--- dhcp-3.0.5/client/dhclient.c.libdhcp4client	2007-02-04 14:25:27.000000000 -0500
+++ dhcp-3.0.5/client/dhclient.c	2007-02-04 14:29:41.000000000 -0500
@@ -78,7 +78,9 @@
 int extended_option_environment = 0;
 #endif
 int bootp_broadcast_always = 0;
-
+#ifdef LIBDHCP
+FILE *leaseFile=0;
+#endif
 static void usage PROTO ((void));
 
 void do_release(struct client_state *);
@@ -89,10 +91,57 @@
 
 extern u_int32_t default_requested_options[];
 
-int main (argc, argv, envp)
+#ifdef LIBDHCP
+#include "libdhcp_control.h"
+LIBDHCP_Control *libdhcp_control;
+static void libdhcp_dispatch(void)
+{
+    struct timeval tv={0,0}, *tvp;
+    isc_result_t status;
+
+    /* Wait for a packet, or a timeout, or libdhcp being finished */
+    do {
+	tvp = process_outstanding_timeouts (&tv);	
+	status = omapi_one_dispatch (0, tvp);
+	if ( libdhcp_control 
+	   &&( (status == ISC_R_TIMEDOUT)
+	     ||(libdhcp_control->timeout
+	       &&( time(0L) >= 
+	           ( libdhcp_control->timeout 
+	            +libdhcp_control->now
+	           )
+	         )
+	       )
+	     )
+	   )
+	{
+	    if( libdhcp_control -> callback )
+		libdhcp_control -> callback
+		    ( libdhcp_control, DHC_TIMEDOUT, 0L );
+	    break;
+	}
+    } while 
+      ( (status != ISC_R_TIMEDOUT) 
+      &&( (!libdhcp_control)
+        ||(!(libdhcp_control->finished))
+	)
+      );
+}
+
+extern void omapi_free_all_pointers(void);
+int dhcpv4_client
+(libdhcp_ctl, argc, argv, envp)
+LIBDHCP_Control *libdhcp_ctl;
+#else
+int main
+(argc, argv, envp)
+#endif
 	int argc;
 	char **argv, **envp;
 {
+#ifdef LIBDHCP
+        libdhcp_control = libdhcp_ctl;
+#endif
 	int i;
 	struct servent *ent;
 	struct interface_info *ip;
@@ -118,7 +167,7 @@
 	int timeout_arg = 0;
 	char *arg_conf = 0L;
 	int arg_conf_len=0;
-
+#ifndef LIBDHCP
 	/* Make sure we have stdin, stdout and stderr. */
 	i = open ("/dev/null", O_RDWR);
 	if (i == 0)
@@ -139,7 +188,7 @@
 #if !(defined (DEBUG) || defined (SYSLOG_4_2) || defined (__CYGWIN32__))
 	setlogmask (LOG_UPTO (LOG_INFO));
 #endif	
-
+#endif
 	/* Set up the OMAPI. */
 	status = omapi_init ();
 	if (status != ISC_R_SUCCESS)
@@ -468,9 +517,12 @@
 		log_fatal("dhclient(%u) is already running - exiting. ", dhcpid);
 		return(1);
 	    }	    
-	}	
+	}
+#ifdef LIBDHCP
+	if ( libdhcp_control && (libdhcp_control->capability & DHCP_USE_PID_FILE) )
+#endif
 	write_client_pid_file();
-
+#ifndef LIBDHCP
 	if (!quiet) {
 		log_info ("%s %s", message, DHCP_VERSION);
 		log_info (copyright);
@@ -479,7 +531,7 @@
 		log_info ("%s", "");
 	} else
 		log_perror = 0;
-
+#endif
 	/* If we're given a relay agent address to insert, for testing
 	   purposes, figure out what it is. */
 	if (relay) {
@@ -766,12 +818,18 @@
 		arg_conf_len = 0L;
 	}
 		
+#ifdef LIBDHCP
+	if ( libdhcp_control && (libdhcp_control->capability & DHCP_USE_LEASE_DATABASE))
+	{
+#endif
 	/* Parse the lease database. */
 	read_client_leases ();
 
 	/* Rewrite the lease database... */
 	rewrite_client_leases ();
-
+#ifdef LIBDHCP
+	}
+#endif
 	/* XXX */
 /* 	config_counter(&snd_counter, &rcv_counter); */
 
@@ -789,7 +847,7 @@
 		if (!persist) {
 			/* Nothing more to do. */
 			log_info ("No broadcast interfaces found - exiting.");
-			exit (0);
+			return (0);
 		}
 	} else if (!release_mode) {
 		/* Call the script with the list of interfaces. */
@@ -884,7 +942,7 @@
 	dmalloc_longterm = dmalloc_outstanding;
 	dmalloc_outstanding = 0;
 #endif
-
+#ifndef LIBDHCP
 	/* If we're not supposed to wait before getting the address,
 	   don't. */
 	if (nowait)
@@ -897,7 +955,125 @@
 
 	/* Start dispatching packets and timeouts... */
 	dispatch ();
+#else
+	if (  libdhcp_control )
+	{
+	   if ( libdhcp_control->timeout ) 
+	       libdhcp_control->now = time(0L);
+	   else
+	       libdhcp_control->now = 0;
+	}
+	libdhcp_dispatch();
 
+	/* libdhcp is finished with us. */
+
+	/* close all file descriptors:  */
+	for (ip = interfaces; ip; ip = ip -> next) {
+	    shutdown( ip -> wfdesc, SHUT_RDWR );
+	    close(ip -> wfdesc);
+	    if( ip -> rfdesc != ip -> wfdesc )
+		close(ip -> rfdesc);
+	}
+	if( fallback_interface != 0 )
+	{
+	    ip = fallback_interface;
+	    shutdown( ip -> wfdesc, SHUT_RDWR );
+	    close(ip -> wfdesc);
+	    if( ip -> rfdesc != ip -> wfdesc )
+		close(ip -> rfdesc);
+	}
+	if (leaseFile)
+	    fclose (leaseFile);
+	closelog();
+	
+	char *current_pid_file = _PATH_DHCLIENT_PID;
+
+	/* Free ALL allocated memory: */
+	omapi_free_all_pointers();
+
+	/* Re-Initialize globals: */
+	client_env = 0;
+	client_env_count = 0;
+	default_lease_time = 43200;
+
+	dhcp_max_agent_option_packet_length = 0;
+	extended_option_environment = 0;
+	iaddr_any.len = 4;
+	memset(&(iaddr_any.iabuf[0]),'\0',4);
+	iaddr_broadcast.len = 4;
+	memset(&(iaddr_broadcast.iabuf[0]),0xff,4);
+	interfaces_requested = 0;
+	leaseFile = 0;
+
+	libdhcp_control = 0;
+	
+	local_port = 0;
+	no_daemon=0;
+	nowait=0;
+	onetry=0;
+	quiet=0;
+	max_lease_time = 86400;
+	path_dhclient_conf = _PATH_DHCLIENT_CONF;
+	path_dhclient_db = _PATH_DHCLIENT_DB;	
+	path_dhclient_pid = _PATH_DHCLIENT_PID;
+	strcpy(&(path_dhclient_script_array[0]), _PATH_DHCLIENT_SCRIPT);
+	path_dhclient_script = path_dhclient_script_array;
+	remote_port = 0;
+	resolver_inited = 0;
+	new_option_info_tree = 0;
+	log_isc_blurb = 0;
+	log_perror = 1;
+	global_scope = 0L;
+	root_group = 0L;
+	group_name_hash = 0L;
+	interfaces = 0L;
+	dummy_interfaces = 0L;
+	fallback_interface = 0L;
+extern int have_setup_fallback;
+        have_setup_fallback=0;
+	quiet_interface_discovery=1;
+#ifndef LIBDHCP
+	timeouts = 0L;
+#endif
+	dhcp_type_interface=0L;
+	interface_vector = 0L;
+	interface_count =0;
+	interface_max = 0;
+	name_servers = 0;
+	domains = 0;
+	dhcp_type_interface=0L;
+	dhcp_type_group=0L;
+	dhcp_type_shared_network=0L;
+	dhcp_type_control=0L;
+	memset(&dhcp_universe, '\0', sizeof(struct universe));
+	memset(&nwip_universe, '\0', sizeof(struct universe));
+	memset(&fqdn_universe, '\0', sizeof(struct universe));
+	universe_hash = 0;
+	universes=0;
+	universe_count=0;
+	universe_max=0;
+	config_universe = 0;	
+extern struct hash_bucket *free_hash_buckets;
+	free_hash_buckets=0L;
+extern struct dhcp_packet *dhcp_free_list;
+	dhcp_free_list = 0L;
+extern struct packet *packet_free_list;
+	packet_free_list = 0L;
+extern struct binding_value *free_binding_values;
+	free_binding_values=0L;
+extern struct expression *free_expressions;
+	free_expressions=0L;
+extern struct option_cache *free_option_caches;
+	free_option_caches=0L;
+extern  struct packet *free_packets;
+	free_packets=0L;
+extern  pair free_pairs;
+	free_pairs=0L;
+extern omapi_io_object_t omapi_io_states;
+        memset(&omapi_io_states, '\0', sizeof(omapi_io_states));
+	dhcp_control_object=0L;
+	unlink(current_pid_file);
+#endif
 	/*NOTREACHED*/
 	return 0;
 }
@@ -1292,7 +1468,20 @@
 	if (client -> new -> rebind < cur_time)
 		client -> new -> rebind = TIME_MAX;
 
+#ifdef LIBDHCP
+    /* We need the server's siaddr for the 'bootServer'
+     * pump option 
+     */
+    u_int32_t set_siaddr = 0;  
+    set_siaddr = client -> packet.siaddr.s_addr;
+    client->packet.siaddr.s_addr = packet->raw->siaddr.s_addr;
+#endif
+
 	bind_lease (client);
+
+#ifdef LIBDHCP
+    client->packet.siaddr.s_addr = set_siaddr;
+#endif
 }
 
 void bind_lease (client)
@@ -1328,6 +1517,9 @@
 		return;
 	}
 
+#ifdef LIBDHCP
+	if ( libdhcp_control && (libdhcp_control->capability & DHCP_USE_LEASE_DATABASE))
+#endif
 	/* Write out the new lease. */
 	write_client_lease (client, client -> new, 0, 0);
 
@@ -1427,13 +1619,13 @@
 {
 	return 0;
 }
-
+#ifndef LIBDHCP
 int write_lease (lease)
 	struct lease *lease;
 {
 	return 0;
 }
-
+#endif
 int write_host (host)
 	struct host_decl *host;
 {
@@ -2004,6 +2196,10 @@
 	   tell the shell script that we failed to allocate an address,
 	   and try again later. */
 	if (onetry) {
+#ifdef LIBDHCP
+	    script_init (client, "FAIL", (struct string_list *)0);
+	    return;
+#endif
 		if (!quiet)
 			log_info ("Unable to obtain a lease on first try.%s",
 				  "  Exiting.");
@@ -2607,7 +2803,9 @@
 	free_client_lease (lease, MDL);
 }
 
+#ifndef LIBDHCP
 FILE *leaseFile;
+#endif
 
 void rewrite_client_leases ()
 {
@@ -3048,6 +3246,54 @@
 int script_go (client)
 	struct client_state *client;
 {
+#ifdef LIBDHCP
+    struct string_list *sp;
+
+    if (libdhcp_control && libdhcp_control->callback) {
+        int dhcmsg;
+        char *reason="";
+
+        for (sp = client->env; sp; sp = sp->next) 
+            if (strncmp(sp->string, "reason=", 7) == 0) {
+                reason = sp->string + 7;
+                break;
+            }
+
+       if (strcmp(reason,"NBI") == 0)
+            dhcmsg = DHC4_NBI;
+       else if (strcmp(reason,"PREINIT") == 0)
+            dhcmsg = DHC4_PREINIT;
+       else if (strcmp(reason,"BOUND") == 0)
+            dhcmsg = DHC4_BOUND;
+       else if (strcmp(reason,"RENEW") == 0)
+            dhcmsg = DHC4_RENEW;
+       else if (strcmp(reason,"REBOOT") == 0)
+            dhcmsg = DHC4_REBOOT;
+       else if (strcmp(reason,"REBIND") == 0)
+            dhcmsg = DHC4_REBIND;
+       else if (strcmp(reason,"STOP") == 0)
+            dhcmsg = DHC4_STOP;
+       else if (strcmp(reason,"MEDIUM") == 0)
+            dhcmsg = DHC4_MEDIUM;
+       else if (strcmp(reason,"TIMEOUT") == 0)
+            dhcmsg = DHC4_TIMEOUT;
+       else if (strcmp(reason,"FAIL") == 0)
+            dhcmsg = DHC4_FAIL;
+       else if (strcmp(reason,"EXPIRE") == 0)
+            dhcmsg = DHC4_EXPIRE;
+       else if (strcmp(reason,"RELEASE") == 0)
+            dhcmsg = DHC4_RELEASE;
+       else
+            dhcmsg = DHC4_NBI;
+
+       (*libdhcp_control->callback) (libdhcp_control, dhcmsg, client);
+
+       if (libdhcp_control->decline)
+           return 1;
+    }
+
+    return 0;
+#else
 	char *scriptName;
 	char *argv [2];
 	char **envp;
@@ -3121,6 +3367,7 @@
 	GET_TIME (&cur_time);
 	return (WIFEXITED (wstatus) ?
 		WEXITSTATUS (wstatus) : -WTERMSIG (wstatus));
+#endif
 }
 
 void client_envadd (struct client_state *client,
@@ -3211,6 +3458,9 @@
 
 	/* Don't become a daemon if the user requested otherwise. */
 	if (no_daemon) {
+#ifdef LIBDHCP
+	    if ( libdhcp_control && (libdhcp_control->capability & DHCP_USE_PID_FILE ) )
+#endif
 		write_client_pid_file ();
 		return;
 	}
@@ -3219,7 +3469,9 @@
 	if (state)
 		return;
 	state = 1;
-
+#ifdef LIBDHCP
+	return;
+#endif
 	/* Stop logging to stderr... */
 	log_perror = 0;
 
--- dhcp-3.0.5/common/discover.c.libdhcp4client	2007-02-04 14:25:27.000000000 -0500
+++ dhcp-3.0.5/common/discover.c	2007-02-04 14:27:16.000000000 -0500
@@ -121,6 +121,10 @@
    register that interface with the network I/O software, figure out what
    subnet it's on, and add it to the list of interfaces. */
 
+#ifdef LIBDHCP
+int have_setup_fallback = 0;
+#endif
+
 void discover_interfaces (state)
 	int state;
 {
@@ -139,7 +143,9 @@
 	char *s;
 #endif
 	isc_result_t status;
+#ifndef LIBDHCP
 	static int setup_fallback = 0;
+#endif
 	int wifcount = 0;
 
 	/* Create an unbound datagram socket to do the SIOCGIFADDR ioctl on. */
@@ -691,12 +697,17 @@
 		log_info ("%s", "");
 		log_fatal ("Not configured to listen on any interfaces!");
 	}
-
+#ifdef LIBDHCP
+	if (!have_setup_fallback) {
+		have_setup_fallback = 1;
+		maybe_setup_fallback ();
+	}
+#else
 	if (!setup_fallback) {
 		setup_fallback = 1;
 		maybe_setup_fallback ();
 	}
-
+#endif
 #if defined (HAVE_SETFD)
 	if (fallback_interface) {
 	    if (fcntl (fallback_interface -> rfdesc, F_SETFD, 1) < 0)
@@ -811,7 +822,7 @@
 					omapi_typed_data_t *value)
 {
 	struct interface_info *interface;
-	isc_result_t status;
+    isc_result_t status;
 
 	if (h -> type != dhcp_type_interface)
 		return ISC_R_INVALIDARG;
--- dhcp-3.0.5/common/lpf.c.libdhcp4client	2007-02-04 14:25:27.000000000 -0500
+++ dhcp-3.0.5/common/lpf.c	2007-02-04 14:25:28.000000000 -0500
@@ -246,6 +246,7 @@
 	struct interface_info *info;
 {
 	struct sock_fprog p;
+	memset(&p,'\0', sizeof(struct sock_fprog));
 
 	/* Set up the bpf filter program structure.    This is defined in
 	   bpf.c */
--- dhcp-3.0.5/common/alloc.c.libdhcp4client	2007-02-04 14:25:27.000000000 -0500
+++ dhcp-3.0.5/common/alloc.c	2007-02-04 14:25:28.000000000 -0500
@@ -1009,7 +1009,11 @@
 	return 1;
 }
 
+#ifdef LIBDHCP
+struct packet *free_packets;
+#else
 static struct packet *free_packets;
+#endif
 
 #if defined (DEBUG_MEMORY_LEAKAGE) || \
 		defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
--- dhcp-3.0.5/dst/hmac_link.c.libdhcp4client	2007-02-04 14:25:27.000000000 -0500
+++ dhcp-3.0.5/dst/hmac_link.c	2007-02-04 14:25:28.000000000 -0500
@@ -38,6 +38,10 @@
 
 #include "dst_internal.h"
 
+#ifdef LIBDHCP
+extern void* dmalloc(size_t,char *,int);
+#endif
+
 #ifdef USE_MD5
 # include "md5.h"
 # ifndef _MD5_H_
@@ -86,7 +90,11 @@
 	MD5_CTX *ctx = NULL;
 
 	if (mode & SIG_MODE_INIT) 
+#ifdef LIBDHCP
+		ctx = (MD5_CTX *) dmalloc(sizeof(*ctx),__FILE__,__LINE__);
+#else
 		ctx = (MD5_CTX *) malloc(sizeof(*ctx));
+#endif
 	else if (context)
 		ctx = (MD5_CTX *) *context;
 	if (ctx == NULL) 
@@ -153,7 +161,11 @@
 	MD5_CTX *ctx = NULL;
 
 	if (mode & SIG_MODE_INIT) 
-		ctx = (MD5_CTX *) malloc(sizeof(*ctx));
+#ifdef LIBDHCP
+		ctx = (MD5_CTX *) dmalloc(sizeof(*ctx),__FILE__,__LINE__);
+#else
+	        ctx = (MD5_CTX *) malloc(sizeof(*ctx));
+#endif
 	else if (context)
 		ctx = (MD5_CTX *) *context;
 	if (ctx == NULL) 
@@ -217,8 +229,11 @@
 
 	if (dkey == NULL || key == NULL || keylen < 0)
 		return (-1);
-
+#ifdef  LIBDHCP
+	if ((hkey = (HMAC_Key *) dmalloc(sizeof(HMAC_Key),__FILE__,__LINE__)) == NULL)
+#else
 	if ((hkey = (HMAC_Key *) malloc(sizeof(HMAC_Key))) == NULL)
+#endif
 		  return (-2);
 
 	memset(hkey->hk_ipad, 0, sizeof(hkey->hk_ipad));
@@ -347,7 +362,11 @@
 	if (eol == NULL)
 		return (-4);
 	len = eol - p;
+#ifdef LIBDHCP
+	tmp = dmalloc(len + 2,__FILE__,__LINE__);
+#else
 	tmp = malloc(len + 2);
+#endif
 	memcpy(tmp, p, len);
 	*(tmp + len) = 0x0;
 	key_len = b64_pton((char *)tmp, key, HMAC_LEN+1);	/* see above */
@@ -439,8 +458,11 @@
 		return(0);
 	
 	len = size > 64 ? 64 : size;
+#ifdef LIBDHCP
+	buff = dmalloc(len+8,__FILE__,__LINE__);
+#else
 	buff = malloc(len+8);
-
+#endif
 	n = dst_random(DST_RAND_SEMI, len, buff);
 	n += dst_random(DST_RAND_KEY, len, buff);
 	if (n <= len) {	/* failed getting anything */
@@ -463,7 +485,11 @@
 {
 	if (dst_t_func[KEY_HMAC_MD5] != NULL)
 		return (1);
+#ifdef LIBDHCP
+	dst_t_func[KEY_HMAC_MD5] = dmalloc(sizeof(struct dst_func),__FILE__,__LINE__);
+#else
 	dst_t_func[KEY_HMAC_MD5] = malloc(sizeof(struct dst_func));
+#endif
 	if (dst_t_func[KEY_HMAC_MD5] == NULL)
 		return (0);
 	memset(dst_t_func[KEY_HMAC_MD5], 0, sizeof(struct dst_func));
--- dhcp-3.0.5/dst/md5_dgst.c.libdhcp4client	2004-06-14 14:50:06.000000000 -0400
+++ dhcp-3.0.5/dst/md5_dgst.c	2007-02-04 14:25:28.000000000 -0500
@@ -65,7 +65,7 @@
 
 #ifdef USE_MD5 /* Added by ogud@tis.com 1998/1/26 */
 
-const char *MD5_version="MD5 part of SSLeay 0.8.1 19-Jul-1997";
+const char *MD5_version __attribute__((visibility ("hidden"))) ="MD5 part of SSLeay 0.8.1 19-Jul-1997";
 
 /* Implemented from RFC1321 The MD5 Message-Digest Algorithm
  */
@@ -81,6 +81,7 @@
 static void md5_block();
 #endif
 
+__attribute__((visibility ("hidden")))
 void MD5_Init(c)
 MD5_CTX *c;
 	{
@@ -93,6 +94,7 @@
 	c->num=0;
 	}
 
+__attribute__((visibility ("hidden")))
 void MD5_Update(c, data, len)
 MD5_CTX *c;
 const register unsigned char *data;
@@ -298,6 +300,7 @@
 	c->D+=D&0xffffffffL;
 	}
 
+__attribute__((visibility ("hidden")))
 void MD5_Final(md, c)
 unsigned char *md;
 MD5_CTX *c;
--- dhcp-3.0.5/minires/ns_date.c.libdhcp4client	2004-06-10 13:59:40.000000000 -0400
+++ dhcp-3.0.5/minires/ns_date.c	2007-02-04 14:25:28.000000000 -0500
@@ -56,6 +56,7 @@
    1 January 1970 (GMT assumed).  Format is yyyymmddhhmmss, all
    digits required, no spaces allowed.  */
 
+__attribute__((visibility ("hidden")))
 u_int32_t
 ns_datetosecs(const char *cp, int *errp) {
 	struct tm time;
--- dhcp-3.0.5/minires/ns_verify.c.libdhcp4client	2004-06-10 13:59:42.000000000 -0400
+++ dhcp-3.0.5/minires/ns_verify.c	2007-02-04 14:25:28.000000000 -0500
@@ -61,6 +61,7 @@
 
 /* Public. */
 
+__attribute__((visibility ("hidden")))
 u_char *
 ns_find_tsig(u_char *msg, u_char *eom) {
 	HEADER *hp = (HEADER *)msg;
@@ -137,6 +138,7 @@
  *	- TSIG verification succeeds, error set to BADSIG (ns_r_badsig)
  *	- TSIG verification succeeds, error set to BADTIME (ns_r_badtime)
  */
+__attribute__((visibility ("hidden")))
 isc_result_t
 ns_verify(u_char *msg, unsigned *msglen, void *k,
 	  const u_char *querysig, unsigned querysiglen,
--- dhcp-3.0.5/minires/ns_parse.c.libdhcp4client	2004-06-10 13:59:40.000000000 -0400
+++ dhcp-3.0.5/minires/ns_parse.c	2007-02-04 14:25:28.000000000 -0500
@@ -47,7 +47,7 @@
 /* Public. */
 
 /* These need to be in the same order as the nres.h:ns_flag enum. */
-struct _ns_flagdata _ns_flagdata[16] = {
+struct _ns_flagdata _ns_flagdata[16] __attribute__((visibility ("hidden"))) = {
 	{ 0x8000, 15 },		/* qr. */
 	{ 0x7800, 11 },		/* opcode. */
 	{ 0x0400, 10 },		/* aa. */
@@ -66,6 +66,7 @@
 	{ 0x0000, 0 },		/* expansion (6/6). */
 };
 
+__attribute__((visibility ("hidden")))
 isc_result_t
 ns_skiprr(const u_char *ptr, const u_char *eom, ns_sect section, int count,
 	  int *rc) {
@@ -94,6 +95,7 @@
 	return ISC_R_SUCCESS;
 }
 
+__attribute__((visibility ("hidden")))
 isc_result_t
 ns_initparse(const u_char *msg, unsigned msglen, ns_msg *handle) {
 	const u_char *eom = msg + msglen;
@@ -136,6 +138,7 @@
 	return ISC_R_SUCCESS;
 }
 
+__attribute__((visibility ("hidden")))
 isc_result_t
 ns_parserr(ns_msg *handle, ns_sect section, int rrnum, ns_rr *rr) {
 	int b;
--- dhcp-3.0.5/minires/ns_samedomain.c.libdhcp4client	2004-06-10 13:59:41.000000000 -0400
+++ dhcp-3.0.5/minires/ns_samedomain.c	2007-02-04 14:25:28.000000000 -0500
@@ -53,6 +53,7 @@
  *	but NOT in "bar.top"
  */
 
+__attribute__((visibility ("hidden")))
 int
 ns_samedomain(const char *a, const char *b) {
 	size_t la, lb;
@@ -152,6 +153,7 @@
  * ns_subdomain(a, b)
  *	is "a" a subdomain of "b"?
  */
+__attribute__((visibility ("hidden")))
 int
 ns_subdomain(const char *a, const char *b) {
 	return (ns_samename(a, b) != 1 && ns_samedomain(a, b));
@@ -169,6 +171,7 @@
  *	foo\\. -> foo\\.
  */
 
+__attribute__((visibility ("hidden")))
 isc_result_t
 ns_makecanon(const char *src, char *dst, size_t dstsize) {
 	size_t n = strlen(src);
@@ -198,6 +201,7 @@
  *	1 if names are the same
  */
 
+__attribute__((visibility ("hidden")))
 int
 ns_samename(const char *a, const char *b) {
 	char ta[NS_MAXDNAME], tb[NS_MAXDNAME];
--- dhcp-3.0.5/minires/ns_name.c.libdhcp4client	2007-02-04 14:25:27.000000000 -0500
+++ dhcp-3.0.5/minires/ns_name.c	2007-02-04 14:25:28.000000000 -0500
@@ -60,6 +60,7 @@
  *	The root is returned as "."
  *	All other domains are returned in non absolute form
  */
+__attribute__((visibility ("hidden")))
 int
 ns_name_ntop(const u_char *src, char *dst, size_t dstsiz) {
 	const u_char *cp;
@@ -146,6 +147,7 @@
  *	Enforces label and domain length limits.
  */
 
+__attribute__((visibility ("hidden")))
 int
 ns_name_pton(const char *src, u_char *dst, size_t dstsiz) {
 	u_char *label, *bp, *eom;
@@ -255,6 +257,7 @@
  *	Enforces label and domain length limits.
  */
 
+__attribute__((visibility ("hidden")))
 int
 ns_name_ntol(const u_char *src, u_char *dst, size_t dstsiz) {
 	const u_char *cp;
@@ -299,6 +302,7 @@
  * return:
  *	-1 if it fails, or consumed octets if it succeeds.
  */
+__attribute__((visibility ("hidden")))
 int
 ns_name_unpack(const u_char *msg, const u_char *eom, const u_char *src,
 	       u_char *dst, size_t dstsiz)
@@ -387,6 +391,7 @@
  *	try to compress names. If 'lastdnptr' is NULL, we don't update the
  *	list.
  */
+__attribute__((visibility ("hidden")))
 int
 ns_name_pack(const u_char *src, u_char *dst, unsigned dstsiz,
 	     const u_char **dnptrs, const u_char **lastdnptr)
@@ -479,6 +484,7 @@
  * note:
  *	Root domain returns as "." not "".
  */
+__attribute__((visibility ("hidden")))
 int
 ns_name_uncompress(const u_char *msg, const u_char *eom, const u_char *src,
 		   char *dst, size_t dstsiz)
@@ -507,6 +513,7 @@
  *	If 'dnptr' is NULL, we don't try to compress names. If 'lastdnptr'
  *	is NULL, we don't update the list.
  */
+__attribute__((visibility ("hidden")))
 int
 ns_name_compress(const char *src, u_char *dst, size_t dstsiz,
 		 const u_char **dnptrs, const u_char **lastdnptr)
@@ -524,6 +531,7 @@
  * return:
  *	0 on success, -1 (with errno set) on failure.
  */
+__attribute__((visibility ("hidden")))
 int
 ns_name_skip(const u_char **ptrptr, const u_char *eom) {
 	const u_char *cp;
--- dhcp-3.0.5/minires/ns_sign.c.libdhcp4client	2004-06-10 13:59:42.000000000 -0400
+++ dhcp-3.0.5/minires/ns_sign.c	2007-02-04 14:25:28.000000000 -0500
@@ -78,6 +78,7 @@
  *	- bad key / sign failed (-BADKEY)
  *	- not enough space (NS_TSIG_ERROR_NO_SPACE)
  */
+__attribute__((visibility ("hidden")))
 isc_result_t
 ns_sign(u_char *msg, unsigned *msglen, unsigned msgsize, int error, void *k,
 	const u_char *querysig, unsigned querysiglen, u_char *sig,
--- dhcp-3.0.5/minires/res_comp.c.libdhcp4client	2007-02-04 14:25:27.000000000 -0500
+++ dhcp-3.0.5/minires/res_comp.c	2007-02-04 14:25:28.000000000 -0500
@@ -103,6 +103,7 @@
  * 'exp_dn' is a pointer to a buffer of size 'length' for the result.
  * Return size of compressed name or -1 if there was an error.
  */
+__attribute__((visibility ("hidden")))
 int
 dn_expand(const u_char *msg, const u_char *eom, const u_char *src,
 	  char *dst, unsigned dstsiz)
@@ -119,6 +120,7 @@
  * Return the size of the compressed name or -1.
  * 'length' is the size of the array pointed to by 'comp_dn'.
  */
+__attribute__((visibility ("hidden")))
 int
 dn_comp(const char *src, u_char *dst, unsigned dstsiz,
 	u_char **dnptrs, u_char **lastdnptr)
@@ -131,6 +133,7 @@
 /*
  * Skip over a compressed domain name. Return the size or -1.
  */
+__attribute__((visibility ("hidden")))
 int
 dn_skipname(const u_char *ptr, const u_char *eom) {
 	const u_char *saveptr = ptr;
--- dhcp-3.0.5/minires/res_mkupdate.c.libdhcp4client	2007-02-04 14:25:27.000000000 -0500
+++ dhcp-3.0.5/minires/res_mkupdate.c	2007-02-04 14:25:28.000000000 -0500
@@ -936,6 +936,7 @@
 
 static struct valuelist *servicelist, *protolist;
 
+__attribute__((visibility ("hidden")))
 void
 res_buildservicelist() {
 	struct servent *sp;
@@ -968,6 +969,7 @@
 	endservent();
 }
 
+__attribute__((visibility ("hidden")))
 void
 res_destroyservicelist() {
 	struct valuelist *slp, *slp_next;
@@ -981,6 +983,7 @@
 	servicelist = (struct valuelist *)0;
 }
 
+__attribute__((visibility ("hidden")))
 void
 res_buildprotolist() {
 	struct protoent *pp;
@@ -1010,6 +1013,7 @@
 	endprotoent();
 }
 
+__attribute__((visibility ("hidden")))
 void
 res_destroyprotolist() {
 	struct valuelist *plp, *plp_next;
@@ -1047,6 +1051,7 @@
 /*
  * Convert service name or (ascii) number to int.
  */
+__attribute__((visibility ("hidden")))
 int
 res_servicenumber(const char *p) {
 	if (servicelist == (struct valuelist *)0)
@@ -1057,6 +1062,7 @@
 /*
  * Convert protocol name or (ascii) number to int.
  */
+__attribute__((visibility ("hidden")))
 int
 res_protocolnumber(const char *p) {
 	if (protolist == (struct valuelist *)0)
@@ -1115,6 +1121,7 @@
 	return (0);
 }
 
+__attribute__((visibility ("hidden")))
 const char *
 res_protocolname(int num) {
 	static char number[8];
@@ -1130,6 +1137,7 @@
 	return (pp->p_name);
 }
 
+__attribute__((visibility ("hidden")))
 const char *
 res_servicename(u_int16_t port, const char *proto) {	/* Host byte order. */
 	static char number[8];
--- dhcp-3.0.5/minires/res_findzonecut.c.libdhcp4client	2004-06-10 13:59:43.000000000 -0400
+++ dhcp-3.0.5/minires/res_findzonecut.c	2007-02-04 14:25:28.000000000 -0500
@@ -139,6 +139,7 @@
  *	keep going.  for the NS and A queries this means we just give up.
  */
 
+__attribute__((visibility ("hidden")))
 isc_result_t
 res_findzonecut(res_state statp, const char *dname, ns_class class, int opts,
 		char *zname, size_t zsize, struct in_addr *addrs, int naddrs,
--- dhcp-3.0.5/minires/res_send.c.libdhcp4client	2004-06-10 13:59:44.000000000 -0400
+++ dhcp-3.0.5/minires/res_send.c	2007-02-04 14:25:28.000000000 -0500
@@ -128,6 +128,7 @@
  * author:
  *	paul vixie, 29may94
  */
+__attribute__((visibility ("hidden")))
 int
 res_ourserver_p(const res_state statp, const struct sockaddr_in *inp) {
 	struct sockaddr_in ina;
@@ -158,6 +159,7 @@
  * author:
  *	paul vixie, 29may94
  */
+__attribute__((visibility ("hidden")))
 int
 res_nameinquery(const char *name, int type, int class,
 		const u_char *buf, const u_char *eom)
@@ -195,6 +197,7 @@
  * author:
  *	paul vixie, 29may94
  */
+__attribute__((visibility ("hidden")))
 int
 res_queriesmatch(const u_char *buf1, const u_char *eom1,
 		 const u_char *buf2, const u_char *eom2)
@@ -233,6 +236,7 @@
 	return (1);
 }
 
+__attribute__((visibility ("hidden")))
 isc_result_t
 res_nsend(res_state statp,
 	  double *buf, unsigned buflen,
@@ -832,6 +836,7 @@
  *
  * This routine is not expected to be user visible.
  */
+__attribute__((visibility ("hidden")))
 void
 res_nclose(res_state statp) {
 	if (statp->_sock >= 0) {
--- dhcp-3.0.5/minires/res_mkquery.c.libdhcp4client	2004-06-10 13:59:43.000000000 -0400
+++ dhcp-3.0.5/minires/res_mkquery.c	2007-02-04 14:25:28.000000000 -0500
@@ -96,6 +96,7 @@
  * Form all types of queries.
  * Returns the size of the result or -1.
  */
+__attribute__((visibility ("hidden")))
 isc_result_t
 res_nmkquery(res_state statp,
 	     int op,			/* opcode of query */
--- dhcp-3.0.5/minires/res_sendsigned.c.libdhcp4client	2004-06-10 13:59:44.000000000 -0400
+++ dhcp-3.0.5/minires/res_sendsigned.c	2007-02-04 14:25:28.000000000 -0500
@@ -41,6 +41,7 @@
 #include <isc-dhcp/dst.h>
 
 /* res_nsendsigned */
+__attribute__((visibility ("hidden")))
 isc_result_t
 res_nsendsigned(res_state statp,
 		double *msg, unsigned msglen, ns_tsig_key *key,
--- dhcp-3.0.5/minires/res_init.c.libdhcp4client	2007-02-04 14:25:27.000000000 -0500
+++ dhcp-3.0.5/minires/res_init.c	2007-02-04 14:25:28.000000000 -0500
@@ -484,6 +484,7 @@
 }
 #endif
 
+__attribute__((visibility ("hidden")))
 u_int
 res_randomid(void) {
 	struct timeval now;
--- dhcp-3.0.5/omapip/alloc.c.libdhcp4client	2007-02-04 14:25:27.000000000 -0500
+++ dhcp-3.0.5/omapip/alloc.c	2007-02-04 14:25:28.000000000 -0500
@@ -40,6 +40,41 @@
 
 #include <omapip/omapip_p.h>
 
+#ifdef LIBDHCP
+/* OK, we need a quick and dirty way of freeing all memory used by libdhcp. 
+   All pointers will be stored in a glibc tree on alloc, and removed on free.
+   This is not too expensive for light single-call library use.
+*/
+#include <search.h>  
+extern void tdestroy (void *root, void (*free_node)(void *nodep));
+static void *all_pointers=0L;
+static int ptr_comparator( const void *p1, const void *p2 )
+{
+    return
+	(  (p1 == p2) 
+	   ? 0
+	   :( (p1 > p2)
+	      ? 1
+	      : -1
+	    )
+	);
+}
+static void record_pointer( void *ptr )
+{
+    tsearch(ptr, &(all_pointers), ptr_comparator);
+}
+static void forget_pointer( void *ptr )
+{
+    tdelete(ptr, &(all_pointers), ptr_comparator);
+}
+void omapi_free_all_pointers(void)
+{
+    if( all_pointers != 0L )
+	tdestroy(all_pointers, free);
+    all_pointers = 0L;
+}
+#endif
+
 #if defined (DEBUG_MEMORY_LEAKAGE) || defined (DEBUG_MALLOC_POOL) || \
 		defined (DEBUG_MEMORY_LEAKAGE_ON_EXIT)
 struct dmalloc_preamble *dmalloc_list;
@@ -77,7 +112,9 @@
 		return (VOIDPTR)0;
 
 	foo = malloc(len);
-
+#ifdef LIBDHCP
+	record_pointer(foo);
+#endif
 	if (!foo)
 		return (VOIDPTR)0;
 	bar = (VOIDPTR)(foo + DMDOFFSET);
@@ -199,6 +236,9 @@
 		     0, (unsigned char *)ptr + DMDOFFSET, 0, 1, RC_MALLOC);
 #endif
 	free (ptr);
+#ifdef LIBDHCP
+	forget_pointer(ptr);
+#endif
 }
 
 #if defined (DEBUG_MEMORY_LEAKAGE) || defined (DEBUG_MALLOC_POOL) || \
--- dhcp-3.0.5/omapip/dispatch.c.libdhcp4client	2007-02-04 14:25:27.000000000 -0500
+++ dhcp-3.0.5/omapip/dispatch.c	2007-02-04 14:25:28.000000000 -0500
@@ -34,7 +34,7 @@
 
 #include <omapip/omapip_p.h>
 
-static omapi_io_object_t omapi_io_states;
+omapi_io_object_t omapi_io_states;
 TIME cur_time;
 
 OMAPI_OBJECT_ALLOC (omapi_io,
--- dhcp-3.0.5/omapip/errwarn.c.libdhcp4client	2007-02-04 14:25:27.000000000 -0500
+++ dhcp-3.0.5/omapip/errwarn.c	2007-02-04 14:25:28.000000000 -0500
@@ -39,6 +39,11 @@
 #include <omapip/omapip_p.h>
 #include <errno.h>
 
+#ifdef LIBDHCP
+#include <libdhcp_control.h>
+extern LIBDHCP_Control *libdhcp_control;
+#endif
+
 #ifdef DEBUG
 int log_perror = -1;
 #else
@@ -50,7 +55,9 @@
 void (*log_cleanup) (void);
 
 #define CVT_BUF_MAX 1023
+#ifndef LIBDHCP
 static char mbuf [CVT_BUF_MAX + 1];
+#endif
 static char fbuf [CVT_BUF_MAX + 1];
 
 /* Log an error message, then exit... */
@@ -60,6 +67,17 @@
   va_list list;
 
   do_percentm (fbuf, fmt);
+  
+#ifdef LIBDHCP
+  if ( libdhcp_control && (libdhcp_control->eh) )
+  {
+      va_start (list, fmt);
+      libdhcp_control->eh(libdhcp_control, LOG_FATAL, fbuf, list);
+      va_end(list);
+      libdhcp_control->finished = 1;
+      return;
+  }
+#else
 
   /* %Audit% This is log output. %2004.06.17,Safe%
    * If we truncate we hope the user can get a hint from the log.
@@ -108,6 +126,7 @@
   if (log_cleanup)
 	  (*log_cleanup) ();
   exit (1);
+#endif
 }
 
 /* Log an error message... */
@@ -118,6 +137,14 @@
 
   do_percentm (fbuf, fmt);
 
+#ifdef LIBDHCP
+  if ( libdhcp_control && libdhcp_control->eh )
+  {
+      va_start (list, fmt);
+      libdhcp_control->eh(libdhcp_control, LOG_ERR, fbuf, list);
+      va_end(list);
+  }
+#else
   /* %Audit% This is log output. %2004.06.17,Safe%
    * If we truncate we hope the user can get a hint from the log.
    */
@@ -134,7 +161,7 @@
 	  r=write (STDERR_FILENO, mbuf, strlen (mbuf));
 	  r=write (STDERR_FILENO, "\n", 1);
   }
-
+#endif
   return 0;
 }
 
@@ -146,6 +173,14 @@
 
   do_percentm (fbuf, fmt);
 
+#ifdef LIBDHCP
+  if ( libdhcp_control && libdhcp_control->eh )
+  {
+      va_start (list, fmt);
+      libdhcp_control->eh(libdhcp_control, LOG_INFO, fbuf, list);
+      va_end(list);
+  }
+#else
   /* %Audit% This is log output. %2004.06.17,Safe%
    * If we truncate we hope the user can get a hint from the log.
    */
@@ -162,7 +197,7 @@
 	  r=write (STDERR_FILENO, mbuf, strlen (mbuf));
 	  r=write (STDERR_FILENO, "\n", 1);
   }
-
+#endif
   return 0;
 }
 
@@ -173,7 +208,14 @@
   va_list list;
 
   do_percentm (fbuf, fmt);
-
+#ifdef LIBDHCP
+  if ( libdhcp_control && libdhcp_control->eh )
+  {
+      va_start (list, fmt);
+      libdhcp_control->eh(libdhcp_control, LOG_DEBUG, fbuf, list);
+      va_end(list);
+  }
+#else
   /* %Audit% This is log output. %2004.06.17,Safe%
    * If we truncate we hope the user can get a hint from the log.
    */
@@ -190,7 +232,7 @@
 	  r=write (STDERR_FILENO, mbuf, strlen (mbuf));
 	  r=write (STDERR_FILENO, "\n", 1);
   }
-
+#endif
   return 0;
 }
 
--- dhcp-3.0.5/configure.libdhcp4client	2004-09-10 17:02:30.000000000 -0400
+++ dhcp-3.0.5/configure	2007-02-04 14:25:28.000000000 -0500
@@ -246,7 +246,7 @@
 fi
 
 if [ x"$dirs" = x ]; then
-  dirs=". client server relay common omapip dhcpctl minires dst"
+  dirs=". client server relay common omapip dhcpctl minires dst libdhcp4client"
 fi
 
 for foo in $dirs; do
--- /dev/null	2007-02-03 10:31:46.831575569 -0500
+++ dhcp-3.0.5/libdhcp4client/Makefile.dist	2007-02-04 14:25:28.000000000 -0500
@@ -0,0 +1,127 @@
+# Makefile.dist for libdhcp4client
+#
+# We get the libdhcp4client library from the patched ISC source code.  We
+# rebuild key C files with -DLIBDHCP to turn on the library features we
+# need.  Normal build results in standard ISC code (i.e., not LIBDHCP
+# stuff enabled).  We then link together a static library and a shared
+# library with the new resulting objects.
+#
+# David Cantrell <dcantrell@redhat.com>
+
+# What version of ISC DHCP is this?
+VER   = $(shell grep DHCP_VERSION ../../includes/version.h | head -1 | cut -d '"' -f 2 | cut -d 'V' -f 2 | cut -d '-' -f 1)
+
+PROGS = libdhcp4client.a libdhcp4client-$(VER).so.0
+
+# NOTE: The ordering of these file lists is important!  We are using the
+# whole program optimization features of gcc, so the order matters here.
+
+# Source files shared by all objects
+COMMON_SRCS = client_clparse.c client_dhclient.c common_alloc.c common_bpf.c \
+              common_comapi.c common_conflex.c common_discover.c \
+              common_dispatch.c common_dns.c common_ethernet.c \
+              common_execute.c common_inet.c common_lpf.c common_memory.c \
+              common_options.c common_packet.c common_parse.c common_print.c \
+              common_socket.c common_tables.c common_tr.c common_tree.c \
+              dst_dst_api.c dst_base64.c dst_hmac_link.c dst_md5_dgst.c \
+              omapip_alloc.c omapip_array.c omapip_auth.c omapip_buffer.c \
+              omapip_connection.c omapip_convert.c omapip_dispatch.c \
+              omapip_errwarn.c omapip_handle.c omapip_hash.c \
+              omapip_listener.c omapip_mrtrace.c omapip_result.c \
+              omapip_support.c omapip_toisc.c omapip_trace.c
+
+# Source files for libdhcp4client.o
+CLIENT_SRCS = common_ctrace.c common_dlpi.c common_nit.c common_upf.c \
+              dst_dst_support.c dst_prandom.c omapip_generic.c \
+              omapip_message.c omapip_protocol.c
+
+# Source files for libres.o (minires)
+MINIRES_SRCS = minires_ns_date.c minires_ns_name.c minires_ns_parse.c \
+               minires_ns_samedomain.c minires_ns_sign.c minires_ns_verify.c \
+               minires_res_comp.c minires_res_findzonecut.c \
+               minires_res_init.c minires_res_mkquery.c \
+               minires_res_mkupdate.c minires_res_query.c minires_res_send.c \
+               minires_res_sendsigned.c minires_res_update.c
+
+HDRS = dhcp4client.h libdhcp_control.h
+SRCS = $(COMMON_SRCS) $(CLIENT_SRCS)
+OBJS = $(SRCS:.c=.o)
+
+INCLUDES = -I$(TOP) -I$(TOP)/includes -I$(TOP)/dst -I.
+CFLAGS   = $(DEBUG) $(PREDEFINES) $(INCLUDES) $(COPTS) \
+           -DCLIENT_PATH=${CLIENT_PATH} -DLIBDHCP -DUSE_MD5
+
+all: $(PROGS)
+
+install: all
+	install -p -m 0755 -D libdhcp4client-$(VER).so.0 $(DESTDIR)$(LIBDIR)/libdhcp4client-$(VER).so.0
+	ln -sf libdhcp4client-$(VER).so.0 $(DESTDIR)/$(LIBDIR)/libdhcp4client.so
+	install -p -m 0644 -D libdhcp4client.a $(DESTDIR)$(LIBDIR)/libdhcp4client.a
+	install -p -m 0644 -D dhcp4client.h $(DESTDIR)$(INCDIR)/dhcp4client/dhcp4client.h
+	install -p -m 0644 -D libdhcp_control.h $(DESTDIR)$(INCDIR)/dhcp4client/libdhcp_control.h
+	( cd $(TOP)/includes ; \
+	  find . -name "*.h" -type f | while read h ; do \
+	      install -p -m 0644 -D $$h $(DESTDIR)$(INCDIR)/dhcp4client/isc_dhcp/$$h ; \
+	  done ; \
+	)
+
+depend:
+	$(MKDEP) $(INCLUDES) $(PREDEFINES) $(SRCS)
+
+clean:
+	-rm -f $(OBJS)
+
+realclean: clean
+	-rm -f $(PROG) *~ #*
+
+distclean: realclean
+	-rm -f Makefile
+
+# This isn't the cleanest way to set up links, but I prefer this so I don't
+# need object targets for each subdirectory.  The idea is simple.  Since
+# libdhcp4client is a linked together wad of objects from across the source
+# tree, we change / to _ when linking source files here.  Follow this example:
+#
+# We need to use client/dhclient.c, so we make this link:
+#     rm -f client_dhclient.c
+#     ln -s $(TOP)/client/dhclient.c client_dhclient.c
+#
+# Simple.  Given the way the ISC build system works, this is the easiest to
+# maintain and least invasive.
+#
+# David Cantrell <dcantrell@redhat.com>
+links:
+	@for target in $(SRCS); do \
+		source="`echo $$target | sed -e 's|_|/|'`"; \
+		if [ ! -b $$target ]; then \
+			rm -f $$target; \
+		fi; \
+		ln -s $(TOP)/$$source $$target; \
+	done; \
+	for hdr in $(HDRS); do \
+		if [ ! -b $$hdr ]; then \
+			rm -f $$hdr; \
+		fi; \
+		ln -s $(TOP)/libdhcp4client/$$hdr $$hdr; \
+	done
+
+# minires is difficult to build because it overrides things in common and dst,
+# so we just link with the already built libres.a since we need it all anyway
+libres.a:
+	if [ ! -f ../minires/$@ ]; then \
+		$(MAKE) -C ../minires; \
+	fi; \
+	ln ../minires/libres.a .; \
+	$(AR) x libres.a
+
+# Create the libraries
+# minires/res_query.o contains an undefined symbol __h_errno_set, is not
+# used by any dhcp code, and is optimized out by the linker when producing
+# the dhclient executable or a shared library
+libdhcp4client.a: $(OBJS) libres.a
+	$(AR) crus $@ $(OBJS) `$(AR) t libres.a | grep -v res_query.o`
+
+libdhcp4client-$(VER).so.0: $(OBJS) libres.a
+	$(CC) -shared -o $@ -Wl,-soname,$@ $(OBJS) `$(AR) t libres.a | grep -v res_query.o`
+
+# Dependencies (semi-automatically-generated)
--- /dev/null	2007-02-03 10:31:46.831575569 -0500
+++ dhcp-3.0.5/libdhcp4client/dhcp4client.h	2007-02-04 14:25:28.000000000 -0500
@@ -0,0 +1,24 @@
+/* dhcp4client.h
+ *
+ *  Interface to the ISC dhcp IPv4 client libdhcp4client library.
+ *
+ *
+ *  Copyright(C) Jason Vas Dias <jvdias@redhat.com> Red Hat Inc. May 2006
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation at 
+ *           http://www.fsf.org/licensing/licenses/gpl.txt
+ *  and included in this software distribution as the "LICENSE" file.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ */
+
+struct libdhcp_control_s;  /* include libdhcp_control.h or libdhcp.h for this */
+
+extern int dhcpv4_client( struct libdhcp_control_s *dhc_ctl, int argc, char **argv, char **envp);
+    /* The ISC IPv4 DHCP client main() function .
+     */
--- /dev/null	2007-02-03 10:31:46.831575569 -0500
+++ dhcp-3.0.5/libdhcp4client/libdhcp_control.h	2007-02-04 14:25:28.000000000 -0500
@@ -0,0 +1,102 @@
+/* libdhcp_control.h
+ *
+ *  DHCP client control API for libdhcp, a minimal interface to the
+ *  ISC dhcp IPv4 client libdhcp4client library,
+ *  and to the dhcpv6 DHCPv6 client libdhcp6client library.
+ *
+ *  Each DHCP client library must include this file to be controlled
+ *  by libdhcp.
+ *
+ *  Copyright(C) Jason Vas Dias <jvdias@redhat.com> Red Hat Inc. May 2006
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation at 
+ *           http://www.fsf.org/licensing/licenses/gpl.txt
+ *  and included in this software distribution as the "LICENSE" file.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ */
+#ifndef LIBDHCP_CONTROL_H
+#define LIBDHCP_CONTROL_H
+
+#include <stdint.h>
+
+#define  LOG_FATAL 8
+
+typedef enum dhcp_state_e
+{
+
+    /* DHCPv4 client states - third callback arg will be a 'struct client_state *'    */
+    DHC4_NBI,         		/* failed: no broadcast interfaces found              */
+    DHC4_PREINIT, 		/* configuration started - bring the interface "UP"   */
+    DHC4_BOUND, 		/* lease obtained                                     */
+    DHC4_RENEW, 		/* lease renewed                                      */
+    DHC4_REBOOT,	        /* have valid lease, but now obtained a different one */
+    DHC4_REBIND, 		/* new, different lease                               */
+    DHC4_STOP,  		/* remove old lease                                   */
+    DHC4_MEDIUM, 		/* media selection begun                              */
+    DHC4_TIMEOUT, 		/* timed out contacting DHCP server                   */
+    DHC4_FAIL, 			/* all attempts to contact server timed out, sleeping */
+    DHC4_EXPIRE, 		/* lease has expired, renewing                        */
+    DHC4_RELEASE, 		/* releasing lease                                    */
+    /* This state raised by both clients: */
+    DHC_TIMEDOUT,               /* libdhcp_control timeout has been exceeded          */
+    /* DHCPv6 client states:    */
+    DHC6_BOUND,                 /* new lease obtained             - arg is optinfo *  */
+    DHC6_REBIND,                /* existing expired lease rebound - arg is optinfo *  */
+    DHC6_RELEASE                /* existing lease expired         - arg is dhcp6_iaidaddr*/
+} DHCP_State;
+
+struct libdhcp_control_s;
+
+typedef
+int ( *LIBDHCP_Error_Handler )
+    ( struct libdhcp_control_s *ctl,
+      int priority,  /* ala syslog(3): LOG_EMERG=0 - LOG_DEBUG=7 (+ LOG_FATAL=8 : finished -> 1)   */
+      const char *fmt,
+      va_list ap
+    );
+
+typedef 
+int ( *LIBDHCP_Callback ) ( struct libdhcp_control_s *control, enum dhcp_state_e, void* );
+    /* The DHCP clients will call the users' callback on important state change events,
+     * with the second arg set to the client DHCP_State, and the third arg set to
+     * a client specific pointer as described below.
+     */
+
+typedef 
+struct libdhcp_control_s
+{
+    LIBDHCP_Callback    callback;    	/* the DHCP clients' main loop calls this on state changes */
+    uint16_t            capability;     /* LIBDHCP_Capability bits to enable                       */
+    uint8_t             finished;       /* set to one to make clients exit their main loop         */
+    uint8_t             decline;        /* set to one to decline the lease (DHCPv4 only)           */
+    time_t              timeout;        /* (timeout+now) == time after which clients MUST return   */
+    time_t              now;            /* clients set this to time(0) on entering main loop       */
+    void               *arg;            /* user data pointer                                       */
+    LIBDHCP_Error_Handler eh;
+} LIBDHCP_Control;
+
+typedef enum libdhcp_capability_e
+{/* DHCP client "capabilities" */ 
+    DHCP_USE_LEASE_DATABASE   = 1,  	/* use / do not use persistent lease database files */
+    DHCP_USE_PID_FILE         = 2,  	/* use / do not use pid file                        */
+ /*
+  * DHCPv6 supports these capabilities in process, 
+  * while the DHCPv4 client will fork and exec the dhclient-script to implement them if these
+  * bits are set - otherwise, if no bits are set, the callback is called and the script is 
+  * not run.
+  */
+    DHCP_CONFIGURE_INTERFACES = 4,  	/* configure interfaces UP/DOWN as required         */
+    DHCP_CONFIGURE_ADDRESSES  = 8,  	/* configure interface addresses as required        */
+    DHCP_CONFIGURE_ROUTES     =16,  	/* configure routes as required                     */
+    DHCP_CONFIGURE_RESOLVER   =32,  	/* configure resolv.conf as required                */
+    /* DHCPv6 only: */
+    DHCP_CONFIGURE_RADVD      =64,  	/* configure radvd.conf & restart radvd as required */
+} LIBDHCP_Capability;
+
+#endif
--- dhcp-3.0.5/Makefile.dist.libdhcp4client	2004-06-10 13:59:10.000000000 -0400
+++ dhcp-3.0.5/Makefile.dist	2007-02-04 14:25:28.000000000 -0500
@@ -22,7 +22,7 @@
 #   http://www.isc.org/
 
 
-SUBDIRS=	common $(MINIRES) dst omapip server client relay dhcpctl
+SUBDIRS=	common $(MINIRES) dst omapip server client relay dhcpctl libdhcp4client
 
 all:
 	@for dir in ${SUBDIRS}; do \