mirror of git://git.sysmocom.de/ofono
1324 lines
28 KiB
C
1324 lines
28 KiB
C
/*
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*
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* AT chat library with GLib integration
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*
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* Copyright (C) 2008-2010 Intel Corporation. All rights reserved.
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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 version 2 as
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* published by the Free Software Foundation.
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <glib.h>
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#include "ringbuffer.h"
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#include "gatchat.h"
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/* #define WRITE_SCHEDULER_DEBUG 1 */
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static const char *none_prefix[] = { NULL };
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static void g_at_chat_wakeup_writer(GAtChat *chat);
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struct at_command {
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char *cmd;
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char **prefixes;
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gboolean expect_pdu;
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guint id;
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GAtResultFunc callback;
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GAtNotifyFunc listing;
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gpointer user_data;
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GDestroyNotify notify;
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};
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struct at_notify_node {
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guint id;
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GAtNotifyFunc callback;
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gpointer user_data;
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GDestroyNotify notify;
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};
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struct at_notify {
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GSList *nodes;
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gboolean pdu;
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};
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struct _GAtChat {
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gint ref_count; /* Ref count */
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guint next_cmd_id; /* Next command id */
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guint next_notify_id; /* Next notify id */
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guint read_watch; /* GSource read id, 0 if none */
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guint write_watch; /* GSource write id, 0 if none */
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gboolean use_write_watch; /* watch usage for non blocking */
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GIOChannel *channel; /* channel */
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GQueue *command_queue; /* Command queue */
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guint cmd_bytes_written; /* bytes written from cmd */
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GHashTable *notify_list; /* List of notification reg */
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GAtDisconnectFunc user_disconnect; /* user disconnect func */
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gpointer user_disconnect_data; /* user disconnect data */
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struct ring_buffer *buf; /* Current read buffer */
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guint read_so_far; /* Number of bytes processed */
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guint max_read_attempts; /* max number of read attempts */
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GAtDebugFunc debugf; /* debugging output function */
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gpointer debug_data; /* Data to pass to debug func */
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char *pdu_notify; /* Unsolicited Resp w/ PDU */
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GSList *response_lines; /* char * lines of the response */
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char *wakeup; /* command sent to wakeup modem */
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gint timeout_source;
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gdouble inactivity_time; /* Period of inactivity */
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guint wakeup_timeout; /* How long to wait for resp */
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GTimer *wakeup_timer; /* Keep track of elapsed time */
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GAtSyntax *syntax;
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gboolean destroyed; /* Re-entrancy guard */
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GSList *terminator_list; /* Non-standard terminator */
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};
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struct terminator_info {
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char *terminator;
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int len;
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gboolean success;
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};
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static gint at_notify_node_compare_by_id(gconstpointer a, gconstpointer b)
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{
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const struct at_notify_node *node = a;
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guint id = GPOINTER_TO_UINT(b);
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if (node->id < id)
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return -1;
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if (node->id > id)
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return 1;
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return 0;
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}
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static void at_notify_node_destroy(struct at_notify_node *node)
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{
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if (node->notify)
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node->notify(node->user_data);
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g_free(node);
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}
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static void at_notify_destroy(struct at_notify *notify)
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{
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g_slist_foreach(notify->nodes, (GFunc) at_notify_node_destroy, NULL);
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g_free(notify);
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}
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static gint at_command_compare_by_id(gconstpointer a, gconstpointer b)
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{
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const struct at_command *command = a;
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guint id = GPOINTER_TO_UINT(b);
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if (command->id < id)
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return -1;
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if (command->id > id)
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return 1;
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return 0;
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}
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static struct at_command *at_command_create(const char *cmd,
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const char **prefix_list,
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gboolean expect_pdu,
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GAtNotifyFunc listing,
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GAtResultFunc func,
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gpointer user_data,
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GDestroyNotify notify,
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gboolean wakeup)
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{
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struct at_command *c;
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gsize len;
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char **prefixes = NULL;
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if (prefix_list) {
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int num_prefixes = 0;
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int i;
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while (prefix_list[num_prefixes])
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num_prefixes += 1;
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prefixes = g_new(char *, num_prefixes + 1);
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for (i = 0; i < num_prefixes; i++)
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prefixes[i] = strdup(prefix_list[i]);
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prefixes[num_prefixes] = NULL;
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}
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c = g_try_new0(struct at_command, 1);
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if (!c)
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return 0;
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len = strlen(cmd);
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c->cmd = g_try_new(char, len + 2);
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if (!c->cmd) {
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g_free(c);
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return 0;
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}
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memcpy(c->cmd, cmd, len);
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/* If we have embedded '\r' then this is a command expecting a prompt
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* from the modem. Embed Ctrl-Z at the very end automatically
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*/
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if (wakeup == FALSE) {
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if (strchr(cmd, '\r'))
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c->cmd[len] = 26;
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else
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c->cmd[len] = '\r';
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len += 1;
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}
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c->cmd[len] = '\0';
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c->expect_pdu = expect_pdu;
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c->prefixes = prefixes;
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c->callback = func;
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c->listing = listing;
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c->user_data = user_data;
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c->notify = notify;
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return c;
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}
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static void at_command_destroy(struct at_command *cmd)
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{
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if (cmd->notify)
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cmd->notify(cmd->user_data);
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g_strfreev(cmd->prefixes);
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g_free(cmd->cmd);
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g_free(cmd);
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}
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static void free_terminator(struct terminator_info *info)
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{
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g_free(info->terminator);
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info->terminator = NULL;
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g_free(info);
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info = NULL;
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}
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static void g_at_chat_cleanup(GAtChat *chat)
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{
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struct at_command *c;
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ring_buffer_free(chat->buf);
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chat->buf = NULL;
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/* Cleanup pending commands */
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while ((c = g_queue_pop_head(chat->command_queue)))
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at_command_destroy(c);
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g_queue_free(chat->command_queue);
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chat->command_queue = NULL;
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/* Cleanup any response lines we have pending */
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g_slist_foreach(chat->response_lines, (GFunc)g_free, NULL);
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g_slist_free(chat->response_lines);
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chat->response_lines = NULL;
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/* Cleanup registered notifications */
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g_hash_table_destroy(chat->notify_list);
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chat->notify_list = NULL;
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if (chat->pdu_notify) {
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g_free(chat->pdu_notify);
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chat->pdu_notify = NULL;
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}
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if (chat->wakeup) {
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g_free(chat->wakeup);
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chat->wakeup = NULL;
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}
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if (chat->wakeup_timer) {
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g_timer_destroy(chat->wakeup_timer);
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chat->wakeup_timer = 0;
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}
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if (chat->timeout_source) {
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g_source_remove(chat->timeout_source);
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chat->timeout_source = 0;
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}
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g_at_syntax_unref(chat->syntax);
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chat->syntax = NULL;
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chat->channel = NULL;
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if (chat->terminator_list) {
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g_slist_foreach(chat->terminator_list,
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(GFunc)free_terminator, NULL);
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g_slist_free(chat->terminator_list);
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chat->terminator_list = NULL;
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}
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}
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static void read_watcher_destroy_notify(GAtChat *chat)
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{
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g_at_chat_cleanup(chat);
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chat->read_watch = 0;
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if (chat->user_disconnect)
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chat->user_disconnect(chat->user_disconnect_data);
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if (chat->destroyed)
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g_free(chat);
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}
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static void write_watcher_destroy_notify(GAtChat *chat)
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{
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chat->write_watch = 0;
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}
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static void at_notify_call_callback(gpointer data, gpointer user_data)
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{
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struct at_notify_node *node = data;
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GAtResult *result = user_data;
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node->callback(result, node->user_data);
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}
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static gboolean g_at_chat_match_notify(GAtChat *chat, char *line)
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{
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GHashTableIter iter;
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struct at_notify *notify;
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gpointer key, value;
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gboolean ret = FALSE;
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GAtResult result;
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g_hash_table_iter_init(&iter, chat->notify_list);
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result.lines = 0;
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result.final_or_pdu = 0;
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while (g_hash_table_iter_next(&iter, &key, &value)) {
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notify = value;
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if (!g_str_has_prefix(line, key))
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continue;
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if (notify->pdu) {
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chat->pdu_notify = line;
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if (chat->syntax->set_hint)
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chat->syntax->set_hint(chat->syntax,
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G_AT_SYNTAX_EXPECT_PDU);
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return TRUE;
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}
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if (!result.lines)
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result.lines = g_slist_prepend(NULL, line);
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g_slist_foreach(notify->nodes, at_notify_call_callback,
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&result);
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ret = TRUE;
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}
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if (ret) {
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g_slist_free(result.lines);
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g_free(line);
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}
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return ret;
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}
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static void g_at_chat_finish_command(GAtChat *p, gboolean ok, char *final)
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{
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struct at_command *cmd = g_queue_pop_head(p->command_queue);
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GSList *response_lines;
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/* Cannot happen, but lets be paranoid */
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if (!cmd)
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return;
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p->cmd_bytes_written = 0;
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if (g_queue_peek_head(p->command_queue))
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g_at_chat_wakeup_writer(p);
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response_lines = p->response_lines;
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p->response_lines = NULL;
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if (cmd->callback) {
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GAtResult result;
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response_lines = g_slist_reverse(response_lines);
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result.final_or_pdu = final;
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result.lines = response_lines;
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cmd->callback(ok, &result, cmd->user_data);
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}
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g_slist_foreach(response_lines, (GFunc)g_free, NULL);
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g_slist_free(response_lines);
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g_free(final);
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at_command_destroy(cmd);
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}
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static struct terminator_info terminator_table[] = {
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{ "OK", -1, TRUE },
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{ "ERROR", -1, FALSE },
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{ "NO DIALTONE", -1, FALSE },
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{ "BUSY", -1, FALSE },
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{ "NO CARRIER", -1, FALSE },
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{ "CONNECT", 7, TRUE },
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{ "NO ANSWER", -1, FALSE },
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{ "+CMS ERROR:", 11, FALSE },
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{ "+CME ERROR:", 11, FALSE },
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{ "+EXT ERROR:", 11, FALSE }
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};
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void g_at_chat_add_terminator(GAtChat *chat, char *terminator,
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int len, gboolean success)
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{
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struct terminator_info *info = g_new0(struct terminator_info, 1);
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info->terminator = g_strdup(terminator);
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info->len = len;
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info->success = success;
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chat->terminator_list = g_slist_prepend(chat->terminator_list, info);
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}
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static gboolean check_terminator(struct terminator_info *info, char *line)
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{
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if (info->len == -1 && !strcmp(line, info->terminator))
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return TRUE;
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if (info->len > 0 && !strncmp(line, info->terminator, info->len))
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return TRUE;
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return FALSE;
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}
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static gboolean g_at_chat_handle_command_response(GAtChat *p,
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struct at_command *cmd,
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char *line)
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{
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int i;
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int size = sizeof(terminator_table) / sizeof(struct terminator_info);
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int hint;
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GSList *l;
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for (i = 0; i < size; i++) {
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struct terminator_info *info = &terminator_table[i];
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if (check_terminator(info, line)) {
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g_at_chat_finish_command(p, info->success, line);
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return TRUE;
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}
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}
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for (l = p->terminator_list; l; l = l->next) {
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struct terminator_info *info = l->data;
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if (check_terminator(info, line)) {
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g_at_chat_finish_command(p, info->success, line);
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return TRUE;
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}
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}
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if (cmd->prefixes) {
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int i;
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for (i = 0; cmd->prefixes[i]; i++)
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if (g_str_has_prefix(line, cmd->prefixes[i]))
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goto out;
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return FALSE;
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}
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out:
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if (cmd->listing && cmd->expect_pdu)
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hint = G_AT_SYNTAX_EXPECT_PDU;
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else
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hint = G_AT_SYNTAX_EXPECT_MULTILINE;
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if (p->syntax->set_hint)
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p->syntax->set_hint(p->syntax, hint);
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if (cmd->listing && cmd->expect_pdu) {
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p->pdu_notify = line;
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return TRUE;
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}
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if (cmd->listing) {
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GAtResult result;
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result.lines = g_slist_prepend(NULL, line);
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result.final_or_pdu = NULL;
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cmd->listing(&result, cmd->user_data);
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g_slist_free(result.lines);
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g_free(line);
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} else
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p->response_lines = g_slist_prepend(p->response_lines, line);
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return TRUE;
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}
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static void have_line(GAtChat *p, char *str)
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{
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/* We're not going to copy terminal <CR><LF> */
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struct at_command *cmd;
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if (!str)
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return;
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|
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/* Check for echo, this should not happen, but lets be paranoid */
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if (!strncmp(str, "AT", 2) == TRUE)
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goto done;
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cmd = g_queue_peek_head(p->command_queue);
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if (cmd && p->cmd_bytes_written > 0) {
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char c = cmd->cmd[p->cmd_bytes_written - 1];
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|
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/* We check that we have submitted a terminator, in which case
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* a command might have failed or completed successfully
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*
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* In the generic case, \r is at the end of the command, so we
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* know the entire command has been submitted. In the case of
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* commands like CMGS, every \r or Ctrl-Z might result in a
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* final response from the modem, so we check this as well.
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*/
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if ((c == '\r' || c == 26) &&
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g_at_chat_handle_command_response(p, cmd, str))
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return;
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}
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|
|
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if (g_at_chat_match_notify(p, str) == TRUE)
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return;
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done:
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/* No matches & no commands active, ignore line */
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g_free(str);
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}
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|
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static void have_notify_pdu(GAtChat *p, char *pdu, GAtResult *result)
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{
|
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GHashTableIter iter;
|
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struct at_notify *notify;
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char *prefix;
|
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gpointer key, value;
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g_hash_table_iter_init(&iter, p->notify_list);
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while (g_hash_table_iter_next(&iter, &key, &value)) {
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prefix = key;
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notify = value;
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|
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if (!g_str_has_prefix(p->pdu_notify, prefix))
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continue;
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|
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if (!notify->pdu)
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continue;
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|
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g_slist_foreach(notify->nodes, at_notify_call_callback, result);
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}
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}
|
|
|
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static void have_pdu(GAtChat *p, char *pdu)
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{
|
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struct at_command *cmd;
|
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GAtResult result;
|
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gboolean listing_pdu = FALSE;
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|
|
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if (!pdu)
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goto error;
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|
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result.lines = g_slist_prepend(NULL, p->pdu_notify);
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result.final_or_pdu = pdu;
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|
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cmd = g_queue_peek_head(p->command_queue);
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|
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if (cmd && cmd->expect_pdu && p->cmd_bytes_written > 0) {
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char c = cmd->cmd[p->cmd_bytes_written - 1];
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|
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if (c == '\r')
|
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listing_pdu = TRUE;
|
|
}
|
|
|
|
if (listing_pdu) {
|
|
cmd->listing(&result, cmd->user_data);
|
|
|
|
if (p->syntax->set_hint)
|
|
p->syntax->set_hint(p->syntax,
|
|
G_AT_SYNTAX_EXPECT_MULTILINE);
|
|
} else
|
|
have_notify_pdu(p, pdu, &result);
|
|
|
|
g_slist_free(result.lines);
|
|
|
|
error:
|
|
g_free(p->pdu_notify);
|
|
p->pdu_notify = NULL;
|
|
|
|
if (pdu)
|
|
g_free(pdu);
|
|
}
|
|
|
|
static char *extract_line(GAtChat *p)
|
|
{
|
|
unsigned int wrap = ring_buffer_len_no_wrap(p->buf);
|
|
unsigned int pos = 0;
|
|
unsigned char *buf = ring_buffer_read_ptr(p->buf, pos);
|
|
int strip_front = 0;
|
|
int line_length = 0;
|
|
char *line;
|
|
|
|
while (pos < p->read_so_far) {
|
|
if (*buf == '\r' || *buf == '\n')
|
|
if (!line_length)
|
|
strip_front += 1;
|
|
else
|
|
break;
|
|
else
|
|
line_length += 1;
|
|
|
|
buf += 1;
|
|
pos += 1;
|
|
|
|
if (pos == wrap)
|
|
buf = ring_buffer_read_ptr(p->buf, pos);
|
|
}
|
|
|
|
line = g_try_new(char, line_length + 1);
|
|
if (!line) {
|
|
ring_buffer_drain(p->buf, p->read_so_far);
|
|
return NULL;
|
|
}
|
|
|
|
ring_buffer_drain(p->buf, strip_front);
|
|
ring_buffer_read(p->buf, line, line_length);
|
|
ring_buffer_drain(p->buf, p->read_so_far - strip_front - line_length);
|
|
|
|
line[line_length] = '\0';
|
|
|
|
return line;
|
|
}
|
|
|
|
static void new_bytes(GAtChat *p)
|
|
{
|
|
unsigned int len = ring_buffer_len(p->buf);
|
|
unsigned int wrap = ring_buffer_len_no_wrap(p->buf);
|
|
unsigned char *buf = ring_buffer_read_ptr(p->buf, p->read_so_far);
|
|
|
|
GAtSyntaxResult result;
|
|
|
|
g_at_chat_ref(p);
|
|
|
|
while (p->channel && (p->read_so_far < len)) {
|
|
gsize rbytes = MIN(len - p->read_so_far, wrap - p->read_so_far);
|
|
result = p->syntax->feed(p->syntax, (char *)buf, &rbytes);
|
|
|
|
buf += rbytes;
|
|
p->read_so_far += rbytes;
|
|
|
|
if (p->read_so_far == wrap) {
|
|
buf = ring_buffer_read_ptr(p->buf, p->read_so_far);
|
|
wrap = len;
|
|
}
|
|
|
|
if (result == G_AT_SYNTAX_RESULT_UNSURE)
|
|
continue;
|
|
|
|
switch (result) {
|
|
case G_AT_SYNTAX_RESULT_LINE:
|
|
case G_AT_SYNTAX_RESULT_MULTILINE:
|
|
have_line(p, extract_line(p));
|
|
break;
|
|
|
|
case G_AT_SYNTAX_RESULT_PDU:
|
|
have_pdu(p, extract_line(p));
|
|
break;
|
|
|
|
case G_AT_SYNTAX_RESULT_PROMPT:
|
|
g_at_chat_wakeup_writer(p);
|
|
ring_buffer_drain(p->buf, p->read_so_far);
|
|
break;
|
|
|
|
default:
|
|
ring_buffer_drain(p->buf, p->read_so_far);
|
|
break;
|
|
}
|
|
|
|
len -= p->read_so_far;
|
|
wrap -= p->read_so_far;
|
|
p->read_so_far = 0;
|
|
}
|
|
|
|
/* We're overflowing the buffer, shutdown the socket */
|
|
if (p->buf && ring_buffer_avail(p->buf) == 0)
|
|
g_source_remove(p->read_watch);
|
|
|
|
g_at_chat_unref(p);
|
|
}
|
|
|
|
static gboolean received_data(GIOChannel *channel, GIOCondition cond,
|
|
gpointer data)
|
|
{
|
|
unsigned char *buf;
|
|
GAtChat *chat = data;
|
|
GIOError err;
|
|
gsize rbytes;
|
|
gsize toread;
|
|
gsize total_read = 0;
|
|
guint read_count = 0;
|
|
|
|
if (cond & G_IO_NVAL)
|
|
return FALSE;
|
|
|
|
/* Regardless of condition, try to read all the data available */
|
|
do {
|
|
toread = ring_buffer_avail_no_wrap(chat->buf);
|
|
|
|
if (toread == 0)
|
|
break;
|
|
|
|
rbytes = 0;
|
|
buf = ring_buffer_write_ptr(chat->buf);
|
|
|
|
err = g_io_channel_read(channel, (char *) buf, toread, &rbytes);
|
|
g_at_util_debug_chat(TRUE, (char *)buf, rbytes,
|
|
chat->debugf, chat->debug_data);
|
|
|
|
read_count++;
|
|
|
|
total_read += rbytes;
|
|
|
|
if (rbytes > 0)
|
|
ring_buffer_write_advance(chat->buf, rbytes);
|
|
|
|
} while (err == G_IO_ERROR_NONE && rbytes > 0 &&
|
|
read_count < chat->max_read_attempts);
|
|
|
|
if (total_read > 0)
|
|
new_bytes(chat);
|
|
|
|
if (cond & (G_IO_HUP | G_IO_ERR))
|
|
return FALSE;
|
|
|
|
if (read_count > 0 && rbytes == 0 && err != G_IO_ERROR_AGAIN)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void wakeup_cb(gboolean ok, GAtResult *result, gpointer user_data)
|
|
{
|
|
GAtChat *chat = user_data;
|
|
|
|
if (ok == FALSE)
|
|
return;
|
|
|
|
if (chat->debugf)
|
|
chat->debugf("Finally woke up the modem\n", chat->debug_data);
|
|
|
|
g_source_remove(chat->timeout_source);
|
|
chat->timeout_source = 0;
|
|
}
|
|
|
|
static gboolean wakeup_no_response(gpointer user)
|
|
{
|
|
GAtChat *chat = user;
|
|
struct at_command *cmd = g_queue_peek_head(chat->command_queue);
|
|
|
|
if (chat->debugf)
|
|
chat->debugf("Wakeup got no response\n", chat->debug_data);
|
|
|
|
if (cmd == NULL)
|
|
return FALSE;
|
|
|
|
g_at_chat_finish_command(chat, FALSE, NULL);
|
|
cmd = at_command_create(chat->wakeup, none_prefix, FALSE,
|
|
NULL, wakeup_cb, chat, NULL, TRUE);
|
|
|
|
if (!cmd) {
|
|
chat->timeout_source = 0;
|
|
return FALSE;
|
|
}
|
|
|
|
g_queue_push_head(chat->command_queue, cmd);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean can_write_data(GIOChannel *channel, GIOCondition cond,
|
|
gpointer data)
|
|
{
|
|
GAtChat *chat = data;
|
|
struct at_command *cmd;
|
|
GIOError err;
|
|
gsize bytes_written;
|
|
gsize towrite;
|
|
gsize len;
|
|
char *cr;
|
|
gboolean wakeup_first = FALSE;
|
|
#ifdef WRITE_SCHEDULER_DEBUG
|
|
int limiter;
|
|
#endif
|
|
|
|
if (cond & (G_IO_NVAL | G_IO_HUP | G_IO_ERR))
|
|
return FALSE;
|
|
|
|
/* Grab the first command off the queue and write as
|
|
* much of it as we can
|
|
*/
|
|
cmd = g_queue_peek_head(chat->command_queue);
|
|
|
|
/* For some reason command queue is empty, cancel write watcher */
|
|
if (cmd == NULL)
|
|
return FALSE;
|
|
|
|
len = strlen(cmd->cmd);
|
|
|
|
/* For some reason write watcher fired, but we've already
|
|
* written the entire command out to the io channel,
|
|
* cancel write watcher
|
|
*/
|
|
if (chat->cmd_bytes_written >= len)
|
|
return FALSE;
|
|
|
|
if (chat->wakeup) {
|
|
if (!chat->wakeup_timer) {
|
|
wakeup_first = TRUE;
|
|
chat->wakeup_timer = g_timer_new();
|
|
|
|
} else if (g_timer_elapsed(chat->wakeup_timer, NULL) >
|
|
chat->inactivity_time)
|
|
wakeup_first = TRUE;
|
|
}
|
|
|
|
if (chat->cmd_bytes_written == 0 && wakeup_first == TRUE) {
|
|
cmd = at_command_create(chat->wakeup, none_prefix, FALSE,
|
|
NULL, wakeup_cb, chat, NULL, TRUE);
|
|
|
|
if (!cmd)
|
|
return FALSE;
|
|
|
|
g_queue_push_head(chat->command_queue, cmd);
|
|
|
|
len = strlen(chat->wakeup);
|
|
|
|
chat->timeout_source = g_timeout_add(chat->wakeup_timeout,
|
|
wakeup_no_response, chat);
|
|
}
|
|
|
|
towrite = len - chat->cmd_bytes_written;
|
|
|
|
cr = strchr(cmd->cmd + chat->cmd_bytes_written, '\r');
|
|
|
|
if (cr)
|
|
towrite = cr - (cmd->cmd + chat->cmd_bytes_written) + 1;
|
|
|
|
#ifdef WRITE_SCHEDULER_DEBUG
|
|
limiter = towrite;
|
|
|
|
if (limiter > 5)
|
|
limiter = 5;
|
|
#endif
|
|
|
|
err = g_io_channel_write(chat->channel,
|
|
cmd->cmd + chat->cmd_bytes_written,
|
|
#ifdef WRITE_SCHEDULER_DEBUG
|
|
limiter,
|
|
#else
|
|
towrite,
|
|
#endif
|
|
&bytes_written);
|
|
|
|
if (err != G_IO_ERROR_NONE) {
|
|
g_source_remove(chat->read_watch);
|
|
return FALSE;
|
|
}
|
|
|
|
g_at_util_debug_chat(FALSE, cmd->cmd + chat->cmd_bytes_written,
|
|
bytes_written, chat->debugf, chat->debug_data);
|
|
chat->cmd_bytes_written += bytes_written;
|
|
|
|
if (bytes_written < towrite)
|
|
return TRUE;
|
|
|
|
/* Full command submitted, update timer */
|
|
if (chat->wakeup_timer)
|
|
g_timer_start(chat->wakeup_timer);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void g_at_chat_wakeup_writer(GAtChat *chat)
|
|
{
|
|
if (chat->write_watch != 0)
|
|
return;
|
|
|
|
if (chat->use_write_watch == TRUE) {
|
|
chat->write_watch = g_io_add_watch_full(chat->channel,
|
|
G_PRIORITY_DEFAULT,
|
|
G_IO_OUT | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
|
|
can_write_data, chat,
|
|
(GDestroyNotify)write_watcher_destroy_notify);
|
|
} else {
|
|
while (can_write_data(chat->channel, G_IO_OUT, chat) == TRUE);
|
|
write_watcher_destroy_notify(chat);
|
|
}
|
|
}
|
|
|
|
static GAtChat *create_chat(GIOChannel *channel, GIOFlags flags,
|
|
GAtSyntax *syntax)
|
|
{
|
|
GAtChat *chat;
|
|
|
|
if (!channel)
|
|
return NULL;
|
|
|
|
if (!syntax)
|
|
return NULL;
|
|
|
|
chat = g_try_new0(GAtChat, 1);
|
|
if (!chat)
|
|
return chat;
|
|
|
|
chat->ref_count = 1;
|
|
chat->next_cmd_id = 1;
|
|
chat->next_notify_id = 1;
|
|
chat->debugf = NULL;
|
|
|
|
if (flags & G_IO_FLAG_NONBLOCK) {
|
|
chat->use_write_watch = TRUE;
|
|
chat->max_read_attempts = 3;
|
|
} else {
|
|
chat->use_write_watch = FALSE;
|
|
chat->max_read_attempts = 1;
|
|
}
|
|
|
|
chat->buf = ring_buffer_new(4096);
|
|
|
|
if (!chat->buf)
|
|
goto error;
|
|
|
|
chat->command_queue = g_queue_new();
|
|
|
|
if (!chat->command_queue)
|
|
goto error;
|
|
|
|
chat->notify_list = g_hash_table_new_full(g_str_hash, g_str_equal,
|
|
g_free, (GDestroyNotify)at_notify_destroy);
|
|
|
|
if (!g_at_util_setup_io(channel, flags))
|
|
goto error;
|
|
|
|
chat->channel = channel;
|
|
chat->read_watch = g_io_add_watch_full(channel, G_PRIORITY_DEFAULT,
|
|
G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
|
|
received_data, chat,
|
|
(GDestroyNotify)read_watcher_destroy_notify);
|
|
|
|
chat->syntax = g_at_syntax_ref(syntax);
|
|
|
|
return chat;
|
|
|
|
error:
|
|
if (chat->buf)
|
|
ring_buffer_free(chat->buf);
|
|
|
|
if (chat->command_queue)
|
|
g_queue_free(chat->command_queue);
|
|
|
|
if (chat->notify_list)
|
|
g_hash_table_destroy(chat->notify_list);
|
|
|
|
g_free(chat);
|
|
return NULL;
|
|
}
|
|
|
|
GAtChat *g_at_chat_new(GIOChannel *channel, GAtSyntax *syntax)
|
|
{
|
|
return create_chat(channel, G_IO_FLAG_NONBLOCK, syntax);
|
|
}
|
|
|
|
GAtChat *g_at_chat_new_blocking(GIOChannel *channel, GAtSyntax *syntax)
|
|
{
|
|
return create_chat(channel, 0, syntax);
|
|
}
|
|
|
|
GIOChannel *g_at_chat_get_channel(GAtChat *chat)
|
|
{
|
|
if (chat == NULL)
|
|
return NULL;
|
|
|
|
return chat->channel;
|
|
}
|
|
|
|
GAtChat *g_at_chat_ref(GAtChat *chat)
|
|
{
|
|
if (chat == NULL)
|
|
return NULL;
|
|
|
|
g_atomic_int_inc(&chat->ref_count);
|
|
|
|
return chat;
|
|
}
|
|
|
|
void g_at_chat_unref(GAtChat *chat)
|
|
{
|
|
gboolean is_zero;
|
|
|
|
if (chat == NULL)
|
|
return;
|
|
|
|
is_zero = g_atomic_int_dec_and_test(&chat->ref_count);
|
|
|
|
if (is_zero == FALSE)
|
|
return;
|
|
|
|
g_at_chat_shutdown(chat);
|
|
|
|
/* glib delays the destruction of the watcher until it exits, this
|
|
* means we can't free the data just yet, even though we've been
|
|
* destroyed already. We have to wait until the read_watcher
|
|
* destroy function gets called
|
|
*/
|
|
if (chat->read_watch != 0)
|
|
chat->destroyed = TRUE;
|
|
else
|
|
g_free(chat);
|
|
}
|
|
|
|
gboolean g_at_chat_shutdown(GAtChat *chat)
|
|
{
|
|
if (chat->channel == NULL)
|
|
return FALSE;
|
|
|
|
/* Don't trigger user disconnect on shutdown */
|
|
chat->user_disconnect = NULL;
|
|
chat->user_disconnect_data = NULL;
|
|
|
|
if (chat->read_watch)
|
|
g_source_remove(chat->read_watch);
|
|
|
|
if (chat->write_watch)
|
|
g_source_remove(chat->write_watch);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean g_at_chat_set_syntax(GAtChat *chat, GAtSyntax *syntax)
|
|
{
|
|
if (chat == NULL)
|
|
return FALSE;
|
|
|
|
g_at_syntax_unref(chat->syntax);
|
|
|
|
chat->syntax = g_at_syntax_ref(syntax);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean g_at_chat_set_disconnect_function(GAtChat *chat,
|
|
GAtDisconnectFunc disconnect, gpointer user_data)
|
|
{
|
|
if (chat == NULL)
|
|
return FALSE;
|
|
|
|
chat->user_disconnect = disconnect;
|
|
chat->user_disconnect_data = user_data;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean g_at_chat_set_debug(GAtChat *chat, GAtDebugFunc func, gpointer user)
|
|
{
|
|
if (chat == NULL)
|
|
return FALSE;
|
|
|
|
chat->debugf = func;
|
|
chat->debug_data = user;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static guint send_common(GAtChat *chat, const char *cmd,
|
|
const char **prefix_list,
|
|
gboolean expect_pdu,
|
|
GAtNotifyFunc listing, GAtResultFunc func,
|
|
gpointer user_data, GDestroyNotify notify)
|
|
{
|
|
struct at_command *c;
|
|
|
|
if (chat == NULL || chat->command_queue == NULL)
|
|
return 0;
|
|
|
|
c = at_command_create(cmd, prefix_list, expect_pdu, listing, func,
|
|
user_data, notify, FALSE);
|
|
|
|
if (!c)
|
|
return 0;
|
|
|
|
c->id = chat->next_cmd_id++;
|
|
|
|
g_queue_push_tail(chat->command_queue, c);
|
|
|
|
if (g_queue_get_length(chat->command_queue) == 1)
|
|
g_at_chat_wakeup_writer(chat);
|
|
|
|
return c->id;
|
|
}
|
|
|
|
guint g_at_chat_send(GAtChat *chat, const char *cmd,
|
|
const char **prefix_list, GAtResultFunc func,
|
|
gpointer user_data, GDestroyNotify notify)
|
|
{
|
|
return send_common(chat, cmd, prefix_list, FALSE, NULL, func,
|
|
user_data, notify);
|
|
}
|
|
|
|
guint g_at_chat_send_listing(GAtChat *chat, const char *cmd,
|
|
const char **prefix_list,
|
|
GAtNotifyFunc listing, GAtResultFunc func,
|
|
gpointer user_data, GDestroyNotify notify)
|
|
{
|
|
if (listing == NULL)
|
|
return 0;
|
|
|
|
return send_common(chat, cmd, prefix_list, FALSE, listing, func,
|
|
user_data, notify);
|
|
}
|
|
|
|
guint g_at_chat_send_pdu_listing(GAtChat *chat, const char *cmd,
|
|
const char **prefix_list,
|
|
GAtNotifyFunc listing, GAtResultFunc func,
|
|
gpointer user_data, GDestroyNotify notify)
|
|
{
|
|
if (listing == NULL)
|
|
return 0;
|
|
|
|
return send_common(chat, cmd, prefix_list, TRUE, listing, func,
|
|
user_data, notify);
|
|
}
|
|
|
|
gboolean g_at_chat_cancel(GAtChat *chat, guint id)
|
|
{
|
|
GList *l;
|
|
|
|
if (chat == NULL || chat->command_queue == NULL)
|
|
return FALSE;
|
|
|
|
/* We use id 0 for wakeup commands */
|
|
if (id == 0)
|
|
return FALSE;
|
|
|
|
l = g_queue_find_custom(chat->command_queue, GUINT_TO_POINTER(id),
|
|
at_command_compare_by_id);
|
|
|
|
if (!l)
|
|
return FALSE;
|
|
|
|
if (l == g_queue_peek_head(chat->command_queue) &&
|
|
chat->cmd_bytes_written > 0) {
|
|
struct at_command *c = l->data;
|
|
|
|
/* We can't actually remove it since it is most likely
|
|
* already in progress, just null out the callback
|
|
* so it won't be called
|
|
*/
|
|
c->callback = NULL;
|
|
} else {
|
|
at_command_destroy(l->data);
|
|
g_queue_remove(chat->command_queue, l->data);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean g_at_chat_cancel_all(GAtChat *chat)
|
|
{
|
|
int n = 0;
|
|
struct at_command *c;
|
|
|
|
if (chat == NULL || chat->command_queue == NULL)
|
|
return FALSE;
|
|
|
|
while ((c = g_queue_peek_nth(chat->command_queue, n)) != NULL) {
|
|
if (c->id == 0) {
|
|
n += 1;
|
|
continue;
|
|
}
|
|
|
|
if (n == 0 && chat->cmd_bytes_written > 0) {
|
|
c->callback = NULL;
|
|
n += 1;
|
|
continue;
|
|
}
|
|
|
|
at_command_destroy(c);
|
|
g_queue_remove(chat->command_queue, c);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static struct at_notify *at_notify_create(GAtChat *chat, const char *prefix,
|
|
gboolean pdu)
|
|
{
|
|
struct at_notify *notify;
|
|
char *key;
|
|
|
|
key = g_strdup(prefix);
|
|
|
|
if (!key)
|
|
return 0;
|
|
|
|
notify = g_try_new0(struct at_notify, 1);
|
|
if (!notify) {
|
|
g_free(key);
|
|
return 0;
|
|
}
|
|
|
|
notify->pdu = pdu;
|
|
|
|
g_hash_table_insert(chat->notify_list, key, notify);
|
|
|
|
return notify;
|
|
}
|
|
|
|
guint g_at_chat_register(GAtChat *chat, const char *prefix,
|
|
GAtNotifyFunc func, gboolean expect_pdu,
|
|
gpointer user_data,
|
|
GDestroyNotify destroy_notify)
|
|
{
|
|
struct at_notify *notify;
|
|
struct at_notify_node *node;
|
|
|
|
if (chat == NULL || chat->notify_list == NULL)
|
|
return 0;
|
|
|
|
if (func == NULL)
|
|
return 0;
|
|
|
|
if (prefix == NULL || strlen(prefix) == 0)
|
|
return 0;
|
|
|
|
notify = g_hash_table_lookup(chat->notify_list, prefix);
|
|
|
|
if (!notify)
|
|
notify = at_notify_create(chat, prefix, expect_pdu);
|
|
|
|
if (!notify || notify->pdu != expect_pdu)
|
|
return 0;
|
|
|
|
node = g_try_new0(struct at_notify_node, 1);
|
|
if (!node)
|
|
return 0;
|
|
|
|
node->id = chat->next_notify_id++;
|
|
node->callback = func;
|
|
node->user_data = user_data;
|
|
node->notify = destroy_notify;
|
|
|
|
notify->nodes = g_slist_prepend(notify->nodes, node);
|
|
|
|
return node->id;
|
|
}
|
|
|
|
gboolean g_at_chat_unregister(GAtChat *chat, guint id)
|
|
{
|
|
GHashTableIter iter;
|
|
struct at_notify *notify;
|
|
gpointer key, value;
|
|
GSList *l;
|
|
|
|
if (chat == NULL || chat->notify_list == NULL)
|
|
return FALSE;
|
|
|
|
g_hash_table_iter_init(&iter, chat->notify_list);
|
|
|
|
while (g_hash_table_iter_next(&iter, &key, &value)) {
|
|
notify = value;
|
|
|
|
l = g_slist_find_custom(notify->nodes, GUINT_TO_POINTER(id),
|
|
at_notify_node_compare_by_id);
|
|
|
|
if (!l)
|
|
continue;
|
|
|
|
at_notify_node_destroy(l->data);
|
|
notify->nodes = g_slist_remove(notify->nodes, l->data);
|
|
|
|
if (notify->nodes == NULL)
|
|
g_hash_table_iter_remove(&iter);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean g_at_chat_unregister_all(GAtChat *chat)
|
|
{
|
|
GHashTableIter iter;
|
|
struct at_notify *notify;
|
|
gpointer key, value;
|
|
GSList *l;
|
|
|
|
if (chat == NULL || chat->notify_list == NULL)
|
|
return FALSE;
|
|
|
|
g_hash_table_iter_init(&iter, chat->notify_list);
|
|
|
|
while (g_hash_table_iter_next(&iter, &key, &value)) {
|
|
notify = value;
|
|
|
|
for (l = notify->nodes; l; l = l->next)
|
|
at_notify_node_destroy(l->data);
|
|
|
|
g_slist_free(notify->nodes);
|
|
notify->nodes = NULL;
|
|
g_hash_table_iter_remove(&iter);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean g_at_chat_set_wakeup_command(GAtChat *chat, const char *cmd,
|
|
unsigned int timeout, unsigned int msec)
|
|
{
|
|
if (chat == NULL)
|
|
return FALSE;
|
|
|
|
if (chat->wakeup)
|
|
g_free(chat->wakeup);
|
|
|
|
chat->wakeup = g_strdup(cmd);
|
|
chat->inactivity_time = (gdouble)msec / 1000;
|
|
chat->wakeup_timeout = timeout;
|
|
|
|
return TRUE;
|
|
}
|