X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/517c3509bfa1987dc91fc5c15f86fcb8e5a6f7ed..14031c41a5c8e4e2513c6bfd65d5019da7611156:/grpsess.c?ds=inline

diff --git a/grpsess.c b/grpsess.c
index 68ec968..e710709 100644
--- a/grpsess.c
+++ b/grpsess.c
@@ -12,6 +12,7 @@
 
 #include "l2tpns.h"
 #include "util.h"
+#include "cluster.h"
 
 #ifdef BGP
 #include "bgp.h"
@@ -22,7 +23,7 @@ union grp_iphash {
 	union grp_iphash *idx;
 } grp_ip_hash[256];			// Mapping from IP address to group structures.
 
-static groupidt gnextgrpid = 0;
+groupidt gnextgrpid = 0;
 
 // Find gruop by IP, < 1 for not found
 //
@@ -84,7 +85,7 @@ groupidt grp_groupbyip(in_addr_t ip)
 //
 // This adds it to the routing table, advertises it
 // via BGP if enabled, and stuffs it into the
-// 'sessionbyip' cache.
+// 'groupbyip' cache.
 //
 // 'ip' must be in _host_ order.
 //
@@ -128,7 +129,7 @@ static void grp_routeset(groupidt g, in_addr_t ip, int prefixlen, int add)
 	n_ip = htonl(ip);
 	netlink_addattr(&req.nh, RTA_DST, &n_ip, sizeof(n_ip));
 
-	LOG(1, 0, 0, "Route (Group) %s %s/%d\n", add ? "add" : "del", fmtaddr(htonl(ip), 0), prefixlen);
+	LOG(3, 0, 0, "Route (Group) %s %s/%d\n", add ? "add" : "del", fmtaddr(htonl(ip), 0), prefixlen);
 
 	if (netlink_send(&req.nh) < 0)
 		LOG(0, 0, 0, "grp_routeset() error in sending netlink message: %s\n", strerror(errno));
@@ -153,7 +154,10 @@ static void grp_routeset(groupidt g, in_addr_t ip, int prefixlen, int add)
 			g = 0;	// Caching the session as '0' is the same as uncaching.
 
 		for (i = ip; i < ip+(1<<(32-prefixlen)) ; ++i)
+		{
 			grp_cache_ipmap(i, g);
+			if (!g) cache_ipmap(i, 0);
+		}
 	}
 }
 
@@ -212,7 +216,7 @@ void grp_removesession(groupidt g, sessionidt s)
 
 				if (gnextgrpid == g)
 				{
-					gnextgrpid = 0;
+					gnextgrpid = grpsession[g].prev;
 				}
 				else
 				{
@@ -228,6 +232,7 @@ void grp_removesession(groupidt g, sessionidt s)
 				}
 
 				memset(&grpsession[g], 0, sizeof(grpsession[0]));
+				grpsession[g].state = GROUPEFREE;
 			}
 			else
 			{
@@ -236,6 +241,8 @@ void grp_removesession(groupidt g, sessionidt s)
 						&grpsession[g].sesslist[i+1],
 						(grpsession[g].nbsession - i) * sizeof(grpsession[g].sesslist[i]));
 			}
+
+			cluster_send_groupe(g);
 			return;
 		}
 	}
@@ -270,6 +277,7 @@ static int grp_addsession(groupidt g, sessionidt s, uint8_t weight)
 			// it's the first session of the group, set to next group
 			grpsession[g].prev = gnextgrpid;
 			gnextgrpid = g;
+			grpsession[g].state = GROUPEOPEN;
 		}
 		grpsession[g].sesslist[i].sid = s;
 		grpsession[g].sesslist[i].weight = weight;
@@ -356,6 +364,9 @@ void grp_processvendorspecific(sessionidt s, uint8_t *pvs)
 			return;
 		}
 
+		if (grpid > config->cluster_highest_groupeid)
+			config->cluster_highest_groupeid = grpid;
+
 		n++;
 	}
 
@@ -420,6 +431,8 @@ void grp_processvendorspecific(sessionidt s, uint8_t *pvs)
 // Init data structures
 void grp_initdata()
 {
+	int i;
+
 	// Set default value (10s)
 	config->grp_txrate_average_time = 10;
 
@@ -430,6 +443,10 @@ void grp_initdata()
 	}
 
 	memset(grpsession, 0, sizeof(grpsession[0]) * MAXGROUPE);
+	for (i = 1; i < MAXGROUPE; i++)
+	{
+		grpsession[i].state = GROUPEUNDEF;
+	}
 }
 
 // Update time_changed of the group
@@ -443,69 +460,148 @@ void grp_time_changed()
 	}
 }
 
+// Uncache all IP of a session
+static void grp_uncache_ipsession(groupidt g, sessionidt s)
+{
+	int i;
+	uint8_t *a;
+	in_addr_t ip;
+	in_addr_t n_ip, j;
+	int prefixlen;
+	union iphash *h;
+
+	for (i = 0; i < grpsession[g].nbroutesgrp; i++)
+	{
+		if (grpsession[g].route[i].ip != 0)
+		{
+			prefixlen = grpsession[g].route[i].prefixlen;
+			ip = grpsession[g].route[i].ip & (0xffffffff << (32 - prefixlen));	// Force the ip to be the first one in the route.
+
+			for (j = ip; j < ip+(1<<(32-prefixlen)) ; ++j)
+			{
+				n_ip = htonl(j); // To network order
+				a = (uint8_t *) &n_ip;
+				h = ip_hash;
+
+				if (!(h = h[*a++].idx)) continue;
+				if (!(h = h[*a++].idx)) continue;
+				if (!(h = h[*a++].idx)) continue;
+
+				if (s == h[*a].sess)
+				{
+					h[*a].sess = 0;
+					//LOG(3, s, session[s].tunnel, "UnCaching ip address %s\n", fmtaddr(n_ip, 0));
+				}
+			}
+		}
+	}
+}
+
 // return the next session can be used on the group
 sessionidt grp_getnextsession(groupidt g, in_addr_t ip)
 {
 	sessionidt s = 0, s2 = 0, s3 = 0;
 	int i;
-	uint32_t ltime_changed = 0;
-	uint32_t mintxrate = 0xFFFFFFFF;
+	uint32_t ltime_changed = 0, mintxrate = 0xFFFFFFFF, maxtxrate = 0;
+	uint32_t txrate;
 
 	if (g >= MAXGROUPE)
 		return 0;
 
-	if ((s = sessionbyip(ip)))
+	if (grpsession[g].time_changed >= config->grp_txrate_average_time)
 	{
-		if ( (session[s].ppp.phase > Establish) &&
-			 (time_now - session[s].last_packet <= (config->echo_timeout + 2)) )
+		// recalculation txrate
+		ltime_changed = grpsession[g].time_changed;
+		grpsession[g].time_changed = 0;
+		for (i = 0; i < grpsession[g].nbsession; i++)
 		{
-			int recaltxrate = 0;
-
-			for (i = 0; i < grpsession[g].nbsession; i++)
+			if ((s2 = grpsession[g].sesslist[i].sid))
 			{
-				if (s == grpsession[g].sesslist[i].sid)
+				uint32_t coutgrp_delta = 0;
+
+				if (session[s2].cout >= grpsession[g].sesslist[i].prev_coutgrp)
+					coutgrp_delta = session[s2].cout - grpsession[g].sesslist[i].prev_coutgrp;
+				grpsession[g].sesslist[i].prev_coutgrp = session[s2].cout;
+
+				grpsession[g].sesslist[i].tx_rate = coutgrp_delta/ltime_changed;
+
+				txrate = grpsession[g].sesslist[i].tx_rate/grpsession[g].sesslist[i].weight;
+				if (txrate < mintxrate)
 				{
-					if ((time_now - grpsession[g].sesslist[i].mark_time) > config->grp_txrate_average_time)
+					if ( session[s2].ppp.phase > Establish &&
+						(time_now - session[s2].last_packet <= (config->echo_timeout + 1)) )
 					{
-						grpsession[g].sesslist[i].mark_time = time_now;
-						recaltxrate = 1;
-						break;
+						grpsession[g].smin = s2;
+						mintxrate = txrate;
 					}
 				}
-			}
 
-			if (!recaltxrate)
-				return s;
+				if (txrate > maxtxrate)
+				{
+					if ( session[s2].ppp.phase > Establish &&
+					(time_now - session[s2].last_packet <= (config->echo_timeout + 1)) )
+					{
+						grpsession[g].smax = s2;
+						maxtxrate = txrate;
+					}
+				}
+			}
 		}
 	}
 
-	//if (grpsession[g].time_changed > config->grp_txrate_average_time)
-	if (grpsession[g].time_changed > 1)
+	if ((s = sessionbyip(ip)))
 	{
-		ltime_changed = grpsession[g].time_changed;
-		grpsession[g].time_changed = 1;
+		if (g != grp_groupbysession(s))
+		{
+			// This session does not belong to this group
+			LOG(2, s, session[s].tunnel, "Warning, the session does not belong to group %d\n", g);
+			s = 0;
+		}
+		else if (s == grpsession[g].smax)
+		{
+			s = grpsession[g].smin;
+			grpsession[g].smax = 0;
+		}
+		else if ( (session[s].ppp.phase > Establish) &&
+			 (time_now - session[s].last_packet <= (config->echo_timeout + 1)) )
+		{
+			return s;
+		}
+		else
+		{
+			s = 0;
+		}
 	}
 
-	for (i = 0; i < grpsession[g].nbsession; i++)
+	if (!s)
 	{
-		if ((s2 = grpsession[g].sesslist[i].sid))
-		{
-			s3 = s2;
-			if (ltime_changed)
-			{
-				grpsession[g].sesslist[i].tx_rate = session[s2].coutgrp_delta/ltime_changed;
-				session[s2].coutgrp_delta = grpsession[g].sesslist[i].tx_rate;
-				//LOG(3, s2, session[s2].tunnel, "TX Rate: %d session weight: %d\n", grpsession[g].sesslist[i].tx_rate, grpsession[g].sesslist[i].weight);
-			}
+		// random between 0 and nbsession-1
+		uint indexsess = (rand() % grpsession[g].nbsession);
+
+		if (indexsess >= grpsession[g].nbsession)
+			indexsess = 0; //Sanity checks.
 
-			if ( session[s2].ppp.phase > Establish &&
-				(time_now - session[s2].last_packet <= (config->echo_timeout + 2)) )
+		s2 = grpsession[g].sesslist[indexsess].sid;
+		if (s2 &&
+			(session[s2].ppp.phase > Establish) &&
+			(time_now - session[s2].last_packet <= (config->echo_timeout + 1)))
+		{
+			s = s2;
+		}
+		else
+		{
+			for (i = 0; i < grpsession[g].nbsession; i++)
 			{
-				uint32_t txrate = grpsession[g].sesslist[i].tx_rate/grpsession[g].sesslist[i].weight;
-				if (txrate < mintxrate)
+				if ((s2 = grpsession[g].sesslist[i].sid))
 				{
-					s = s2;
-					mintxrate = txrate;
+					s3 = s2;
+
+					if ( session[s2].ppp.phase > Establish &&
+						(time_now - session[s2].last_packet <= (config->echo_timeout + 1)) )
+					{
+						s = s2;
+						break;
+					}
 				}
 			}
 		}
@@ -519,3 +615,66 @@ sessionidt grp_getnextsession(groupidt g, in_addr_t ip)
 
 	return s;
 }
+
+// load a groupe receive from master
+int grp_cluster_load_groupe(groupidt g, groupsesst *new)
+{
+	int i;
+	int updategroup = 0;
+
+	if (g >= MAXGROUPE)
+	{
+		LOG(0, 0, 0, "ERROR: Received a group id > MAXGROUPE!\n");
+		return 0;
+	}
+
+	if ((grpsession[g].nbroutesgrp != new->nbroutesgrp) ||
+		(grpsession[g].nbsession != new->nbsession))
+	{
+		updategroup = 1;
+	}
+
+	if (!updategroup)
+	{
+		// Check session list
+		for (i = 0; i < grpsession[g].nbsession; i++)
+		{
+			if (grpsession[g].sesslist[i].sid != new->sesslist[i].sid)
+			{
+				updategroup = 1;
+				break;
+			}
+		}
+	}
+
+	if (!updategroup)
+	{
+		// Check routes list
+		for (i = 0; i < grpsession[g].nbroutesgrp; i++)
+		{
+			if (grpsession[g].route[i].ip != new->route[i].ip)
+			{
+				updategroup = 1;
+				break;
+			}
+		}
+	}
+
+	// needs update
+	if (updategroup)
+	{
+		// Del all routes
+		grp_setgrouproute(g, 0);
+	}
+
+	memcpy(&grpsession[g], new, sizeof(grpsession[g]));	// Copy over..
+
+	// needs update
+	if (updategroup)
+	{
+		// Add all routes
+		grp_setgrouproute(g, 1);
+	}
+
+	return 1;
+}