(const char prefix, struct client_lease lease)
	{
	struct interface_info *ip = ifi;
	u_int8_t dbuf[1500], *dp = NULL;
	@@ -2196,7 +2195,7 @@
	}

	void
	-script_write_params(char prefix, struct client_lease lease)
	+script_write_params(const char prefix, struct client_lease lease)
	{
	size_t fn_len = 0, sn_len = 0, pr_len = 0;
	struct imsg_hdr hdr;
	@@ -2460,8 +2459,8 @@
	int
	check_option(struct client_lease *l, int option)
	{
	- char *opbuf;
	- char *sbuf;
	+ const char *opbuf;
	+ const char *sbuf;

	/* we use this, since this is what gets passed to dhclient-script */

	@@ -2721,7 +2720,7 @@
	* otherwise, return 0
	*/
	int
	-ipv4addrs(char * buf)
	+ipv4addrs(const char * buf)
	{
	struct in_addr jnk;
	int count = 0;
	@@ -2739,7 +2738,7 @@
	}


	-char *
	+const char *
	option_as_string(unsigned int code, unsigned char *data, int len)
	{
	static char optbuf[32768]; /* XXX */
	Index: head/sbin/dhclient/dhcpd.h
	===================================================================
	--- head/sbin/dhclient/dhcpd.h
	+++ head/sbin/dhclient/dhcpd.h
	@@ -235,7 +235,7 @@

	struct hash_bucket {
	struct hash_bucket *next;
	- unsigned char *name;
	+ const unsigned char *name;
	int len;
	unsigned char *value;
	};
	@@ -258,26 +258,27 @@
	/* options.c */
	int cons_options(struct packet , struct dhcp_packet , int,
	struct tree_cache *, int, int, int, u_int8_t , int);
	-char *pretty_print_option(unsigned int,
	+const char *pretty_print_option(unsigned int,
	unsigned char *, int, int, int);
	void do_packet(struct interface_info , struct dhcp_packet ,
	int, unsigned int, struct iaddr, struct hardware *);

	/* errwarn.c */
	extern int warnings_occurred;
	-void error(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
	-int warning(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
	-int note(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
	-int debug(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
	-int parse_warn(char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
	+void error(const char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
	+int warning(const char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
	+int note(const char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
	+int debug(const char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));
	+int parse_warn(const char *, ...) __attribute__ ((__format__ (__printf__, 1, 2)));

	/* conflex.c */
	extern int lexline, lexchar;
	-extern char token_line, tlname;
	+extern char *token_line;
	+extern const char *tlname;
	extern char comments[4096];
	extern int comment_index;
	extern int eol_token;
	-void new_parse(char *);
	+void new_parse(const char *);
	int next_token(char *, FILE );
	int peek_token(char *, FILE );

	@@ -321,7 +322,7 @@
	void got_one(struct protocol *);
	void add_timeout(time_t, void ()(void ), void *);
	void cancel_timeout(void ()(void ), void *);
	-void add_protocol(char , int, void ()(struct protocol ), void );
	+void add_protocol(const char , int, void ()(struct protocol ), void );
	void remove_protocol(struct protocol *);
	int interface_link_status(char *);
	void interface_set_mtu_unpriv(int, u_int16_t);
	@@ -329,8 +330,8 @@

	/* hash.c */
	struct hash_table *new_hash(void);
	-void add_hash(struct hash_table , unsigned char , int, unsigned char *);
	-unsigned char hash_lookup(struct hash_table , unsigned char *, int);
	+void add_hash(struct hash_table , const unsigned char , int, unsigned char *);
	+void hash_lookup(struct hash_table , unsigned char *, int);

	/* tables.c */
	extern struct option dhcp_options[256];
	@@ -358,7 +359,7 @@

	/* dhclient.c */
	extern cap_channel_t *capsyslog;
	-extern char *path_dhclient_conf;
	+extern const char *path_dhclient_conf;
	extern char *path_dhclient_db;
	extern time_t cur_time;
	extern int log_priority;
	@@ -393,12 +394,12 @@
	void rewrite_client_leases(void);
	void write_client_lease(struct interface_info , struct client_lease , int);

	-void priv_script_init(char , char );
	-void priv_script_write_params(char , struct client_lease );
	+void priv_script_init(const char , char );
	+void priv_script_write_params(const char , struct client_lease );
	int priv_script_go(void);

	-void script_init(char , struct string_list );
	-void script_write_params(char , struct client_lease );
	+void script_init(const char , struct string_list );
	+void script_write_params(const char , struct client_lease );
	int script_go(void);
	void client_envadd(struct client_state *,
	const char , const char , const char *, ...);
	@@ -442,7 +443,7 @@

	/* privsep.c */
	struct buf *buf_open(size_t);
	-int buf_add(struct buf , void , size_t);
	+int buf_add(struct buf , const void , size_t);
	int buf_close(int, struct buf *);
	ssize_t buf_read(int, void *, size_t);
	void dispatch_imsg(struct interface_info *, int);
	Index: head/sbin/dhclient/dispatch.c
	===================================================================
	--- head/sbin/dhclient/dispatch.c
	+++ head/sbin/dhclient/dispatch.c
	@@ -49,10 +49,14 @@

	#include <sys/ioctl.h>

	+#include <assert.h>
	#include <net/if_media.h>
	#include <ifaddrs.h>
	#include <poll.h>

	+/* Assert that pointer p is aligned to at least align bytes */
	+#define assert_aligned(p, align) assert((((uintptr_t)p) & ((align) - 1)) == 0)
	+
	struct protocol *protocols;
	struct timeout *timeouts;
	static struct timeout *free_timeouts;
	@@ -73,7 +77,6 @@
	discover_interfaces(struct interface_info *iface)
	{
	struct ifaddrs ifap, ifa;
	- struct sockaddr_in foo;
	struct ifreq *tif;

	if (getifaddrs(&ifap) != 0)
	@@ -93,15 +96,30 @@
	* and record it in a linked list.
	*/
	if (ifa->ifa_addr->sa_family == AF_LINK) {
	- struct sockaddr_dl *foo =
	- (struct sockaddr_dl *)ifa->ifa_addr;
	+ struct sockaddr_dl *foo;

	+ /*
	+ * The implementation of getifaddrs should guarantee
	+ * this alignment
	+ */
	+ assert_aligned(ifa->ifa_addr,
	+ _Alignof(struct sockaddr_dl));
	+#ifdef __clang__
	+#pragma clang diagnostic push
	+#pragma clang diagnostic ignored "-Wcast-align"
	+#endif
	+ foo = (struct sockaddr_dl *)ifa->ifa_addr;
	+#ifdef __clang__
	+#pragma clang diagnostic pop
	+#endif
	+
	iface->index = foo->sdl_index;
	iface->hw_address.hlen = foo->sdl_alen;
	iface->hw_address.htype = HTYPE_ETHER; /* XXX */
	memcpy(iface->hw_address.haddr,
	LLADDR(foo), foo->sdl_alen);
	} else if (ifa->ifa_addr->sa_family == AF_INET) {
	+ struct sockaddr_in foo;
	struct iaddr addr;

	memcpy(&foo, ifa->ifa_addr, sizeof(foo));
	@@ -437,7 +455,7 @@

	/* Add a protocol to the list of protocols... */
	void
	-add_protocol(char name, int fd, void (handler)(struct protocol *),
	+add_protocol(const char name, int fd, void (handler)(struct protocol *),
	void *local)
	{
	struct protocol *p;
	Index: head/sbin/dhclient/errwarn.c
	===================================================================
	--- head/sbin/dhclient/errwarn.c
	+++ head/sbin/dhclient/errwarn.c
	@@ -49,7 +49,7 @@

	#include "dhcpd.h"

	-static void do_percentm(char obuf, size_t size, char ibuf);
	+static void do_percentm(char obuf, size_t size, const char ibuf);

	static char mbuf[1024];
	static char fbuf[1024];
	@@ -60,7 +60,7 @@
	* Log an error message, then exit.
	*/
	void
	-error(char *fmt, ...)
	+error(const char *fmt, ...)
	{
	va_list list;

	@@ -94,7 +94,7 @@
	* Log a warning message...
	*/
	int
	-warning(char *fmt, ...)
	+warning(const char *fmt, ...)
	{
	va_list list;

	@@ -120,7 +120,7 @@
	* Log a note...
	*/
	int
	-note(char *fmt, ...)
	+note(const char *fmt, ...)
	{
	va_list list;

	@@ -146,7 +146,7 @@
	* Log a debug message...
	*/
	int
	-debug(char *fmt, ...)
	+debug(const char *fmt, ...)
	{
	va_list list;

	@@ -172,10 +172,10 @@
	* Find %m in the input string and substitute an error message string.
	*/
	static void
	-do_percentm(char obuf, size_t size, char ibuf)
	+do_percentm(char obuf, size_t size, const char ibuf)
	{
	char ch;
	- char *s = ibuf;
	+ const char *s = ibuf;
	char *t = obuf;
	size_t prlen;
	size_t fmt_left;
	@@ -205,7 +205,7 @@
	}

	int
	-parse_warn(char *fmt, ...)
	+parse_warn(const char *fmt, ...)
	{
	va_list list;
	static char spaces[] =
	Index: head/sbin/dhclient/hash.c
	===================================================================
	--- head/sbin/dhclient/hash.c
	+++ head/sbin/dhclient/hash.c
	@@ -47,7 +47,7 @@

	#include "dhcpd.h"

	-static int do_hash(unsigned char *, int, int);
	+static int do_hash(const unsigned char *, int, int);

	struct hash_table *
	new_hash(void)
	@@ -62,9 +62,9 @@
	}

	static int
	-do_hash(unsigned char *name, int len, int size)
	+do_hash(const unsigned char *name, int len, int size)
	{
	- unsigned char *s = name;
	+ const unsigned char *s = name;
	int accum = 0, i = len;

	while (i--) {
	@@ -77,7 +77,7 @@
	return (accum % size);
	}

	-void add_hash(struct hash_table table, unsigned char name, int len,
	+void add_hash(struct hash_table table, const unsigned char name, int len,
	unsigned char *pointer)
	{
	struct hash_bucket *bp;
	@@ -86,7 +86,7 @@
	if (!table)
	return;
	if (!len)
	- len = strlen((char *)name);
	+ len = strlen((const char *)name);

	hashno = do_hash(name, len, table->hash_count);
	bp = new_hash_bucket();
	@@ -102,7 +102,7 @@
	table->buckets[hashno] = bp;
	}

	-unsigned char *
	+void *
	hash_lookup(struct hash_table table, unsigned char name, int len)
	{
	struct hash_bucket *bp;
	Index: head/sbin/dhclient/options.c
	===================================================================
	--- head/sbin/dhclient/options.c
	+++ head/sbin/dhclient/options.c
	@@ -628,7 +628,7 @@
	/*
	* Format the specified option so that a human can easily read it.
	*/
	-char *
	+const char *
	pretty_print_option(unsigned int code, unsigned char *data, int len,
	int emit_commas, int emit_quotes)
	{
	Index: head/sbin/dhclient/privsep.h
	===================================================================
	--- head/sbin/dhclient/privsep.h
	+++ head/sbin/dhclient/privsep.h
	@@ -46,6 +46,6 @@
	};

	struct buf *buf_open(size_t);
	-int buf_add(struct buf , void , size_t);
	+int buf_add(struct buf , const void , size_t);
	int buf_close(int, struct buf *);
	ssize_t buf_read(int sock, void *, size_t);
	Index: head/sbin/dhclient/privsep.c
	===================================================================
	--- head/sbin/dhclient/privsep.c
	+++ head/sbin/dhclient/privsep.c
	@@ -39,7 +39,7 @@
	}

	int
	-buf_add(struct buf buf, void data, size_t len)
	+buf_add(struct buf buf, const void data, size_t len)
	{
	if (buf->wpos + len > buf->size)
	return (-1);
	Index: head/sbin/dhclient/tables.c
	===================================================================
	--- head/sbin/dhclient/tables.c
	+++ head/sbin/dhclient/tables.c
	@@ -440,11 +440,11 @@
	for (i = 0; i < 256; i++) {
	dhcp_universe.options[i] = &dhcp_options[i];
	add_hash(dhcp_universe.hash,
	- (unsigned char *)dhcp_options[i].name, 0,
	+ (const unsigned char *)dhcp_options[i].name, 0,
	(unsigned char *)&dhcp_options[i]);
	}
	universe_hash.hash_count = DEFAULT_HASH_SIZE;
	add_hash(&universe_hash,
	- (unsigned char *)dhcp_universe.name, 0,
	+ (const unsigned char *)dhcp_universe.name, 0,
	(unsigned char *)&dhcp_universe);
	}
	Index: head/sbin/dhclient/tests/fake.c
	===================================================================
	--- head/sbin/dhclient/tests/fake.c
	+++ head/sbin/dhclient/tests/fake.c
	@@ -9,7 +9,7 @@
	extern jmp_buf env;

	void
	-error(char *fmt, ...)
	+error(const char *fmt, ...)
	{
	va_list ap;

	@@ -22,7 +22,7 @@
	}

	int
	-warning(char *fmt, ...)
	+warning(const char *fmt, ...)
	{
	va_list ap;

	@@ -39,7 +39,7 @@
	}

	int
	-note(char *fmt, ...)
	+note(const char *fmt, ...)
	{
	int ret;
	va_list ap;
	Index: head/sbin/dhclient/tree.h
	===================================================================
	--- head/sbin/dhclient/tree.h
	+++ head/sbin/dhclient/tree.h
	@@ -57,14 +57,14 @@
	};

	struct universe {
	- char *name;
	+ const char *name;
	struct hash_table *hash;
	struct option *options[256];
	};

	struct option {
	- char *name;
	- char *format;
	+ const char *name;
	+ const char *format;
	struct universe *universe;
	unsigned char code;
	};

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