Reorganized sources slightly.
This commit is contained in:
Jan Vidar Krey
350
src/core/netevent.c
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350
src/core/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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#include "hubio.h"
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/* FIXME: This should not be needed! */
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extern struct hub_info* g_hub;
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#ifdef DEBUG_SENDQ
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void debug_sendq_send(struct user* user, int sent, int total)
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{
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printf("SEND: sd=%d, %d/%d bytes\n", user->net.sd, sent, total);
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if (sent == -1)
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{
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int err = net_error();
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printf(" errno: %d - %s\n", err, net_error_string(err));
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}
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}
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void debug_sendq_recv(struct user* user, int received, int max, const char* buffer)
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{
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printf("RECV: %d/%d bytes\n", received, (int) max);
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if (received == -1)
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{
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int err = net_error();
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printf(" errno: %d - %s\n", err, net_error_string(err));
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}
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else if (received > 0)
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{
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char* data = hub_malloc_zero(received + 1);
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memcpy(data, buffer, received);
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printf("RECV: \"%s\"\n", data);
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hub_free(data);
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}
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}
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#endif
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int net_user_send(void* ptr, const void* buf, size_t len)
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{
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struct user* user = (struct user*) ptr;
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int ret = net_send(user->net.sd, buf, len, UHUB_SEND_SIGNAL);
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#ifdef DEBUG_SENDQ
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debug_sendq_send(user, ret, len);
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#endif
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if (ret > 0)
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{
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user_reset_last_write(user);
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}
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else if (ret == -1 && (net_error() == EWOULDBLOCK || net_error() == EINTR))
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{
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return -2;
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}
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else
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{
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// user->close_flag = quit_socket_error;
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return 0;
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}
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return ret;
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}
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#ifdef SSL_SUPPORT
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int net_user_send_ssl(void* ptr, const void* buf, size_t len)
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{
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struct user* user = (struct user*) ptr;
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int ret = SSL_write(user->net.ssl, buf, (int) len);
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#ifdef DEBUG_SENDQ
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debug_sendq_send(user, ret, len);
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#endif
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if (ret > 0)
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{
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user_reset_last_write(user);
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}
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else if (ret == -1 && net_error() == EWOULDBLOCK)
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{
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return -2;
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}
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else
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{
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// user->close_flag = quit_socket_error;
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return 0;
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}
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return ret;
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}
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#endif
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int net_user_recv(void* ptr, void* buf, size_t len)
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{
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struct user* user = (struct user*) ptr;
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int ret = net_recv(user->net.sd, buf, len, 0);
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if (ret > 0)
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{
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user_reset_last_read(user);
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}
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#ifdef DEBUG_SENDQ
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debug_sendq_recv(user, ret, len, buf);
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#endif
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return ret;
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}
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#ifdef SSL_SUPPORT
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int net_user_recv_ssl(void* ptr, void* buf, size_t len)
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{
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struct user* user = (struct user*) ptr;
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int ret = SSL_read(user->net.ssl, buf, len);
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if (ret > 0)
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{
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user_reset_last_read(user);
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}
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#ifdef DEBUG_SENDQ
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debug_sendq_recv(user, ret, len, buf);
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#endif
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return ret;
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}
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#endif
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int handle_net_read(struct user* user)
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{
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static char buf[MAX_RECV_BUF];
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struct hub_recvq* q = user->net.recv_queue;
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size_t buf_size = hub_recvq_get(q, buf, MAX_RECV_BUF);
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ssize_t size = net_user_recv(user, &buf[buf_size], MAX_RECV_BUF - buf_size);
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if (size > 0)
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buf_size += size;
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if (size == -1)
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{
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if (net_error() == EWOULDBLOCK || net_error() == EINTR)
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return 0;
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return quit_socket_error;
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}
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else if (size == 0)
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{
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return quit_disconnected;
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}
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else
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{
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char* lastPos = 0;
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char* start = buf;
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char* pos = 0;
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size_t remaining = buf_size;
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while ((pos = memchr(start, '\n', remaining)))
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{
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lastPos = pos;
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pos[0] = '\0';
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#ifdef DEBUG_SENDQ
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printf("PROC: \"%s\" (%d)\n", start, (int) (pos - start));
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#endif
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if (user_flag_get(user, flag_maxbuf))
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{
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user_flag_unset(user, flag_maxbuf);
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}
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else
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{
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if (((pos - start) > 0) && g_hub->config->max_recv_buffer > (pos - start))
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{
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if (hub_handle_message(g_hub, user, start, (pos - start)) == -1)
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{
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return quit_protocol_error;
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break;
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}
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}
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}
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pos[0] = '\n'; /* FIXME: not needed */
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pos ++;
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remaining -= (pos - start);
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start = pos;
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}
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if (lastPos)
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{
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if (remaining < g_hub->config->max_recv_buffer)
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{
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hub_recvq_set(q, lastPos, remaining);
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}
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else
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{
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hub_recvq_set(q, 0, 0);
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user_flag_set(user, flag_maxbuf);
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}
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}
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else
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{
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hub_recvq_set(q, 0, 0);
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}
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}
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return 0;
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}
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int handle_net_write(struct user* user)
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{
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while (hub_sendq_get_bytes(user->net.send_queue))
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{
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int ret = hub_sendq_send(user->net.send_queue, net_user_send, user);
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if (ret == -2)
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break;
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if (ret <= 0)
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return quit_socket_error;
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}
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if (hub_sendq_get_bytes(user->net.send_queue))
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{
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user_net_io_want_write(user);
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}
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else
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{
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user_net_io_want_read(user);
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}
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return 0;
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}
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void net_event(int fd, short ev, void *arg)
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{
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struct user* user = (struct user*) arg;
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int flag_close = 0;
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#ifdef DEBUG_SENDQ
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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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#endif
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if (ev & EV_TIMEOUT)
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{
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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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// FIXME: hub is not neccesarily set!
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// hub_send_ping(hub, user);
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}
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}
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if (ev & EV_READ)
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{
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flag_close = handle_net_read(user);
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}
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else if (ev & EV_WRITE)
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{
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flag_close = handle_net_write(user);
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}
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if (flag_close)
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{
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hub_disconnect_user(g_hub, user, flag_close);
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return;
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}
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}
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static void prepare_user_net(struct hub_info* hub, struct user* user)
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{
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int fd = user->net.sd;
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#ifdef SET_SENDBUG
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size_t sendbuf = 0;
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size_t recvbuf = 0;
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if (net_get_recvbuf_size(fd, &recvbuf) != -1)
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{
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if (recvbuf > MAX_RECV_BUF || !recvbuf) recvbuf = MAX_RECV_BUF;
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net_set_recvbuf_size(fd, recvbuf);
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}
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if (net_get_sendbuf_size(fd, &sendbuf) != -1)
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{
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if (sendbuf > MAX_SEND_BUF || !sendbuf) sendbuf = MAX_SEND_BUF;
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net_set_sendbuf_size(fd, sendbuf);
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}
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#endif
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net_set_nonblocking(fd, 1);
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net_set_nosigpipe(fd, 1);
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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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struct ip_addr_encap ipaddr;
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const char* addr;
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for (;;)
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{
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int fd = net_accept(server_fd, &ipaddr);
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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 = ip_convert_to_string(&ipaddr);
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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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memcpy(&user->net.ipaddr, &ipaddr, sizeof(ipaddr));
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prepare_user_net(hub, user);
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}
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}
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