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SIP: Add DTMF support (receive INFO only)

This commit is contained in:
Andreas Eversberg 2018-12-24 14:10:46 +01:00
parent d464cce683
commit b4154ef742
2 changed files with 67 additions and 0 deletions
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66
sip.cpp
View File

@ -2153,6 +2153,69 @@ void Psip::i_options(int status, char const *phrase, nua_t *nua, nua_magic_t *ma
nua_respond(nh, SIP_200_OK, TAG_END());
}
// code stolen from freeswitch....
static char RFC2833_CHARS[] = "0123456789*#ABCDF";
static char switch_rfc2833_to_char(int event)
{
if (event > -1 && event < (int32_t) sizeof(RFC2833_CHARS)) {
return RFC2833_CHARS[event];
}
return '\0';
}
void Psip::i_info(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tags[])
{
struct sip_inst *inst = (struct sip_inst *) p_s_sip_inst;
char digit = '\0';
PDEBUG(DEBUG_SIP, "options received\n");
// code stolen from freeswitch....
if (sip && sip->sip_content_type && sip->sip_content_type->c_type && sip->sip_content_type->c_subtype && sip->sip_payload && sip->sip_payload->pl_data) {
if (!strncasecmp(sip->sip_content_type->c_type, "application", 11) && !strcasecmp(sip->sip_content_type->c_subtype, "dtmf-relay")) {
const char *signal_ptr;
if ((signal_ptr = strstr(sip->sip_payload->pl_data, "Signal="))) {
int tmp;
/* move signal_ptr where we need it (right past Signal=) */
signal_ptr = signal_ptr + 7;
/* handle broken devices with spaces after the = (cough) VegaStream (cough) */
while (*signal_ptr && *signal_ptr == ' ')
signal_ptr++;
if (*signal_ptr
&& (*signal_ptr == '*' || *signal_ptr == '#' || *signal_ptr == 'A' || *signal_ptr == 'B' || *signal_ptr == 'C'
|| *signal_ptr == 'D')) {
digit = *signal_ptr;
} else {
tmp = atoi(signal_ptr);
digit = switch_rfc2833_to_char(tmp);
}
}
} else if (!strncasecmp(sip->sip_content_type->c_type, "application", 11) && !strcasecmp(sip->sip_content_type->c_subtype, "dtmf")) {
int tmp = atoi(sip->sip_payload->pl_data);
digit = switch_rfc2833_to_char(tmp);
}
}
sip_trace_header(this, inst->interface_name, "INFO", DIRECTION_IN);
if (digit) {
char digitstr[2] = { digit, '\0' };
struct lcr_msg *message;
add_trace("dtmf", "digit", digitstr);
message = message_create(p_serial, ACTIVE_EPOINT(p_epointlist), PORT_TO_EPOINT, MESSAGE_DTMF);
message->param.dtmf = digit;
PDEBUG(DEBUG_SIP, "Psip(%s) INFO WITH DTMF digit '%c'\n", p_name, message->param.dtmf);
message_put(message);
}
end_trace();
nua_respond(nh, SIP_200_OK, TAG_END());
}
void Psip::i_bye(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tags[])
{
struct sip_inst *inst = (struct sip_inst *) p_s_sip_inst;
@ -2560,6 +2623,9 @@ static void sip_callback(nua_event_t event, int status, char const *phrase, nua_
case nua_i_options:
psip->i_options(status, phrase, nua, magic, nh, hmagic, sip, tags);
break;
case nua_i_info:
psip->i_info(status, phrase, nua, magic, nh, hmagic, sip, tags);
break;
case nua_i_bye:
psip->i_bye(status, phrase, nua, magic, nh, hmagic, sip, tags);
break;

1
sip.h
View File

@ -34,6 +34,7 @@ class Psip : public Port
void r_cancel(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tags[]);
void r_invite(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tags[]);
void i_options(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tags[]);
void i_info(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tags[]);
void r_options(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tags[]);
void i_state(int status, char const *phrase, nua_t *nua, nua_magic_t *magic, nua_handle_t *nh, nua_hmagic_t *hmagic, sip_t const *sip, tagi_t tags[]);
void *p_s_sip_inst;