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/* Copyright 2010,2011,2013 NORDUnet A/S. All rights reserved.
See LICENSE for licensing information. */
#if defined HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <radius/client.h>
#include <event2/bufferevent.h>
#include <radsec/radsec.h>
#include <radsec/radsec-impl.h>
#include "conn.h"
#include "debug.h"
#include "message.h"
#if defined (DEBUG)
#include <netdb.h>
#include <sys/socket.h>
#include <event2/buffer.h>
#endif
int
message_verify_response (struct rs_connection *conn,
struct rs_message *response,
struct rs_message *request)
{
int err;
assert (conn);
assert (conn->active_peer);
assert (conn->active_peer->secret);
assert (response);
assert (response->rpkt);
assert (request);
assert (request->rpkt);
response->rpkt->secret = conn->active_peer->secret;
response->rpkt->sizeof_secret = strlen (conn->active_peer->secret);
/* Verify header and message authenticator. */
err = nr_packet_verify (response->rpkt, request->rpkt);
if (err)
{
if (conn->state == RS_CONN_STATE_CONNECTED)
rs_conn_disconnect(conn);
return rs_err_conn_push_fl (conn, -err, __FILE__, __LINE__,
"nr_packet_verify");
}
/* Decode and decrypt. */
err = nr_packet_decode (response->rpkt, request->rpkt);
if (err)
{
if (conn->state == RS_CONN_STATE_CONNECTED)
rs_conn_disconnect(conn);
return rs_err_conn_push_fl (conn, -err, __FILE__, __LINE__,
"nr_packet_decode");
}
return RSE_OK;
}
/* Badly named function for preparing a RADIUS message and queue it.
FIXME: Rename. */
int
message_do_send (struct rs_message *msg)
{
int err;
assert (msg);
assert (msg->conn);
assert (msg->conn->active_peer);
assert (msg->conn->active_peer->secret);
assert (msg->rpkt);
msg->rpkt->secret = msg->conn->active_peer->secret;
msg->rpkt->sizeof_secret = strlen (msg->rpkt->secret);
/* Encode message. */
err = nr_packet_encode (msg->rpkt, NULL);
if (err < 0)
return rs_err_conn_push_fl (msg->conn, -err, __FILE__, __LINE__,
"nr_packet_encode");
/* Sign message. */
err = nr_packet_sign (msg->rpkt, NULL);
if (err < 0)
return rs_err_conn_push_fl (msg->conn, -err, __FILE__, __LINE__,
"nr_packet_sign");
#if defined (DEBUG)
if (msg->conn->active_peer->addr_cache)
{
char host[80], serv[80];
getnameinfo (msg->conn->active_peer->addr_cache->ai_addr,
msg->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_message (msg);
}
#endif
/* Put message in output buffer. */
if (msg->conn->base_.bev) /* TCP. */
{
int err = bufferevent_write (msg->conn->base_.bev, msg->rpkt->data,
msg->rpkt->length);
if (err < 0)
return rs_err_conn_push_fl (msg->conn, RSE_EVENT, __FILE__, __LINE__,
"bufferevent_write: %s",
evutil_gai_strerror (err));
}
else /* UDP. */
{
struct rs_message **pp = &msg->conn->out_queue;
while (*pp && (*pp)->next)
*pp = (*pp)->next;
*pp = msg;
}
return RSE_OK;
}
/* Public functions. */
int
rs_message_create (struct rs_connection *conn, struct rs_message **msg_out)
{
struct rs_message *p;
RADIUS_PACKET *rpkt;
int err;
*msg_out = NULL;
rpkt = rs_malloc (conn->base_.ctx, sizeof(*rpkt) + RS_MAX_PACKET_LEN);
if (rpkt == NULL)
return rs_err_conn_push (conn, RSE_NOMEM, __func__);
err = nr_packet_init (rpkt, NULL, NULL,
PW_ACCESS_REQUEST,
rpkt + 1, RS_MAX_PACKET_LEN);
if (err < 0)
return rs_err_conn_push (conn, -err, __func__);
p = (struct rs_message *) rs_calloc (conn->base_.ctx, 1, sizeof (*p));
if (p == NULL)
{
rs_free (conn->base_.ctx, rpkt);
return rs_err_conn_push (conn, RSE_NOMEM, __func__);
}
p->conn = conn;
p->rpkt = rpkt;
*msg_out = p;
return RSE_OK;
}
int
rs_message_create_authn_request (struct rs_connection *conn,
struct rs_message **msg_out,
const char *user_name,
const char *user_pw)
{
struct rs_message *msg;
int err;
if (rs_message_create (conn, msg_out))
return -1;
msg = *msg_out;
msg->rpkt->code = PW_ACCESS_REQUEST;
if (user_name)
{
/* FIXME: use new rs_message_add_avp() */
err = rs_message_append_avp (msg, PW_USER_NAME, 0, user_name, 0);
if (err)
return err;
}
if (user_pw)
{
/* FIXME: msg->rpkt->secret = secret;
FIXME: use new rs_message_add_avp() */
msg->rpkt->secret = "sikrit"; /* FIXME */
err = rs_message_append_avp (msg, PW_USER_PASSWORD, 0, user_pw, 0);
if (err)
return err;
}
return RSE_OK;
}
void
rs_message_destroy (struct rs_message *msg)
{
assert (msg);
assert (msg->conn);
assert (msg->conn->base_.ctx);
rs_avp_free (&msg->rpkt->vps);
rs_free (msg->conn->base_.ctx, msg->rpkt);
rs_free (msg->conn->base_.ctx, msg);
}
int
rs_message_append_avp (struct rs_message *msg,
unsigned int attr, unsigned int vendor,
const void *data, size_t data_len)
{
const DICT_ATTR *da;
int err;
assert (msg);
da = nr_dict_attr_byvalue (attr, vendor);
if (da == NULL)
return RSE_ATTR_TYPE_UNKNOWN;
err = nr_packet_attr_append (msg->rpkt, NULL, da, data, data_len);
if (err < 0)
return rs_err_conn_push (msg->conn, -err, __func__);
return RSE_OK;
}
void
rs_message_avps (struct rs_message *msg, rs_avp ***vps)
{
assert (msg);
*vps = &msg->rpkt->vps;
}
unsigned int
rs_message_code (struct rs_message *msg)
{
assert (msg);
return msg->rpkt->code;
}
rs_const_avp *
rs_message_find_avp (struct rs_message *msg, unsigned int attr, unsigned int vendor)
{
assert (msg);
return rs_avp_find_const (msg->rpkt->vps, attr, vendor);
}
int
rs_message_set_id (struct rs_message *msg, int id)
{
int old = msg->rpkt->id;
msg->rpkt->id = id;
return old;
}
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