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/*
** ident.c High-level calls to the ident lib
**
** Author: Pr Emanuelsson <pell@lysator.liu.se>
** Hacked by: Peter Eriksson <pen@lysator.liu.se>
** Updated by: Rmi Denis-Courmont <rdenis@simphalempin.com>
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#if HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#define IN_LIBIDENT_SRC
#include "ident.h"
/* Do a complete ident query and return result */
IDENT *ident_lookup (int fd, int timeout)
{
struct sockaddr_storage localaddr, remoteaddr;
int len;
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;
return ident_query_addr((struct sockaddr *)&localaddr,
(struct sockaddr *)&remoteaddr, timeout);
}
IDENT *ident_query (const struct in_addr *laddr, const struct in_addr *faddr,
int lport, int rport, int timeout)
{
struct sockaddr_in lsockaddr, fsockaddr;
memset(&lsockaddr, 0, sizeof(lsockaddr));
lsockaddr.sin_family = AF_INET;
#if HAVE_SA_LEN
lsockaddr.sin_len = sizeof(lsockaddr);
#endif
lsockaddr.sin_addr.s_addr = laddr->s_addr;
lsockaddr.sin_port = lport;
memcpy(&fsockaddr, &lsockaddr, sizeof(fsockaddr));
fsockaddr.sin_addr.s_addr = faddr->s_addr;
fsockaddr.sin_port = rport;
return ident_query_addr((struct sockaddr *)&lsockaddr,
(struct sockaddr *)&fsockaddr, timeout);
}
IDENT *ident_query_addr (const struct sockaddr *laddr,
const struct sockaddr *raddr, int timeout)
{
int res, lport, rport;
ident_t *id;
struct timeval timout;
IDENT *ident = NULL;
switch (laddr->sa_family)
{
case AF_INET:
/* We assume that both addresses are in the same family. */
lport = ntohs(((struct sockaddr_in *)laddr)->sin_port);
rport = ntohs(((struct sockaddr_in *)raddr)->sin_port);
break;
#ifdef AF_INET6
case AF_INET6:
lport = ntohs(((struct sockaddr_in6 *)laddr)->sin6_port);
rport = ntohs(((struct sockaddr_in6 *)raddr)->sin6_port);
break;
#endif
default:
return NULL;
}
timout.tv_sec = timeout;
timout.tv_usec = 0;
id = id_open_addr(laddr, raddr, (timeout) ? &timout : NULL);
if (id == NULL)
{
errno = EINVAL;
return NULL;
}
if (timeout)
res = id_query(id, rport, lport, &timout);
else
res = id_query(id, rport, lport, (struct timeval *) 0);
if (res < 0)
{
id_close(id);
return NULL;
}
ident = (IDENT *) malloc(sizeof(IDENT));
if (ident == NULL) {
id_close(id);
return NULL;
}
res = id_parse(id, (timeout) ? &timout : NULL, &ident->lport,
&ident->fport, &ident->identifier, &ident->opsys,
&ident->charset);
if (res != 1)
{
free(ident);
id_close(id);
return NULL;
}
id_close(id);
return ident; /* At last! */
}
char *ident_id (int fd, int timeout)
{
IDENT *ident;
char *id = NULL;
ident = ident_lookup(fd, timeout);
if (ident && ident->identifier && *ident->identifier)
{
id = id_strdup(ident->identifier);
if (id == NULL)
return NULL;
}
ident_free(ident);
return id;
}
void ident_free (IDENT * id)
{
if (id != NULL)
{
if (id->identifier)
free(id->identifier);
if (id->opsys)
free(id->opsys);
if (id->charset)
free(id->charset);
free(id);
}
}
const char *id_version = PACKAGE_VERSION;
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