3 * ===================================
4 * HARP | Host ATM Research Platform
5 * ===================================
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.
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.
21 * Copyright 1994-1998 Network Computing Services, Inc.
23 * Copies of this Software may be made, however, the above copyright
24 * notice must be reproduced on all copies.
26 * @(#) $FreeBSD: src/lib/libatm/ip_addr.c,v 1.3.2.1 2001/09/28 16:52:10 dillon Exp $
27 * @(#) $DragonFly: src/lib/libatm/ip_addr.c,v 1.3 2004/09/23 20:20:59 geekgod Exp $
31 #include <sys/cdefs.h>
34 * User Space Library Functions
35 * ----------------------------
37 * IP address utilities
41 #include <sys/types.h>
42 #include <sys/param.h>
43 #include <sys/socket.h>
45 #include <netinet/in.h>
46 #include <arpa/inet.h>
47 #include <netatm/port.h>
48 #include <netatm/atm.h>
49 #include <netatm/atm_if.h>
50 #include <netatm/atm_sap.h>
51 #include <netatm/atm_sys.h>
52 #include <netatm/atm_ioctl.h>
62 * Return an IP address in a socket address structure, given a character
63 * string with a domain name or a dotted decimal number.
66 * p pointer to a host name or IP address
69 * null error was encountered
70 * struct sockaddr_in * a pointer to a socket address with the
71 * requested IP address
78 struct hostent
*ip_host
;
79 static struct sockaddr_in sin
;
82 * Get IP address of specified host name
84 UM_ZERO(&sin
, sizeof(sin
));
85 sin
.sin_family
= AF_INET
;
86 if (p
[0] >= '0' && p
[0] <= '9') {
88 * IP address is in dotted decimal format
90 if ((sin
.sin_addr
.s_addr
= inet_addr(p
)) == -1) {
91 return((struct sockaddr_in
*)0);
95 * Host name is in domain name system format
97 ip_host
= gethostbyname(p
);
99 ip_host
->h_addrtype
!= AF_INET
) {
100 return((struct sockaddr_in
*)0);
102 sin
.sin_addr
.s_addr
= *(u_long
*)ip_host
->h_addr_list
[0];
109 * Format an IP address
111 * Return a text-formatted string with an IP address and domain name
112 * given a sockaddr_in with an IP address.
115 * p pointer to sockaddr_in with an IP address
118 * char * pointer to a text-formatted string
123 struct in_addr
*addr
;
125 static char host_name
[MAXHOSTNAMELEN
+ 18];
127 struct hostent
*ip_host
;
132 UM_ZERO(host_name
, sizeof(host_name
));
135 * Check for a zero address
137 if (!addr
|| addr
->s_addr
== 0) {
142 * Get address in dotted decimal format
144 ip_num
= inet_ntoa(*addr
);
147 * Look up name in DNS
149 ip_host
= gethostbyaddr((char *)addr
, sizeof(addr
), AF_INET
);
150 if (ip_host
&& ip_host
->h_name
&&
151 strlen(ip_host
->h_name
)) {
153 * Return host name followed by dotted decimal address
155 snprintf(host_name
, sizeof(host_name
), "%s (%s)",
156 ip_host
->h_name
, ip_num
);
160 * No host name -- just return dotted decimal address