First git commit.
This commit is contained in:
Jan Vidar Krey
292
src/netevent.c
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292
src/netevent.c
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/*
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* uhub - A tiny ADC p2p connection hub
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* Copyright (C) 2007-2009, Jan Vidar Krey
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "uhub.h"
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void net_on_read(int fd, short ev, void *arg)
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{
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static char buf[MAX_RECV_BUF];
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struct user* user = (struct user*) arg;
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char* pos;
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char* start;
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ssize_t offset;
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ssize_t size;
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ssize_t buflen;
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int more = 1;
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int flag_close = 0;
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hub_log(log_trace, "net_on_read() : fd=%d, ev=%d, arg=%p", fd, (int) ev, arg);
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if (ev == EV_TIMEOUT)
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{
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more = 0;
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if (user_is_connecting(user))
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{
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flag_close = quit_timeout;
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}
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else
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{
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hub_send_ping(user);
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}
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}
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while (more)
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{
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offset = 0;
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if (user->recv_buf)
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{
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memcpy(buf, user->recv_buf, user->recv_buf_offset);
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offset = user->recv_buf_offset;
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}
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else
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{
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offset = 0;
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}
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size = net_recv(fd, &buf[offset], MAX_RECV_BUF - offset, 0);
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if (size == -1)
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{
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if (net_error() != EWOULDBLOCK)
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flag_close = quit_socket_error;
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break;
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}
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else if (size == 0)
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{
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flag_close = quit_disconnected;
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break;
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}
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else
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{
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buflen = offset + size;
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start = buf;
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while ((pos = strchr(start, '\n')))
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{
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pos[0] = '\0';
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if (strlen(start) > 0 && strlen(start) < user->hub->config->max_recv_buffer)
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{
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if (hub_handle_message(user, start, &pos[0]-&start[0]) == -1)
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{
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flag_close = quit_protocol_error;
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more = 0;
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break;
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}
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}
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start = &pos[1];
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}
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if (!more) break;
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if (&buf[offset + size] > &start[0])
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{
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if (!user->recv_buf)
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{
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user->recv_buf = hub_malloc(user->hub->config->max_recv_buffer);
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}
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if (!user->recv_buf)
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{
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flag_close = quit_memory_error;
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break;
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}
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else
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{
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memcpy(user->recv_buf, start, &buf[offset + size] - &start[0]);
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user->recv_buf_offset = &buf[offset + size] - &start[0];
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}
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}
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else
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{
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if (user->recv_buf)
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{
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hub_free(user->recv_buf);
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user->recv_buf = 0;
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user->recv_buf_offset = 0;
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}
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}
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}
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}
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if (flag_close)
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{
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user_disconnect(user, flag_close);
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return;
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}
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if (user_is_logged_in(user))
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{
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if (user->ev_read)
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{
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struct timeval timeout = { TIMEOUT_IDLE, 0 };
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event_add(user->ev_read, &timeout);
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}
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}
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else if (user_is_connecting(user))
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{
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if (user->ev_read)
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{
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struct timeval timeout = { TIMEOUT_HANDSHAKE, 0 };
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event_add(user->ev_read, &timeout);
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}
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}
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}
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void net_on_write(int fd, short ev, void *arg)
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{
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struct user* user = (struct user*) arg;
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struct adc_message* msg;
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int ret;
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int length;
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int close_flag = 0;
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msg = list_get_first(user->send_queue);
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while (msg)
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{
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length = msg->length - user->send_queue_offset;
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ret = net_send(user->sd, &msg->cache[user->send_queue_offset], length, UHUB_SEND_SIGNAL);
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if (ret == 0 || (ret == -1 && net_error() == EWOULDBLOCK))
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{
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close_flag = 0;
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break;
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}
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else if (ret > 0)
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{
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user->tm_last_write = time(NULL);
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if (ret == length)
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{
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user->send_queue_size -= ret;
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user->send_queue_offset = 0;
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list_remove(user->send_queue, msg);
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if (user_flag_get(user, flag_user_list) && (msg == user->info || user->send_queue_size == 0))
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{
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user_flag_unset(user, flag_user_list);
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}
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adc_msg_free(msg);
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msg = 0;
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if (user->send_queue_size == 0)
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break;
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}
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else
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{
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user->send_queue_size -= ret;
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user->send_queue_offset -= ret;
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break;
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}
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}
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else
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{
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close_flag = quit_socket_error;
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break;
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}
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msg = list_get_first(user->send_queue);
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}
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if (close_flag)
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{
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user_disconnect(user, close_flag);
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}
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else
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{
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if (user->send_queue_size > 0 && user->ev_write)
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event_add(user->ev_write, NULL);
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}
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}
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void net_on_accept(int server_fd, short ev, void *arg)
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{
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struct hub_info* hub = (struct hub_info*) arg;
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struct user* user = 0;
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int accept_more = 1;
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const char* addr;
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struct timeval timeout = { TIMEOUT_CONNECTED, 0 };
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while (accept_more)
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{
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int fd = net_accept(server_fd);
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if (fd == -1)
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{
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if (net_error() == EWOULDBLOCK)
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{
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break;
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}
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else
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{
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hub_log(log_error, "Accept error: %d %s", net_error(), strerror(net_error()));
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break;
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}
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}
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addr = net_get_peer_address(fd);
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/* FIXME: Should have a plugin log this */
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hub_log(log_trace, "Got connection from %s", addr);
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/* FIXME: A plugin should perform this check: is IP banned? */
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if (acl_is_ip_banned(hub->acl, addr))
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{
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hub_log(log_info, "Denied [%s] (IP banned)", addr);
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net_close(fd);
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continue;
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}
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user = user_create(hub, fd);
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if (!user)
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{
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hub_log(log_error, "Unable to create user after socket accepted. Out of memory?");
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net_close(fd);
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break;
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}
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/* Store IP address in user object */
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ip_convert_to_binary(addr, &user->ipaddr);
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net_set_nonblocking(fd, 1);
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net_set_nosigpipe(fd, 1);
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event_set(user->ev_read, fd, EV_READ | EV_PERSIST, net_on_read, user);
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event_set(user->ev_write, fd, EV_WRITE, net_on_write, user);
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event_add(user->ev_read, &timeout);
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}
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}
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#ifdef ADC_UDP_OPERATION
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extern void net_on_packet(int fd, short ev, void *arg)
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{
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static char buffer[1024] = {0,};
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// struct hub_info* hub = (struct hub_info*) arg;
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// struct user* user = 0;
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ssize_t size;
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struct sockaddr_storage from;
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socklen_t fromlen;
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size = recvfrom(fd, buffer, 1024, 0, (struct sockaddr*) &from, &fromlen);
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// FIXME: A plugin should handle this!
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hub_log(log_info, "Datagram [%s] (%d bytes)", buffer, (int) size);
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}
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#endif
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