// L2TPNS Radius Stuff
-char const *cvs_id_radius = "$Id: radius.c,v 1.18 2004-11-29 02:17:18 bodea Exp $";
+char const *cvs_id_radius = "$Id: radius.c,v 1.33 2005-06-04 15:42:36 bodea Exp $";
#include <time.h>
#include <stdio.h>
extern radiust *radius;
extern sessiont *session;
extern tunnelt *tunnel;
-extern u32 sessionid;
extern configt *config;
extern int *radfds;
extern ip_filtert *ip_filters;
-static const char *radius_state(int state)
-{
- static char *tmp = NULL;
- int i;
- for (i = 0; radius_states[i]; i++)
- if (i == state) return radius_states[i];
-
- if (tmp == NULL) tmp = (char *)calloc(64, 1);
- sprintf(tmp, "%d", state);
- return tmp;
-}
-
// Set up socket for radius requests
void initrad(void)
{
int i;
- LOG(3, 0, 0, "Creating %d sockets for RADIUS queries\n", config->num_radfds);
- radfds = calloc(sizeof(int), config->num_radfds);
- for (i = 0; i < config->num_radfds; i++)
+ LOG(3, 0, 0, "Creating %d sockets for RADIUS queries\n", RADIUS_FDS);
+ radfds = calloc(sizeof(int), RADIUS_FDS);
+ for (i = 0; i < RADIUS_FDS; i++)
{
int flags;
radfds[i] = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
}
}
-void radiusclear(u16 r, sessionidt s)
+void radiusclear(uint16_t r, sessionidt s)
{
- if (s) session[s].radius = 0;
+ if (s) sess_local[s].radius = 0;
memset(&radius[r], 0, sizeof(radius[r])); // radius[r].state = RADIUSNULL;
}
-
-static u16 get_free_radius()
+static uint16_t get_free_radius()
{
int count;
- static u32 next_radius_id = 0;
+ static uint32_t next_radius_id = 0;
for (count = MAXRADIUS; count > 0 ; --count)
{
return 0;
}
-u16 radiusnew(sessionidt s)
+uint16_t radiusnew(sessionidt s)
{
- u16 r = session[s].radius;
+ uint16_t r = sess_local[s].radius;
/* re-use */
if (r)
};
memset(&radius[r], 0, sizeof(radius[r]));
- session[s].radius = r;
+ sess_local[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.
+ random_data(radius[r].auth, sizeof(radius[r].auth));
+
LOG(3, s, session[s].tunnel, "Allocated radius %d\n", r);
return r;
}
// Send a RADIUS request
-void radiussend(u16 r, u8 state)
+void radiussend(uint16_t r, uint8_t state)
{
struct sockaddr_in addr;
- u8 b[4096]; // RADIUS packet
+ uint8_t b[4096]; // RADIUS packet
char pass[129];
int pl;
- u8 *p;
+ uint8_t *p;
sessionidt s;
- CSTAT(call_radiussend);
+ CSTAT(radiussend);
s = radius[r].session;
if (!config->numradiusservers)
if (radius[r].state != state)
radius[r].try = 0;
+
radius[r].state = state;
- radius[r].retry = backoff(radius[r].try++);
+ radius[r].retry = backoff(radius[r].try++) + 20; // 3s, 4s, 6s, 10s...
LOG(4, s, session[s].tunnel, "Send RADIUS id %d sock %d state %s try %d\n",
r >> RADIUS_SHIFT, r & RADIUS_MASK,
radius_state(radius[r].state), radius[r].try);
if (s)
{
if (state == RADIUSAUTH)
- sessionshutdown(s, "RADIUS timeout");
+ sessionshutdown(s, "RADIUS timeout.", 3, 0);
else
{
LOG(1, s, session[s].tunnel, "RADIUS timeout, but in state %s so don't timeout session\n",
- radius_states[state]);
+ radius_state(state));
radiusclear(r, s);
}
STAT(radius_timeout);
radius[r].state = RADIUSWAIT;
radius[r].retry = 100;
}
- return ;
+ return;
}
// contruct RADIUS access request
switch (state)
{
case RADIUSAUTH:
- b[0] = 1; // access request
+ b[0] = AccessRequest; // access request
break;
case RADIUSSTART:
case RADIUSSTOP:
- b[0] = 4; // accounting request
+ case RADIUSINTERIM:
+ b[0] = AccountingRequest; // accounting request
break;
default:
LOG(0, 0, 0, "Unknown radius state %d\n", state);
p += p[1];
}
}
- else if (state == RADIUSSTART || state == RADIUSSTOP)
- { // accounting
- *p = 40; // accounting type
+ else if (state == RADIUSSTART || state == RADIUSSTOP || state == RADIUSINTERIM)
+ { // accounting
+ *p = 40; // accounting type
p[1] = 6;
- *(u32 *) (p + 2) = htonl((state == RADIUSSTART) ? 1 : 2);
+ *(uint32_t *) (p + 2) = htonl(state - RADIUSSTART + 1); // start=1, stop=2, interim=3
p += p[1];
if (s)
{
- *p = 44; // session ID
+ *p = 44; // session ID
p[1] = 18;
- sprintf(p + 2, "%08X%08X", session[s].id, session[s].opened);
+ sprintf(p + 2, "%08X%08X", session[s].unique_id, session[s].opened);
p += p[1];
- if (state == RADIUSSTOP)
- { // stop
- *p = 42; // input octets
+ if (state == RADIUSSTART)
+ { // start
+ *p = 41; // delay
p[1] = 6;
- *(u32 *) (p + 2) = htonl(session[s].cin);
+ *(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened);
p += p[1];
- *p = 43; // output octets
+ sess_local[s].last_interim = time_now; // Setup "first" Interim
+ }
+ else
+ { // stop, interim
+ *p = 42; // input octets
p[1] = 6;
- *(u32 *) (p + 2) = htonl(session[s].cout);
+ *(uint32_t *) (p + 2) = htonl(session[s].cin);
p += p[1];
- *p = 46; // session time
+
+ *p = 43; // output octets
p[1] = 6;
- *(u32 *) (p + 2) = htonl(time(NULL) - session[s].opened);
+ *(uint32_t *) (p + 2) = htonl(session[s].cout);
p += p[1];
- *p = 47; // input packets
+ if (state == RADIUSSTOP)
+ {
+ *p = 46; // session time
+ p[1] = 6;
+ *(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened);
+ p += p[1];
+ }
+
+ *p = 47; // input packets
p[1] = 6;
- *(u32 *) (p + 2) = htonl(session[s].pin);
+ *(uint32_t *) (p + 2) = htonl(session[s].pin);
p += p[1];
- *p = 48; // output spackets
+
+ *p = 48; // output packets
p[1] = 6;
- *(u32 *) (p + 2) = htonl(session[s].pout);
+ *(uint32_t *) (p + 2) = htonl(session[s].pout);
p += p[1];
- }
- else
- { // start
- *p = 41; // delay
+
+ *p = 52; // input gigawords
+ p[1] = 6;
+ *(uint32_t *) (p + 2) = htonl(session[s].cin_wrap);
+ p += p[1];
+
+ *p = 53; // output gigawords
p[1] = 6;
- *(u32 *) (p + 2) = htonl(time(NULL) - session[s].opened);
+ *(uint32_t *) (p + 2) = htonl(session[s].cout_wrap);
+ p += p[1];
+ }
+
+ if (session[s].snoop_ip && session[s].snoop_port)
+ {
+ *p = 26; // vendor-specific
+ *(uint32_t *) (p + 2) = htonl(9); // Cisco
+ p[6] = 1; // Cisco-Avpair
+ p[7] = 2 + sprintf(p + 8, "intercept=%s:%d",
+ fmtaddr(session[s].snoop_ip, 0), session[s].snoop_port);
+
+ p[1] = p[7] + 6;
p += p[1];
}
}
{
*p = 5; // NAS-Port
p[1] = 6;
- *(u32 *) (p + 2) = htonl(s);
+ *(uint32_t *) (p + 2) = htonl(s);
p += p[1];
}
if (s && session[s].ip)
{
*p = 8; // Framed-IP-Address
p[1] = 6;
- *(u32 *) (p + 2) = htonl(session[s].ip);
+ *(uint32_t *) (p + 2) = htonl(session[s].ip);
p += p[1];
}
if (*session[s].called)
// NAS-IP-Address
*p = 4;
p[1] = 6;
- *(u32 *)(p + 2) = config->bind_address;
+ *(uint32_t *)(p + 2) = config->bind_address;
p += p[1];
// All AVpairs added
- *(u16 *) (b + 2) = htons(p - b);
+ *(uint16_t *) (b + 2) = htons(p - b);
if (state != RADIUSAUTH)
{
// Build auth for accounting packet
}
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
- *(u32 *) & addr.sin_addr = config->radiusserver[(radius[r].try - 1) % config->numradiusservers];
+ *(uint32_t *) & addr.sin_addr = config->radiusserver[(radius[r].try - 1) % config->numradiusservers];
{
- // 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);
+ // get radius port
+ uint16_t port = config->radiusport[(radius[r].try - 1) % config->numradiusservers];
+ // assume RADIUS accounting port is the authentication port +1
+ addr.sin_port = htons((state == RADIUSAUTH) ? port : port+1);
}
LOG_HEX(5, "RADIUS Send", b, (p - b));
}
// process RADIUS response
-void processrad(u8 *buf, int len, char socket_index)
+void processrad(uint8_t *buf, int len, char socket_index)
{
- u8 b[MAXCONTROL];
+ uint8_t b[MAXCONTROL];
MD5_CTX ctx;
- u16 r;
+ uint16_t r;
sessionidt s;
tunnelidt t = 0;
hasht hash;
- u8 routes = 0;
-
- int r_code, r_id ; // Radius code.
-
- r_code = buf[0]; // First byte in radius packet.
- r_id = buf[1]; // radius reply indentifier.
-
+ uint8_t routes = 0;
+ int r_code;
+ int r_id;
- CSTAT(call_processrad);
+ CSTAT(processrad);
LOG_HEX(5, "RADIUS Response", buf, len);
- if (len < 20 || len < ntohs(*(u16 *) (buf + 2)))
+ if (len < 20 || len < ntohs(*(uint16_t *) (buf + 2)))
{
LOG(1, 0, 0, "Duff RADIUS response length %d\n", len);
return ;
}
- len = ntohs(*(u16 *) (buf + 2));
+
+ r_code = buf[0]; // response type
+ r_id = buf[1]; // radius reply indentifier.
+
+ len = ntohs(*(uint16_t *) (buf + 2));
r = socket_index | (r_id << RADIUS_SHIFT);
s = radius[r].session;
- LOG(3, 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);
+ LOG(3, s, session[s].tunnel, "Received %s, radius %d response for session %u (%s, id %d)\n",
+ radius_state(radius[r].state), r, s, radius_code(r_code), r_id);
+
if (!s && radius[r].state != RADIUSSTOP)
{
LOG(1, s, session[s].tunnel, " Unexpected RADIUS response\n");
return;
}
- if (radius[r].state != RADIUSAUTH && radius[r].state != RADIUSSTART && radius[r].state != RADIUSSTOP)
+ if (radius[r].state != RADIUSAUTH && radius[r].state != RADIUSSTART
+ && radius[r].state != RADIUSSTOP && radius[r].state != RADIUSINTERIM)
{
LOG(1, s, session[s].tunnel, " Unexpected RADIUS response\n");
return;
LOG(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))
+
+ if ((radius[r].state == RADIUSAUTH && r_code != AccessAccept && r_code != AccessReject) ||
+ ((radius[r].state == RADIUSSTART || radius[r].state == RADIUSSTOP || radius[r].state == RADIUSINTERIM) && r_code != AccountingResponse))
{
- LOG(1, s, session[s].tunnel, " Unexpected RADIUS response %d\n", *buf);
+ LOG(1, s, session[s].tunnel, " Unexpected RADIUS response %s\n", radius_code(r_code));
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)
{
- LOG(4, s, session[s].tunnel, " Original response is \"%s\"\n", (*buf == 2) ? "accept" : "reject");
+ // run post-auth plugin
+ struct param_post_auth packet = {
+ &tunnel[t],
+ &session[s],
+ session[s].user,
+ (r_code == AccessAccept),
+ radius[r].chap ? PPPCHAP : PPPPAP
+ };
+
+ run_plugins(PLUGIN_POST_AUTH, &packet);
+ r_code = packet.auth_allowed ? AccessAccept : AccessReject;
+
// process auth response
if (radius[r].chap)
{
// CHAP
- u8 *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPCHAP);
+ uint8_t *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);
- *buf = packet.auth_allowed ? 2 : 3;
- }
-
- LOG(3, s, session[s].tunnel, " CHAP User %s authentication %s.\n", session[s].user,
- (*buf == 2) ? "allowed" : "denied");
- *p = (*buf == 2) ? 3 : 4; // ack/nak
+ *p = (r_code == AccessAccept) ? 3 : 4; // ack/nak
p[1] = radius[r].id;
- *(u16 *) (p + 2) = ntohs(4); // no message
+ *(uint16_t *) (p + 2) = ntohs(4); // no message
tunnelsend(b, (p - b) + 4, t); // send it
+
+ LOG(3, s, session[s].tunnel, " CHAP User %s authentication %s.\n", session[s].user,
+ (r_code == AccessAccept) ? "allowed" : "denied");
}
else
{
// PAP
- u8 *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPPAP);
+ uint8_t *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 };
- run_plugins(PLUGIN_POST_AUTH, &packet);
- *buf = packet.auth_allowed ? 2 : 3;
- }
-
- LOG(3, s, session[s].tunnel, " PAP User %s authentication %s.\n", session[s].user,
- (*buf == 2) ? "allowed" : "denied");
// ack/nak
- *p = *buf;
+ *p = r_code;
p[1] = radius[r].id;
- *(u16 *) (p + 2) = ntohs(5);
+ *(uint16_t *) (p + 2) = ntohs(5);
p[4] = 0; // no message
tunnelsend(b, (p - b) + 5, t); // send it
+
+ LOG(3, s, session[s].tunnel, " PAP User %s authentication %s.\n", session[s].user,
+ (r_code == AccessAccept) ? "allowed" : "denied");
}
- if (*buf == 2)
+ if (r_code == AccessAccept)
{
// Login successful
// Extract IP, routes, etc
- u8 *p = buf + 20;
- u8 *e = buf + len;
- for (p = buf + 20; p < e && p[1]; p += p[1])
+ uint8_t *p = buf + 20;
+ uint8_t *e = buf + len;
+ for (; p + 2 <= e && p[1] && p + p[1] <= e; p += p[1])
{
if (*p == 8)
{
// Framed-IP-Address
- session[s].ip = ntohl(*(u32 *) (p + 2));
+ if (p[1] < 6) continue;
+ session[s].ip = ntohl(*(uint32_t *) (p + 2));
session[s].ip_pool_index = -1;
LOG(3, s, session[s].tunnel, " Radius reply contains IP address %s\n",
fmtaddr(htonl(session[s].ip), 0));
+
+ if (session[s].ip == 0xFFFFFFFE)
+ session[s].ip = 0; // assign from pool
}
else if (*p == 135)
{
// DNS address
- session[s].dns1 = ntohl(*(u32 *) (p + 2));
+ if (p[1] < 6) continue;
+ session[s].dns1 = ntohl(*(uint32_t *) (p + 2));
LOG(3, s, session[s].tunnel, " Radius reply contains primary DNS address %s\n",
fmtaddr(htonl(session[s].dns1), 0));
}
else if (*p == 136)
{
// DNS address
- session[s].dns2 = ntohl(*(u32 *) (p + 2));
+ if (p[1] < 6) continue;
+ session[s].dns2 = ntohl(*(uint32_t *) (p + 2));
LOG(3, s, session[s].tunnel, " Radius reply contains secondary DNS address %s\n",
fmtaddr(htonl(session[s].dns2), 0));
}
else if (*p == 22)
{
// Framed-Route
- ipt ip = 0, mask = 0;
- u8 u = 0;
- u8 bits = 0;
- u8 *n = p + 2;
- u8 *e = p + p[1];
+ in_addr_t ip = 0, mask = 0;
+ uint8_t u = 0;
+ uint8_t bits = 0;
+ uint8_t *n = p + 2;
+ uint8_t *e = p + p[1];
while (n < e && (isdigit(*n) || *n == '.'))
{
if (*n == '.')
char *filter = p + 2;
int l = p[1] - 2;
char *suffix;
- u8 *f = 0;
+ uint8_t *f = 0;
int i;
LOG(3, s, session[s].tunnel, " Radius reply contains Filter-Id \"%.*s\"\n", l, filter);
LOG(3, s, session[s].tunnel, " Unknown filter\n");
}
- else if (*p == 26)
+ else if (*p == 26 && p[1] >= 7)
{
// Vendor-Specific Attribute
int vendor = ntohl(*(int *)(p + 2));
char attrib = *(p + 6);
- char attrib_length = *(p + 7) - 2;
+ int attrib_length = *(p + 7) - 2;
+ char *avpair, *value, *key, *newp;
+
LOG(3, s, session[s].tunnel, " Radius reply contains Vendor-Specific. Vendor=%d Attrib=%d Length=%d\n", vendor, attrib, attrib_length);
- if (attrib_length == 0) continue;
- if (attrib != 1)
+ if (vendor != 9 || attrib != 1)
+ {
LOG(3, s, session[s].tunnel, " Unknown vendor-specific\n");
- else
+ continue;
+ }
+
+ if (attrib_length < 0) continue;
+
+ avpair = key = calloc(attrib_length + 1, 1);
+ memcpy(avpair, p + 8, attrib_length);
+ LOG(3, s, session[s].tunnel, " Cisco-Avpair value: %s\n", avpair);
+ do {
+ value = strchr(key, '=');
+ if (!value) break;
+ *value++ = 0;
+
+ // Trim quotes off reply string
+ if (*value == '\'' || *value == '\"')
+ {
+ char *x;
+ value++;
+ x = value + strlen(value) - 1;
+ if (*x == '\'' || *x == '\"')
+ *x = 0;
+ }
+
+ // Run hooks
+ newp = strchr(value, ',');
+ if (newp) *newp++ = 0;
+ {
+ struct param_radius_response p = { &tunnel[session[s].tunnel], &session[s], key, value };
+ run_plugins(PLUGIN_RADIUS_RESPONSE, &p);
+ }
+ key = newp;
+ } while (newp);
+ free(avpair);
+ }
+ else if (*p == 99)
+ {
+ // Framed-IPv6-Route
+ struct in6_addr r6;
+ int prefixlen;
+ uint8_t *n = p + 2;
+ uint8_t *e = p + p[1];
+ uint8_t *m = strchr(n, '/');
+
+ *m++ = 0;
+ inet_pton(AF_INET6, n, &r6);
+
+ prefixlen = 0;
+ while (m < e && isdigit(*m)) {
+ prefixlen = prefixlen * 10 + *m++ - '0';
+ }
+
+ if (prefixlen)
{
- char *avpair, *value, *key, *newp;
- avpair = key = calloc(attrib_length + 1, 1);
- memcpy(avpair, p + 8, attrib_length);
- LOG(3, s, session[s].tunnel, " Cisco-Avpair value: %s\n", avpair);
- do {
- value = strchr(key, '=');
- if (!value) break;
- *value++ = 0;
-
- // Trim quotes off reply string
- if (*value == '\'' || *value == '\"')
- {
- char *x;
- value++;
- x = value + strlen(value) - 1;
- if (*x == '\'' || *x == '\"')
- *x = 0;
- }
-
- // Run hooks
- newp = strchr(value, ',');
- if (newp) *newp++ = 0;
- {
- struct param_radius_response p = { &tunnel[session[s].tunnel], &session[s], key, value };
- run_plugins(PLUGIN_RADIUS_RESPONSE, &p);
- }
- key = newp;
- } while (newp);
- free(avpair);
+ LOG(3, s, session[s].tunnel,
+ " Radius reply contains route for %s/%d\n",
+ n, prefixlen);
+ session[s].ipv6route = r6;
+ session[s].ipv6prefixlen = prefixlen;
}
}
}
}
- else if (*buf == 3)
+ else if (r_code == AccessReject)
{
- LOG(2, s, session[s].tunnel, " Authentication denied for %s\n", session[s].user);
-//FIXME: We should tear down the session here!
+ LOG(2, s, session[s].tunnel, " Authentication rejected for %s\n", session[s].user);
+ sessionkill(s, "Authentication rejected");
break;
}
else
{
// An ack for a stop or start record.
- LOG(3, s, t, " RADIUS accounting ack recv in state %s\n", radius_states[radius[r].state]);
+ LOG(3, s, t, " RADIUS accounting ack recv in state %s\n", radius_state(radius[r].state));
break;
}
} while (0);
}
// Send a retry for RADIUS/CHAP message
-void radiusretry(u16 r)
+void radiusretry(uint16_t r)
{
sessionidt s = radius[r].session;
tunnelidt t = 0;
- CSTAT(call_radiusretry);
+ CSTAT(radiusretry);
+
+ if (s) t = session[s].tunnel;
- if (s)
- t = session[s].tunnel;
- radius[r].retry = backoff(radius[r].try + 1);
switch (radius[r].state)
{
- case RADIUSCHAP: // sending CHAP down PPP
+ case RADIUSCHAP: // sending CHAP down PPP
sendchap(t, s);
break;
case RADIUSIPCP:
- sendipcp(t, s); // send IPCP
+ sendipcp(t, s); // send IPCP
break;
- case RADIUSAUTH: // sending auth to RADIUS server
+ case RADIUSAUTH: // sending auth to RADIUS server
radiussend(r, RADIUSAUTH);
break;
- case RADIUSSTART: // sending start accounting to RADIUS server
+ case RADIUSSTART: // sending start accounting to RADIUS server
radiussend(r, RADIUSSTART);
break;
- case RADIUSSTOP: // sending stop accounting to RADIUS server
+ case RADIUSSTOP: // sending stop accounting to RADIUS server
radiussend(r, RADIUSSTOP);
break;
+ case RADIUSINTERIM: // sending interim accounting to RADIUS server
+ radiussend(r, RADIUSINTERIM);
+ break;
default:
- case RADIUSNULL: // Not in use
- case RADIUSWAIT: // waiting timeout before available, in case delayed reply from RADIUS server
+ case RADIUSNULL: // Not in use
+ case RADIUSWAIT: // waiting timeout before available, in case delayed reply from RADIUS server
// free up RADIUS task
radiusclear(r, s);
LOG(3, s, session[s].tunnel, "Freeing up radius session %d\n", r);
projects / l2tpns.git / blobdiff