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add/remove routes via rtnetlink

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This commit is contained in:
Grant Limberg 2018-05-25 14:18:06 -07:00
parent 7da4b0af15
commit be469f4dd0
4 changed files with 538 additions and 359 deletions
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4
node/Hashtable.hpp
View File

@ -399,6 +399,10 @@ private:
{
return ((unsigned long)i * (unsigned long)0x9e3779b1);
}
static inline unsigned long _hc(const int i)
{
return ((unsigned long)i * (unsigned long)0x9e3379b1);
}
inline void _grow()
{

824
osdep/LinuxNetLink.cpp
View File

@ -30,408 +30,608 @@
namespace ZeroTier {
struct nl_route_req {
struct nlmsghdr nl;
struct rtmsg rt;
char buf[8192];
};
struct nl_if_req {
struct nlmsghdr nl;
struct ifinfomsg ifa;
char buf[8192];
};
LinuxNetLink::LinuxNetLink()
: _t()
, _running(false)
, _routes_ipv4()
, _routes_ipv6()
, _seq(0)
, _fd(socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE))
, _la({0})
: _t()
, _running(false)
, _routes_ipv4()
, _routes_ipv6()
, _seq(0)
, _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));
}
// 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));
}
_la.nl_family = AF_NETLINK;
_la.nl_pid = getpid();
_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);
}
_la.nl_family = AF_NETLINK;
_la.nl_pid = getpid();
_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);
_running = true;
_t = Thread::start(this);
fprintf(stderr, "Requesting IPV4 Routes\n");
_requestIPv4Routes();
Thread::sleep(10);
fprintf(stderr, "Requesting IPV6 Routes\n");
_requestIPv6Routes();
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();
}
LinuxNetLink::~LinuxNetLink()
{
_running = false;
Thread::join(_t);
_running = false;
Thread::join(_t);
::close(_fd);
::close(_fd);
}
void LinuxNetLink::threadMain() throw()
{
char buf[8192];
char *p = NULL;
struct nlmsghdr *nlp;
int nll = 0;
int rtn = 0;
p = buf;
char buf[8192];
char *p = NULL;
struct nlmsghdr *nlp;
int nll = 0;
int rtn = 0;
p = buf;
while(_running) {
rtn = recv(_fd, p, sizeof(buf) - nll, 0);
while(_running) {
rtn = recv(_fd, p, sizeof(buf) - nll, 0);
if (rtn > 0) {
nlp = (struct nlmsghdr *)p;
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;
}
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;
}
if (nlp->nlmsg_type == NLMSG_NOOP) {
fprintf(stderr, "noop\n");
continue;
}
if (nlp->nlmsg_type == NLMSG_NOOP) {
fprintf(stderr, "noop\n");
continue;
}
if( (nlp->nlmsg_flags & NLM_F_MULTI) == NLM_F_MULTI || (nlp->nlmsg_type == NLMSG_DONE))
{
if (nlp->nlmsg_type == NLMSG_DONE) {
_processMessage(nlp, nll);
p = buf;
nll = 0;
continue;
}
p += rtn;
nll += rtn;
}
if( (nlp->nlmsg_flags & NLM_F_MULTI) == NLM_F_MULTI || (nlp->nlmsg_type == NLMSG_DONE))
{
if (nlp->nlmsg_type == NLMSG_DONE) {
_processMessage(nlp, nll);
p = buf;
nll = 0;
continue;
}
p += rtn;
nll += rtn;
}
if (nlp->nlmsg_type == NLMSG_OVERRUN) {
fprintf(stderr, "NLMSG_OVERRUN: Data lost\n");
p = buf;
nll = 0;
continue;
}
nll += rtn;
if (nlp->nlmsg_type == NLMSG_OVERRUN) {
fprintf(stderr, "NLMSG_OVERRUN: Data lost\n");
p = buf;
nll = 0;
continue;
}
nll += rtn;
_processMessage(nlp, nll);
p = buf;
nll = 0;
}
else {
Thread::sleep(100);
continue;
}
}
_processMessage(nlp, nll);
p = buf;
nll = 0;
}
else {
Thread::sleep(100);
continue;
}
}
}
void LinuxNetLink::_processMessage(struct nlmsghdr *nlp, int nll)
{
for(; NLMSG_OK(nlp, nll); nlp=NLMSG_NEXT(nlp, nll))
{
switch(nlp->nlmsg_type)
{
case RTM_NEWLINK:
_linkAdded(nlp);
break;
case RTM_DELLINK:
_linkDeleted(nlp);
break;
case RTM_NEWADDR:
_ipAddressAdded(nlp);
break;
case RTM_DELADDR:
_ipAddressDeleted(nlp);
break;
case RTM_NEWROUTE:
_routeAdded(nlp);
break;
case RTM_DELROUTE:
_routeDeleted(nlp);
break;
default:
fprintf(stderr, "ignore msgtype %d...\n", nlp->nlmsg_type);
}
}
for(; NLMSG_OK(nlp, nll); nlp=NLMSG_NEXT(nlp, nll))
{
switch(nlp->nlmsg_type)
{
case RTM_NEWLINK:
_linkAdded(nlp);
break;
case RTM_DELLINK:
_linkDeleted(nlp);
break;
case RTM_NEWADDR:
_ipAddressAdded(nlp);
break;
case RTM_DELADDR:
_ipAddressDeleted(nlp);
break;
case RTM_NEWROUTE:
_routeAdded(nlp);
break;
case RTM_DELROUTE:
_routeDeleted(nlp);
break;
default:
fprintf(stderr, "ignore msgtype %d...\n", nlp->nlmsg_type);
}
}
}
void LinuxNetLink::_ipAddressAdded(struct nlmsghdr *nlp)
{
struct ifaddrmsg *ifap = (struct ifaddrmsg *)NLMSG_DATA(nlp);
struct rtattr *rtap = (struct rtattr *)IFA_RTA(ifap);
int ifal = IFA_PAYLOAD(nlp);
struct ifaddrmsg *ifap = (struct ifaddrmsg *)NLMSG_DATA(nlp);
struct rtattr *rtap = (struct rtattr *)IFA_RTA(ifap);
int ifal = IFA_PAYLOAD(nlp);
char addr[40] = {0};
char local[40] = {0};
char label[40] = {0};
char bcast[40] = {0};
for(;RTA_OK(rtap, ifal); rtap=RTA_NEXT(rtap,ifal))
{
switch(rtap->rta_type) {
case IFA_ADDRESS:
inet_ntop(ifap->ifa_family, RTA_DATA(rtap), addr, 40);
break;
case IFA_LOCAL:
inet_ntop(ifap->ifa_family, RTA_DATA(rtap), local, 40);
break;
case IFA_LABEL:
memcpy(label, RTA_DATA(rtap), 40);
break;
case IFA_BROADCAST:
inet_ntop(ifap->ifa_family, RTA_DATA(rtap), bcast, 40);
break;
}
}
char addr[40] = {0};
char local[40] = {0};
char label[40] = {0};
char bcast[40] = {0};
for(;RTA_OK(rtap, ifal); rtap=RTA_NEXT(rtap,ifal))
{
switch(rtap->rta_type) {
case IFA_ADDRESS:
inet_ntop(ifap->ifa_family, RTA_DATA(rtap), addr, 40);
break;
case IFA_LOCAL:
inet_ntop(ifap->ifa_family, RTA_DATA(rtap), local, 40);
break;
case IFA_LABEL:
memcpy(label, RTA_DATA(rtap), 40);
break;
case IFA_BROADCAST:
inet_ntop(ifap->ifa_family, RTA_DATA(rtap), bcast, 40);
break;
}
}
fprintf(stderr, "Added IP Address %s local: %s label: %s broadcast: %s\n", addr, local, label, bcast);
fprintf(stderr, "Added IP Address %s local: %s label: %s broadcast: %s\n", addr, local, label, bcast);
}
void LinuxNetLink::_ipAddressDeleted(struct nlmsghdr *nlp)
{
struct ifaddrmsg *ifap = (struct ifaddrmsg *)NLMSG_DATA(nlp);
struct rtattr *rtap = (struct rtattr *)IFA_RTA(ifap);
int ifal = IFA_PAYLOAD(nlp);
struct ifaddrmsg *ifap = (struct ifaddrmsg *)NLMSG_DATA(nlp);
struct rtattr *rtap = (struct rtattr *)IFA_RTA(ifap);
int ifal = IFA_PAYLOAD(nlp);
char addr[40] = {0};
char local[40] = {0};
char label[40] = {0};
char bcast[40] = {0};
for(;RTA_OK(rtap, ifal); rtap=RTA_NEXT(rtap,ifal))
{
switch(rtap->rta_type) {
case IFA_ADDRESS:
inet_ntop(ifap->ifa_family, RTA_DATA(rtap), addr, 40);
break;
case IFA_LOCAL:
inet_ntop(ifap->ifa_family, RTA_DATA(rtap), local, 40);
break;
case IFA_LABEL:
memcpy(label, RTA_DATA(rtap), 40);
break;
case IFA_BROADCAST:
inet_ntop(ifap->ifa_family, RTA_DATA(rtap), bcast, 40);
break;
}
}
char addr[40] = {0};
char local[40] = {0};
char label[40] = {0};
char bcast[40] = {0};
for(;RTA_OK(rtap, ifal); rtap=RTA_NEXT(rtap,ifal))
{
switch(rtap->rta_type) {
case IFA_ADDRESS:
inet_ntop(ifap->ifa_family, RTA_DATA(rtap), addr, 40);
break;
case IFA_LOCAL:
inet_ntop(ifap->ifa_family, RTA_DATA(rtap), local, 40);
break;
case IFA_LABEL:
memcpy(label, RTA_DATA(rtap), 40);
break;
case IFA_BROADCAST:
inet_ntop(ifap->ifa_family, RTA_DATA(rtap), bcast, 40);
break;
}
}
fprintf(stderr, "Removed IP Address %s local: %s label: %s broadcast: %s\n", addr, local, label, bcast);
fprintf(stderr, "Removed IP Address %s local: %s label: %s broadcast: %s\n", addr, local, label, bcast);
}
void LinuxNetLink::_routeAdded(struct nlmsghdr *nlp)
{
char dsts[40] = {0};
char gws[40] = {0};
char ifs[16] = {0};
char ms[24] = {0};
char dsts[40] = {0};
char gws[40] = {0};
char ifs[16] = {0};
char ms[24] = {0};
struct rtmsg *rtp = (struct rtmsg *) NLMSG_DATA(nlp);
struct rtattr *rtap = (struct rtattr *)RTM_RTA(rtp);
int rtl = RTM_PAYLOAD(nlp);
struct rtmsg *rtp = (struct rtmsg *) NLMSG_DATA(nlp);
struct rtattr *rtap = (struct rtattr *)RTM_RTA(rtp);
int rtl = RTM_PAYLOAD(nlp);
for(;RTA_OK(rtap, rtl); rtap=RTA_NEXT(rtap, rtl))
{
switch(rtap->rta_type)
{
case RTA_DST:
inet_ntop(rtp->rtm_family, RTA_DATA(rtap), dsts, 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;
case RTA_OIF:
sprintf(ifs, "%d", *((int*)RTA_DATA(rtap)));
break;
}
}
sprintf(ms, "%d", rtp->rtm_dst_len);
for(;RTA_OK(rtap, rtl); rtap=RTA_NEXT(rtap, rtl))
{
switch(rtap->rta_type)
{
case RTA_DST:
inet_ntop(rtp->rtm_family, RTA_DATA(rtap), dsts, 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;
case RTA_OIF:
sprintf(ifs, "%d", *((int*)RTA_DATA(rtap)));
break;
}
}
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 if %s\n", dsts, ms, gws, ifs);
}
void LinuxNetLink::_routeDeleted(struct nlmsghdr *nlp)
{
char dsts[40] = {0};
char gws[40] = {0};
char ifs[16] = {0};
char ms[24] = {0};
char dsts[40] = {0};
char gws[40] = {0};
char ifs[16] = {0};
char ms[24] = {0};
struct rtmsg *rtp = (struct rtmsg *) NLMSG_DATA(nlp);
struct rtattr *rtap = (struct rtattr *)RTM_RTA(rtp);
int rtl = RTM_PAYLOAD(nlp);
struct rtmsg *rtp = (struct rtmsg *) NLMSG_DATA(nlp);
struct rtattr *rtap = (struct rtattr *)RTM_RTA(rtp);
int rtl = RTM_PAYLOAD(nlp);
for(;RTA_OK(rtap, rtl); rtap=RTA_NEXT(rtap, rtl))
{
switch(rtap->rta_type)
{
case RTA_DST:
inet_ntop(rtp->rtm_family, RTA_DATA(rtap), dsts, 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;
case RTA_OIF:
sprintf(ifs, "%d", *((int*)RTA_DATA(rtap)));
break;
}
}
sprintf(ms, "%d", rtp->rtm_dst_len);
for(;RTA_OK(rtap, rtl); rtap=RTA_NEXT(rtap, rtl))
{
switch(rtap->rta_type)
{
case RTA_DST:
inet_ntop(rtp->rtm_family, RTA_DATA(rtap), dsts, 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;
case RTA_OIF:
sprintf(ifs, "%d", *((int*)RTA_DATA(rtap)));
break;
}
}
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 if %s\n", dsts, ms, gws, ifs);
}
void LinuxNetLink::_linkAdded(struct nlmsghdr *nlp)
{
char mac[20] = {0};
unsigned int mtu = 0;
char ifname[40] = {0};
char mac[18] = {0};
unsigned int mtu = 0;
char ifname[IFNAMSIZ] = {0};
struct ifinfomsg *ifip = (struct ifinfomsg *)NLMSG_DATA(nlp);
struct rtattr *rtap = (struct rtattr *)IFLA_RTA(ifip);
int ifil = RTM_PAYLOAD(nlp);
struct ifinfomsg *ifip = (struct ifinfomsg *)NLMSG_DATA(nlp);
struct rtattr *rtap = (struct rtattr *)IFLA_RTA(ifip);
int ifil = RTM_PAYLOAD(nlp);
const char *ptr;
unsigned char *ptr2;
for(;RTA_OK(rtap, ifil);rtap=RTA_NEXT(rtap, ifil))
{
switch(rtap->rta_type) {
case IFLA_ADDRESS:
ptr2 = (unsigned char*)RTA_DATA(rtap);
snprintf(mac, 20, "%02x:%02x:%02x:%02x:%02x:%02x",
ptr2[0], ptr2[1], ptr2[2], ptr2[3], ptr2[4], ptr2[5]);
break;
case IFLA_IFNAME:
ptr = (const char*)RTA_DATA(rtap);
memcpy(ifname, ptr, strlen(ptr));
break;
case IFLA_MTU:
memcpy(&mtu, RTA_DATA(rtap), sizeof(unsigned int));
break;
}
}
const char *ptr;
unsigned char *ptr2;
for(;RTA_OK(rtap, ifil);rtap=RTA_NEXT(rtap, ifil))
{
switch(rtap->rta_type) {
case IFLA_ADDRESS:
ptr2 = (unsigned char*)RTA_DATA(rtap);
snprintf(mac, 20, "%02x:%02x:%02x:%02x:%02x:%02x",
ptr2[0], ptr2[1], ptr2[2], ptr2[3], ptr2[4], ptr2[5]);
break;
case IFLA_IFNAME:
ptr = (const char*)RTA_DATA(rtap);
memcpy(ifname, ptr, strlen(ptr));
break;
case IFLA_MTU:
memcpy(&mtu, RTA_DATA(rtap), sizeof(unsigned int));
break;
}
}
fprintf(stderr, "Link Added: %s mac: %s, mtu: %d\n", ifname, mac, mtu);
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));
entry.mtu = mtu;
fprintf(stderr, "Link Added: %s mac: %s, mtu: %d\n", ifname, mac, mtu);
}
void LinuxNetLink::_linkDeleted(struct nlmsghdr *nlp)
{
char mac[20] = {0};
unsigned int mtu = 0;
char ifname[40] = {0};
char mac[18] = {0};
unsigned int mtu = 0;
char ifname[40] = {0};
struct ifinfomsg *ifip = (struct ifinfomsg *)NLMSG_DATA(nlp);
struct rtattr *rtap = (struct rtattr *)IFLA_RTA(ifip);
int ifil = RTM_PAYLOAD(nlp);
struct ifinfomsg *ifip = (struct ifinfomsg *)NLMSG_DATA(nlp);
struct rtattr *rtap = (struct rtattr *)IFLA_RTA(ifip);
int ifil = RTM_PAYLOAD(nlp);
const char *ptr;
unsigned char *ptr2;
for(;RTA_OK(rtap, ifil);rtap=RTA_NEXT(rtap, ifil))
{
switch(rtap->rta_type) {
case IFLA_ADDRESS:
ptr2 = (unsigned char*)RTA_DATA(rtap);
snprintf(mac, 20, "%02x:%02x:%02x:%02x:%02x:%02x",
ptr2[0], ptr2[1], ptr2[2], ptr2[3], ptr2[4], ptr2[5]);
break;
case IFLA_IFNAME:
ptr = (const char*)RTA_DATA(rtap);
memcpy(ifname, ptr, strlen(ptr));
break;
case IFLA_MTU:
memcpy(&mtu, RTA_DATA(rtap), sizeof(unsigned int));
break;
}
}
const char *ptr;
unsigned char *ptr2;
for(;RTA_OK(rtap, ifil);rtap=RTA_NEXT(rtap, ifil))
{
switch(rtap->rta_type) {
case IFLA_ADDRESS:
ptr2 = (unsigned char*)RTA_DATA(rtap);
snprintf(mac, 20, "%02x:%02x:%02x:%02x:%02x:%02x",
ptr2[0], ptr2[1], ptr2[2], ptr2[3], ptr2[4], ptr2[5]);
break;
case IFLA_IFNAME:
ptr = (const char*)RTA_DATA(rtap);
memcpy(ifname, ptr, strlen(ptr));
break;
case IFLA_MTU:
memcpy(&mtu, RTA_DATA(rtap), sizeof(unsigned int));
break;
}
}
fprintf(stderr, "Link Deleted: %s mac: %s, mtu: %d\n", ifname, mac, mtu);
fprintf(stderr, "Link Deleted: %s mac: %s, mtu: %d\n", ifname, mac, mtu);
if(_interfaces.contains(ifip->ifi_index)) {
_interfaces.erase(ifip->ifi_index);
}
}
void LinuxNetLink::_requestIPv4Routes()
{
struct nl_req req;
bzero(&req, sizeof(req));
req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
req.nl.nlmsg_type = RTM_GETROUTE;
req.nl.nlmsg_pid = 0;
req.nl.nlmsg_seq = ++_seq;
req.rt.rtm_family = AF_INET;
req.rt.rtm_table = RT_TABLE_MAIN;
struct nl_route_req req;
bzero(&req, sizeof(req));
req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
req.nl.nlmsg_type = RTM_GETROUTE;
req.nl.nlmsg_pid = 0;
req.nl.nlmsg_seq = ++_seq;
req.rt.rtm_family = AF_INET;
req.rt.rtm_table = RT_TABLE_MAIN;
struct sockaddr_nl pa;
bzero(&pa, sizeof(pa));
pa.nl_family = AF_NETLINK;
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 msghdr msg;
bzero(&msg, sizeof(msg));
msg.msg_name = (void*)&pa;
msg.msg_namelen = sizeof(pa);
struct iovec iov;
bzero(&iov, sizeof(iov));
iov.iov_base = (void*)&req.nl;
iov.iov_len = req.nl.nlmsg_len;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
struct iovec iov;
bzero(&iov, sizeof(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);
sendmsg(_fd, &msg, 0);
}
void LinuxNetLink::_requestIPv6Routes()
{
struct nl_req req;
bzero(&req, sizeof(req));
req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
req.nl.nlmsg_type = RTM_GETROUTE;
req.nl.nlmsg_pid = 0;
req.nl.nlmsg_seq = ++_seq;
req.rt.rtm_family = AF_INET6;
req.rt.rtm_table = RT_TABLE_MAIN;
struct nl_route_req req;
bzero(&req, sizeof(req));
req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
req.nl.nlmsg_type = RTM_GETROUTE;
req.nl.nlmsg_pid = 0;
req.nl.nlmsg_seq = ++_seq;
req.rt.rtm_family = AF_INET6;
req.rt.rtm_table = RT_TABLE_MAIN;
struct sockaddr_nl pa;
bzero(&pa, sizeof(pa));
pa.nl_family = AF_NETLINK;
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 msghdr msg;
bzero(&msg, sizeof(msg));
msg.msg_name = (void*)&pa;
msg.msg_namelen = sizeof(pa);
struct iovec iov;
bzero(&iov, sizeof(iov));
iov.iov_base = (void*)&req.nl;
iov.iov_len = req.nl.nlmsg_len;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
struct iovec iov;
bzero(&iov, sizeof(iov));
iov.iov_base = (void*)&req.nl;
iov.iov_len = req.nl.nlmsg_len;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
while((sendmsg(_fd, &msg, 0)) == -1) {
fprintf(stderr, "ipv6 waiting...");
Thread::sleep(100);
}
sendmsg(_fd, &msg, 0);
}
void LinuxNetLink::_requestInterfaceList()
{
struct nl_if_req req;
bzero(&req, sizeof(req));
req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
req.nl.nlmsg_type = RTM_GETLINK;
req.nl.nlmsg_pid = 0;
req.nl.nlmsg_seq = ++_seq;
req.ifa.ifi_family = AF_UNSPEC;
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;
bzero(&iov, sizeof(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::addRoute(const InetAddress &target, const InetAddress &via, const char *ifaceName)
{
int rtl = sizeof(struct rtmsg);
struct nl_route_req req;
bzero(&req, sizeof(req));
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));
} 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));
}
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));
} 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));
}
rtl += rtap->rta_len;
}
req.nl.nlmsg_len = NLMSG_LENGTH(rtl);
req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE;
req.nl.nlmsg_type = RTM_NEWROUTE;
req.nl.nlmsg_pid = 0;
req.nl.nlmsg_seq = ++_seq;
req.rt.rtm_family = target.ss_family;
req.rt.rtm_table = RT_TABLE_MAIN;
req.rt.rtm_protocol = RTPROT_STATIC;
req.rt.rtm_scope = RT_SCOPE_UNIVERSE;
req.rt.rtm_type = RTN_UNICAST;
req.rt.rtm_dst_len = target.netmaskBits();
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;
bzero(&iov, sizeof(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::delRoute(const InetAddress &target, const InetAddress &via, const char *ifaceName)
{
int rtl = sizeof(struct rtmsg);
struct nl_route_req req;
bzero(&req, sizeof(req));
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));
} 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));
}
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));
} 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));
}
rtl += rtap->rta_len;
}
req.nl.nlmsg_len = NLMSG_LENGTH(rtl);
req.nl.nlmsg_flags = NLM_F_REQUEST;
req.nl.nlmsg_type = RTM_DELROUTE;
req.nl.nlmsg_pid = 0;
req.nl.nlmsg_seq = ++_seq;
req.rt.rtm_family = target.ss_family;
req.rt.rtm_table = RT_TABLE_MAIN;
req.rt.rtm_protocol = RTPROT_STATIC;
req.rt.rtm_scope = RT_SCOPE_UNIVERSE;
req.rt.rtm_type = RTN_UNICAST;
req.rt.rtm_dst_len = target.netmaskBits();
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;
bzero(&iov, sizeof(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::addInterface(const char *iface, unsigned int mtu)
@ -446,12 +646,12 @@ void LinuxNetLink::addAddress(const InetAddress &addr, const char *iface)
RouteList LinuxNetLink::getIPV4Routes() const
{
return _routes_ipv4;
return _routes_ipv4;
}
RouteList LinuxNetLink::getIPV6Routes() const
{
return _routes_ipv6;
return _routes_ipv6;
}
} // namespace ZeroTier

28
osdep/LinuxNetLink.hpp
View File

@ -33,28 +33,23 @@
#include <asm/types.h>
#include <linux/rtnetlink.h>
#include <sys/socket.h>
#include <linux/if.h>
#include "../node/InetAddress.hpp"
#include "Thread.hpp"
#include "../node/Hashtable.hpp"
namespace ZeroTier {
struct route_entry {
InetAddress target;
InetAddress via;
const char *iface;
InetAddress target;
InetAddress via;
int if_index;
char iface[IFNAMSIZ];
};
typedef std::vector<route_entry> RouteList;
struct nl_req {
struct nlmsghdr nl;
struct rtmsg rt;
char buf[8192];
};
/**
* Interface with Linux's RTNETLINK
*/
@ -93,18 +88,27 @@ private:
void _ipAddressAdded(struct nlmsghdr *nlp);
void _ipAddressDeleted(struct nlmsghdr *nlp);
void _requestInterfaceList();
void _requestIPv4Routes();
void _requestIPv6Routes();
Thread _t;
bool _running;
RouteList _routes_ipv4;
RouteList _routes_ipv6;
uint32_t _seq;
struct iface_entry {
int index;
char ifacename[IFNAMSIZ];
char mac[18];
unsigned int mtu;
};
Hashtable<int, iface_entry> _interfaces;
// socket communication vars;
int _fd;
struct sockaddr_nl _la;

41
osdep/ManagedRoute.cpp
View File

@ -54,6 +54,7 @@
#include <asm/types.h>
#include <linux/rtnetlink.h>
#include <sys/socket.h>
#include "../osdep/LinuxNetLink.hpp"
#endif
#ifdef __BSD__
#include <net/if_dl.h>
@ -284,44 +285,14 @@ static void _routeCmd(const char *op,const InetAddress &target,const InetAddress
#ifdef __LINUX__ // ----------------------------------------------------------
#define ZT_ROUTING_SUPPORT_FOUND 1
static bool _hasRoute(const InetAddress &target, const InetAddress &via, const char *localInterface)
{
if (target.ss_family == AF_INET) {
int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
char *buf;
int nll;
struct rtmsg *rtp;
int rtl;
struct rtattr *rtap;
struct sockaddr_nl la;
bzero(&la, sizeof(la));
la.nl_family = AF_NETLINK;
la.nl_pad = 0;
la.nl_pid = (uint32_t)((ptrdiff_t)&target % getpid());
la.nl_groups = 0;
int rtn = bind(fd, (struct sockaddr*)&la, sizeof(la));
close(fd);
return false;
} else {
return false;
}
}
static void _routeCmd(const char *op, const InetAddress &target, const InetAddress &via, const char *localInterface)
{
bool hasRoute = _hasRoute(target, via, localInterface);
if (hasRoute && (strcmp(op, "add") == 0 || strcmp(op, "replace") == 0)) {
return;
} else if (!hasRoute && (strcmp(op, "remove") == 0 || strcmp(op, "del") == 0)) {
return;
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};