1 /* 2 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 */ 21 22 #ifndef lint 23 static const char rcsid[] = 24 "@(#) $Header: /home/cvs/src/usr.sbin/tcpdump/print-enc.c,v 1.1 1998/06/11 00:01:25 provos Exp $ (LBL)"; 25 #endif 26 27 #include <sys/param.h> 28 #include <sys/time.h> 29 #include <sys/socket.h> 30 #include <sys/file.h> 31 #include <sys/ioctl.h> 32 #include <sys/mbuf.h> 33 34 #ifdef __STDC__ 35 struct rtentry; 36 #endif 37 #include <net/if.h> 38 #include <net/if_enc.h> 39 40 #include <netinet/in.h> 41 #include <netinet/in_systm.h> 42 #include <netinet/ip.h> 43 44 #include <ctype.h> 45 #include <netdb.h> 46 #include <pcap.h> 47 #include <signal.h> 48 #include <stdio.h> 49 50 #include "interface.h" 51 #include "addrtoname.h" 52 53 #define ENC_PRINT_TYPE(wh, xf, nam) \ 54 if ((wh) & (xf)) { \ 55 printf("%s%s", nam, (wh) == (xf) ? "): " : ","); \ 56 (wh) &= ~(xf); \ 57 } 58 59 void 60 enc_if_print(u_char *user, const struct pcap_pkthdr *h, 61 register const u_char *p) 62 { 63 register u_int length = h->len; 64 register u_int caplen = h->caplen; 65 int flags; 66 const struct ip *ip; 67 const struct enchdr *hdr; 68 69 ts_print(&h->ts); 70 71 if (caplen < ENC_HDRLEN) { 72 printf("[|enc]"); 73 goto out; 74 } 75 76 /* 77 * Some printers want to get back at the link level addresses, 78 * and/or check that they're not walking off the end of the packet. 79 * Rather than pass them all the way down, we set these globals. 80 */ 81 packetp = p; 82 snapend = p + caplen; 83 84 hdr = (struct enchdr *)p; 85 printf("SPI 0x%08x (", ntohl(hdr->spi)); 86 flags = hdr->flags; 87 ENC_PRINT_TYPE(flags, M_AUTH, "authentic"); 88 ENC_PRINT_TYPE(flags, M_CONF, "confidential"); 89 ENC_PRINT_TYPE(flags, M_TUNNEL, "tunnel"); 90 91 length -= ENC_HDRLEN; 92 ip = (struct ip *)(p + ENC_HDRLEN); 93 ip_print((const u_char *)ip, length); 94 95 if (xflag) 96 default_print((const u_char *)ip, caplen - ENC_HDRLEN); 97 out: 98 putchar('\n'); 99 } 100