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freebsd-src/contrib/ipfilter/printnat.c
Darren Reed 0868380a54 Import IPFilter 3.4.25
2002-03-19 11:45:24 +00:00

463 lines
12 KiB
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/*
* Copyright (C) 1993-2001 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*
* Added redirect stuff and a variety of bug fixes. (mcn@EnGarde.com)
*/
#ifdef __sgi
# include <sys/ptimers.h>
#endif
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#if !defined(__SVR4) && !defined(__svr4__)
#include <strings.h>
#else
#include <sys/byteorder.h>
#endif
#include <sys/time.h>
#include <sys/param.h>
#include <stdlib.h>
#include <unistd.h>
#include <stddef.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#if defined(sun) && (defined(__svr4__) || defined(__SVR4))
# include <sys/ioccom.h>
# include <sys/sysmacros.h>
#endif
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <net/if.h>
#if __FreeBSD_version >= 300000
# include <net/if_var.h>
#endif
#include <netdb.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>
#include <resolv.h>
#include <ctype.h>
#include "netinet/ip_compat.h"
#include "netinet/ip_fil.h"
#include "netinet/ip_nat.h"
#include "netinet/ip_state.h"
#include "netinet/ip_proxy.h"
#include "ipf.h"
#include "kmem.h"
#if defined(sun) && !SOLARIS2
# define STRERROR(x) sys_errlist[x]
extern char *sys_errlist[];
#else
# define STRERROR(x) strerror(x)
#endif
#if !defined(lint)
static const char rcsid[] = "@(#)$Id: printnat.c,v 1.1.2.6 2002/02/22 15:32:56 darrenr Exp $";
#endif
#if SOLARIS
#define bzero(a,b) memset(a,0,b)
#endif
#ifdef USE_INET6
extern int use_inet6;
#endif
extern char thishost[MAXHOSTNAMELEN];
extern int countbits __P((u_32_t));
void printnat __P((ipnat_t *, int));
char *getnattype __P((ipnat_t *));
void printactivenat __P((nat_t *, int));
void printhostmap __P((hostmap_t *, u_int));
char *getsumd __P((u_32_t));
static void printaps __P((ap_session_t *, int));
static void printaps(aps, opts)
ap_session_t *aps;
int opts;
{
ipsec_pxy_t ipsec;
ap_session_t ap;
ftpinfo_t ftp;
aproxy_t apr;
raudio_t ra;
if (kmemcpy((char *)&ap, (long)aps, sizeof(ap)))
return;
if (kmemcpy((char *)&apr, (long)ap.aps_apr, sizeof(apr)))
return;
printf("\tproxy %s/%d use %d flags %x\n", apr.apr_label,
apr.apr_p, apr.apr_ref, apr.apr_flags);
printf("\t\tproto %d flags %#x bytes ", ap.aps_p, ap.aps_flags);
#ifdef USE_QUAD_T
printf("%qu pkts %qu", (unsigned long long)ap.aps_bytes,
(unsigned long long)ap.aps_pkts);
#else
printf("%lu pkts %lu", ap.aps_bytes, ap.aps_pkts);
#endif
printf(" data %s size %d\n", ap.aps_data ? "YES" : "NO", ap.aps_psiz);
if ((ap.aps_p == IPPROTO_TCP) && (opts & OPT_VERBOSE)) {
printf("\t\tstate[%u,%u], sel[%d,%d]\n",
ap.aps_state[0], ap.aps_state[1],
ap.aps_sel[0], ap.aps_sel[1]);
#if (defined(NetBSD) && (NetBSD >= 199905) && (NetBSD < 1991011)) || \
(__FreeBSD_version >= 300000) || defined(OpenBSD)
printf("\t\tseq: off %hd/%hd min %x/%x\n",
ap.aps_seqoff[0], ap.aps_seqoff[1],
ap.aps_seqmin[0], ap.aps_seqmin[1]);
printf("\t\tack: off %hd/%hd min %x/%x\n",
ap.aps_ackoff[0], ap.aps_ackoff[1],
ap.aps_ackmin[0], ap.aps_ackmin[1]);
#else
printf("\t\tseq: off %hd/%hd min %lx/%lx\n",
ap.aps_seqoff[0], ap.aps_seqoff[1],
ap.aps_seqmin[0], ap.aps_seqmin[1]);
printf("\t\tack: off %hd/%hd min %lx/%lx\n",
ap.aps_ackoff[0], ap.aps_ackoff[1],
ap.aps_ackmin[0], ap.aps_ackmin[1]);
#endif
}
if (!strcmp(apr.apr_label, "raudio") && ap.aps_psiz == sizeof(ra)) {
if (kmemcpy((char *)&ra, (long)ap.aps_data, sizeof(ra)))
return;
printf("\tReal Audio Proxy:\n");
printf("\t\tSeen PNA: %d\tVersion: %d\tEOS: %d\n",
ra.rap_seenpna, ra.rap_version, ra.rap_eos);
printf("\t\tMode: %#x\tSBF: %#x\n", ra.rap_mode, ra.rap_sbf);
printf("\t\tPorts:pl %hu, pr %hu, sr %hu\n",
ra.rap_plport, ra.rap_prport, ra.rap_srport);
} else if (!strcmp(apr.apr_label, "ftp") &&
(ap.aps_psiz == sizeof(ftp))) {
if (kmemcpy((char *)&ftp, (long)ap.aps_data, sizeof(ftp)))
return;
printf("\tFTP Proxy:\n");
printf("\t\tpassok: %d\n", ftp.ftp_passok);
ftp.ftp_side[0].ftps_buf[FTP_BUFSZ - 1] = '\0';
ftp.ftp_side[1].ftps_buf[FTP_BUFSZ - 1] = '\0';
printf("\tClient:\n");
printf("\t\tseq %x len %d junk %d cmds %d\n",
ftp.ftp_side[0].ftps_seq, ftp.ftp_side[0].ftps_len,
ftp.ftp_side[0].ftps_junk, ftp.ftp_side[0].ftps_cmds);
printf("\t\tbuf [");
printbuf(ftp.ftp_side[0].ftps_buf, FTP_BUFSZ, 1);
printf("]\n\tServer:\n");
printf("\t\tseq %x len %d junk %d cmds %d\n",
ftp.ftp_side[1].ftps_seq, ftp.ftp_side[1].ftps_len,
ftp.ftp_side[1].ftps_junk, ftp.ftp_side[1].ftps_cmds);
printf("\t\tbuf [");
printbuf(ftp.ftp_side[1].ftps_buf, FTP_BUFSZ, 1);
printf("]\n");
} else if (!strcmp(apr.apr_label, "ipsec") &&
(ap.aps_psiz == sizeof(ipsec))) {
if (kmemcpy((char *)&ipsec, (long)ap.aps_data, sizeof(ipsec)))
return;
printf("\tIPSec Proxy:\n");
printf("\t\tICookie %08x%08x RCookie %08x%08x %s\n",
(u_int)ntohl(ipsec.ipsc_icookie[0]),
(u_int)ntohl(ipsec.ipsc_icookie[1]),
(u_int)ntohl(ipsec.ipsc_rcookie[0]),
(u_int)ntohl(ipsec.ipsc_rcookie[1]),
ipsec.ipsc_rckset ? "(Set)" : "(Not set)");
}
}
/*
* Get a nat filter type given its kernel address.
*/
char *getnattype(ipnat)
ipnat_t *ipnat;
{
static char unknownbuf[20];
ipnat_t ipnatbuff;
char *which;
if (!ipnat || (ipnat && kmemcpy((char *)&ipnatbuff, (long)ipnat,
sizeof(ipnatbuff))))
return "???";
switch (ipnatbuff.in_redir)
{
case NAT_MAP :
which = "MAP";
break;
case NAT_MAPBLK :
which = "MAP-BLOCK";
break;
case NAT_REDIRECT :
which = "RDR";
break;
case NAT_BIMAP :
which = "BIMAP";
break;
default :
sprintf(unknownbuf, "unknown(%04x)",
ipnatbuff.in_redir & 0xffffffff);
which = unknownbuf;
break;
}
return which;
}
void printactivenat(nat, opts)
nat_t *nat;
int opts;
{
u_int hv1, hv2;
printf("%s %-15s", getnattype(nat->nat_ptr), inet_ntoa(nat->nat_inip));
if ((nat->nat_flags & IPN_TCPUDP) != 0)
printf(" %-5hu", ntohs(nat->nat_inport));
printf(" <- -> %-15s",inet_ntoa(nat->nat_outip));
if ((nat->nat_flags & IPN_TCPUDP) != 0)
printf(" %-5hu", ntohs(nat->nat_outport));
printf(" [%s", inet_ntoa(nat->nat_oip));
if ((nat->nat_flags & IPN_TCPUDP) != 0)
printf(" %hu", ntohs(nat->nat_oport));
printf("]");
if (opts & OPT_VERBOSE) {
printf("\n\tage %lu use %hu sumd %s/",
nat->nat_age, nat->nat_use, getsumd(nat->nat_sumd[0]));
hv1 = NAT_HASH_FN(nat->nat_inip.s_addr, nat->nat_inport,
0xffffffff),
hv1 = NAT_HASH_FN(nat->nat_oip.s_addr, hv1 + nat->nat_oport,
NAT_TABLE_SZ),
hv2 = NAT_HASH_FN(nat->nat_outip.s_addr, nat->nat_outport,
0xffffffff),
hv2 = NAT_HASH_FN(nat->nat_oip.s_addr, hv2 + nat->nat_oport,
NAT_TABLE_SZ),
printf("%s pr %u bkt %d/%d flags %x\n",
getsumd(nat->nat_sumd[1]), nat->nat_p,
hv1, hv2, nat->nat_flags);
printf("\tifp %s ", getifname(nat->nat_ifp));
#ifdef USE_QUAD_T
printf("bytes %qu pkts %qu",
(unsigned long long)nat->nat_bytes,
(unsigned long long)nat->nat_pkts);
#else
printf("bytes %lu pkts %lu", nat->nat_bytes, nat->nat_pkts);
#endif
#if SOLARIS
printf(" %lx", nat->nat_ipsumd);
#endif
}
putchar('\n');
if (nat->nat_aps)
printaps(nat->nat_aps, opts);
}
void printhostmap(hmp, hv)
hostmap_t *hmp;
u_int hv;
{
printf("%s -> ", inet_ntoa(hmp->hm_realip));
printf("%s ", inet_ntoa(hmp->hm_mapip));
printf("(use = %d hv = %u)\n", hmp->hm_ref, hv);
}
char *getsumd(sum)
u_32_t sum;
{
static char sumdbuf[17];
if (sum & NAT_HW_CKSUM)
sprintf(sumdbuf, "hw(%#0x)", sum & 0xffff);
else
sprintf(sumdbuf, "%#0x", sum);
return sumdbuf;
}
/*
* Print out a NAT rule
*/
void printnat(np, opts)
ipnat_t *np;
int opts;
{
struct protoent *pr;
struct servent *sv;
int bits;
switch (np->in_redir)
{
case NAT_REDIRECT :
printf("rdr");
break;
case NAT_MAP :
printf("map");
break;
case NAT_MAPBLK :
printf("map-block");
break;
case NAT_BIMAP :
printf("bimap");
break;
default :
fprintf(stderr, "unknown value for in_redir: %#x\n",
np->in_redir);
break;
}
printf(" %s ", np->in_ifname);
if (np->in_flags & IPN_FILTER) {
if (np->in_flags & IPN_NOTSRC)
printf("! ");
printf("from ");
if (np->in_redir == NAT_REDIRECT) {
printhostmask(4, (u_32_t *)&np->in_srcip,
(u_32_t *)&np->in_srcmsk);
} else {
printhostmask(4, (u_32_t *)&np->in_inip,
(u_32_t *)&np->in_inmsk);
}
if (np->in_scmp)
printportcmp(np->in_p, &np->in_tuc.ftu_src);
if (np->in_flags & IPN_NOTDST)
printf(" !");
printf(" to ");
if (np->in_redir == NAT_REDIRECT) {
printhostmask(4, (u_32_t *)&np->in_outip,
(u_32_t *)&np->in_outmsk);
} else {
printhostmask(4, (u_32_t *)&np->in_srcip,
(u_32_t *)&np->in_srcmsk);
}
if (np->in_dcmp)
printportcmp(np->in_p, &np->in_tuc.ftu_dst);
}
if (np->in_redir == NAT_REDIRECT) {
if (!(np->in_flags & IPN_FILTER)) {
printf("%s", inet_ntoa(np->in_out[0]));
bits = countbits(np->in_out[1].s_addr);
if (bits != -1)
printf("/%d ", bits);
else
printf("/%s ", inet_ntoa(np->in_out[1]));
printf("port %d", ntohs(np->in_pmin));
if (np->in_pmax != np->in_pmin)
printf("- %d", ntohs(np->in_pmax));
}
printf(" -> %s", inet_ntoa(np->in_in[0]));
if (np->in_flags & IPN_SPLIT)
printf(",%s", inet_ntoa(np->in_in[1]));
printf(" port %d", ntohs(np->in_pnext));
if ((np->in_flags & IPN_TCPUDP) == IPN_TCPUDP)
printf(" tcp/udp");
else if ((np->in_flags & IPN_TCP) == IPN_TCP)
printf(" tcp");
else if ((np->in_flags & IPN_UDP) == IPN_UDP)
printf(" udp");
else if (np->in_p == 0)
printf(" ip");
else if (np->in_p != 0)
printf(" %d", np->in_p);
if (np->in_flags & IPN_ROUNDR)
printf(" round-robin");
if (np->in_flags & IPN_FRAG)
printf(" frag");
printf("\n");
if (opts & OPT_DEBUG)
printf("\tspc %lu flg %#x max %u use %d\n",
np->in_space, np->in_flags,
np->in_pmax, np->in_use);
} else {
np->in_nextip.s_addr = htonl(np->in_nextip.s_addr);
if (!(np->in_flags & IPN_FILTER)) {
printf("%s/", inet_ntoa(np->in_in[0]));
bits = countbits(np->in_in[1].s_addr);
if (bits != -1)
printf("%d ", bits);
else
printf("%s", inet_ntoa(np->in_in[1]));
}
printf(" -> ");
if (np->in_flags & IPN_IPRANGE) {
printf("range %s-", inet_ntoa(np->in_out[0]));
printf("%s", inet_ntoa(np->in_out[1]));
} else {
printf("%s/", inet_ntoa(np->in_out[0]));
bits = countbits(np->in_out[1].s_addr);
if (bits != -1)
printf("%d ", bits);
else
printf("%s", inet_ntoa(np->in_out[1]));
}
if (*np->in_plabel) {
pr = getprotobynumber(np->in_p);
printf(" proxy port");
if (np->in_dport != 0) {
if (pr != NULL)
sv = getservbyport(np->in_dport,
pr->p_name);
else
sv = getservbyport(np->in_dport, NULL);
if (sv != NULL)
printf(" %s", sv->s_name);
else
printf(" %hu", ntohs(np->in_dport));
}
printf(" %.*s/", (int)sizeof(np->in_plabel),
np->in_plabel);
if (pr != NULL)
fputs(pr->p_name, stdout);
else
printf("%d", np->in_p);
} else if (np->in_redir == NAT_MAPBLK) {
printf(" ports %d", np->in_pmin);
if (opts & OPT_VERBOSE)
printf("\n\tip modulous %d", np->in_pmax);
} else if (np->in_pmin || np->in_pmax) {
printf(" portmap");
if (np->in_flags & IPN_AUTOPORTMAP) {
printf(" auto");
if (opts & OPT_DEBUG)
printf(" [%d:%d %d %d]",
ntohs(np->in_pmin),
ntohs(np->in_pmax),
np->in_ippip, np->in_ppip);
} else {
if ((np->in_flags & IPN_TCPUDP) == IPN_TCPUDP)
printf(" tcp/udp");
else if (np->in_flags & IPN_TCP)
printf(" tcp");
else if (np->in_flags & IPN_UDP)
printf(" udp");
printf(" %d:%d", ntohs(np->in_pmin),
ntohs(np->in_pmax));
}
}
if (np->in_flags & IPN_FRAG)
printf(" frag");
printf("\n");
if (opts & OPT_DEBUG) {
printf("\tspace %lu nextip %s pnext %d", np->in_space,
inet_ntoa(np->in_nextip), np->in_pnext);
printf(" flags %x use %u\n",
np->in_flags, np->in_use);
}
}
}
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