lib/printfr.c

/*
 * Copyright (C) 2010 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 * $Id$
 */

#include "ipf.h"

static void printaddr(int, int, char *, u_32_t *, u_32_t *);

static void printaddr(v, type, ifname, addr, mask)
int v, type;
char *ifname;
u_32_t *addr, *mask;
{
	char *suffix;

	switch (type)
	{
	case FRI_BROADCAST :
		suffix = "bcast";
		break;

	case FRI_DYNAMIC :
		printf("%s", ifname);
		printmask(mask);
		suffix = NULL;
		break;

	case FRI_NETWORK :
		suffix = "net";
		break;

	case FRI_NETMASKED :
		suffix = "netmasked";
		break;

	case FRI_PEERADDR :
		suffix = "peer";
		break;

	case FRI_LOOKUP :
		suffix = NULL;
		printlookup((i6addr_t *)addr, (i6addr_t *)mask);
		break;

	case FRI_NORMAL :
		printhostmask(v, addr, mask);
		suffix = NULL;
		break;
	default :
		printf("<%d>", type);
		printmask(mask);
		suffix = NULL;
		break;
	}

	if (suffix != NULL) {
		printf("%s/%s", ifname, suffix);
	}
}


void printlookup(addr, mask)
i6addr_t *addr, *mask;
{
	switch (addr->iplookuptype)
	{
	case IPLT_POOL :
		printf("pool/");
		break;
	case IPLT_HASH :
		printf("hash/");
		break;
	default :
		printf("lookup(%x)=", addr->iplookuptype);
		break;
	}

	printf("%u", addr->iplookupnum);
	if (mask->iplookupptr == NULL)
		printf("(!)");
}


/*
 * print the filter structure in a useful way
 */
void	printfr(fp, iocfunc)
struct	frentry	*fp;
ioctlfunc_t	iocfunc;
{
	struct protoent	*p;
	u_short	sec[2];
	u_32_t type;
	u_char *t;
	char *s;
	int pr;

	pr = -2;
	type = fp->fr_type & ~FR_T_BUILTIN;

	if ((fp->fr_type & FR_T_BUILTIN) != 0)
		printf("# Builtin: ");

	if (fp->fr_collect != 0)
		printf("%u ", fp->fr_collect);

	if (fp->fr_type == FR_T_CALLFUNC) {
		;
	} else if (fp->fr_func != NULL) {
		printf("call");
		if ((fp->fr_flags & FR_CALLNOW) != 0)
			printf(" now");
		s = kvatoname(fp->fr_func, iocfunc);
		printf(" %s/%u", s ? s : "?", fp->fr_arg);
	} else if (FR_ISPASS(fp->fr_flags))
		printf("pass");
	else if (FR_ISBLOCK(fp->fr_flags)) {
		printf("block");
	} else if ((fp->fr_flags & FR_LOGMASK) == FR_LOG) {
		printlog(fp);
	} else if (FR_ISACCOUNT(fp->fr_flags))
		printf("count");
	else if (FR_ISAUTH(fp->fr_flags))
		printf("auth");
	else if (FR_ISPREAUTH(fp->fr_flags))
		printf("preauth");
	else if (FR_ISNOMATCH(fp->fr_flags))
		printf("nomatch");
	else if (FR_ISSKIP(fp->fr_flags))
		printf("skip %u", fp->fr_arg);
	else {
		printf("%x", fp->fr_flags);
	}
	if (fp->fr_flags & FR_RETICMP) {
		if ((fp->fr_flags & FR_RETMASK) == FR_FAKEICMP)
			printf(" return-icmp-as-dest");
		else if ((fp->fr_flags & FR_RETMASK) == FR_RETICMP)
			printf(" return-icmp");
		if (fp->fr_icode) {
			if (fp->fr_icode <= MAX_ICMPCODE)
				printf("(%s)",
					icmpcodes[(int)fp->fr_icode]);
			else
				printf("(%d)", fp->fr_icode);
		}
	} else if ((fp->fr_flags & FR_RETMASK) == FR_RETRST)
		printf(" return-rst");

	if (fp->fr_flags & FR_OUTQUE)
		printf(" out ");
	else
		printf(" in ");

	if (((fp->fr_flags & FR_LOGB) == FR_LOGB) ||
	    ((fp->fr_flags & FR_LOGP) == FR_LOGP)) {
		printlog(fp);
		putchar(' ');
	}

	if (fp->fr_flags & FR_QUICK)
		printf("quick ");

	if (*fp->fr_ifname) {
		printifname("on ", fp->fr_ifname, fp->fr_ifa);
		if (*fp->fr_ifnames[1] && strcmp(fp->fr_ifnames[1], "*"))
			printifname(",", fp->fr_ifnames[1], fp->fr_ifas[1]);
		putchar(' ');
	}

	if (*fp->fr_dif.fd_ifname && (fp->fr_flags & FR_DUP))
		print_toif("dup-to", &fp->fr_dif);
	if (*fp->fr_tif.fd_ifname)
		print_toif("to", &fp->fr_tif);
	if (*fp->fr_rif.fd_ifname)
		print_toif("reply-to", &fp->fr_rif);
	if (fp->fr_flags & FR_FASTROUTE)
		printf("fastroute ");

	if ((*fp->fr_ifnames[2] && strcmp(fp->fr_ifnames[2], "*")) ||
	    (*fp->fr_ifnames[3] && strcmp(fp->fr_ifnames[3], "*"))) {
		if (fp->fr_flags & FR_OUTQUE)
			printf("in-via ");
		else
			printf("out-via ");

		if (*fp->fr_ifnames[2]) {
			printifname("", fp->fr_ifnames[2],
				    fp->fr_ifas[2]);
			if (*fp->fr_ifnames[3]) {
				printifname(",", fp->fr_ifnames[3],
					    fp->fr_ifas[3]);
			}
			putchar(' ');
		}
	}

	if (type == FR_T_IPF) {
		if (fp->fr_mip.fi_tos)
			printf("tos %#x ", fp->fr_tos);
		if (fp->fr_mip.fi_ttl)
			printf("ttl %d ", fp->fr_ttl);
		if (fp->fr_flx & FI_TCPUDP) {
			printf("proto tcp/udp ");
			pr = -1;
		} else if (fp->fr_mip.fi_p) {
			pr = fp->fr_ip.fi_p;
			p = getprotobynumber(pr);
			printf("proto ");
			printproto(p, pr, NULL);
			putchar(' ');
		}
	}

	if (type == FR_T_NONE) {
		printf("all");
	} else if (type == FR_T_IPF) {
		printf("from %s", fp->fr_flags & FR_NOTSRCIP ? "!" : "");
		printaddr(fp->fr_v, fp->fr_satype, fp->fr_ifname,
			  &fp->fr_src.s_addr, &fp->fr_smsk.s_addr);
		if (fp->fr_scmp)
			printportcmp(pr, &fp->fr_tuc.ftu_src);

		printf(" to %s", fp->fr_flags & FR_NOTDSTIP ? "!" : "");
		printaddr(fp->fr_v, fp->fr_datype, fp->fr_ifname,
			  &fp->fr_dst.s_addr, &fp->fr_dmsk.s_addr);
		if (fp->fr_dcmp)
			printportcmp(pr, &fp->fr_tuc.ftu_dst);

		if (fp->fr_proto == IPPROTO_ICMP && fp->fr_icmpm) {
			int	type = fp->fr_icmp, code;

			type = ntohs(fp->fr_icmp);
			code = type & 0xff;
			type /= 256;
			if (type < (sizeof(icmptypes) / sizeof(char *) - 1) &&
			    icmptypes[type])
				printf(" icmp-type %s", icmptypes[type]);
			else
				printf(" icmp-type %d", type);
			if (ntohs(fp->fr_icmpm) & 0xff)
				printf(" code %d", code);
		}
		if ((fp->fr_proto == IPPROTO_TCP) &&
		    (fp->fr_tcpf || fp->fr_tcpfm)) {
			printf(" flags ");
			if (fp->fr_tcpf & ~TCPF_ALL)
				printf("0x%x", fp->fr_tcpf);
			else
				for (s = flagset, t = flags; *s; s++, t++)
					if (fp->fr_tcpf & *t)
						(void)putchar(*s);
			if (fp->fr_tcpfm) {
				(void)putchar('/');
				if (fp->fr_tcpfm & ~TCPF_ALL)
					printf("0x%x", fp->fr_tcpfm);
				else
					for (s = flagset, t = flags; *s;
					     s++, t++)
						if (fp->fr_tcpfm & *t)
							(void)putchar(*s);
			}
		}
	} else if (type == FR_T_BPFOPC) {
		fakebpf_t *fb;
		int i;

		printf("bpf-v%d { \"", fp->fr_v);
		i = fp->fr_dsize / sizeof(*fb);

		for (fb = fp->fr_data, s = ""; i; i--, fb++, s = " ")
			printf("%s%#x %#x %#x %#x", s, fb->fb_c, fb->fb_t,
			       fb->fb_f, fb->fb_k);

		printf("\" }");
	} else if (type == FR_T_COMPIPF) {
		;
	} else if (type == FR_T_CALLFUNC) {
		printf("call function at %p", fp->fr_data);
	} else {
		printf("[unknown filter type %#x]", fp->fr_type);
	}

	if ((type == FR_T_IPF) &&
	    ((fp->fr_flx & FI_WITH) || (fp->fr_mflx & FI_WITH) ||
	     fp->fr_optbits || fp->fr_optmask ||
	     fp->fr_secbits || fp->fr_secmask)) {
		char *comma = " ";

		printf(" with");
		if (fp->fr_optbits || fp->fr_optmask ||
		    fp->fr_secbits || fp->fr_secmask) {
			sec[0] = fp->fr_secmask;
			sec[1] = fp->fr_secbits;
			if (fp->fr_v == 4)
				optprint(sec, fp->fr_optmask, fp->fr_optbits);
#ifdef	USE_INET6
			else
				optprintv6(sec, fp->fr_optmask,
					   fp->fr_optbits);
#endif
		} else if (fp->fr_mflx & FI_OPTIONS) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_OPTIONS))
				printf("not ");
			printf("ipopts");
			comma = ",";
		}
		if (fp->fr_mflx & FI_SHORT) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_SHORT))
				printf("not ");
			printf("short");
			comma = ",";
		}
		if (fp->fr_mflx & FI_FRAG) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_FRAG))
				printf("not ");
			printf("frag");
			comma = ",";
		}
		if (fp->fr_mflx & FI_FRAGBODY) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_FRAGBODY))
				printf("not ");
			printf("frag-body");
			comma = ",";
		}
		if (fp->fr_mflx & FI_NATED) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_NATED))
				printf("not ");
			printf("nat");
			comma = ",";
		}
		if (fp->fr_mflx & FI_LOWTTL) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_LOWTTL))
				printf("not ");
			printf("lowttl");
			comma = ",";
		}
		if (fp->fr_mflx & FI_BAD) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_BAD))
				printf("not ");
			printf("bad");
			comma = ",";
		}
		if (fp->fr_mflx & FI_BADSRC) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_BADSRC))
				printf("not ");
			printf("bad-src");
			comma = ",";
		}
		if (fp->fr_mflx & FI_BADNAT) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_BADNAT))
				printf("not ");
			printf("bad-nat");
			comma = ",";
		}
		if (fp->fr_mflx & FI_OOW) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_OOW))
				printf("not ");
			printf("oow");
			comma = ",";
		}
		if (fp->fr_mflx & FI_MBCAST) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_MBCAST))
				printf("not ");
			printf("mbcast");
			comma = ",";
		}
		if (fp->fr_mflx & FI_BROADCAST) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_BROADCAST))
				printf("not ");
			printf("bcast");
			comma = ",";
		}
		if (fp->fr_mflx & FI_MULTICAST) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_MULTICAST))
				printf("not ");
			printf("mcast");
			comma = ",";
		}
		if (fp->fr_mflx & FI_STATE) {
			fputs(comma, stdout);
			if (!(fp->fr_flx & FI_STATE))
				printf("not ");
			printf("state");
			comma = ",";
		}
	}

	if (fp->fr_flags & FR_KEEPSTATE) {
		printf(" keep state");
		if ((fp->fr_flags & (FR_STSTRICT|FR_NEWISN|FR_NOICMPERR|FR_STATESYNC)) ||
		    (fp->fr_statemax != 0) || (fp->fr_age[0] != 0)) {
			char *comma = "";
			printf(" (");
			if (fp->fr_statemax != 0) {
				printf("limit %u", fp->fr_statemax);
				comma = ",";
			}
			if (fp->fr_flags & FR_STSTRICT) {
				printf("%sstrict", comma);
				comma = ",";
			}
			if (fp->fr_flags & FR_NEWISN) {
				printf("%snewisn", comma);
				comma = ",";
			}
			if (fp->fr_flags & FR_NOICMPERR) {
				printf("%sno-icmp-err", comma);
				comma = ",";
			}
			if (fp->fr_flags & FR_STATESYNC) {
				printf("%ssync", comma);
				comma = ",";
			}
			if (fp->fr_age[0] || fp->fr_age[1])
				printf("%sage %d/%d", comma, fp->fr_age[0],
				       fp->fr_age[1]);
			printf(")");
		}
	}
	if (fp->fr_flags & FR_KEEPFRAG) {
		printf(" keep frags");
		if (fp->fr_flags & (FR_FRSTRICT)) {
			printf(" (");
			if (fp->fr_flags & FR_FRSTRICT)
				printf("strict");
			printf(")");

		}
	}
	if (fp->fr_isc != (struct ipscan *)-1) {
		if (fp->fr_isctag[0])
			printf(" scan %s", fp->fr_isctag);
		else
			printf(" scan *");
	}
	if (*fp->fr_grhead != '\0')
		printf(" head %s", fp->fr_grhead);
	if (*fp->fr_group != '\0')
		printf(" group %s", fp->fr_group);
	if (fp->fr_logtag != FR_NOLOGTAG || *fp->fr_nattag.ipt_tag) {
		char *s = "";

		printf(" set-tag(");
		if (fp->fr_logtag != FR_NOLOGTAG) {
			printf("log=%u", fp->fr_logtag);
			s = ", ";
		}
		if (*fp->fr_nattag.ipt_tag) {
			printf("%snat=%-.*s", s, IPFTAG_LEN,
				fp->fr_nattag.ipt_tag);
		}
		printf(")");
	}

	if (fp->fr_pps)
		printf(" pps %d", fp->fr_pps);

	if ((fp->fr_flags & FR_KEEPSTATE) && (opts & OPT_VERBOSE)) {
		printf(" # count %d", fp->fr_statecnt);
	}
	(void)putchar('\n');
}