Function clone_headers

parser/msg_parser.c:662–824

clones the headers list from the `from` sip_msg * into the `to` sip_msg structure */

/* clones the headers list from the `from` sip_msg
 * into the `to` sip_msg structure */
int clone_headers(struct sip_msg *from_msg, struct sip_msg *to_msg)
{
	int hdrs_no, i;
	struct hdr_field *hdrs;
	struct hdr_field *hdr;

#define link_sibling_hdr_case(_hook, _hdr_type) \
	case _hdr_type: \
		_add_last(&hdrs[i], to_msg->_hook, sibling);\
		break
#define link_hdr_case(_hook, _hdr_type) \
	case _hdr_type: \
		to_msg->_hook=&hdrs[i];\
		break

	 /*
	 * we need to duplicate the headers because the hdr->parsed field resides
	 * in shm memory, so there might be a different process that access the
	 * parsed field and find the structure parsed by the current process in
	 * pkg
	 */
	for (hdrs_no = 0, hdr = from_msg->headers; hdr; hdr = hdr->next)
		hdrs_no++;

	hdrs = pkg_malloc(hdrs_no * sizeof(struct hdr_field));
	if (!hdrs) {
		LM_ERR("could not allocate %d contact headers!\n", hdrs_no);
		return -1;
	}

	/* reset all header fields before populating new ones */
	to_msg->h_via1 = NULL;
	to_msg->callid = NULL;
	to_msg->to = NULL;
	to_msg->cseq = NULL;
	to_msg->from = NULL;
	to_msg->contact = NULL;
	to_msg->maxforwards = NULL;
	to_msg->route = NULL;
	to_msg->record_route = NULL;
	to_msg->path = NULL;
	to_msg->content_type = NULL;
	to_msg->content_length = NULL;
	to_msg->authorization = NULL;
	to_msg->expires = NULL;
	to_msg->proxy_auth = NULL;
	to_msg->supported = NULL;
	to_msg->proxy_require = NULL;
	to_msg->unsupported = NULL;
	to_msg->allow = NULL;
	to_msg->event = NULL;
	to_msg->accept = NULL;
	to_msg->accept_language = NULL;
	to_msg->organization = NULL;
	to_msg->priority = NULL;
	to_msg->subject = NULL;
	to_msg->user_agent = NULL;
	to_msg->content_disposition = NULL;