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authorFlorent Le Coz <louiz@louiz.org>2013-11-02 03:19:24 +0100
committerFlorent Le Coz <louiz@louiz.org>2013-11-02 03:19:24 +0100
commit7869ef2ace9a487abb0b489ca432b0a8878c5083 (patch)
treefbb112c8f49266b1bee8303b169b512871d1bd84 /src/libirc
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First step of the connection skeleton
Basic connect, socket creating, polling, recving, etc.
Diffstat (limited to 'src/libirc')
-rw-r--r--src/libirc/irc_client.cpp102
-rw-r--r--src/libirc/irc_client.hpp67
2 files changed, 169 insertions, 0 deletions
diff --git a/src/libirc/irc_client.cpp b/src/libirc/irc_client.cpp
new file mode 100644
index 0000000..a29e588
--- /dev/null
+++ b/src/libirc/irc_client.cpp
@@ -0,0 +1,102 @@
+#include <libirc/irc_client.hpp>
+#include <network/poller.hpp>
+#include <utils/scopeguard.hpp>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <cstring>
+#include <netdb.h>
+#include <unistd.h>
+
+#include <iostream>
+#include <stdexcept>
+
+IrcClient::IrcClient()
+{
+ std::cout << "IrcClient()" << std::endl;
+ if ((this->socket = ::socket(AF_INET, SOCK_STREAM, 0)) == -1)
+ throw std::runtime_error("Could not create socket");
+}
+
+IrcClient::~IrcClient()
+{
+ std::cout << "~IrcClient()" << std::endl;
+}
+
+void IrcClient::on_recv()
+{
+ char buf[4096];
+
+ ssize_t size = ::recv(this->socket, buf, 4096, 0);
+ if (0 == size)
+ this->on_connection_close();
+ else if (-1 == static_cast<ssize_t>(size))
+ throw std::runtime_error("Error reading from socket");
+ else
+ {
+ this->in_buf += std::string(buf, size);
+ this->parse_in_buffer();
+ }
+}
+
+void IrcClient::on_send()
+{
+}
+
+socket_t IrcClient::get_socket() const
+{
+ return this->socket;
+}
+
+void IrcClient::connect(const std::string& address, const std::string& port)
+{
+ std::cout << "Trying to connect to " << address << ":" << port << std::endl;
+ struct addrinfo hints;
+ memset(&hints, 0, sizeof(struct addrinfo));
+ hints.ai_flags = 0;
+ hints.ai_family = AF_INET;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_protocol = 0;
+
+ struct addrinfo* addr_res;
+ const int res = ::getaddrinfo(address.c_str(), port.c_str(), &hints, &addr_res);
+ // Make sure the alloced structure is always freed at the end of the
+ // function
+ utils::ScopeGuard sg([&addr_res](){ freeaddrinfo(addr_res); });
+
+ if (res != 0)
+ {
+ perror("getaddrinfo");
+ throw std::runtime_error("getaddrinfo failed");
+ }
+ for (struct addrinfo* rp = addr_res; rp; rp = rp->ai_next)
+ {
+ std::cout << "One result" << std::endl;
+ if (::connect(this->socket, rp->ai_addr, rp->ai_addrlen) == 0)
+ {
+ std::cout << "Connection success." << std::endl;
+ return ;
+ }
+ std::cout << "Connection failed:" << std::endl;
+ perror("connect");
+ }
+ std::cout << "All connection attempts failed." << std::endl;
+ this->close();
+}
+
+void IrcClient::on_connection_close()
+{
+ std::cout << "Connection closed by remote server." << std::endl;
+ this->close();
+}
+
+void IrcClient::close()
+{
+ this->poller->remove_socket_handler(this->get_socket());
+ ::close(this->socket);
+}
+
+void IrcClient::parse_in_buffer()
+{
+ std::cout << "Parsing: [" << this->in_buf << "]" << std::endl;
+}
diff --git a/src/libirc/irc_client.hpp b/src/libirc/irc_client.hpp
new file mode 100644
index 0000000..73e7efd
--- /dev/null
+++ b/src/libirc/irc_client.hpp
@@ -0,0 +1,67 @@
+#ifndef IRC_CLIENT_INCLUDED
+# define IRC_CLIENT_INCLUDED
+
+#include <network/socket_handler.hpp>
+
+#include <string>
+
+/**
+ * Represent one IRC client, i.e. an endpoint connected to a single IRC
+ * server, through a TCP socket, receiving and sending commands to it.
+ *
+ * TODO: TLS support, maybe, but that's not high priority
+ */
+class IrcClient: public SocketHandler
+{
+public:
+ explicit IrcClient();
+ ~IrcClient();
+ /**
+ * We read the data, try to parse it and generate some event if
+ * one or more full message is available.
+ */
+ void on_recv();
+ /**
+ * Just write as much data as possible on the socket.
+ */
+ void on_send();
+ socket_t get_socket() const;
+ /**
+ * Connect to the remote server
+ */
+ void connect(const std::string& address, const std::string& port);
+ /**
+ * Close the connection, remove us from the poller
+ */
+ void close();
+ /**
+ * Called when we detect an orderly close by the remote endpoint.
+ */
+ void on_connection_close();
+ /**
+ * Parse the data we have received so far and try to get one or more
+ * complete messages from it.
+ */
+ void parse_in_buffer();
+
+private:
+ socket_t socket;
+ /**
+ * Where data read from the socket is added, until we can parse a whole
+ * IRC message, the used data is then removed from that buffer.
+ *
+ * TODO: something more efficient than a string.
+ */
+ std::string in_buf;
+ /**
+ * Where data is added, when we want to send something to the client.
+ */
+ std::string out_buf;
+
+ IrcClient(const IrcClient&) = delete;
+ IrcClient(IrcClient&&) = delete;
+ IrcClient& operator=(const IrcClient&) = delete;
+ IrcClient& operator=(IrcClient&&) = delete;
+};
+
+#endif // IRC_CLIENT_INCLUDED