2 Copyright 2020 Chris Tallon
4 This file is part of VOMP.
6 VOMP is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 VOMP is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with VOMP. If not, see <https://www.gnu.org/licenses/>.
20 #include <string.h> // memcmp
26 #include <unistd.h> // pipe2
27 #include <fcntl.h> // pipe2-O_NONBLOCK fcntl
28 #include <sys/socket.h> // socket connect getaddrinfo
29 #include <netdb.h> // getaddrinfo
30 #include <sys/select.h> // select
31 #include <linux/if_packet.h> // for getMAC
32 #include <net/ethernet.h> // for getMAC
33 #include <ifaddrs.h> // getifaddrs
36 #include <sys/types.h> // socket connect getaddrinfo
37 #include <string.h> // memset
38 #include <errno.h> // errno var
50 CLOSESOCKET(abortSocket);
52 if (abortPipe[0] != -1)
64 logger = Log::getInstance();
67 abortSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
68 if (abortSocket == INVALID_SOCKET)
70 logger->log("TCP", Log::CRIT, "socket error");
74 if (pipe2(abortPipe, O_NONBLOCK) == -1)
76 logger->log("TCP", Log::CRIT, "pipe2 error");
84 bool TCP::connect(const std::string& ip, USHORT port)
86 if (connected) return false;
88 struct addrinfo hints;
89 memset(&hints, 0, sizeof(struct addrinfo));
90 hints.ai_family = AF_UNSPEC;
91 hints.ai_socktype = SOCK_STREAM;
92 hints.ai_flags = AI_NUMERICHOST | AI_NUMERICSERV;
96 SNPRINTF(portString, 10, "%u", port);
97 int gaiResult = getaddrinfo(ip.c_str(), portString, &hints, &aip);
99 if ((gaiResult != 0) || !aip)
101 logger->log("TCP", Log::CRIT, "getaddrinfo error");
105 sockfd = socket(aip->ai_family, SOCK_STREAM, 0);
106 if (sockfd == -1) { logger->log("TCP", Log::CRIT, "socket error"); return false; }
110 ioctlsocket(sockfd, FIONBIO, ¶m);
112 fcntl(sockfd, F_SETFL, O_NONBLOCK);
116 // There should only be one aip result..
117 int connectResult = ::connect(sockfd, aip->ai_addr, aip->ai_addrlen);
119 if (connectResult == 0) // success
127 if ((connectResult != SOCKET_ERROR) || (WSAGetLastError() != WSAEWOULDBLOCK))
129 if (errno != EINPROGRESS)
134 logger->log("TCP", Log::CRIT, "connect error");
138 // Wait for connect to complete
142 FD_SET(sockfd, &writefds);
146 FD_SET(abortSocket, &writefds);
148 FD_SET(abortPipe[0], &writefds);
149 if (abortPipe[0] > maxfd) maxfd = abortPipe[0];
152 tv.tv_sec = 5; // Allow 5s for a connect
155 int selectResult = select(maxfd + 1, NULL, &writefds, NULL, &tv);
157 if ((selectResult == 1) || FD_ISSET(sockfd, &writefds))
160 logger->log("TCP", Log::INFO, "connected");
168 logger->log("TCP", Log::CRIT, "connect/select error");
175 if (!connected) return;
186 void TCP::abortCall()
189 CLOSESOCKET(abortSocket);
191 ::write(abortPipe[1], "X", 1);
195 bool TCP::write(void* src, ULONG numBytes)
197 if (!connected) return false;
199 std::lock_guard<std::mutex> lg(writeMutex);
200 int result = send(sockfd, reinterpret_cast<char*>(src), numBytes, 0); // FIXME does send return < numBytes? Might need loop
201 if (result < 0) return false;
202 if (static_cast<ULONG>(result) != numBytes) return false;
207 bool TCP::read(void* dst, ULONG numBytes)
209 if (!connected) return false;
214 ULONG totalReceived = 0;
216 char* pointer = static_cast<char*>(dst); // WIN32 requires char*
222 logger->log("TCP", Log::DEBUG, "abortCount = 5");
227 FD_SET(sockfd, &readfds);
228 int maxfd = sockfd; // WIN32 ignores
231 FD_SET(abortSocket, &readfds);
233 FD_SET(abortPipe[0], &readfds);
234 if (abortPipe[0] > maxfd) maxfd = abortPipe[0];
240 int selectResult = select(maxfd + 1, &readfds, NULL, NULL, &tv);
242 if (selectResult == -1) { shutdown(); return false; }
243 if (selectResult == 0) return false;
246 if (FD_ISSET(abortSocket, &readfds)) { logger->log("TCP", Log::DEBUG, "aborting..."); return false; }
248 if (FD_ISSET(abortPipe[0], &readfds)) { logger->log("TCP", Log::DEBUG, "aborting..."); return false; }
251 int recvResult = recv(sockfd, pointer, numBytes - totalReceived, 0);
252 if (recvResult == -1) { shutdown(); return false; }
253 totalReceived += recvResult;
254 pointer += recvResult;
256 } while (totalReceived < numBytes);
261 MACAddress TCP::getMAC()
264 MACAddress macerror{ 00, 00, 00, 00, 00, 00 };
265 if (!connected) return macerror;
268 struct sockaddr - man 2 bind
269 struct sockaddr_in - man 7 ip
270 struct sockaddr_in6 - man 7 ipv6
271 struct sockaddr_ll - man 7 packet
274 // Measured sizeof(struct sockaddr_in) = 16, and in6 = 28
276 unsigned char gsnBuffer[buflen];
277 struct sockaddr* sap = reinterpret_cast<struct sockaddr*>(gsnBuffer);
278 if (getsockname(sockfd, sap, &buflen) == -1) return macerror;
281 unsigned char my6Addr[16];
283 if (sap->sa_family == AF_INET)
285 struct sockaddr_in* sap4 = reinterpret_cast<struct sockaddr_in*>(gsnBuffer);
286 my4AddrU32 = sap4->sin_addr.s_addr;
288 else if (sap->sa_family == AF_INET6)
290 struct sockaddr_in6* sap6 = reinterpret_cast<struct sockaddr_in6*>(gsnBuffer);
291 memcpy(my6Addr, sap6->sin6_addr.s6_addr, 16);
298 struct ifaddrs* ifAddrs;
299 if (getifaddrs(&ifAddrs) == -1) return macerror;
303 for(struct ifaddrs* ifa = ifAddrs; ifa != NULL; ifa = ifa->ifa_next)
305 if (ifa->ifa_addr->sa_family != sap->sa_family) continue;
307 if (sap->sa_family == AF_INET)
309 struct sockaddr_in* test = reinterpret_cast<struct sockaddr_in*>(ifa->ifa_addr);
310 if (test->sin_addr.s_addr == my4AddrU32)
312 ifName = ifa->ifa_name;
316 else if (sap->sa_family == AF_INET6)
318 struct sockaddr_in6* test = reinterpret_cast<struct sockaddr_in6*>(ifa->ifa_addr);
319 if (!memcmp(my6Addr, test->sin6_addr.s6_addr, 16))
321 ifName = ifa->ifa_name;
329 freeifaddrs(ifAddrs);
333 // Walk the list again to get the MAC for ifName using family == AF_PACKET
334 MACAddress toReturn = macerror;
336 for(struct ifaddrs* ifa = ifAddrs; ifa != NULL; ifa = ifa->ifa_next)
338 if (ifa->ifa_addr->sa_family != AF_PACKET) continue;
339 if (strcmp(ifName, ifa->ifa_name)) continue;
340 struct sockaddr_ll* sall = reinterpret_cast<struct sockaddr_ll*>(ifa->ifa_addr);
341 if (sall->sll_halen != 6) continue;
343 memcpy(&toReturn, sall->sll_addr, 6);
347 freeifaddrs(ifAddrs);
351 PIP_ADAPTER_INFO daptinfo = NULL;
353 GetAdaptersInfo(daptinfo, &size);
354 daptinfo = (PIP_ADAPTER_INFO)new char[size + 1];
355 MACAddress macresult;
356 memcpy(¯esult, "ABCDEF", 6);//Dummy Address
357 sockaddr_in sock_address;
358 int sockname_len = sizeof(sock_address);
359 getsockname(sockfd, (sockaddr*)&sock_address, &sockname_len);
360 ULONG sockip = sock_address.sin_addr.s_addr;
361 if (GetAdaptersInfo(daptinfo, &size) == ERROR_SUCCESS)
363 PIP_ADAPTER_INFO daptinfo_it = daptinfo;
364 while (daptinfo_it != NULL)
366 ULONG ipaddress = inet_addr(daptinfo_it->IpAddressList.IpAddress.String);
367 if (ipaddress == sockip)
369 memcpy(¯esult, daptinfo_it->Address, 6);
372 daptinfo_it = daptinfo_it->Next;
373 if (daptinfo_it == daptinfo) break;