Need help implementing simple socket server using GIOService (GLib, Glib-GIO)
- by Mark Renouf
I'm learning the basics of writing a simple, efficient socket server using GLib. I'm experimenting with GSocketService. So far I can only seem to accept connections but then they are immediately closed. From the docs I can't figure out what step I am missing. I'm hoping someone can shed some light on this for me.
When running the following:
# telnet localhost 4000
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.
# telnet localhost 4000
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.
# telnet localhost 4000
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.
Output from the server:
# ./server
New Connection from 127.0.0.1:36962
New Connection from 127.0.0.1:36963
New Connection from 127.0.0.1:36965
Current code:
/*
* server.c
*
* Created on: Mar 10, 2010
* Author: mark
*/
#include <glib.h>
#include <gio/gio.h>
gchar *buffer;
gboolean
network_read(GIOChannel *source,
GIOCondition cond,
gpointer data)
{
GString *s = g_string_new(NULL);
GError *error;
GIOStatus ret = g_io_channel_read_line_string(source, s, NULL, &error);
if (ret == G_IO_STATUS_ERROR)
g_error ("Error reading: %s\n", error->message);
else
g_print("Got: %s\n", s->str);
}
gboolean
new_connection(GSocketService *service,
GSocketConnection *connection,
GObject *source_object,
gpointer user_data)
{
GSocketAddress *sockaddr = g_socket_connection_get_remote_address(connection, NULL);
GInetAddress *addr = g_inet_socket_address_get_address(G_INET_SOCKET_ADDRESS(sockaddr));
guint16 port = g_inet_socket_address_get_port(G_INET_SOCKET_ADDRESS(sockaddr));
g_print("New Connection from %s:%d\n", g_inet_address_to_string(addr), port);
GSocket *socket = g_socket_connection_get_socket(connection);
gint fd = g_socket_get_fd(socket);
GIOChannel *channel = g_io_channel_unix_new(fd);
g_io_add_watch(channel, G_IO_IN, (GIOFunc) network_read, NULL);
return TRUE;
}
int main(int argc, char **argv) {
g_type_init();
GSocketService *service = g_socket_service_new();
GInetAddress *address = g_inet_address_new_from_string("127.0.0.1");
GSocketAddress *socket_address = g_inet_socket_address_new(address, 4000);
g_socket_listener_add_address(G_SOCKET_LISTENER(service), socket_address, G_SOCKET_TYPE_STREAM,
G_SOCKET_PROTOCOL_TCP, NULL, NULL, NULL);
g_object_unref(socket_address);
g_object_unref(address);
g_socket_service_start(service);
g_signal_connect(service, "incoming", G_CALLBACK(new_connection), NULL);
GMainLoop *loop = g_main_loop_new(NULL, FALSE);
g_main_loop_run(loop);
}
