diff options
Diffstat (limited to 'usr.sbin/tcpdump/tcpdump/nametoaddr.c')
| -rw-r--r-- | usr.sbin/tcpdump/tcpdump/nametoaddr.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/usr.sbin/tcpdump/tcpdump/nametoaddr.c b/usr.sbin/tcpdump/tcpdump/nametoaddr.c new file mode 100644 index 000000000000..6f2330f141c1 --- /dev/null +++ b/usr.sbin/tcpdump/tcpdump/nametoaddr.c @@ -0,0 +1,258 @@ +/* + * Copyright (c) 1988-1990 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. + */ + +#ifndef lint +static char rcsid[] = + "@(#) $Header: nametoaddr.c,v 1.9 91/02/04 16:56:46 mccanne Exp $ (LBL)"; +#endif + +#include <stdio.h> +#include <ctype.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <net/if.h> +#include <netdb.h> +#include <netinet/in.h> +#include <netinet/if_ether.h> +#include <errno.h> +#include <arpa/inet.h> + +#ifdef ultrix +#include <sys/time.h> +#include <rpc/types.h> +#include <nfs/nfs.h> +#endif + +#include "interface.h" +#include "etherent.h" +#include "nametoaddr.h" + +/* + * Convert host name to internet address. + * Return 0 upon failure. + */ +u_long ** +s_nametoaddr(name) + char *name; +{ +#ifndef h_addr + static u_long *hlist[2]; +#endif + u_long **p; + struct hostent *hp; + + if (hp = gethostbyname(name)) { +#ifndef h_addr + hlist[0] = (u_long *)hp->h_addr; + NTOHL(hp->h_addr); + return hlist; +#else + for (p = (u_long **)hp->h_addr_list; *p; ++p) + NTOHL(**p); + return (u_long **)hp->h_addr_list; +#endif + } + else + return 0; +} + +/* + * Convert net name to internet address. + * Return 0 upon failure. + */ +u_long +s_nametonetaddr(name) + char *name; +{ + struct netent *np; + + if (np = getnetbyname(name)) + return np->n_net; + else + return 0; +} + +/* + * Convert a port name to its port and protocol numbers. + * We assume only TCP or UDP. + * Return 0 upon failure. + */ +s_nametoport(name, port, proto) + char *name; + int *port; + int *proto; +{ + struct servent *sp; + char *other; + + sp = getservbyname(name, (char *)0); + if (sp != 0) { + NTOHS(sp->s_port); + *port = sp->s_port; + *proto = s_nametoproto(sp->s_proto); + /* + * We need to check /etc/services for ambiguous entries. + * If we find the ambiguous entry, and it has the + * same port number, change the proto to PROTO_UNDEF + * so both TCP and UDP will be checked. + */ + if (*proto == IPPROTO_TCP) + other = "udp"; + else + other = "tcp"; + + sp = getservbyname(name, other); + if (sp != 0) { + NTOHS(sp->s_port); + if (*port != sp->s_port) + /* Can't handle ambigous names that refer + to different port numbers. */ + warning("ambiguous port %s in /etc/services", + name); + *proto = PROTO_UNDEF; + } + return 1; + } +#ifdef ultrix + /* Special hack in case NFS isn't in /etc/services */ + if (strcmp(name, "nfs") == 0) { + *port = NFS_PORT; + *proto = PROTO_UNDEF; + return 1; + } +#endif + return 0; +} + +int +s_nametoproto(str) + char *str; +{ + struct protoent *p; + + p = getprotobyname(str); + if (p != 0) + return p->p_proto; + else + return PROTO_UNDEF; +} + +#include "etherproto.h" + +int +s_nametoeproto(s) + 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; +} + +/* Hex digit to integer. */ +static inline int +xdtoi(c) +{ + if (isdigit(c)) + return c - '0'; + else if (islower(c)) + return c - 'a' + 10; + else + return c - 'A' + 10; +} + +u_long +atoin(s) + char *s; +{ + u_long addr = 0; + u_int n; + + while (1) { + n = 0; + while (*s && *s != '.') + n = n * 10 + *s++ - '0'; + addr <<= 8; + addr |= n & 0xff; + if (*s == '\0') + return addr; + ++s; + } + /* NOTREACHED */ +} + + +/* + * Convert 's' which has the form "xx:xx:xx:xx:xx:xx" into a new + * ethernet address. Assumes 's' is well formed. + */ +u_char * +ETHER_aton(s) + char *s; +{ + register u_char *ep, *e; + register u_int d; + + e = ep = (u_char *)malloc(6); + + while (*s) { + if (*s == ':') + s += 1; + d = xdtoi(*s++); + if (isxdigit(*s)) { + d <<= 4; + d |= xdtoi(*s++); + } + *ep++ = d; + } + + return e; +} + +#ifndef ETHER_SERVICE +u_char * +ETHER_hostton(name) + char *name; +{ + struct etherent *ep; + FILE *fp; + u_char *ap; + + fp = fopen(ETHERS_FILE, "r"); + if (fp != 0) { + while (ep = next_etherent(fp)) { + if (strcmp(ep->name, name) == 0) { + ap = (u_char *)malloc(6); + bcopy(ep->addr, ap, 6); + return ap; + } + } + } + return (u_char *)0; +} +#endif |