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1820df7a2d
Host ATM Research Platform (HARP), Network Computing Services, Inc. This software was developed with the support of the Defense Advanced Research Projects Agency (DARPA).
167 lines
3.7 KiB
C
167 lines
3.7 KiB
C
/*
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*
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* ===================================
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* HARP | Host ATM Research Platform
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* ===================================
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*
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*
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* This Host ATM Research Platform ("HARP") file (the "Software") is
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* made available by Network Computing Services, Inc. ("NetworkCS")
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* "AS IS". NetworkCS does not provide maintenance, improvements or
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* support of any kind.
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*
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* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
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* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
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* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
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* In no event shall NetworkCS be responsible for any damages, including
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* but not limited to consequential damages, arising from or relating to
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* any use of the Software or related support.
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*
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* Copyright 1994-1998 Network Computing Services, Inc.
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*
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* Copies of this Software may be made, however, the above copyright
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* notice must be reproduced on all copies.
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*
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* @(#) $Id: ip_addr.c,v 1.1 1998/07/09 21:45:42 johnc Exp $
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*
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*/
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/*
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* User Space Library Functions
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* ----------------------------
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*
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* IP address utilities
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*
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*/
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#ifndef lint
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static char *RCSid = "@(#) $Id: ip_addr.c,v 1.1 1998/07/09 21:45:42 johnc Exp $";
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#endif
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#include <sys/types.h>
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#include <sys/param.h>
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#include <netdb.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netatm/port.h>
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#include <netatm/atm.h>
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#include <netatm/atm_if.h>
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#include <netatm/atm_sap.h>
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#include <netatm/atm_sys.h>
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#include <netatm/atm_ioctl.h>
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#include "libatm.h"
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/*
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* Get IP address
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*
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* Return an IP address in a socket address structure, given a character
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* string with a domain name or a dotted decimal number.
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*
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* Arguments:
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* p pointer to a host name or IP address
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*
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* Returns:
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* null error was encountered
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* struct sockaddr_in * a pointer to a socket address with the
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* requested IP address
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*
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*/
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struct sockaddr_in *
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get_ip_addr(p)
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char *p;
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{
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struct hostent *ip_host;
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static struct sockaddr_in sin;
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/*
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* Get IP address of specified host name
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*/
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UM_ZERO(&sin, sizeof(sin));
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sin.sin_family = AF_INET;
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if (p[0] >= '0' && p[0] <= '9') {
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/*
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* IP address is in dotted decimal format
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*/
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if ((sin.sin_addr.s_addr = inet_addr(p)) == -1) {
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return((struct sockaddr_in *)0);
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}
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} else {
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/*
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* Host name is in domain name system format
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*/
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ip_host = gethostbyname(p);
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if (!ip_host ||
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ip_host->h_addrtype != AF_INET) {
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return((struct sockaddr_in *)0);
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}
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sin.sin_addr.s_addr = *(u_long *)ip_host->h_addr_list[0];
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}
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return(&sin);
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}
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/*
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* Format an IP address
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*
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* Return a text-formatted string with an IP address and domain name
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* given a sockaddr_in with an IP address.
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*
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* Arguments:
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* p pointer to sockaddr_in with an IP address
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*
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* Returns:
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* char * pointer to a text-formatted string
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*
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*/
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char *
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format_ip_addr(addr)
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struct in_addr *addr;
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{
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static char host_name[128];
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char *ip_num;
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struct hostent *ip_host;
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/*
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* Initialize
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*/
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UM_ZERO(host_name, sizeof(host_name));
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/*
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* Check for a zero address
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*/
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if (!addr || addr->s_addr == 0) {
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return("-");
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}
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/*
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* Get address in dotted decimal format
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*/
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ip_num = inet_ntoa(*addr);
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/*
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* Look up name in DNS
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*/
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ip_host = gethostbyaddr((char *)addr, sizeof(addr), AF_INET);
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if (ip_host && ip_host->h_name &&
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strlen(ip_host->h_name)) {
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/*
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* Return host name followed by dotted decimal address
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*/
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strcpy(host_name, ip_host->h_name);
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strcat(host_name, " (");
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strcat(host_name, ip_num);
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strcat(host_name, ")");
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return(host_name);
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} else {
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/*
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* No host name -- just return dotted decimal address
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*/
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return(ip_num);
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}
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}
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