1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
/*
* Mar 8, 2000 by Hajimu UMEMOTO <ume@mahoroba.org>
* $Id: getnameinfo.c,v 1.3 2000/03/09 19:31:23 ume Exp $
*
* This module is besed on ssh-1.2.27-IPv6-1.5 written by
* KIKUCHI Takahiro <kick@kyoto.wide.ad.jp>
*/
/*
* fake library for ssh
*
* This file includes getnameinfo().
* These funtions are defined in rfc2133.
*
* But these functions are not implemented correctly. The minimum subset
* is implemented for ssh use only. For exapmle, this routine assumes
* that ai_family is AF_INET. Don't use it for another purpose.
*
* In the case not using 'configure --enable-ipv6', this getnameinfo.c
* will be used if you have broken getnameinfo or no getnameinfo.
*/
#include <string.h>
#include "gai.h"
int
getnameinfo(const struct sockaddr *sa, size_t salen,
char *host, size_t hostlen, char *serv, size_t servlen, int flags)
{
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
struct hostent *hp;
char tmpserv[16];
if (serv) {
sprintf(tmpserv, "%d", ntohs(sin->sin_port));
if (strlen(tmpserv) > servlen)
return EAI_MEMORY;
else
strcpy(serv, tmpserv);
}
if (host)
if (flags & NI_NUMERICHOST)
if (strlen(inet_ntoa(sin->sin_addr)) > hostlen)
return EAI_MEMORY;
else {
strcpy(host, inet_ntoa(sin->sin_addr));
return 0;
}
else
if (hp = gethostbyaddr((char *)&sin->sin_addr,
sizeof(struct in_addr), AF_INET))
if (strlen(hp->h_name) > hostlen)
return EAI_MEMORY;
else {
strcpy(host, hp->h_name);
return 0;
}
else
return EAI_NODATA;
return 0;
}
|
