[openssh.git] / openbsd-compat / fake-getnameinfo.c

/*
 * 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 "includes.h"
#include "ssh.h"

RCSID("$Id$");

#ifndef HAVE_GETNAMEINFO
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;
}
#endif /* !HAVE_GETNAMEINFO */
Commit	Line	Data
48e671d5	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.
48e671d5	10	*/
	11
	12	#include "includes.h"
	13	#include "ssh.h"
	14
0b202697	15	RCSID("$Id$");
0b202697	16
48e671d5	17	#ifndef HAVE_GETNAMEINFO
5daf7064	18	int getnameinfo(const struct sockaddr sa, size_t salen, char host,
5daf7064	19	size_t hostlen, char *serv, size_t servlen, int flags)
48e671d5	20	{
5daf7064	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));
6f2e751d	27	if (strlen(tmpserv) >= servlen)
5daf7064	28	return EAI_MEMORY;
5daf7064	29	else
2c153a6c	30	strcpy(serv, tmpserv);
48e671d5	31	}
5daf7064	32
	33	if (host) {
	34	if (flags & NI_NUMERICHOST) {
c5ae7384	35	if (strlen(inet_ntoa(sin->sin_addr)) >= hostlen)
5daf7064	36	return EAI_MEMORY;
5daf7064	37
2c153a6c	38	strcpy(host, inet_ntoa(sin->sin_addr));
5daf7064	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
c5ae7384	46	if (strlen(hp->h_name) >= hostlen)
5daf7064	47	return EAI_MEMORY;
5daf7064	48
2c153a6c	49	strcpy(host, hp->h_name);
5daf7064	50	return 0;
	51	}
	52	}
	53	return 0;
48e671d5	54	}
48e671d5	55	#endif /* !HAVE_GETNAMEINFO */