use bounds-checking lookup functions for string constants
replace some magic numbers with enum
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bodea
parent
053ef4c8e0
commit
c8ec92d66c
1 changed files with 46 additions and 54 deletions
98
radius.c
98
radius.c
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@ -1,6 +1,6 @@
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// L2TPNS Radius Stuff
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char const *cvs_id_radius = "$Id: radius.c,v 1.20 2004/12/16 08:49:53 bodea Exp $";
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char const *cvs_id_radius = "$Id: radius.c,v 1.21 2005/01/05 13:45:49 bodea Exp $";
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#include <time.h>
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#include <stdio.h>
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@ -25,18 +25,6 @@ extern configt *config;
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extern int *radfds;
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extern ip_filtert *ip_filters;
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static const char *radius_state(int state)
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{
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static char *tmp = NULL;
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int i;
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for (i = 0; radius_states[i]; i++)
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if (i == state) return radius_states[i];
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if (tmp == NULL) tmp = (char *)calloc(64, 1);
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sprintf(tmp, "%d", state);
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return tmp;
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}
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// Set up socket for radius requests
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void initrad(void)
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{
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@ -58,7 +46,6 @@ void radiusclear(uint16_t r, sessionidt s)
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memset(&radius[r], 0, sizeof(radius[r])); // radius[r].state = RADIUSNULL;
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}
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static uint16_t get_free_radius()
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{
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int count;
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@ -118,7 +105,7 @@ void radiussend(uint16_t r, uint8_t state)
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uint8_t *p;
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sessionidt s;
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CSTAT(call_radiussend);
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CSTAT(radiussend);
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s = radius[r].session;
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if (!config->numradiusservers)
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@ -141,6 +128,7 @@ void radiussend(uint16_t r, uint8_t state)
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if (radius[r].state != state)
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radius[r].try = 0;
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radius[r].state = state;
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radius[r].retry = backoff(radius[r].try++);
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LOG(4, s, session[s].tunnel, "Send RADIUS id %d sock %d state %s try %d\n",
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@ -156,7 +144,7 @@ void radiussend(uint16_t r, uint8_t state)
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else
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{
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LOG(1, s, session[s].tunnel, "RADIUS timeout, but in state %s so don't timeout session\n",
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radius_states[state]);
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radius_state(state));
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radiusclear(r, s);
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}
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STAT(radius_timeout);
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@ -369,14 +357,10 @@ void processrad(uint8_t *buf, int len, char socket_index)
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tunnelidt t = 0;
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hasht hash;
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uint8_t routes = 0;
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int r_code;
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int r_id;
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int r_code, r_id ; // Radius code.
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r_code = buf[0]; // First byte in radius packet.
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r_id = buf[1]; // radius reply indentifier.
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CSTAT(call_processrad);
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CSTAT(processrad);
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LOG_HEX(5, "RADIUS Response", buf, len);
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if (len < 20 || len < ntohs(*(uint16_t *) (buf + 2)))
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@ -384,11 +368,16 @@ void processrad(uint8_t *buf, int len, char socket_index)
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LOG(1, 0, 0, "Duff RADIUS response length %d\n", len);
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return ;
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}
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r_code = buf[0]; // response type
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r_id = buf[1]; // radius reply indentifier.
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len = ntohs(*(uint16_t *) (buf + 2));
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r = socket_index | (r_id << RADIUS_SHIFT);
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s = radius[r].session;
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LOG(3, s, session[s].tunnel, "Received %s, radius %d response for session %u (code %d, id %d)\n",
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radius_states[radius[r].state], r, s, r_code, r_id);
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LOG(3, s, session[s].tunnel, "Received %s, radius %d response for session %u (%s, id %d)\n",
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radius_state(radius[r].state), r, s, radius_code(r_code), r_id);
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if (!s && radius[r].state != RADIUSSTOP)
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{
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LOG(1, s, session[s].tunnel, " Unexpected RADIUS response\n");
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@ -412,16 +401,29 @@ void processrad(uint8_t *buf, int len, char socket_index)
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LOG(0, s, session[s].tunnel, " Incorrect auth on RADIUS response!! (wrong secret in radius config?)\n");
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return; // Do nothing. On timeout, it will try the next radius server.
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}
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if ((radius[r].state == RADIUSAUTH && *buf != 2 && *buf != 3) ||
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((radius[r].state == RADIUSSTART || radius[r].state == RADIUSSTOP) && *buf != 5))
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if ((radius[r].state == RADIUSAUTH && r_code != AccessAccept && r_code != AccessReject) ||
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((radius[r].state == RADIUSSTART || radius[r].state == RADIUSSTOP) && r_code != AccountingResponse))
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{
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LOG(1, s, session[s].tunnel, " Unexpected RADIUS response %d\n", *buf);
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LOG(1, s, session[s].tunnel, " Unexpected RADIUS response %s\n", radius_code(r_code));
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return; // We got something we didn't expect. Let the timeouts take
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// care off finishing the radius session if that's really correct.
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}
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if (radius[r].state == RADIUSAUTH)
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{
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LOG(4, s, session[s].tunnel, " Original response is \"%s\"\n", (*buf == 2) ? "accept" : "reject");
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// run post-auth plugin
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struct param_post_auth packet = {
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&tunnel[t],
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&session[s],
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session[s].user,
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(r_code == AccessAccept),
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radius[r].chap ? PPPCHAP : PPPPAP
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};
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run_plugins(PLUGIN_POST_AUTH, &packet);
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r_code = packet.auth_allowed ? AccessAccept : AccessReject;
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// process auth response
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if (radius[r].chap)
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{
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@ -429,18 +431,13 @@ void processrad(uint8_t *buf, int len, char socket_index)
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uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPCHAP);
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if (!p) return; // Abort!
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{
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struct param_post_auth packet = { &tunnel[t], &session[s], session[s].user, (*buf == 2), PPPCHAP };
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run_plugins(PLUGIN_POST_AUTH, &packet);
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*buf = packet.auth_allowed ? 2 : 3;
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}
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LOG(3, s, session[s].tunnel, " CHAP User %s authentication %s.\n", session[s].user,
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(*buf == 2) ? "allowed" : "denied");
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*p = (*buf == 2) ? 3 : 4; // ack/nak
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*p = (r_code == AccessAccept) ? 3 : 4; // ack/nak
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p[1] = radius[r].id;
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*(uint16_t *) (p + 2) = ntohs(4); // no message
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tunnelsend(b, (p - b) + 4, t); // send it
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LOG(3, s, session[s].tunnel, " CHAP User %s authentication %s.\n", session[s].user,
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(r_code == AccessAccept) ? "allowed" : "denied");
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}
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else
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{
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@ -448,23 +445,18 @@ void processrad(uint8_t *buf, int len, char socket_index)
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uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPPAP);
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if (!p) return; // Abort!
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{
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struct param_post_auth packet = { &tunnel[t], &session[s], session[s].user, (*buf == 2), PPPPAP };
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run_plugins(PLUGIN_POST_AUTH, &packet);
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*buf = packet.auth_allowed ? 2 : 3;
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}
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LOG(3, s, session[s].tunnel, " PAP User %s authentication %s.\n", session[s].user,
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(*buf == 2) ? "allowed" : "denied");
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// ack/nak
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*p = *buf;
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*p = r_code;
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p[1] = radius[r].id;
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*(uint16_t *) (p + 2) = ntohs(5);
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p[4] = 0; // no message
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tunnelsend(b, (p - b) + 5, t); // send it
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LOG(3, s, session[s].tunnel, " PAP User %s authentication %s.\n", session[s].user,
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(r_code == AccessAccept) ? "allowed" : "denied");
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}
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if (*buf == 2)
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if (r_code == AccessAccept)
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{
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// Login successful
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// Extract IP, routes, etc
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@ -631,7 +623,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
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}
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}
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}
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else if (*buf == 3)
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else if (r_code == AccessReject)
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{
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LOG(2, s, session[s].tunnel, " Authentication denied for %s\n", session[s].user);
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//FIXME: We should tear down the session here!
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@ -656,7 +648,7 @@ void processrad(uint8_t *buf, int len, char socket_index)
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else
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{
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// An ack for a stop or start record.
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LOG(3, s, t, " RADIUS accounting ack recv in state %s\n", radius_states[radius[r].state]);
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LOG(3, s, t, " RADIUS accounting ack recv in state %s\n", radius_state(radius[r].state));
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break;
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}
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} while (0);
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@ -671,10 +663,10 @@ void radiusretry(uint16_t r)
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sessionidt s = radius[r].session;
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tunnelidt t = 0;
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CSTAT(call_radiusretry);
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CSTAT(radiusretry);
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if (s) t = session[s].tunnel;
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if (s)
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t = session[s].tunnel;
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radius[r].retry = backoff(radius[r].try + 1);
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switch (radius[r].state)
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{
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