uhub/src/core/netevent.c

276 lines
5.6 KiB
C
Raw Normal View History

2009-02-19 16:14:09 +00:00
/*
* uhub - A tiny ADC p2p connection hub
* Copyright (C) 2007-2009, Jan Vidar Krey
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "uhub.h"
#include "hubio.h"
2009-02-19 16:14:09 +00:00
/* FIXME: This should not be needed! */
extern struct hub_info* g_hub;
2009-02-19 16:14:09 +00:00
2009-06-22 16:44:07 +00:00
#ifdef DEBUG_SENDQ
void debug_sendq_send(struct hub_user* user, int sent, int total)
2009-06-22 16:44:07 +00:00
{
LOG_DUMP("SEND: sd=%d, %d/%d bytes\n", user->net.connection.sd, sent, total);
2009-06-22 16:44:07 +00:00
if (sent == -1)
{
int err = net_error();
LOG_DUMP(" errno: %d - %s\n", err, net_error_string(err));
2009-06-22 16:44:07 +00:00
}
}
void debug_sendq_recv(struct hub_user* user, int received, int max, const char* buffer)
2009-06-22 16:44:07 +00:00
{
LOG_DUMP("RECV: %d/%d bytes\n", received, (int) max);
2009-07-25 01:23:27 +00:00
if (received == -1)
2009-06-22 16:44:07 +00:00
{
int err = net_error();
LOG_DUMP(" errno: %d - %s\n", err, net_error_string(err));
2009-06-22 16:44:07 +00:00
}
2009-07-25 01:23:27 +00:00
else if (received > 0)
2009-06-22 16:44:07 +00:00
{
2009-07-25 01:23:27 +00:00
char* data = hub_malloc_zero(received + 1);
memcpy(data, buffer, received);
LOG_DUMP("RECV: \"%s\"\n", data);
2009-06-22 16:44:07 +00:00
hub_free(data);
}
}
#endif
int net_user_send(void* ptr, const void* buf, size_t len)
{
struct hub_user* user = (struct hub_user*) ptr;
int ret = net_con_send(&user->net.connection, buf, len);
2009-05-26 19:05:06 +00:00
#ifdef DEBUG_SENDQ
2009-06-22 16:44:07 +00:00
debug_sendq_send(user, ret, len);
#endif
if (ret > 0)
return ret;
if (ret == 0)
2009-06-22 16:44:07 +00:00
return -2;
else
return -1;
2009-06-22 16:44:07 +00:00
}
int net_user_recv(void* ptr, void* buf, size_t len)
{
struct hub_user* user = (struct hub_user*) ptr;
int ret = net_con_recv(&user->net.connection, buf, len);
2009-06-22 16:44:07 +00:00
#ifdef DEBUG_SENDQ
debug_sendq_recv(user, ret, len, buf);
#endif
return ret;
}
int handle_net_read(struct hub_user* user)
2009-02-19 16:14:09 +00:00
{
static char buf[MAX_RECV_BUF];
struct hub_recvq* q = user->net.recv_queue;
2009-06-30 20:15:08 +00:00
size_t buf_size = hub_recvq_get(q, buf, MAX_RECV_BUF);
ssize_t size = net_user_recv(user, &buf[buf_size], MAX_RECV_BUF - buf_size);
if (size > 0)
buf_size += size;
if (size < 0)
{
if (size == -1)
return quit_disconnected;
else
return quit_socket_error;
}
else if (size == 0)
{
return 0;
}
else
{
2009-06-30 20:15:08 +00:00
char* lastPos = 0;
char* start = buf;
char* pos = 0;
2009-06-30 20:15:08 +00:00
size_t remaining = buf_size;
while ((pos = memchr(start, '\n', remaining)))
2009-02-19 16:14:09 +00:00
{
2009-06-30 20:15:08 +00:00
lastPos = pos;
pos[0] = '\0';
2009-05-26 19:05:06 +00:00
#ifdef DEBUG_SENDQ
LOG_DUMP("PROC: \"%s\" (%d)\n", start, (int) (pos - start));
2009-05-26 19:05:06 +00:00
#endif
2009-06-30 20:15:08 +00:00
if (user_flag_get(user, flag_maxbuf))
{
user_flag_unset(user, flag_maxbuf);
}
else
2009-05-26 19:05:06 +00:00
{
2009-07-01 09:31:55 +00:00
if (((pos - start) > 0) && g_hub->config->max_recv_buffer > (pos - start))
2009-06-30 20:15:08 +00:00
{
if (hub_handle_message(g_hub, user, start, (pos - start)) == -1)
{
return quit_protocol_error;
break;
}
}
2009-02-19 16:14:09 +00:00
}
2009-06-30 20:15:08 +00:00
pos[0] = '\n'; /* FIXME: not needed */
pos ++;
remaining -= (pos - start);
start = pos;
}
2009-06-30 20:15:08 +00:00
if (lastPos)
{
2009-06-30 20:15:08 +00:00
if (remaining < g_hub->config->max_recv_buffer)
{
hub_recvq_set(q, lastPos, remaining);
}
else
{
hub_recvq_set(q, 0, 0);
user_flag_set(user, flag_maxbuf);
}
}
else
{
hub_recvq_set(q, 0, 0);
2009-02-19 16:14:09 +00:00
}
}
return 0;
}
int handle_net_write(struct hub_user* user)
{
int ret = 0;
while (hub_sendq_get_bytes(user->net.send_queue))
{
ret = hub_sendq_send(user->net.send_queue, net_user_send, user);
2009-07-19 12:45:15 +00:00
if (ret <= 0)
break;
}
if (ret == -1)
return quit_disconnected;
if (ret < 0)
return quit_socket_error;
if (hub_sendq_get_bytes(user->net.send_queue))
{
user_net_io_want_write(user);
}
else
{
user_net_io_want_read(user);
}
return 0;
}
void net_event(int fd, short ev, void *arg)
{
struct hub_user* user = (struct hub_user*) arg;
int flag_close = 0;
#ifdef DEBUG_SENDQ
LOG_TRACE("net_on_read() : fd=%d, ev=%d, arg=%p", fd, (int) ev, arg);
#endif
if (ev & EV_TIMEOUT)
{
if (user_is_connecting(user))
{
flag_close = quit_timeout;
}
else
{
// FIXME: hub is not neccesarily set!
// hub_send_ping(hub, user);
}
}
if (ev & EV_READ)
{
flag_close = handle_net_read(user);
}
2009-07-19 01:39:11 +00:00
else if (ev & EV_WRITE)
{
flag_close = handle_net_write(user);
}
2009-02-19 16:14:09 +00:00
if (flag_close)
{
hub_disconnect_user(g_hub, user, flag_close);
2009-02-19 16:14:09 +00:00
return;
}
}
void net_on_accept(int server_fd, short ev, void *arg)
{
struct hub_info* hub = (struct hub_info*) arg;
struct hub_user* user = 0;
struct ip_addr_encap ipaddr;
2009-02-19 16:14:09 +00:00
const char* addr;
for (;;)
2009-02-19 16:14:09 +00:00
{
int fd = net_accept(server_fd, &ipaddr);
2009-02-19 16:14:09 +00:00
if (fd == -1)
{
if (net_error() == EWOULDBLOCK)
{
break;
}
else
{
LOG_ERROR("Accept error: %d %s", net_error(), strerror(net_error()));
2009-02-19 16:14:09 +00:00
break;
}
}
addr = ip_convert_to_string(&ipaddr);
2009-02-19 16:14:09 +00:00
/* FIXME: Should have a plugin log this */
LOG_TRACE("Got connection from %s", addr);
2009-02-19 16:14:09 +00:00
/* FIXME: A plugin should perform this check: is IP banned? */
if (acl_is_ip_banned(hub->acl, addr))
{
LOG_INFO("Denied [%s] (IP banned)", addr);
2009-02-19 16:14:09 +00:00
net_close(fd);
continue;
}
2009-02-19 16:14:09 +00:00
user = user_create(hub, fd);
if (!user)
{
LOG_ERROR("Unable to create user after socket accepted. Out of memory?");
2009-02-19 16:14:09 +00:00
net_close(fd);
break;
}
2009-02-19 16:14:09 +00:00
/* Store IP address in user object */
memcpy(&user->net.ipaddr, &ipaddr, sizeof(ipaddr));
#ifdef SSL_SUPPORT
net_con_ssl_accept(&user->net.connection);
#endif
2009-02-19 16:14:09 +00:00
}
}