1 /* $OpenBSD: print-enc.c,v 1.6 2000/10/03 14:31:57 ho Exp $ */ 2 3 /* 4 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that: (1) source code distributions 9 * retain the above copyright notice and this paragraph in its entirety, (2) 10 * distributions including binary code include the above copyright notice and 11 * this paragraph in its entirety in the documentation or other materials 12 * provided with the distribution, and (3) all advertising materials mentioning 13 * features or use of this software display the following acknowledgement: 14 * ``This product includes software developed by the University of California, 15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16 * the University nor the names of its contributors may be used to endorse 17 * or promote products derived from this software without specific prior 18 * written permission. 19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22 */ 23 24 #ifndef lint 25 static const char rcsid[] = 26 "@(#) $Header: /home/cvs/src/usr.sbin/tcpdump/print-enc.c,v 1.6 2000/10/03 14:31:57 ho Exp $ (LBL)"; 27 #endif 28 29 #include <sys/param.h> 30 #include <sys/time.h> 31 #include <sys/socket.h> 32 #include <sys/file.h> 33 #include <sys/ioctl.h> 34 #include <sys/mbuf.h> 35 36 #ifdef __STDC__ 37 struct rtentry; 38 #endif 39 #include <net/if.h> 40 #include <netinet/ip_ipsp.h> 41 #include <net/if_enc.h> 42 43 #include <netinet/in.h> 44 #include <netinet/in_systm.h> 45 #include <netinet/ip.h> 46 47 #include <ctype.h> 48 #include <netdb.h> 49 #include <pcap.h> 50 #include <signal.h> 51 #include <stdio.h> 52 53 #include "interface.h" 54 #include "addrtoname.h" 55 56 #define ENC_PRINT_TYPE(wh, xf, nam) \ 57 if ((wh) & (xf)) { \ 58 printf("%s%s", nam, (wh) == (xf) ? "): " : ","); \ 59 (wh) &= ~(xf); \ 60 } 61 62 void 63 enc_if_print(u_char *user, const struct pcap_pkthdr *h, 64 register const u_char *p) 65 { 66 register u_int length = h->len; 67 register u_int caplen = h->caplen; 68 int flags; 69 const struct ip *ip; 70 const struct enchdr *hdr; 71 72 ts_print(&h->ts); 73 74 if (caplen < ENC_HDRLEN) { 75 printf("[|enc]"); 76 goto out; 77 } 78 79 /* 80 * Some printers want to get back at the link level addresses, 81 * and/or check that they're not walking off the end of the packet. 82 * Rather than pass them all the way down, we set these globals. 83 */ 84 packetp = p; 85 snapend = p + caplen; 86 87 hdr = (struct enchdr *)p; 88 flags = hdr->flags; 89 if (flags == 0) 90 printf("(unprotected): "); 91 else 92 printf("("); 93 ENC_PRINT_TYPE(flags, M_AUTH, "authentic"); 94 ENC_PRINT_TYPE(flags, M_CONF, "confidential"); 95 /* ENC_PRINT_TYPE(flags, M_TUNNEL, "tunnel"); */ 96 printf("SPI 0x%08x: ", ntohl(hdr->spi)); 97 98 length -= ENC_HDRLEN; 99 ip = (struct ip *)(p + ENC_HDRLEN); 100 ip_print((const u_char *)ip, length); 101 102 if (xflag) 103 default_print((const u_char *)ip, caplen - ENC_HDRLEN); 104 out: 105 putchar('\n'); 106 } 107