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      1 /*
      2  * Copyright (c) 1990, 1992, 1993, 1994, 1995, 1996, 1997
      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 #include "extract.h"
     23 
     24 #ifdef HAVE_CASPER
     25 #include <libcasper.h>
     26 extern cap_channel_t *capdns;
     27 #endif
     28 
     29 /*
     30  * Definition to let us compile most of the IPv6 code even on systems
     31  * without IPv6 support.
     32  */
     33 #ifndef INET6_ADDRSTRLEN
     34 #define INET6_ADDRSTRLEN	46
     35 #endif
     36 
     37 /* Name to address translation routines. */
     38 
     39 enum {
     40     LINKADDR_ETHER,
     41     LINKADDR_FRELAY,
     42     LINKADDR_IEEE1394,
     43     LINKADDR_ATM,
     44     LINKADDR_OTHER
     45 };
     46 
     47 #define BUFSIZE 128
     48 
     49 extern const char *linkaddr_string(netdissect_options *, const uint8_t *, const unsigned int, const unsigned int);
     50 extern const char *etheraddr_string(netdissect_options *, const uint8_t *);
     51 extern const char *le64addr_string(netdissect_options *, const uint8_t *);
     52 extern const char *tcpport_string(netdissect_options *, u_short);
     53 extern const char *udpport_string(netdissect_options *, u_short);
     54 extern const char *isonsap_string(netdissect_options *, const uint8_t *, u_int);
     55 extern const char *dnaddr_string(netdissect_options *, u_short);
     56 extern const char *ipxsap_string(netdissect_options *, u_short);
     57 extern const char *ipaddr_string(netdissect_options *, const u_char *);
     58 extern const char *ip6addr_string(netdissect_options *, const u_char *);
     59 extern const char *intoa(uint32_t);
     60 
     61 extern void init_addrtoname(netdissect_options *, uint32_t, uint32_t);
     62 extern struct hnamemem *newhnamemem(netdissect_options *);
     63 extern struct h6namemem *newh6namemem(netdissect_options *);
     64 extern const char * ieee8021q_tci_string(const uint16_t);
     65 
     66 /* macro(s) and inline function(s) with setjmp/longjmp logic to call
     67  * the X_string() function(s) after bounds checking.
     68  * The macro(s) must be used on a packet buffer pointer.
     69  */
     70 
     71 static inline const char *
     72 get_linkaddr_string(netdissect_options *ndo, const uint8_t *p,
     73     const unsigned int type, const unsigned int len)
     74 {
     75         if (!ND_TTEST_LEN(p, len))
     76                 nd_trunc_longjmp(ndo);
     77         return linkaddr_string(ndo, p, type, len);
     78 }
     79 
     80 static inline const char *
     81 get_etheraddr_string(netdissect_options *ndo, const uint8_t *p)
     82 {
     83         if (!ND_TTEST_LEN(p, MAC_ADDR_LEN))
     84                 nd_trunc_longjmp(ndo);
     85         return etheraddr_string(ndo, p);
     86 }
     87 
     88 static inline const char *
     89 get_le64addr_string(netdissect_options *ndo, const u_char *p)
     90 {
     91         if (!ND_TTEST_8(p))
     92                 nd_trunc_longjmp(ndo);
     93         return le64addr_string(ndo, p);
     94 }
     95 
     96 static inline const char *
     97 get_isonsap_string(netdissect_options *ndo, const uint8_t *nsap,
     98     u_int nsap_length)
     99 {
    100 	if (!ND_TTEST_LEN(nsap, nsap_length))
    101                 nd_trunc_longjmp(ndo);
    102         return isonsap_string(ndo, nsap, nsap_length);
    103 }
    104 
    105 static inline const char *
    106 get_ipaddr_string(netdissect_options *ndo, const u_char *p)
    107 {
    108         if (!ND_TTEST_4(p))
    109                 nd_trunc_longjmp(ndo);
    110         return ipaddr_string(ndo, p);
    111 }
    112 
    113 static inline const char *
    114 get_ip6addr_string(netdissect_options *ndo, const u_char *p)
    115 {
    116         if (!ND_TTEST_16(p))
    117                 nd_trunc_longjmp(ndo);
    118         return ip6addr_string(ndo, p);
    119 }
    120 
    121 #define GET_LINKADDR_STRING(p, type, len) get_linkaddr_string(ndo, (const u_char *)(p), type, len)
    122 #define GET_ETHERADDR_STRING(p) get_etheraddr_string(ndo, (const u_char *)(p))
    123 #define GET_LE64ADDR_STRING(p) get_le64addr_string(ndo, (const u_char *)(p))
    124 #define GET_ISONSAP_STRING(nsap, nsap_length) get_isonsap_string(ndo, (const u_char *)(nsap), nsap_length)
    125 #define GET_IPADDR_STRING(p) get_ipaddr_string(ndo, (const u_char *)(p))
    126 #define GET_IP6ADDR_STRING(p) get_ip6addr_string(ndo, (const u_char *)(p))
    127