X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/8b761a965f6c5d01c1f1f7bb91708d63085babe1..486704db7c840dcfb51f70f1812d9c3ad37ad39c:/addrtoname.c diff --git a/addrtoname.c b/addrtoname.c index dbea7507..551ebb90 100644 --- a/addrtoname.c +++ b/addrtoname.c @@ -21,10 +21,6 @@ * Internet, ethernet, port, and protocol string to address * and address to string conversion routines */ -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/addrtoname.c,v 1.103 2004-03-18 21:01:39 guy Exp $ (LBL)"; -#endif #ifdef HAVE_CONFIG_H #include "config.h" @@ -39,9 +35,19 @@ struct rtentry; /* declarations in */ #include /* for "struct ifnet" in "struct arpcom" on Solaris */ #include #endif /* HAVE_NETINET_IF_ETHER_H */ -#ifdef HAVE_NETINET_ETHER_H -#include /* ether_ntohost on linux */ -#endif /* HAVE_NETINET_ETHER_H */ +#ifdef NETINET_ETHER_H_DECLARES_ETHER_NTOHOST +#include +#endif /* NETINET_ETHER_H_DECLARES_ETHER_NTOHOST */ + +#if !defined(HAVE_DECL_ETHER_NTOHOST) || !HAVE_DECL_ETHER_NTOHOST +#ifndef HAVE_STRUCT_ETHER_ADDR +struct ether_addr { + unsigned char ether_addr_octet[6]; +}; +#endif +extern int ether_ntohost(char *, const struct ether_addr *); +#endif + #endif /* USE_ETHER_NTOHOST */ #include @@ -55,30 +61,35 @@ struct rtentry; /* declarations in */ #include "addrtoname.h" #include "llc.h" #include "setsignal.h" +#include "extract.h" +#include "oui.h" + +#ifndef ETHER_ADDR_LEN +#define ETHER_ADDR_LEN 6 +#endif /* * hash tables for whatever-to-name translations * - * XXX there has to be error checks against strdup(3) failure + * error() called on strdup(3) failure */ #define HASHNAMESIZE 4096 struct hnamemem { - u_int32_t addr; + uint32_t addr; const char *name; struct hnamemem *nxt; }; -struct hnamemem hnametable[HASHNAMESIZE]; -struct hnamemem tporttable[HASHNAMESIZE]; -struct hnamemem uporttable[HASHNAMESIZE]; -struct hnamemem eprototable[HASHNAMESIZE]; -struct hnamemem dnaddrtable[HASHNAMESIZE]; -struct hnamemem llcsaptable[HASHNAMESIZE]; -struct hnamemem ipxsaptable[HASHNAMESIZE]; +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]; -#if defined(INET6) && defined(WIN32) +#if defined(INET6) && defined(_WIN32) /* * fake gethostbyaddr for Win2k/XP * gethostbyaddr() returns incorrect value when AF_INET6 is passed @@ -103,25 +114,20 @@ win32_gethostbyaddr(const char *addr, int len, int type) memset(&addr6, 0, sizeof(addr6)); addr6.sin6_family = AF_INET6; memcpy(&addr6.sin6_addr, addr, len); -#ifdef __MINGW32__ - /* MinGW doesn't provide getnameinfo */ - return NULL; -#else if (getnameinfo((struct sockaddr *)&addr6, sizeof(addr6), - hname, sizeof(hname), NULL, 0, 0)) { - return NULL; + hname, sizeof(hname), NULL, 0, 0)) { + return NULL; } else { strcpy(host.h_name, hname); return &host; } -#endif /* __MINGW32__ */ break; default: return NULL; } } #define gethostbyaddr win32_gethostbyaddr -#endif /* INET6 & WIN32*/ +#endif /* INET6 & _WIN32 */ #ifdef INET6 struct h6namemem { @@ -130,7 +136,7 @@ struct h6namemem { struct h6namemem *nxt; }; -struct h6namemem h6nametable[HASHNAMESIZE]; +static struct h6namemem h6nametable[HASHNAMESIZE]; #endif /* INET6 */ struct enamemem { @@ -143,24 +149,24 @@ struct enamemem { struct enamemem *e_nxt; }; -struct enamemem enametable[HASHNAMESIZE]; -struct enamemem nsaptable[HASHNAMESIZE]; -struct enamemem bytestringtable[HASHNAMESIZE]; +static struct enamemem enametable[HASHNAMESIZE]; +static struct enamemem nsaptable[HASHNAMESIZE]; +static struct enamemem bytestringtable[HASHNAMESIZE]; struct protoidmem { - u_int32_t p_oui; + uint32_t p_oui; u_short p_proto; const char *p_name; struct protoidmem *p_nxt; }; -struct protoidmem protoidtable[HASHNAMESIZE]; +static struct protoidmem protoidtable[HASHNAMESIZE]; /* * A faster replacement for inet_ntoa(). */ const char * -intoa(u_int32_t addr) +intoa(uint32_t addr) { register char *cp; register u_int byte; @@ -168,7 +174,7 @@ intoa(u_int32_t addr) static char buf[sizeof(".xxx.xxx.xxx.xxx")]; NTOHL(addr); - cp = &buf[sizeof buf]; + cp = buf + sizeof(buf); *--cp = '\0'; n = 4; @@ -189,23 +195,34 @@ intoa(u_int32_t addr) return cp + 1; } -static u_int32_t f_netmask; -static u_int32_t f_localnet; +static uint32_t f_netmask; +static uint32_t f_localnet; /* * 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 (not even if + * this is being called with the "ipaddr_string()" macro), so you + * *CANNOT* use the ND_TCHECK{2}/ND_TTEST{2} 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 * -getname(const u_char *ap) +getname(netdissect_options *ndo, const u_char *ap) { register struct hostent *hp; - u_int32_t addr; - static struct hnamemem *p; /* static for longjmp() */ - - if(!TTEST2(*ap, sizeof(addr))) { - return NULL; - } + uint32_t addr; + struct hnamemem *p; memcpy(&addr, ap, sizeof(addr)); p = &hnametable[addr & (HASHNAMESIZE-1)]; @@ -223,14 +240,16 @@ getname(const u_char *ap) * given, f_netmask and f_localnet are 0 and the test * evaluates to true) */ - if (!nflag && + if (!ndo->ndo_nflag && (addr & f_netmask) == f_localnet) { hp = gethostbyaddr((char *)&addr, 4, AF_INET); if (hp) { char *dotp; p->name = strdup(hp->h_name); - if (Nflag) { + if (p->name == NULL) + error("getname: strdup(hp->h_name)"); + if (ndo->ndo_Nflag) { /* Remove domain qualifications */ dotp = strchr(p->name, '.'); if (dotp) @@ -240,6 +259,8 @@ getname(const u_char *ap) } } p->name = strdup(intoa(addr)); + if (p->name == NULL) + error("getname: strdup(intoa(addr))"); return (p->name); } @@ -249,33 +270,41 @@ getname(const u_char *ap) * is assumed to be in network byte order. */ const char * -getname6(const u_char *ap) +getname6(netdissect_options *ndo, const u_char *ap) { register struct hostent *hp; - struct in6_addr addr; - static struct h6namemem *p; /* static for longjmp() */ + union { + struct in6_addr addr; + struct for_hash_addr { + char fill[14]; + uint16_t d; + } addra; + } addr; + struct h6namemem *p; register const char *cp; char ntop_buf[INET6_ADDRSTRLEN]; memcpy(&addr, ap, sizeof(addr)); - p = &h6nametable[*(u_int16_t *)&addr.s6_addr[14] & (HASHNAMESIZE-1)]; + p = &h6nametable[addr.addra.d & (HASHNAMESIZE-1)]; for (; p->nxt; p = p->nxt) { if (memcmp(&p->addr, &addr, sizeof(addr)) == 0) return (p->name); } - p->addr = addr; + p->addr = addr.addr; p->nxt = newh6namemem(); /* * Do not print names if -n was given. */ - if (!nflag) { + if (!ndo->ndo_nflag) { hp = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET6); if (hp) { char *dotp; p->name = strdup(hp->h_name); - if (Nflag) { + if (p->name == NULL) + error("getname6: strdup(hp->h_name)"); + if (ndo->ndo_Nflag) { /* Remove domain qualifications */ dotp = strchr(p->name, '.'); if (dotp) @@ -286,11 +315,13 @@ getname6(const u_char *ap) } cp = inet_ntop(AF_INET6, &addr, ntop_buf, sizeof(ntop_buf)); p->name = strdup(cp); + if (p->name == NULL) + error("getname6: strdup(cp)"); return (p->name); } #endif /* INET6 */ -static char hex[] = "0123456789abcdef"; +static const char hex[] = "0123456789abcdef"; /* Find the hash node that corresponds the ether address 'ep' */ @@ -360,6 +391,9 @@ lookup_bytestring(register const u_char *bs, const unsigned int nlen) tp->e_addr2 = k; tp->e_bs = (u_char *) calloc(1, nlen + 1); + if (tp->e_bs == NULL) + error("lookup_bytestring: calloc"); + memcpy(tp->e_bs, bs, nlen); tp->e_nxt = (struct enamemem *)calloc(1, sizeof(*tp)); if (tp->e_nxt == NULL) @@ -440,47 +474,95 @@ lookup_protoid(const u_char *pi) } const char * -etheraddr_string(register const u_char *ep) +etheraddr_string(netdissect_options *ndo, register const u_char *ep) { - register u_int i; + register int i; register char *cp; register struct enamemem *tp; - char buf[sizeof("00:00:00:00:00:00")]; + int oui; + char buf[BUFSIZE]; tp = lookup_emem(ep); if (tp->e_name) return (tp->e_name); #ifdef USE_ETHER_NTOHOST - if (!nflag) { - char buf2[128]; + if (!ndo->ndo_nflag) { + char buf2[BUFSIZE]; + if (ether_ntohost(buf2, (const struct ether_addr *)ep) == 0) { tp->e_name = strdup(buf2); + if (tp->e_name == NULL) + error("etheraddr_string: strdup(buf2)"); return (tp->e_name); } } #endif cp = buf; - *cp++ = hex[*ep >> 4 ]; + oui = EXTRACT_24BITS(ep); + *cp++ = hex[*ep >> 4 ]; *cp++ = hex[*ep++ & 0xf]; - for (i = 5; (int)--i >= 0;) { + for (i = 5; --i >= 0;) { *cp++ = ':'; - *cp++ = hex[*ep >> 4 ]; + *cp++ = hex[*ep >> 4 ]; *cp++ = hex[*ep++ & 0xf]; } + + 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) + error("etheraddr_string: strdup(buf)"); + return (tp->e_name); +} + +const char * +le64addr_string(const u_char *ep) +{ + const unsigned int len = 8; + register u_int i; + register char *cp; + register struct enamemem *tp; + char buf[BUFSIZE]; + + tp = lookup_bytestring(ep, len); + if (tp->e_name) + return (tp->e_name); + + cp = buf; + for (i = len; i > 0 ; --i) { + *cp++ = hex[*(ep + i - 1) >> 4]; + *cp++ = hex[*(ep + i - 1) & 0xf]; + *cp++ = ':'; + } + cp --; + *cp = '\0'; + tp->e_name = strdup(buf); + if (tp->e_name == NULL) + error("le64addr_string: strdup(buf)"); + return (tp->e_name); } const char * -linkaddr_string(const u_char *ep, const unsigned int len) +linkaddr_string(netdissect_options *ndo, const u_char *ep, const unsigned int type, const unsigned int len) { register u_int i; register char *cp; register struct enamemem *tp; - if (len == 6) /* XXX not totally correct... */ - return etheraddr_string(ep); + if (len == 0) + return (""); + + if (type == LINKADDR_ETHER && len == ETHER_ADDR_LEN) + return (etheraddr_string(ndo, ep)); + + if (type == LINKADDR_FRELAY) + return (q922_string(ndo, ep, len)); tp = lookup_bytestring(ep, len); if (tp->e_name) @@ -505,7 +587,7 @@ etherproto_string(u_short port) { register char *cp; register struct hnamemem *tp; - register u_int32_t i = port; + register uint32_t i = port; char buf[sizeof("0000")]; for (tp = &eprototable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) @@ -523,6 +605,8 @@ etherproto_string(u_short port) *cp++ = hex[port & 0xf]; *cp++ = '\0'; tp->name = strdup(buf); + if (tp->name == NULL) + error("etherproto_string: strdup(buf)"); return (tp->name); } @@ -550,48 +634,37 @@ protoid_string(register const u_char *pi) } *cp = '\0'; tp->p_name = strdup(buf); + if (tp->p_name == NULL) + error("protoid_string: strdup(buf)"); return (tp->p_name); } +#define ISONSAP_MAX_LENGTH 20 const char * -llcsap_string(u_char sap) +isonsap_string(const u_char *nsap, register u_int nsap_length) { - register struct hnamemem *tp; - register u_int32_t i = sap; - char buf[sizeof("sap 00")]; - - for (tp = &llcsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) - if (tp->addr == i) - return (tp->name); - - tp->addr = i; - tp->nxt = newhnamemem(); - - snprintf(buf, sizeof(buf), "sap %02x", sap & 0xff); - tp->name = strdup(buf); - return (tp->name); -} - -const char * -isonsap_string(const u_char *nsap) -{ - register u_int i, nlen = nsap[0]; + register u_int nsap_idx; register char *cp; register struct enamemem *tp; + if (nsap_length < 1 || nsap_length > ISONSAP_MAX_LENGTH) + return ("isonsap_string: illegal length"); + tp = lookup_nsap(nsap); if (tp->e_name) return tp->e_name; - tp->e_name = cp = (char *)malloc(nlen * 2 + 2); + tp->e_name = cp = (char *)malloc(sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx")); if (cp == NULL) error("isonsap_string: malloc"); - nsap++; - *cp++ = '/'; - for (i = nlen; (int)--i >= 0;) { + for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) { *cp++ = hex[*nsap >> 4]; *cp++ = hex[*nsap++ & 0xf]; + if (((nsap_idx & 1) == 0) && + (nsap_idx + 1 < nsap_length)) { + *cp++ = '.'; + } } *cp = '\0'; return (tp->e_name); @@ -601,7 +674,7 @@ const char * tcpport_string(u_short port) { register struct hnamemem *tp; - register u_int32_t i = port; + register uint32_t i = port; char buf[sizeof("00000")]; for (tp = &tporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) @@ -613,6 +686,8 @@ tcpport_string(u_short port) (void)snprintf(buf, sizeof(buf), "%u", i); tp->name = strdup(buf); + if (tp->name == NULL) + error("tcpport_string: strdup(buf)"); return (tp->name); } @@ -620,7 +695,7 @@ const char * udpport_string(register u_short port) { register struct hnamemem *tp; - register u_int32_t i = port; + register uint32_t i = port; char buf[sizeof("00000")]; for (tp = &uporttable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) @@ -632,6 +707,8 @@ udpport_string(register u_short port) (void)snprintf(buf, sizeof(buf), "%u", i); tp->name = strdup(buf); + if (tp->name == NULL) + error("udpport_string: strdup(buf)"); return (tp->name); } @@ -640,7 +717,7 @@ ipxsap_string(u_short port) { register char *cp; register struct hnamemem *tp; - register u_int32_t i = port; + register uint32_t i = port; char buf[sizeof("0000")]; for (tp = &ipxsaptable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt) @@ -658,11 +735,13 @@ ipxsap_string(u_short port) *cp++ = hex[port & 0xf]; *cp++ = '\0'; tp->name = strdup(buf); + if (tp->name == NULL) + error("ipxsap_string: strdup(buf)"); return (tp->name); } static void -init_servarray(void) +init_servarray(netdissect_options *ndo) { struct servent *sv; register struct hnamemem *table; @@ -681,24 +760,28 @@ init_servarray(void) while (table->name) table = table->nxt; - if (nflag) { + 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) + error("init_servarray: strdup"); + table->addr = port; table->nxt = newhnamemem(); } endservent(); } -/*XXX from libbpfc.a */ -#ifndef WIN32 -extern struct eproto { +/* in libpcap.a (nametoaddr.c) */ +#if defined(_WIN32) && !defined(USE_STATIC_LIBPCAP) +extern __declspec(dllimport) #else -__declspec( dllimport) struct eproto { +extern #endif - char *s; +const struct eproto { + const char *s; u_short p; } eproto_db[]; @@ -719,7 +802,7 @@ init_eprotoarray(void) } } -static struct protoidlist { +static const struct protoidlist { const u_char protoid[5]; const char *name; } protoidlist[] = { @@ -740,7 +823,7 @@ init_protoidarray(void) { register int i; register struct protoidmem *tp; - struct protoidlist *pl; + const struct protoidlist *pl; u_char protoid[5]; protoid[0] = 0; @@ -752,6 +835,8 @@ init_protoidarray(void) memcpy((char *)&protoid[3], (char *)&etype, 2); tp = lookup_protoid(protoid); tp->p_name = strdup(eproto_db[i].s); + if (tp->p_name == NULL) + error("init_protoidarray: strdup(eproto_db[i].s)"); } /* Hardwire some SNAP proto ID names */ for (pl = protoidlist; pl->name != NULL; ++pl) { @@ -764,7 +849,7 @@ init_protoidarray(void) } } -static struct etherlist { +static const struct etherlist { const u_char addr[6]; const char *name; } etherlist[] = { @@ -789,7 +874,7 @@ static struct etherlist { static void init_etherarray(void) { - register struct etherlist *el; + register const struct etherlist *el; register struct enamemem *tp; #ifdef USE_ETHER_NTOHOST char name[256]; @@ -803,6 +888,8 @@ init_etherarray(void) while ((ep = pcap_next_etherent(fp)) != NULL) { tp = lookup_emem(ep->addr); tp->e_name = strdup(ep->name); + if (tp->e_name == NULL) + error("init_etherarray: strdup(ep->addr)"); } (void)fclose(fp); } @@ -816,9 +903,13 @@ init_etherarray(void) continue; #ifdef USE_ETHER_NTOHOST - /* Use yp/nis version of name if available */ - if (ether_ntohost(name, (const struct ether_addr *)el->addr) == 0) { - tp->e_name = strdup(name); + /* + * Use YP/NIS version of name if available. + */ + if (ether_ntohost(name, (const struct ether_addr *)el->addr) == 0) { + tp->e_name = strdup(name); + if (tp->e_name == NULL) + error("init_etherarray: strdup(name)"); continue; } #endif @@ -826,41 +917,7 @@ init_etherarray(void) } } -static struct tok llcsap_db[] = { - { LLCSAP_NULL, "null" }, - { LLCSAP_8021B_I, "802.1b-gsap" }, - { LLCSAP_8021B_G, "802.1b-isap" }, - { LLCSAP_IP, "ip-sap" }, - { LLCSAP_PROWAYNM, "proway-nm" }, - { LLCSAP_8021D, "802.1d" }, - { LLCSAP_RS511, "eia-rs511" }, - { LLCSAP_ISO8208, "x.25/llc2" }, - { LLCSAP_PROWAY, "proway" }, - { LLCSAP_SNAP, "snap" }, - { LLCSAP_IPX, "IPX" }, - { LLCSAP_NETBEUI, "netbeui" }, - { LLCSAP_ISONS, "iso-clns" }, - { LLCSAP_GLOBAL, "global" }, - { 0, NULL } -}; - -static void -init_llcsaparray(void) -{ - register int i; - register struct hnamemem *table; - - for (i = 0; llcsap_db[i].s != NULL; i++) { - table = &llcsaptable[llcsap_db[i].v]; - while (table->name) - table = table->nxt; - table->name = llcsap_db[i].s; - table->addr = llcsap_db[i].v; - table->nxt = newhnamemem(); - } -} - -static struct tok ipxsap_db[] = { +static const struct tok ipxsap_db[] = { { 0x0000, "Unknown" }, { 0x0001, "User" }, { 0x0002, "User Group" }, @@ -1096,33 +1153,32 @@ init_ipxsaparray(void) /* * Initialize the address to name translation machinery. We map all - * non-local IP addresses to numeric addresses if fflag is true (i.e., - * to prevent blocking on the nameserver). localnet is the IP address + * 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(u_int32_t localnet, u_int32_t mask) +init_addrtoname(netdissect_options *ndo, uint32_t localnet, uint32_t mask) { - if (fflag) { + if (ndo->ndo_fflag) { f_localnet = localnet; f_netmask = mask; } - if (nflag) + if (ndo->ndo_nflag) /* * Simplest way to suppress names. */ return; init_etherarray(); - init_servarray(); + init_servarray(ndo); init_eprotoarray(); - init_llcsaparray(); init_protoidarray(); init_ipxsaparray(); } const char * -dnaddr_string(u_short dnaddr) +dnaddr_string(netdissect_options *ndo, u_short dnaddr) { register struct hnamemem *tp; @@ -1133,7 +1189,7 @@ dnaddr_string(u_short dnaddr) tp->addr = dnaddr; tp->nxt = newhnamemem(); - if (nflag) + if (ndo->ndo_nflag) tp->name = dnnum_string(dnaddr); else tp->name = dnname_string(dnaddr); @@ -1180,3 +1236,15 @@ newh6namemem(void) return (p); } #endif /* INET6 */ + +/* 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; +}