int TunManager::getLinkRespParser(const struct sockaddr_nl *who,
struct nlmsghdr *n,
void *arg) {
// only cares about RTM_NEWLINK
if (n->nlmsg_type != RTM_NEWLINK) {
return 0;
}
struct ifinfomsg *ifi = static_cast<struct ifinfomsg *>(NLMSG_DATA(n));
struct rtattr *tb[IFLA_MAX + 1];
int len = n->nlmsg_len;
len -= NLMSG_LENGTH(sizeof(*ifi));
if (len < 0) {
throw FbossError("Wrong length for RTM_GETLINK response ", len, " vs ",
NLMSG_LENGTH(sizeof(*ifi)));
}
parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
if (tb[IFLA_IFNAME] == nullptr) {
throw FbossError("Device @ index ", static_cast<int>(ifi->ifi_index),
" does not have a nmae");
}
const auto name = rta_getattr_str(tb[IFLA_IFNAME]);
// match the interface name against intfPrefix
if (!TunIntf::isTunIntf(name)) {
VLOG(3) << "Ignore interface " << name
<< " because it is not a tun interface";
return 0;
}
// base on the name, get the router ID
auto rid = TunIntf::getRidFromName(name);
TunManager *mgr = static_cast<TunManager *>(arg);
mgr->addIntf(rid, std::string(name), ifi->ifi_index);
return 0;
}
BcmPortGroup::BcmPortGroup(BcmSwitch* hw,
BcmPort* controllingPort,
std::vector<BcmPort*> allPorts)
: hw_(hw),
controllingPort_(controllingPort),
allPorts_(std::move(allPorts)) {
if (allPorts_.size() != 4) {
throw FbossError("Port groups must have exactly four members");
}
for (int i = 0; i < allPorts_.size(); ++i) {
if (getLane(allPorts_[i]) != i) {
throw FbossError("Ports passed in are not ordered by lane");
}
}
// get the number of active lanes
auto activeLanes = retrieveActiveLanes();
switch (activeLanes) {
case 1:
laneMode_ = LaneMode::QUAD;
break;
case 2:
laneMode_ = LaneMode::DUAL;
break;
case 4:
laneMode_ = LaneMode::SINGLE;
break;
default:
throw FbossError("Unexpected number of lanes retrieved for bcm port ",
controllingPort_->getBcmPortId());
}
}
const uint8_t* QsfpModule::getQsfpValuePtr(int dataAddress, int offset,
int length) const {
/* if the cached values are not correct */
if (!cacheIsValid()) {
throw FbossError("Qsfp is either not present or the data is not read");
}
if (dataAddress == QsfpPages::LOWER) {
CHECK_LE(offset + length, sizeof(qsfpIdprom_));
/* Copy data from the cache */
return(qsfpIdprom_ + offset);
} else {
offset -= MAX_QSFP_PAGE_SIZE;
CHECK_GE(offset, 0);
CHECK_LE(offset, MAX_QSFP_PAGE_SIZE);
if (dataAddress == QsfpPages::PAGE0) {
CHECK_LE(offset + length, sizeof(qsfpPage0_));
/* Copy data from the cache */
return(qsfpPage0_ + offset);
} else if (dataAddress == QsfpPages::PAGE3 && !flatMem_) {
CHECK_LE(offset + length, sizeof(qsfpPage3_));
/* Copy data from the cache */
return(qsfpPage3_ + offset);
} else {
throw FbossError("Invalid Data Address 0x%d", dataAddress);
}
}
}
bool ThriftConfigApplier::updateDhcpOverrides(Vlan* vlan,
const cfg::Vlan* config) {
DhcpV4OverrideMap newDhcpV4OverrideMap;
for (const auto& pair : config->dhcpRelayOverridesV4) {
try {
newDhcpV4OverrideMap[MacAddress(pair.first)] = IPAddressV4(pair.second);
} catch (const IPAddressFormatException& ex) {
throw FbossError("Invalid IPv4 address in DHCPv4 relay override map: ",
ex.what());
}
}
DhcpV6OverrideMap newDhcpV6OverrideMap;
for (const auto& pair : config->dhcpRelayOverridesV6) {
try {
newDhcpV6OverrideMap[MacAddress(pair.first)] = IPAddressV6(pair.second);
} catch (const IPAddressFormatException& ex) {
throw FbossError("Invalid IPv4 address in DHCPv4 relay override map: ",
ex.what());
}
}
bool changed = false;
auto oldDhcpV4OverrideMap = vlan->getDhcpV4RelayOverrides();
if (oldDhcpV4OverrideMap != newDhcpV4OverrideMap) {
vlan->setDhcpV4RelayOverrides(newDhcpV4OverrideMap);
changed = true;
}
auto oldDhcpV6OverrideMap = vlan->getDhcpV6RelayOverrides();
if (oldDhcpV6OverrideMap != newDhcpV6OverrideMap) {
vlan->setDhcpV6RelayOverrides(newDhcpV6OverrideMap);
changed = true;
}
return changed;
}
Interface::Addresses ThriftConfigApplier::getInterfaceAddresses(
const cfg::Interface* config) {
Interface::Addresses addrs;
for (const auto& addr : config->ipAddresses) {
auto intfAddr = IPAddress::createNetwork(addr, -1, false);
auto ret = addrs.insert(intfAddr);
if (!ret.second) {
throw FbossError("Duplicate network IP address ", addr,
" in interface ", config->intfID);
}
auto ret2 = intfRouteTables_[RouterID(config->routerID)].emplace(
IPAddress::createNetwork(addr),
std::make_pair(InterfaceID(config->intfID), intfAddr.first));
if (!ret2.second) {
// we get same network, only allow it if that is from the same interface
auto other = ret2.first->second.first;
if (other != InterfaceID(config->intfID)) {
throw FbossError("Duplicate network address ", addr, " of interface ",
config->intfID, " as interface ", other,
" in VRF ", config->routerID);
}
}
}
return addrs;
}
BcmPortGroup::LaneMode BcmPortGroup::calculateDesiredLaneMode(
const std::vector<Port*>& ports, LaneSpeeds laneSpeeds) {
auto desiredMode = LaneMode::QUAD;
for (int lane = 0; lane < ports.size(); ++lane) {
auto port = ports[lane];
if (!port->isDisabled()) {
auto neededMode = neededLaneModeForSpeed(port->getSpeed(), laneSpeeds);
if (neededMode < desiredMode) {
desiredMode = neededMode;
}
// Check that the lane is expected for SINGLE/DUAL modes
if (desiredMode == LaneMode::SINGLE) {
if (lane != 0) {
throw FbossError("Only lane 0 can be enabled in SINGLE mode");
}
} else if (desiredMode == LaneMode::DUAL) {
if (lane != 0 && lane != 2) {
throw FbossError("Only lanes 0 or 2 can be enabled in DUAL mode");
}
}
VLOG(3) << "Port " << port->getID() << " enabled with speed " <<
static_cast<int>(port->getSpeed());
}
}
return desiredMode;
}
std::string RestClient::requestWithOutput(std::string path) {
CURL* curl;
CURLcode resp;
std::stringbuf write_buffer;
endpoint_ = endpoint_ + path;
/* for curl errors */
char error[CURL_ERROR_SIZE];
curl = curl_easy_init();
if (curl) {
/* Set the curl options */
curl_easy_setopt(curl, CURLOPT_URL, endpoint_.c_str());
curl_easy_setopt(curl, CURLOPT_PROTOCOLS,CURLPROTO_HTTP);
curl_easy_setopt(curl, CURLOPT_PORT, port_);
curl_easy_setopt(curl, CURLOPT_TIMEOUT_MS, timeout_.count());
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, RestClient::writer);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &write_buffer);
curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, error);
curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L);
/* if an interface is specified use that */
if (!interface_.empty()) {
curl_easy_setopt(curl, CURLOPT_INTERFACE, interface_.c_str());
}
resp = curl_easy_perform(curl);
curl_easy_cleanup(curl);
if (resp == CURLE_OK) {
return write_buffer.str();
} else {
throw FbossError("Error querying api: ", endpoint_, " error: ", error);
}
}
throw FbossError("Error initializing curl interface");
}
std::unique_ptr<BcmUnit> BcmAPI::initOnlyUnit() {
auto numDevices = BcmAPI::getNumSwitches();
if (numDevices == 0) {
throw FbossError("no Broadcom switching ASIC found");
} else if (numDevices > 1) {
throw FbossError("found more than 1 Broadcom switching ASIC");
}
return initUnit(0);
}
BcmUnit* BcmAPI::getUnit(int unit) {
if (unit < 0 || unit > getMaxSwitches()) {
throw FbossError("invalid BCM unit number ", unit);
}
BcmUnit* unitObj = bcmUnits[unit].load(std::memory_order_acquire);
if (!unitObj) {
throw FbossError("no BcmUnit created for unit number ", unit);
}
return unitObj;
}
void IPHeaderV4::parse(SwSwitch *sw, PortID port, Cursor* cursor) {
auto len = cursor->pullAtMost(&hdr_[0], sizeof(hdr_));
if (len != sizeof(hdr_)) {
sw->stats()->port(port)->ipv4TooSmall();
throw FbossError("Too small packet. Get ", cursor->length(),
" bytes. Minimum ", sizeof(hdr_), " bytes");
}
if (getVersion() != 4) {
sw->stats()->port(port)->ipv4WrongVer();
throw FbossError("Wrong IPv4 version number (", getVersion(), " vs 4)");
}
// TODO: other sanity checks (i.e. packet length, checksum...)
}
WedgePort* WedgePlatform::getPort(PortID id) {
auto iter = ports_.find(id);
if (iter == ports_.end()) {
throw FbossError("Cannot find the Wedge port object for BCM port ", id);
}
return iter->second.get();
}
shared_ptr<NdpCache> NeighborUpdater::getNdpCacheInternal(VlanID vlan) {
auto res = caches_.find(vlan);
if (res == caches_.end()) {
throw FbossError("Tried to get Ndp cache non-existent vlan ", vlan);
}
return res->second->ndpCache;
}
bool updateMap(NodeMap* map, std::shared_ptr<Node> origNode,
std::shared_ptr<Node> newNode) {
if (newNode) {
auto ret = map->insert(std::make_pair(newNode->getID(), newNode));
if (!ret.second) {
throw FbossError("duplicate entry ", newNode->getID());
}
return true;
} else {
auto ret = map->insert(std::make_pair(origNode->getID(), origNode));
if (!ret.second) {
throw FbossError("duplicate entry ", origNode->getID());
}
return false;
}
}
void TunManager::addIntf(RouterID rid, const Interface::Addresses& addrs) {
auto ret = intfs_.emplace(rid, nullptr);
if (!ret.second) {
throw FbossError("Duplicate interface for router ", rid);
}
SCOPE_FAIL {
intfs_.erase(ret.first);
};
auto intf = folly::make_unique<TunIntf>(
sw_, evb_, rid, addrs, getMinMtu(sw_->getState()));
SCOPE_FAIL {
intf->setDelete();
};
const auto& name = intf->getName();
auto index = intf->getIfIndex();
// bring up the interface so that we can add the default route next step
bringupIntf(name, index);
// create a new route table for this rid
addRouteTable(index, rid);
// add all addresses
for (const auto& addr : addrs) {
addTunAddress(name, rid, index, addr.first, addr.second);
}
ret.first->second = std::move(intf);
}
BcmIntf* BcmIntfTable::getBcmIntf(InterfaceID id) const {
auto ptr = getBcmIntfIf(id);
if (ptr == nullptr) {
throw FbossError("Cannot find interface ", id);
}
return ptr;
}
BcmAclRange* FOLLY_NULLABLE BcmAclTable::derefBcmAclRange(
const AclRange& range) {
auto iter = aclRangeMap_.find(range);
if (iter == aclRangeMap_.end()) {
throw FbossError("decrease reference count on a non-existing BcmAclRange");
}
if (iter->second.second == 0) {
throw FbossError("dereference a BcmAclRange whose reference is 0");
}
iter->second.second--;
if (iter->second.second == 0) {
aclRangeMap_.erase(iter);
return nullptr;
}
return iter->second.first.get();
}
void ThriftConfigApplier::updateVlanInterfaces(const Interface* intf) {
auto& entry = vlanInterfaces_[intf->getVlanID()];
// Each VLAN can only be used with a single virtual router
if (entry.interfaces.empty()) {
entry.routerID = intf->getRouterID();
} else {
if (intf->getRouterID() != entry.routerID) {
throw FbossError("VLAN ", intf->getVlanID(), " configured in multiple "
"different virtual routers: ", entry.routerID, " and ",
intf->getRouterID());
}
}
auto intfRet = entry.interfaces.insert(intf->getID());
if (!intfRet.second) {
// This shouldn't happen
throw FbossError("interface ", intf->getID(), " processed twice for "
"VLAN ", intf->getVlanID());
}
for (const auto& ipMask : intf->getAddresses()) {
VlanIpInfo info(ipMask.second, intf->getMac(), intf->getID());
auto ret = entry.addresses.emplace(ipMask.first, info);
if (ret.second) {
continue;
}
// Allow multiple interfaces on the same VLAN with the same IP,
// as long as they also share the same mask and MAC address.
const auto& oldInfo = ret.first->second;
if (oldInfo.mask != info.mask) {
throw FbossError("VLAN ", intf->getVlanID(), " has IP ", ipMask.first,
" configured multiple times with different masks (",
oldInfo.mask, " and ", info.mask, ")");
}
if (oldInfo.mac != info.mac) {
throw FbossError("VLAN ", intf->getVlanID(), " has IP ", ipMask.first,
" configured multiple times with different MACs (",
oldInfo.mac, " and ", info.mac, ")");
}
}
// Also add the link-local IPv6 address
IPAddressV6 linkLocalAddr(IPAddressV6::LINK_LOCAL, intf->getMac());
VlanIpInfo linkLocalInfo(64, intf->getMac(), intf->getID());
entry.addresses.emplace(IPAddress(linkLocalAddr), linkLocalInfo);
}
InterfaceMap::Interfaces
InterfaceMap::getInterfacesInVlan(VlanID vlan) const {
auto interfaces = getInterfacesInVlanIf(vlan);
if (interfaces.empty()) {
throw FbossError("No interface in vlan : ", vlan);
}
return interfaces;
}
BcmRoute* BcmRouteTable::getBcmRoute(
opennsl_vrf_t vrf, const folly::IPAddress& network, uint8_t mask) const {
auto rt = getBcmRouteIf(vrf, network, mask);
if (!rt) {
throw FbossError("Cannot find route for ", network,
"/", static_cast<uint32_t>(mask), " @ vrf ", vrf);
}
return rt;
}
const std::shared_ptr<Interface>&
InterfaceMap::getInterface(RouterID router, const IPAddress& ip) const {
for (auto itr = begin(); itr != end(); ++itr) {
if ((*itr)->getRouterID() == router && (*itr)->hasAddress(ip)) {
return *itr;
}
}
throw FbossError("No interface with ip : ", ip);
}
AclEntryFields AclEntryFields::fromFollyDynamic(
const folly::dynamic& aclEntryJson) {
AclEntryFields aclEntry(AclEntryID(aclEntryJson[kId].asInt()));
if (aclEntryJson.find(kSrcIp) != aclEntryJson.items().end()) {
aclEntry.srcIp = IPAddress::createNetwork(
aclEntryJson[kSrcIp].asString());
}
if (aclEntryJson.find(kDstIp) != aclEntryJson.items().end()) {
aclEntry.dstIp = IPAddress::createNetwork(
aclEntryJson[kDstIp].asString());
}
if (aclEntry.srcIp.first && aclEntry.dstIp.first &&
aclEntry.srcIp.first.isV4() != aclEntry.dstIp.first.isV4()) {
throw FbossError(
"Unmatched ACL IP versions ",
aclEntryJson[kSrcIp].asString(),
" vs ",
aclEntryJson[kDstIp].asString()
);
}
if (aclEntryJson.find(kL4SrcPort) != aclEntryJson.items().end()) {
aclEntry.l4SrcPort = aclEntryJson[kL4SrcPort].asInt();
}
if (aclEntryJson.find(kL4DstPort) != aclEntryJson.items().end()) {
aclEntry.l4DstPort = aclEntryJson[kL4DstPort].asInt();
}
if (aclEntryJson.find(kProto) != aclEntryJson.items().end()) {
aclEntry.proto = aclEntryJson[kProto].asInt();
}
if (aclEntryJson.find(kTcpFlags) != aclEntryJson.items().end()) {
aclEntry.tcpFlags = aclEntryJson[kTcpFlags].asInt();
}
if (aclEntryJson.find(kTcpFlagsMask) != aclEntryJson.items().end()) {
aclEntry.tcpFlagsMask = aclEntryJson[kTcpFlagsMask].asInt();
}
auto itr_action = cfg::_AclAction_NAMES_TO_VALUES.find(
aclEntryJson[kAction].asString().c_str());
if (itr_action == cfg::_AclAction_NAMES_TO_VALUES.end()) {
throw FbossError(
"Unsupported ACL action ", aclEntryJson[kAction].asString());
}
aclEntry.action = cfg::AclAction(itr_action->second);
return aclEntry;
}
void PktCaptureManager::checkCaptureName(folly::StringPiece name) {
// We use the capture name for the on-disk filename, so don't allow
// directory separator characters or nul bytes.
std::string invalidChars("\0/", 2);
size_t idx = name.find_first_of(invalidChars);
if (idx != std::string::npos) {
throw FbossError("invalid capture name \"", name,
"\": invalid character at byte ", idx);
}
}
void BcmIntfTable::deleteIntf(const std::shared_ptr<Interface>& intf) {
auto iter = intfs_.find(intf->getID());
if (iter == intfs_.end()) {
throw FbossError("Failed to delete a non-existing interface ",
intf->getID());
}
auto bcmIfId = iter->second->getBcmIfId();
intfs_.erase(iter);
bcmIntfs_.erase(bcmIfId);
}
std::unique_ptr<BcmUnit> BcmAPI::initUnit(int deviceIndex) {
auto unitObj = make_unique<BcmUnit>(deviceIndex);
int unit = unitObj->getNumber();
BcmUnit* expectedUnit{nullptr};
if (!bcmUnits[unit].compare_exchange_strong(expectedUnit, unitObj.get(),
std::memory_order_acq_rel)) {
throw FbossError("a BcmUnit already exists for unit number ", unit);
}
return std::move(unitObj);
}
std::pair<ClientID, const RouteNextHopEntry *>
RouteNextHopsMulti::getBestEntry() const {
auto entry = getEntryForClient(lowestAdminDistanceClientId_);
if (entry) {
return std::make_pair(lowestAdminDistanceClientId_, entry);
} else {
// Throw an exception if the map is empty. Shall not happen
throw FbossError("Unexpected empty RouteNextHopsMulti");
}
}
void TunManager::removeIntf(RouterID rid) {
auto iter = intfs_.find(rid);
if (iter == intfs_.end()) {
throw FbossError("Cannot find to be delete interface for router ", rid);
}
auto& intf = iter->second;
// remove the route table
removeRouteTable(intf->getIfIndex(), intf->getRouterId());
intf->setDelete();
intfs_.erase(iter);
}
void TunIntf::addAddress(const IPAddress& addr, uint8_t mask) {
auto ret = addrs_.emplace(addr, mask);
if (!ret.second) {
throw FbossError("Duplication interface address ", addr, "/",
static_cast<int>(mask), " for interface ", name_,
" @ index", ifIndex_);
}
VLOG(3) << "Added address " << addr.str() << "/"
<< static_cast<int>(mask) << " to interface " << name_
<< " @ index " << ifIndex_;
}
void BcmIntfTable::addIntf(const shared_ptr<Interface>& intf) {
auto newIntf = unique_ptr<BcmIntf>(new BcmIntf(hw_));
auto intfPtr = newIntf.get();
auto ret = intfs_.insert(make_pair(intf->getID(), std::move(newIntf)));
if (!ret.second) {
throw FbossError("Adding an existing interface ", intf->getID());
}
intfPtr->program(intf);
auto ret2 = bcmIntfs_.insert(make_pair(intfPtr->getBcmIfId(), intfPtr));
CHECK_EQ(ret2.second, true);
}
void BcmUnit::attach() {
if (attached_.load(std::memory_order_acquire)) {
throw FbossError("unit ", unit_, " already initialized");
}
auto rv = opennsl_switch_event_register(unit_, switchEventCallback, this);
bcmCheckError(rv, "unable to register switch event callback for unit ",
unit_);
attached_.store(true, std::memory_order_release);
}
void QsfpModule::setQsfpIdprom() {
uint8_t status[2];
int offset;
int length;
int dataAddress;
if (!present_) {
throw FbossError("QSFP IDProm set failed as QSFP is not present");
}
// Check if the data is ready
getQsfpFieldAddress(SffField::STATUS,
dataAddress, offset, length);
getQsfpValue(dataAddress, offset, length, status);
if (status[1] & (1 << 0)) {
dirty_ = true;
throw FbossError("QSFP IDProm failed as QSFP is not ready");
}
flatMem_ = status[1] & (1 << 2);
dirty_ = false;
}
