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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 <stdint.h>
#include <stdlib.h>
#include <assert.h>
#include <sys/time.h>
#include <event2/event.h>
#include <radsec/radsec.h>
#include <radsec/radsec-impl.h>
#include <radsec/request.h>
#include <radsec/request-impl.h>
#include <freeradius/libradius.h>
#include "debug.h"
#include "conn.h"
#include "tcp.h"
/* RFC 5080 2.2.1. Retransmission Behavior. */
#define IRT 2
#define MRC 5
#define MRT 16
#define MRD 30
#define RAND 100 /* Rand factor, milliseconds. */
int
rs_request_create (struct rs_connection *conn, struct rs_request **req_out)
{
struct rs_request *req = rs_malloc (conn->ctx, sizeof(*req));
assert (req_out);
if (!req)
return rs_err_conn_push_fl (conn, RSE_NOMEM, __FILE__, __LINE__, NULL);
memset (req, 0, sizeof(*req));
req->conn = conn;
*req_out = req;
return RSE_OK;
}
void
rs_request_add_reqpkt (struct rs_request *req, struct rs_packet *reqpkt)
{
assert (req);
req->req_msg = reqpkt;
}
int
rs_request_create_authn (struct rs_connection *conn,
struct rs_request **req_out,
const char *user_name,
const char *user_pw)
{
struct rs_request *req;
assert (req_out);
if (rs_request_create (conn, &req))
return -1;
if (rs_packet_create_authn_request (conn, &req->req_msg, user_name, user_pw))
return -1;
*req_out = req;
return RSE_OK;
}
void
rs_request_destroy (struct rs_request *request)
{
assert (request);
rs_packet_destroy (request->req_msg);
rs_packet_destroy (request->resp_msg);
rs_free (request->conn->ctx, request);
}
static void
_rand_rt (struct timeval *res, uint32_t rtprev, uint32_t factor)
{
uint32_t ms = rtprev * (fr_rand () % factor);
res->tv_sec = rtprev + ms / 1000;
res->tv_usec = (ms % 1000) * 1000;
}
int
rs_request_send (struct rs_request *request, struct rs_packet **resp_msg)
{
int r = 0;
struct rs_connection *conn = NULL;
int count = 0;
struct timeval rt = {0,0};
struct timeval end = {0,0};
struct timeval now = {0,0};
struct timeval tmp_tv = {0,0};
struct timeval mrt_tv = {MRT,0};
if (!request || !request->conn || !request->req_msg || !resp_msg)
return rs_err_conn_push_fl (conn, RSE_INVAL, __FILE__, __LINE__, NULL);
conn = request->conn;
assert (!conn_user_dispatch_p (conn)); /* This function is high level. */
gettimeofday (&end, NULL);
end.tv_sec += MRD;
_rand_rt (&rt, IRT, RAND);
while (1)
{
rs_conn_set_timeout (conn, &rt);
r = rs_packet_send (request->req_msg, NULL);
if (r == RSE_OK)
{
r = rs_conn_receive_packet (request->conn,
request->req_msg,
resp_msg);
if (r == RSE_OK)
break; /* Success. */
/* Timing out on receiving data or reconnecting a broken TCP
connection is ok. */
if (r != RSE_TIMEOUT_CONN && r != RSE_TIMEOUT_IO)
break; /* Error. */
}
else if (r != RSE_TIMEOUT_CONN) /* Timeout on TCP connect is ok. */
break; /* Error. */
gettimeofday (&now, NULL);
if (++count > MRC || timercmp (&now, &end, >))
{
r = RSE_TIMEOUT;
break; /* Timeout. */
}
/* rt = 2 * rt + _rand_rt (rt, RAND); */
timeradd (&rt, &rt, &rt); /* rt = 2 * rt */
_rand_rt (&tmp_tv, IRT, RAND);
timeradd (&rt, &tmp_tv, &rt);
if (timercmp (&rt, &mrt_tv, >))
_rand_rt (&rt, MRT, RAND);
}
rs_debug (("%s: returning %d\n", __func__, r));
return r;
}
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