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func_hangupcause.c: Add access to Reason headers via HANGUPCAUSE()

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As soon as SIP call may end with several Reason headers, we
want to make all of them available through the HAGUPCAUSE() function.
This implementation uses the same ao2 hash for cause codes storage
and adds a flag to make difference between last processed sip
message and content of reason headers.

UserNote: Added a new option to HANGUPCAUSE to access additional
information about hangup reason. Reason headers from pjsip
could be read using 'tech_extended' cause type.
This commit is contained in:
Igor Goncharovsky
2025-09-04 10:54:27 +06:00
parent 129f90e3db
commit 4f45f21b71
5 changed files with 125 additions and 15 deletions
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24
res/res_pjsip_rfc3326.c
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@@ -38,7 +38,7 @@ static void rfc3326_use_reason_header(struct ast_sip_session *session, struct pj
{
static const pj_str_t str_reason = { "Reason", 6 };
pjsip_generic_string_hdr *header;
char buf[20];
char buf[128];
char *cause;
int code_q850 = 0, code_sip = 0;
@@ -46,9 +46,11 @@ static void rfc3326_use_reason_header(struct ast_sip_session *session, struct pj
for (; header;
header = pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &str_reason, header->next)) {
int cause_q850, cause_sip;
struct ast_control_pvt_cause_code *cause_code;
int data_size = sizeof(*cause_code);
ast_copy_pj_str(buf, &header->hvalue, sizeof(buf));
cause = ast_skip_blanks(buf);
cause_q850 = !strncasecmp(cause, "Q.850", 5);
cause_sip = !strncasecmp(cause, "SIP", 3);
if ((cause_q850 || cause_sip) && (cause = strstr(cause, "cause="))) {
@@ -56,6 +58,24 @@ static void rfc3326_use_reason_header(struct ast_sip_session *session, struct pj
if (sscanf(cause, "cause=%30d", code) != 1) {
*code = 0;
}
/* Safe */
/* Build and send the tech-specific cause information */
/* size of the string making up the cause code is "SIP " + reason length */
data_size += 4 + strlen(cause) + 1;
cause_code = ast_alloca(data_size);
memset(cause_code, 0, data_size);
ast_copy_string(cause_code->chan_name, ast_channel_name(session->channel), AST_CHANNEL_NAME);
snprintf(cause_code->code, data_size, "SIP %s", cause);
cause_code->cause_extended = 1;
if (code_q850) {
cause_code->ast_cause = *code & 0x7;
} else if (code_sip) {
cause_code->ast_cause = ast_sip_hangup_sip2cause(*code);
}
ast_queue_control_data(session->channel, AST_CONTROL_PVT_CAUSE_CODE, cause_code, data_size);
ast_channel_hangupcause_hash_set(session->channel, cause_code, data_size);
}
}