114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
/*
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* Copyright (C) 2003-2011 The Music Player Daemon Project
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* http://www.musicpd.org
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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 2 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "client_internal.h"
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#include "fifo_buffer.h"
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#include <assert.h>
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#include <string.h>
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static char *
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client_read_line(struct client *client)
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{
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const char *p, *newline;
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size_t length;
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char *line;
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p = fifo_buffer_read(client->input, &length);
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if (p == NULL)
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return NULL;
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newline = memchr(p, '\n', length);
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if (newline == NULL)
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return NULL;
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line = g_strndup(p, newline - p);
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fifo_buffer_consume(client->input, newline - p + 1);
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return g_strchomp(line);
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}
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static enum command_return
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client_input_received(struct client *client, size_t bytesRead)
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{
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char *line;
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fifo_buffer_append(client->input, bytesRead);
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/* process all lines */
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while ((line = client_read_line(client)) != NULL) {
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enum command_return ret = client_process_line(client, line);
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g_free(line);
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if (ret == COMMAND_RETURN_KILL ||
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ret == COMMAND_RETURN_CLOSE)
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return ret;
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if (client_is_expired(client))
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return COMMAND_RETURN_CLOSE;
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}
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return COMMAND_RETURN_OK;
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}
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enum command_return
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client_read(struct client *client)
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{
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char *p;
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size_t max_length;
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GError *error = NULL;
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GIOStatus status;
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gsize bytes_read;
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assert(client != NULL);
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assert(client->channel != NULL);
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p = fifo_buffer_write(client->input, &max_length);
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if (p == NULL) {
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g_warning("[%u] buffer overflow", client->num);
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return COMMAND_RETURN_CLOSE;
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}
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status = g_io_channel_read_chars(client->channel, p, max_length,
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&bytes_read, &error);
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switch (status) {
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case G_IO_STATUS_NORMAL:
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return client_input_received(client, bytes_read);
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case G_IO_STATUS_AGAIN:
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/* try again later, after select() */
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return COMMAND_RETURN_OK;
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case G_IO_STATUS_EOF:
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/* peer disconnected */
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return COMMAND_RETURN_CLOSE;
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case G_IO_STATUS_ERROR:
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/* I/O error */
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g_warning("failed to read from client %d: %s",
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client->num, error->message);
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g_error_free(error);
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return COMMAND_RETURN_CLOSE;
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}
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/* unreachable */
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return COMMAND_RETURN_CLOSE;
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}
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