rtnetlink integrated. no more callouts to iproute2

make-linux.mk

@@ -19,7 +19,7 @@ include objects.mk
 ONE_OBJS+=osdep/LinuxEthernetTap.o
 ONE_OBJS+=osdep/LinuxNetLink.o
 
-NLTEST_OBJS+=osdep/LinuxNetLink.o
+NLTEST_OBJS+=osdep/LinuxNetLink.o node/InetAddress.o node/Utils.o node/Salsa20.o
 NLTEST_OBJS+=nltest.o
 
 # Auto-detect miniupnpc and nat-pmp as well and use system libs if present,

osdep/LinuxEthernetTap.cpp

@@ -56,6 +56,7 @@
 #include "../node/Dictionary.hpp"
 #include "OSUtils.hpp"
 #include "LinuxEthernetTap.hpp"
+#include "LinuxNetLink.hpp"
 
 // ff:ff:ff:ff:ff:ff with no ADI
 static const ZeroTier::MulticastGroup _blindWildcardMulticastGroup(ZeroTier::MAC(0xff),0);
@@ -97,6 +98,9 @@ LinuxEthernetTap::LinuxEthernetTap(
 	char procpath[128],nwids[32];
 	struct stat sbuf;
 
+	// ensure netlink connection is started
+	(void)LinuxNetLink::getInstance();
+	
 	OSUtils::ztsnprintf(nwids,sizeof(nwids),"%.16llx",nwid);
 
 	Mutex::Lock _l(__tapCreateLock); // create only one tap at a time, globally
@@ -263,18 +267,8 @@ bool LinuxEthernetTap::enabled() const
 
 static bool ___removeIp(const std::string &_dev,const InetAddress &ip)
 {
-	long cpid = (long)vfork();
-	if (cpid == 0) {
-		OSUtils::redirectUnixOutputs("/dev/null",(const char *)0);
-		setenv("PATH", "/sbin:/bin:/usr/sbin:/usr/bin", 1);
-		char iptmp[128];
-		::execlp("ip","ip","addr","del",ip.toString(iptmp),"dev",_dev.c_str(),(const char *)0);
-		::_exit(-1);
-	} else {
-		int exitcode = -1;
-		::waitpid(cpid,&exitcode,0);
-		return (exitcode == 0);
-	}
+	LinuxNetLink::getInstance().removeAddress(ip, _dev.c_str());
+	return true;
 }
 
 #ifdef __SYNOLOGY__
@@ -285,49 +279,32 @@ bool LinuxEthernetTap::addIpSyn(std::vector<InetAddress> ips)
 	std::string cfg_contents = "DEVICE="+_dev+"\nBOOTPROTO=static";
 	int ip4=0,ip6=0,ip4_tot=0,ip6_tot=0;
 
-	long cpid = (long)vfork();
-	if (cpid == 0) {
-		OSUtils::redirectUnixOutputs("/dev/null",(const char *)0);
-		setenv("PATH", "/sbin:/bin:/usr/sbin:/usr/bin", 1);
-		// We must know if there is at least (one) of each protocol version so we
-		// can properly enumerate address/netmask combinations in the ifcfg-dev file
-		for(int i=0; i<(int)ips.size(); i++) {
-			if (ips[i].isV4())
-				ip4_tot++;
-			else
-				ip6_tot++;
-		}
-		// Assemble and write contents of ifcfg-dev file
-		for(int i=0; i<(int)ips.size(); i++) {
-			if (ips[i].isV4()) {
-				char iptmp[64],iptmp2[64];
-				std::string numstr4 = ip4_tot > 1 ? std::to_string(ip4) : "";
-				cfg_contents += "\nIPADDR"+numstr4+"="+ips[i].toIpString(iptmp)
-					+ "\nNETMASK"+numstr4+"="+ips[i].netmask().toIpString(iptmp2)+"\n";
-				ip4++;
-			}
-			else {
-				char iptmp[64],iptmp2[64];
-				std::string numstr6 = ip6_tot > 1 ? std::to_string(ip6) : "";
-				cfg_contents += "\nIPV6ADDR"+numstr6+"="+ips[i].toIpString(iptmp)
-					+ "\nNETMASK"+numstr6+"="+ips[i].netmask().toIpString(iptmp2)+"\n";
-				ip6++;
-			}
-		}
-		OSUtils::writeFile(filepath.c_str(), cfg_contents.c_str(), cfg_contents.length());
-		// Finaly, add IPs
-		for(int i=0; i<(int)ips.size(); i++){
-			char iptmp[128],iptmp2[128];
-			if (ips[i].isV4())
-				::execlp("ip","ip","addr","add",ips[i].toString(iptmp),"broadcast",ips[i].broadcast().toIpString(iptmp2),"dev",_dev.c_str(),(const char *)0);
-			else
-				::execlp("ip","ip","addr","add",ips[i].toString(iptmp),"dev",_dev.c_str(),(const char *)0);
+	for(int i=0; i<(int)ips.size(); i++) {
+		if (ips[i].isV4())
+			ip4_tot++;
+		else
+			ip6_tot++;
+	}
+	// Assemble and write contents of ifcfg-dev file
+	for(int i=0; i<(int)ips.size(); i++) {
+		if (ips[i].isV4()) {
+			char iptmp[64],iptmp2[64];
+			std::string numstr4 = ip4_tot > 1 ? std::to_string(ip4) : "";
+			cfg_contents += "\nIPADDR"+numstr4+"="+ips[i].toIpString(iptmp)
+				+ "\nNETMASK"+numstr4+"="+ips[i].netmask().toIpString(iptmp2)+"\n";
+			ip4++;
+		} else {
+			char iptmp[64],iptmp2[64];
+			std::string numstr6 = ip6_tot > 1 ? std::to_string(ip6) : "";
+			cfg_contents += "\nIPV6ADDR"+numstr6+"="+ips[i].toIpString(iptmp)
+				+ "\nNETMASK"+numstr6+"="+ips[i].netmask().toIpString(iptmp2)+"\n";
+			ip6++;
 		}
-		::_exit(-1);
-	} else if (cpid > 0) {
-		int exitcode = -1;
-		::waitpid(cpid,&exitcode,0);
-		return (exitcode == 0);
+	}
+	OSUtils::writeFile(filepath.c_str(), cfg_contents.c_str(), cfg_contents.length());
+	// Finaly, add IPs
+	for(int i=0; i<(int)ips.size(); i++){
+		LinuxNetLink::getInstance().addAddress(ips[i], _dev.c_str());
 	}
 	return true;
 }
@@ -348,24 +325,9 @@ bool LinuxEthernetTap::addIp(const InetAddress &ip)
 			___removeIp(_dev,*i);
 	}
 
-	long cpid = (long)vfork();
-	if (cpid == 0) {
-		OSUtils::redirectUnixOutputs("/dev/null",(const char *)0);
-		setenv("PATH", "/sbin:/bin:/usr/sbin:/usr/bin", 1);
-		char iptmp[128],iptmp2[128];
-		if (ip.isV4()) {
-			::execlp("ip","ip","addr","add",ip.toString(iptmp),"broadcast",ip.broadcast().toIpString(iptmp2),"dev",_dev.c_str(),(const char *)0);
-		} else {
-			::execlp("ip","ip","addr","add",ip.toString(iptmp),"dev",_dev.c_str(),(const char *)0);
-		}
-		::_exit(-1);
-	} else if (cpid > 0) {
-		int exitcode = -1;
-		::waitpid(cpid,&exitcode,0);
-		return (exitcode == 0);
-	}
+	LinuxNetLink::getInstance().addAddress(ip, _dev.c_str());
 
-	return false;
+	return true;
 }
 
 bool LinuxEthernetTap::removeIp(const InetAddress &ip)

osdep/LinuxNetLink.cpp

@@ -54,39 +54,36 @@ LinuxNetLink::LinuxNetLink()
 	: _t()
 	, _running(false)
 	, _routes_ipv4()
+	, _rv4_m()
 	, _routes_ipv6()
+	, _rv6_m()
 	, _seq(0)
+	, _interfaces()
+	, _if_m()
 	, _fd(socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE))
 	, _la({0})
 {
 
 	// set socket timeout to 1 sec so we're not permablocking recv() calls
-	struct timeval tv;
-	tv.tv_sec = 1;
-	tv.tv_usec = 0;
-	if(setsockopt(_fd, SOL_SOCKET, SO_RCVTIMEO, (const char*)&tv, sizeof(tv)) != 0) {
-		fprintf(stderr, "setsockopt failed: %s\n", strerror(errno));
-	}
+	_setSocketTimeout(_fd, 1);
 
 	_la.nl_family = AF_NETLINK;
-	_la.nl_pid = getpid();
+	_la.nl_pid = getpid()+1;
 	_la.nl_groups = RTMGRP_LINK|RTMGRP_IPV4_IFADDR|RTMGRP_IPV6_IFADDR|RTMGRP_IPV4_ROUTE|RTMGRP_IPV6_ROUTE|RTMGRP_NOTIFY;
 	if (bind(_fd, (struct sockaddr*)&_la, sizeof(_la))) {
 		fprintf(stderr, "Error connecting to RTNETLINK: %s\n", strerror(errno));
 		::exit(1);
 	}
 
-	_running = true;
-	_t = Thread::start(this);
-
 	fprintf(stderr, "Requesting IPV4 Routes\n");
 	_requestIPv4Routes();
-	Thread::sleep(10);
 	fprintf(stderr, "Requesting IPV6 Routes\n");
 	_requestIPv6Routes();
-	Thread::sleep(10);
 	fprintf(stderr, "Requesting Interface List\n");
 	_requestInterfaceList();
+
+	_running = true;
+	_t = Thread::start(this);
 }
 
 LinuxNetLink::~LinuxNetLink()
@@ -97,7 +94,17 @@ LinuxNetLink::~LinuxNetLink()
 	::close(_fd);
 }
 
-void LinuxNetLink::threadMain() throw()
+void LinuxNetLink::_setSocketTimeout(int fd, int seconds) 
+{
+	struct timeval tv;
+	tv.tv_sec = seconds;
+	tv.tv_usec = 0;
+	if(setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, (const char*)&tv, sizeof(tv)) != 0) {
+		fprintf(stderr, "setsockopt failed: %s\n", strerror(errno));
+	}
+}
+
+int LinuxNetLink::_doRecv(int fd)
 {
 	char buf[8192];
 	char *p = NULL;
@@ -106,26 +113,24 @@ void LinuxNetLink::threadMain() throw()
 	int rtn = 0;
 	p = buf;
 
-	while(_running) {
-		rtn = recv(_fd, p, sizeof(buf) - nll, 0);
+	while(true) {
+		rtn = recv(fd, p, sizeof(buf) - nll, 0);
 
 		if (rtn > 0) {
 			nlp = (struct nlmsghdr *)p;
 
 			if(nlp->nlmsg_type == NLMSG_ERROR && (nlp->nlmsg_flags & NLM_F_ACK) != NLM_F_ACK) {
-				fprintf(stderr, "NLMSG_ERROR\n");
 				struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(nlp);
 				if (err->error != 0) {
 					fprintf(stderr, "rtnetlink error: %s\n", strerror(-(err->error)));
 				}
 				p = buf;
 				nll = 0;
-				continue;
+				break;
 			}
 
 			if (nlp->nlmsg_type == NLMSG_NOOP) {
-				fprintf(stderr, "noop\n");
-				continue;
+				break;
 			}
 
 			if( (nlp->nlmsg_flags & NLM_F_MULTI) == NLM_F_MULTI || (nlp->nlmsg_type == NLMSG_DONE))
@@ -134,7 +139,7 @@ void LinuxNetLink::threadMain() throw()
 					_processMessage(nlp, nll);
 					p = buf;
 					nll = 0;
-					continue;
+					break;
 				}
 				p += rtn;
 				nll += rtn;
@@ -144,7 +149,7 @@ void LinuxNetLink::threadMain() throw()
 				fprintf(stderr, "NLMSG_OVERRUN: Data lost\n");
 				p = buf;
 				nll = 0;
-				continue;
+				break;
 			}
 			
 			nll += rtn;
@@ -152,8 +157,21 @@ void LinuxNetLink::threadMain() throw()
 			_processMessage(nlp, nll);
 			p = buf;
 			nll = 0;
+			break;
+		} else {
+			break;
 		}
-		else {
+	}
+	return rtn;
+}
+
+void LinuxNetLink::threadMain() throw()
+{
+	int rtn = 0;
+
+	while(_running) {
+		rtn = _doRecv(_fd);
+		if (rtn <= 0) {
 			Thread::sleep(100);
 			continue;
 		}
@@ -258,6 +276,7 @@ void LinuxNetLink::_routeAdded(struct nlmsghdr *nlp)
 {
 	char dsts[40] = {0};
 	char gws[40] = {0};
+	char srcs[40] = {0};
 	char ifs[16] = {0};
 	char ms[24] = {0};
 
@@ -272,6 +291,9 @@ void LinuxNetLink::_routeAdded(struct nlmsghdr *nlp)
 		case RTA_DST:
 			inet_ntop(rtp->rtm_family, RTA_DATA(rtap), dsts, rtp->rtm_family == AF_INET ? 24 : 40);
 			break;
+		case RTA_SRC:
+			inet_ntop(rtp->rtm_family, RTA_DATA(rtap), srcs, rtp->rtm_family == AF_INET ? 24: 40);
+			break;
 		case RTA_GATEWAY:
 			inet_ntop(rtp->rtm_family, RTA_DATA(rtap), gws, rtp->rtm_family == AF_INET ? 24 : 40);
 			break;
@@ -282,13 +304,14 @@ void LinuxNetLink::_routeAdded(struct nlmsghdr *nlp)
 	}
 	sprintf(ms, "%d", rtp->rtm_dst_len);
 
-	fprintf(stderr, "Route Added: dst %s/%s gw %s if %s\n", dsts, ms, gws, ifs);
+	fprintf(stderr, "Route Added: dst %s/%s gw %s src %s if %s\n", dsts, ms, gws, srcs, ifs);
 }
 
 void LinuxNetLink::_routeDeleted(struct nlmsghdr *nlp)
 {
 	char dsts[40] = {0};
 	char gws[40] = {0};
+	char srcs[40] = {0};
 	char ifs[16] = {0};
 	char ms[24] = {0};
 
@@ -303,6 +326,9 @@ void LinuxNetLink::_routeDeleted(struct nlmsghdr *nlp)
 		case RTA_DST:
 			inet_ntop(rtp->rtm_family, RTA_DATA(rtap), dsts, rtp->rtm_family == AF_INET ? 24 : 40);
 			break;
+		case RTA_SRC:
+			inet_ntop(rtp->rtm_family, RTA_DATA(rtap), srcs, rtp->rtm_family == AF_INET ? 24 : 40);
+			break;
 		case RTA_GATEWAY:
 			inet_ntop(rtp->rtm_family, RTA_DATA(rtap), gws, rtp->rtm_family == AF_INET ? 24 : 40);
 			break;
@@ -313,7 +339,7 @@ void LinuxNetLink::_routeDeleted(struct nlmsghdr *nlp)
 	}
 	sprintf(ms, "%d", rtp->rtm_dst_len);
 
-	fprintf(stderr, "Route Deleted: dst %s/%s gw %s if %s\n", dsts, ms, gws, ifs);
+	fprintf(stderr, "Route Deleted: dst %s/%s gw %s src %s if %s\n", dsts, ms, gws, srcs, ifs);
 }
 
 void LinuxNetLink::_linkAdded(struct nlmsghdr *nlp)
@@ -348,12 +374,15 @@ void LinuxNetLink::_linkAdded(struct nlmsghdr *nlp)
 		}
 	}
 
-	struct iface_entry &entry = _interfaces[ifip->ifi_index];
-	entry.index = ifip->ifi_index;
-	memcpy(entry.ifacename, ifname, sizeof(ifname));
-	memcpy(entry.mac, mac, sizeof(mac));
-	memcpy(entry.mac_bin, mac_bin, 6);
-	entry.mtu = mtu;
+	{
+		Mutex::Lock l(_if_m);
+		struct iface_entry &entry = _interfaces[ifip->ifi_index];
+		entry.index = ifip->ifi_index;
+		memcpy(entry.ifacename, ifname, sizeof(ifname));
+		memcpy(entry.mac, mac, sizeof(mac));
+		memcpy(entry.mac_bin, mac_bin, 6);
+		entry.mtu = mtu;
+	}
 
 	fprintf(stderr, "Link Added: %s mac: %s, mtu: %d\n", ifname, mac, mtu);
 }
@@ -389,13 +418,33 @@ void LinuxNetLink::_linkDeleted(struct nlmsghdr *nlp)
 	}
 
 	fprintf(stderr, "Link Deleted: %s mac: %s, mtu: %d\n", ifname, mac, mtu);
-	if(_interfaces.contains(ifip->ifi_index)) {
-		_interfaces.erase(ifip->ifi_index);
+	{
+		Mutex::Lock l(_if_m);
+		if(_interfaces.contains(ifip->ifi_index)) {
+			_interfaces.erase(ifip->ifi_index);
+		}
 	}
 }
 
 void LinuxNetLink::_requestIPv4Routes()
 {
+	int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+	if (fd == -1) {
+		fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
+		return;
+	}
+
+	_setSocketTimeout(fd);
+
+	struct sockaddr_nl la;
+	la.nl_family = AF_NETLINK;
+	la.nl_pid = getpid();
+	la.nl_groups = RTMGRP_IPV4_ROUTE;
+	if(bind(fd, (struct sockaddr*)&la, sizeof(la))) {
+		fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
+		return;
+	}
+
 	struct nl_route_req req;
 	bzero(&req, sizeof(req));
 	req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
@@ -422,11 +471,32 @@ void LinuxNetLink::_requestIPv4Routes()
 	msg.msg_iov = &iov;
 	msg.msg_iovlen = 1;
 
-	sendmsg(_fd, &msg, 0);
+	sendmsg(fd, &msg, 0);
+
+	_doRecv(fd);
+
+	close(fd);
 }
 
 void LinuxNetLink::_requestIPv6Routes()
 {
+	int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+	if (fd == -1) {
+		fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
+		return;
+	}
+
+	_setSocketTimeout(fd);
+
+	struct sockaddr_nl la;
+	la.nl_family = AF_NETLINK;
+	la.nl_pid = getpid();
+	la.nl_groups = RTMGRP_IPV6_ROUTE;
+	if(bind(fd, (struct sockaddr*)&la, sizeof(struct sockaddr_nl))) {
+		fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
+		return;
+	}
+
 	struct nl_route_req req;
 	bzero(&req, sizeof(req));
 	req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
@@ -453,11 +523,32 @@ void LinuxNetLink::_requestIPv6Routes()
 	msg.msg_iov = &iov;
 	msg.msg_iovlen = 1;
 
-	sendmsg(_fd, &msg, 0);
+	sendmsg(fd, &msg, 0);
+
+	_doRecv(fd);
+
+	close(fd);
 }
 
 void LinuxNetLink::_requestInterfaceList()
 {
+	int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+	if (fd == -1) {
+		fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
+		return;
+	}
+
+	_setSocketTimeout(fd);
+
+	struct sockaddr_nl la;
+	la.nl_family = AF_NETLINK;
+	la.nl_pid = getpid();
+	la.nl_groups = RTMGRP_LINK;
+	if(bind(fd, (struct sockaddr*)&la, sizeof(struct sockaddr_nl))) {
+		fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
+		return;
+	}
+
 	struct nl_if_req req;
 	bzero(&req, sizeof(req));
 	req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
@@ -482,11 +573,43 @@ void LinuxNetLink::_requestInterfaceList()
 	iov.iov_len = req.nl.nlmsg_len;
 	msg.msg_iov = &iov;
 	msg.msg_iovlen = 1;
-	sendmsg(_fd, &msg, 0);
+	sendmsg(fd, &msg, 0);
+
+	_doRecv(fd);
+
+	close(fd);
 }
 
-void LinuxNetLink::addRoute(const InetAddress &target, const InetAddress &via, const char *ifaceName)
+void LinuxNetLink::addRoute(const InetAddress &target, const InetAddress &via, const InetAddress &src, const char *ifaceName)
 {
+	int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+	if (fd == -1) {
+		fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
+		return;
+	}
+
+	_setSocketTimeout(fd);
+
+	struct sockaddr_nl la;
+	bzero(&la, sizeof(la));
+	la.nl_family = AF_NETLINK;
+	la.nl_pid = getpid();
+
+	if(bind(fd, (struct sockaddr*)&la, sizeof(struct sockaddr_nl))) {
+		fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
+		return;
+	}
+
+	char  tmp[64];
+	char tmp2[64];
+	char tmp3[64];
+	fprintf(stderr, "Adding Route. target: %s via: %s src: %s iface: %s\n", target.toString(tmp), via.toString(tmp2), src.toString(tmp3), ifaceName);
+
+	if(!target) {
+		fprintf(stderr, "Uhhhh adding an empty route?!?!?");
+		return;
+	}
+
 	int rtl = sizeof(struct rtmsg);
 	struct nl_route_req req;
 	bzero(&req, sizeof(req));
@@ -494,49 +617,54 @@ void LinuxNetLink::addRoute(const InetAddress &target, const InetAddress &via, c
 	struct rtattr *rtap = (struct rtattr *)req.buf;
 	rtap->rta_type = RTA_DST;
 	if (target.isV4()) {
-		rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in_addr);
-		memcpy((void*)((char*)rtap+sizeof(struct rtattr)), &((struct sockaddr_in*)&target)->sin_addr, sizeof(struct in_addr));
+		rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
+		memcpy(RTA_DATA(rtap), &((struct sockaddr_in*)&target)->sin_addr, sizeof(struct in_addr));
 	} else {
-		rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in6_addr);
-		memcpy((void*)((char*)rtap+sizeof(struct rtattr)), &((struct sockaddr_in6*)&target)->sin6_addr, sizeof(struct in6_addr));
+		rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
+		memcpy(RTA_DATA(rtap), &((struct sockaddr_in6*)&target)->sin6_addr, sizeof(struct in6_addr));
 	}
 	rtl += rtap->rta_len;
 
-	int interface_index = -1;
-	if (ifaceName != NULL) {
-		Hashtable<int, iface_entry>::Iterator iter(_interfaces);
-		int *k = NULL;
-		iface_entry *v = NULL;
-		while(iter.next(k, v)) {
-			if(strcmp(ifaceName, v->ifacename) == 0) {
-				interface_index = v->index;
-				break;
-			}
-		}
-		if (interface_index != -1) {
-			rtap = (struct rtattr *) (((char*)rtap) + rtap->rta_len);
-			rtap->rta_type = RTA_OIF;
-			rtap->rta_len = sizeof(struct rtattr)+sizeof(int);
-			memcpy(((char*)rtap)+sizeof(rtattr), &interface_index, sizeof(int));
-			rtl += rtap->rta_len;
-		}
-	}
-
 	if(via) {
 		rtap = (struct rtattr *)(((char*)rtap)+rtap->rta_len);
 		rtap->rta_type = RTA_GATEWAY;
 		if(via.isV4()) {
-			rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in_addr);
-			memcpy((char*)rtap+sizeof(struct rtattr), &((struct sockaddr_in*)&via)->sin_addr, sizeof(struct in_addr));
+			rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
+			memcpy(RTA_DATA(rtap), &((struct sockaddr_in*)&via)->sin_addr, sizeof(struct in_addr));
 		} else {
-			rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in6_addr);
-			memcpy((char*)rtap+sizeof(struct rtattr), &((struct sockaddr_in6*)&via)->sin6_addr, sizeof(struct in6_addr));
+			rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
+			memcpy(RTA_DATA(rtap), &((struct sockaddr_in6*)&via)->sin6_addr, sizeof(struct in6_addr));
 		}
 		rtl += rtap->rta_len;
+	} else if (src) {
+		rtap = (struct rtattr *)(((char*)rtap)+rtap->rta_len);
+		rtap->rta_type = RTA_SRC;
+		if(src.isV4()) {
+			rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
+			memcpy(RTA_DATA(rtap), &((struct sockaddr_in*)&src)->sin_addr, sizeof(struct in_addr));
+			
+		} else {
+			rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
+			memcpy(RTA_DATA(rtap), &((struct sockaddr_in6*)&src)->sin6_addr, sizeof(struct in6_addr));
+		}
+		req.rt.rtm_src_len = src.netmaskBits();
 	}
 
+	if (ifaceName != NULL) {
+		int interface_index = _indexForInterface(ifaceName);
+		if (interface_index != -1) {
+			rtap = (struct rtattr *) (((char*)rtap) + rtap->rta_len);
+			rtap->rta_type = RTA_OIF;
+			rtap->rta_len = RTA_LENGTH(sizeof(int));
+			memcpy(RTA_DATA(rtap), &interface_index, sizeof(int));
+			rtl += rtap->rta_len;
+		}
+	}
+
+	
+
 	req.nl.nlmsg_len = NLMSG_LENGTH(rtl);
-	req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
+	req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_EXCL | NLM_F_CREATE | NLM_F_ACK;
 	req.nl.nlmsg_type = RTM_NEWROUTE;
 	req.nl.nlmsg_pid = 0;
 	req.nl.nlmsg_seq = ++_seq;
@@ -546,6 +674,7 @@ void LinuxNetLink::addRoute(const InetAddress &target, const InetAddress &via, c
 	req.rt.rtm_scope = RT_SCOPE_UNIVERSE;
 	req.rt.rtm_type = RTN_UNICAST;
 	req.rt.rtm_dst_len = target.netmaskBits();
+	req.rt.rtm_flags = 0;
 
 	struct sockaddr_nl pa;
 	bzero(&pa, sizeof(pa));
@@ -562,11 +691,41 @@ void LinuxNetLink::addRoute(const InetAddress &target, const InetAddress &via, c
 	iov.iov_len = req.nl.nlmsg_len;
 	msg.msg_iov = &iov;
 	msg.msg_iovlen = 1;
-	sendmsg(_fd, &msg, 0);
+	sendmsg(fd, &msg, 0);
+
+	_doRecv(fd);
+
+	close(fd);
 }
 
-void LinuxNetLink::delRoute(const InetAddress &target, const InetAddress &via, const char *ifaceName)
+void LinuxNetLink::delRoute(const InetAddress &target, const InetAddress &via, const InetAddress &src, const char *ifaceName)
 {
+	int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+	if (fd == -1) {
+		fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
+		return;
+	}
+
+	_setSocketTimeout(fd);
+
+	struct sockaddr_nl la;
+	la.nl_family = AF_NETLINK;
+	la.nl_pid = getpid();
+
+	if(bind(fd, (struct sockaddr*)&la, sizeof(struct sockaddr_nl))) {
+		fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
+		return;
+	}
+	char  tmp[64];
+	char tmp2[64];
+	char tmp3[64];
+	fprintf(stderr, "Removing Route. target: %s via: %s src: %s iface: %s\n", target.toString(tmp), via.toString(tmp2), src.toString(tmp3), ifaceName);
+	
+	if(!target) {
+		fprintf(stderr, "Uhhhh deleting an empty route?!?!?");
+		return;
+	}
+
 	int rtl = sizeof(struct rtmsg);
 	struct nl_route_req req;
 	bzero(&req, sizeof(req));
@@ -574,47 +733,52 @@ void LinuxNetLink::delRoute(const InetAddress &target, const InetAddress &via, c
 	struct rtattr *rtap = (struct rtattr *)req.buf;
 	rtap->rta_type = RTA_DST;
 	if (target.isV4()) {
-		rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in_addr);
-		memcpy((void*)((char*)rtap+sizeof(struct rtattr)), &((struct sockaddr_in*)&target)->sin_addr, sizeof(struct in_addr));
+		rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
+		memcpy(RTA_DATA(rtap), &((struct sockaddr_in*)&target)->sin_addr, sizeof(struct in_addr));
 	} else {
-		rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in6_addr);
-		memcpy((void*)((char*)rtap+sizeof(struct rtattr)), &((struct sockaddr_in6*)&target)->sin6_addr, sizeof(struct in6_addr));
+		rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
+		memcpy(RTA_DATA(rtap), &((struct sockaddr_in6*)&target)->sin6_addr, sizeof(struct in6_addr));
 	}
 	rtl += rtap->rta_len;
 
-	int interface_index = -1;
-	if (ifaceName != NULL) {
-		Hashtable<int, iface_entry>::Iterator iter(_interfaces);
-		int *k = NULL;
-		iface_entry *v = NULL;
-		while(iter.next(k, v)) {
-			if(strcmp(ifaceName, v->ifacename) == 0) {
-				interface_index = v->index;
-				break;
-			}
-		}
-		if (interface_index != -1) {
-			rtap = (struct rtattr *) (((char*)rtap) + rtap->rta_len);
-			rtap->rta_type = RTA_OIF;
-			rtap->rta_len = sizeof(struct rtattr)+sizeof(int);
-			memcpy(((char*)rtap)+sizeof(rtattr), &interface_index, sizeof(int));
-			rtl += rtap->rta_len;
-		}
-	}
-
 	if(via) {
 		rtap = (struct rtattr *)(((char*)rtap)+rtap->rta_len);
 		rtap->rta_type = RTA_GATEWAY;
 		if(via.isV4()) {
-			rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in_addr);
-			memcpy((char*)rtap+sizeof(struct rtattr), &((struct sockaddr_in*)&via)->sin_addr, sizeof(struct in_addr));
+			rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
+			memcpy(RTA_DATA(rtap), &((struct sockaddr_in*)&via)->sin_addr, sizeof(struct in_addr));
 		} else {
-			rtap->rta_len = sizeof(struct rtattr)+sizeof(struct in6_addr);
-			memcpy((char*)rtap+sizeof(struct rtattr), &((struct sockaddr_in6*)&via)->sin6_addr, sizeof(struct in6_addr));
+			rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
+			memcpy(RTA_DATA(rtap), &((struct sockaddr_in6*)&via)->sin6_addr, sizeof(struct in6_addr));
 		}
 		rtl += rtap->rta_len;
+	} else if (src) {
+		rtap = (struct rtattr *)(((char*)rtap)+rtap->rta_len);
+		rtap->rta_type = RTA_SRC;
+		if(src.isV4()) {
+			rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
+			memcpy(RTA_DATA(rtap), &((struct sockaddr_in*)&src)->sin_addr, sizeof(struct in_addr));
+			
+		} else {
+			rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
+			memcpy(RTA_DATA(rtap), &((struct sockaddr_in6*)&src)->sin6_addr, sizeof(struct in6_addr));
+		}
+		req.rt.rtm_src_len = src.netmaskBits();
 	}
 
+	if (ifaceName != NULL) {
+		int interface_index = _indexForInterface(ifaceName);
+		if (interface_index != -1) {
+			rtap = (struct rtattr *) (((char*)rtap) + rtap->rta_len);
+			rtap->rta_type = RTA_OIF;
+			rtap->rta_len = RTA_LENGTH(sizeof(int));
+			memcpy(RTA_DATA(rtap), &interface_index, sizeof(int));
+			rtl += rtap->rta_len;
+		}
+	}
+
+	
+
 	req.nl.nlmsg_len = NLMSG_LENGTH(rtl);
 	req.nl.nlmsg_flags = NLM_F_REQUEST;
 	req.nl.nlmsg_type = RTM_DELROUTE;
@@ -626,6 +790,7 @@ void LinuxNetLink::delRoute(const InetAddress &target, const InetAddress &via, c
 	req.rt.rtm_scope = RT_SCOPE_UNIVERSE;
 	req.rt.rtm_type = RTN_UNICAST;
 	req.rt.rtm_dst_len = target.netmaskBits();
+	req.rt.rtm_flags = 0;
 
 	struct sockaddr_nl pa;
 	bzero(&pa, sizeof(pa));
@@ -642,73 +807,226 @@ void LinuxNetLink::delRoute(const InetAddress &target, const InetAddress &via, c
 	iov.iov_len = req.nl.nlmsg_len;
 	msg.msg_iov = &iov;
 	msg.msg_iovlen = 1;
-	sendmsg(_fd, &msg, 0);
-}
+	sendmsg(fd, &msg, 0);
 
-// void LinuxNetLink::addInterface(const char *iface, unsigned int mtu, const MAC &mac)
-// {
-// 	int rtl = sizeof(struct ifinfomsg);
-// 	struct nl_if_req req;
-// 	bzero(&req, sizeof(nl_if_req));
-
-// 	struct rtattr *rtap = (struct rtattr *)req.buf;
-// 	rtap->rta_type = IFLA_IFNAME;
-// 	rtap->rta_len =  sizeof(struct rtattr)+strlen(iface)+1;
-// 	rtl += rtap->rta_len;
-
-// 	rtap = (struct rtattr*)(((char*)rtap)+rtap->rta_len);
-// 	rtap->rta_type = IFLA_MTU;
-// 	rtap->rta_len = sizeof(struct rtattr)+sizeof(unsigned int);
-// 	rtl += rtap->rta_len;
-
-// 	rtap = (struct rtattr*)(((char*)rtap)+rtap->rta_len);
-// 	rtap->rta_type = IFLA_ADDRESS;
-// 	rtap->rta_len = sizeof(struct rtattr)+6;
-// 	mac.copyTo(((char*)rtap)+sizeof(struct rtattr), 6);
-// 	rtl += rtap->rta_len;
-
-// 	IFLA_LINKINFO;
-// 	req.nl.nlmsg_len = NLMSG_LENGTH(rtl);
-// 	req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
-// 	req.nl.nlmsg_type = RTM_NEWLINK;
-// 	req.nl.nlmsg_pid = 0;
-// 	req.nl.nlmsg_seq = ++_seq;
-
-// 	req.ifa.ifi_family = AF_UNSPEC;
-// 	req.ifa.ifi_type = 0; // TODO figure this one out
-// 	req.ifa.ifi_index = 0;
-// 	req.ifa.ifi_flags = IFF_UP;
-
-// 	struct sockaddr_nl pa;
-// 	bzero(&pa, sizeof(pa));
-// 	pa.nl_family = AF_NETLINK;
-
-// 	struct msghdr msg;
-// 	bzero(&msg, sizeof(msg));
-// 	msg.msg_name = (void*)&pa;
-// 	msg.msg_namelen = sizeof(pa);
-
-// 	struct iovec iov;
-// 	iov.iov_base = (void*)&req.nl;
-// 	iov.iov_len = req.nl.nlmsg_len;
-// 	msg.msg_iov = &iov;
-// 	msg.msg_iovlen = 1;
-// 	sendmsg(_fd, &msg, 0);
-// }
-
-// void LinuxNetLink::removeInterface(const char *iface)
-// {
-
-// }
+	_doRecv(fd);
+
+	close(fd);
+}
 
 void LinuxNetLink::addAddress(const InetAddress &addr, const char *iface)
 {
+	int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+	if (fd == -1) {
+		fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
+		return;
+	}
 
+	_setSocketTimeout(fd);
+
+	struct sockaddr_nl la;
+	la.nl_family = AF_NETLINK;
+	la.nl_pid = getpid();
+	if (addr.isV4()) {
+		la.nl_groups = RTMGRP_IPV4_IFADDR;
+	} else {
+		la.nl_groups = RTMGRP_IPV6_IFADDR;
+	}
+	if(bind(fd, (struct sockaddr*)&la, sizeof(struct sockaddr_nl))) {
+		fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
+		return;
+	}
+
+	char tmp[128];
+	fprintf(stderr, "Adding IP address %s to interface %s", addr.toString(tmp), iface);
+	int interface_index = _indexForInterface(iface);
+
+	if (interface_index == -1) {
+		fprintf(stderr, "Unable to find index for interface %s\n", iface);
+		return;
+	}
+	
+	int rtl = sizeof(struct ifaddrmsg);
+	struct nl_adr_req req;
+	bzero(&req, sizeof(struct nl_adr_req));
+
+	struct rtattr *rtap = (struct rtattr *)req.buf;;
+	if(addr.isV4()) {
+		struct sockaddr_in *addr_v4 = (struct sockaddr_in*)&addr;
+		rtap->rta_type = IFA_ADDRESS;
+		rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
+		memcpy(RTA_DATA(rtap), &addr_v4->sin_addr, sizeof(struct in_addr));
+		rtl += rtap->rta_len;
+
+		rtap = (struct rtattr*)(((char*)rtap) + rtap->rta_len);
+		rtap->rta_type = IFA_LOCAL;
+		rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
+		memcpy(RTA_DATA(rtap), &addr_v4->sin_addr, sizeof(struct in_addr));
+		rtl += rtap->rta_len;
+
+		InetAddress broadcast = addr.broadcast();
+		if(broadcast) {
+			rtap = (struct rtattr*)(((char*)rtap)+rtap->rta_len);
+			struct sockaddr_in *bcast = (struct sockaddr_in*)&broadcast;
+			rtap->rta_type = IFA_BROADCAST;
+			rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
+			memcpy(RTA_DATA(rtap), &bcast->sin_addr, sizeof(struct in_addr));
+			rtl += rtap->rta_len;
+		}
+	} else { //V6
+		rtap->rta_type = IFA_ADDRESS;
+		struct sockaddr_in6 *addr_v6 = (struct sockaddr_in6*)&addr;
+		rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
+		memcpy(RTA_DATA(rtap), &addr_v6->sin6_addr, sizeof(struct in6_addr));
+		rtl += rtap->rta_len;
+	}
+
+	if (iface) {
+		rtap = (struct rtattr*)(((char*)rtap)+rtap->rta_len);
+		rtap->rta_type = IFA_LABEL;
+		rtap->rta_len = RTA_LENGTH(strlen(iface));
+		memcpy(RTA_DATA(rtap), iface, strlen(iface));
+		rtl += rtap->rta_len;
+	}
+
+	req.nl.nlmsg_len = NLMSG_LENGTH(rtl);
+	req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
+	req.nl.nlmsg_type = RTM_NEWADDR;
+	req.nl.nlmsg_pid = 0;
+	req.nl.nlmsg_seq = ++_seq;
+	req.ifa.ifa_family = addr.ss_family;
+	req.ifa.ifa_prefixlen = addr.port();
+	req.ifa.ifa_flags = IFA_F_PERMANENT;
+	req.ifa.ifa_scope = 0;
+	req.ifa.ifa_index = interface_index;
+
+	struct sockaddr_nl pa;
+	bzero(&pa, sizeof(sockaddr_nl));
+	pa.nl_family = AF_NETLINK;
+
+	struct msghdr msg;
+	bzero(&msg, sizeof(msg));
+	msg.msg_name = (void*)&pa;
+	msg.msg_namelen = sizeof(pa);
+
+	struct iovec iov;
+	iov.iov_base = (void*)&req.nl;
+	iov.iov_len = req.nl.nlmsg_len;
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	sendmsg(fd, &msg, 0);
+
+	_doRecv(fd);
+
+	close(fd);
 }
 
 void LinuxNetLink::removeAddress(const InetAddress &addr, const char *iface)
 {
+	int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+	if (fd == -1) {
+		fprintf(stderr, "Error opening RTNETLINK socket: %s\n", strerror(errno));
+		return;
+	}
+
+	_setSocketTimeout(fd);
+
+	struct sockaddr_nl la;
+	la.nl_family = AF_NETLINK;
+	la.nl_pid = getpid();
+	if (addr.isV4()) {
+		la.nl_groups = RTMGRP_IPV4_IFADDR;
+	} else {
+		la.nl_groups = RTMGRP_IPV6_IFADDR;
+	}
+	if(bind(fd, (struct sockaddr*)&la, sizeof(struct sockaddr_nl))) {
+		fprintf(stderr, "Error binding RTNETLINK: %s\n", strerror(errno));
+		return;
+	}
+
+	char tmp[128];
+	fprintf(stderr, "Removing IP address %s from interface %s", addr.toString(tmp), iface);
+
+	int interface_index = _indexForInterface(iface);
+
+	if (interface_index == -1) {
+		fprintf(stderr, "Unable to find index for interface %s\n", iface);
+		return;
+	}
+	
+	int rtl = sizeof(struct ifaddrmsg);
+	struct nl_adr_req req;
+	bzero(&req, sizeof(struct nl_adr_req));
+
+	struct rtattr *rtap = (struct rtattr *)req.buf;
+	if(addr.isV4()) {
+		struct sockaddr_in *addr_v4 = (struct sockaddr_in*)&addr;
+		rtap->rta_type = IFA_ADDRESS;
+		rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
+		memcpy(RTA_DATA(rtap), &addr_v4->sin_addr, sizeof(struct in_addr));
+		rtl += rtap->rta_len;
+
+		rtap = (struct rtattr*)(((char*)rtap) + rtap->rta_len);
+		rtap->rta_type = IFA_LOCAL;
+		rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
+		memcpy(RTA_DATA(rtap), &addr_v4->sin_addr, sizeof(struct in_addr));
+		rtl += rtap->rta_len;
+
+		InetAddress broadcast = addr.broadcast();
+		if(broadcast) {
+			rtap = (struct rtattr*)(((char*)rtap)+rtap->rta_len);
+			struct sockaddr_in *bcast = (struct sockaddr_in*)&broadcast;
+			rtap->rta_type = IFA_BROADCAST;
+			rtap->rta_len = RTA_LENGTH(sizeof(struct in_addr));
+			memcpy(RTA_DATA(rtap), &bcast->sin_addr, sizeof(struct in_addr));
+			rtl += rtap->rta_len;
+		}
+	} else { //V6
+		rtap->rta_type = IFA_ADDRESS;
+		struct sockaddr_in6 *addr_v6 = (struct sockaddr_in6*)&addr;
+		rtap->rta_len = RTA_LENGTH(sizeof(struct in6_addr));
+		memcpy(RTA_DATA(rtap), &addr_v6->sin6_addr, sizeof(struct in6_addr));
+		rtl += rtap->rta_len;
+	}
+
+	if (iface) {
+		rtap = (struct rtattr*)(((char*)rtap)+rtap->rta_len);
+		rtap->rta_type = IFA_LABEL;
+		rtap->rta_len = RTA_LENGTH(strlen(iface));
+		memcpy(RTA_DATA(rtap), iface, strlen(iface));
+		rtl += rtap->rta_len;
+	}
+
+	req.nl.nlmsg_len = NLMSG_LENGTH(rtl);
+	req.nl.nlmsg_flags = NLM_F_REQUEST;
+	req.nl.nlmsg_type = RTM_DELADDR;
+	req.nl.nlmsg_pid = 0;
+	req.nl.nlmsg_seq = ++_seq;
+	req.ifa.ifa_family = addr.ss_family;
+	req.ifa.ifa_prefixlen = addr.port();
+	req.ifa.ifa_flags = IFA_F_PERMANENT;
+	req.ifa.ifa_scope = 0;
+	req.ifa.ifa_index = interface_index;
+
+	struct sockaddr_nl pa;
+	bzero(&pa, sizeof(sockaddr_nl));
+	pa.nl_family = AF_NETLINK;
+
+	struct msghdr msg;
+	bzero(&msg, sizeof(msg));
+	msg.msg_name = (void*)&pa;
+	msg.msg_namelen = sizeof(pa);
 
+	struct iovec iov;
+	iov.iov_base = (void*)&req.nl;
+	iov.iov_len = req.nl.nlmsg_len;
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	sendmsg(fd, &msg, 0);
+
+	_doRecv(fd);
+
+	close(fd);
 }
 
 RouteList LinuxNetLink::getIPV4Routes() const 
@@ -721,4 +1039,20 @@ RouteList LinuxNetLink::getIPV6Routes() const
 	return _routes_ipv6;
 }
 
-} // namespace ZeroTier
+int LinuxNetLink::_indexForInterface(const char *iface)
+{
+	Mutex::Lock l(_if_m);
+	int interface_index = -1;
+	Hashtable<int, iface_entry>::Iterator iter(_interfaces);
+	int *k = NULL;
+	iface_entry *v = NULL;
+	while(iter.next(k,v)) {
+		if(strcmp(iface, v->ifacename) == 0) {
+			interface_index = v->index;
+			break;
+		}
+	}
+	return interface_index;
+}
+
+} // namespace ZeroTier

osdep/LinuxNetLink.hpp

@@ -39,6 +39,7 @@
 #include "../node/MAC.hpp"
 #include "Thread.hpp"
 #include "../node/Hashtable.hpp"
+#include "../node/Mutex.hpp"
 
 
 namespace ZeroTier {
@@ -70,19 +71,18 @@ public:
     LinuxNetLink(LinuxNetLink const&) = delete;
     void operator=(LinuxNetLink const&) = delete;
 
-    void addRoute(const InetAddress &target, const InetAddress &via, const char *ifaceName);
-    void delRoute(const InetAddress &target, const InetAddress &via, const char *ifaceName);
+    void addRoute(const InetAddress &target, const InetAddress &via, const InetAddress &src, const char *ifaceName);
+    void delRoute(const InetAddress &target, const InetAddress &via, const InetAddress &src, const char *ifaceName);
     RouteList getIPV4Routes() const;
     RouteList getIPV6Routes() const;
 
-    // void addInterface(const char *iface, unsigned int mtu, const MAC &mac);
-    // void removeInterface(const char *iface);
-
     void addAddress(const InetAddress &addr, const char *iface);
     void removeAddress(const InetAddress &addr, const char *iface);
 
     void threadMain() throw();
 private:
+    int _doRecv(int fd);
+
     void _processMessage(struct nlmsghdr *nlp, int nll);
     void _routeAdded(struct nlmsghdr *nlp);
     void _routeDeleted(struct nlmsghdr *nlp);
@@ -95,12 +95,17 @@ private:
     void _requestIPv4Routes();
     void _requestIPv6Routes();
 
+    int _indexForInterface(const char *iface);
+
+    void _setSocketTimeout(int fd, int seconds = 1);
 
     Thread _t;
     bool _running;
 
     RouteList _routes_ipv4;
+    Mutex _rv4_m;
     RouteList _routes_ipv6;
+    Mutex _rv6_m;
 
     uint32_t _seq;
 
@@ -112,6 +117,7 @@ private:
         unsigned int mtu;
     };
     Hashtable<int, iface_entry> _interfaces;
+    Mutex _if_m;
 
     // socket communication vars;
     int _fd;

osdep/ManagedRoute.cpp

@@ -285,21 +285,23 @@ static void _routeCmd(const char *op,const InetAddress &target,const InetAddress
 #ifdef __LINUX__ // ----------------------------------------------------------
 #define ZT_ROUTING_SUPPORT_FOUND 1
 
-static void _routeCmd(const char *op, const InetAddress &target, const InetAddress &via, const char *localInterface) 
+static void _routeCmd(const char *op, const InetAddress &target, const InetAddress &via, const InetAddress &src, const char *localInterface) 
 {
-	if ((strcmp(op, "add") == 0 || strcmp(op, "replace") == 0)) {
-		LinuxNetLink::getInstance().addRoute(target, via, localInterface);
-	} else if ((strcmp(op, "remove") == 0 || strcmp(op, "del") == 0)) {
-		LinuxNetLink::getInstance().delRoute(target, via, localInterface);
-	}
-	return;
-
 	char targetStr[64] = {0};
 	char viaStr[64] = {0};
 	InetAddress nmsk = target.netmask();
 	char nmskStr[64] = {0};
 	fprintf(stderr, "Received Route Cmd: %s target: %s via: %s netmask: %s localInterface: %s\n", op, target.toString(targetStr), via.toString(viaStr), nmsk.toString(nmskStr), localInterface);
 
+
+	if ((strcmp(op, "add") == 0 || strcmp(op, "replace") == 0)) {
+		LinuxNetLink::getInstance().addRoute(target, via, src, localInterface);
+	} else if ((strcmp(op, "remove") == 0 || strcmp(op, "del") == 0)) {
+		LinuxNetLink::getInstance().delRoute(target, via, src, localInterface);
+	}
+	return;
+
+	
 	int fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);;
 	struct rtentry route = {0};
 
@@ -600,11 +602,11 @@ bool ManagedRoute::sync()
 
 	if (!_applied.count(leftt)) {
 		_applied[leftt] = false; // boolean unused
-		_routeCmd("replace",leftt,_via,(_via) ? (const char *)0 : _device);
+		_routeCmd("replace",leftt,_via,_src,_device);
 	}
 	if ((rightt)&&(!_applied.count(rightt))) {
 		_applied[rightt] = false; // boolean unused
-		_routeCmd("replace",rightt,_via,(_via) ? (const char *)0 : _device);
+		_routeCmd("replace",rightt,_via,_src,_device);
 	}
 
 #endif // __LINUX__ ----------------------------------------------------------
@@ -651,7 +653,7 @@ void ManagedRoute::remove()
 #endif // __BSD__ ------------------------------------------------------------
 
 #ifdef __LINUX__ // ----------------------------------------------------------
-		_routeCmd("del",r->first,_via,(_via) ? (const char *)0 : _device);
+		_routeCmd("del",r->first,_via,_src,_device);
 #endif // __LINUX__ ----------------------------------------------------------
 
 #ifdef __WINDOWS__ // --------------------------------------------------------

osdep/ManagedRoute.hpp

@@ -49,14 +49,20 @@ class ManagedRoute
 	friend class SharedPtr<ManagedRoute>;
 
 public:
-	ManagedRoute(const InetAddress &target,const InetAddress &via,const char *device)
+	ManagedRoute(const InetAddress &target,const InetAddress &via,const InetAddress &src,const char *device)
 	{
 		_target = target;
 		_via = via;
+		_src = src;
 		if (via.ss_family == AF_INET)
 			_via.setPort(32);
 		else if (via.ss_family == AF_INET6)
 			_via.setPort(128);
+		if (src.ss_family == AF_INET) {
+			_src.setPort(32);
+		} else if (src.ss_family == AF_INET6) {
+			_src.setPort(128);
+		}
 		Utils::scopy(_device,sizeof(_device),device);
 		_systemDevice[0] = (char)0;
 	}
@@ -87,6 +93,7 @@ public:
 
 	inline const InetAddress &target() const { return _target; }
 	inline const InetAddress &via() const { return _via; }
+	inline const InetAddress &src() const { return _src; }
 	inline const char *device() const { return _device; }
 
 private:
@@ -95,6 +102,7 @@ private:
 
 	InetAddress _target;
 	InetAddress _via;
+	InetAddress _src;
 	InetAddress _systemVia; // for route overrides
 	std::map<InetAddress,bool> _applied; // routes currently applied
 	char _device[128];

service/OneService.cpp

@@ -1631,6 +1631,17 @@ public:
 			for(unsigned int i=0;i<n.config.routeCount;++i) {
 				const InetAddress *const target = reinterpret_cast<const InetAddress *>(&(n.config.routes[i].target));
 				const InetAddress *const via = reinterpret_cast<const InetAddress *>(&(n.config.routes[i].via));
+				InetAddress *src = NULL;
+				for (unsigned int j=0; j<n.config.assignedAddressCount; ++j) {
+					const InetAddress *const tmp = reinterpret_cast<const InetAddress *>(&(n.config.assignedAddresses[j]));
+					if (target->isV4() && tmp->isV4()) {
+						src = reinterpret_cast<InetAddress *>(&(n.config.assignedAddresses[j]));
+						break;
+					} else if (target->isV6() && tmp->isV6()) {
+						src = reinterpret_cast<InetAddress *>(&(n.config.assignedAddresses[j]));
+						break;
+					}
+				}
 
 				if ( (!checkIfManagedIsAllowed(n,*target)) || ((via->ss_family == target->ss_family)&&(matchIpOnly(myIps,*via))) )
 					continue;
@@ -1662,7 +1673,7 @@ public:
 					continue;
 
 				// Add and apply new routes
-				n.managedRoutes.push_back(SharedPtr<ManagedRoute>(new ManagedRoute(*target,*via,tapdev)));
+				n.managedRoutes.push_back(SharedPtr<ManagedRoute>(new ManagedRoute(*target,*via,*src,tapdev)));
 				if (!n.managedRoutes.back()->sync())
 					n.managedRoutes.pop_back();
 			}