1 // ***************************************************************************
2 // TcpSocketEngine_unix_p.cpp (c) 2011 Derek Barnett
3 // Marth Lab, Department of Biology, Boston College
4 // ---------------------------------------------------------------------------
5 // Last modified: 15 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 // ------------------------
27 } // namespace Internal
28 } // namespace BamTools
30 // --------------------------------
31 // TcpSocketEngine implementation
32 // --------------------------------
34 void TcpSocketEngine::nativeClose(void) {
35 close(m_socketDescriptor);
38 bool TcpSocketEngine::nativeConnect(const HostAddress& address, const uint16_t port) {
40 // setup connection parameters from address/port
41 sockaddr_in sockAddrIPv4;
42 sockaddr_in6 sockAddrIPv6;
43 sockaddr* sockAddrPtr = 0;
44 BT_SOCKLEN_T sockAddrSize = 0;
47 if ( address.GetProtocol() == HostAddress::IPv6Protocol ) {
49 memset(&sockAddrIPv6, 0, sizeof(sockAddrIPv6));
50 sockAddrIPv6.sin6_family = AF_INET6;
51 sockAddrIPv6.sin6_port = htons(port);
53 IPv6Address ip6 = address.GetIPv6Address();
54 memcpy(&sockAddrIPv6.sin6_addr.s6_addr, &ip6, sizeof(ip6));
56 sockAddrSize = sizeof(sockAddrIPv6);
57 sockAddrPtr = (sockaddr*)&sockAddrIPv6;
61 else if ( address.GetProtocol() == HostAddress::IPv4Protocol ) {
63 memset(&sockAddrIPv4, 0, sizeof(sockAddrIPv4));
64 sockAddrIPv4.sin_family = AF_INET;
65 sockAddrIPv4.sin_port = htons(port);
66 sockAddrIPv4.sin_addr.s_addr = htonl(address.GetIPv4Address());
68 sockAddrSize = sizeof(sockAddrIPv4);
69 sockAddrPtr = (sockaddr*)&sockAddrIPv4;
72 // unknown (should be unreachable)
73 else BT_ASSERT_X(false, "TcpSocketEngine::nativeConnect() : unknown network protocol");
76 int connectResult = connect(m_socketDescriptor, sockAddrPtr, sockAddrSize);
78 // if failed, handle error
79 if ( connectResult == -1 ) {
81 // ensure state is set before checking errno
82 m_socketState = TcpSocket::UnconnectedState;
84 // set error type/message depending on errno
85 switch ( errno ) { // <-- potential thread issues later? but can't get error type from connectResult
88 m_socketState = TcpSocket::ConnectedState; // socket was already connected
92 m_socketError = TcpSocket::ConnectionRefusedError;
93 m_errorString = "connection refused";
96 m_socketError = TcpSocket::NetworkError;
97 m_errorString = "connection timed out";
100 m_socketError = TcpSocket::NetworkError;
101 m_errorString = "host unreachable";
104 m_socketError = TcpSocket::NetworkError;
105 m_errorString = "network unreachable";
108 m_socketError = TcpSocket::SocketResourceError;
109 m_errorString = "address already in use";
113 m_socketError = TcpSocket::SocketAccessError;
114 m_errorString = "permission denied";
120 // double check that we're not in 'connected' state; if so, return failure
121 if ( m_socketState != TcpSocket::ConnectedState )
125 // otherwise, we should be good
126 // update state & return success
127 m_socketState = TcpSocket::ConnectedState;
131 bool TcpSocketEngine::nativeCreateSocket(HostAddress::NetworkProtocol protocol) {
133 // get protocol value for requested protocol type
134 const int protocolNum = ( (protocol == HostAddress::IPv6Protocol) ? AF_INET6
137 // attempt to create socket
138 int socketFd = socket(protocolNum, SOCK_STREAM, IPPROTO_TCP);
140 // if we fetched an invalid socket descriptor
141 if ( socketFd <= 0 ) {
143 // see what error we got
145 case EPROTONOSUPPORT:
148 m_socketError = TcpSocket::UnsupportedSocketOperationError;
149 m_errorString = "protocol not supported";
155 m_socketError = TcpSocket::SocketResourceError;
156 m_errorString = "out of resources";
159 m_socketError = TcpSocket::SocketAccessError;
160 m_errorString = "permission denied";
170 // otherwise, store our socket FD & return success
171 m_socketDescriptor = socketFd;
175 int64_t TcpSocketEngine::nativeNumBytesAvailable(void) const {
177 // fetch number of bytes, return 0 on error
179 if ( ioctl(m_socketDescriptor, FIONREAD, (char*)&numBytes) < 0 )
181 return static_cast<int64_t>(numBytes);
184 int64_t TcpSocketEngine::nativeRead(char* dest, size_t max) {
185 const ssize_t ret = read(m_socketDescriptor, dest, max);
186 return static_cast<int64_t>(ret);
189 // negative value for msecs will block (forever) until ready
190 int TcpSocketEngine::nativeSelect(int msecs, bool isRead) const {
195 FD_SET(m_socketDescriptor, &fds);
199 tv.tv_sec = msecs / 1000;
200 tv.tv_usec = (msecs % 1000) * 1000;
204 return select(m_socketDescriptor + 1, &fds, 0, 0, (msecs < 0 ? 0 : &tv));
206 return select(m_socketDescriptor + 1, 0, &fds, 0, (msecs < 0 ? 0 : &tv));
209 int64_t TcpSocketEngine::nativeWrite(const char* data, size_t length) {
210 const ssize_t writtenBytes = write(m_socketDescriptor, data, length);
211 return static_cast<int64_t>(writtenBytes);