Function pv_get_hdr_name

pvar.c:3113–3190

}

static int pv_get_hdr_name(struct sip_msg *msg,  pv_param_t *param, pv_value_t *res)
{
	int idx, idx_f;
	struct hdr_field *hf;
	char *p;
	int n;

	if(msg==NULL || res==NULL || param==NULL)
		return -1;

	/* get the index */
	if (pv_get_spec_index(msg, param, &idx, &idx_f) != 0) {
		LM_ERR("invalid index\n");
		return -1;
	}

	/* make sure we have parsed all the headers */
	if (parse_headers(msg, HDR_EOH_F, 0) <0 ) {
		LM_ERR("error parsing headers\n");
		return pv_get_null(msg, param, res);
	}

	res->flags = PV_VAL_STR;

	if (idx_f == PV_IDX_ALL) {
		/* return all header names, separated by ',' */

		p = pv_local_buf;
		hf = msg->headers;
		do {
			if (p != pv_local_buf) {
				if (p - pv_local_buf + PV_FIELD_DELIM_LEN + 1 > PV_LOCAL_BUF_SIZE) {
					LM_ERR("local buffer length exceeded\n");
					return pv_get_null(msg, param, res);
				}
				memcpy(p, PV_FIELD_DELIM, PV_FIELD_DELIM_LEN);
				p += PV_FIELD_DELIM_LEN;
			}

			if (p - pv_local_buf + hf->name.len + 1 > PV_LOCAL_BUF_SIZE) {
				LM_ERR("local buffer length exceeded!\n");
				return pv_get_null(msg, param, res);
			}
			memcpy(p, hf->name.s, hf->name.len);
			p += hf->name.len;

			hf = hf->next;
		} while (hf);

		*p = 0;
		res->rs.s = pv_local_buf;
		res->rs.len = p - pv_local_buf;
		return 0;
	}

	if (idx < 0) {
		/* negative index, translate it to a positive one */