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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include "linux_ppp.h"
#include <openssl/md5.h>
#include "log.h"
#include "radius_p.h"
#include "memdebug.h"
#define STAT_UPDATE_INTERVAL (10 * 60 * 1000)
#define INTERIM_SAFE_TIME 10
static int req_set_RA(struct rad_req_t *req, const char *secret)
{
MD5_CTX ctx;
if (rad_packet_build(req->pack, req->RA))
return -1;
MD5_Init(&ctx);
MD5_Update(&ctx, req->pack->buf, req->pack->len);
MD5_Update(&ctx, secret, strlen(secret));
MD5_Final(req->pack->buf + 4, &ctx);
return 0;
}
static void req_set_stat(struct rad_req_t *req, struct ppp_t *ppp)
{
struct ifpppstatsreq ifreq;
time_t stop_time;
if (ppp->stop_time)
stop_time = ppp->stop_time;
else
time(&stop_time);
memset(&ifreq, 0, sizeof(ifreq));
ifreq.stats_ptr = (void *)&ifreq.stats;
strcpy(ifreq.ifr__name, ppp->ifname);
if (ioctl(sock_fd, SIOCGPPPSTATS, &ifreq)) {
log_ppp_error("radius: failed to get ppp statistics: %s\n", strerror(errno));
return;
}
if (ifreq.stats.p.ppp_ibytes < req->rpd->acct_input_octets)
req->rpd->acct_input_gigawords++;
req->rpd->acct_input_octets = ifreq.stats.p.ppp_ibytes;
if (ifreq.stats.p.ppp_obytes < req->rpd->acct_output_octets)
req->rpd->acct_output_gigawords++;
req->rpd->acct_output_octets = ifreq.stats.p.ppp_obytes;
rad_packet_change_int(req->pack, NULL, "Acct-Input-Octets", ifreq.stats.p.ppp_ibytes);
rad_packet_change_int(req->pack, NULL, "Acct-Output-Octets", ifreq.stats.p.ppp_obytes);
rad_packet_change_int(req->pack, NULL, "Acct-Input-Packets", ifreq.stats.p.ppp_ipackets);
rad_packet_change_int(req->pack, NULL, "Acct-Output-Packets", ifreq.stats.p.ppp_opackets);
rad_packet_change_int(req->pack, NULL, "Acct-Input-Gigawords", req->rpd->acct_input_gigawords);
rad_packet_change_int(req->pack, NULL, "Acct-Output-Gigawords", req->rpd->acct_output_gigawords);
rad_packet_change_int(req->pack, NULL, "Acct-Session-Time", stop_time - ppp->start_time);
}
static int rad_acct_read(struct triton_md_handler_t *h)
{
struct rad_req_t *req = container_of(h, typeof(*req), hnd);
struct rad_packet_t *pack;
int r;
if (req->reply) {
rad_packet_free(req->reply);
req->reply = NULL;
}
while (1) {
r = rad_packet_recv(h->fd, &pack, NULL);
if (pack) {
if (req->reply)
rad_packet_free(req->reply);
req->reply = pack;
if (conf_interim_verbose) {
log_ppp_info2("recv ");
rad_packet_print(req->reply, log_ppp_info2);
}
}
if (r)
break;
}
if (!req->reply)
return 0;
if (req->reply->code != CODE_ACCOUNTING_RESPONSE || req->reply->id != req->pack->id) {
rad_packet_free(req->reply);
req->reply = NULL;
} else {
if (req->timeout.tpd)
triton_timer_del(&req->timeout);
}
return 0;
}
static void rad_acct_timeout(struct triton_timer_t *t)
{
struct rad_req_t *req = container_of(t, typeof(*req), timeout);
time_t ts, dt;
__sync_add_and_fetch(&stat_interim_lost, 1);
time(&ts);
dt = ts - req->rpd->acct_timestamp;
if (dt > conf_acct_timeout) {
log_ppp_warn("radius:acct: no response, terminating session...\n");
ppp_terminate(req->rpd->ppp, TERM_NAS_ERROR, 0);
return;
}
if (dt > conf_acct_timeout / 2) {
req->timeout.period += 1000;
triton_timer_mod(&req->timeout, 0);
} else if (dt > conf_acct_timeout / 3) {
if (req->timeout.period != conf_timeout * 2000) {
req->timeout.period = conf_timeout * 2000;
triton_timer_mod(&req->timeout, 0);
}
}
req->pack->id++;
rad_packet_change_int(req->pack, NULL, "Acct-Delay-Time", dt);
req_set_RA(req, conf_acct_secret);
rad_req_send(req, conf_interim_verbose);
__sync_add_and_fetch(&stat_interim_sent, 1);
}
static void rad_acct_interim_update(struct triton_timer_t *t)
{
struct radius_pd_t *rpd = container_of(t, typeof(*rpd), acct_interim_timer);
if (rpd->acct_req->timeout.tpd)
return;
if (rpd->session_timeout.expire_tv.tv_sec &&
rpd->session_timeout.expire_tv.tv_sec - (time(NULL) - rpd->ppp->start_time) < INTERIM_SAFE_TIME)
return;
req_set_stat(rpd->acct_req, rpd->ppp);
if (!rpd->acct_interim_interval)
return;
time(&rpd->acct_timestamp);
rpd->acct_req->pack->id++;
rad_packet_change_val(rpd->acct_req->pack, NULL, "Acct-Status-Type", "Interim-Update");
rad_packet_change_int(rpd->acct_req->pack, NULL, "Acct-Delay-Time", 0);
req_set_RA(rpd->acct_req, conf_acct_secret);
rad_req_send(rpd->acct_req, conf_interim_verbose);
__sync_add_and_fetch(&stat_interim_sent, 1);
if (conf_acct_timeout) {
rpd->acct_req->timeout.period = conf_timeout * 1000;
triton_timer_add(rpd->ppp->ctrl->ctx, &rpd->acct_req->timeout, 0);
}
}
int rad_acct_start(struct radius_pd_t *rpd)
{
int i;
time_t ts;
rpd->acct_req = rad_req_alloc(rpd, CODE_ACCOUNTING_REQUEST, rpd->ppp->username);
if (!rpd->acct_req) {
log_emerg("radius: out of memory\n");
return -1;
}
if (rad_req_acct_fill(rpd->acct_req)) {
log_ppp_error("radius:acct: failed to fill accounting attributes\n");
goto out_err;
}
//if (rad_req_add_val(rpd->acct_req, "Acct-Status-Type", "Start", 4))
// goto out_err;
//if (rad_req_add_str(rpd->acct_req, "Acct-Session-Id", rpd->ppp->sessionid, PPP_SESSIONID_LEN, 1))
// goto out_err;
if (rpd->acct_req->reply) {
rad_packet_free(rpd->acct_req->reply);
rpd->acct_req->reply = NULL;
}
time(&rpd->acct_timestamp);
for (i = 0; i < conf_max_try; i++) {
time(&ts);
rad_packet_change_int(rpd->acct_req->pack, NULL, "Acct-Delay-Time", ts - rpd->acct_timestamp);
if (req_set_RA(rpd->acct_req, conf_acct_secret))
goto out_err;
if (rad_req_send(rpd->acct_req, conf_verbose))
goto out_err;
__sync_add_and_fetch(&stat_acct_sent, 1);
rad_req_wait(rpd->acct_req, conf_timeout);
if (!rpd->acct_req->reply) {
rpd->acct_req->pack->id++;
__sync_add_and_fetch(&stat_acct_lost, 1);
continue;
}
if (rpd->acct_req->reply->id != rpd->acct_req->pack->id || rpd->acct_req->reply->code != CODE_ACCOUNTING_RESPONSE) {
rad_packet_free(rpd->acct_req->reply);
rpd->acct_req->reply = NULL;
rpd->acct_req->pack->id++;
__sync_add_and_fetch(&stat_acct_lost, 1);
} else
break;
}
if (!rpd->acct_req->reply) {
log_ppp_warn("radius:acct_start: no response\n");
goto out_err;
}
rpd->acct_req->hnd.read = rad_acct_read;
triton_md_register_handler(rpd->ppp->ctrl->ctx, &rpd->acct_req->hnd);
if (triton_md_enable_handler(&rpd->acct_req->hnd, MD_MODE_READ))
goto out_err;
rpd->acct_req->timeout.expire = rad_acct_timeout;
rpd->acct_req->timeout.period = conf_timeout * 1000;
rpd->acct_interim_timer.expire = rad_acct_interim_update;
rpd->acct_interim_timer.period = rpd->acct_interim_interval ? rpd->acct_interim_interval * 1000 : STAT_UPDATE_INTERVAL;
if (rpd->acct_interim_interval && triton_timer_add(rpd->ppp->ctrl->ctx, &rpd->acct_interim_timer, 0)) {
triton_md_unregister_handler(&rpd->acct_req->hnd);
triton_timer_del(&rpd->acct_req->timeout);
goto out_err;
}
return 0;
out_err:
rad_req_free(rpd->acct_req);
rpd->acct_req = NULL;
return -1;
}
void rad_acct_stop(struct radius_pd_t *rpd)
{
int i;
time_t ts;
if (rpd->acct_interim_timer.tpd)
triton_timer_del(&rpd->acct_interim_timer);
if (rpd->acct_req) {
triton_md_unregister_handler(&rpd->acct_req->hnd);
if (rpd->acct_req->timeout.tpd)
triton_timer_del(&rpd->acct_req->timeout);
switch (rpd->ppp->terminate_cause) {
case TERM_USER_REQUEST:
rad_packet_add_val(rpd->acct_req->pack, NULL, "Acct-Terminate-Cause", "User-Request");
break;
case TERM_SESSION_TIMEOUT:
rad_packet_add_val(rpd->acct_req->pack, NULL, "Acct-Terminate-Cause", "Session-Timeout");
break;
case TERM_ADMIN_RESET:
rad_packet_add_val(rpd->acct_req->pack, NULL, "Acct-Terminate-Cause", "Admin-Reset");
break;
case TERM_USER_ERROR:
case TERM_AUTH_ERROR:
rad_packet_add_val(rpd->acct_req->pack, NULL, "Acct-Terminate-Cause", "User-Error");
break;
case TERM_NAS_ERROR:
rad_packet_add_val(rpd->acct_req->pack, NULL, "Acct-Terminate-Cause", "NAS-Error");
break;
case TERM_NAS_REQUEST:
rad_packet_add_val(rpd->acct_req->pack, NULL, "Acct-Terminate-Cause", "NAS-Request");
break;
case TERM_NAS_REBOOT:
rad_packet_add_val(rpd->acct_req->pack, NULL, "Acct-Terminate-Cause", "NAS-Reboot");
break;
case TERM_LOST_CARRIER:
rad_packet_add_val(rpd->acct_req->pack, NULL, "Acct-Terminate-Cause", "Lost-Carrier");
break;
}
rad_packet_change_val(rpd->acct_req->pack, NULL, "Acct-Status-Type", "Stop");
req_set_stat(rpd->acct_req, rpd->ppp);
req_set_RA(rpd->acct_req, conf_acct_secret);
/// !!! rad_req_add_val(rpd->acct_req, "Acct-Terminate-Cause", "");
if (rpd->acct_req->reply) {
rad_packet_free(rpd->acct_req->reply);
rpd->acct_req->reply = NULL;
}
time(&rpd->acct_timestamp);
for(i = 0; i < conf_max_try; i++) {
time(&ts);
rad_packet_change_int(rpd->acct_req->pack, NULL, "Acct-Delay-Time", ts - rpd->acct_timestamp);
rpd->acct_req->pack->id++;
if (req_set_RA(rpd->acct_req, conf_acct_secret))
break;
if (rad_req_send(rpd->acct_req, conf_verbose))
break;
__sync_add_and_fetch(&stat_acct_sent, 1);
rad_req_wait(rpd->acct_req, conf_timeout);
if (!rpd->acct_req->reply) {
__sync_add_and_fetch(&stat_acct_lost, 1);
continue;
}
if (rpd->acct_req->reply->id != rpd->acct_req->pack->id || rpd->acct_req->reply->code != CODE_ACCOUNTING_RESPONSE) {
rad_packet_free(rpd->acct_req->reply);
rpd->acct_req->reply = NULL;
__sync_add_and_fetch(&stat_acct_lost, 1);
} else
break;
}
if (!rpd->acct_req->reply)
log_ppp_warn("radius:acct_stop: no response\n");
rad_req_free(rpd->acct_req);
rpd->acct_req = NULL;
}
}
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