1 /*
2 * fake library for ssh
3 *
4 * This file includes getnameinfo().
5 * These funtions are defined in rfc2133.
6 *
7 * But these functions are not implemented correctly. The minimum subset
8 * is implemented for ssh use only. For exapmle, this routine assumes
9 * that ai_family is AF_INET. Don't use it for another purpose.
10 */
11
12 #include "includes.h"
13 #include "ssh.h"
14
15 RCSID("$Id: fake-getnameinfo.c,v 1.2 2001/02/09 01:55:36 djm Exp $");
16
17 #pragma ident "%Z%%M% %I% %E% SMI"
18
19 #ifndef HAVE_GETNAMEINFO
getnameinfo(const struct sockaddr * sa,size_t salen,char * host,size_t hostlen,char * serv,size_t servlen,int flags)20 int getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
21 size_t hostlen, char *serv, size_t servlen, int flags)
22 {
23 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
24 struct hostent *hp;
25 char tmpserv[16];
26
27 if (serv) {
28 snprintf(tmpserv, sizeof(tmpserv), "%d", ntohs(sin->sin_port));
29 if (strlen(tmpserv) >= servlen)
30 return EAI_MEMORY;
31 else
32 strcpy(serv, tmpserv);
33 }
34
35 if (host) {
36 if (flags & NI_NUMERICHOST) {
37 if (strlen(inet_ntoa(sin->sin_addr)) >= hostlen)
38 return EAI_MEMORY;
39
40 strcpy(host, inet_ntoa(sin->sin_addr));
41 return 0;
42 } else {
43 hp = gethostbyaddr((char *)&sin->sin_addr,
44 sizeof(struct in_addr), AF_INET);
45 if (hp == NULL)
46 return EAI_NODATA;
47
48 if (strlen(hp->h_name) >= hostlen)
49 return EAI_MEMORY;
50
51 strcpy(host, hp->h_name);
52 return 0;
53 }
54 }
55 return 0;
56 }
57 #endif /* !HAVE_GETNAMEINFO */
58