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freebsd-dev/sbin/ipf/libipf/printstate.c
Cy Schubert 93c1048a13 ipfilter: Reliably print the interface name 
When printing the interface name from the ipstate_t struct the interface
name in is_ifp may not always be avaiable when reading it from kmem
(tested on FreeBSD and NetBSD). However the is_ifname (the interface
name character string) is almost always available -- it is not available
when the source of the packet is a process running on the firewall
itself. Rather than print both interface name strings, print only the
one.

MFC after:	1 week
2022-03-03 06:43:12 -08:00

218 lines
5.6 KiB
C
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/* $FreeBSD$ */
/*
* Copyright (C) 2012 by Darren Reed.
*
* See the IPFILTER.LICENCE file for details on licencing.
*/
#include "ipf.h"
#include "kmem.h"
ipstate_t *
printstate(ipstate_t *sp, int opts, u_long now)
{
struct protoent *pr;
synclist_t ipsync;
if ((opts & OPT_NORESOLVE) == 0)
pr = getprotobynumber(sp->is_p);
else
pr = NULL;
PRINTF("%d:", sp->is_v);
if (pr != NULL)
PRINTF("%s", pr->p_name);
else
PRINTF("%d", sp->is_p);
PRINTF(" src:%s", hostname(sp->is_family, &sp->is_src.in4));
if (sp->is_p == IPPROTO_UDP || sp->is_p == IPPROTO_TCP) {
if (sp->is_flags & IS_WSPORT)
PRINTF(",*");
else
PRINTF(",%d", ntohs(sp->is_sport));
}
PRINTF(" dst:%s", hostname(sp->is_family, &sp->is_dst.in4));
if (sp->is_p == IPPROTO_UDP || sp->is_p == IPPROTO_TCP) {
if (sp->is_flags & IS_WDPORT)
PRINTF(",*");
else
PRINTF(",%d", ntohs(sp->is_dport));
}
if (sp->is_p == IPPROTO_TCP) {
PRINTF(" state:%d/%d", sp->is_state[0], sp->is_state[1]);
}
PRINTF(" %ld", sp->is_die - now);
if (sp->is_phnext == NULL)
PRINTF(" ORPHAN");
if (sp->is_flags & IS_CLONE)
PRINTF(" CLONE");
putchar('\n');
if (sp->is_p == IPPROTO_TCP) {
PRINTF("\t%x:%x %hu<<%d:%hu<<%d\n",
sp->is_send, sp->is_dend,
sp->is_maxswin, sp->is_swinscale,
sp->is_maxdwin, sp->is_dwinscale);
if ((opts & OPT_VERBOSE) != 0) {
PRINTF("\tcmsk %04x smsk %04x isc %p s0 %08x/%08x\n",
sp->is_smsk[0], sp->is_smsk[1], sp->is_isc,
sp->is_s0[0], sp->is_s0[1]);
PRINTF("\tFWD: ISN inc %x sumd %x\n",
sp->is_isninc[0], sp->is_sumd[0]);
PRINTF("\tREV: ISN inc %x sumd %x\n",
sp->is_isninc[1], sp->is_sumd[1]);
#ifdef IPFILTER_SCAN
PRINTF("\tsbuf[0] [");
printsbuf(sp->is_sbuf[0]);
PRINTF("] sbuf[1] [");
printsbuf(sp->is_sbuf[1]);
PRINTF("]\n");
#endif
}
} else if (sp->is_p == IPPROTO_GRE) {
PRINTF("\tcall %hx/%hx\n", ntohs(sp->is_gre.gs_call[0]),
ntohs(sp->is_gre.gs_call[1]));
} else if (sp->is_p == IPPROTO_ICMP
#ifdef USE_INET6
|| sp->is_p == IPPROTO_ICMPV6
#endif
) {
PRINTF("\tid %hu seq %hu type %d\n", sp->is_icmp.ici_id,
sp->is_icmp.ici_seq, sp->is_icmp.ici_type);
}
#ifdef USE_QUAD_T
PRINTF("\tFWD: IN pkts %"PRIu64" bytes %"PRIu64" OUT pkts %"PRIu64" bytes %"PRIu64"\n\tREV: IN pkts %"PRIu64" bytes %"PRIu64" OUT pkts %"PRIu64" bytes %"PRIu64"\n",
sp->is_pkts[0], sp->is_bytes[0],
sp->is_pkts[1], sp->is_bytes[1],
sp->is_pkts[2], sp->is_bytes[2],
sp->is_pkts[3], sp->is_bytes[3]);
#else
PRINTF("\tFWD: IN pkts %lu bytes %lu OUT pkts %lu bytes %lu\n\tREV: IN pkts %lu bytes %lu OUT pkts %lu bytes %lu\n",
sp->is_pkts[0], sp->is_bytes[0],
sp->is_pkts[1], sp->is_bytes[1],
sp->is_pkts[2], sp->is_bytes[2],
sp->is_pkts[3], sp->is_bytes[3]);
#endif
PRINTF("\ttag %u pass %#x = ", sp->is_tag, sp->is_pass);
/*
* Print out bits set in the result code for the state being
* kept as they would for a rule.
*/
if (FR_ISPASS(sp->is_pass)) {
PRINTF("pass");
} else if (FR_ISBLOCK(sp->is_pass)) {
PRINTF("block");
switch (sp->is_pass & FR_RETMASK)
{
case FR_RETICMP :
PRINTF(" return-icmp");
break;
case FR_FAKEICMP :
PRINTF(" return-icmp-as-dest");
break;
case FR_RETRST :
PRINTF(" return-rst");
break;
default :
break;
}
} else if ((sp->is_pass & FR_LOGMASK) == FR_LOG) {
PRINTF("log");
if (sp->is_pass & FR_LOGBODY)
PRINTF(" body");
if (sp->is_pass & FR_LOGFIRST)
PRINTF(" first");
} else if (FR_ISACCOUNT(sp->is_pass)) {
PRINTF("count");
} else if (FR_ISPREAUTH(sp->is_pass)) {
PRINTF("preauth");
} else if (FR_ISAUTH(sp->is_pass))
PRINTF("auth");
if (sp->is_pass & FR_OUTQUE)
PRINTF(" out");
else
PRINTF(" in");
if ((sp->is_pass & FR_LOG) != 0) {
PRINTF(" log");
if (sp->is_pass & FR_LOGBODY)
PRINTF(" body");
if (sp->is_pass & FR_LOGFIRST)
PRINTF(" first");
if (sp->is_pass & FR_LOGORBLOCK)
PRINTF(" or-block");
}
if (sp->is_pass & FR_QUICK)
PRINTF(" quick");
if (sp->is_pass & FR_KEEPFRAG)
PRINTF(" keep frags");
/* a given; no? */
if (sp->is_pass & FR_KEEPSTATE) {
PRINTF(" keep state");
if (sp->is_pass & (FR_STATESYNC|FR_STSTRICT|FR_STLOOSE)) {
PRINTF(" (");
if (sp->is_pass & FR_STATESYNC)
PRINTF(" sync");
if (sp->is_pass & FR_STSTRICT)
PRINTF(" strict");
if (sp->is_pass & FR_STLOOSE)
PRINTF(" loose");
PRINTF(" )");
}
}
PRINTF("\n");
if ((opts & OPT_VERBOSE) != 0) {
PRINTF("\tref %d", sp->is_ref);
PRINTF(" pkt_flags & %x(%x) = %x\n",
sp->is_flags & 0xf, sp->is_flags, sp->is_flags >> 4);
PRINTF("\tpkt_options & %x = %x, %x = %x \n", sp->is_optmsk[0],
sp->is_opt[0], sp->is_optmsk[1], sp->is_opt[1]);
PRINTF("\tpkt_security & %x = %x, pkt_auth & %x = %x\n",
sp->is_secmsk, sp->is_sec, sp->is_authmsk,
sp->is_auth);
PRINTF("\tis_flx %#x %#x %#x %#x\n", sp->is_flx[0][0],
sp->is_flx[0][1], sp->is_flx[1][0], sp->is_flx[1][1]);
}
PRINTF("\tinterfaces: in %s", FORMAT_IF(sp->is_ifname[0]));
if (opts & OPT_DEBUG)
PRINTF("/%p", sp->is_ifp[0]);
PRINTF(",%s", FORMAT_IF(sp->is_ifname[1]));
if (opts & OPT_DEBUG)
PRINTF("/%p", sp->is_ifp[1]);
PRINTF(" out %s", FORMAT_IF(sp->is_ifname[2]));
if (opts & OPT_DEBUG)
PRINTF("/%p", sp->is_ifp[2]);
PRINTF(",%s", FORMAT_IF(sp->is_ifname[3]));
if (opts & OPT_DEBUG)
PRINTF("/%p", sp->is_ifp[3]);
PRINTF("\n");
PRINTF("\tSync status: ");
if (sp->is_sync != NULL) {
if (kmemcpy((char *)&ipsync, (u_long)sp->is_sync,
sizeof(ipsync))) {
PRINTF("status could not be retrieved\n");
return (NULL);
}
PRINTF("idx %d num %d v %d pr %d rev %d\n",
ipsync.sl_idx, ipsync.sl_num, ipsync.sl_v,
ipsync.sl_p, ipsync.sl_rev);
} else {
PRINTF("not synchronized\n");
}
return (sp->is_next);
}
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