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/*
* 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.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include "config.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) {
snprintf(tmpserv, sizeof(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;
strcpy(host, inet_ntoa(sin->sin_addr));
return 0;
} else {
hp = gethostbyaddr((char *)&sin->sin_addr,
sizeof(struct in_addr), AF_INET);
if (hp == NULL)
return EAI_NODATA;
if (strlen(hp->h_name) > hostlen)
return EAI_MEMORY;
strcpy(host, hp->h_name);
return 0;
}
}
return 0;
}
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