Function insert_path_as_route

msg_translator.c:2066–2117

#define ROUTE_STR  "Route: "
#define ROUTE_LEN  (sizeof(ROUTE_STR)-1)
static inline int insert_path_as_route(struct sip_msg* msg, str* path)
{
	struct lump *anchor;
	char *route;
	struct hdr_field *hf, *last_via=0;

	for (hf = msg->headers; hf; hf = hf->next) {
		if (hf->type == HDR_ROUTE_T) {
			break;
		} else if (hf->type == HDR_VIA_T) {
			last_via = hf;
		}
	}
	if (hf) {
		/* Route HF found, insert before it */
		anchor = anchor_lump(msg, hf->name.s - msg->buf, 0);
	} else if(last_via) {
		if (last_via->next) {
			/* Via HF in between, insert after it */
			anchor = anchor_lump(msg, last_via->next->name.s - msg->buf, 0);
		} else {
			/* Via HF is last, so append */
			anchor = anchor_lump(msg, msg->unparsed - msg->buf, 0);
		}
	} else {
		/* None of the above, insert as first */
		anchor = anchor_lump(msg, msg->headers->name.s - msg->buf, 0);
	}

	if (anchor == 0) {
		LM_ERR("failed to get anchor\n");
		return -1;
	}

	route = pkg_malloc(ROUTE_LEN + path->len + CRLF_LEN);
	if (!route) {
		LM_ERR("out of pkg memory\n");
		return -1;
	}
	memcpy(route, ROUTE_STR, ROUTE_LEN);
	memcpy(route + ROUTE_LEN, path->s, path->len);
	memcpy(route + ROUTE_LEN + path->len, CRLF, CRLF_LEN);

	if (insert_new_lump_before(anchor, route, ROUTE_LEN + path->len + CRLF_LEN, 0) == 0) {
		LM_ERR("failed to insert lump\n");
		return -1;
	}

	msg->msg_flags |= FL_HAS_ROUTE_LUMP;

	return 0;
}

int is_del_via1_lump(struct sip_msg* msg)
{