822 lines
18 KiB
C
822 lines
18 KiB
C
/* $NetBSD: natparse.c,v 1.4 2000/08/09 21:03:03 veego Exp $ */
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/*
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* Copyright (C) 1993-2000 by Darren Reed.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that this notice is preserved and due credit is given
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* to the original author and the contributors.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/types.h>
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#if !defined(__SVR4) && !defined(__svr4__)
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#include <strings.h>
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#else
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#include <sys/byteorder.h>
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#endif
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#include <sys/time.h>
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#include <sys/param.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stddef.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#if defined(sun) && (defined(__svr4__) || defined(__SVR4))
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# include <sys/ioccom.h>
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# include <sys/sysmacros.h>
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#endif
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/tcp.h>
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#include <net/if.h>
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#if __FreeBSD_version >= 300000
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# include <net/if_var.h>
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#endif
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#include <netdb.h>
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#include <arpa/nameser.h>
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#include <arpa/inet.h>
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#include <resolv.h>
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#include <ctype.h>
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#include "netinet/ip_compat.h"
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#include "netinet/ip_fil.h"
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#include "netinet/ip_proxy.h"
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#include "netinet/ip_nat.h"
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#include "ipf.h"
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#if defined(sun) && !SOLARIS2
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# define STRERROR(x) sys_errlist[x]
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extern char *sys_errlist[];
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#else
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# define STRERROR(x) strerror(x)
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#endif
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#if !defined(lint)
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static const char sccsid[] ="@(#)ipnat.c 1.9 6/5/96 (C) 1993 Darren Reed";
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static const char rcsid[] = "@(#)Id: natparse.c,v 1.17.2.6 2000/07/08 02:14:40 darrenr Exp";
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#endif
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#if SOLARIS
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#define bzero(a,b) memset(a,0,b)
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#endif
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extern int countbits __P((u_32_t));
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extern char *proto;
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ipnat_t *natparse __P((char *, int));
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void printnat __P((ipnat_t *, int, void *));
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void natparsefile __P((int, char *, int));
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void nat_setgroupmap __P((struct ipnat *));
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void printnat(np, opts, ptr)
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ipnat_t *np;
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int opts;
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void *ptr;
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{
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struct protoent *pr;
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struct servent *sv;
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int bits;
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switch (np->in_redir)
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{
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case NAT_REDIRECT :
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printf("rdr");
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break;
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case NAT_MAP :
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printf("map");
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break;
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case NAT_MAPBLK :
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printf("map-block");
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break;
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case NAT_BIMAP :
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printf("bimap");
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break;
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default :
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fprintf(stderr, "unknown value for in_redir: %#x\n",
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np->in_redir);
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break;
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}
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printf(" %s ", np->in_ifname);
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if (np->in_flags & IPN_FILTER) {
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if (np->in_flags & IPN_NOTSRC)
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printf("! ");
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printf("from ");
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if (np->in_redir == NAT_REDIRECT) {
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printhostmask(4, (u_32_t *)&np->in_srcip,
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(u_32_t *)&np->in_srcmsk);
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if (np->in_scmp)
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printportcmp(np->in_p, &np->in_tuc.ftu_src);
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} else {
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printhostmask(4, (u_32_t *)&np->in_inip,
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(u_32_t *)&np->in_inmsk);
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if (np->in_dcmp)
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printportcmp(np->in_p, &np->in_tuc.ftu_dst);
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}
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if (np->in_flags & IPN_NOTDST)
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printf(" !");
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printf(" to ");
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if (np->in_redir == NAT_REDIRECT) {
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printhostmask(4, (u_32_t *)&np->in_outip,
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(u_32_t *)&np->in_outmsk);
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if (np->in_dcmp)
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printportcmp(np->in_p, &np->in_tuc.ftu_dst);
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} else {
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printhostmask(4, (u_32_t *)&np->in_srcip,
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(u_32_t *)&np->in_srcmsk);
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if (np->in_scmp)
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printportcmp(np->in_p, &np->in_tuc.ftu_src);
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}
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}
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if (np->in_redir == NAT_REDIRECT) {
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if (!(np->in_flags & IPN_FILTER)) {
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printf("%s", inet_ntoa(np->in_out[0]));
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bits = countbits(np->in_out[1].s_addr);
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if (bits != -1)
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printf("/%d ", bits);
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else
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printf("/%s ", inet_ntoa(np->in_out[1]));
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if (np->in_pmin)
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printf("port %d", ntohs(np->in_pmin));
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if (np->in_pmax != np->in_pmin)
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printf("- %d", ntohs(np->in_pmax));
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}
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printf(" -> %s", inet_ntoa(np->in_in[0]));
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if (np->in_flags & IPN_SPLIT)
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printf(",%s", inet_ntoa(np->in_in[1]));
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if (np->in_pnext)
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printf(" port %d", ntohs(np->in_pnext));
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if ((np->in_flags & IPN_TCPUDP) == IPN_TCPUDP)
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printf(" tcp/udp");
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else if ((np->in_flags & IPN_TCP) == IPN_TCP)
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printf(" tcp");
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else if ((np->in_flags & IPN_UDP) == IPN_UDP)
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printf(" udp");
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if (np->in_flags & IPN_ROUNDR)
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printf(" round-robin");
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printf("\n");
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if (opts & OPT_DEBUG)
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printf("\t%p %lu %#x %u %p %d\n", np->in_ifp,
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np->in_space, np->in_flags, np->in_pmax, np,
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np->in_use);
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} else {
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np->in_nextip.s_addr = htonl(np->in_nextip.s_addr);
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if (!(np->in_flags & IPN_FILTER)) {
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printf("%s/", inet_ntoa(np->in_in[0]));
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bits = countbits(np->in_in[1].s_addr);
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if (bits != -1)
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printf("%d ", bits);
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else
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printf("%s", inet_ntoa(np->in_in[1]));
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}
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printf(" -> ");
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if (np->in_flags & IPN_IPRANGE) {
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printf("range %s-", inet_ntoa(np->in_out[0]));
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printf("%s", inet_ntoa(np->in_out[1]));
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} else {
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printf("%s/", inet_ntoa(np->in_out[0]));
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bits = countbits(np->in_out[1].s_addr);
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if (bits != -1)
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printf("%d ", bits);
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else
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printf("%s", inet_ntoa(np->in_out[1]));
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}
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if (*np->in_plabel) {
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pr = getprotobynumber(np->in_p);
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printf(" proxy port");
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if (np->in_dport != 0) {
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if (pr != NULL)
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sv = getservbyport(np->in_dport,
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pr->p_name);
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else
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sv = getservbyport(np->in_dport, NULL);
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if (sv != NULL)
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printf(" %s", sv->s_name);
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else
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printf(" %hu", ntohs(np->in_dport));
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}
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printf(" %.*s/", (int)sizeof(np->in_plabel),
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np->in_plabel);
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if (pr != NULL)
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fputs(pr->p_name, stdout);
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else
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printf("%d", np->in_p);
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} else if (np->in_redir == NAT_MAPBLK) {
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printf(" ports %d", np->in_pmin);
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if (opts & OPT_VERBOSE)
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printf("\n\tip modulous %d", np->in_pmax);
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} else if (np->in_pmin || np->in_pmax) {
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printf(" portmap");
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if (np->in_flags & IPN_AUTOPORTMAP) {
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printf(" auto");
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if (opts & OPT_DEBUG)
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printf(" [%d:%d %d %d]",
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ntohs(np->in_pmin),
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ntohs(np->in_pmax),
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np->in_ippip, np->in_ppip);
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} else {
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if ((np->in_flags & IPN_TCPUDP) == IPN_TCPUDP)
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printf(" tcp/udp");
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else if (np->in_flags & IPN_TCP)
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printf(" tcp");
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else if (np->in_flags & IPN_UDP)
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printf(" udp");
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printf(" %d:%d", ntohs(np->in_pmin),
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ntohs(np->in_pmax));
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}
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}
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printf("\n");
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if (opts & OPT_DEBUG) {
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printf("\tifp %p space %lu nextip %s pnext %d",
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np->in_ifp, np->in_space,
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inet_ntoa(np->in_nextip), np->in_pnext);
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printf(" flags %x use %u\n",
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np->in_flags, np->in_use);
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}
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}
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}
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void nat_setgroupmap(n)
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ipnat_t *n;
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{
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if (n->in_outmsk == n->in_inmsk)
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n->in_ippip = 1;
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else if (n->in_flags & IPN_AUTOPORTMAP) {
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n->in_ippip = ~ntohl(n->in_inmsk);
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if (n->in_outmsk != 0xffffffff)
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n->in_ippip /= (~ntohl(n->in_outmsk) + 1);
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n->in_ippip++;
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if (n->in_ippip == 0)
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n->in_ippip = 1;
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n->in_ppip = USABLE_PORTS / n->in_ippip;
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} else {
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n->in_space = USABLE_PORTS * ~ntohl(n->in_outmsk);
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n->in_nip = 0;
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if (!(n->in_ppip = n->in_pmin))
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n->in_ppip = 1;
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n->in_ippip = USABLE_PORTS / n->in_ppip;
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}
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}
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ipnat_t *natparse(line, linenum)
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char *line;
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int linenum;
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{
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static ipnat_t ipn;
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struct protoent *pr;
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char *dnetm = NULL, *dport = NULL;
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char *s, *t, *cps[31], **cpp;
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int i, cnt;
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if ((s = strchr(line, '\n')))
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*s = '\0';
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if ((s = strchr(line, '#')))
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*s = '\0';
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while (*line && isspace(*line))
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line++;
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if (!*line)
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return NULL;
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bzero((char *)&ipn, sizeof(ipn));
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cnt = 0;
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for (i = 0, *cps = strtok(line, " \b\t\r\n"); cps[i] && i < 30; cnt++)
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cps[++i] = strtok(NULL, " \b\t\r\n");
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cps[i] = NULL;
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if (cnt < 3) {
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fprintf(stderr, "%d: not enough segments in line\n", linenum);
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return NULL;
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}
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cpp = cps;
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if (!strcasecmp(*cpp, "map"))
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ipn.in_redir = NAT_MAP;
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else if (!strcasecmp(*cpp, "map-block"))
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ipn.in_redir = NAT_MAPBLK;
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else if (!strcasecmp(*cpp, "rdr"))
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ipn.in_redir = NAT_REDIRECT;
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else if (!strcasecmp(*cpp, "bimap"))
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ipn.in_redir = NAT_BIMAP;
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else {
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fprintf(stderr, "%d: unknown mapping: \"%s\"\n",
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linenum, *cpp);
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return NULL;
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}
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cpp++;
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strncpy(ipn.in_ifname, *cpp, sizeof(ipn.in_ifname) - 1);
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ipn.in_ifname[sizeof(ipn.in_ifname) - 1] = '\0';
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cpp++;
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if (!strcasecmp(*cpp, "from") || (**cpp == '!')) {
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if (!strcmp(*cpp, "!")) {
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cpp++;
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if (strcasecmp(*cpp, "from")) {
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fprintf(stderr, "Missing from after !\n");
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return NULL;
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}
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ipn.in_flags |= IPN_NOTSRC;
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} else if (**cpp == '!') {
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if (strcasecmp(*cpp + 1, "from")) {
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fprintf(stderr, "Missing from after !\n");
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return NULL;
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}
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ipn.in_flags |= IPN_NOTSRC;
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}
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if ((ipn.in_flags & IPN_NOTSRC) &&
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(ipn.in_redir & (NAT_MAP|NAT_MAPBLK))) {
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fprintf(stderr, "Cannot use '! from' with map\n");
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return NULL;
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}
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ipn.in_flags |= IPN_FILTER;
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cpp++;
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if (ipn.in_redir == NAT_REDIRECT) {
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if (hostmask(&cpp, (u_32_t *)&ipn.in_srcip,
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(u_32_t *)&ipn.in_srcmsk,
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&ipn.in_sport, &ipn.in_scmp,
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&ipn.in_stop, linenum)) {
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return NULL;
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}
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} else {
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if (hostmask(&cpp, (u_32_t *)&ipn.in_inip,
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(u_32_t *)&ipn.in_inmsk,
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&ipn.in_sport, &ipn.in_scmp,
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&ipn.in_stop, linenum)) {
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return NULL;
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}
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}
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if (!strcmp(*cpp, "!")) {
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cpp++;
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ipn.in_flags |= IPN_NOTDST;
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} else if (**cpp == '!') {
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(*cpp)++;
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ipn.in_flags |= IPN_NOTDST;
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}
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if (strcasecmp(*cpp, "to")) {
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fprintf(stderr, "%d: unexpected keyword (%s) - to\n",
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linenum, *cpp);
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return NULL;
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}
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if ((ipn.in_flags & IPN_NOTDST) &&
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(ipn.in_redir & (NAT_REDIRECT))) {
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fprintf(stderr, "Cannot use '! to' with rdr\n");
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return NULL;
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}
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if (!*++cpp) {
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fprintf(stderr, "%d: missing host after to\n", linenum);
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return NULL;
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}
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if (ipn.in_redir == NAT_REDIRECT) {
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if (hostmask(&cpp, (u_32_t *)&ipn.in_outip,
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(u_32_t *)&ipn.in_outmsk,
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&ipn.in_dport, &ipn.in_dcmp,
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&ipn.in_dtop, linenum)) {
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return NULL;
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}
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ipn.in_pmin = htons(ipn.in_dport);
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} else {
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if (hostmask(&cpp, (u_32_t *)&ipn.in_srcip,
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(u_32_t *)&ipn.in_srcmsk,
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&ipn.in_dport, &ipn.in_dcmp,
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&ipn.in_dtop, linenum)) {
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return NULL;
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}
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}
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} else {
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s = *cpp;
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if (!s)
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return NULL;
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t = strchr(s, '/');
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if (!t)
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return NULL;
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*t++ = '\0';
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if (ipn.in_redir == NAT_REDIRECT) {
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if (hostnum((u_32_t *)&ipn.in_outip, s, linenum) == -1)
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return NULL;
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if (genmask(t, (u_32_t *)&ipn.in_outmsk) == -1) {
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return NULL;
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}
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} else {
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if (hostnum((u_32_t *)&ipn.in_inip, s, linenum) == -1)
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return NULL;
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if (genmask(t, (u_32_t *)&ipn.in_inmsk) == -1) {
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return NULL;
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}
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}
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cpp++;
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if (!*cpp)
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return NULL;
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}
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if ((ipn.in_redir == NAT_REDIRECT) && !(ipn.in_flags & IPN_FILTER)) {
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if (strcasecmp(*cpp, "port")) {
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fprintf(stderr, "%d: missing fields - 1st port\n",
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linenum);
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return NULL;
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}
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cpp++;
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if (!*cpp) {
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fprintf(stderr,
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"%d: missing fields (destination port)\n",
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linenum);
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return NULL;
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}
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if (isdigit(**cpp) && (s = strchr(*cpp, '-')))
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*s++ = '\0';
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else
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s = NULL;
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if (!portnum(*cpp, &ipn.in_pmin, linenum))
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return NULL;
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ipn.in_pmin = htons(ipn.in_pmin);
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cpp++;
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if (!strcmp(*cpp, "-")) {
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cpp++;
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s = *cpp++;
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}
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if (s) {
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if (!portnum(s, &ipn.in_pmax, linenum))
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return NULL;
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ipn.in_pmax = htons(ipn.in_pmax);
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} else
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ipn.in_pmax = ipn.in_pmin;
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}
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if (!*cpp) {
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fprintf(stderr, "%d: missing fields (->)\n", linenum);
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return NULL;
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}
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if (strcmp(*cpp, "->")) {
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fprintf(stderr, "%d: missing ->\n", linenum);
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return NULL;
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}
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cpp++;
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if (!*cpp) {
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fprintf(stderr, "%d: missing fields (%s)\n",
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linenum, ipn.in_redir ? "destination" : "target");
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return NULL;
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}
|
|
|
|
if (ipn.in_redir == NAT_MAP) {
|
|
if (!strcasecmp(*cpp, "range")) {
|
|
cpp++;
|
|
ipn.in_flags |= IPN_IPRANGE;
|
|
if (!*cpp) {
|
|
fprintf(stderr, "%d: missing fields (%s)\n",
|
|
linenum,
|
|
ipn.in_redir ? "destination":"target");
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (ipn.in_flags & IPN_IPRANGE) {
|
|
dnetm = strrchr(*cpp, '-');
|
|
if (dnetm == NULL) {
|
|
cpp++;
|
|
if (*cpp && !strcmp(*cpp, "-") && *(cpp + 1))
|
|
dnetm = *(cpp + 1);
|
|
} else
|
|
*dnetm++ = '\0';
|
|
if (dnetm == NULL || *dnetm == '\0') {
|
|
fprintf(stderr,
|
|
"%d: desination range not specified\n",
|
|
linenum);
|
|
return NULL;
|
|
}
|
|
} else if (ipn.in_redir != NAT_REDIRECT) {
|
|
dnetm = strrchr(*cpp, '/');
|
|
if (dnetm == NULL) {
|
|
cpp++;
|
|
if (*cpp && !strcasecmp(*cpp, "netmask"))
|
|
dnetm = *++cpp;
|
|
}
|
|
if (dnetm == NULL) {
|
|
fprintf(stderr,
|
|
"%d: missing fields (dest netmask)\n",
|
|
linenum);
|
|
return NULL;
|
|
}
|
|
if (*dnetm == '/')
|
|
*dnetm++ = '\0';
|
|
}
|
|
|
|
if (ipn.in_redir == NAT_REDIRECT) {
|
|
dnetm = strchr(*cpp, ',');
|
|
if (dnetm != NULL) {
|
|
ipn.in_flags |= IPN_SPLIT;
|
|
*dnetm++ = '\0';
|
|
}
|
|
if (hostnum((u_32_t *)&ipn.in_inip, *cpp, linenum) == -1)
|
|
return NULL;
|
|
} else {
|
|
if (hostnum((u_32_t *)&ipn.in_outip, *cpp, linenum) == -1)
|
|
return NULL;
|
|
}
|
|
cpp++;
|
|
|
|
if (ipn.in_redir & NAT_MAPBLK) {
|
|
if (*cpp && strcasecmp(*cpp, "ports")) {
|
|
fprintf(stderr,
|
|
"%d: expected \"ports\" - got \"%s\"\n",
|
|
linenum, *cpp);
|
|
return NULL;
|
|
}
|
|
cpp++;
|
|
if (*cpp) {
|
|
ipn.in_pmin = atoi(*cpp);
|
|
cpp++;
|
|
} else
|
|
ipn.in_pmin = 0;
|
|
} else if ((ipn.in_redir & NAT_BIMAP) == NAT_REDIRECT) {
|
|
if (strrchr(*cpp, '/') != NULL) {
|
|
fprintf(stderr, "%d: No netmask supported in %s\n",
|
|
linenum, "destination host for redirect");
|
|
return NULL;
|
|
}
|
|
/* If it's a in_redir, expect target port */
|
|
|
|
if (strcasecmp(*cpp, "port")) {
|
|
fprintf(stderr, "%d: missing fields - 2nd port (%s)\n",
|
|
linenum, *cpp);
|
|
return NULL;
|
|
}
|
|
cpp++;
|
|
if (!*cpp) {
|
|
fprintf(stderr,
|
|
"%d: missing fields (destination port)\n",
|
|
linenum);
|
|
return NULL;
|
|
}
|
|
if (!portnum(*cpp, &ipn.in_pnext, linenum))
|
|
return NULL;
|
|
ipn.in_pnext = htons(ipn.in_pnext);
|
|
cpp++;
|
|
}
|
|
if (dnetm && *dnetm == '/')
|
|
*dnetm++ = '\0';
|
|
|
|
if (ipn.in_redir & (NAT_MAP|NAT_MAPBLK)) {
|
|
if (ipn.in_flags & IPN_IPRANGE) {
|
|
if (hostnum((u_32_t *)&ipn.in_outmsk, dnetm,
|
|
linenum) == -1)
|
|
return NULL;
|
|
} else if (genmask(dnetm, (u_32_t *)&ipn.in_outmsk))
|
|
return NULL;
|
|
} else {
|
|
if (ipn.in_flags & IPN_SPLIT) {
|
|
if (hostnum((u_32_t *)&ipn.in_inmsk, dnetm,
|
|
linenum) == -1)
|
|
return NULL;
|
|
} else if (genmask("255.255.255.255", (u_32_t *)&ipn.in_inmsk))
|
|
return NULL;
|
|
if (!*cpp) {
|
|
ipn.in_flags |= IPN_TCP; /* XXX- TCP only by default */
|
|
proto = "tcp";
|
|
} else {
|
|
if (!strcasecmp(*cpp, "tcp"))
|
|
ipn.in_flags |= IPN_TCP;
|
|
else if (!strcasecmp(*cpp, "udp"))
|
|
ipn.in_flags |= IPN_UDP;
|
|
else if (!strcasecmp(*cpp, "tcp/udp"))
|
|
ipn.in_flags |= IPN_TCPUDP;
|
|
else if (!strcasecmp(*cpp, "tcpudp"))
|
|
ipn.in_flags |= IPN_TCPUDP;
|
|
else if (!strcasecmp(*cpp, "ip"))
|
|
ipn.in_flags |= IPN_ANY;
|
|
else {
|
|
ipn.in_flags |= IPN_ANY;
|
|
if ((pr = getprotobyname(*cpp)))
|
|
ipn.in_p = pr->p_proto;
|
|
else
|
|
ipn.in_p = atoi(*cpp);
|
|
}
|
|
proto = *cpp;
|
|
cpp++;
|
|
|
|
if (*cpp && !strcasecmp(*cpp, "round-robin")) {
|
|
cpp++;
|
|
ipn.in_flags |= IPN_ROUNDR;
|
|
}
|
|
|
|
if (*cpp) {
|
|
fprintf(stderr,
|
|
"%d: extra junk at the end of rdr: %s\n",
|
|
linenum, *cpp);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!(ipn.in_flags & IPN_SPLIT))
|
|
ipn.in_inip &= ipn.in_inmsk;
|
|
if ((ipn.in_flags & IPN_IPRANGE) == 0)
|
|
ipn.in_outip &= ipn.in_outmsk;
|
|
ipn.in_srcip &= ipn.in_srcmsk;
|
|
|
|
if ((ipn.in_redir & NAT_MAPBLK) != 0)
|
|
nat_setgroupmap(&ipn);
|
|
|
|
if (!*cpp)
|
|
return &ipn;
|
|
|
|
if (ipn.in_redir == NAT_BIMAP) {
|
|
fprintf(stderr,
|
|
"%d: extra words at the end of bimap line: %s\n",
|
|
linenum, *cpp);
|
|
return NULL;
|
|
}
|
|
|
|
if (!strcasecmp(*cpp, "proxy")) {
|
|
cpp++;
|
|
if (!*cpp) {
|
|
fprintf(stderr,
|
|
"%d: missing parameter for \"proxy\"\n",
|
|
linenum);
|
|
return NULL;
|
|
}
|
|
dport = NULL;
|
|
|
|
if (!strcasecmp(*cpp, "port")) {
|
|
cpp++;
|
|
if (!*cpp) {
|
|
fprintf(stderr,
|
|
"%d: missing parameter for \"port\"\n",
|
|
linenum);
|
|
return NULL;
|
|
}
|
|
|
|
dport = *cpp;
|
|
cpp++;
|
|
|
|
if (!*cpp) {
|
|
fprintf(stderr,
|
|
"%d: missing parameter for \"proxy\"\n",
|
|
linenum);
|
|
return NULL;
|
|
}
|
|
} else {
|
|
fprintf(stderr,
|
|
"%d: missing keyword \"port\"\n", linenum);
|
|
return NULL;
|
|
}
|
|
|
|
if ((proto = index(*cpp, '/'))) {
|
|
*proto++ = '\0';
|
|
if ((pr = getprotobyname(proto)))
|
|
ipn.in_p = pr->p_proto;
|
|
else
|
|
ipn.in_p = atoi(proto);
|
|
} else
|
|
ipn.in_p = 0;
|
|
|
|
if (dport && !portnum(dport, &ipn.in_dport, linenum))
|
|
return NULL;
|
|
ipn.in_dport = htons(ipn.in_dport);
|
|
|
|
(void) strncpy(ipn.in_plabel, *cpp, sizeof(ipn.in_plabel));
|
|
cpp++;
|
|
|
|
if (*cpp) {
|
|
fprintf(stderr,
|
|
"%d: too many parameters for \"proxy\"\n",
|
|
linenum);
|
|
return NULL;
|
|
}
|
|
return &ipn;
|
|
}
|
|
|
|
if (strcasecmp(*cpp, "portmap")) {
|
|
fprintf(stderr,
|
|
"%d: expected \"portmap\" - got \"%s\"\n", linenum,
|
|
*cpp);
|
|
return NULL;
|
|
}
|
|
cpp++;
|
|
if (!*cpp) {
|
|
fprintf(stderr, "%d: missing expression following portmap\n",
|
|
linenum);
|
|
return NULL;
|
|
}
|
|
|
|
if (!strcasecmp(*cpp, "tcp"))
|
|
ipn.in_flags |= IPN_TCP;
|
|
else if (!strcasecmp(*cpp, "udp"))
|
|
ipn.in_flags |= IPN_UDP;
|
|
else if (!strcasecmp(*cpp, "tcpudp"))
|
|
ipn.in_flags |= IPN_TCPUDP;
|
|
else if (!strcasecmp(*cpp, "tcp/udp"))
|
|
ipn.in_flags |= IPN_TCPUDP;
|
|
else {
|
|
fprintf(stderr,
|
|
"%d: expected protocol name - got \"%s\"\n",
|
|
linenum, *cpp);
|
|
return NULL;
|
|
}
|
|
proto = *cpp;
|
|
cpp++;
|
|
|
|
if (!*cpp) {
|
|
fprintf(stderr, "%d: no port range found\n", linenum);
|
|
return NULL;
|
|
}
|
|
|
|
if (!strcasecmp(*cpp, "auto")) {
|
|
ipn.in_flags |= IPN_AUTOPORTMAP;
|
|
ipn.in_pmin = htons(1024);
|
|
ipn.in_pmax = htons(65535);
|
|
nat_setgroupmap(&ipn);
|
|
return &ipn;
|
|
}
|
|
|
|
if (!(t = strchr(*cpp, ':'))) {
|
|
fprintf(stderr, "%d: no port range in \"%s\"\n",
|
|
linenum, *cpp);
|
|
return NULL;
|
|
}
|
|
*t++ = '\0';
|
|
if (!portnum(*cpp, &ipn.in_pmin, linenum) ||
|
|
!portnum(t, &ipn.in_pmax, linenum))
|
|
return NULL;
|
|
ipn.in_pmin = htons(ipn.in_pmin);
|
|
ipn.in_pmax = htons(ipn.in_pmax);
|
|
return &ipn;
|
|
}
|
|
|
|
|
|
void natparsefile(fd, file, opts)
|
|
int fd;
|
|
char *file;
|
|
int opts;
|
|
{
|
|
char line[512], *s;
|
|
ipnat_t *np;
|
|
FILE *fp;
|
|
int linenum = 0;
|
|
|
|
if (strcmp(file, "-")) {
|
|
if (!(fp = fopen(file, "r"))) {
|
|
fprintf(stderr, "%s: open: %s\n", file,
|
|
STRERROR(errno));
|
|
exit(1);
|
|
}
|
|
} else
|
|
fp = stdin;
|
|
|
|
while (fgets(line, sizeof(line) - 1, fp)) {
|
|
linenum++;
|
|
line[sizeof(line) - 1] = '\0';
|
|
if ((s = strchr(line, '\n')))
|
|
*s = '\0';
|
|
|
|
if (!(np = natparse(line, linenum))) {
|
|
if (*line)
|
|
fprintf(stderr, "%d: syntax error in \"%s\"\n",
|
|
linenum, line);
|
|
} else {
|
|
if ((opts & OPT_VERBOSE) && np)
|
|
printnat(np, opts, NULL);
|
|
if (!(opts & OPT_NODO)) {
|
|
if (!(opts & OPT_REMOVE)) {
|
|
if (ioctl(fd, SIOCADNAT, &np) == -1) {
|
|
fprintf(stderr, "%d:",
|
|
linenum);
|
|
perror("ioctl(SIOCADNAT)");
|
|
}
|
|
} else if (ioctl(fd, SIOCRMNAT, &np) == -1) {
|
|
fprintf(stderr, "%d:", linenum);
|
|
perror("ioctl(SIOCRMNAT)");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (fp != stdin)
|
|
fclose(fp);
|
|
}
|