1387     uint8_t *xtn_hdr_data = ((uint8_t *)xtn_hdr) + octets_in_rtp_extn_hdr;  in srtp_process_header_encryption()  local
1389         xtn_hdr_data + (ntohs(xtn_hdr->length) * sizeof(uint32_t));  in srtp_process_header_encryption()
1393         while (xtn_hdr_data < xtn_hdr_end) {  in srtp_process_header_encryption()
1394             uint8_t xid = (*xtn_hdr_data & 0xf0) >> 4;  in srtp_process_header_encryption()
1395             unsigned int xlen = (*xtn_hdr_data & 0x0f) + 1;  in srtp_process_header_encryption()
1397             xtn_hdr_data++;  in srtp_process_header_encryption()
1399             if (xtn_hdr_data + xlen > xtn_hdr_end)  in srtp_process_header_encryption()
1415                     *xtn_hdr_data ^= keystream[keystream_pos++];  in srtp_process_header_encryption()
1416                     xtn_hdr_data++;  in srtp_process_header_encryption()
1420                 xtn_hdr_data += xlen;  in srtp_process_header_encryption()
1424             while (xtn_hdr_data < xtn_hdr_end && *xtn_hdr_data == 0) {  in srtp_process_header_encryption()
1425                 xtn_hdr_data++;  in srtp_process_header_encryption()
1430         while (xtn_hdr_data + 1 < xtn_hdr_end) {  in srtp_process_header_encryption()
1431             uint8_t xid = *xtn_hdr_data;  in srtp_process_header_encryption()
1432             unsigned int xlen = *(xtn_hdr_data + 1);  in srtp_process_header_encryption()
1434             xtn_hdr_data += 2;  in srtp_process_header_encryption()
1436             if (xtn_hdr_data + xlen > xtn_hdr_end)  in srtp_process_header_encryption()
1447                     *xtn_hdr_data ^= keystream[keystream_pos++];  in srtp_process_header_encryption()
1448                     xtn_hdr_data++;  in srtp_process_header_encryption()
1452                 xtn_hdr_data += xlen;  in srtp_process_header_encryption()
1456             while (xtn_hdr_data < xtn_hdr_end && *xtn_hdr_data == 0) {  in srtp_process_header_encryption()
1457                 xtn_hdr_data++;  in srtp_process_header_encryption()