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Member "scanssh-2.1/getnameinfo.c" (31 Mar 2004, 1261 Bytes) of package /linux/privat/old/scanssh-2.1.tar.gz:
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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 <sys/types.h>
13 #include <sys/socket.h>
14 #include <netdb.h>
15
16 #include "config.h"
17
18 int getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
19 size_t hostlen, char *serv, size_t servlen, int flags)
20 {
21 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
22 struct hostent *hp;
23 char tmpserv[16];
24
25 if (serv) {
26 snprintf(tmpserv, sizeof(tmpserv), "%d", ntohs(sin->sin_port));
27 if (strlen(tmpserv) > servlen)
28 return EAI_MEMORY;
29 else
30 strcpy(serv, tmpserv);
31 }
32
33 if (host) {
34 if (flags & NI_NUMERICHOST) {
35 if (strlen(inet_ntoa(sin->sin_addr)) > hostlen)
36 return EAI_MEMORY;
37
38 strcpy(host, inet_ntoa(sin->sin_addr));
39 return 0;
40 } else {
41 hp = gethostbyaddr((char *)&sin->sin_addr,
42 sizeof(struct in_addr), AF_INET);
43 if (hp == NULL)
44 return EAI_NODATA;
45
46 if (strlen(hp->h_name) > hostlen)
47 return EAI_MEMORY;
48
49 strcpy(host, hp->h_name);
50 return 0;
51 }
52 }
53 return 0;
54 }