diff options
Diffstat (limited to 'contrib/tcpdump/print-ah.c')
-rw-r--r-- | contrib/tcpdump/print-ah.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-ah.c b/contrib/tcpdump/print-ah.c new file mode 100644 index 0000000..9a36ff4 --- /dev/null +++ b/contrib/tcpdump/print-ah.c @@ -0,0 +1,103 @@ +/* $NetBSD: print-ah.c,v 1.4 1996/05/20 00:41:16 fvdl Exp $ */ + +/* + * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that: (1) source code distributions + * retain the above copyright notice and this paragraph in its entirety, (2) + * distributions including binary code include the above copyright notice and + * this paragraph in its entirety in the documentation or other materials + * provided with the distribution, and (3) all advertising materials mentioning + * features or use of this software display the following acknowledgement: + * ``This product includes software developed by the University of California, + * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of + * the University nor the names of its contributors may be used to endorse + * or promote products derived from this software without specific prior + * written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +#ifndef lint +static const char rcsid[] = + "@(#) $Header: /tcpdump/master/tcpdump/print-ah.c,v 1.5 1999/12/15 08:10:17 fenner Exp $ (LBL)"; +#endif + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <sys/param.h> +#include <sys/time.h> +#include <sys/types.h> +#include <sys/socket.h> + +#include <net/route.h> +#include <net/if.h> + +#include <netinet/in.h> +#include <netinet/if_ether.h> +#include <netinet/in_systm.h> +#include <netinet/ip.h> +#include <netinet/ip_icmp.h> +#include <netinet/ip_var.h> +#include <netinet/udp.h> +#include <netinet/udp_var.h> +#include <netinet/tcp.h> + +#include <stdio.h> + +/* there's no standard definition so we are on our own */ +struct ah { + u_int8_t ah_nxt; /* Next Header */ + u_int8_t ah_len; /* Length of data, in 32bit */ + u_int16_t ah_reserve; /* Reserved for future use */ + u_int32_t ah_spi; /* Security parameter index */ + /* variable size, 32bit bound*/ /* Authentication data */ +}; + +struct newah { + u_int8_t ah_nxt; /* Next Header */ + u_int8_t ah_len; /* Length of data + 1, in 32bit */ + u_int16_t ah_reserve; /* Reserved for future use */ + u_int32_t ah_spi; /* Security parameter index */ + u_int32_t ah_seq; /* Sequence number field */ + /* variable size, 32bit bound*/ /* Authentication data */ +}; + +#include "interface.h" +#include "addrtoname.h" + +int +ah_print(register const u_char *bp, register const u_char *bp2) +{ + register const struct ah *ah; + register const u_char *ep; + int sumlen; + u_int32_t spi; + + ah = (struct ah *)bp; + ep = snapend; /* 'ep' points to the end of avaible data. */ + + if ((u_char *)(ah + 1) >= ep - sizeof(struct ah)) + goto trunc; + + sumlen = ah->ah_len << 2; + spi = (u_int32_t)ntohl(ah->ah_spi); + + printf("AH(spi=%u", spi); + if (vflag) + printf(",sumlen=%d", sumlen); + printf(",seq=0x%x", (u_int32_t)ntohl(*(u_int32_t *)(ah + 1))); + if (bp + sizeof(struct ah) + sumlen > ep) + fputs("[truncated]", stdout); + fputs("): ", stdout); + + return sizeof(struct ah) + sumlen; + trunc: + fputs("[|AH]", stdout); + return 65535; +} |