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#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "ppp.h"
#include "pwdb.h"
#include "radius.h"
int conf_max_try = 3;
int conf_timeout = 3;
char *conf_nas_identifier = "accel-pptpd";
char *conf_nas_ip_address;
static struct ppp_notified_t notified;
static int check_pap(struct radius_pd_t *rpd, const char *username, va_list args)
{
struct rad_req_t *req;
int i, r = PWDB_DENIED;
//int id = va_arg(args, int);
const char *passwd = va_arg(args, const char *);
req = rad_req_alloc(rpd, CODE_ACCESS_REQUEST, username);
if (!req)
return PWDB_DENIED;
if (rad_req_add_str(req, "User-Password", passwd, strlen(passwd)))
goto out;
for(i = 0; i < conf_max_try; i++) {
if (rad_req_send(req))
goto out;
if (rad_req_wait(req, conf_timeout))
goto out;
if (req->reply)
break;
}
out:
rad_req_free(req);
return r;
}
static int check_chap_md5(struct radius_pd_t *rpd, const char *username, va_list args)
{
/*int id = va_arg(args, int);
const uint8_t *challenge = va_arg(args, const uint8_t *);*/
return PWDB_DENIED;
}
static int check_mschap_v1(struct radius_pd_t *rpd, const char *username, va_list args)
{
/*int id = va_arg(args, int);
const uint8_t *challenge = va_arg(args, const uint8_t *);
const uint8_t *lm_response = va_arg(args, const uint8_t *);
const uint8_t *nt_response = va_arg(args, const uint8_t *);
int flags = va_arg(args, int);*/
return PWDB_DENIED;
}
static int check_mschap_v2(struct radius_pd_t *rpd, const char *username, va_list args)
{
/*int id = va_arg(args, int);
const uint8_t *challenge = va_arg(args, const uint8_t *);
const uint8_t *peer_challenge = va_arg(args, const uint8_t *);
const uint8_t *response = va_arg(args, const uint8_t *);
int flags = va_arg(args, int);
uint8_t *authenticator = va_arg(args, uint8_t *);*/
return PWDB_DENIED;
}
static int check(struct pwdb_t *pwdb, struct ppp_t *ppp, const char *username, int type, va_list _args)
{
int r = PWDB_NO_IMPL;
va_list args;
int chap_type;
struct ppp_pd_t *pd;
struct radius_pd_t *rpd = NULL;
list_for_each_entry(pd, &ppp->pd_list, entry) {
if (pd->key == ¬ified) {
rpd = container_of(pd, typeof(*rpd), pd);
break;
}
}
va_copy(args, _args);
switch(type) {
case PPP_PAP:
r = check_pap(rpd, username, args);
break;
case PPP_CHAP:
chap_type = va_arg(args, int);
switch(chap_type) {
case 0x05:
r = check_chap_md5(rpd, username, args);
break;
case 0x80:
r = check_mschap_v1(rpd, username, args);
break;
case 0x81:
r = check_mschap_v2(rpd, username, args);
break;
}
break;
}
va_end(args);
return r;
}
static void ppp_started(struct ppp_notified_t *n, struct ppp_t *ppp)
{
struct radius_pd_t *pd = malloc(sizeof(*pd));
memset(pd, 0, sizeof(*pd));
pd->pd.key = n;
pd->ppp = ppp;
list_add_tail(&pd->pd.entry, &ppp->pd_list);
}
static void ppp_finished(struct ppp_notified_t *n, struct ppp_t *ppp)
{
struct ppp_pd_t *pd;
struct radius_pd_t *rpd;
list_for_each_entry(pd, &ppp->pd_list, entry) {
if (pd->key == ¬ified) {
rpd = container_of(pd, typeof(*rpd), pd);
list_del(&pd->entry);
free(rpd);
return;
}
}
}
static struct pwdb_t pwdb = {
.check = check,
};
static struct ppp_notified_t notified = {
.started = ppp_started,
.finished = ppp_finished,
};
static void __init radius_init(void)
{
char *dict = conf_get_opt("radius", "dictionary");
if (!dict) {
fprintf(stderr, "radius: dictionary not specified\n");
_exit(EXIT_FAILURE);
}
if (!rad_dict_load(dict))
_exit(EXIT_FAILURE);
pwdb_register(&pwdb);
ppp_register_notified(¬ified);
}
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