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[l2tpns.git] / radius.c

diff --git a/radius.c b/radius.c
index c388ac3..8c7bf64 100644 (file)
--- a/radius.c
+++ b/radius.c
@@ -1,6 +1,6 @@
 // L2TPNS Radius Stuff
 
-char const *cvs_id_radius = "$Id: radius.c,v 1.40 2005/08/12 13:48:19 bodea Exp $";
+char const *cvs_id_radius = "$Id: radius.c,v 1.46 2005/12/09 00:43:17 bodea Exp $";
 
 #include <time.h>
 #include <stdio.h>
@@ -27,6 +27,20 @@ extern configt *config;
 extern int *radfds;
 extern ip_filtert *ip_filters;
 
+static const hasht zero;
+
+static void calc_auth(const void *buf, size_t len, const uint8_t *in, uint8_t *out)
+{
+       MD5_CTX ctx;
+
+       MD5_Init(&ctx);
+       MD5_Update(&ctx, (void *)buf, 4); // code, id, length
+       MD5_Update(&ctx, (void *)in, 16); // auth
+       MD5_Update(&ctx, (void *)(buf + 20), len - 20);
+       MD5_Update(&ctx, config->radiussecret, strlen(config->radiussecret));
+       MD5_Final(out, &ctx);
+}
+
 // Set up socket for radius requests
 void initrad(void)
 {
@@ -292,16 +306,9 @@ void radiussend(uint16_t r, uint8_t state)
                                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((char *) p + 8, "intercept=%s:%d",
-                                       fmtaddr(session[s].snoop_ip, 0), session[s].snoop_port);
-
-                               p[1] = p[7] + 6;
-                               p += p[1];
+                               struct param_radius_account acct = { &tunnel[session[s].tunnel], &session[s], &p };
+                               run_plugins(PLUGIN_RADIUS_ACCOUNT, &acct);
                        }
                }
        }
@@ -319,6 +326,30 @@ void radiussend(uint16_t r, uint8_t state)
                *(uint32_t *) (p + 2) = htonl(session[s].ip);
                p += p[1];
        }
+       if (s && session[s].route[0].ip)
+       {
+               int r;
+               for (r = 0; s && r < MAXROUTE && session[s].route[r].ip; r++)
+               {
+                       int width = 32;
+                       if (session[s].route[r].mask)
+                       {
+                           int mask = session[s].route[r].mask;
+                           while (!(mask & 1))
+                           {
+                               width--;
+                               mask >>= 1;
+                           }
+                       }
+
+                       *p = 22;        // Framed-Route
+                       p[1] = sprintf((char *) p + 2, "%s/%d %s 1",
+                               fmtaddr(htonl(session[s].route[r].ip), 0),
+                               width, fmtaddr(htonl(session[s].ip), 1)) + 2;
+
+                       p += p[1];
+               }
+       }
        if (*session[s].called)
        {
                *p = 30;                // called
@@ -326,7 +357,7 @@ void radiussend(uint16_t r, uint8_t state)
                strcpy((char *) p + 2, session[s].called);
                p += p[1];
        }
-       else if (*session[s].calling)
+       if (*session[s].calling)
        {
                *p = 31;                // calling
                p[1] = strlen(session[s].calling) + 2;
@@ -343,18 +374,9 @@ void radiussend(uint16_t r, uint8_t state)
        *(uint16_t *) (b + 2) = htons(p - b);
        if (state != RADIUSAUTH)
        {
-           // Build auth for accounting packet
-           uint8_t z[16] = {0};
-           uint8_t hash[16] = {0};
-           MD5_CTX ctx;
-           MD5_Init(&ctx);
-           MD5_Update(&ctx, b, 4);
-           MD5_Update(&ctx, z, 16);
-           MD5_Update(&ctx, b + 20, (p - b) - 20);
-           MD5_Update(&ctx, config->radiussecret, strlen(config->radiussecret));
-           MD5_Final(hash, &ctx);
-           memcpy(b + 4, hash, 16);
-           memcpy(radius[r].auth, hash, 16);
+               // Build auth for accounting packet
+               calc_auth(b, p - b, zero, b + 4);
+               memcpy(radius[r].auth, b + 4, 16);
        }
        memset(&addr, 0, sizeof(addr));
        addr.sin_family = AF_INET;
@@ -414,8 +436,7 @@ static void handle_avpair(sessionidt s, uint8_t *avp, int len)
 // process RADIUS response
 void processrad(uint8_t *buf, int len, char socket_index)
 {
-       uint8_t b[MAXCONTROL];
-       MD5_CTX ctx;
+       uint8_t b[MAXETHER];
        uint16_t r;
        sessionidt s;
        tunnelidt t = 0;
@@ -454,12 +475,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
                return;
        }
        t = session[s].tunnel;
-       MD5_Init(&ctx);
-       MD5_Update(&ctx, buf, 4);
-       MD5_Update(&ctx, radius[r].auth, 16);
-       MD5_Update(&ctx, buf + 20, len - 20);
-       MD5_Update(&ctx, config->radiussecret, strlen(config->radiussecret));
-       MD5_Final(hash, &ctx);
+       calc_auth(buf, len, radius[r].auth, hash);
        do {
                if (memcmp(hash, buf + 4, 16))
                {
@@ -762,8 +778,8 @@ extern int daefd;
 void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
 {
        int i, r_code, r_id, length, attribute_length;
-       uint8_t vector[16], hash[16], *packet, attribute;
-       MD5_CTX ctx;
+       uint8_t *packet, attribute;
+       hasht hash;
        char username[MAXUSER] = "";
        in_addr_t nas = 0;
        in_addr_t ip = 0;
@@ -808,17 +824,8 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
        LOG(3, 0, 0, "Received DAE %s, id %d\n", radius_code(r_code), r_id);
 
        // check authenticator
-       memcpy(vector, buf + 4, 16);
-       memset(buf + 4, 0, 16);
-
-       i = strlen(config->radiussecret);
-       if (i > 16) i = 16;
-
-       MD5_Init(&ctx);
-       MD5_Update(&ctx, buf, len);
-       MD5_Update(&ctx, config->radiussecret, i);
-       MD5_Final(hash, &ctx);
-       if (memcmp(hash, vector, 16) != 0)
+       calc_auth(buf, len, zero, hash);
+       if (memcmp(hash, buf + 4, 16) != 0)
        {
                LOG(1, 0, 0, "Incorrect vector in DAE request (wrong secret in radius config?)\n");
                return;
@@ -1024,10 +1031,9 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
        packet = buf;
        *packet++ = r_code;
        *packet++ = r_id;
-       packet += 2;
-       memset(packet, 0, 16);
-       packet += 16;
-       len = 20;
+       // skip len + auth
+       packet += 2 + 16;
+       len = packet - buf;
 
        // add attributes
        if (error)
@@ -1042,14 +1048,7 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
        *((uint16_t *)(buf + 2)) = htons(len);
 
        // make vector
-       i = strlen(config->radiussecret);
-       if (i > 16) i = 16;
-
-       MD5_Init(&ctx);
-       MD5_Update(&ctx, buf, len);
-       MD5_Update(&ctx, config->radiussecret, i);
-       MD5_Final(hash, &ctx);
-       memcpy(buf + 4, hash, 16);
+       calc_auth(buf, len, hash, buf + 4);
 
        LOG(3, 0, 0, "Sending DAE %s, id=%d\n", radius_code(r_code), r_id);