X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/caa9662496578822d24926b927365639c936c761..eecccf0b30d5ec19960633d1b62cf5f9936d1f16:/l2tpns.c

diff --git a/l2tpns.c b/l2tpns.c
index 850cd76..34e4a7a 100644
--- a/l2tpns.c
+++ b/l2tpns.c
@@ -81,7 +81,7 @@ int cluster_sockfd = -1;	// Intra-cluster communications socket.
 int epollfd = -1;		// event polling
 time_t basetime = 0;		// base clock
 char hostname[MAXHOSTNAME] = "";	// us.
-static int tunidx;		// ifr_ifindex of tun device
+int tunidx;				// ifr_ifindex of tun device
 int nlseqnum = 0;		// netlink sequence number
 int min_initok_nlseqnum = 0;	// minimun seq number for messages after init is ok
 static int syslog_log = 0;	// are we logging to syslog
@@ -98,10 +98,7 @@ uint16_t MSS = 0;		// TCP MSS
 struct cli_session_actions *cli_session_actions = NULL;	// Pending session changes requested by CLI
 struct cli_tunnel_actions *cli_tunnel_actions = NULL;	// Pending tunnel changes required by CLI
 
-union iphash {
-	sessionidt sess;
-	union iphash *idx;
-} ip_hash[256];			// Mapping from IP address to session structures.
+union iphash ip_hash[256];	// Mapping from IP address to session structures.
 
 struct ipv6radix {
 	sessionidt sess;
@@ -190,7 +187,10 @@ config_descriptt config_values[] = {
 	CONFIG("pppoe_if_to_bind", pppoe_if_to_bind, STRING),
 	CONFIG("pppoe_service_name", pppoe_service_name, STRING),
 	CONFIG("pppoe_ac_name", pppoe_ac_name, STRING),
-	{ NULL, 0, 0, 0 },
+	CONFIG("disable_sending_hello", disable_sending_hello, BOOL),
+	CONFIG("disable_no_spoof", disable_no_spoof, BOOL),
+	CONFIG("grp_txrate_average_time", grp_txrate_average_time, INT),
+	{ NULL, 0, 0, 0 }
 };
 
 static char *plugin_functions[] = {
@@ -218,6 +218,7 @@ tunnelt *tunnel = NULL;			// Array of tunnel structures.
 bundlet *bundle = NULL;			// Array of bundle structures.
 fragmentationt *frag = NULL;		// Array of fragmentation structures.
 sessiont *session = NULL;		// Array of session structures.
+groupsesst *grpsession = NULL;		// Array of groupsesst structures.
 sessionlocalt *sess_local = NULL;	// Array of local per-session counters.
 radiust *radius = NULL;			// Array of radius structures.
 ippoolt *ip_address_pool = NULL;	// Array of dynamic IP addresses.
@@ -228,9 +229,6 @@ struct Tstats *_statistics = NULL;
 struct Tringbuffer *ringbuffer = NULL;
 #endif
 
-static ssize_t netlink_send(struct nlmsghdr *nh);
-static void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen);
-static void cache_ipmap(in_addr_t ip, sessionidt s);
 static void uncache_ipmap(in_addr_t ip);
 static void cache_ipv6map(struct in6_addr ip, int prefixlen, sessionidt s);
 static void free_ip_address(sessionidt s);
@@ -259,8 +257,9 @@ static clockt now(double *f)
 	if (f) *f = t.tv_sec + t.tv_usec / 1000000.0;
 	if (t.tv_sec != time_now)
 	{
-	    time_now = t.tv_sec;
-	    time_changed++;
+		time_now = t.tv_sec;
+		time_changed++;
+		grp_time_changed();
 	}
 
 	// Time in milliseconds
@@ -619,7 +618,7 @@ static void initnetlink(void)
 	}
 }
 
-static ssize_t netlink_send(struct nlmsghdr *nh)
+ssize_t netlink_send(struct nlmsghdr *nh)
 {
 	struct sockaddr_nl nladdr;
 	struct iovec iov;
@@ -655,7 +654,7 @@ static ssize_t netlink_recv(void *buf, ssize_t len)
 }
 
 /* adapted from iproute2 */
-static void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen)
+void netlink_addattr(struct nlmsghdr *nh, int type, const void *data, int alen)
 {
 	int len = RTA_LENGTH(alen);
 	struct rtattr *rta;
@@ -1001,7 +1000,7 @@ sessionidt sessionbyipv6(struct in6_addr ip)
 //
 // (It's actually cached in network order)
 //
-static void cache_ipmap(in_addr_t ip, sessionidt s)
+void cache_ipmap(in_addr_t ip, sessionidt s)
 {
 	in_addr_t nip = htonl(ip);	// MUST be in network order. I.e. MSB must in be ((char *) (&ip))[0]
 	uint8_t *a = (uint8_t *) &nip;
@@ -1373,6 +1372,7 @@ static void update_session_out_stat(sessionidt s, sessiont *sp, int len)
 {
 	increment_counter(&sp->cout, &sp->cout_wrap, len); // byte count
 	sp->cout_delta += len;
+	sp->coutgrp_delta += len;
 	sp->pout++;
 	sp->last_data = time_now;
 
@@ -1386,6 +1386,7 @@ static void update_session_out_stat(sessionidt s, sessiont *sp, int len)
 void processipout(uint8_t *buf, int len)
 {
 	sessionidt s;
+	groupidt g;
 	sessiont *sp;
 	tunnelidt t;
 	in_addr_t ip;
@@ -1422,7 +1423,31 @@ void processipout(uint8_t *buf, int len)
 	}
 
 	ip = *(uint32_t *)(buf + 16);
-	if (!(s = sessionbyip(ip)))
+	if ((g = grp_groupbyip(ip)))
+	{
+		s = grp_getnextsession(g, ip);
+		if (!s)
+		{
+			// Is this a packet for a session that doesn't exist?
+			static int rate = 0;	// Number of ICMP packets we've sent this second.
+			static int last = 0;	// Last time we reset the ICMP packet counter 'rate'.
+
+			if (last != time_now)
+			{
+				last = time_now;
+				rate = 0;
+			}
+
+			if (rate++ < config->icmp_rate) // Only send a max of icmp_rate per second.
+			{
+				LOG(4, 0, 0, "IP: Sending ICMP host unreachable to %s\n", fmtaddr(*(in_addr_t *)(buf + 12), 0));
+				host_unreachable(*(in_addr_t *)(buf + 12), *(uint16_t *)(buf + 4),
+					config->bind_address ? config->bind_address : my_address, buf, len);
+			}
+			return;
+		}
+	}
+	else if (!(s = sessionbyip(ip)))
 	{
 		// Is this a packet for a session that doesn't exist?
 		static int rate = 0;	// Number of ICMP packets we've sent this second.
@@ -1624,17 +1649,15 @@ void processipout(uint8_t *buf, int 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...
+			uint8_t *p = opt_makeppp(buf, len, s, t, PPPIP, 0, 0, 0);
+			tunnelsend(p, len + (buf-p), t); // send it...
 			update_session_out_stat(s, sp, len);
 		}
 	}
 	else
 	{
-		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...
+		uint8_t *p = opt_makeppp(buf, len, s, t, PPPIP, 0, 0, 0);
+		tunnelsend(p, len + (buf-p), t); // send it...
 		update_session_out_stat(s, sp, len);
 	}
 
@@ -1759,6 +1782,7 @@ static void processipv6out(uint8_t * buf, int len)
 
 	increment_counter(&sp->cout, &sp->cout_wrap, len); // byte count
 	sp->cout_delta += len;
+	sp->coutgrp_delta += len;
 	sp->pout++;
 	udp_tx += len;
 
@@ -1808,6 +1832,7 @@ static void send_ipout(sessionidt s, uint8_t *buf, int len)
 
 	increment_counter(&sp->cout, &sp->cout_wrap, len); // byte count
 	sp->cout_delta += len;
+	sp->coutgrp_delta += len;
 	sp->pout++;
 	udp_tx += len;
 
@@ -2026,7 +2051,6 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e
 		struct param_kill_session data = { &tunnel[session[s].tunnel], &session[s] };
 		LOG(2, s, session[s].tunnel, "Shutting down session %u: %s\n", s, reason);
 		run_plugins(PLUGIN_KILL_SESSION, &data);
-		session[s].die = TIME + 150; // Clean up in 15 seconds
 	}
 
 	if (session[s].ip && !walled_garden && !session[s].die)
@@ -2051,8 +2075,11 @@ void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_e
 			memcpy(&shut_acct[shut_acct_n++], &session[s], sizeof(session[s]));
 	}
 
+	if (!session[s].die)
+		session[s].die = TIME + 150; // Clean up in 15 seconds
+
 	if (session[s].ip)
-	{                          // IP allocated, clear and unroute
+	{	// IP allocated, clear and unroute
 		int r;
 		int routed = 0;
 		for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
@@ -2252,6 +2279,8 @@ static void sessionclear(sessionidt s)
 // kill a session now
 void sessionkill(sessionidt s, char *reason)
 {
+	groupidt g;
+
 	CSTAT(sessionkill);
 
 	if (!session[s].opened) // not alive
@@ -2282,6 +2311,12 @@ void sessionkill(sessionidt s, char *reason)
 #endif
 
 	LOG(2, s, session[s].tunnel, "Kill session %d (%s): %s\n", s, session[s].user, reason);
+
+	if ((g = grp_groupbysession(s)))
+	{
+		grp_removesession(g, s);
+	}
+
 	sessionclear(s);
 	cluster_send_session(s);
 }
@@ -3500,10 +3535,13 @@ static void regular_cleanups(double period)
 		// Send hello
 		if (tunnel[t].state == TUNNELOPEN && !tunnel[t].controlc && (time_now - tunnel[t].lastrec) > 60)
 		{
-			controlt *c = controlnew(6); // sending HELLO
-			controladd(c, 0, t); // send the message
-			LOG(3, 0, t, "Sending HELLO message\n");
-			t_actions++;
+			if (!config->disable_sending_hello)
+			{
+				controlt *c = controlnew(6); // sending HELLO
+				controladd(c, 0, t); // send the message
+				LOG(3, 0, t, "Sending HELLO message\n");
+				t_actions++;
+			}
 		}
 
 		// Check for tunnel changes requested from the CLI
@@ -3677,7 +3715,7 @@ 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 >= config->echo_timeout) &&
-			(time_now - sess_local[s].last_echo >= ECHO_TIMEOUT))
+			(time_now - sess_local[s].last_echo >= config->echo_timeout))
 		{
 			uint8_t b[MAXETHER];
 
@@ -3963,9 +4001,9 @@ static void mainloop(void)
 {
 	int i;
 	uint8_t buf[65536];
-	uint8_t *p = buf + 24; // for the hearder of the forwarded MPPP packet (see C_MPPP_FORWARD)
+	uint8_t *p = buf + 32; // for the hearder of the forwarded MPPP packet (see C_MPPP_FORWARD)
 						// and the forwarded pppoe session
-	int size_bufp = sizeof(buf) - 24;
+	int size_bufp = sizeof(buf) - 32;
 	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);
@@ -4154,26 +4192,26 @@ static void mainloop(void)
 
 				case FD_TYPE_CONTROL: // nsctl commands
 					alen = sizeof(addr);
-					s = recvfromto(controlfd, buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local);
-					if (s > 0) processcontrol(buf, s, &addr, alen, &local);
+					s = recvfromto(controlfd, p, size_bufp, MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local);
+					if (s > 0) processcontrol(p, s, &addr, alen, &local);
 					n--;
 					break;
 
 				case FD_TYPE_DAE: // DAE requests
 					alen = sizeof(addr);
-					s = recvfromto(daefd, buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local);
-					if (s > 0) processdae(buf, s, &addr, alen, &local);
+					s = recvfromto(daefd, p, size_bufp, MSG_WAITALL, (struct sockaddr *) &addr, &alen, &local);
+					if (s > 0) processdae(p, s, &addr, alen, &local);
 					n--;
 					break;
 
 				case FD_TYPE_RADIUS: // RADIUS response
 					alen = sizeof(addr);
-					s = recvfrom(radfds[d->index], buf, sizeof(buf), MSG_WAITALL, (struct sockaddr *) &addr, &alen);
+					s = recvfrom(radfds[d->index], p, size_bufp, MSG_WAITALL, (struct sockaddr *) &addr, &alen);
 					if (s >= 0 && config->cluster_iam_master)
 					{
 						if (addr.sin_addr.s_addr == config->radiusserver[0] ||
 						    addr.sin_addr.s_addr == config->radiusserver[1])
-							processrad(buf, s, d->index);
+							processrad(p, s, d->index);
 						else
 							LOG(3, 0, 0, "Dropping RADIUS packet from unknown source %s\n",
 								fmtaddr(addr.sin_addr.s_addr, 0));
@@ -4191,8 +4229,8 @@ static void mainloop(void)
 
 				case FD_TYPE_NETLINK:
 				{
-					struct nlmsghdr *nh = (struct nlmsghdr *)buf;
-					s = netlink_recv(buf, sizeof(buf));
+					struct nlmsghdr *nh = (struct nlmsghdr *)p;
+					s = netlink_recv(p, size_bufp);
 					if (nh->nlmsg_type == NLMSG_ERROR)
 					{
 						struct nlmsgerr *errmsg = NLMSG_DATA(nh);
@@ -4313,11 +4351,11 @@ static void mainloop(void)
 			if (c >= config->multi_read_count)
 			{
 #ifdef LAC
-				LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun %d cluster and %d rmlns packets\n",
-					config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts, udplac_pkts);
+				LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun %d cluster %d rmlns and %d pppoe packets\n",
+					config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts, udplac_pkts, pppoesess_pkts);
 #else
-				LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun and %d cluster packets\n",
-					config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts);
+				LOG(3, 0, 0, "Reached multi_read_count (%d); processed %d udp, %d tun %d cluster and %d pppoe packets\n",
+					config->multi_read_count, udp_pkts, tun_pkts, cluster_pkts, pppoesess_pkts);
 #endif
 				STAT(multi_read_exceeded);
 				more++;
@@ -4656,6 +4694,8 @@ static void initdata(int optdebug, char *optconfig)
 #ifdef LAC
 	lac_initremotelnsdata();
 #endif
+
+	grp_initdata();
 }
 
 static int assign_ip_address(sessionidt s)
@@ -5577,6 +5617,7 @@ int sessionsetup(sessionidt s, tunnelidt t)
 	if (!session[s].bundle || (bundle[session[s].bundle].num_of_links == 1))
 	{
 		int routed = 0;
+		groupidt g;
 
 		// Add the route for this session.
 		for (r = 0; r < MAXROUTE && session[s].route[r].ip; r++)
@@ -5599,6 +5640,11 @@ int sessionsetup(sessionidt s, tunnelidt t)
 		}
 		else
 			cache_ipmap(session[s].ip, s);
+
+		if ((g = grp_groupbysession(s)))
+		{
+			grp_setgrouproute(g, 1);
+		}
 	}
 
 	sess_local[s].lcp_authtype = 0; // RADIUS authentication complete