1 /* $OpenBSD: print-udpencap.c,v 1.7 2020/01/24 22:46:37 procter Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Markus Friedl. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/types.h> 28 #include <stdio.h> 29 30 #include "interface.h" 31 32 void 33 udpencap_print(const u_char *bp, u_int len, const u_char *bp2) 34 { 35 u_int32_t *spi; 36 37 /* Recognize NAT-T Keepalive msgs. (draft-ietf-ipsec-udp-encaps-nn) */ 38 if (len == 1 && *bp == 0xFF) { 39 printf("NAT-T Keepalive"); 40 return; 41 } 42 43 if (len < sizeof(u_int32_t)) { 44 printf("[|udpencap]"); 45 return; 46 } 47 printf("udpencap: "); 48 spi = (u_int32_t *)(bp); 49 if (*spi == 0) 50 ike_print(bp + sizeof(u_int32_t), len - sizeof(u_int32_t)); 51 else 52 esp_print(bp, len, bp2); 53 } 54