convert manual.html to docbook

[l2tpns.git] / radius.c

diff --git a/radius.c b/radius.c
index 8799622..dd8a3e6 100644 (file)
--- a/radius.c
+++ b/radius.c
@@ -1,6 +1,6 @@
 // L2TPNS Radius Stuff
 
 // L2TPNS Radius Stuff
 

-char const *cvs_id_radius = "$Id: radius.c,v 1.37 2005/07/31 10:04:10 bodea Exp $";
+char const *cvs_id_radius = "$Id: radius.c,v 1.50 2006/04/27 09:53:50 bodea Exp $";

 
 #include <time.h>
 #include <stdio.h>
 
 #include <time.h>
 #include <stdio.h>


@@ -13,7 +13,7 @@ char const *cvs_id_radius = "$Id: radius.c,v 1.37 2005/07/31 10:04:10 bodea Exp
 #include <ctype.h>
 #include <netinet/in.h>
 #include <errno.h>
 #include <ctype.h>
 #include <netinet/in.h>
 #include <errno.h>

-#include <openssl/md5.h>
+#include "md5.h"

 #include "constants.h"
 #include "l2tpns.h"
 #include "plugin.h"
 #include "constants.h"
 #include "l2tpns.h"
 #include "plugin.h"


@@ -27,6 +27,20 @@ extern configt *config;
 extern int *radfds;
 extern ip_filtert *ip_filters;
 
 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)
 {
 // Set up socket for radius requests
 void initrad(void)
 {


@@ -144,7 +158,7 @@ void radiussend(uint16_t r, uint8_t state)
                if (s)
                {
                        if (state == RADIUSAUTH)
                if (s)
                {
                        if (state == RADIUSAUTH)

-                               sessionshutdown(s, "RADIUS timeout.", 3, 0);
+                               sessionshutdown(s, "RADIUS timeout.", CDN_ADMIN_DISC, TERM_REAUTHENTICATION_FAILURE);

                        else
                        {
                                LOG(1, s, session[s].tunnel, "RADIUS timeout, but in state %s so don't timeout session\n",
                        else
                        {
                                LOG(1, s, session[s].tunnel, "RADIUS timeout, but in state %s so don't timeout session\n",


@@ -234,8 +248,8 @@ void radiussend(uint16_t r, uint8_t state)
                        p += p[1];
                }
        }
                        p += p[1];
                }
        }

-       else if (state == RADIUSSTART || state == RADIUSSTOP || state == RADIUSINTERIM)
-       {                       // accounting
+       else // accounting
+       {

                *p = 40;        // accounting type
                p[1] = 6;
                *(uint32_t *) (p + 2) = htonl(state - RADIUSSTART + 1); // start=1, stop=2, interim=3
                *p = 40;        // accounting type
                p[1] = 6;
                *(uint32_t *) (p + 2) = htonl(state - RADIUSSTART + 1); // start=1, stop=2, interim=3


@@ -265,13 +279,11 @@ void radiussend(uint16_t r, uint8_t state)
                                p[1] = 6;
                                *(uint32_t *) (p + 2) = htonl(session[s].cout);
                                p += p[1];
                                p[1] = 6;
                                *(uint32_t *) (p + 2) = htonl(session[s].cout);
                                p += p[1];

-                               if (state == RADIUSSTOP)
-                               {
-                                       *p = 46;        // session time
-                                       p[1] = 6;
-                                       *(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened);
-                                       p += p[1];
-                               }
+
+                               *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;
 
                                *p = 47;        // input packets
                                p[1] = 6;


@@ -292,27 +304,48 @@ void radiussend(uint16_t r, uint8_t state)
                                p[1] = 6;
                                *(uint32_t *) (p + 2) = htonl(session[s].cout_wrap);
                                p += p[1];
                                p[1] = 6;
                                *(uint32_t *) (p + 2) = htonl(session[s].cout_wrap);
                                p += p[1];

+
+                               if (state == RADIUSSTOP && radius[r].term_cause)
+                               {
+                                       *p = 49; // acct-terminate-cause
+                                       p[1] = 6;
+                                       *(uint32_t *) (p + 2) = htonl(radius[r].term_cause);
+                                       p += p[1];
+
+                                       if (radius[r].term_msg)
+                                       {
+                                               *p = 26;                                // vendor-specific
+                                               *(uint32_t *) (p + 2) = htonl(9);       // Cisco
+                                               p[6] = 1;                               // Cisco-AVPair
+                                               p[7] = 2 + sprintf((char *) p + 8, "disc-cause-ext=%s", radius[r].term_msg);
+                                               p[1] = p[7] + 6;
+                                               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);

                        }
                }
        }
        if (s)
        {
                        }
                }
        }
        if (s)
        {

-               *p = 5; // NAS-Port
+               *p = 5;         // NAS-Port

                p[1] = 6;
                *(uint32_t *) (p + 2) = htonl(s);
                p += p[1];
                p[1] = 6;
                *(uint32_t *) (p + 2) = htonl(s);
                p += p[1];

+
+               *p = 6;         // Service-Type
+               p[1] = 6;
+               *(uint32_t *) (p + 2) = htonl(2); // Framed-User
+               p += p[1];
+                  
+               *p = 7;         // Framed-Protocol
+               p[1] = 6;
+               *(uint32_t *) (p + 2) = htonl(1); // PPP
+               p += p[1];

        }
        if (s && session[s].ip)
        {
        }
        if (s && session[s].ip)
        {


@@ -321,6 +354,30 @@ void radiussend(uint16_t r, uint8_t state)
                *(uint32_t *) (p + 2) = htonl(session[s].ip);
                p += p[1];
        }
                *(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
        if (*session[s].called)
        {
                *p = 30;                // called


@@ -328,7 +385,7 @@ void radiussend(uint16_t r, uint8_t state)
                strcpy((char *) p + 2, session[s].called);
                p += p[1];
        }
                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;
        {
                *p = 31;                // calling
                p[1] = strlen(session[s].calling) + 2;


@@ -345,18 +402,9 @@ void radiussend(uint16_t r, uint8_t state)
        *(uint16_t *) (b + 2) = htons(p - b);
        if (state != RADIUSAUTH)
        {
        *(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;
        }
        memset(&addr, 0, sizeof(addr));
        addr.sin_family = AF_INET;


@@ -416,8 +464,7 @@ static void handle_avpair(sessionidt s, uint8_t *avp, int len)
 // process RADIUS response
 void processrad(uint8_t *buf, int len, char socket_index)
 {
 // 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;
        uint16_t r;
        sessionidt s;
        tunnelidt t = 0;


@@ -456,12 +503,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
                return;
        }
        t = session[s].tunnel;
                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))
                {
        do {
                if (memcmp(hash, buf + 4, 16))
                {


@@ -495,7 +537,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
                        if (radius[r].chap)
                        {
                                // CHAP
                        if (radius[r].chap)
                        {
                                // CHAP

-                               uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPCHAP);
+                               uint8_t *p = makeppp(b, sizeof(b), 0, 0, s, t, PPPCHAP, 0, 0, 0);

                                if (!p) return; // Abort!
 
                                *p = (r_code == AccessAccept) ? 3 : 4;     // ack/nak
                                if (!p) return; // Abort!
 
                                *p = (r_code == AccessAccept) ? 3 : 4;     // ack/nak


@@ -509,7 +551,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
                        else
                        {
                                // PAP
                        else
                        {
                                // PAP

-                               uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPPAP);
+                               uint8_t *p = makeppp(b, sizeof(b), 0, 0, s, t, PPPPAP, 0, 0, 0);

                                if (!p) return;         // Abort!
 
                                // ack/nak
                                if (!p) return;         // Abort!
 
                                // ack/nak


@@ -551,6 +593,19 @@ void processrad(uint8_t *buf, int len, char socket_index)
                                                LOG(3, s, session[s].tunnel, "   Radius reply contains primary DNS address %s\n",
                                                        fmtaddr(htonl(session[s].dns1), 0));
                                        }
                                                LOG(3, s, session[s].tunnel, "   Radius reply contains primary DNS address %s\n",
                                                        fmtaddr(htonl(session[s].dns1), 0));
                                        }

+                                       else if (*p == 27)
+                                       {
+                                               // Session timeout
+                                               if (p[1] < 6) {
+                                                       LOG(2, s, session[s].tunnel, "Error: Received Session timeout with length %d < 6\n", p[1]);
+                                                       continue;
+                                               }
+
+                                               session[s].timeout = ntohl(*(uint32_t *) (p + 2));
+                                               LOG(3, s, session[s].tunnel, "   Radius reply contains Session timeout %d\n", session[s].timeout);
+                                               if (!session[s].timeout)
+                                                       sessionshutdown(s, "Session timeout is zero", CDN_ADMIN_DISC, TERM_SESSION_TIMEOUT);
+                                       }

                                        else if (*p == 136)
                                        {
                                                // DNS address
                                        else if (*p == 136)
                                        {
                                                // DNS address


@@ -714,7 +769,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
 
                        // Valid Session, set it up
                        session[s].unique_id = 0;
 
                        // Valid Session, set it up
                        session[s].unique_id = 0;

-                       sessionsetup(t, s);
+                       sessionsetup(s, t);

                }
                else
                {
                }
                else
                {


@@ -741,7 +796,7 @@ void radiusretry(uint16_t r)
        switch (radius[r].state)
        {
                case RADIUSCHAP:        // sending CHAP down PPP
        switch (radius[r].state)
        {
                case RADIUSCHAP:        // sending CHAP down PPP

-                       sendchap(t, s);
+                       sendchap(s, t);

                        break;
                case RADIUSAUTH:        // sending auth to RADIUS server
                case RADIUSSTART:       // sending start accounting to RADIUS server
                        break;
                case RADIUSAUTH:        // sending auth to RADIUS server
                case RADIUSSTART:       // sending start accounting to RADIUS server


@@ -761,11 +816,11 @@ void radiusretry(uint16_t r)
 
 extern int daefd;
 
 
 extern int daefd;
 

-void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
+void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local)

 {
        int i, r_code, r_id, length, attribute_length;
 {
        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;
        char username[MAXUSER] = "";
        in_addr_t nas = 0;
        in_addr_t ip = 0;


@@ -810,17 +865,8 @@ 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
        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;
        {
                LOG(1, 0, 0, "Incorrect vector in DAE request (wrong secret in radius config?)\n");
                return;


@@ -979,7 +1025,7 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
                LOG(3, s, t, "    DAE Disconnect %d (%s)\n", s, session[s].user);
                r_code = DisconnectACK;
 
                LOG(3, s, t, "    DAE Disconnect %d (%s)\n", s, session[s].user);
                r_code = DisconnectACK;
 

-               sessionshutdown(s, "Requested by PoD", 3, 0); // disconnect session
+               sessionshutdown(s, "Requested by PoD", CDN_ADMIN_DISC, TERM_ADMIN_RESET); // disconnect session

                break;
 
        case CoARequest: // Change of Authorization
                break;
 
        case CoARequest: // Change of Authorization


@@ -1026,10 +1072,9 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
        packet = buf;
        *packet++ = r_code;
        *packet++ = r_id;
        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)
 
        // add attributes
        if (error)


@@ -1044,18 +1089,11 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen)
        *((uint16_t *)(buf + 2)) = htons(len);
 
        // make vector
        *((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);
 
        // send DAE response
 
        LOG(3, 0, 0, "Sending DAE %s, id=%d\n", radius_code(r_code), r_id);
 
        // send DAE response

-       if (sendto(daefd, buf, len, MSG_DONTWAIT | MSG_NOSIGNAL, (struct sockaddr *) addr, alen) < 0)
+       if (sendtofrom(daefd, buf, len, MSG_DONTWAIT | MSG_NOSIGNAL, (struct sockaddr *) addr, alen, local) < 0)

                LOG(0, 0, 0, "Error sending DAE response packet: %s\n", strerror(errno));
 }
                LOG(0, 0, 0, "Error sending DAE response packet: %s\n", strerror(errno));
 }