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/*
* lib/krb5/os/genaddrs.c
*
* Copyright 1995 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* Take an IP addr & port and generate a full IP address.
*/
#define NEED_SOCKETS
#include "k5-int.h"
#include "os-proto.h"
#if !defined(_WINSOCKAPI_) && !defined(HAVE_MACSOCK_H)
#include <netinet/in.h>
#endif
#ifndef GETPEERNAME_ARG2_TYPE
#define GETPEERNAME_ARG2_TYPE struct sockaddr
#endif
#ifndef GETPEERNAME_ARG3_TYPE
#define GETPEERNAME_ARG3_TYPE size_t
#endif
#ifndef GETSOCKNAME_ARG2_TYPE
#define GETSOCKNAME_ARG2_TYPE struct sockaddr
#endif
#ifndef GETSOCKNAME_ARG3_TYPE
#define GETSOCKNAME_ARG3_TYPE size_t
#endif
struct addrpair {
krb5_address addr, port;
};
#define SET(TARG, THING, TYPE) \
((TARG).contents = (krb5_octet *) &(THING), \
(TARG).length = sizeof (THING), \
(TARG).addrtype = (TYPE))
static void *cvtaddr (struct sockaddr_storage *a, struct addrpair *ap)
{
switch (ss2sa(a)->sa_family) {
case AF_INET:
SET (ap->port, ss2sin(a)->sin_port, ADDRTYPE_IPPORT);
SET (ap->addr, ss2sin(a)->sin_addr, ADDRTYPE_INET);
return a;
#ifdef KRB5_USE_INET6
case AF_INET6:
SET (ap->port, ss2sin6(a)->sin6_port, ADDRTYPE_IPPORT);
if (IN6_IS_ADDR_V4MAPPED (&ss2sin6(a)->sin6_addr)) {
ap->addr.addrtype = ADDRTYPE_INET;
ap->addr.contents = 12 + (krb5_octet *) &ss2sin6(a)->sin6_addr;
ap->addr.length = 4;
} else
SET (ap->addr, ss2sin6(a)->sin6_addr, ADDRTYPE_INET6);
return a;
#endif
default:
return 0;
}
}
krb5_error_code KRB5_CALLCONV
krb5_auth_con_genaddrs(krb5_context context, krb5_auth_context auth_context, int infd, int flags)
{
krb5_error_code retval;
krb5_address * laddr;
krb5_address * lport;
krb5_address * raddr;
krb5_address * rport;
SOCKET fd = (SOCKET) infd;
struct addrpair laddrs, raddrs;
#ifdef HAVE_NETINET_IN_H
struct sockaddr_storage lsaddr, rsaddr;
GETSOCKNAME_ARG3_TYPE ssize;
ssize = sizeof(struct sockaddr_storage);
if ((flags & KRB5_AUTH_CONTEXT_GENERATE_LOCAL_FULL_ADDR) ||
(flags & KRB5_AUTH_CONTEXT_GENERATE_LOCAL_ADDR)) {
if ((retval = getsockname(fd, (GETSOCKNAME_ARG2_TYPE *) &lsaddr,
&ssize)))
return retval;
if (cvtaddr (&lsaddr, &laddrs)) {
laddr = &laddrs.addr;
if (flags & KRB5_AUTH_CONTEXT_GENERATE_LOCAL_FULL_ADDR)
lport = &laddrs.port;
else
lport = 0;
} else
return KRB5_PROG_ATYPE_NOSUPP;
} else {
laddr = NULL;
lport = NULL;
}
ssize = sizeof(struct sockaddr_storage);
if ((flags & KRB5_AUTH_CONTEXT_GENERATE_REMOTE_FULL_ADDR) ||
(flags & KRB5_AUTH_CONTEXT_GENERATE_REMOTE_ADDR)) {
if ((retval = getpeername(fd, (GETPEERNAME_ARG2_TYPE *) &rsaddr,
&ssize)))
return errno;
if (cvtaddr (&rsaddr, &raddrs)) {
raddr = &raddrs.addr;
if (flags & KRB5_AUTH_CONTEXT_GENERATE_REMOTE_FULL_ADDR)
rport = &raddrs.port;
else
rport = 0;
} else
return KRB5_PROG_ATYPE_NOSUPP;
} else {
raddr = NULL;
rport = NULL;
}
if (!(retval = krb5_auth_con_setaddrs(context, auth_context, laddr, raddr)))
return (krb5_auth_con_setports(context, auth_context, lport, rport));
return retval;
#else
return KRB5_PROG_ATYPE_NOSUPP;
#endif
}
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