[4] | 1 | /**
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| 2 | * @file network.cpp
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| 3 | * @author myusgun@gmail.com
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| 4 | * @brief network
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| 5 | */
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| 6 | #include "cf/network.h"
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| 7 |
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| 8 | #include <iostream>
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| 9 | #include <sstream>
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| 10 | #include <string.h>
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| 11 |
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| 12 | #ifdef _ON_WINDOWS
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| 13 | # include <WinSock2.h>
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| 14 | # pragma comment(lib, "ws2_32.lib")
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| 15 | #else
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| 16 | # include <netinet/in.h>
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| 17 | # include <sys/socket.h>
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| 18 | # include <arpa/inet.h>
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| 19 | # include <netdb.h>
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| 20 | # include <unistd.h>
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| 21 | # include <sys/un.h>
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| 22 | # include <fcntl.h>
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| 23 | # include <errno.h>
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| 24 | # include <sys/types.h>
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| 25 | # include <sys/time.h>
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| 26 | #endif
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| 27 |
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| 28 | #ifdef _ON_WINDOWS
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| 29 | typedef cf::int32_t socklen_t;
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| 30 | # define sa_family_t cf::uint16_t
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| 31 | # define ERROR_INTR WSAEINTR
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| 32 | # define ERROR_CONNECTING WSAEWOULDBLOCK
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| 33 | #else
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| 34 | # define closesocket(__sock) ::close(__sock)
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| 35 | # define ERROR_INTR EINTR
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| 36 | # define ERROR_CONNECTING EINPROGRESS
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| 37 | #endif
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| 38 |
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| 39 | #define ALLOW_SOCKET_TIME_WAIT
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| 40 |
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| 41 | cf::socket_t gInvalidSocket = -1;
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| 42 |
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| 43 | /*--------------------------------------------------------------*/
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| 44 | /**
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| 45 | * do not include "cf/macaddr.[ch]pp"
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| 46 | * just declare and call
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| 47 | */
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| 48 | long GetMACAddress(cf::char_t *addr);
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| 49 |
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| 50 | static cf::void_t waitForTimeout(const cf::socket_t sock,
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| 51 | const cf::int32_t timeout,
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| 52 | const cf::bool_t checkWriteFD)
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| 53 | throw (cf::exception)
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| 54 | {
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| 55 | cf::int32_t result = 0;
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| 56 | fd_set rfds;
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| 57 | fd_set wfds;
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| 58 | fd_set * wfdsPtr = checkWriteFD ? &wfds : NULL;
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| 59 |
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| 60 | struct timeval tv;
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| 61 |
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| 62 | if (timeout <= 0)
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| 63 | return;
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| 64 |
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| 65 | FD_ZERO(&rfds);
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| 66 | FD_SET(sock, &rfds);
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| 67 |
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| 68 | FD_ZERO(&wfds);
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| 69 | FD_SET(sock, &wfds);
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| 70 |
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| 71 | tv.tv_sec = timeout;
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| 72 | tv.tv_usec = 0;
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| 73 |
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| 74 | result = select(sock + 1, &rfds, wfdsPtr, NULL, &tv);
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| 75 | if (result < 0)
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| 76 | THROW_EXCEPTION("select error");
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| 77 | else if (result == 0)
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| 78 | THROW_EXCEPTION("socket timed out");
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| 79 |
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| 80 | if (!FD_ISSET(sock, &rfds))
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| 81 | {
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| 82 | if (!checkWriteFD)
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| 83 | THROW_EXCEPTION("read fd is not set");
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| 84 | else if (!FD_ISSET(sock, &wfds))
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| 85 | THROW_EXCEPTION("write fd is not set");
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| 86 | }
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| 87 | }
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| 88 |
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| 89 | static cf::void_t setLinger(cf::network::tcp & tcp)
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| 90 | throw (cf::exception)
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| 91 | {
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| 92 | #ifdef ALLOW_SOCKET_TIME_WAIT
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| 93 | return;
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| 94 | #else
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| 95 | try
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| 96 | {
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| 97 | struct linger linger;
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| 98 |
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| 99 | linger.l_onoff = 1;
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| 100 | linger.l_linger = 0;
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| 101 |
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| 102 | tcp.setOption(SO_LINGER, &linger, sizeof(linger));
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| 103 | }
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| 104 | catch (cf::exception & e)
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| 105 | {
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| 106 | FORWARD_EXCEPTION(e);
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| 107 | }
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| 108 | #endif
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| 109 | }
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| 110 |
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| 111 | static cf::void_t setReuseAddress(cf::network::tcp & tcp)
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| 112 | throw (cf::exception)
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| 113 | {
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| 114 | try
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| 115 | {
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| 116 | cf::int32_t reuseaddr = 1;
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| 117 |
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| 118 | tcp.setOption(SO_REUSEADDR, &reuseaddr, sizeof(reuseaddr));
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| 119 | }
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| 120 | catch (cf::exception & e)
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| 121 | {
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| 122 | FORWARD_EXCEPTION(e);
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| 123 | }
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| 124 | }
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| 125 | /*--------------------------------------------------------------*/
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| 126 |
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| 127 | cf::network::tcp::tcp(const cf::socket_t attachedSocket)
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| 128 | throw (cf::exception)
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| 129 | : mSocket (attachedSocket),
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| 130 | mTimeout(0)
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| 131 | {
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| 132 | static cf::bool_t isInitialized = false;
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| 133 |
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| 134 | /* initialize socket */
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| 135 | if (!isInitialized)
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| 136 | {
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| 137 | #if defined(_WIN32) || defined(_WIN64)
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| 138 | WSADATA winsockData;
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| 139 | cf::int32_t result = WSAStartup(MAKEWORD(2, 0), &winsockData);
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| 140 | if (result)
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| 141 | THROW_EXCEPTION("cannot start-up winsock");
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| 142 | #endif
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| 143 |
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| 144 | isInitialized = true;
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| 145 | }
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| 146 |
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| 147 | if (mSocket == gInvalidSocket)
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| 148 | mSocket = ::socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
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| 149 |
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| 150 | if (mSocket < 0)
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| 151 | THROW_EXCEPTION("cannot create a socket");
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| 152 | }
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| 153 |
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| 154 | cf::network::tcp::~tcp()
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| 155 | {
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| 156 | close();
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| 157 | }
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| 158 |
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| 159 | cf::void_t cf::network::tcp::close()
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| 160 | {
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| 161 | if (mSocket == gInvalidSocket)
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| 162 | return;
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| 163 |
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| 164 | closesocket(mSocket);
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| 165 |
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| 166 | mSocket = gInvalidSocket;
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| 167 | mHost = "";
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| 168 | mPort = 0;
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| 169 | }
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| 170 |
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| 171 | cf::void_t cf::network::tcp::connect(const cf::char_t * host,
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| 172 | const cf::uint16_t port,
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| 173 | const cf::int32_t timeout)
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| 174 | throw (cf::exception)
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| 175 | {
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| 176 | if (!host || !port)
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| 177 | THROW_EXCEPTION("invalid host info");
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| 178 |
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| 179 | cf::int32_t result = 0;
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| 180 | cf::int32_t retval = 0;
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| 181 | cf::int32_t length = 0;
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| 182 | struct sockaddr_in addr;
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| 183 | struct hostent * hostEnt;
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| 184 |
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| 185 | /* 1. set data */
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| 186 | addr.sin_family = AF_INET;
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| 187 | addr.sin_port = htons(port);
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| 188 | addr.sin_addr.s_addr = inet_addr(host);
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| 189 |
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| 190 | /* 2. get ip from hostname if inet_addr() is failed */
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| 191 | if (addr.sin_addr.s_addr == (unsigned int)-1)
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| 192 | {
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| 193 | hostEnt = gethostbyname(host);
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| 194 | if (hostEnt == NULL)
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| 195 | THROW_EXCEPTION("cannot get host by name");
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| 196 |
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| 197 | addr.sin_family = (sa_family_t)hostEnt->h_addrtype;
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| 198 | memcpy(&(addr.sin_addr.s_addr),
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| 199 | hostEnt->h_addr,
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| 200 | (size_t)hostEnt->h_length);
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| 201 | }
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| 202 |
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| 203 | /* 3. set options */
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| 204 | try
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| 205 | {
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| 206 | setLinger(*this);
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| 207 | setReuseAddress(*this);
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| 208 | }
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| 209 | catch (cf::exception & e)
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| 210 | {
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| 211 | FORWARD_EXCEPTION(e);
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| 212 | }
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| 213 |
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| 214 | if (timeout > 0)
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| 215 | setNonBlocking(true);
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| 216 |
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| 217 | /* 4. connect */
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| 218 | result = ::connect(mSocket, (struct sockaddr *)&addr, sizeof(addr));
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| 219 | if (result < 0)
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| 220 | {
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| 221 | if (timeout > 0)
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| 222 | {
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| 223 | if (cf::exception::systemCode() != ERROR_CONNECTING)
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| 224 | THROW_EXCEPTION("socket connect error");
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| 225 |
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| 226 | try
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| 227 | {
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| 228 | length = sizeof(retval);
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| 229 | waitForTimeout(mSocket, timeout, true);
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| 230 | getOption(SO_ERROR, &retval, &length);
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| 231 | }
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| 232 | catch (cf::exception & e)
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| 233 | {
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| 234 | FORWARD_EXCEPTION(e);
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| 235 | }
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| 236 |
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| 237 | if (retval)
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| 238 | THROW_EXCEPTION("cannot get error from socket option");
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| 239 | }
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| 240 | else
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| 241 | {
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| 242 | THROW_EXCEPTION("cannot connect to " << host << ":" << port);
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| 243 | }
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| 244 | }
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| 245 |
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| 246 | /* set */
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| 247 | mHost = host;
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| 248 | mPort = port;
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| 249 | mTimeout = timeout;
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| 250 | }
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| 251 |
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| 252 | cf::void_t cf::network::tcp::listen(const cf::uint16_t port,
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| 253 | const cf::int32_t backlog)
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| 254 | throw (cf::exception)
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| 255 | {
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| 256 | if (!port)
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| 257 | THROW_EXCEPTION("invalid port number");
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| 258 |
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| 259 | cf::int32_t result = 0;
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| 260 | struct sockaddr_in addr;
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| 261 |
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| 262 | /* 1. set data */
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| 263 | addr.sin_family = AF_INET;
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| 264 | addr.sin_addr.s_addr = htonl(INADDR_ANY);
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| 265 | addr.sin_port = htons(port);
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| 266 |
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| 267 | /* 2. set options */
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| 268 | try
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| 269 | {
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| 270 | setLinger(*this);
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| 271 | setReuseAddress(*this);
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| 272 | }
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| 273 | catch (cf::exception & e)
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| 274 | {
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| 275 | FORWARD_EXCEPTION(e);
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| 276 | }
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| 277 |
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| 278 | result = ::bind(mSocket, (struct sockaddr *)&addr, sizeof(struct sockaddr));
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| 279 | if (result < 0)
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| 280 | THROW_EXCEPTION("cannot bind to " << port);
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| 281 |
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| 282 | result = ::listen(mSocket, backlog);
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| 283 | if (result < 0)
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| 284 | THROW_EXCEPTION("cannot listen");
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| 285 | }
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| 286 |
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| 287 | cf::network::tcp cf::network::tcp::accept()
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| 288 | throw (cf::exception)
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| 289 | {
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| 290 | cf::socket_t sock = 0;
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| 291 | struct sockaddr_in addr;
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| 292 | socklen_t len = sizeof(addr);
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| 293 |
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| 294 | sock = ::accept(mSocket, (struct sockaddr *)&addr, /* in/out */&len);
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| 295 | if (sock < 0)
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| 296 | THROW_EXCEPTION("cannot accept client");
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| 297 |
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| 298 | return cf::network::tcp(sock).detach();
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| 299 | }
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| 300 |
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| 301 | cf::void_t cf::network::tcp::attach(const cf::socket_t sock)
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| 302 | throw (exception)
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| 303 | {
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| 304 | if (sock == gInvalidSocket)
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| 305 | THROW_EXCEPTION("has invalid socket");
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| 306 |
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| 307 | close();
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| 308 |
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| 309 | mSocket = sock;
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| 310 | }
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| 311 |
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| 312 | cf::socket_t cf::network::tcp::detach()
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| 313 | throw (exception)
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| 314 | {
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| 315 | if (mSocket == gInvalidSocket)
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| 316 | THROW_EXCEPTION("has invalid socket");
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| 317 |
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| 318 | cf::socket_t sock = mSocket;
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| 319 |
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| 320 | mSocket = gInvalidSocket;
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| 321 |
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| 322 | return sock;
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| 323 | }
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| 324 |
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| 325 | cf::void_t cf::network::tcp::send(const cf::bin & in)
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| 326 | throw (cf::exception)
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| 327 | {
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| 328 | if (in.empty())
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| 329 | THROW_EXCEPTION("send data is null or zero-bytes");
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| 330 |
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| 331 | cf::char_t * buf = reinterpret_cast<cf::char_t *>(in.buffer());
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| 332 | cf::int32_t size = static_cast<cf::int32_t>(in.size());
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| 333 |
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| 334 | cf::int32_t sentSize = (cf::int32_t)::send (mSocket, buf, size, 0);
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| 335 | if (sentSize != size)
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| 336 | THROW_EXCEPTION("cannot send (" << cf::exception::systemCode() << ")");
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| 337 | }
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| 338 |
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| 339 | cf::void_t cf::network::tcp::receive(cf::bin & out)
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| 340 | throw (cf::exception)
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| 341 | {
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| 342 | if (out.size() == 0)
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| 343 | THROW_EXCEPTION("binary buffer is not created");
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| 344 |
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| 345 | try
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| 346 | {
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| 347 | waitForTimeout(mSocket, mTimeout, false);
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| 348 | }
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| 349 | catch (cf::exception & e)
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| 350 | {
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| 351 | FORWARD_EXCEPTION(e);
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| 352 | }
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| 353 |
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| 354 | cf::char_t * buf = reinterpret_cast<cf::char_t *>(out.buffer());
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| 355 | cf::int32_t size = static_cast<cf::int32_t>(out.size());
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| 356 |
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| 357 | cf::int32_t receivedSize = (cf::int32_t)::recv(mSocket, buf, size, 0);
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| 358 | if (receivedSize < 0)
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| 359 | THROW_EXCEPTION("cannot receive (" << cf::exception::systemCode() << ")");
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| 360 | else if (receivedSize == 0)
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| 361 | out.clear();
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| 362 | else if (receivedSize < size)
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| 363 | out.resize(receivedSize);
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| 364 | }
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| 365 |
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| 366 | cf::bin cf::network::tcp::receive(const cf::int32_t size)
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| 367 | throw (cf::exception)
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| 368 | {
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| 369 | cf::bin out;
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| 370 |
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| 371 | out.resize(size);
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| 372 | receive(out);
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| 373 |
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| 374 | return out;
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| 375 | }
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| 376 |
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| 377 | cf::bin cf::network::tcp::receive()
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| 378 | throw (cf::exception)
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| 379 | {
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| 380 | const cf::size_t bufferSize = 1024;
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| 381 |
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| 382 | cf::bin buffer;
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| 383 | cf::bin out;
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| 384 |
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| 385 | buffer.resize(bufferSize);
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| 386 |
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| 387 | do
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| 388 | {
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| 389 | receive(buffer);
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| 390 | out.append(buffer);
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| 391 | } while (buffer.size() == bufferSize);
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| 392 |
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| 393 | return out;
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| 394 | }
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| 395 |
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| 396 | cf::void_t cf::network::tcp::getOption(const cf::int32_t optname,
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| 397 | cf::void_t * optval,
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| 398 | cf::int32_t * optlen)
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| 399 | throw (cf::exception)
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| 400 | {
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| 401 | cf::int32_t result = getsockopt(mSocket,
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| 402 | SOL_SOCKET,
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| 403 | optname,
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| 404 | #ifdef _ON_WINDOWS
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| 405 | (cf::char_t *)optval,
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| 406 | #else
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| 407 | optval,
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| 408 | #endif
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| 409 | (socklen_t *)optlen);
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| 410 | if (result < 0)
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| 411 | THROW_EXCEPTION("cannot get socket option ("
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| 412 | << cf::exception::systemCode()
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| 413 | << ")");
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| 414 | }
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| 415 |
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| 416 | cf::void_t cf::network::tcp::setOption(const cf::int32_t optname,
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| 417 | const cf::void_t * optval,
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| 418 | const cf::int32_t optlen)
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| 419 | throw (cf::exception)
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| 420 | {
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| 421 | cf::int32_t result = setsockopt(mSocket,
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| 422 | SOL_SOCKET,
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| 423 | optname,
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| 424 | #ifdef _ON_WINDOWS
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| 425 | (cf::char_t *)optval,
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| 426 | #else
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| 427 | optval,
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| 428 | #endif
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| 429 | (socklen_t)optlen);
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| 430 | if (result < 0)
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| 431 | THROW_EXCEPTION("cannot set socket option ("
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| 432 | << cf::exception::systemCode()
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| 433 | << ")");
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| 434 | }
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| 435 |
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| 436 | cf::void_t cf::network::tcp::setNonBlocking(const cf::bool_t flag)
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| 437 | {
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| 438 | #ifdef _ON_WINDOWS
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| 439 | cf::ulong_t mode = flag ? 1 : 0;
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| 440 | ioctlsocket(mSocket, FIONBIO, &mode);
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| 441 | #else
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| 442 | cf::int32_t mode = fcntl(mSocket, F_GETFL, 0);
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| 443 |
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| 444 | if (flag) mode |= O_NONBLOCK;
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| 445 | else mode &= ~O_NONBLOCK;
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| 446 |
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| 447 | fcntl(mSocket, F_SETFL, mode);
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| 448 | #endif
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| 449 | }
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| 450 |
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| 451 | cf::void_t cf::network::tcp::setTimeout(const cf::int32_t seconds)
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| 452 | {
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| 453 | mTimeout = seconds;
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| 454 | }
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| 455 |
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| 456 | std::string cf::network::nic::getMACAddress()
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| 457 | throw (cf::exception)
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| 458 | {
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| 459 | static const cf::int32_t macSize = 6; /* = 48-bits */
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| 460 | static cf::bool_t isDone = false;
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| 461 | static cf::uint8_t bytes[macSize] = {0x00,};
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| 462 | static cf::char_t asciiz[macSize * 2 + 1] = {0x00,};
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| 463 |
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| 464 | if (!isDone)
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| 465 | {
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| 466 | long result = 0;
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| 467 |
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| 468 | result = GetMACAddress(reinterpret_cast<cf::char_t *>(bytes));
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| 469 | if (result)
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| 470 | THROW_EXCEPTION("cannot get mac-address");
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| 471 |
|
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| 472 | for (cf::int32_t iter = 0 ; iter < macSize ; iter++)
|
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| 473 | snprintf(asciiz + (iter * 2), sizeof(asciiz) - 1,
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| 474 | "%02x",
|
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| 475 | bytes[iter]);
|
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| 476 |
|
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| 477 | isDone = true;
|
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| 478 | }
|
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| 479 |
|
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| 480 | return std::string(asciiz);
|
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| 481 | }
|
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