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chan_websocket.c: Add DTMF messages

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Added DTMF messages to the chan_websocket feature.

When a user presses DTMF during a call over chan_websocket it will send a message like:
"DTMF_END digit:1"

Resolves: https://github.com/asterisk/asterisk-feature-requests/issues/70
(cherry picked from commit 8dbf144e16)
This commit is contained in:
Joe Garlick
2025-09-04 12:20:35 +00:00
committed by George Joseph
parent 1833da0a9c
commit 0238635847
1 changed files with 29 additions and 0 deletions
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29
channels/chan_websocket.c
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@@ -156,6 +156,7 @@ struct websocket_pvt {
#define QUEUE_DRAINED "QUEUE_DRAINED"
#define DRIVER_STATUS "STATUS"
#define MEDIA_BUFFERING_COMPLETED "MEDIA_BUFFERING_COMPLETED"
#define DTMF_END "DTMF_END"
#define QUEUE_LENGTH_MAX 1000
#define QUEUE_LENGTH_XOFF_LEVEL 900
@@ -168,6 +169,7 @@ static int webchan_call(struct ast_channel *ast, const char *dest, int timeout);
static struct ast_frame *webchan_read(struct ast_channel *ast);
static int webchan_write(struct ast_channel *ast, struct ast_frame *f);
static int webchan_hangup(struct ast_channel *ast);
static int webchan_send_dtmf_text(struct ast_channel *ast, char digit, unsigned int duration);
static struct ast_channel_tech websocket_tech = {
.type = "WebSocket",
@@ -177,6 +179,7 @@ static struct ast_channel_tech websocket_tech = {
.read = webchan_read,
.write = webchan_write,
.hangup = webchan_hangup,
.send_digit_end = webchan_send_dtmf_text,
};
static void set_channel_format(struct websocket_pvt * instance,
@@ -1410,6 +1413,32 @@ static int webchan_hangup(struct ast_channel *ast)
return 0;
}
static int webchan_send_dtmf_text(struct ast_channel *ast, char digit, unsigned int duration)
{
struct websocket_pvt *instance = ast_channel_tech_pvt(ast);
char *command;
int res = 0;
if (!instance) {
return -1;
}
res = ast_asprintf(&command, "%s digit:%c", DTMF_END, digit);
if (res <= 0 || !command) {
ast_log(LOG_ERROR, "%s: Failed to create DTMF_END\n", ast_channel_name(instance->channel));
return 0;
}
res = ast_websocket_write_string(instance->websocket, command);
if (res != 0) {
ast_log(LOG_ERROR, "%s: Failed to send DTMF_END\n", ast_channel_name(instance->channel));
ast_free(command);
return 0;
}
ast_debug(3, "%s: Sent %s\n", ast_channel_name(instance->channel), command);
ast_free(command);
return 0;
}
/*!
* \internal
*