/*
* Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
* 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.
*
* Internet, ethernet, port, and protocol string to address
* and address to string conversion routines
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: addrtoname.c,v 1.13 2024/09/02 16:15:29 christos Exp $");
#endif
#include <config.h>
#ifdef HAVE_CASPER
#include <libcasper.h>
#include <casper/cap_dns.h>
#endif /* HAVE_CASPER */
#include "netdissect-stdinc.h"
#ifdef USE_ETHER_NTOHOST
#if defined(NET_ETHERNET_H_DECLARES_ETHER_NTOHOST)
/*
* OK, just include <net/ethernet.h>.
*/
#include <net/ethernet.h>
#elif defined(NETINET_ETHER_H_DECLARES_ETHER_NTOHOST)
/*
* OK, just include <netinet/ether.h>
*/
#include <netinet/ether.h>
#elif defined(SYS_ETHERNET_H_DECLARES_ETHER_NTOHOST)
/*
* OK, just include <sys/ethernet.h>
*/
#include <sys/ethernet.h>
#elif defined(ARPA_INET_H_DECLARES_ETHER_NTOHOST)
/*
* OK, just include <arpa/inet.h>
*/
#include <arpa/inet.h>
#elif defined(NETINET_IF_ETHER_H_DECLARES_ETHER_NTOHOST)
/*
* OK, include <netinet/if_ether.h>, after all the other stuff we
* need to include or define for its benefit.
*/
#define NEED_NETINET_IF_ETHER_H
#else
/*
* We'll have to declare it ourselves.
* If <netinet/if_ether.h> defines struct ether_addr, include
* it. Otherwise, define it ourselves.
*/
#ifdef HAVE_STRUCT_ETHER_ADDR
#define NEED_NETINET_IF_ETHER_H
#else /* HAVE_STRUCT_ETHER_ADDR */
struct ether_addr {
/* Beware FreeBSD calls this "octet". */
unsigned char ether_addr_octet[MAC_ADDR_LEN];
};
#endif /* HAVE_STRUCT_ETHER_ADDR */
#endif /* what declares ether_ntohost() */
#ifdef NEED_NETINET_IF_ETHER_H
/*
* Include diag-control.h before <net/if.h>, which too defines a macro
* named ND_UNREACHABLE.
*/
#include "diag-control.h"
#include <net/if.h> /* Needed on some platforms */
#include <netinet/in.h> /* Needed on some platforms */
#include <netinet/if_ether.h>
#endif /* NEED_NETINET_IF_ETHER_H */
#ifndef HAVE_DECL_ETHER_NTOHOST
/*
* No header declares it, so declare it ourselves.
*/
extern int ether_ntohost(char *, const struct ether_addr *);
#endif /* !defined(HAVE_DECL_ETHER_NTOHOST) */
#endif /* USE_ETHER_NTOHOST */
#include <pcap.h>
#include <pcap-namedb.h>
#ifndef HAVE_GETSERVENT
#include <getservent.h>
#endif
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "netdissect.h"
#include "addrtoname.h"
#include "addrtostr.h"
#include "ethertype.h"
#include "llc.h"
#include "extract.h"
#include "oui.h"
/*
* hash tables for whatever-to-name translations
*
* ndo_error() called on strdup(3) failure with S_ERR_ND_MEM_ALLOC status
*/
#define HASHNAMESIZE 4096
struct hnamemem {
uint32_t addr;
const char *name;
struct hnamemem *nxt;
};
static struct hnamemem hnametable[HASHNAMESIZE];
static struct hnamemem tporttable[HASHNAMESIZE];
static struct hnamemem uporttable[HASHNAMESIZE];
static struct hnamemem eprototable[HASHNAMESIZE];
static struct hnamemem dnaddrtable[HASHNAMESIZE];
static struct hnamemem ipxsaptable[HASHNAMESIZE];
#ifdef _WIN32
/*
* fake gethostbyaddr for Win2k/XP
* gethostbyaddr() returns incorrect value when AF_INET6 is passed
* to 3rd argument.
*
* h_name in struct hostent is only valid.
*/
static struct hostent *
win32_gethostbyaddr(const char *addr, int len, int type)
{
static struct hostent host;
static char hostbuf[NI_MAXHOST];
char hname[NI_MAXHOST];
struct sockaddr_in6 addr6;
host.h_name = hostbuf;
switch (type) {
case AF_INET:
return gethostbyaddr(addr, len, type);
break;
case AF_INET6:
memset(&addr6, 0, sizeof(addr6));
addr6.sin6_family = AF_INET6;
memcpy(&addr6.sin6_addr, addr, len);
if (getnameinfo((struct sockaddr *)&addr6, sizeof(addr6),
hname, sizeof(hname), NULL, 0, 0)) {
return NULL;
} else {
strlcpy(host.h_name, hname, NI_MAXHOST);
return &host;
}
break;
default:
return NULL;
}
}
#define gethostbyaddr win32_gethostbyaddr
#endif /* _WIN32 */
struct h6namemem {
nd_ipv6 addr;
char *name;
struct h6namemem *nxt;
};
static struct h6namemem h6nametable[HASHNAMESIZE];
struct enamemem {
u_short e_addr0;
u_short e_addr1;
u_short e_addr2;
const char *e_name;
u_char *e_nsap; /* used only for nsaptable[] */
struct enamemem *e_nxt;
};
static struct enamemem enametable[HASHNAMESIZE];
static struct enamemem nsaptable[HASHNAMESIZE];
struct bsnamemem {
u_short bs_addr0;
u_short bs_addr1;
u_short bs_addr2;
const char *bs_name;
u_char *bs_bytes;
unsigned int bs_nbytes;
struct bsnamemem *bs_nxt;
};
static struct bsnamemem bytestringtable[HASHNAMESIZE];
struct protoidmem {
uint32_t p_oui;
u_short p_proto;
const char *p_name;
struct protoidmem *p_nxt;
};
static struct protoidmem protoidtable[HASHNAMESIZE];
/*
* A faster replacement for inet_ntoa().
*/
const char *
intoa(uint32_t addr)
{
char *cp;
u_int byte;
int n;
static char buf[sizeof(".xxx.xxx.xxx.xxx")];
addr = ntohl(addr);
cp = buf + sizeof(buf);
*--cp = '\0';
n = 4;
do {
byte = addr & 0xff;
*--cp = (char)(byte % 10) + '0';
byte /= 10;
if (byte > 0) {
*--cp = (char)(byte % 10) + '0';
byte /= 10;
if (byte > 0)
*--cp = (char)byte + '0';
}
*--cp = '.';
addr >>= 8;
} while (--n > 0);
return cp + 1;
}
static uint32_t f_netmask;
static uint32_t f_localnet;
#ifdef HAVE_CASPER
cap_channel_t *capdns;
#endif
/*
* Return a name for the IP address pointed to by ap. This address
* is assumed to be in network byte order.
*
* NOTE: ap is *NOT* necessarily part of the packet data, so you
* *CANNOT* use the ND_TCHECK_* or ND_TTEST_* macros on it. Furthermore,
* even in cases where it *is* part of the packet data, the caller
* would still have to check for a null return value, even if it's
* just printing the return value with "%s" - not all versions of
* printf print "(null)" with "%s" and a null pointer, some of them
* don't check for a null pointer and crash in that case.
*
* The callers of this routine should, before handing this routine
* a pointer to packet data, be sure that the data is present in
* the packet buffer. They should probably do those checks anyway,
* as other data at that layer might not be IP addresses, and it
* also needs to check whether they're present in the packet buffer.
*/
const char *
ipaddr_string(netdissect_options *ndo, const u_char *ap)
{
struct hostent *hp;
uint32_t addr;
struct hnamemem *p;
memcpy(&addr, ap, sizeof(addr));
p = &hnametable[addr & (HASHNAMESIZE-1)];
for (; p->nxt; p = p->nxt) {
if (p->addr == addr)
return (p->name);
}
p->addr = addr;
p->nxt = newhnamemem(ndo);
/*
* Print names unless:
* (1) -n was given.
* (2) Address is foreign and -f was given. (If -f was not
* given, f_netmask and f_localnet are 0 and the test
* evaluates to true)
*/
if (!ndo->ndo_nflag &&
(addr & f_netmask) == f_localnet) {
#ifdef HAVE_CASPER
if (capdns != NULL) {
hp = cap_gethostbyaddr(capdns, (char *)&addr, 4,
AF_INET);
} else
#endif
hp = gethostbyaddr((char *)&addr, 4, AF_INET);
if (hp) {
char *dotp;
p->name = strdup(hp->h_name);
if (p->name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(hp->h_name)", __func__);
if (ndo->ndo_Nflag) {
/* Remove domain qualifications */
dotp = strchr(p->name, '.');
if (dotp)
*dotp = '\0';
}
return (p->name);
}
}
p->name = strdup(intoa(addr));
if (p->name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(intoa(addr))", __func__);
return (p->name);
}
/*
* Return a name for the IP6 address pointed to by ap. This address
* is assumed to be in network byte order.
*/
const char *
ip6addr_string(netdissect_options *ndo, const u_char *ap)
{
struct hostent *hp;
union {
nd_ipv6 addr;
struct for_hash_addr {
char fill[14];
uint16_t d;
} addra;
} addr;
struct h6namemem *p;
const char *cp;
char ntop_buf[INET6_ADDRSTRLEN];
memcpy(&addr, ap, sizeof(addr));
p = &h6nametable[addr.addra.d & (HASHNAMESIZE-1)];
for (; p->nxt; p = p->nxt) {
if (memcmp(&p->addr, &addr, sizeof(addr)) == 0)
return (p->name);
}
memcpy(p->addr, addr.addr, sizeof(nd_ipv6));
p->nxt = newh6namemem(ndo);
/*
* Do not print names if -n was given.
*/
if (!ndo->ndo_nflag) {
#ifdef HAVE_CASPER
if (capdns != NULL) {
hp = cap_gethostbyaddr(capdns, (char *)&addr,
sizeof(addr), AF_INET6);
} else
#endif
hp = gethostbyaddr((char *)&addr, sizeof(addr),
AF_INET6);
if (hp) {
char *dotp;
p->name = strdup(hp->h_name);
if (p->name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(hp->h_name)", __func__);
if (ndo->ndo_Nflag) {
/* Remove domain qualifications */
dotp = strchr(p->name, '.');
if (dotp)
*dotp = '\0';
}
return (p->name);
}
}
cp = addrtostr6(ap, ntop_buf, sizeof(ntop_buf));
p->name = strdup(cp);
if (p->name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(cp)", __func__);
return (p->name);
}
static const char hex[16] = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
};
/*
* Convert an octet to two hex digits.
*
* Coverity appears either:
*
* not to believe the C standard when it asserts that a uint8_t is
* exactly 8 bits in size;
*
* not to believe that an unsigned type of exactly 8 bits has a value
* in the range of 0 to 255;
*
* not to believe that, for a range of unsigned values, if you shift
* one of those values right by 4 bits, the maximum result value is
* the maximum value shifted right by 4 bits, with no stray 1's shifted
* in;
*
* not to believe that 255 >> 4 is 15;
*
* so it gets upset that we're taking a "tainted" unsigned value, shifting
* it right 4 bits, and using it as an index into a 16-element array.
*
* So we do a stupid pointless masking of the result of the shift with
* 0xf, to hammer the point home to Coverity.
*/
static inline char *
octet_to_hex(char *cp, uint8_t octet)
{
*cp++ = hex[(octet >> 4) & 0xf];
*cp++ = hex[(octet >> 0) & 0xf];
return (cp);
}
/* Find the hash node that corresponds the ether address 'ep' */
static struct enamemem *
lookup_emem(netdissect_options *ndo, const u_char *ep)
{
u_int i, j, k;
struct enamemem *tp;
k = (ep[0] << 8) | ep[1];
j = (ep[2] << 8) | ep[3];
i = (ep[4] << 8) | ep[5];
tp = &enametable[(i ^ j) & (HASHNAMESIZE-1)];
while (tp->e_nxt)
if (tp->e_addr0 == i &&
tp->e_addr1 == j &&
tp->e_addr2 == k)
return tp;
else
tp = tp->e_nxt;
tp->e_addr0 = (u_short)i;
tp->e_addr1 = (u_short)j;
tp->e_addr2 = (u_short)k;
tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
if (tp->e_nxt == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: calloc", __func__);
return tp;
}
/*
* Find the hash node that corresponds to the bytestring 'bs'
* with length 'nlen'
*/
static struct bsnamemem *
lookup_bytestring(netdissect_options *ndo, const u_char *bs,
const unsigned int nlen)
{
struct bsnamemem *tp;
u_int i, j, k;
if (nlen >= 6) {
k = (bs[0] << 8) | bs[1];
j = (bs[2] << 8) | bs[3];
i = (bs[4] << 8) | bs[5];
} else if (nlen >= 4) {
k = (bs[0] << 8) | bs[1];
j = (bs[2] << 8) | bs[3];
i = 0;
} else
i = j = k = 0;
tp = &bytestringtable[(i ^ j) & (HASHNAMESIZE-1)];
while (tp->bs_nxt)
if (nlen == tp->bs_nbytes &&
tp->bs_addr0 == i &&
tp->bs_addr1 == j &&
tp->bs_addr2 == k &&
memcmp((const char *)bs, (const char *)(tp->bs_bytes), nlen) == 0)
return tp;
else
tp = tp->bs_nxt;
tp->bs_addr0 = (u_short)i;
tp->bs_addr1 = (u_short)j;
tp->bs_addr2 = (u_short)k;
tp->bs_bytes = (u_char *) calloc(1, nlen);
if (tp->bs_bytes == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: calloc", __func__);
memcpy(tp->bs_bytes, bs, nlen);
tp->bs_nbytes = nlen;
tp->bs_nxt = (struct bsnamemem *)calloc(1, sizeof(*tp));
if (tp->bs_nxt == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: calloc", __func__);
return tp;
}
/* Find the hash node that corresponds the NSAP 'nsap' */
static struct enamemem *
lookup_nsap(netdissect_options *ndo, const u_char *nsap,
u_int nsap_length)
{
u_int i, j, k;
struct enamemem *tp;
const u_char *ensap;
if (nsap_length > 6) {
ensap = nsap + nsap_length - 6;
k = (ensap[0] << 8) | ensap[1];
j = (ensap[2] << 8) | ensap[3];
i = (ensap[4] << 8) | ensap[5];
} else
i = j = k = 0;
tp = &nsaptable[(i ^ j) & (HASHNAMESIZE-1)];
while (tp->e_nxt)
if (nsap_length == tp->e_nsap[0] &&
tp->e_addr0 == i &&
tp->e_addr1 == j &&
tp->e_addr2 == k &&
memcmp((const char *)nsap,
(char *)&(tp->e_nsap[1]), nsap_length) == 0)
return tp;
else
tp = tp->e_nxt;
tp->e_addr0 = (u_short)i;
tp->e_addr1 = (u_short)j;
tp->e_addr2 = (u_short)k;
tp->e_nsap = (u_char *)malloc(nsap_length + 1);
if (tp->e_nsap == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: malloc", __func__);
tp->e_nsap[0] = (u_char)nsap_length; /* guaranteed < ISONSAP_MAX_LENGTH */
memcpy((char *)&tp->e_nsap[1], (const char *)nsap, nsap_length);
tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp));
if (tp->e_nxt == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: calloc", __func__);
return tp;
}
/* Find the hash node that corresponds the protoid 'pi'. */
static struct protoidmem *
lookup_protoid(netdissect_options *ndo, const u_char *pi)
{
u_int i, j;
struct protoidmem *tp;
/* 5 octets won't be aligned */
i = (((pi[0] << 8) + pi[1]) << 8) + pi[2];
j = (pi[3] << 8) + pi[4];
/* XXX should be endian-insensitive, but do big-endian testing XXX */
tp = &protoidtable[(i ^ j) & (HASHNAMESIZE-1)];
while (tp->p_nxt)
if (tp->p_oui == i && tp->p_proto == j)
return tp;
else
tp = tp->p_nxt;
tp->p_oui = i;
tp->p_proto = (u_short)j;
tp->p_nxt = (struct protoidmem *)calloc(1, sizeof(*tp));
if (tp->p_nxt == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC, "%s: calloc", __func__);
return tp;
}
const char *
etheraddr_string(netdissect_options *ndo, const uint8_t *ep)
{
int i;
char *cp;
struct enamemem *tp;
int oui;
char buf[BUFSIZE];
tp = lookup_emem(ndo, ep);
if (tp->e_name)
return (tp->e_name);
#ifdef USE_ETHER_NTOHOST
if (!ndo->ndo_nflag) {
char buf2[BUFSIZE];
/*
* This is a non-const copy of ep for ether_ntohost(), which
* has its second argument non-const in OpenBSD. Also saves a
* type cast.
*/
struct ether_addr ea;
memcpy (&ea, ep, MAC_ADDR_LEN);
if (ether_ntohost(buf2, &ea) == 0) {
tp->e_name = strdup(buf2);
if (tp->e_name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(buf2)", __func__);
return (tp->e_name);
}
}
#endif
cp = buf;
oui = EXTRACT_BE_U_3(ep);
cp = octet_to_hex(cp, *ep++);
for (i = 5; --i >= 0;) {
*cp++ = ':';
cp = octet_to_hex(cp, *ep++);
}
if (!ndo->ndo_nflag) {
snprintf(cp, BUFSIZE - (2 + 5*3), " (oui %s)",
tok2str(oui_values, "Unknown", oui));
} else
*cp = '\0';
tp->e_name = strdup(buf);
if (tp->e_name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(buf)", __func__);
return (tp->e_name);
}
const char *
le64addr_string(netdissect_options *ndo, const uint8_t *ep)
{
const unsigned int len = 8;
u_int i;
char *cp;
struct bsnamemem *tp;
char buf[BUFSIZE];
tp = lookup_bytestring(ndo, ep, len);
if (tp->bs_name)
return (tp->bs_name);
cp = buf;
for (i = len; i > 0 ; --i) {
cp = octet_to_hex(cp, *(ep + i - 1));
*cp++ = ':';
}
cp --;
*cp = '\0';
tp->bs_name = strdup(buf);
if (tp->bs_name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(buf)", __func__);
return (tp->bs_name);
}
const char *
linkaddr_string(netdissect_options *ndo, const uint8_t *ep,
const unsigned int type, const unsigned int len)
{
u_int i;
char *cp;
struct bsnamemem *tp;
if (len == 0)
return ("<empty>");
if (type == LINKADDR_ETHER && len == MAC_ADDR_LEN)
return (etheraddr_string(ndo, ep));
if (type == LINKADDR_FRELAY)
return (q922_string(ndo, ep, len));
tp = lookup_bytestring(ndo, ep, len);
if (tp->bs_name)
return (tp->bs_name);
tp->bs_name = cp = (char *)malloc(len*3);
if (tp->bs_name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: malloc", __func__);
cp = octet_to_hex(cp, *ep++);
for (i = len-1; i > 0 ; --i) {
*cp++ = ':';
cp = octet_to_hex(cp, *ep++);
}
*cp = '\0';
return (tp->bs_name);
}
#define ISONSAP_MAX_LENGTH 20
const char *
isonsap_string(netdissect_options *ndo, const uint8_t *nsap,
u_int nsap_length)
{
u_int nsap_idx;
char *cp;
struct enamemem *tp;
if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH)
return ("isonsap_string: illegal length");
tp = lookup_nsap(ndo, nsap, nsap_length);
if (tp->e_name)
return tp->e_name;
tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx"));
if (cp == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: malloc", __func__);
for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) {
cp = octet_to_hex(cp, *nsap++);
if (((nsap_idx & 1) == 0) &&
(nsap_idx + 1 < nsap_length)) {
*cp++ = '.';
}
}
*cp = '\0';
return (tp->e_name);
}
const char *
tcpport_string(netdissect_options *ndo, u_short port)
{
struct hnamemem *tp;
uint32_t i = port;
char buf[sizeof("00000")];
for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
if (tp->addr == i)
return (tp->name);
tp->addr = i;
tp->nxt = newhnamemem(ndo);
(void)snprintf(buf, sizeof(buf), "%u", i);
tp->name = strdup(buf);
if (tp->name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(buf)", __func__);
return (tp->name);
}
const char *
udpport_string(netdissect_options *ndo, u_short port)
{
struct hnamemem *tp;
uint32_t i = port;
char buf[sizeof("00000")];
for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
if (tp->addr == i)
return (tp->name);
tp->addr = i;
tp->nxt = newhnamemem(ndo);
(void)snprintf(buf, sizeof(buf), "%u", i);
tp->name = strdup(buf);
if (tp->name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(buf)", __func__);
return (tp->name);
}
const char *
ipxsap_string(netdissect_options *ndo, u_short port)
{
char *cp;
struct hnamemem *tp;
uint32_t i = port;
char buf[sizeof("0000")];
for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
if (tp->addr == i)
return (tp->name);
tp->addr = i;
tp->nxt = newhnamemem(ndo);
cp = buf;
port = ntohs(port);
*cp++ = hex[port >> 12 & 0xf];
*cp++ = hex[port >> 8 & 0xf];
*cp++ = hex[port >> 4 & 0xf];
*cp++ = hex[port & 0xf];
*cp++ = '\0';
tp->name = strdup(buf);
if (tp->name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(buf)", __func__);
return (tp->name);
}
static void
init_servarray(netdissect_options *ndo)
{
struct servent *sv;
struct hnamemem *table;
int i;
char buf[sizeof("0000000000")];
while ((sv = getservent()) != NULL) {
int port = ntohs(sv->s_port);
i = port & (HASHNAMESIZE-1);
if (strcmp(sv->s_proto, "tcp") == 0)
table = &tporttable[i];
else if (strcmp(sv->s_proto, "udp") == 0)
table = &uporttable[i];
else
continue;
while (table->name)
table = table->nxt;
if (ndo->ndo_nflag) {
(void)snprintf(buf, sizeof(buf), "%d", port);
table->name = strdup(buf);
} else
table->name = strdup(sv->s_name);
if (table->name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup", __func__);
table->addr = port;
table->nxt = newhnamemem(ndo);
}
endservent();
}
static const struct eproto {
const char *s;
u_short p;
} eproto_db[] = {
{ "aarp", ETHERTYPE_AARP },
{ "arp", ETHERTYPE_ARP },
{ "atalk", ETHERTYPE_ATALK },
{ "decnet", ETHERTYPE_DN },
{ "ip", ETHERTYPE_IP },
{ "ip6", ETHERTYPE_IPV6 },
{ "lat", ETHERTYPE_LAT },
{ "loopback", ETHERTYPE_LOOPBACK },
{ "mopdl", ETHERTYPE_MOPDL },
{ "moprc", ETHERTYPE_MOPRC },
{ "rarp", ETHERTYPE_REVARP },
{ "sca", ETHERTYPE_SCA },
{ (char *)0, 0 }
};
static void
init_eprotoarray(netdissect_options *ndo)
{
int i;
struct hnamemem *table;
for (i = 0; eproto_db[i].s; i++) {
int j = htons(eproto_db[i].p) & (HASHNAMESIZE-1);
table = &eprototable[j];
while (table->name)
table = table->nxt;
table->name = eproto_db[i].s;
table->addr = htons(eproto_db[i].p);
table->nxt = newhnamemem(ndo);
}
}
static const struct protoidlist {
const u_char protoid[5];
const char *name;
} protoidlist[] = {
{{ 0x00, 0x00, 0x0c, 0x01, 0x07 }, "CiscoMLS" },
{{ 0x00, 0x00, 0x0c, 0x20, 0x00 }, "CiscoCDP" },
{{ 0x00, 0x00, 0x0c, 0x20, 0x01 }, "CiscoCGMP" },
{{ 0x00, 0x00, 0x0c, 0x20, 0x03 }, "CiscoVTP" },
{{ 0x00, 0xe0, 0x2b, 0x00, 0xbb }, "ExtremeEDP" },
{{ 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
};
/*
* SNAP proto IDs with org code 0:0:0 are actually encapsulated Ethernet
* types.
*/
static void
init_protoidarray(netdissect_options *ndo)
{
int i;
struct protoidmem *tp;
const struct protoidlist *pl;
u_char protoid[5];
protoid[0] = 0;
protoid[1] = 0;
protoid[2] = 0;
for (i = 0; eproto_db[i].s; i++) {
u_short etype = htons(eproto_db[i].p);
memcpy((char *)&protoid[3], (char *)&etype, 2);
tp = lookup_protoid(ndo, protoid);
tp->p_name = strdup(eproto_db[i].s);
if (tp->p_name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(eproto_db[i].s)", __func__);
}
/* Hardwire some SNAP proto ID names */
for (pl = protoidlist; pl->name != NULL; ++pl) {
tp = lookup_protoid(ndo, pl->protoid);
/* Don't override existing name */
if (tp->p_name != NULL)
continue;
tp->p_name = pl->name;
}
}
static const struct etherlist {
const nd_mac_addr addr;
const char *name;
} etherlist[] = {
{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, "Broadcast" },
{{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL }
};
/*
* Initialize the ethers hash table. We take two different approaches
* depending on whether or not the system provides the ethers name
* service. If it does, we just wire in a few names at startup,
* and etheraddr_string() fills in the table on demand. If it doesn't,
* then we suck in the entire /etc/ethers file at startup. The idea
* is that parsing the local file will be fast, but spinning through
* all the ethers entries via NIS & next_etherent might be very slow.
*
* XXX pcap_next_etherent doesn't belong in the pcap interface, but
* since the pcap module already does name-to-address translation,
* it's already does most of the work for the ethernet address-to-name
* translation, so we just pcap_next_etherent as a convenience.
*/
static void
init_etherarray(netdissect_options *ndo)
{
const struct etherlist *el;
struct enamemem *tp;
#ifdef USE_ETHER_NTOHOST
char name[256];
#else
struct pcap_etherent *ep;
FILE *fp;
/* Suck in entire ethers file */
fp = fopen(PCAP_ETHERS_FILE, "r");
if (fp != NULL) {
while ((ep = pcap_next_etherent(fp)) != NULL) {
tp = lookup_emem(ndo, ep->addr);
tp->e_name = strdup(ep->name);
if (tp->e_name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(ep->addr)", __func__);
}
(void)fclose(fp);
}
#endif
/* Hardwire some ethernet names */
for (el = etherlist; el->name != NULL; ++el) {
tp = lookup_emem(ndo, el->addr);
/* Don't override existing name */
if (tp->e_name != NULL)
continue;
#ifdef USE_ETHER_NTOHOST
/*
* Use YP/NIS version of name if available.
*/
/* Same workaround as in etheraddr_string(). */
struct ether_addr ea;
memcpy (&ea, el->addr, MAC_ADDR_LEN);
if (ether_ntohost(name, &ea) == 0) {
tp->e_name = strdup(name);
if (tp->e_name == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: strdup(name)", __func__);
continue;
}
#endif
tp->e_name = el->name;
}
}
static const struct ipxsap_ent {
uint16_t v;
const char *s;
} ipxsap_db[] = {
{ 0x0000, "Unknown" },
{ 0x0001, "User" },
{ 0x0002, "User Group" },
{ 0x0003, "PrintQueue" },
{ 0x0004, "FileServer" },
{ 0x0005, "JobServer" },
{ 0x0006, "Gateway" },
{ 0x0007, "PrintServer" },
{ 0x0008, "ArchiveQueue" },
{ 0x0009, "ArchiveServer" },
{ 0x000a, "JobQueue" },
{ 0x000b, "Administration" },
{ 0x000F, "Novell TI-RPC" },
{ 0x0017, "Diagnostics" },
{ 0x0020, "NetBIOS" },
{ 0x0021, "NAS SNA Gateway" },
{ 0x0023, "NACS AsyncGateway" },
{ 0x0024, "RemoteBridge/RoutingService" },
{ 0x0026, "BridgeServer" },
{ 0x0027, "TCP/IP Gateway" },
{ 0x0028, "Point-to-point X.25 BridgeServer" },
{ 0x0029, "3270 Gateway" },
{ 0x002a, "CHI Corp" },
{ 0x002c, "PC Chalkboard" },
{ 0x002d, "TimeSynchServer" },
{ 0x002e, "ARCserve5.0/PalindromeBackup" },
{ 0x0045, "DI3270 Gateway" },
{ 0x0047, "AdvertisingPrintServer" },
{ 0x004a, "NetBlazerModems" },
{ 0x004b, "BtrieveVAP" },
{ 0x004c, "NetwareSQL" },
{ 0x004d, "XtreeNetwork" },
{ 0x0050, "BtrieveVAP4.11" },
{ 0x0052, "QuickLink" },
{ 0x0053, "PrintQueueUser" },
{ 0x0058, "Multipoint X.25 Router" },
{ 0x0060, "STLB/NLM" },
{ 0x0064, "ARCserve" },
{ 0x0066, "ARCserve3.0" },
{ 0x0072, "WAN CopyUtility" },
{ 0x007a, "TES-NetwareVMS" },
{ 0x0092, "WATCOM Debugger/EmeraldTapeBackupServer" },
{ 0x0095, "DDA OBGYN" },
{ 0x0098, "NetwareAccessServer" },
{ 0x009a, "Netware for VMS II/NamedPipeServer" },
{ 0x009b, "NetwareAccessServer" },
{ 0x009e, "PortableNetwareServer/SunLinkNVT" },
{ 0x00a1, "PowerchuteAPC UPS" },
{ 0x00aa, "LAWserve" },
{ 0x00ac, "CompaqIDA StatusMonitor" },
{ 0x0100, "PIPE STAIL" },
{ 0x0102, "LAN ProtectBindery" },
{ 0x0103, "OracleDataBaseServer" },
{ 0x0107, "Netware386/RSPX RemoteConsole" },
{ 0x010f, "NovellSNA Gateway" },
{ 0x0111, "TestServer" },
{ 0x0112, "HP PrintServer" },
{ 0x0114, "CSA MUX" },
{ 0x0115, "CSA LCA" },
{ 0x0116, "CSA CM" },
{ 0x0117, "CSA SMA" },
{ 0x0118, "CSA DBA" },
{ 0x0119, "CSA NMA" },
{ 0x011a, "CSA SSA" },
{ 0x011b, "CSA STATUS" },
{ 0x011e, "CSA APPC" },
{ 0x0126, "SNA TEST SSA Profile" },
{ 0x012a, "CSA TRACE" },
{ 0x012b, "NetwareSAA" },
{ 0x012e, "IKARUS VirusScan" },
{ 0x0130, "CommunicationsExecutive" },
{ 0x0133, "NNS DomainServer/NetwareNamingServicesDomain" },
{ 0x0135, "NetwareNamingServicesProfile" },
{ 0x0137, "Netware386 PrintQueue/NNS PrintQueue" },
{ 0x0141, "LAN SpoolServer" },
{ 0x0152, "IRMALAN Gateway" },
{ 0x0154, "NamedPipeServer" },
{ 0x0166, "NetWareManagement" },
{ 0x0168, "Intel PICKIT CommServer/Intel CAS TalkServer" },
{ 0x0173, "Compaq" },
{ 0x0174, "Compaq SNMP Agent" },
{ 0x0175, "Compaq" },
{ 0x0180, "XTreeServer/XTreeTools" },
{ 0x018A, "NASI ServicesBroadcastServer" },
{ 0x01b0, "GARP Gateway" },
{ 0x01b1, "Binfview" },
{ 0x01bf, "IntelLanDeskManager" },
{ 0x01ca, "AXTEC" },
{ 0x01cb, "ShivaNetModem/E" },
{ 0x01cc, "ShivaLanRover/E" },
{ 0x01cd, "ShivaLanRover/T" },
{ 0x01ce, "ShivaUniversal" },
{ 0x01d8, "CastelleFAXPressServer" },
{ 0x01da, "CastelleLANPressPrintServer" },
{ 0x01dc, "CastelleFAX/Xerox7033 FaxServer/ExcelLanFax" },
{ 0x01f0, "LEGATO" },
{ 0x01f5, "LEGATO" },
{ 0x0233, "NMS Agent/NetwareManagementAgent" },
{ 0x0237, "NMS IPX Discovery/LANternReadWriteChannel" },
{ 0x0238, "NMS IP Discovery/LANternTrapAlarmChannel" },
{ 0x023a, "LANtern" },
{ 0x023c, "MAVERICK" },
{ 0x023f, "NovellSMDR" },
{ 0x024e, "NetwareConnect" },
{ 0x024f, "NASI ServerBroadcast Cisco" },
{ 0x026a, "NMS ServiceConsole" },
{ 0x026b, "TimeSynchronizationServer Netware 4.x" },
{ 0x0278, "DirectoryServer Netware 4.x" },
{ 0x027b, "NetwareManagementAgent" },
{ 0x0280, "Novell File and Printer Sharing Service for PC" },
{ 0x0304, "NovellSAA Gateway" },
{ 0x0308, "COM/VERMED" },
{ 0x030a, "GalacticommWorldgroupServer" },
{ 0x030c, "IntelNetport2/HP JetDirect/HP Quicksilver" },
{ 0x0320, "AttachmateGateway" },
{ 0x0327, "MicrosoftDiagnostics" },
{ 0x0328, "WATCOM SQL Server" },
{ 0x0335, "MultiTechSystems MultisynchCommServer" },
{ 0x0343, "Xylogics RemoteAccessServer/LANModem" },
{ 0x0355, "ArcadaBackupExec" },
{ 0x0358, "MSLCD1" },
{ 0x0361, "NETINELO" },
{ 0x037e, "Powerchute UPS Monitoring" },
{ 0x037f, "ViruSafeNotify" },
{ 0x0386, "HP Bridge" },
{ 0x0387, "HP Hub" },
{ 0x0394, "NetWare SAA Gateway" },
{ 0x039b, "LotusNotes" },
{ 0x03b7, "CertusAntiVirus" },
{ 0x03c4, "ARCserve4.0" },
{ 0x03c7, "LANspool3.5" },
{ 0x03d7, "LexmarkPrinterServer" },
{ 0x03d8, "LexmarkXLE PrinterServer" },
{ 0x03dd, "BanyanENS NetwareClient" },
{ 0x03de, "GuptaSequelBaseServer/NetWareSQL" },
{ 0x03e1, "UnivelUnixware" },
{ 0x03e4, "UnivelUnixware" },
{ 0x03fc, "IntelNetport" },
{ 0x03fd, "PrintServerQueue" },
{ 0x040A, "ipnServer" },
{ 0x040D, "LVERRMAN" },
{ 0x040E, "LVLIC" },
{ 0x0414, "NET Silicon (DPI)/Kyocera" },
{ 0x0429, "SiteLockVirus" },
{ 0x0432, "UFHELPR???" },
{ 0x0433, "Synoptics281xAdvancedSNMPAgent" },
{ 0x0444, "MicrosoftNT SNA Server" },
{ 0x0448, "Oracle" },
{ 0x044c, "ARCserve5.01" },
{ 0x0457, "CanonGP55" },
{ 0x045a, "QMS Printers" },
{ 0x045b, "DellSCSI Array" },
{ 0x0491, "NetBlazerModems" },
{ 0x04ac, "OnTimeScheduler" },
{ 0x04b0, "CD-Net" },
{ 0x0513, "EmulexNQA" },
{ 0x0520, "SiteLockChecks" },
{ 0x0529, "SiteLockChecks" },
{ 0x052d, "CitrixOS2 AppServer" },
{ 0x0535, "Tektronix" },
{ 0x0536, "Milan" },
{ 0x055d, "Attachmate SNA gateway" },
{ 0x056b, "IBM8235 ModemServer" },
{ 0x056c, "ShivaLanRover/E PLUS" },
{ 0x056d, "ShivaLanRover/T PLUS" },
{ 0x0580, "McAfeeNetShield" },
{ 0x05B8, "NLM to workstation communication (Revelation Software)" },
{ 0x05BA, "CompatibleSystemsRouters" },
{ 0x05BE, "CheyenneHierarchicalStorageManager" },
{ 0x0606, "JCWatermarkImaging" },
{ 0x060c, "AXISNetworkPrinter" },
{ 0x0610, "AdaptecSCSIManagement" },
{ 0x0621, "IBM AntiVirus" },
{ 0x0640, "Windows95 RemoteRegistryService" },
{ 0x064e, "MicrosoftIIS" },
{ 0x067b, "Microsoft Win95/98 File and Print Sharing for NetWare" },
{ 0x067c, "Microsoft Win95/98 File and Print Sharing for NetWare" },
{ 0x076C, "Xerox" },
{ 0x079b, "ShivaLanRover/E 115" },
{ 0x079c, "ShivaLanRover/T 115" },
{ 0x07B4, "CubixWorldDesk" },
{ 0x07c2, "Quarterdeck IWare Connect V2.x NLM" },
{ 0x07c1, "Quarterdeck IWare Connect V3.x NLM" },
{ 0x0810, "ELAN License Server Demo" },
{ 0x0824, "ShivaLanRoverAccessSwitch/E" },
{ 0x086a, "ISSC Collector" },
{ 0x087f, "ISSC DAS AgentAIX" },
{ 0x0880, "Intel Netport PRO" },
{ 0x0881, "Intel Netport PRO" },
{ 0x0b29, "SiteLock" },
{ 0x0c29, "SiteLockApplications" },
{ 0x0c2c, "LicensingServer" },
{ 0x2101, "PerformanceTechnologyInstantInternet" },
{ 0x2380, "LAI SiteLock" },
{ 0x238c, "MeetingMaker" },
{ 0x4808, "SiteLockServer/SiteLockMetering" },
{ 0x5555, "SiteLockUser" },
{ 0x6312, "Tapeware" },
{ 0x6f00, "RabbitGateway" },
{ 0x7703, "MODEM" },
{ 0x8002, "NetPortPrinters" },
{ 0x8008, "WordPerfectNetworkVersion" },
{ 0x85BE, "Cisco EIGRP" },
{ 0x8888, "WordPerfectNetworkVersion/QuickNetworkManagement" },
{ 0x9000, "McAfeeNetShield" },
{ 0x9604, "CSA-NT_MON" },
{ 0xb6a8, "OceanIsleReachoutRemoteControl" },
{ 0xf11f, "SiteLockMetering" },
{ 0xf1ff, "SiteLock" },
{ 0xf503, "Microsoft SQL Server" },
{ 0xF905, "IBM TimeAndPlace" },
{ 0xfbfb, "TopCallIII FaxServer" },
{ 0xffff, "AnyService/Wildcard" },
{ 0, (char *)0 }
};
static void
init_ipxsaparray(netdissect_options *ndo)
{
int i;
struct hnamemem *table;
for (i = 0; ipxsap_db[i].s != NULL; i++) {
u_int j = htons(ipxsap_db[i].v) & (HASHNAMESIZE-1);
table = &ipxsaptable[j];
while (table->name)
table = table->nxt;
table->name = ipxsap_db[i].s;
table->addr = htons(ipxsap_db[i].v);
table->nxt = newhnamemem(ndo);
}
}
/*
* Initialize the address to name translation machinery. We map all
* non-local IP addresses to numeric addresses if ndo->ndo_fflag is true
* (i.e., to prevent blocking on the nameserver). localnet is the IP address
* of the local network. mask is its subnet mask.
*/
void
init_addrtoname(netdissect_options *ndo, uint32_t localnet, uint32_t mask)
{
if (ndo->ndo_fflag) {
f_localnet = localnet;
f_netmask = mask;
}
if (ndo->ndo_nflag)
/*
* Simplest way to suppress names.
*/
return;
init_etherarray(ndo);
init_servarray(ndo);
init_eprotoarray(ndo);
init_protoidarray(ndo);
init_ipxsaparray(ndo);
}
const char *
dnaddr_string(netdissect_options *ndo, u_short dnaddr)
{
struct hnamemem *tp;
for (tp = &dnaddrtable[dnaddr & (HASHNAMESIZE-1)]; tp->nxt != NULL;
tp = tp->nxt)
if (tp->addr == dnaddr)
return (tp->name);
tp->addr = dnaddr;
tp->nxt = newhnamemem(ndo);
tp->name = dnnum_string(ndo, dnaddr);
return(tp->name);
}
/* Return a zero'ed hnamemem struct and cuts down on calloc() overhead */
struct hnamemem *
newhnamemem(netdissect_options *ndo)
{
struct hnamemem *p;
static struct hnamemem *ptr = NULL;
static u_int num = 0;
if (num == 0) {
num = 64;
ptr = (struct hnamemem *)calloc(num, sizeof (*ptr));
if (ptr == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: calloc", __func__);
}
--num;
p = ptr++;
return (p);
}
/* Return a zero'ed h6namemem struct and cuts down on calloc() overhead */
struct h6namemem *
newh6namemem(netdissect_options *ndo)
{
struct h6namemem *p;
static struct h6namemem *ptr = NULL;
static u_int num = 0;
if (num == 0) {
num = 64;
ptr = (struct h6namemem *)calloc(num, sizeof (*ptr));
if (ptr == NULL)
(*ndo->ndo_error)(ndo, S_ERR_ND_MEM_ALLOC,
"%s: calloc", __func__);
}
--num;
p = ptr++;
return (p);
}
/* Represent TCI part of the 802.1Q 4-octet tag as text. */
const char *
ieee8021q_tci_string(const uint16_t tci)
{
static char buf[128];
snprintf(buf, sizeof(buf), "vlan %u, p %u%s",
tci & 0xfff,
tci >> 13,
(tci & 0x1000) ? ", DEI" : "");
return buf;
}
