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/*
* 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 <hicn/transport/core/raw_socket_connector.h>
#include <hicn/transport/utils/conversions.h>
#include <hicn/transport/utils/log.h>
#include <net/if.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#define MY_DEST_MAC0 0x0a
#define MY_DEST_MAC1 0x7b
#define MY_DEST_MAC2 0x7c
#define MY_DEST_MAC3 0x1c
#define MY_DEST_MAC4 0x4a
#define MY_DEST_MAC5 0x14
namespace transport {
namespace core {
RawSocketConnector::RawSocketConnector(
PacketReceivedCallback &&receive_callback,
OnReconnect &&on_reconnect_callback, asio::io_service &io_service,
std::string app_name)
: Connector(std::move(receive_callback), std::move(on_reconnect_callback)),
io_service_(io_service),
socket_(io_service_, raw_protocol(PF_PACKET, SOCK_RAW)),
// resolver_(io_service_),
timer_(io_service_),
read_msg_(packet_pool_.makePtr(nullptr)),
data_available_(false),
app_name_(app_name) {
memset(&link_layer_address_, 0, sizeof(link_layer_address_));
}
RawSocketConnector::~RawSocketConnector() {}
void RawSocketConnector::connect(const std::string &interface_name,
const std::string &mac_address_str) {
state_ = ConnectorState::CONNECTING;
memset(ðernet_header_, 0, sizeof(ethernet_header_));
struct ifreq ifr;
struct ifreq if_mac;
uint8_t mac_address[6];
utils::convertStringToMacAddress(mac_address_str, mac_address);
// Get interface mac address
int fd = static_cast<int>(socket_.native_handle());
/* Get the index of the interface to send on */
memset(&ifr, 0, sizeof(struct ifreq));
strncpy(ifr.ifr_name, interface_name.c_str(), interface_name.size());
// if (ioctl(fd, SIOCGIFINDEX, &if_idx) < 0) {
// perror("SIOCGIFINDEX");
// }
/* Get the MAC address of the interface to send on */
memset(&if_mac, 0, sizeof(struct ifreq));
strncpy(if_mac.ifr_name, interface_name.c_str(), interface_name.size());
if (ioctl(fd, SIOCGIFHWADDR, &if_mac) < 0) {
perror("SIOCGIFHWADDR");
throw errors::RuntimeException("Interface does not exist");
}
/* Ethernet header */
for (int i = 0; i < 6; i++) {
ethernet_header_.ether_shost[i] =
((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[i];
ethernet_header_.ether_dhost[i] = mac_address[i];
}
/* Ethertype field */
ethernet_header_.ether_type = htons(ETH_P_IPV6);
strcpy(ifr.ifr_name, interface_name.c_str());
if (0 == ioctl(fd, SIOCGIFHWADDR, &ifr)) {
memcpy(link_layer_address_.sll_addr, ifr.ifr_hwaddr.sa_data, 6);
}
// memset(&ifr, 0, sizeof(ifr));
// ioctl(fd, SIOCGIFFLAGS, &ifr);
// ifr.ifr_flags |= IFF_PROMISC;
// ioctl(fd, SIOCSIFFLAGS, &ifr);
link_layer_address_.sll_family = AF_PACKET;
link_layer_address_.sll_protocol = htons(ETH_P_ALL);
link_layer_address_.sll_ifindex = if_nametoindex(interface_name.c_str());
link_layer_address_.sll_hatype = 1;
link_layer_address_.sll_halen = 6;
// startConnectionTimer();
doConnect();
doRecvPacket();
}
void RawSocketConnector::send(const uint8_t *packet, std::size_t len,
const PacketSentCallback &packet_sent) {
// asio::async_write(socket_, asio::buffer(packet, len),
// [packet_sent] (std::error_code ec,
// std::size_t /*length*/) {
// packet_sent();
// });
}
void RawSocketConnector::send(const Packet::MemBufPtr &packet) {
io_service_.post([this, packet]() {
bool write_in_progress = !output_buffer_.empty();
output_buffer_.push_back(std::move(packet));
if (TRANSPORT_EXPECT_TRUE(state_ == ConnectorState::CONNECTED)) {
if (!write_in_progress) {
doSendPacket();
} else {
// Tell the handle connect it has data to write
data_available_ = true;
}
}
});
}
void RawSocketConnector::close() {
io_service_.post([this]() { socket_.close(); });
}
void RawSocketConnector::doSendPacket() {
auto packet = output_buffer_.front().get();
auto array = std::vector<asio::const_buffer>();
const utils::MemBuf *current = packet;
do {
array.push_back(asio::const_buffer(current->data(), current->length()));
current = current->next();
} while (current != packet);
socket_.async_send(
std::move(array),
[this /*, packet*/](std::error_code ec, std::size_t bytes_transferred) {
if (TRANSPORT_EXPECT_TRUE(!ec)) {
output_buffer_.pop_front();
if (!output_buffer_.empty()) {
doSendPacket();
}
} else {
TRANSPORT_LOGE("%d %s", ec.value(), ec.message().c_str());
}
});
}
void RawSocketConnector::doRecvPacket() {
read_msg_ = getPacket();
socket_.async_receive(
asio::buffer(read_msg_->writableData(), packet_size),
[this](std::error_code ec, std::size_t bytes_transferred) mutable {
if (!ec) {
// Ignore packets that are not for us
uint8_t *dst_mac_address = const_cast<uint8_t *>(read_msg_->data());
if (!std::memcmp(dst_mac_address, ethernet_header_.ether_shost,
ETHER_ADDR_LEN)) {
read_msg_->append(bytes_transferred);
read_msg_->trimStart(sizeof(struct ether_header));
receive_callback_(std::move(read_msg_));
}
} else {
TRANSPORT_LOGE("%d %s", ec.value(), ec.message().c_str());
}
doRecvPacket();
});
}
void RawSocketConnector::doConnect() {
state_ = ConnectorState::CONNECTED;
socket_.bind(raw_endpoint(&link_layer_address_, sizeof(link_layer_address_)));
}
void RawSocketConnector::enableBurst() { return; }
} // end namespace core
} // end namespace transport
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