Use multiple radius sockets to allow more concurrent authentication requests
This commit is contained in:
David Parrish
parent
11627344e7
commit
f764cfffe6
2 changed files with 95 additions and 60 deletions
151
radius.c
151
radius.c
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@ -1,5 +1,5 @@
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// L2TPNS Radius Stuff
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// $Id: radius.c,v 1.2 2004-03-05 00:09:03 fred_nerk Exp $
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// $Id: radius.c,v 1.3 2004-05-24 04:27:11 fred_nerk Exp $
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#include <time.h>
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#include <stdio.h>
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@ -7,6 +7,7 @@
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#include <sys/socket.h>
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#include <malloc.h>
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#include <string.h>
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#include <fcntl.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <netinet/in.h>
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@ -20,9 +21,9 @@ extern radiust *radius;
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extern sessiont *session;
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extern tunnelt *tunnel;
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extern u32 sessionid;
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extern int radfd;
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extern struct Tstats *_statistics;
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extern struct configt *config;
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extern int *radfds;
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const char *radius_state(int state)
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{
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@ -39,30 +40,51 @@ const char *radius_state(int state)
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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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radfd = socket(AF_INET, SOCK_DGRAM, UDP);
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int i;
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log(3, 0, 0, 0, "Creating %d sockets for RADIUS queries\n", config->num_radfds);
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radfds = calloc(sizeof(int), config->num_radfds);
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for (i = 0; i < config->num_radfds; i++)
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{
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int flags;
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if (!radfds[i]) radfds[i] = socket(AF_INET, SOCK_DGRAM, UDP);
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flags = fcntl(radfds[i], F_GETFL, 0);
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fcntl(radfds[i], F_SETFL, flags | O_NONBLOCK);
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}
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}
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void radiusclear(u8 r, sessionidt s)
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void radiusclear(u16 r, sessionidt s)
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{
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if (s) session[s].radius = 0;
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memset(&radius[r], 0, sizeof(radius[r])); // radius[r].state = RADIUSNULL;
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}
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static u8 new_radius()
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int next_radius_id = 1;
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static u16 new_radius()
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{
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u8 i;
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for (i = 1; i < MAXRADIUS; i++)
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u16 i;
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int loops = 0;
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for (i = next_radius_id; ; i = (i + 1) % MAXRADIUS)
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{
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if (radius[i].state == RADIUSNULL)
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{
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next_radius_id = (next_radius_id + 1) % MAXRADIUS;
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return i;
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}
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if (next_radius_id == i)
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{
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if (++loops == 2)
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{
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log(0, 0, 0, 0, "Can't find a free radius session! This is very bad!\n");
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return 0;
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}
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}
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}
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log(0, 0, 0, 0, "Can't find a free radius session! This could be bad!\n");
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return 0;
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}
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u8 radiusnew(sessionidt s)
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u16 radiusnew(sessionidt s)
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{
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u8 r;
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u16 r;
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if (!(r = new_radius()))
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{
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log(1, 0, s, session[s].tunnel, "No free RADIUS sessions\n");
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@ -77,7 +99,7 @@ u8 radiusnew(sessionidt s)
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}
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// Send a RADIUS request
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void radiussend(u8 r, u8 state)
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void radiussend(u16 r, u8 state)
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{
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struct sockaddr_in addr;
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u8 b[4096]; // RADIUS packet
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@ -111,12 +133,21 @@ void radiussend(u8 r, u8 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, 0, s, session[s].tunnel, "Send RADIUS %d state %s try %d\n", r, radius_state(radius[r].state), radius[r].try);
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log(4, 0, s, session[s].tunnel, "Send RADIUS id %d sock %d state %s try %d\n",
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r >> RADIUS_SHIFT, r & RADIUS_MASK,
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radius_state(radius[r].state), radius[r].try);
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if (radius[r].try > config->numradiusservers * 2)
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{
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if (s)
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{
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sessionshutdown(s, "RADIUS timeout");
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if (state == RADIUSAUTH)
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sessionshutdown(s, "RADIUS timeout");
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else
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{
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log(1, 0, 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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radiusclear(r, s);
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}
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STAT(radius_timeout);
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}
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else
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@ -130,17 +161,17 @@ void radiussend(u8 r, u8 state)
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// contruct RADIUS access request
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switch (state)
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{
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case RADIUSAUTH:
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b[0] = 1; // access request
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break;
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case RADIUSSTART:
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case RADIUSSTOP:
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b[0] = 4; // accounting request
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break;
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default:
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log(0, 0, 0, 0, "Unknown radius state %d\n", state);
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case RADIUSAUTH:
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b[0] = 1; // access request
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break;
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case RADIUSSTART:
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case RADIUSSTOP:
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b[0] = 4; // accounting request
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break;
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default:
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log(0, 0, 0, 0, "Unknown radius state %d\n", state);
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}
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b[1] = r; // identifier
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b[1] = r >> RADIUS_SHIFT; // identifier
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memcpy(b + 4, radius[r].auth, 16);
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p = b + 20;
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if (s)
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@ -307,15 +338,15 @@ void radiussend(u8 r, u8 state)
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addr.sin_port = htons((state == RADIUSAUTH) ? RADPORT : RADAPORT);
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log_hex(5, "RADIUS Send", b, (p - b));
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sendto(radfd, b, p - b, 0, (void *) &addr, sizeof(addr));
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sendto(radfds[r & RADIUS_MASK], b, p - b, 0, (void *) &addr, sizeof(addr));
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}
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// process RADIUS response
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void processrad(u8 * buf, int len)
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void processrad(u8 *buf, int len, char socket_index)
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{
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u8 b[MAXCONTROL];
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MD5_CTX ctx;
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u8 r;
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u16 r;
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sessionidt s;
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tunnelidt t = 0;
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hasht hash;
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@ -331,9 +362,10 @@ void processrad(u8 * buf, int len)
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return ;
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}
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len = ntohs(*(u16 *) (buf + 2));
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r = buf[1];
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r = socket_index | (buf[1] << RADIUS_SHIFT);
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s = radius[r].session;
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log(3, 0, s, session[s].tunnel, "Received %s, radius %d response for session %u\n", radius_states[radius[r].state], r, s);
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log(3, 0, s, session[s].tunnel, "Received %s, radius %d response for session %u\n",
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radius_states[radius[r].state], r, s);
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if (!s && radius[r].state != RADIUSSTOP)
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{
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log(1, 0, s, session[s].tunnel, " Unexpected RADIUS response\n");
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@ -473,9 +505,12 @@ void processrad(u8 * buf, int len)
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}
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else
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{
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log(3, 0, s, session[s].tunnel, " Radius reply contains route for %d/%d\n",
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inet_toa(ip),
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inet_toa(mask));
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char *ips, *masks;
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ips = strdup(inet_toa(ip));
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masks = strdup(inet_toa(mask));
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log(3, 0, s, session[s].tunnel, " Radius reply contains route for %s/%s\n", ips, masks);
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free(ips);
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free(masks);
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session[s].route[routes].ip = ip;
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session[s].route[routes].mask = mask;
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routes++;
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@ -540,7 +575,7 @@ void processrad(u8 * buf, int len)
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log(3, 0, s, t, " No IP allocated by radius. Assigned %s from pool\n",
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inet_toa(htonl(session[s].ip)));
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else
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log(3, 0, s, t, " No IP allocated by radius. None available in pool\n");
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log(0, 0, s, t, " No IP allocated by radius. The IP address pool is FULL!\n");
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}
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if (!session[s].dns1 && config->default_dns1)
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{
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@ -567,7 +602,7 @@ void processrad(u8 * buf, int len)
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}
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else
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{
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log(3, 0, s, t, " RADIUS response in state %d\n", radius[r].state);
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log(3, 0, s, t, " RADIUS response in state %s\n", radius_states[radius[r].state]);
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}
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} while (0);
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@ -576,7 +611,7 @@ void processrad(u8 * buf, int len)
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}
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// Send a retry for RADIUS/CHAP message
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void radiusretry(u8 r)
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void radiusretry(u16 r)
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{
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sessionidt s = radius[r].session;
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tunnelidt t = 0;
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@ -585,31 +620,31 @@ void radiusretry(u8 r)
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#endif
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if (s)
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t = session[s].tunnel;
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radius[r].retry = 0;
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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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case RADIUSCHAP: // sending CHAP down PPP
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sendchap(t, s);
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break;
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case RADIUSIPCP:
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sendipcp(t, s); // send IPCP
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break;
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case RADIUSAUTH: // sending auth to RADIUS server
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radiussend(r, RADIUSAUTH);
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break;
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case RADIUSSTART: // sending start accounting to RADIUS server
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radiussend(r, RADIUSSTART);
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break;
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case RADIUSSTOP: // sending stop accounting to RADIUS server
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radiussend(r, RADIUSSTOP);
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break;
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default:
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case RADIUSNULL: // Not in use
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case RADIUSWAIT: // waiting timeout before available, in case delayed reply from RADIUS server
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// free up RADIUS task
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radiusclear(r, s);
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log(3, 0, s, session[s].tunnel, "Freeing up radius session %d\n", r);
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break;
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case RADIUSCHAP: // sending CHAP down PPP
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sendchap(t, s);
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break;
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case RADIUSIPCP:
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sendipcp(t, s); // send IPCP
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break;
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case RADIUSAUTH: // sending auth to RADIUS server
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radiussend(r, RADIUSAUTH);
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break;
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case RADIUSSTART: // sending start accounting to RADIUS server
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radiussend(r, RADIUSSTART);
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break;
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case RADIUSSTOP: // sending stop accounting to RADIUS server
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radiussend(r, RADIUSSTOP);
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break;
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default:
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case RADIUSNULL: // Not in use
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case RADIUSWAIT: // waiting timeout before available, in case delayed reply from RADIUS server
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// free up RADIUS task
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radiusclear(r, s);
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log(3, 0, s, session[s].tunnel, "Freeing up radius session %d\n", r);
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break;
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}
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}
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