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/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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 2 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "ClientInternal.hxx"
extern "C" {
#include "fifo_buffer.h"
}
#include <assert.h>
#include <string.h>
static char *
client_read_line(struct client *client)
{
size_t length;
const char *p = (const char *)fifo_buffer_read(client->input, &length);
if (p == NULL)
return NULL;
const char *newline = (const char *)memchr(p, '\n', length);
if (newline == NULL)
return NULL;
char *line = g_strndup(p, newline - p);
fifo_buffer_consume(client->input, newline - p + 1);
return g_strchomp(line);
}
static enum command_return
client_input_received(struct client *client, size_t bytesRead)
{
char *line;
fifo_buffer_append(client->input, bytesRead);
/* process all lines */
while ((line = client_read_line(client)) != NULL) {
enum command_return ret = client_process_line(client, line);
g_free(line);
if (ret == COMMAND_RETURN_KILL ||
ret == COMMAND_RETURN_CLOSE)
return ret;
if (client_is_expired(client))
return COMMAND_RETURN_CLOSE;
}
return COMMAND_RETURN_OK;
}
enum command_return
client_read(struct client *client)
{
GError *error = NULL;
GIOStatus status;
gsize bytes_read;
assert(client != NULL);
assert(client->channel != NULL);
size_t max_length;
char *p = (char *)fifo_buffer_write(client->input, &max_length);
if (p == NULL) {
g_warning("[%u] buffer overflow", client->num);
return COMMAND_RETURN_CLOSE;
}
status = g_io_channel_read_chars(client->channel, p, max_length,
&bytes_read, &error);
switch (status) {
case G_IO_STATUS_NORMAL:
return client_input_received(client, bytes_read);
case G_IO_STATUS_AGAIN:
/* try again later, after select() */
return COMMAND_RETURN_OK;
case G_IO_STATUS_EOF:
/* peer disconnected */
return COMMAND_RETURN_CLOSE;
case G_IO_STATUS_ERROR:
/* I/O error */
g_warning("failed to read from client %d: %s",
client->num, error->message);
g_error_free(error);
return COMMAND_RETURN_CLOSE;
}
/* unreachable */
return COMMAND_RETURN_CLOSE;
}
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