[dragonfly.git] / lib / libatm / ip_addr.c

/*
 *
 * ===================================
 * HARP  |  Host ATM Research Platform
 * ===================================
 *
 *
 * This Host ATM Research Platform ("HARP") file (the "Software") is
 * made available by Network Computing Services, Inc. ("NetworkCS")
 * "AS IS".  NetworkCS does not provide maintenance, improvements or
 * support of any kind.
 *
 * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
 * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
 * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
 * In no event shall NetworkCS be responsible for any damages, including
 * but not limited to consequential damages, arising from or relating to
 * any use of the Software or related support.
 *
 * Copyright 1994-1998 Network Computing Services, Inc.
 *
 * Copies of this Software may be made, however, the above copyright
 * notice must be reproduced on all copies.
 *
 *	@(#) $FreeBSD: src/lib/libatm/ip_addr.c,v 1.3.2.1 2001/09/28 16:52:10 dillon Exp $
 *
 */

/*
 * User Space Library Functions
 * ----------------------------
 *
 * IP address utilities
 *
 */

#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netatm/port.h>
#include <netatm/atm.h>
#include <netatm/atm_if.h>
#include <netatm/atm_sap.h>
#include <netatm/atm_sys.h>
#include <netatm/atm_ioctl.h>

#include <netdb.h>
#include <stdio.h>
#include <string.h>

#include "libatm.h"

/*
 * Get IP address
 *
 * Return an IP address in a socket address structure, given a character
 * string with a domain name or a dotted decimal number.
 * 
 * Arguments:
 *	p	pointer to a host name or IP address
 *
 * Returns:
 *	null			error was encountered
 *	struct sockaddr_in *	a pointer to a socket address with the
 *				requested IP address
 *
 */
struct sockaddr_in *
get_ip_addr(char *p)
{
	struct hostent			*ip_host;
	static struct sockaddr_in	sin;

	/*
	 * Get IP address of specified host name
	 */
	UM_ZERO(&sin, sizeof(sin));
	sin.sin_family = AF_INET;
	if (p[0] >= '0' && p[0] <= '9') {
		/*
		 * IP address is in dotted decimal format
		 */
		if ((sin.sin_addr.s_addr = inet_addr(p)) == -1) {
			return(NULL);
		}
	} else {
		/*
		 * Host name is in domain name system format
		 */
		ip_host = gethostbyname(p);
		if (!ip_host ||
				ip_host->h_addrtype != AF_INET) {
			return(NULL);
		}
		sin.sin_addr.s_addr = *(u_long *)ip_host->h_addr_list[0];
	}
	return(&sin);
}


/*
 * Format an IP address
 *
 * Return a text-formatted string with an IP address and domain name
 * given a sockaddr_in with an IP address.
 * 
 * Arguments:
 *	p	pointer to sockaddr_in with an IP address
 *
 * Returns:
 *	char *	pointer to a text-formatted string
 *
 */
char *
format_ip_addr(struct in_addr *addr)
{
	static char	host_name[MAXHOSTNAMELEN + 18];
	char		*ip_num;
	struct hostent	*ip_host;

	/*
	 * Initialize
	 */
	UM_ZERO(host_name, sizeof(host_name));

	/*
	 * Check for a zero address
	 */
	if (!addr || addr->s_addr == 0) {
		return("-");
	}

	/*
	 * Get address in dotted decimal format
	 */
	ip_num = inet_ntoa(*addr);

	/*
	 * Look up name in DNS
	 */
	ip_host = gethostbyaddr(addr, sizeof(addr), AF_INET);
	if (ip_host && ip_host->h_name &&
			strlen(ip_host->h_name)) {
		/*
		 * Return host name followed by dotted decimal address
		 */
		snprintf(host_name, sizeof(host_name), "%s (%s)",
			ip_host->h_name, ip_num);
		return (host_name);
	} else {
		/*
		 * No host name -- just return dotted decimal address
		 */
		return(ip_num);
	}
}
Commit	Line	Data
984263bc MD	1	/*
	2	*
	3	* ===================================
	4	* HARP \| Host ATM Research Platform
	5	* ===================================
	6	*
	7	*
	8	* This Host ATM Research Platform ("HARP") file (the "Software") is
	9	* made available by Network Computing Services, Inc. ("NetworkCS")
	10	* "AS IS". NetworkCS does not provide maintenance, improvements or
	11	* support of any kind.
	12	*
	13	* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
	14	* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
	15	* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
	16	* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
	17	* In no event shall NetworkCS be responsible for any damages, including
	18	* but not limited to consequential damages, arising from or relating to
	19	* any use of the Software or related support.
	20	*
	21	* Copyright 1994-1998 Network Computing Services, Inc.
	22	*
	23	* Copies of this Software may be made, however, the above copyright
	24	* notice must be reproduced on all copies.
	25	*
	26	* @(#) $FreeBSD: src/lib/libatm/ip_addr.c,v 1.3.2.1 2001/09/28 16:52:10 dillon Exp $
	27	*
	28	*/
	29
984263bc MD	30	/*
	31	* User Space Library Functions
	32	* ----------------------------
	33	*
	34	* IP address utilities
	35	*
	36	*/
	37
	38	#include <sys/types.h>
	39	#include <sys/param.h>
	40	#include <sys/socket.h>
	41	#include <net/if.h>
	42	#include <netinet/in.h>
	43	#include <arpa/inet.h>
	44	#include <netatm/port.h>
	45	#include <netatm/atm.h>
	46	#include <netatm/atm_if.h>
	47	#include <netatm/atm_sap.h>
	48	#include <netatm/atm_sys.h>
	49	#include <netatm/atm_ioctl.h>
	50
	51	#include <netdb.h>
7bc7e232	52	#include <stdio.h>
984263bc MD	53	#include <string.h>
	54
	55	#include "libatm.h"
	56
	57	/*
	58	* Get IP address
	59	*
	60	* Return an IP address in a socket address structure, given a character
	61	* string with a domain name or a dotted decimal number.
	62	*
	63	* Arguments:
	64	* p pointer to a host name or IP address
	65	*
	66	* Returns:
	67	* null error was encountered
	68	* struct sockaddr_in * a pointer to a socket address with the
	69	* requested IP address
	70	*
	71	*/
	72	struct sockaddr_in *
d797dc5d	73	get_ip_addr(char *p)
984263bc MD	74	{
	75	struct hostent *ip_host;
	76	static struct sockaddr_in sin;
	77
	78	/*
	79	* Get IP address of specified host name
	80	*/
	81	UM_ZERO(&sin, sizeof(sin));
	82	sin.sin_family = AF_INET;
	83	if (p[0] >= '0' && p[0] <= '9') {
	84	/*
	85	* IP address is in dotted decimal format
	86	*/
	87	if ((sin.sin_addr.s_addr = inet_addr(p)) == -1) {
60233e58	88	return(NULL);
984263bc MD	89	}
	90	} else {
	91	/*
	92	* Host name is in domain name system format
	93	*/
	94	ip_host = gethostbyname(p);
	95	if (!ip_host \|\|
	96	ip_host->h_addrtype != AF_INET) {
60233e58	97	return(NULL);
984263bc MD	98	}
	99	sin.sin_addr.s_addr = (u_long )ip_host->h_addr_list[0];
	100	}
	101	return(&sin);
	102	}
	103
	104
	105	/*
	106	* Format an IP address
	107	*
	108	* Return a text-formatted string with an IP address and domain name
	109	* given a sockaddr_in with an IP address.
	110	*
	111	* Arguments:
	112	* p pointer to sockaddr_in with an IP address
	113	*
	114	* Returns:
	115	* char * pointer to a text-formatted string
	116	*
	117	*/
	118	char *
d797dc5d	119	format_ip_addr(struct in_addr *addr)
984263bc	120	{
f2c0a431	121	static char host_name[MAXHOSTNAMELEN + 18];
984263bc MD	122	char *ip_num;
	123	struct hostent *ip_host;
	124
	125	/*
	126	* Initialize
	127	*/
	128	UM_ZERO(host_name, sizeof(host_name));
	129
	130	/*
	131	* Check for a zero address
	132	*/
	133	if (!addr \|\| addr->s_addr == 0) {
	134	return("-");
	135	}
	136
	137	/*
	138	* Get address in dotted decimal format
	139	*/
	140	ip_num = inet_ntoa(*addr);
	141
	142	/*
	143	* Look up name in DNS
	144	*/
15b85273	145	ip_host = gethostbyaddr(addr, sizeof(addr), AF_INET);
984263bc MD	146	if (ip_host && ip_host->h_name &&
	147	strlen(ip_host->h_name)) {
	148	/*
	149	* Return host name followed by dotted decimal address
	150	*/
f2c0a431 SU	151	snprintf(host_name, sizeof(host_name), "%s (%s)",
	152	ip_host->h_name, ip_num);
	153	return (host_name);
984263bc MD	154	} else {
	155	/*
	156	* No host name -- just return dotted decimal address
	157	*/
	158	return(ip_num);
	159	}
	160	}