1 // ***************************************************************************
2 // TcpSocketEngine_unix_p.cpp (c) 2011 Derek Barnett
3 // Marth Lab, Department of Biology, Boston College
4 // ---------------------------------------------------------------------------
5 // Last modified: 10 November 2011 (DB)
6 // ---------------------------------------------------------------------------
7 // Provides low-level implementation of TCP I/O for all UNIX-like systems
8 // ***************************************************************************
10 #include "api/internal/io/TcpSocketEngine_p.h"
11 #include "api/internal/io/NetUnix_p.h"
12 using namespace BamTools;
13 using namespace BamTools::Internal;
20 // ------------------------
21 // static utility methods
22 // ------------------------
28 //void getPortAndAddress(const sockaddr* s, uint16_t& port, HostAddress& address) {
31 // if (s->sa_family == AF_INET6) {
32 // sockaddr_in6* ip6 = (sockaddr_in6*)s;
33 // port = ntohs(ip6->sin6_port);
35 // memcpy(&tmp.data, &(ip6->sin6_addr.s6_addr), sizeof(tmp));
36 // address.SetAddress(tmp);
41 // if ( s->sa_family == AF_INET ) {
42 // sockaddr_in* ip4 = (sockaddr_in*)s;
43 // port = ntohl(ip4->sin_port);
44 // address.SetAddress( ntohl(ip4->sin_addr.s_addr) );
48 // // should be unreachable
49 // BT_ASSERT_X(false, "TcpSocketEngine::getPortAndAddress() : unknown network protocol ");
52 } // namespace Internal
53 } // namespace BamTools
55 // --------------------------------
56 // TcpSocketEngine implementation
57 // --------------------------------
59 void TcpSocketEngine::nativeClose(void) {
60 close(m_socketDescriptor);
63 bool TcpSocketEngine::nativeConnect(const HostAddress& address, const uint16_t port) {
65 // setup connection parameters from address/port
66 sockaddr_in sockAddrIPv4;
67 sockaddr_in6 sockAddrIPv6;
68 sockaddr* sockAddrPtr = 0;
69 BT_SOCKLEN_T sockAddrSize = 0;
72 if ( address.GetProtocol() == HostAddress::IPv6Protocol ) {
74 memset(&sockAddrIPv6, 0, sizeof(sockAddrIPv6));
75 sockAddrIPv6.sin6_family = AF_INET6;
76 sockAddrIPv6.sin6_port = htons(port);
78 IPv6Address ip6 = address.GetIPv6Address();
79 memcpy(&sockAddrIPv6.sin6_addr.s6_addr, &ip6, sizeof(ip6));
81 sockAddrSize = sizeof(sockAddrIPv6);
82 sockAddrPtr = (sockaddr*)&sockAddrIPv6;
86 else if ( address.GetProtocol() == HostAddress::IPv4Protocol ) {
88 memset(&sockAddrIPv4, 0, sizeof(sockAddrIPv4));
89 sockAddrIPv4.sin_family = AF_INET;
90 sockAddrIPv4.sin_port = htons(port);
91 sockAddrIPv4.sin_addr.s_addr = htonl(address.GetIPv4Address());
93 sockAddrSize = sizeof(sockAddrIPv4);
94 sockAddrPtr = (sockaddr*)&sockAddrIPv4;
97 // unknown (should be unreachable)
98 else BT_ASSERT_X(false, "TcpSocketEngine::nativeConnect() : unknown network protocol");
100 // attempt connection
101 int connectResult = connect(m_socketDescriptor, sockAddrPtr, sockAddrSize);
104 if ( connectResult == -1 ) {
106 // see what error was encountered
110 m_socketState = TcpSocket::ConnectedState;
114 m_socketError = TcpSocket::ConnectionRefusedError;
115 m_socketState = TcpSocket::UnconnectedState;
116 m_errorString = "connection refused";
119 m_socketError = TcpSocket::NetworkError;
120 m_errorString = "connection timed out";
123 m_socketError = TcpSocket::NetworkError;
124 m_socketState = TcpSocket::UnconnectedState;
125 m_errorString = "host unreachable";
128 m_socketError = TcpSocket::NetworkError;
129 m_socketState = TcpSocket::UnconnectedState;
130 m_errorString = "network unreachable";
133 m_socketError = TcpSocket::NetworkError;
134 m_errorString = "address already in use";
138 m_socketError = TcpSocket::SocketAccessError;
139 m_socketState = TcpSocket::UnconnectedState;
140 m_errorString = "permission denied";
145 m_socketState = TcpSocket::UnconnectedState;
150 if ( m_socketState != TcpSocket::ConnectedState )
154 // otherwise, we should be good
155 // update state & return success
156 m_socketState = TcpSocket::ConnectedState;
160 bool TcpSocketEngine::nativeCreateSocket(HostAddress::NetworkProtocol protocol) {
162 // get protocol value for requested protocol type
163 const int protocolNum = ( (protocol == HostAddress::IPv6Protocol) ? AF_INET6
166 // attempt to create socket
167 int socketFd = socket(protocolNum, SOCK_STREAM, IPPROTO_TCP);
169 // if we fetched an invalid socket descriptor
170 if ( socketFd <= 0 ) {
172 // see what error we got
174 case EPROTONOSUPPORT:
177 m_socketError = TcpSocket::UnsupportedSocketOperationError;
178 m_errorString = "protocol not supported";
184 m_socketError = TcpSocket::SocketResourceError;
185 m_errorString = "out of resources";
188 m_socketError = TcpSocket::SocketAccessError;
189 m_errorString = "permission denied";
199 // otherwise, store our socket FD & return success
200 m_socketDescriptor = socketFd;
204 //bool TcpSocketEngine::nativeFetchConnectionParameters(void) {
206 // // reset addresses/ports
207 //// m_localAddress.Clear();
208 // m_remoteAddress.Clear();
209 //// m_localPort = 0;
212 // // skip (return failure) if invalid socket FD
213 // if ( m_socketDescriptor == -1 )
217 // BT_SOCKLEN_T sockAddrSize = sizeof(sa);
219 // // fetch local address info
220 // memset(&sa, 0, sizeof(sa));
221 // if ( getsockname(m_socketDescriptor, &sa, &sockAddrSize) == 0 )
222 // getPortAndAddress(&sa, m_localPort, m_localAddress);
223 // else if ( errno == EBADF ) {
224 // m_socketError = TcpSocket::UnsupportedSocketOperationError;
225 // m_errorString = "invalid socket descriptor";
229 // // fetch remote address
230 // if ( getpeername(m_socketDescriptor, &sa, &sockAddrSize) == 0 )
231 // getPortAndAddress(&sa, m_remotePort, m_remoteAddress);
237 int64_t TcpSocketEngine::nativeNumBytesAvailable(void) const {
239 // fetch number of bytes, return 0 on error
241 if ( ioctl(m_socketDescriptor, FIONREAD, (char*)&numBytes) < 0 )
243 return static_cast<int64_t>(numBytes);
246 int64_t TcpSocketEngine::nativeRead(char* dest, size_t max) {
251 ssize_t ret = read(m_socketDescriptor, dest, max);
256 // No data was available for reading
266 return static_cast<int64_t>(ret);
269 // negative value for msecs will block (forever) until ready
270 int TcpSocketEngine::nativeSelect(int msecs, bool isRead) const {
275 FD_SET(m_socketDescriptor, &fds);
279 tv.tv_sec = msecs / 1000;
280 tv.tv_usec = (msecs % 1000) * 1000;
285 ret = select(m_socketDescriptor + 1, &fds, 0, 0, (msecs < 0 ? 0 : &tv));
287 ret = select(m_socketDescriptor + 1, 0, &fds, 0, (msecs < 0 ? 0 : &tv));
291 int64_t TcpSocketEngine::nativeWrite(const char* data, size_t length) {
293 ssize_t writtenBytes = write(m_socketDescriptor, data, length);
294 if ( writtenBytes < 0 ) {
299 m_socketError = TcpSocket::RemoteHostClosedError;
300 m_errorString = "remote host closed connection";
310 return static_cast<int64_t>(writtenBytes);