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sf-pippijn |
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#include "deliantra/communicator.h" |
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#include "adt/logs.h" |
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#include <boost/lexical_cast.hpp> |
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#include <fcntl.h> |
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#include <netdb.h> |
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#include <netinet/in.h> |
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#include <sys/socket.h> |
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#include <unistd.h> |
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static std::string |
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strerror () |
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{ |
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return strerror (errno); |
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} |
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communicator::communicator (std::string const &server, std::string const &port) |
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: response_len (0) |
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, response { 0 } |
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{ |
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LOG ("net") << "creating socket\n"; |
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int sockfd = socket (AF_INET, SOCK_STREAM, 0); |
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if (sockfd == -1) |
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throw "socket: " + strerror (); |
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int portno = boost::lexical_cast<int> (port); |
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LOG ("net") << "resolving hostname: " << server << "\n"; |
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hostent *serverent = gethostbyname (server.c_str ()); |
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if (!serverent) |
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throw "gethostbyname: " + strerror (); |
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LOG ("net") << "connecting to: " << server << ":" << portno << "\n"; |
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sockaddr_in addr = { 0 }; |
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addr.sin_family = AF_INET; |
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memcpy (&addr.sin_addr.s_addr, serverent->h_addr, serverent->h_length); |
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addr.sin_port = htons (portno); |
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if (connect (sockfd, reinterpret_cast<sockaddr const *> (&addr), sizeof addr) == -1) |
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throw "connect: " + strerror (); |
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LOG ("net") << "setting socket to non-blocking\n"; |
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int flags = fcntl (sockfd, F_GETFL, 0); |
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if (flags == -1) |
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flags = 0; |
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if (fcntl (sockfd, F_SETFL, flags | O_NONBLOCK) == -1) |
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throw "fcntl: " + strerror (); |
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LOG ("net") << "setting up read callback\n"; |
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sock.set (sockfd, ev::READ); |
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sock.set<communicator, &communicator::read_cb> (this); |
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sock.start (); |
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} |
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void |
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communicator::set_packet_handler (interface::packet_handler &handler) |
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{ |
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on = &handler; |
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} |
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void |
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communicator::read_cb (ev::io &w, int revents) |
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{ |
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LOG ("net") << "data is ready\n"; |
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ssize_t readlen = read (w.fd, response + response_len, sizeof response - response_len); |
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if (readlen < 0) |
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throw "read: " + strerror (); |
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if (readlen == 0) |
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throw "connection reset by peer"; |
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response_len += readlen; |
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for (;;) |
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{ |
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if (response_len < 2) |
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break; |
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unsigned int cmd_len = response[0] << 8 | response[1]; |
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LOG ("net") << "command length is ready: " << cmd_len << "\n"; |
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if (response_len < cmd_len + 2) |
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break; |
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LOG ("net") << "command is ready; processing\n"; |
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on->receive (std::string (response + 2, response + 2 + cmd_len)); |
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memmove (response, response + 2 + cmd_len, response_len - 2 - cmd_len); |
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response_len -= 2 + cmd_len; |
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LOG ("net") << response_len << " bytes left\n"; |
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} |
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} |
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void |
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communicator::send (std::string const &command) |
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{ |
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LOG ("net") << "sending command: " << command << "\n"; |
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write (sock.fd, &static_cast<uint16_t const &> (htons (command.length ())), 2); |
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if (write (sock.fd, command.data (), command.length ()) == -1) |
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throw "write: " + strerror (); |
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} |
