/* $NetBSD: nametoaddr.c,v 1.8 2026/03/18 23:43:20 christos Exp $ */ /* * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998 * 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. * * Name to id translation routines used by the scanner. * These functions are not time critical. */ #include __RCSID("$NetBSD: nametoaddr.c,v 1.8 2026/03/18 23:43:20 christos Exp $"); #include #ifdef DECNETLIB #include #include #endif #ifdef _WIN32 #include #include #else /* _WIN32 */ #include #include #include #include #include #ifdef HAVE_ETHER_HOSTTON #if defined(NET_ETHERNET_H_DECLARES_ETHER_HOSTTON) /* * OK, just include . */ #include #elif defined(NETINET_ETHER_H_DECLARES_ETHER_HOSTTON) /* * OK, just include */ #include #elif defined(SYS_ETHERNET_H_DECLARES_ETHER_HOSTTON) /* * OK, just include */ #include #elif defined(ARPA_INET_H_DECLARES_ETHER_HOSTTON) /* * OK, just include */ #include #elif defined(NETINET_IF_ETHER_H_DECLARES_ETHER_HOSTTON) /* * OK, include , 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 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 { unsigned char ether_addr_octet[6]; }; #endif /* HAVE_STRUCT_ETHER_ADDR */ #endif /* what declares ether_hostton() */ #ifdef NEED_NETINET_IF_ETHER_H #include /* Needed on some platforms */ #include /* Needed on some platforms */ #include #endif /* NEED_NETINET_IF_ETHER_H */ #ifndef HAVE_DECL_ETHER_HOSTTON /* * No header declares it, so declare it ourselves. */ extern int ether_hostton(const char *, struct ether_addr *); #endif /* !defined(HAVE_DECL_ETHER_HOSTTON) */ #endif /* HAVE_ETHER_HOSTTON */ #include #include #endif /* _WIN32 */ #include #include #include #include #include "pcap-int.h" #include "diag-control.h" #include "gencode.h" #include #include "nametoaddr.h" #include "thread-local.h" #ifdef HAVE_OS_PROTO_H #include "os-proto.h" #endif #ifndef NTOHL #define NTOHL(x) (x) = ntohl(x) #define NTOHS(x) (x) = ntohs(x) #endif /* * Convert host name to internet address. * Return 0 upon failure. * XXX - not thread-safe; don't use it inside libpcap. */ bpf_u_int32 ** pcap_nametoaddr(const char *name) { #ifndef h_addr static bpf_u_int32 *hlist[2]; #endif bpf_u_int32 **p; struct hostent *hp; /* * gethostbyname() is deprecated on Windows, perhaps because * it's not thread-safe, or because it doesn't support IPv6, * or both. * * We deprecate pcap_nametoaddr() on all platforms because * it's not thread-safe; we supply it for backwards compatibility, * so suppress the deprecation warning. We could, I guess, * use getaddrinfo() and construct the array ourselves, but * that's probably not worth the effort, as that wouldn't make * this thread-safe - we can't change the API to require that * our caller free the address array, so we still have to reuse * a local array. */ DIAG_OFF_DEPRECATION if ((hp = gethostbyname(name)) != NULL) { DIAG_ON_DEPRECATION #ifndef h_addr hlist[0] = (bpf_u_int32 *)hp->h_addr; NTOHL(hp->h_addr); return hlist; #else for (p = (bpf_u_int32 **)hp->h_addr_list; *p; ++p) NTOHL(**p); return (bpf_u_int32 **)hp->h_addr_list; #endif } else return 0; } struct addrinfo * pcap_nametoaddrinfo(const char *name) { struct addrinfo hints, *res; int error; memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_STREAM; /*not really*/ hints.ai_protocol = IPPROTO_TCP; /*not really*/ error = getaddrinfo(name, NULL, &hints, &res); if (error) return NULL; else return res; } /* * Convert net name to internet address. * Return 0 upon failure. * XXX - not guaranteed to be thread-safe! See below for platforms * on which it is thread-safe and on which it isn't. */ #if defined(_WIN32) || defined(__CYGWIN__) bpf_u_int32 pcap_nametonetaddr(const char *name _U_) { /* * There's no "getnetbyname()" on Windows. * * XXX - I guess we could use the BSD code to read * C:\Windows\System32\drivers\etc/networks, assuming * that's its home on all the versions of Windows * we use, but that file probably just has the loopback * network on 127/24 on 99 44/100% of Windows machines. * * (Heck, these days it probably just has that on 99 44/100% * of *UN*X* machines.) */ return 0; } #else /* _WIN32 */ bpf_u_int32 pcap_nametonetaddr(const char *name) { /* * UN*X. */ struct netent *np; #if defined(HAVE_LINUX_GETNETBYNAME_R) /* * We have Linux's reentrant getnetbyname_r(). */ struct netent result_buf; char buf[1024]; /* arbitrary size */ int h_errnoval; int err; /* * Apparently, the man page at * * http://man7.org/linux/man-pages/man3/getnetbyname_r.3.html * * lies when it says * * If the function call successfully obtains a network record, * then *result is set pointing to result_buf; otherwise, *result * is set to NULL. * * and, in fact, at least in some versions of GNU libc, it does * *not* always get set if getnetbyname_r() succeeds. */ np = NULL; err = getnetbyname_r(name, &result_buf, buf, sizeof buf, &np, &h_errnoval); if (err != 0) { /* * XXX - dynamically allocate the buffer, and make it * bigger if we get ERANGE back? */ return 0; } #elif defined(HAVE_SOLARIS_IRIX_GETNETBYNAME_R) /* * We have Solaris's and IRIX's reentrant getnetbyname_r(). */ struct netent result_buf; char buf[1024]; /* arbitrary size */ np = getnetbyname_r(name, &result_buf, buf, (int)sizeof buf); #elif defined(HAVE_AIX_GETNETBYNAME_R) /* * We have AIX's reentrant getnetbyname_r(). */ struct netent result_buf; struct netent_data net_data; if (getnetbyname_r(name, &result_buf, &net_data) == -1) np = NULL; else np = &result_buf; #else /* * We don't have any getnetbyname_r(); either we have a * getnetbyname() that uses thread-specific data, in which * case we're thread-safe (sufficiently recent FreeBSD, * sufficiently recent Darwin-based OS, sufficiently recent * HP-UX, sufficiently recent Tru64 UNIX), or we have the * traditional getnetbyname() (everything else, including * current NetBSD and OpenBSD), in which case we're not * thread-safe. */ np = getnetbyname(name); #endif if (np != NULL) return np->n_net; else return 0; } #endif /* _WIN32 */ /* * Convert a port name to its port and protocol numbers. * We assume only TCP or UDP. * Return 0 upon failure. */ int pcap_nametoport(const char *name, int *port, int *proto) { struct addrinfo hints, *res, *ai; int error; struct sockaddr_in *in4; #ifdef INET6 struct sockaddr_in6 *in6; #endif int tcp_port = -1; int udp_port = -1; /* * We check for both TCP and UDP in case there are * ambiguous entries. */ memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_STREAM; hints.ai_protocol = IPPROTO_TCP; error = getaddrinfo(NULL, name, &hints, &res); if (error != 0) { if (error != EAI_NONAME && error != EAI_SERVICE) { /* * This is a real error, not just "there's * no such service name". * XXX - this doesn't return an error string. */ return 0; } } else { /* * OK, we found it. Did it find anything? */ for (ai = res; ai != NULL; ai = ai->ai_next) { /* * Does it have an address? */ if (ai->ai_addr != NULL) { /* * Yes. Get a port number; we're done. */ if (ai->ai_addr->sa_family == AF_INET) { in4 = (struct sockaddr_in *)ai->ai_addr; tcp_port = ntohs(in4->sin_port); break; } #ifdef INET6 if (ai->ai_addr->sa_family == AF_INET6) { in6 = (struct sockaddr_in6 *)ai->ai_addr; tcp_port = ntohs(in6->sin6_port); break; } #endif } } freeaddrinfo(res); } memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_DGRAM; hints.ai_protocol = IPPROTO_UDP; error = getaddrinfo(NULL, name, &hints, &res); if (error != 0) { if (error != EAI_NONAME && error != EAI_SERVICE) { /* * This is a real error, not just "there's * no such service name". * XXX - this doesn't return an error string. */ return 0; } } else { /* * OK, we found it. Did it find anything? */ for (ai = res; ai != NULL; ai = ai->ai_next) { /* * Does it have an address? */ if (ai->ai_addr != NULL) { /* * Yes. Get a port number; we're done. */ if (ai->ai_addr->sa_family == AF_INET) { in4 = (struct sockaddr_in *)ai->ai_addr; udp_port = ntohs(in4->sin_port); break; } #ifdef INET6 if (ai->ai_addr->sa_family == AF_INET6) { in6 = (struct sockaddr_in6 *)ai->ai_addr; udp_port = ntohs(in6->sin6_port); break; } #endif } } freeaddrinfo(res); } /* * We need to check /etc/services for ambiguous entries. * If we find an ambiguous entry, and it has the * same port number, change the proto to PROTO_UNDEF * so both TCP and UDP will be checked. */ if (tcp_port >= 0) { *port = tcp_port; *proto = IPPROTO_TCP; if (udp_port >= 0) { if (udp_port == tcp_port) *proto = PROTO_UNDEF; #ifdef notdef else /* Can't handle ambiguous names that refer to different port numbers. */ warning("ambiguous port %s in /etc/services", name); #endif } return 1; } if (udp_port >= 0) { *port = udp_port; *proto = IPPROTO_UDP; return 1; } #if defined(ultrix) || defined(__osf__) /* Special hack in case NFS isn't in /etc/services */ if (strcmp(name, "nfs") == 0) { *port = 2049; *proto = PROTO_UNDEF; return 1; } #endif return 0; } /* * Convert a string in the form PPP-PPP, where correspond to ports, to * a starting and ending port in a port range. * Return 0 on failure. */ int pcap_nametoportrange(const char *name, int *port1, int *port2, int *proto) { char *off, *cpy; int save_proto; if ((cpy = strdup(name)) == NULL) return 0; if ((off = strchr(cpy, '-')) == NULL) { free(cpy); return 0; } *off = '\0'; if (pcap_nametoport(cpy, port1, proto) == 0) { free(cpy); return 0; } save_proto = *proto; if (pcap_nametoport(off + 1, port2, proto) == 0) { free(cpy); return 0; } free(cpy); if (*proto != save_proto) *proto = PROTO_UNDEF; return 1; } /* * XXX - not guaranteed to be thread-safe! See below for platforms * on which it is thread-safe and on which it isn't. */ int pcap_nametoproto(const char *str) { struct protoent *p; #if defined(HAVE_LINUX_GETNETBYNAME_R) /* * We have Linux's reentrant getprotobyname_r(). */ struct protoent result_buf; char buf[1024]; /* arbitrary size */ int err; err = getprotobyname_r(str, &result_buf, buf, sizeof buf, &p); if (err != 0) { /* * XXX - dynamically allocate the buffer, and make it * bigger if we get ERANGE back? */ return 0; } #elif defined(HAVE_SOLARIS_IRIX_GETNETBYNAME_R) /* * We have Solaris's and IRIX's reentrant getprotobyname_r(). */ struct protoent result_buf; char buf[1024]; /* arbitrary size */ p = getprotobyname_r(str, &result_buf, buf, (int)sizeof buf); #elif defined(HAVE_AIX_GETNETBYNAME_R) /* * We have AIX's reentrant getprotobyname_r(). */ struct protoent result_buf; struct protoent_data proto_data; if (getprotobyname_r(str, &result_buf, &proto_data) == -1) p = NULL; else p = &result_buf; #else /* * We don't have any getprotobyname_r(); either we have a * getprotobyname() that uses thread-specific data, in which * case we're thread-safe (sufficiently recent FreeBSD, * sufficiently recent Darwin-based OS, sufficiently recent * HP-UX, sufficiently recent Tru64 UNIX, Windows), or we have * the traditional getprotobyname() (everything else, including * current NetBSD and OpenBSD), in which case we're not * thread-safe. */ p = getprotobyname(str); #endif if (p != 0) return p->p_proto; else return PROTO_UNDEF; } #include "ethertype.h" struct eproto { const char *s; u_short p; }; /* * Static data base of ether protocol types. * tcpdump used to import this, and it's declared as an export on * Debian, at least, so make it a public symbol, even though we * don't officially export it by declaring it in a header file. * (Programs *should* do this themselves, as tcpdump now does.) * * We declare it here, right before defining it, to squelch any * warnings we might get from compilers about the lack of a * declaration. */ PCAP_API struct eproto eproto_db[]; PCAP_API_DEF struct eproto eproto_db[] = { { "aarp", ETHERTYPE_AARP }, { "arp", ETHERTYPE_ARP }, { "atalk", ETHERTYPE_ATALK }, { "decnet", ETHERTYPE_DN }, { "ip", ETHERTYPE_IP }, #ifdef INET6 { "ip6", ETHERTYPE_IPV6 }, #endif { "lat", ETHERTYPE_LAT }, { "loopback", ETHERTYPE_LOOPBACK }, { "mopdl", ETHERTYPE_MOPDL }, { "moprc", ETHERTYPE_MOPRC }, { "rarp", ETHERTYPE_REVARP }, { "sca", ETHERTYPE_SCA }, { (char *)0, 0 } }; int pcap_nametoeproto(const char *s) { struct eproto *p = eproto_db; while (p->s != 0) { if (strcmp(p->s, s) == 0) return p->p; p += 1; } return PROTO_UNDEF; } #include "llc.h" /* Static data base of LLC values. */ static struct eproto llc_db[] = { { "iso", LLCSAP_ISONS }, { "stp", LLCSAP_8021D }, { "ipx", LLCSAP_IPX }, { "netbeui", LLCSAP_NETBEUI }, { (char *)0, 0 } }; int pcap_nametollc(const char *s) { struct eproto *p = llc_db; while (p->s != 0) { if (strcmp(p->s, s) == 0) return p->p; p += 1; } return PROTO_UNDEF; } /* Hex digit to 8-bit unsigned integer. */ static inline u_char pcapint_xdtoi(u_char c) { if (c >= '0' && c <= '9') return (u_char)(c - '0'); else if (c >= 'a' && c <= 'f') return (u_char)(c - 'a' + 10); else return (u_char)(c - 'A' + 10); } int __pcap_atoin(const char *s, bpf_u_int32 *addr) { u_int n; int len; *addr = 0; len = 0; for (;;) { n = 0; while (*s && *s != '.') { if (n > 25) { /* The result will be > 255 */ return -1; } n = n * 10 + *s++ - '0'; } if (n > 255) return -1; *addr <<= 8; *addr |= n & 0xff; len += 8; if (*s == '\0') return len; ++s; } /* NOTREACHED */ } int __pcap_atodn(const char *s, bpf_u_int32 *addr) { #define AREASHIFT 10 #define AREAMASK 0176000 #define NODEMASK 01777 u_int node, area; if (sscanf(s, "%d.%d", &area, &node) != 2) return(0); *addr = (area << AREASHIFT) & AREAMASK; *addr |= (node & NODEMASK); return(32); } /* * libpcap ARCnet address format is "^\$[0-9a-fA-F]{1,2}$" in regexp syntax. * Iff the given string is a well-formed ARCnet address, parse the string, * store the 8-bit unsigned value into the provided integer and return 1. * Otherwise return 0. * * --> START -- $ --> DOLLAR -- [0-9a-fA-F] --> HEX1 -- \0 -->-+ * | | | | * [.] [.] [0-9a-fA-F] | * | | | | * v v v v * (invalid) <--------+-<---------------[.]-- HEX2 -- \0 -->-+--> (valid) */ int pcapint_atoan(const char *s, uint8_t *addr) { enum { START, DOLLAR, HEX1, HEX2, } fsm_state = START; uint8_t tmp = 0; while (*s) { switch (fsm_state) { case START: if (*s != '$') goto invalid; fsm_state = DOLLAR; break; case DOLLAR: if (! PCAP_ISXDIGIT(*s)) goto invalid; tmp = pcapint_xdtoi(*s); fsm_state = HEX1; break; case HEX1: if (! PCAP_ISXDIGIT(*s)) goto invalid; tmp <<= 4; tmp |= pcapint_xdtoi(*s); fsm_state = HEX2; break; case HEX2: goto invalid; } // switch s++; } // while if (fsm_state == HEX1 || fsm_state == HEX2) { *addr = tmp; return 1; } invalid: return 0; } // Man page: "xxxxxxxxxxxx", regexp: "^[0-9a-fA-F]{12}$". static u_char pcapint_atomac48_xxxxxxxxxxxx(const char *s, uint8_t *addr) { if (strlen(s) == 12 && PCAP_ISXDIGIT(s[0]) && PCAP_ISXDIGIT(s[1]) && PCAP_ISXDIGIT(s[2]) && PCAP_ISXDIGIT(s[3]) && PCAP_ISXDIGIT(s[4]) && PCAP_ISXDIGIT(s[5]) && PCAP_ISXDIGIT(s[6]) && PCAP_ISXDIGIT(s[7]) && PCAP_ISXDIGIT(s[8]) && PCAP_ISXDIGIT(s[9]) && PCAP_ISXDIGIT(s[10]) && PCAP_ISXDIGIT(s[11])) { addr[0] = pcapint_xdtoi(s[0]) << 4 | pcapint_xdtoi(s[1]); addr[1] = pcapint_xdtoi(s[2]) << 4 | pcapint_xdtoi(s[3]); addr[2] = pcapint_xdtoi(s[4]) << 4 | pcapint_xdtoi(s[5]); addr[3] = pcapint_xdtoi(s[6]) << 4 | pcapint_xdtoi(s[7]); addr[4] = pcapint_xdtoi(s[8]) << 4 | pcapint_xdtoi(s[9]); addr[5] = pcapint_xdtoi(s[10]) << 4 | pcapint_xdtoi(s[11]); return 1; } return 0; } // Man page: "xxxx.xxxx.xxxx", regexp: "^[0-9a-fA-F]{4}(\.[0-9a-fA-F]{4}){2}$". static u_char pcapint_atomac48_xxxx_3_times(const char *s, uint8_t *addr) { const char sep = '.'; if (strlen(s) == 14 && PCAP_ISXDIGIT(s[0]) && PCAP_ISXDIGIT(s[1]) && PCAP_ISXDIGIT(s[2]) && PCAP_ISXDIGIT(s[3]) && s[4] == sep && PCAP_ISXDIGIT(s[5]) && PCAP_ISXDIGIT(s[6]) && PCAP_ISXDIGIT(s[7]) && PCAP_ISXDIGIT(s[8]) && s[9] == sep && PCAP_ISXDIGIT(s[10]) && PCAP_ISXDIGIT(s[11]) && PCAP_ISXDIGIT(s[12]) && PCAP_ISXDIGIT(s[13])) { addr[0] = pcapint_xdtoi(s[0]) << 4 | pcapint_xdtoi(s[1]); addr[1] = pcapint_xdtoi(s[2]) << 4 | pcapint_xdtoi(s[3]); addr[2] = pcapint_xdtoi(s[5]) << 4 | pcapint_xdtoi(s[6]); addr[3] = pcapint_xdtoi(s[7]) << 4 | pcapint_xdtoi(s[8]); addr[4] = pcapint_xdtoi(s[10]) << 4 | pcapint_xdtoi(s[11]); addr[5] = pcapint_xdtoi(s[12]) << 4 | pcapint_xdtoi(s[13]); return 1; } return 0; } /* * Man page: "xx:xx:xx:xx:xx:xx", regexp: "^[0-9a-fA-F]{1,2}(:[0-9a-fA-F]{1,2}){5}$". * Man page: "xx-xx-xx-xx-xx-xx", regexp: "^[0-9a-fA-F]{1,2}(-[0-9a-fA-F]{1,2}){5}$". * Man page: "xx.xx.xx.xx.xx.xx", regexp: "^[0-9a-fA-F]{1,2}(\.[0-9a-fA-F]{1,2}){5}$". * (Any "xx" above can be "x", which is equivalent to "0x".) * * An equivalent (and parametrisable for EUI-64) FSM could be implemented using * a smaller graph, but that graph would be neither acyclic nor planar nor * trivial to verify. * * | * [.] v * +<---------- START * | | * | | [0-9a-fA-F] * | [.] v * +<--------- BYTE0_X ----------+ * | | | * | | [0-9a-fA-F] | * | [.] v | * +<--------- BYTE0_XX | [:\.-] * | | | * | | [:\.-] | * | [.] v | * +<----- BYTE0_SEP_BYTE1 <-----+ * | | * | | [0-9a-fA-F] * | [.] v * +<--------- BYTE1_X ----------+ * | | | * | | [0-9a-fA-F] | * | [.] v | * +<--------- BYTE1_XX | * | | | * | | | * | [.] v | * +<----- BYTE1_SEP_BYTE2 <-----+ * | | * | | [0-9a-fA-F] * | [.] v * +<--------- BYTE2_X ----------+ * | | | * | | [0-9a-fA-F] | * | [.] v | * +<--------- BYTE2_XX | * | | | * | | | * | [.] v | * +<----- BYTE2_SEP_BYTE3 <-----+ * | | * | | [0-9a-fA-F] * | [.] v * +<--------- BYTE3_X ----------+ * | | | * | | [0-9a-fA-F] | * | [.] v | * +<--------- BYTE3_XX | * | | | * | | | * | [.] v | * +<----- BYTE3_SEP_BYTE4 <-----+ * | | * | | [0-9a-fA-F] * | [.] v * +<--------- BYTE4_X ----------+ * | | | * | | [0-9a-fA-F] | * | [.] v | * +<--------- BYTE4_XX | * | | | * | | | * | [.] v | * +<----- BYTE4_SEP_BYTE5 <-----+ * | | * | | [0-9a-fA-F] * | [.] v * +<--------- BYTE5_X ----------+ * | | | * | | [0-9a-fA-F] | * | [.] v | * +<--------- BYTE5_XX | \0 * | | | * | | \0 | * | | v * +--> (reject) +---------> (accept) * */ static u_char pcapint_atomac48_x_xx_6_times(const char *s, uint8_t *addr) { enum { START, BYTE0_X, BYTE0_XX, BYTE0_SEP_BYTE1, BYTE1_X, BYTE1_XX, BYTE1_SEP_BYTE2, BYTE2_X, BYTE2_XX, BYTE2_SEP_BYTE3, BYTE3_X, BYTE3_XX, BYTE3_SEP_BYTE4, BYTE4_X, BYTE4_XX, BYTE4_SEP_BYTE5, BYTE5_X, BYTE5_XX, } fsm_state = START; uint8_t buf[6]; const char *seplist = ":.-"; char sep; while (*s) { switch (fsm_state) { case START: if (PCAP_ISXDIGIT(*s)) { buf[0] = pcapint_xdtoi(*s); fsm_state = BYTE0_X; break; } goto reject; case BYTE0_X: if (strchr(seplist, *s)) { sep = *s; fsm_state = BYTE0_SEP_BYTE1; break; } if (PCAP_ISXDIGIT(*s)) { buf[0] = buf[0] << 4 | pcapint_xdtoi(*s); fsm_state = BYTE0_XX; break; } goto reject; case BYTE0_XX: if (strchr(seplist, *s)) { sep = *s; fsm_state = BYTE0_SEP_BYTE1; break; } goto reject; case BYTE0_SEP_BYTE1: if (PCAP_ISXDIGIT(*s)) { buf[1] = pcapint_xdtoi(*s); fsm_state = BYTE1_X; break; } goto reject; case BYTE1_X: if (*s == sep) { fsm_state = BYTE1_SEP_BYTE2; break; } if (PCAP_ISXDIGIT(*s)) { buf[1] = buf[1] << 4 | pcapint_xdtoi(*s); fsm_state = BYTE1_XX; break; } goto reject; case BYTE1_XX: if (*s == sep) { fsm_state = BYTE1_SEP_BYTE2; break; } goto reject; case BYTE1_SEP_BYTE2: if (PCAP_ISXDIGIT(*s)) { buf[2] = pcapint_xdtoi(*s); fsm_state = BYTE2_X; break; } goto reject; case BYTE2_X: if (*s == sep) { fsm_state = BYTE2_SEP_BYTE3; break; } if (PCAP_ISXDIGIT(*s)) { buf[2] = buf[2] << 4 | pcapint_xdtoi(*s); fsm_state = BYTE2_XX; break; } goto reject; case BYTE2_XX: if (*s == sep) { fsm_state = BYTE2_SEP_BYTE3; break; } goto reject; case BYTE2_SEP_BYTE3: if (PCAP_ISXDIGIT(*s)) { buf[3] = pcapint_xdtoi(*s); fsm_state = BYTE3_X; break; } goto reject; case BYTE3_X: if (*s == sep) { fsm_state = BYTE3_SEP_BYTE4; break; } if (PCAP_ISXDIGIT(*s)) { buf[3] = buf[3] << 4 | pcapint_xdtoi(*s); fsm_state = BYTE3_XX; break; } goto reject; case BYTE3_XX: if (*s == sep) { fsm_state = BYTE3_SEP_BYTE4; break; } goto reject; case BYTE3_SEP_BYTE4: if (PCAP_ISXDIGIT(*s)) { buf[4] = pcapint_xdtoi(*s); fsm_state = BYTE4_X; break; } goto reject; case BYTE4_X: if (*s == sep) { fsm_state = BYTE4_SEP_BYTE5; break; } if (PCAP_ISXDIGIT(*s)) { buf[4] = buf[4] << 4 | pcapint_xdtoi(*s); fsm_state = BYTE4_XX; break; } goto reject; case BYTE4_XX: if (*s == sep) { fsm_state = BYTE4_SEP_BYTE5; break; } goto reject; case BYTE4_SEP_BYTE5: if (PCAP_ISXDIGIT(*s)) { buf[5] = pcapint_xdtoi(*s); fsm_state = BYTE5_X; break; } goto reject; case BYTE5_X: if (PCAP_ISXDIGIT(*s)) { buf[5] = buf[5] << 4 | pcapint_xdtoi(*s); fsm_state = BYTE5_XX; break; } goto reject; case BYTE5_XX: goto reject; } // switch s++; } // while if (fsm_state == BYTE5_X || fsm_state == BYTE5_XX) { // accept memcpy(addr, buf, sizeof(buf)); return 1; } reject: return 0; } // The 'addr' argument must point to an array of at least 6 elements. static int pcapint_atomac48(const char *s, uint8_t *addr) { return s && ( pcapint_atomac48_xxxxxxxxxxxx(s, addr) || pcapint_atomac48_xxxx_3_times(s, addr) || pcapint_atomac48_x_xx_6_times(s, addr) ); } /* * If 's' is a MAC-48 address in one of the forms documented in pcap-filter(7) * for "ether host", return a pointer to an allocated buffer with the binary * value of the address. Return NULL on any error. */ u_char * pcap_ether_aton(const char *s) { uint8_t tmp[6]; if (! pcapint_atomac48(s, tmp)) return (NULL); u_char *e = malloc(6); if (e == NULL) return (NULL); memcpy(e, tmp, sizeof(tmp)); return (e); } #ifndef HAVE_ETHER_HOSTTON /* * Roll our own. * * This should be thread-safe, as we define the static variables * we use to be thread-local, and as pcap_next_etherent() does so * as well. */ u_char * pcap_ether_hostton(const char *name) { register struct pcap_etherent *ep; register u_char *ap; static thread_local FILE *fp = NULL; static thread_local int init = 0; if (!init) { fp = fopen(PCAP_ETHERS_FILE, "r"); ++init; if (fp == NULL) return (NULL); } else if (fp == NULL) return (NULL); else rewind(fp); while ((ep = pcap_next_etherent(fp)) != NULL) { if (strcmp(ep->name, name) == 0) { ap = (u_char *)malloc(6); if (ap != NULL) { memcpy(ap, ep->addr, 6); return (ap); } break; } } return (NULL); } #else /* * Use the OS-supplied routine. * This *should* be thread-safe; the API doesn't have a static buffer. */ u_char * pcap_ether_hostton(const char *name) { register u_char *ap; u_char a[6]; char namebuf[1024]; /* * In AIX 7.1 and 7.2: int ether_hostton(char *, struct ether_addr *); */ pcapint_strlcpy(namebuf, name, sizeof(namebuf)); ap = NULL; if (ether_hostton(namebuf, (struct ether_addr *)a) == 0) { ap = (u_char *)malloc(6); if (ap != NULL) memcpy((char *)ap, (char *)a, 6); } return (ap); } #endif /* * XXX - not guaranteed to be thread-safe! */ int #ifdef DECNETLIB __pcap_nametodnaddr(const char *name, u_short *res) { struct nodeent *getnodebyname(); struct nodeent *nep; nep = getnodebyname(name); if (nep == ((struct nodeent *)0)) return(0); memcpy((char *)res, (char *)nep->n_addr, sizeof(unsigned short)); return(1); #else __pcap_nametodnaddr(const char *name _U_, u_short *res _U_) { return(0); #endif }