// L2TPNS Radius Stuff
-// $Id: radius.c,v 1.3 2004/05/24 04:27:11 fred_nerk Exp $
+
+char const *cvs_id_radius = "$Id: radius.c,v 1.9 2004/07/26 00:20:41 fred_nerk Exp $";
#include <time.h>
#include <stdio.h>
extern sessiont *session;
extern tunnelt *tunnel;
extern u32 sessionid;
-extern struct Tstats *_statistics;
extern struct configt *config;
extern int *radfds;
for (i = 0; i < config->num_radfds; i++)
{
int flags;
- if (!radfds[i]) radfds[i] = socket(AF_INET, SOCK_DGRAM, UDP);
+ if (!radfds[i]) radfds[i] = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
flags = fcntl(radfds[i], F_GETFL, 0);
fcntl(radfds[i], F_SETFL, flags | O_NONBLOCK);
}
memset(&radius[r], 0, sizeof(radius[r])); // radius[r].state = RADIUSNULL;
}
-int next_radius_id = 1;
-static u16 new_radius()
+static u16 get_free_radius()
{
- u16 i;
- int loops = 0;
- for (i = next_radius_id; ; i = (i + 1) % MAXRADIUS)
+ int count;
+ static u32 next_radius_id = 0;
+
+ for (count = MAXRADIUS; count > 0 ; --count)
{
- if (radius[i].state == RADIUSNULL)
- {
- next_radius_id = (next_radius_id + 1) % MAXRADIUS;
- return i;
- }
- if (next_radius_id == i)
+ ++next_radius_id; // Find the next ID to check.
+ if (next_radius_id >= MAXRADIUS)
+ next_radius_id = 1;
+
+ if (radius[next_radius_id].state == RADIUSNULL)
{
- if (++loops == 2)
- {
- log(0, 0, 0, 0, "Can't find a free radius session! This is very bad!\n");
- return 0;
- }
+ return next_radius_id;
}
}
+
+ log(0, 0, 0, 0, "Can't find a free radius session! This is very bad!\n");
+ return 0;
}
u16 radiusnew(sessionidt s)
{
- u16 r;
- if (!(r = new_radius()))
+ u16 r = session[s].radius;
+
+ /* re-use */
+ if (r)
+ {
+ log(3, 0, s, session[s].tunnel, "Re-used radius %d\n", r);
+ return r;
+ }
+
+ if (!(r = get_free_radius()))
{
log(1, 0, s, session[s].tunnel, "No free RADIUS sessions\n");
STAT(radius_overflow);
return 0;
};
+
memset(&radius[r], 0, sizeof(radius[r]));
session[s].radius = r;
radius[r].session = s;
radius[r].state = RADIUSWAIT;
+ radius[r].retry = TIME + 1200; // Wait at least 120 seconds to re-claim this.
+
+ log(3,0,s, session[s].tunnel, "Allocated radius %d\n", r);
return r;
}
int pl;
u8 *p;
sessionidt s;
-#ifdef STAT_CALLS
- STAT(call_radiussend);
-#endif
+
+ CSTAT(call_radiussend);
+
s = radius[r].session;
if (!config->numradiusservers)
{
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
*(u32 *) & addr.sin_addr = config->radiusserver[(radius[r].try - 1) % config->numradiusservers];
- addr.sin_port = htons((state == RADIUSAUTH) ? RADPORT : RADAPORT);
+ {
+ // get radius port
+ u16 port = config->radiusport[(radius[r].try - 1) % config->numradiusservers];
+ // no need to define the accounting port for itself:
+ // the accounting port is as far as I know always one more
+ // than the auth port JK 20040713
+ addr.sin_port = htons((state == RADIUSAUTH) ? port : port+1);
+ }
log_hex(5, "RADIUS Send", b, (p - b));
sendto(radfds[r & RADIUS_MASK], b, p - b, 0, (void *) &addr, sizeof(addr));
hasht hash;
u8 routes = 0;
-#ifdef STAT_CALLS
- STAT(call_processrad);
-#endif
+ int r_code, r_id ; // Radius code.
+
+ r_code = buf[0]; // First byte in radius packet.
+ r_id = buf[1]; // radius reply indentifier.
+
+
+ CSTAT(call_processrad);
+
log_hex(5, "RADIUS Response", buf, len);
if (len < 20 || len < ntohs(*(u16 *) (buf + 2)))
{
return ;
}
len = ntohs(*(u16 *) (buf + 2));
- r = socket_index | (buf[1] << RADIUS_SHIFT);
+ r = socket_index | (r_id << RADIUS_SHIFT);
s = radius[r].session;
- log(3, 0, s, session[s].tunnel, "Received %s, radius %d response for session %u\n",
- radius_states[radius[r].state], r, s);
+ log(3, 0, s, session[s].tunnel, "Received %s, radius %d response for session %u (code %d, id %d)\n",
+ radius_states[radius[r].state], r, s, r_code, r_id);
if (!s && radius[r].state != RADIUSSTOP)
{
log(1, 0, s, session[s].tunnel, " Unexpected RADIUS response\n");
do {
if (memcmp(hash, buf + 4, 16))
{
- log(0, 0, s, session[s].tunnel, " Incorrect auth on RADIUS response\n");
- radius[r].state = RADIUSWAIT;
- break;
+ log(0, 0, s, session[s].tunnel, " Incorrect auth on RADIUS response!! (wrong secret in radius config?)\n");
+ return; // Do nothing. On timeout, it will try the next radius server.
}
if ((radius[r].state == RADIUSAUTH && *buf != 2 && *buf != 3) ||
((radius[r].state == RADIUSSTART || radius[r].state == RADIUSSTOP) && *buf != 5))
{
log(1, 0, s, session[s].tunnel, " Unexpected RADIUS response %d\n", *buf);
- radius[r].state = RADIUSWAIT;
- break;
+ return; // We got something we didn't expect. Let the timeouts take
+ // care off finishing the radius session if that's really correct.
}
if (radius[r].state == RADIUSAUTH)
{
if (radius[r].chap)
{
// CHAP
- u8 *p = makeppp(b, 0, 0, t, s, PPPCHAP);
-
+ u8 *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPCHAP);
+ if (!p) {
+ return; // Abort!
+ }
{
struct param_post_auth packet = { &tunnel[t], &session[s], session[s].user, (*buf == 2), PPPCHAP };
run_plugins(PLUGIN_POST_AUTH, &packet);
else
{
// PAP
- u8 *p = makeppp(b, 0, 0, t, s, PPPPAP);
+ u8 *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPPAP);
+ if (!p)
+ return; // Abort!
{
struct param_post_auth packet = { &tunnel[t], &session[s], session[s].user, (*buf == 2), PPPPAP };
// Statically assigned address
log(3, 0, s, session[s].tunnel, " Radius reply contains IP address %s\n", inet_toa(*(u32 *) (p + 2)));
session[s].ip = ntohl(*(u32 *) (p + 2));
+ session[s].ip_pool_index = -1;
}
else if (*p == 135)
{
// DNS address
- log(3, 0, s, session[s].tunnel, " Radius reply contains primary DNS address %s\n", inet_toa(ntohl(*(u32 *) (p + 2))));
+ log(3, 0, s, session[s].tunnel, " Radius reply contains primary DNS address %s\n", inet_toa(*(u32 *) (p + 2)));
session[s].dns1 = ntohl(*(u32 *) (p + 2));
}
else if (*p == 136)
{
// DNS address
- log(3, 0, s, session[s].tunnel, " Radius reply contains secondary DNS address %s\n", inet_toa(ntohl(*(u32 *) (p + 2))));
+ log(3, 0, s, session[s].tunnel, " Radius reply contains secondary DNS address %s\n", inet_toa(*(u32 *) (p + 2)));
session[s].dns2 = ntohl(*(u32 *) (p + 2));
}
else if (*p == 22)
{
log(1, 0, s, session[s].tunnel, " Too many routes\n");
}
- else
+ else if (ip)
{
char *ips, *masks;
- ips = strdup(inet_toa(ip));
- masks = strdup(inet_toa(mask));
+ ips = strdup(inet_toa(htonl(ip)));
+ masks = strdup(inet_toa(htonl(mask)));
log(3, 0, s, session[s].tunnel, " Radius reply contains route for %s/%s\n", ips, masks);
free(ips);
free(masks);
else if (*buf == 3)
{
log(2, 0, s, session[s].tunnel, " Authentication denied for %s\n", session[s].user);
+//FIXME: We should tear down the session here!
break;
}
- // Check for Assign-IP-Address
- if (!session[s].ip || session[s].ip == 0xFFFFFFFE)
- {
- assign_ip_address(s);
- if (session[s].ip)
- log(3, 0, s, t, " No IP allocated by radius. Assigned %s from pool\n",
- inet_toa(htonl(session[s].ip)));
- else
- log(0, 0, s, t, " No IP allocated by radius. The IP address pool is FULL!\n");
- }
if (!session[s].dns1 && config->default_dns1)
{
session[s].dns1 = htonl(config->default_dns1);
log(3, 0, s, t, " Sending dns2 = %s\n", inet_toa(config->default_dns2));
}
- if (session[s].ip)
- {
- // Valid Session, set it up
- session[s].sid = 0;
- sessionsetup(t, s, routes);
- }
- else
- {
- log(0, 0, s, t, " End of processrad(), but no valid session exists.\n");
- sessionkill(s, "Can't create valid session");
- }
+ // Valid Session, set it up
+ session[s].sid = 0;
+ sessionsetup(t, s);
}
else
{
- log(3, 0, s, t, " RADIUS response in state %s\n", radius_states[radius[r].state]);
+ // An ack for a stop or start record.
+ log(3, 0, s, t, " RADIUS accounting ack recv in state %s\n", radius_states[radius[r].state]);
+ break;
}
} while (0);
{
sessionidt s = radius[r].session;
tunnelidt t = 0;
-#ifdef STAT_CALLS
- STAT(call_radiusretry);
-#endif
+
+ CSTAT(call_radiusretry);
+
if (s)
t = session[s].tunnel;
radius[r].retry = backoff(radius[r].try + 1);
|| !session[radius[i].session].opened
|| session[radius[i].session].die
|| session[radius[i].session].tunnel == 0)
- radiusclear(i, 0);
+ radiusclear(i, radius[i].session);
}
}
projects / l2tpns.git / blobdiff