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/*
** ident.c High-level calls to the ident lib
**
** Author: Pr Emanuelsson <pell@lysator.liu.se>
*/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/time.h>
#include "ident.h"
#if defined(AIX_PS2) || defined(ultrix)
extern char *strdup(char *);
#endif
/* Do a complete ident query and return result */
IDENT *ident_lookup
#ifdef __STDC__
(int fd,
int timeout)
#else
(fd, timeout)
int fd; int timeout;
#endif
{
struct sockaddr_in localaddr, remoteaddr;
int len, res;
ident_t *id;
struct timeval timout;
IDENT *ident=0;
len = sizeof(remoteaddr);
if (getpeername(fd, (struct sockaddr *)&remoteaddr, &len) < 0)
return 0;
len = sizeof(localaddr);
if (getsockname(fd, (struct sockaddr *)&localaddr, &len) < 0)
return 0;
timout.tv_sec = timeout; timout.tv_usec = 0;
if (timeout)
id = id_open(&localaddr.sin_addr, &remoteaddr.sin_addr, &timout);
else
id = id_open(&localaddr.sin_addr, &remoteaddr.sin_addr, (struct timeval *)0);
if (!id) {
errno = EINVAL;
return 0;
}
if (timeout)
res = id_query(id,
ntohs(remoteaddr.sin_port),
ntohs(localaddr.sin_port),
&timout);
else
res = id_query(id,
ntohs(remoteaddr.sin_port),
ntohs(localaddr.sin_port),
(struct timeval *) 0);
if (res < 0) {
id_close(id);
return 0;
}
ident = (IDENT *) malloc(sizeof(IDENT));
if (!ident) {
id_close(id);
return 0;
}
if (timeout)
res = id_parse(id, &timout,
&ident->lport,
&ident->fport,
&ident->identifier,
&ident->opsys,
&ident->charset);
else
res = id_parse(id, (struct timeval *) 0,
&ident->lport,
&ident->fport,
&ident->identifier,
&ident->opsys,
&ident->charset);
if (res != 1) {
free(ident);
id_close(id);
return 0;
}
id_close(id);
return ident; /* At last! */
}
char *ident_id
#ifdef __STDC__
(int fd,
int timeout)
#else
(fd, timeout)
int fd; int timeout;
#endif
{
IDENT *ident;
char *id=0;
ident = ident_lookup(fd, timeout);
if (ident && ident->identifier && *ident->identifier)
id = strdup(ident->identifier);
ident_free(ident);
return id;
}
void ident_free
#ifdef __STDC__
(IDENT *id)
#else
(id)
IDENT *id;
#endif
{
if (!id) return;
if (id->identifier) free(id->identifier);
if (id->opsys) free(id->opsys);
if (id->charset) free(id->charset);
free(id);
}
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