X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/e783c61413bb2b6adc841fc6155b39381f723c2e..ce928583b47102056e28201bd677f4813fada3c6:/l2tpns.c

diff --git a/l2tpns.c b/l2tpns.c
index 2d53ea2..7478560 100644
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -4,8 +4,6 @@
 // Copyright (c) 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd) - GPL licenced
 // vim: sw=8 ts=8
 
-char const *cvs_id_l2tpns = "$Id: l2tpns.c,v 1.176 2011/01/20 12:48:40 bodea Exp $";
-
 #include <arpa/inet.h>
 #include <assert.h>
 #include <errno.h>
@@ -104,6 +102,7 @@ uint32_t eth_tx = 0;
 
 static uint32_t ip_pool_size = 1;	// Size of the pool of addresses used for dynamic address allocation.
 time_t time_now = 0;			// Current time in seconds since epoch.
+uint64_t time_now_ms = 0;		// Current time in milliseconds since epoch.
 static char time_now_string[64] = {0};	// Current time as a string.
 static int time_changed = 0;		// time_now changed
 char main_quit = 0;			// True if we're in the process of exiting.
@@ -163,6 +162,8 @@ config_descriptt config_values[] = {
 	CONFIG("hostname", hostname, STRING),
 	CONFIG("nexthop_address", nexthop_address, IPv4),
 	CONFIG("nexthop6_address", nexthop6_address, IPv6),
+	CONFIG("echo_timeout", echo_timeout, INT),
+	CONFIG("idle_echo_timeout", idle_echo_timeout, INT),
 	{ NULL, 0, 0, 0 },
 };
 
@@ -242,6 +243,10 @@ static clockt now(double *f)
 	    time_now = t.tv_sec;
 	    time_changed++;
 	}
+
+	// Time in milliseconds
+	time_now_ms = (t.tv_sec * 1000) + (t.tv_usec/1000);
+
 	return (t.tv_sec - basetime) * 10 + t.tv_usec / 100000 + 1;
 }
 
@@ -1325,7 +1330,8 @@ static void update_session_out_stat(sessionidt s, sessiont *sp, int len)
 
 // process outgoing (to tunnel) IP
 //
-static void processipout(uint8_t *buf, int len)
+// (i.e. this routine writes to data[-8]).
+void processipout(uint8_t *buf, int len)
 {
 	sessionidt s;
 	sessiont *sp;
@@ -1464,64 +1470,111 @@ static void processipout(uint8_t *buf, int len)
 
 	if(session[s].bundle != 0 && bundle[session[s].bundle].num_of_links > 1)
 	{
+
+		if (!config->cluster_iam_master)
+		{
+			// The MPPP packets must be managed by the Master.
+			master_forward_mppp_packet(s, data, size);
+			return;
+		}
+
 		// Add on L2TP header
+		sessionidt members[MAXBUNDLESES];
 		bundleidt bid = session[s].bundle;
 		bundlet *b = &bundle[bid];
+		uint32_t num_of_links, nb_opened;
+		int i;
 
-		b->current_ses = (b->current_ses + 1) % b->num_of_links;
-		s = b->members[b->current_ses];
+		num_of_links = b->num_of_links;
+		nb_opened = 0;
+		for (i = 0;i < num_of_links;i++)
+		{
+			s = b->members[i];
+			if (session[s].ppp.lcp == Opened)
+			{
+				members[nb_opened] = s;
+				nb_opened++;
+			}
+		}
+
+		if (nb_opened < 1)
+		{
+			LOG(3, s, t, "MPPP: PROCESSIPOUT ERROR, no session opened in bundle:%d\n", bid);
+			return;
+		}
+
+		num_of_links = nb_opened;
+		b->current_ses = (b->current_ses + 1) % num_of_links;
+		s = members[b->current_ses];
 		t = session[s].tunnel;
 		sp = &session[s];
 		LOG(4, s, t, "MPPP: (1)Session number becomes: %d\n", s);
-		if(len > MINFRAGLEN)
-		{
-			// Partition the packet to "bundle[b].num_of_links" fragments
-			uint32_t num_of_links = b->num_of_links;
-			uint32_t fraglen = len / num_of_links;
-			fraglen = (fraglen > session[s].mru ? session[s].mru : fraglen);
-			uint32_t last_fraglen = fraglen + len % num_of_links;
-			last_fraglen = (last_fraglen > session[s].mru ? len % num_of_links : last_fraglen);
-			uint32_t remain = len;
-
-			// send the first packet
-			uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, fraglen, s, t, PPPIP, 0, bid, MP_BEGIN);
-			if (!p) return;
-			tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it...
-			// statistics
-			update_session_out_stat(s, sp, fraglen);
-			remain -= fraglen;
-			while (remain > last_fraglen)
-			{ 
+
+		if (num_of_links > 1)
+		{
+			if(len > MINFRAGLEN)
+			{
+				//for rotate traffic among the member links
+				uint32_t divisor = num_of_links;
+				if (divisor > 2)
+					divisor = divisor/2 + (divisor & 1);
+
+				// Partition the packet to "num_of_links" fragments
+				uint32_t fraglen = len / divisor;
+				uint32_t last_fraglen = fraglen + len % divisor;
+				uint32_t remain = len;
+
+				// send the first packet
+				uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, fraglen, s, t, PPPIP, 0, bid, MP_BEGIN);
+				if (!p) return;
+				tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it...
+
+				// statistics
+				update_session_out_stat(s, sp, fraglen);
+
+				remain -= fraglen;
+				while (remain > last_fraglen)
+				{
+					b->current_ses = (b->current_ses + 1) % num_of_links;
+					s = members[b->current_ses];
+					t = session[s].tunnel;
+					sp = &session[s];
+					LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s);
+					p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), fraglen, s, t, PPPIP, 0, bid, 0);
+					if (!p) return;
+					tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it...
+					update_session_out_stat(s, sp, fraglen);
+					remain -= fraglen;
+				}
+				// send the last fragment
 				b->current_ses = (b->current_ses + 1) % num_of_links;
-				s = b->members[b->current_ses];
+				s = members[b->current_ses];
 				t = session[s].tunnel;
 				sp = &session[s];
 				LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s);
-				p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), fraglen, s, t, PPPIP, 0, bid, 0);
+				p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), remain, s, t, PPPIP, 0, bid, MP_END);
 				if (!p) return;
-				tunnelsend(fragbuf, fraglen + (p-fragbuf), t); // send it...
-				update_session_out_stat(s, sp, fraglen);
-				remain -= fraglen;
+				tunnelsend(fragbuf, remain + (p-fragbuf), t); // send it...
+				update_session_out_stat(s, sp, remain);
+				if (remain != last_fraglen)
+					LOG(3, s, t, "PROCESSIPOUT ERROR REMAIN != LAST_FRAGLEN, %d != %d\n", remain, last_fraglen);
 			}
-			// send the last fragment
-			b->current_ses = (b->current_ses + 1) % num_of_links;
-			s = b->members[b->current_ses];
-			t = session[s].tunnel;
-			sp = &session[s];
-			LOG(4, s, t, "MPPP: (2)Session number becomes: %d\n", s);
-			p = makeppp(fragbuf, sizeof(fragbuf), buf+(len - remain), remain, s, t, PPPIP, 0, bid, MP_END);
-			if (!p) return;
-			tunnelsend(fragbuf, remain + (p-fragbuf), t); // send it...
-			update_session_out_stat(s, sp, remain);
-			if (remain != last_fraglen)
-				LOG(3, s, t, "PROCESSIPOUT ERROR REMAIN != LAST_FRAGLEN, %d != %d\n", remain, last_fraglen);
-		}
-		else {
-			// Send it as one frame
-			uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, bid, MP_BOTH_BITS);
+			else
+			{
+				// Send it as one frame
+				uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, bid, MP_BOTH_BITS);
+				if (!p) return;
+				tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
+				LOG(4, s, t, "MPPP: packet sent as one frame\n");
+				update_session_out_stat(s, sp, len);
+			}
+		}
+		else
+		{
+			// Send it as one frame (NO MPPP Frame)
+			uint8_t *p = makeppp(fragbuf, sizeof(fragbuf), buf, len, s, t, PPPIP, 0, 0, 0);
 			if (!p) return;
 			tunnelsend(fragbuf, len + (p-fragbuf), t); // send it...
-			LOG(4, s, t, "MPPP: packet sent as one frame\n");
 			update_session_out_stat(s, sp, len);
 		}
 	}
@@ -1972,36 +2025,67 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e
 		if (session[s].ppp.ipv6cp == Opened && session[s].ipv6prefixlen && del_routes)
 			route6set(s, session[s].ipv6route, session[s].ipv6prefixlen, 0);
 		
-		if (b) 
+		if (b)
 		{
-	                // This session was part of a bundle
-	                bundle[b].num_of_links--;
-	                LOG(3, s, session[s].tunnel, "MPPP: Dropping member link: %d from bundle %d\n",s,b);
-	                if(bundle[b].num_of_links == 0) 
+			// This session was part of a bundle
+			bundle[b].num_of_links--;
+			LOG(3, s, session[s].tunnel, "MPPP: Dropping member link: %d from bundle %d\n",s,b);
+			if(bundle[b].num_of_links == 0)
 			{
-	                        bundleclear(b);
-	                        LOG(3, s, session[s].tunnel, "MPPP: Kill bundle: %d (No remaing member links)\n",b);
-                	}
-                	else 
+				bundleclear(b);
+				LOG(3, s, session[s].tunnel, "MPPP: Kill bundle: %d (No remaing member links)\n",b);
+			}
+			else 
 			{
-	                        // Adjust the members array to accomodate the new change
-	                        uint8_t mem_num = 0;
-	                        // It should be here num_of_links instead of num_of_links-1 (previous instruction "num_of_links--")
-	                        if(bundle[b].members[bundle[b].num_of_links] != s) 
+				// Adjust the members array to accomodate the new change
+				uint8_t mem_num = 0;
+				// It should be here num_of_links instead of num_of_links-1 (previous instruction "num_of_links--")
+				if(bundle[b].members[bundle[b].num_of_links] != s)
 				{
-	                                uint8_t ml;
-	                                for(ml = 0; ml<bundle[b].num_of_links; ml++)
-	                                        if(bundle[b].members[ml] == s)
-	                                        {
-	                                                mem_num = ml;
-	                                                break;
-	                                        }
-	                                bundle[b].members[mem_num] = bundle[b].members[bundle[b].num_of_links];
-	                                LOG(3, s, session[s].tunnel, "MPPP: Adjusted member links array\n");
-                        	}
-                	}
-                	cluster_send_bundle(b);
-        	}
+					uint8_t ml;
+					for(ml = 0; ml<bundle[b].num_of_links; ml++)
+					if(bundle[b].members[ml] == s)
+					{
+							mem_num = ml;
+							break;
+					}
+					bundle[b].members[mem_num] = bundle[b].members[bundle[b].num_of_links];
+					LOG(3, s, session[s].tunnel, "MPPP: Adjusted member links array\n");
+
+					// If the killed session is the first of the bundle,
+					// the new first session must be stored in the cache_ipmap
+					// else the function sessionbyip return 0 and the sending not work any more (processipout).
+					if (mem_num == 0)
+					{
+						sessionidt new_s = bundle[b].members[0];
+
+						routed = 0;
+						// Add the route for this session.
+						for (r = 0; r < MAXROUTE && session[new_s].route[r].ip; r++)
+						{
+							int i, prefixlen;
+							in_addr_t ip;
+
+							prefixlen = session[new_s].route[r].prefixlen;
+							ip = session[new_s].route[r].ip;
+
+							if (!prefixlen) prefixlen = 32;
+							ip &= 0xffffffff << (32 - prefixlen);	// Force the ip to be the first one in the route.
+
+							for (i = ip; i < ip+(1<<(32-prefixlen)) ; ++i)
+								cache_ipmap(i, new_s);
+						}
+						cache_ipmap(session[new_s].ip, new_s);
+
+						// IPV6 route
+						if (session[new_s].ipv6prefixlen)
+							cache_ipv6map(session[new_s].ipv6route, session[new_s].ipv6prefixlen, new_s);
+					}
+				}
+			}
+
+			cluster_send_bundle(b);
+        }
 	}
 
 	if (session[s].throttle_in || session[s].throttle_out) // Unthrottle if throttled.
@@ -2540,7 +2624,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 				case 0:     // message type
 					message = ntohs(*(uint16_t *) b);
 					mandatory = flags & 0x80;
-					LOG(4, s, t, "   Message type = %u (%s)\n", *b, l2tp_code(message));
+					LOG(4, s, t, "   Message type = %u (%s)\n", message, l2tp_code(message));
 					break;
 				case 1:     // result code
 					{
@@ -3094,8 +3178,9 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 			}
 
 			session[s].last_packet = session[s].last_data = time_now;
-			if (session[s].walled_garden && !config->cluster_iam_master)
+			if (!config->cluster_iam_master)
 			{
+				// The fragments reconstruction is managed by the Master.
 				master_forward_packet(buf, len, addr->sin_addr.s_addr, addr->sin_port);
 				return;
 			}
@@ -3134,6 +3219,7 @@ void processudp(uint8_t *buf, int len, struct sockaddr_in *addr)
 }
 
 // read and process packet on tun
+// (i.e. this routine writes to buf[-8]).
 static void processtun(uint8_t * buf, int len)
 {
 	LOG_HEX(5, "Receive TUN Data", buf, len);
@@ -3407,8 +3493,8 @@ static void regular_cleanups(double period)
 			}
 		}
 
-		// Drop sessions who have not responded within IDLE_TIMEOUT seconds
-		if (session[s].last_packet && (time_now - session[s].last_packet >= IDLE_TIMEOUT))
+		// Drop sessions who have not responded within IDLE_ECHO_TIMEOUT seconds
+		if (session[s].last_packet && (time_now - session[s].last_packet >= config->idle_echo_timeout))
 		{
 			sessionshutdown(s, "No response to LCP ECHO requests.", CDN_ADMIN_DISC, TERM_LOST_SERVICE);
 			STAT(session_timeout);
@@ -3417,7 +3503,7 @@ static void regular_cleanups(double period)
 		}
 
 		// No data in ECHO_TIMEOUT seconds, send LCP ECHO
-		if (session[s].ppp.phase >= Establish && (time_now - session[s].last_packet >= ECHO_TIMEOUT) &&
+		if (session[s].ppp.phase >= Establish && (time_now - session[s].last_packet >= config->echo_timeout) &&
 			(time_now - sess_local[s].last_echo >= ECHO_TIMEOUT))
 		{
 			uint8_t b[MAXETHER];
@@ -3698,6 +3784,8 @@ static void mainloop(void)
 {
 	int i;
 	uint8_t buf[65536];
+	uint8_t *p = buf + 8; // for the hearder of the forwarded MPPP packet (see C_MPPP_FORWARD)
+	int size_bufp = sizeof(buf) - 8;
 	clockt next_cluster_ping = 0;	// send initial ping immediately
 	struct epoll_event events[BASE_FDS + RADIUS_FDS + EXTRA_FDS];
 	int maxevent = sizeof(events)/sizeof(*events);
@@ -3942,9 +4030,9 @@ static void mainloop(void)
 				// incoming IP
 				if (tun_ready)
 				{
-					if ((s = read(tunfd, buf, sizeof(buf))) > 0)
+					if ((s = read(tunfd, p, size_bufp)) > 0)
 					{
-						processtun(buf, s);
+						processtun(p, s);
 					    	tun_pkts++;
 					}
 					else
@@ -4193,6 +4281,9 @@ static void initdata(int optdebug, char *optconfig)
 	config->ppp_max_failure = 5;
 	config->kill_timedout_sessions = 1;
 	strcpy(config->random_device, RANDOMDEVICE);
+	// Set default value echo_timeout and idle_echo_timeout
+	config->echo_timeout = ECHO_TIMEOUT;
+	config->idle_echo_timeout = IDLE_ECHO_TIMEOUT;
 
 	log_stream = stderr;
 
@@ -4717,7 +4808,7 @@ int main(int argc, char *argv[])
 	/* set hostname /after/ having read the config file */
 	if (*config->hostname)
 		strcpy(hostname, config->hostname);
-	cli_init_hostname(hostname);
+	cli_init_complete(hostname);
 	update_config();
 	init_tbf(config->num_tbfs);