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-rw-r--r--addrtoname.c1330
1 files changed, 1330 insertions, 0 deletions
diff --git a/addrtoname.c b/addrtoname.c
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index 0000000..914665c
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+++ b/addrtoname.c
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+/*
+ * 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
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#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, "MicrosoftDiagnostiocs" },
+ { 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 03:51:51 +0000