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#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include "log.h"
#include "ppp.h"
#include "pwdb.h"
#include "ipdb.h"
#include "radius.h"
#define CHAP_MD5 5
#define MSCHAP_V1 0x80
#define MSCHAP_V2 0x81
int conf_max_try = 3;
int conf_timeout = 3;
char *conf_nas_identifier = "accel-pptpd";
char *conf_nas_ip_address;
char *conf_gw_ip_address;
int conf_verbose = 0;
char *conf_auth_server;
int conf_auth_server_port = 1812;
char *conf_auth_server_secret;
char *conf_acct_server;
int conf_acct_server_port = 1813;
char *conf_acct_server_secret;
static struct ppp_notified_t notified;
void rad_proc_attrs(struct rad_req_t *req)
{
struct rad_req_attr_t *attr;
list_for_each_entry(attr, &req->reply->attrs, entry) {
if (!strcmp(attr->attr->name, "Framed-IP-Address"))
req->rpd->ipaddr = attr->val.ipaddr;
else if (!strcmp(attr->attr->name, "Acct-Interim-Interval"))
req->rpd->acct_interim_interval = attr->val.integer;
}
}
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 radius_pd_t *rpd = find_pd(ppp);
va_copy(args, _args);
switch(type) {
case PPP_PAP:
r = rad_auth_pap(rpd, username, args);
break;
case PPP_CHAP:
chap_type = va_arg(args, int);
switch(chap_type) {
case CHAP_MD5:
r = rad_auth_chap_md5(rpd, username, args);
break;
case MSCHAP_V1:
r = rad_auth_mschap_v1(rpd, username, args);
break;
case MSCHAP_V2:
r = rad_auth_mschap_v2(rpd, username, args);
break;
}
break;
}
va_end(args);
return r;
}
static int get_ip(struct ppp_t *ppp, in_addr_t *addr, in_addr_t *peer_addr)
{
struct radius_pd_t *rpd = find_pd(ppp);
if (rpd->ipaddr) {
if (!conf_gw_ip_address) {
log_warn("radius: gw-ip-address not specified, cann't assign IP address...\n");
return -1;
}
*peer_addr = rpd->ipaddr;
*addr = inet_addr(conf_gw_ip_address);
return 0;
}
return -1;
}
static void ppp_starting(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_started(struct ppp_notified_t *n, struct ppp_t *ppp)
{
struct radius_pd_t *rpd = find_pd(ppp);
if (rad_acct_start(rpd))
ppp_terminate(rpd->ppp, 0);
}
static void ppp_finishing(struct ppp_notified_t *n, struct ppp_t *ppp)
{
struct radius_pd_t *rpd = find_pd(ppp);
rad_acct_stop(rpd);
}
static void ppp_finished(struct ppp_notified_t *n, struct ppp_t *ppp)
{
struct radius_pd_t *rpd = find_pd(ppp);
list_del(&rpd->pd.entry);
free(rpd);
}
struct radius_pd_t *find_pd(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);
return rpd;
}
}
log_error("radius:BUG: rpd not found\n");
abort();
}
static struct ipdb_t ipdb = {
.get = get_ip,
};
static struct pwdb_t pwdb = {
.check = check,
};
static struct ppp_notified_t notified = {
.starting = ppp_starting,
.started = ppp_started,
.finishing = ppp_finishing,
.finished = ppp_finished,
};
static int parse_server(const char *opt, char **name, int *port, char **secret)
{
char *str = strdup(opt);
char *p1, *p2;
p1 = strstr(str, ":");
p2 = strstr(str, ",");
if (p1)
*p1 = 0;
if (p2)
*p2 = 0;
else
return -1;
*name = str;
if (p1) {
*port = atoi(p1 + 1);
if (*port <=0 )
return -1;
}
*secret = p2 + 1;
return 0;
}
static void __init radius_init(void)
{
char *opt;
opt = conf_get_opt("radius", "max-try");
if (opt && atoi(opt) > 0)
conf_max_try = atoi(opt);
opt = conf_get_opt("radius", "timeout");
if (opt && atoi(opt) > 0)
conf_timeout = atoi(opt);
opt = conf_get_opt("radius", "verbose");
if (opt && atoi(opt) > 0)
conf_verbose = 1;
opt = conf_get_opt("radius", "nas-ip-address");
if (opt)
conf_nas_ip_address = opt;
opt = conf_get_opt("radius", "gw-ip-address");
if (opt)
conf_gw_ip_address = opt;
opt = conf_get_opt("radius", "auth_server");
if (!opt) {
log_error("radius: auth_server not specified\n");
_exit(EXIT_FAILURE);
} else if (parse_server(opt, &conf_auth_server, &conf_auth_server_port, &conf_auth_server_secret)) {
log_error("radius: failed to parse auth_server\n");
_exit(EXIT_FAILURE);
}
opt = conf_get_opt("radius", "acct_server");
if (opt && parse_server(opt, &conf_acct_server, &conf_acct_server_port, &conf_acct_server_secret)) {
log_error("radius: failed to parse acct_server\n");
_exit(EXIT_FAILURE);
}
opt = conf_get_opt("radius", "dictionary");
if (!opt) {
fprintf(stderr, "radius: dictionary not specified\n");
_exit(EXIT_FAILURE);
}
if (rad_dict_load(opt))
_exit(EXIT_FAILURE);
pwdb_register(&pwdb);
ipdb_register(&ipdb);
ppp_register_notified(¬ified);
}
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