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/* Copyright 2010, 2011 NORDUnet A/S. All rights reserved.
See the file COPYING for licensing information. */
#if defined HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <event2/bufferevent.h>
#include <radsec/radsec.h>
#include <radsec/radsec-impl.h>
#include "conn.h"
#include "debug.h"
#include "packet.h"
#if defined (DEBUG)
#include <netdb.h>
#include <sys/socket.h>
#include <event2/buffer.h>
#endif
int
packet_verify_response (struct rs_connection *conn,
struct rs_packet *response,
struct rs_packet *request)
{
assert (conn);
assert (conn->active_peer);
assert (conn->active_peer->secret);
assert (response);
assert (response->rpkt);
assert (request);
assert (request->rpkt);
/* Verify header and message authenticator. */
if (rad_verify (response->rpkt, request->rpkt, conn->active_peer->secret))
{
conn_close (&conn);
return rs_err_conn_push_fl (conn, RSE_FR, __FILE__, __LINE__,
"rad_verify: %s", fr_strerror ());
}
/* Decode and decrypt. */
if (rad_decode (response->rpkt, request->rpkt, conn->active_peer->secret))
{
conn_close (&conn);
return rs_err_conn_push_fl (conn, RSE_FR, __FILE__, __LINE__,
"rad_decode: %s", fr_strerror ());
}
return RSE_OK;
}
/* Badly named function for preparing a RADIUS message and queue it.
FIXME: Rename. */
int
packet_do_send (struct rs_packet *pkt)
{
VALUE_PAIR *vp = NULL;
assert (pkt);
assert (pkt->conn);
assert (pkt->conn->active_peer);
assert (pkt->conn->active_peer->secret);
assert (pkt->rpkt);
/* Add a Message-Authenticator, RFC 2869, if not already present. */
/* FIXME: Make Message-Authenticator optional? */
vp = paircreate (PW_MESSAGE_AUTHENTICATOR, PW_TYPE_OCTETS);
if (!vp)
return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
"paircreate: %s", fr_strerror ());
pairreplace (&pkt->rpkt->vps, vp);
/* Encode message. */
if (rad_encode (pkt->rpkt, NULL, pkt->conn->active_peer->secret))
return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
"rad_encode: %s", fr_strerror ());
/* Sign message. */
if (rad_sign (pkt->rpkt, NULL, pkt->conn->active_peer->secret))
return rs_err_conn_push_fl (pkt->conn, RSE_FR, __FILE__, __LINE__,
"rad_sign: %s", fr_strerror ());
#if defined (DEBUG)
{
char host[80], serv[80];
getnameinfo (pkt->conn->active_peer->addr_cache->ai_addr,
pkt->conn->active_peer->addr_cache->ai_addrlen,
host, sizeof(host), serv, sizeof(serv),
0 /* NI_NUMERICHOST|NI_NUMERICSERV*/);
rs_debug (("%s: about to send this to %s:%s:\n", __func__, host, serv));
rs_dump_packet (pkt);
}
#endif
/* Put message in output buffer. */
if (pkt->conn->bev) /* TCP. */
{
int err = bufferevent_write (pkt->conn->bev, pkt->rpkt->data,
pkt->rpkt->data_len);
if (err < 0)
return rs_err_conn_push_fl (pkt->conn, RSE_EVENT, __FILE__, __LINE__,
"bufferevent_write: %s",
evutil_gai_strerror (err));
}
else /* UDP. */
{
struct rs_packet **pp = &pkt->conn->out_queue;
while (*pp && (*pp)->next)
*pp = (*pp)->next;
*pp = pkt;
}
return RSE_OK;
}
/* Public functions. */
int
rs_packet_create (struct rs_connection *conn, struct rs_packet **pkt_out)
{
struct rs_packet *p;
RADIUS_PACKET *rpkt;
*pkt_out = NULL;
rpkt = rad_alloc (1);
if (!rpkt)
return rs_err_conn_push (conn, RSE_NOMEM, __func__);
rpkt->id = conn->nextid++;
p = (struct rs_packet *) malloc (sizeof (struct rs_packet));
if (!p)
{
rad_free (&rpkt);
return rs_err_conn_push (conn, RSE_NOMEM, __func__);
}
memset (p, 0, sizeof (struct rs_packet));
p->conn = conn;
p->rpkt = rpkt;
*pkt_out = p;
return RSE_OK;
}
int
rs_packet_create_authn_request (struct rs_connection *conn,
struct rs_packet **pkt_out,
const char *user_name, const char *user_pw)
{
struct rs_packet *pkt;
VALUE_PAIR *vp = NULL;
if (rs_packet_create (conn, pkt_out))
return -1;
pkt = *pkt_out;
pkt->rpkt->code = PW_AUTHENTICATION_REQUEST;
if (user_name)
{
vp = pairmake ("User-Name", user_name, T_OP_EQ);
if (vp == NULL)
return rs_err_conn_push_fl (conn, RSE_FR, __FILE__, __LINE__,
"pairmake: %s", fr_strerror ());
pairadd (&pkt->rpkt->vps, vp);
}
if (user_pw)
{
vp = pairmake ("User-Password", user_pw, T_OP_EQ);
if (vp == NULL)
return rs_err_conn_push_fl (conn, RSE_FR, __FILE__, __LINE__,
"pairmake: %s", fr_strerror ());
pairadd (&pkt->rpkt->vps, vp);
}
return RSE_OK;
}
struct radius_packet *
rs_packet_frpkt (struct rs_packet *pkt)
{
assert (pkt);
return pkt->rpkt;
}
void
rs_packet_destroy (struct rs_packet *pkt)
{
assert (pkt);
assert (pkt->conn);
assert (pkt->conn->ctx);
rad_free (&pkt->rpkt); /* Note: This frees the VALUE_PAIR's too. */
rs_free (pkt->conn->ctx, pkt);
}
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