shared_ptr<Interface> ThriftConfigApplier::updateInterface(
const shared_ptr<Interface>& orig,
const cfg::Interface* config,
const Interface::Addresses& addrs) {
CHECK_EQ(orig->getID(), config->intfID);
cfg::NdpConfig ndp;
if (config->__isset.ndp) {
ndp = config->ndp;
}
auto name = getInterfaceName(config);
auto mac = getInterfaceMac(config);
auto mtu = config->__isset.mtu ? config->mtu : Interface::kDefaultMtu;
if (orig->getRouterID() == RouterID(config->routerID) &&
orig->getVlanID() == VlanID(config->vlanID) &&
orig->getName() == name &&
orig->getMac() == mac &&
orig->getAddresses() == addrs &&
orig->getNdpConfig() == ndp &&
orig->getMtu() == mtu) {
// No change
return nullptr;
}
auto newIntf = orig->clone();
newIntf->setRouterID(RouterID(config->routerID));
newIntf->setVlanID(VlanID(config->vlanID));
newIntf->setName(name);
newIntf->setMac(mac);
newIntf->setAddresses(addrs);
newIntf->setNdpConfig(ndp);
newIntf->setMtu(mtu);
return newIntf;
}
shared_ptr<Interface> ThriftConfigApplier::createInterface(
const cfg::Interface* config,
const Interface::Addresses& addrs) {
auto name = getInterfaceName(config);
auto mac = getInterfaceMac(config);
auto mtu = config->__isset.mtu ? config->mtu : Interface::kDefaultMtu;
auto intf = make_shared<Interface>(InterfaceID(config->intfID),
RouterID(config->routerID),
VlanID(config->vlanID),
name,
mac,
mtu);
intf->setAddresses(addrs);
if (config->__isset.ndp) {
intf->setNdpConfig(config->ndp);
}
return intf;
}
int getSenderInterface(unsigned int targetIP, char* device, char* mac)
{
struct nlmsghdr* nlMsg;
char msgBuf[BUFSIZE];
int sock;
ssize_t len = 0;
uint32_t msgSeq = 0;
if ((sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE)) < 0)
{
syslog(LOG_ERR, "unable to create socket: '%s'", strerror(errno));
return -1;
}
memset(msgBuf, 0, BUFSIZE);
nlMsg = (struct nlmsghdr *)msgBuf;
nlMsg->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
nlMsg->nlmsg_type = RTM_GETROUTE;
nlMsg->nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST;
nlMsg->nlmsg_seq = msgSeq++;
nlMsg->nlmsg_pid = getpid();
if (send(sock, nlMsg, nlMsg->nlmsg_len, 0) < 0)
{
syslog(LOG_ERR, "unable to write to socket: '%s'", strerror(errno));
close(sock);
return -1;
}
if ((len = readNlSock(sock, msgBuf, msgSeq, getpid())) < 0)
{
syslog(LOG_ERR, "unable to read from socket: '%s'", strerror(errno));
close(sock);
return -1;
}
for (; nlmsg_ok(nlMsg, len); nlMsg = NLMSG_NEXT(nlMsg, len)) {
struct rtmsg* rtMsg = (struct rtmsg *)NLMSG_DATA(nlMsg);
if (rtMsg->rtm_family == AF_INET || rtMsg->rtm_table == RT_TABLE_MAIN)
{
struct rtattr* rtAttr = (struct rtattr *)RTM_RTA(rtMsg);
int rtLen = RTM_PAYLOAD(nlMsg);
char ifName[IF_NAMESIZE] = {0};
unsigned int dstAddr = 0, dstMask = 1;
for (; RTA_OK(rtAttr, rtLen); rtAttr = RTA_NEXT(rtAttr, rtLen)) {
switch (rtAttr->rta_type)
{
case RTA_OIF:
if_indextoname(*(int *)RTA_DATA(rtAttr), ifName);
break;
case RTA_DST:
dstAddr = *(u_int *)RTA_DATA(rtAttr);
dstMask = rtLen;
break;
}
}
if (dstMask <= 32)
{
dstMask = htonl(ntohl(inet_addr("255.255.255.255")) << (32 - dstMask));
if ((dstAddr & dstMask) == (targetIP & dstMask))
{
if (getInterfaceMac(ifName, mac) == 0)
{
close(sock);
snprintf(device, IFNAMSIZ, "%s", ifName);
syslog(LOG_INFO, "sending from device '%s' with MAC address '%s'",
device,
printMACStr(mac));
return 0;
}
}
}
}
}
close(sock);
return 1;
}
