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-rwxr-xr-xhicn-light/src/platforms/linux/system.c184
1 files changed, 184 insertions, 0 deletions
diff --git a/hicn-light/src/platforms/linux/system.c b/hicn-light/src/platforms/linux/system.c
new file mode 100755
index 000000000..fcf13becc
--- /dev/null
+++ b/hicn-light/src/platforms/linux/system.c
@@ -0,0 +1,184 @@
+/*
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <ifaddrs.h>
+#include <src/config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+//#define __USE_MISC
+#include <net/if.h>
+
+// to get the list of arp types
+#include <net/if_arp.h>
+
+// for the mac address
+#include <netpacket/packet.h>
+
+#include <src/core/forwarder.h>
+#include <src/utils/interfaceSet.h>
+
+#include <parc/assert/parc_Assert.h>
+
+#include <src/utils/addressList.h>
+
+/**
+ * Returns the MTU for a named interface
+ *
+ * On linux, we get the MTU by opening a socket and reading SIOCGIFMTU
+ *
+ * @param [in] ifname Interface name (e.g. "eth0")
+ *
+ * @retval number The MTU in bytes
+ *
+ * Example:
+ * @code
+ * <#example#>
+ * @endcode
+ */
+static int getMtu(const char *ifname) {
+ struct ifreq ifr;
+ int fd;
+
+ fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
+
+ strcpy(ifr.ifr_name, ifname);
+ ioctl(fd, SIOCGIFMTU, &ifr);
+
+ close(fd);
+ return ifr.ifr_mtu;
+}
+
+InterfaceSet *system_Interfaces(Forwarder *forwarder) {
+ InterfaceSet *set = interfaceSetCreate();
+
+ Logger *logger = forwarder_GetLogger(forwarder);
+
+ // this is the dynamically allocated head of the list
+ struct ifaddrs *ifaddr;
+ int failure = getifaddrs(&ifaddr);
+ parcAssertFalse(failure, "Error getifaddrs: (%d) %s", errno, strerror(errno));
+
+ struct ifaddrs *next;
+ for (next = ifaddr; next != NULL; next = next->ifa_next) {
+ if ((next->ifa_addr == NULL) || ((next->ifa_flags & IFF_UP) == 0)) {
+ continue;
+ }
+
+ Interface *iface = interfaceSetGetByName(set, next->ifa_name);
+ if (iface == NULL) {
+ unsigned mtu = (unsigned)getMtu(next->ifa_name);
+
+ iface = interfaceCreate(
+ next->ifa_name, forwarder_GetNextConnectionId(forwarder),
+ next->ifa_flags & IFF_LOOPBACK, next->ifa_flags & IFF_MULTICAST, mtu);
+
+ interfaceSetAdd(set, iface);
+ }
+
+ int family = next->ifa_addr->sa_family;
+ switch (family) {
+ case AF_INET: {
+ Address *address =
+ addressCreateFromInet((struct sockaddr_in *)next->ifa_addr);
+ interfaceAddAddress(iface, address);
+ break;
+ }
+
+ case AF_INET6: {
+ Address *address =
+ addressCreateFromInet6((struct sockaddr_in6 *)next->ifa_addr);
+ interfaceAddAddress(iface, address);
+ break;
+ }
+
+ case AF_PACKET: {
+ struct sockaddr_ll *addr_ll = (struct sockaddr_ll *)next->ifa_addr;
+
+ if (logger_IsLoggable(logger, LoggerFacility_IO, PARCLogLevel_Debug)) {
+ logger_Log(logger, LoggerFacility_IO, PARCLogLevel_Debug, __func__,
+ "sockaddr_ll family %d proto %d ifindex %d hatype %d "
+ "pkttype %d halen %d",
+ addr_ll->sll_family, addr_ll->sll_protocol,
+ addr_ll->sll_ifindex, addr_ll->sll_hatype,
+ addr_ll->sll_pkttype, addr_ll->sll_halen);
+ }
+
+ switch (addr_ll->sll_hatype) {
+ // list of the ARP hatypes we can extract a MAC address from
+ case ARPHRD_ETHER:
+ // fallthrough
+ case ARPHRD_IEEE802: {
+ Address *address = addressCreateFromLink(
+ (uint8_t *)addr_ll->sll_addr, addr_ll->sll_halen);
+ interfaceAddAddress(iface, address);
+ break;
+ }
+ default:
+ break;
+ }
+
+ break;
+ }
+ }
+ }
+
+ freeifaddrs(ifaddr);
+ return set;
+}
+
+Address *system_GetMacAddressByName(Forwarder *forwarder,
+ const char *interfaceName) {
+ Address *linkAddress = NULL;
+
+ InterfaceSet *interfaceSet = system_Interfaces(forwarder);
+ Interface *interface = interfaceSetGetByName(interfaceSet, interfaceName);
+
+ if (interface) {
+ const AddressList *addressList = interfaceGetAddresses(interface);
+
+ size_t length = addressListLength(addressList);
+ for (size_t i = 0; i < length && !linkAddress; i++) {
+ const Address *a = addressListGetItem(addressList, i);
+ if (addressGetType(a) == ADDR_LINK) {
+ linkAddress = addressCopy(a);
+ }
+ }
+ }
+
+ interfaceSetDestroy(&interfaceSet);
+
+ return linkAddress;
+}
+
+unsigned system_InterfaceMtu(Forwarder *forwarder, const char *interfaceName) {
+ unsigned mtu = 0;
+
+ InterfaceSet *interfaceSet = system_Interfaces(forwarder);
+ Interface *interface = interfaceSetGetByName(interfaceSet, interfaceName);
+
+ if (interface) {
+ mtu = interfaceGetMTU(interface);
+ }
+
+ interfaceSetDestroy(&interfaceSet);
+
+ return mtu;
+}