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-rw-r--r--usr.sbin/ppp/filter.c604
1 files changed, 0 insertions, 604 deletions
diff --git a/usr.sbin/ppp/filter.c b/usr.sbin/ppp/filter.c
deleted file mode 100644
index f59848e..0000000
--- a/usr.sbin/ppp/filter.c
+++ /dev/null
@@ -1,604 +0,0 @@
-/*-
- * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
- * based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
- * Internet Initiative Japan, Inc (IIJ)
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <termios.h>
-
-#include "layer.h"
-#include "defs.h"
-#include "command.h"
-#include "mbuf.h"
-#include "log.h"
-#include "iplist.h"
-#include "timer.h"
-#include "throughput.h"
-#include "lqr.h"
-#include "hdlc.h"
-#include "fsm.h"
-#include "lcp.h"
-#include "ccp.h"
-#include "link.h"
-#include "slcompress.h"
-#include "ncpaddr.h"
-#include "ipcp.h"
-#include "filter.h"
-#include "descriptor.h"
-#include "prompt.h"
-#include "mp.h"
-#ifndef NORADIUS
-#include "radius.h"
-#endif
-#include "ipv6cp.h"
-#include "ncp.h"
-#include "bundle.h"
-
-static unsigned filter_Nam2Op(const char *);
-
-static int
-ParsePort(const char *service, const char *proto)
-{
- struct servent *servent;
- char *cp;
- int port;
-
- servent = getservbyname(service, proto);
- if (servent != 0)
- return ntohs(servent->s_port);
-
- port = strtol(service, &cp, 0);
- if (cp == service) {
- log_Printf(LogWARN, "ParsePort: %s is not a port name or number.\n",
- service);
- return 0;
- }
- return port;
-}
-
-/*
- * ICMP Syntax: src eq icmp_message_type
- */
-static int
-ParseIcmp(int argc, char const *const *argv, struct filterent *tgt)
-{
- int type;
- char *cp;
-
- switch (argc) {
- case 0:
- /* permit/deny all ICMP types */
- tgt->f_srcop = tgt->f_dstop = OP_NONE;
- break;
-
- case 3:
- if (!strcmp(*argv, "src") && !strcmp(argv[1], "eq")) {
- type = strtol(argv[2], &cp, 0);
- if (cp == argv[2]) {
- log_Printf(LogWARN, "ParseIcmp: type is expected.\n");
- return 0;
- }
- tgt->f_srcop = OP_EQ;
- tgt->f_srcport = type;
- tgt->f_dstop = OP_NONE;
- }
- break;
-
- default:
- log_Printf(LogWARN, "ParseIcmp: bad icmp syntax.\n");
- return 0;
- }
- return 1;
-}
-
-/*
- * UDP Syntax: [src op port] [dst op port]
- */
-static int
-ParseUdpOrTcp(int argc, char const *const *argv, const struct protoent *pe,
- struct filterent *tgt)
-{
- tgt->f_srcop = tgt->f_dstop = OP_NONE;
- tgt->f_estab = tgt->f_syn = tgt->f_finrst = 0;
-
- if (argc >= 3 && !strcmp(*argv, "src")) {
- tgt->f_srcop = filter_Nam2Op(argv[1]);
- if (tgt->f_srcop == OP_NONE) {
- log_Printf(LogWARN, "ParseUdpOrTcp: bad operator\n");
- return 0;
- }
- if (pe == NULL)
- return 0;
- tgt->f_srcport = ParsePort(argv[2], pe->p_name);
- if (tgt->f_srcport == 0)
- return 0;
- argc -= 3;
- argv += 3;
- }
-
- if (argc >= 3 && !strcmp(argv[0], "dst")) {
- tgt->f_dstop = filter_Nam2Op(argv[1]);
- if (tgt->f_dstop == OP_NONE) {
- log_Printf(LogWARN, "ParseUdpOrTcp: bad operator\n");
- return 0;
- }
- if (pe == NULL)
- return 0;
- tgt->f_dstport = ParsePort(argv[2], pe->p_name);
- if (tgt->f_dstport == 0)
- return 0;
- argc -= 3;
- argv += 3;
- }
-
- if (pe && pe->p_proto == IPPROTO_TCP) {
- for (; argc > 0; argc--, argv++)
- if (!strcmp(*argv, "estab"))
- tgt->f_estab = 1;
- else if (!strcmp(*argv, "syn"))
- tgt->f_syn = 1;
- else if (!strcmp(*argv, "finrst"))
- tgt->f_finrst = 1;
- else
- break;
- }
-
- if (argc > 0) {
- log_Printf(LogWARN, "ParseUdpOrTcp: bad src/dst port syntax: %s\n", *argv);
- return 0;
- }
-
- return 1;
-}
-
-static int
-ParseGeneric(int argc, struct filterent *tgt)
-{
- /*
- * Filter currently is a catch-all. Requests are either permitted or
- * dropped.
- */
- if (argc != 0) {
- log_Printf(LogWARN, "ParseGeneric: Too many parameters\n");
- return 0;
- } else
- tgt->f_srcop = tgt->f_dstop = OP_NONE;
-
- return 1;
-}
-
-static unsigned
-addrtype(const char *addr)
-{
- if (!strncasecmp(addr, "MYADDR", 6) && (addr[6] == '\0' || addr[6] == '/'))
- return T_MYADDR;
- if (!strncasecmp(addr, "MYADDR6", 7) && (addr[7] == '\0' || addr[7] == '/'))
- return T_MYADDR6;
- if (!strncasecmp(addr, "HISADDR", 7) && (addr[7] == '\0' || addr[7] == '/'))
- return T_HISADDR;
- if (!strncasecmp(addr, "HISADDR6", 8) && (addr[8] == '\0' || addr[8] == '/'))
- return T_HISADDR6;
- if (!strncasecmp(addr, "DNS0", 4) && (addr[4] == '\0' || addr[4] == '/'))
- return T_DNS0;
- if (!strncasecmp(addr, "DNS1", 4) && (addr[4] == '\0' || addr[4] == '/'))
- return T_DNS1;
-
- return T_ADDR;
-}
-
-static const char *
-addrstr(struct ncprange *addr, unsigned type)
-{
- switch (type) {
- case T_MYADDR:
- return "MYADDR";
- case T_HISADDR:
- return "HISADDR";
- case T_DNS0:
- return "DNS0";
- case T_DNS1:
- return "DNS1";
- }
- return ncprange_ntoa(addr);
-}
-
-static int
-filter_Parse(struct ncp *ncp, int argc, char const *const *argv,
- struct filterent *ofp)
-{
- struct filterent fe;
- struct protoent *pe;
- char *wp;
- int action, family, ruleno, val, width;
-
- ruleno = strtol(*argv, &wp, 0);
- if (*argv == wp || ruleno >= MAXFILTERS) {
- log_Printf(LogWARN, "Parse: invalid filter number.\n");
- return 0;
- }
- if (ruleno < 0) {
- for (ruleno = 0; ruleno < MAXFILTERS; ruleno++) {
- ofp->f_action = A_NONE;
- ofp++;
- }
- log_Printf(LogWARN, "Parse: filter cleared.\n");
- return 1;
- }
- ofp += ruleno;
-
- if (--argc == 0) {
- log_Printf(LogWARN, "Parse: missing action.\n");
- return 0;
- }
- argv++;
-
- memset(&fe, '\0', sizeof fe);
-
- val = strtol(*argv, &wp, 0);
- if (!*wp && val >= 0 && val < MAXFILTERS) {
- if (val <= ruleno) {
- log_Printf(LogWARN, "Parse: Can only jump forward from rule %d\n",
- ruleno);
- return 0;
- }
- action = val;
- } else if (!strcmp(*argv, "permit")) {
- action = A_PERMIT;
- } else if (!strcmp(*argv, "deny")) {
- action = A_DENY;
- } else if (!strcmp(*argv, "clear")) {
- ofp->f_action = A_NONE;
- return 1;
- } else {
- log_Printf(LogWARN, "Parse: %s: bad action\n", *argv);
- return 0;
- }
- fe.f_action = action;
-
- argc--;
- argv++;
-
- if (argc && argv[0][0] == '!' && !argv[0][1]) {
- fe.f_invert = 1;
- argc--;
- argv++;
- }
-
- ncprange_init(&fe.f_src);
- ncprange_init(&fe.f_dst);
-
- if (argc == 0)
- pe = NULL;
- else if ((pe = getprotobyname(*argv)) == NULL && strcmp(*argv, "all") != 0) {
- if (argc < 2) {
- log_Printf(LogWARN, "Parse: Protocol or address pair expected\n");
- return 0;
- } else if (strcasecmp(*argv, "any") == 0 ||
- ncprange_aton(&fe.f_src, ncp, *argv)) {
- family = ncprange_family(&fe.f_src);
- if (!ncprange_getwidth(&fe.f_src, &width))
- width = 0;
- if (width == 0)
- ncprange_init(&fe.f_src);
- fe.f_srctype = addrtype(*argv);
- argc--;
- argv++;
-
- if (strcasecmp(*argv, "any") == 0 ||
- ncprange_aton(&fe.f_dst, ncp, *argv)) {
- if (ncprange_family(&fe.f_dst) != AF_UNSPEC &&
- ncprange_family(&fe.f_src) != AF_UNSPEC &&
- family != ncprange_family(&fe.f_dst)) {
- log_Printf(LogWARN, "Parse: src and dst address families differ\n");
- return 0;
- }
- if (!ncprange_getwidth(&fe.f_dst, &width))
- width = 0;
- if (width == 0)
- ncprange_init(&fe.f_dst);
- fe.f_dsttype = addrtype(*argv);
- argc--;
- argv++;
- } else {
- log_Printf(LogWARN, "Parse: Protocol or address pair expected\n");
- return 0;
- }
-
- if (argc) {
- if ((pe = getprotobyname(*argv)) == NULL && strcmp(*argv, "all") != 0) {
- log_Printf(LogWARN, "Parse: %s: Protocol expected\n", *argv);
- return 0;
- } else {
- argc--;
- argv++;
- }
- }
- } else {
- log_Printf(LogWARN, "Parse: Protocol or address pair expected\n");
- return 0;
- }
- } else {
- argc--;
- argv++;
- }
-
- if (argc >= 2 && strcmp(*argv, "timeout") == 0) {
- fe.timeout = strtoul(argv[1], NULL, 10);
- argc -= 2;
- argv += 2;
- }
-
- val = 1;
- fe.f_proto = (pe == NULL) ? 0 : pe->p_proto;
-
- switch (fe.f_proto) {
- case IPPROTO_TCP:
- case IPPROTO_UDP:
- case IPPROTO_IPIP:
-#ifndef NOINET6
- case IPPROTO_IPV6:
-#endif
- val = ParseUdpOrTcp(argc, argv, pe, &fe);
- break;
- case IPPROTO_ICMP:
-#ifndef NOINET6
- case IPPROTO_ICMPV6:
-#endif
- val = ParseIcmp(argc, argv, &fe);
- break;
- default:
- val = ParseGeneric(argc, &fe);
- break;
- }
-
- log_Printf(LogDEBUG, "Parse: Src: %s\n", ncprange_ntoa(&fe.f_src));
- log_Printf(LogDEBUG, "Parse: Dst: %s\n", ncprange_ntoa(&fe.f_dst));
- log_Printf(LogDEBUG, "Parse: Proto: %d\n", fe.f_proto);
-
- log_Printf(LogDEBUG, "Parse: src: %s (%d)\n",
- filter_Op2Nam(fe.f_srcop), fe.f_srcport);
- log_Printf(LogDEBUG, "Parse: dst: %s (%d)\n",
- filter_Op2Nam(fe.f_dstop), fe.f_dstport);
- log_Printf(LogDEBUG, "Parse: estab: %u\n", fe.f_estab);
- log_Printf(LogDEBUG, "Parse: syn: %u\n", fe.f_syn);
- log_Printf(LogDEBUG, "Parse: finrst: %u\n", fe.f_finrst);
-
- if (val)
- *ofp = fe;
-
- return val;
-}
-
-int
-filter_Set(struct cmdargs const *arg)
-{
- struct filter *filter;
-
- if (arg->argc < arg->argn+2)
- return -1;
-
- if (!strcmp(arg->argv[arg->argn], "in"))
- filter = &arg->bundle->filter.in;
- else if (!strcmp(arg->argv[arg->argn], "out"))
- filter = &arg->bundle->filter.out;
- else if (!strcmp(arg->argv[arg->argn], "dial"))
- filter = &arg->bundle->filter.dial;
- else if (!strcmp(arg->argv[arg->argn], "alive"))
- filter = &arg->bundle->filter.alive;
- else {
- log_Printf(LogWARN, "filter_Set: %s: Invalid filter name.\n",
- arg->argv[arg->argn]);
- return -1;
- }
-
- filter_Parse(&arg->bundle->ncp, arg->argc - arg->argn - 1,
- arg->argv + arg->argn + 1, filter->rule);
- return 0;
-}
-
-const char *
-filter_Action2Nam(unsigned act)
-{
- static const char * const actname[] = { " none ", "permit ", " deny " };
- static char buf[8];
-
- if (act < MAXFILTERS) {
- snprintf(buf, sizeof buf, "%6d ", act);
- return buf;
- } else if (act >= A_NONE && act < A_NONE + sizeof(actname)/sizeof(char *))
- return actname[act - A_NONE];
- else
- return "?????? ";
-}
-
-static void
-doShowFilter(struct filterent *fp, struct prompt *prompt)
-{
- struct protoent *pe;
- int n;
-
- for (n = 0; n < MAXFILTERS; n++, fp++) {
- if (fp->f_action != A_NONE) {
- prompt_Printf(prompt, " %2d %s", n, filter_Action2Nam(fp->f_action));
- prompt_Printf(prompt, "%c ", fp->f_invert ? '!' : ' ');
-
- if (ncprange_isset(&fp->f_src))
- prompt_Printf(prompt, "%s ", addrstr(&fp->f_src, fp->f_srctype));
- else
- prompt_Printf(prompt, "any ");
-
- if (ncprange_isset(&fp->f_dst))
- prompt_Printf(prompt, "%s ", addrstr(&fp->f_dst, fp->f_dsttype));
- else
- prompt_Printf(prompt, "any ");
-
- if (fp->f_proto) {
- if ((pe = getprotobynumber(fp->f_proto)) == NULL)
- prompt_Printf(prompt, "P:%d", fp->f_proto);
- else
- prompt_Printf(prompt, "%s", pe->p_name);
-
- if (fp->f_srcop)
- prompt_Printf(prompt, " src %s %d", filter_Op2Nam(fp->f_srcop),
- fp->f_srcport);
- if (fp->f_dstop)
- prompt_Printf(prompt, " dst %s %d", filter_Op2Nam(fp->f_dstop),
- fp->f_dstport);
- if (fp->f_estab)
- prompt_Printf(prompt, " estab");
- if (fp->f_syn)
- prompt_Printf(prompt, " syn");
- if (fp->f_finrst)
- prompt_Printf(prompt, " finrst");
- } else
- prompt_Printf(prompt, "all");
- if (fp->timeout != 0)
- prompt_Printf(prompt, " timeout %u", fp->timeout);
- prompt_Printf(prompt, "\n");
- }
- }
-}
-
-int
-filter_Show(struct cmdargs const *arg)
-{
- if (arg->argc > arg->argn+1)
- return -1;
-
- if (arg->argc == arg->argn+1) {
- struct filter *filter;
-
- if (!strcmp(arg->argv[arg->argn], "in"))
- filter = &arg->bundle->filter.in;
- else if (!strcmp(arg->argv[arg->argn], "out"))
- filter = &arg->bundle->filter.out;
- else if (!strcmp(arg->argv[arg->argn], "dial"))
- filter = &arg->bundle->filter.dial;
- else if (!strcmp(arg->argv[arg->argn], "alive"))
- filter = &arg->bundle->filter.alive;
- else
- return -1;
- doShowFilter(filter->rule, arg->prompt);
- } else {
- struct filter *filter[4];
- int f;
-
- filter[0] = &arg->bundle->filter.in;
- filter[1] = &arg->bundle->filter.out;
- filter[2] = &arg->bundle->filter.dial;
- filter[3] = &arg->bundle->filter.alive;
- for (f = 0; f < 4; f++) {
- if (f)
- prompt_Printf(arg->prompt, "\n");
- prompt_Printf(arg->prompt, "%s:\n", filter[f]->name);
- doShowFilter(filter[f]->rule, arg->prompt);
- }
- }
-
- return 0;
-}
-
-static const char * const opname[] = {"none", "eq", "gt", "lt"};
-
-const char *
-filter_Op2Nam(unsigned op)
-{
- if (op >= sizeof opname / sizeof opname[0])
- return "unknown";
- return opname[op];
-
-}
-
-static unsigned
-filter_Nam2Op(const char *cp)
-{
- unsigned op;
-
- for (op = sizeof opname / sizeof opname[0] - 1; op; op--)
- if (!strcasecmp(cp, opname[op]))
- break;
-
- return op;
-}
-
-void
-filter_AdjustAddr(struct filter *filter, struct ncpaddr *local,
- struct ncpaddr *remote, struct in_addr *dns)
-{
- struct filterent *fp;
- int n;
-
- for (fp = filter->rule, n = 0; n < MAXFILTERS; fp++, n++)
- if (fp->f_action != A_NONE) {
- if (local) {
- if (fp->f_srctype == T_MYADDR && ncpaddr_family(local) == AF_INET)
- ncprange_sethost(&fp->f_src, local);
- if (fp->f_dsttype == T_MYADDR && ncpaddr_family(local) == AF_INET)
- ncprange_sethost(&fp->f_dst, local);
-#ifndef NOINET6
- if (fp->f_srctype == T_MYADDR6 && ncpaddr_family(local) == AF_INET6)
- ncprange_sethost(&fp->f_src, local);
- if (fp->f_dsttype == T_MYADDR6 && ncpaddr_family(local) == AF_INET6)
- ncprange_sethost(&fp->f_dst, local);
-#endif
- }
- if (remote) {
- if (fp->f_srctype == T_HISADDR && ncpaddr_family(remote) == AF_INET)
- ncprange_sethost(&fp->f_src, remote);
- if (fp->f_dsttype == T_HISADDR && ncpaddr_family(remote) == AF_INET)
- ncprange_sethost(&fp->f_dst, remote);
-#ifndef NOINET6
- if (fp->f_srctype == T_HISADDR6 && ncpaddr_family(remote) == AF_INET6)
- ncprange_sethost(&fp->f_src, remote);
- if (fp->f_dsttype == T_HISADDR6 && ncpaddr_family(remote) == AF_INET6)
- ncprange_sethost(&fp->f_dst, remote);
-#endif
- }
- if (dns) {
- if (fp->f_srctype == T_DNS0)
- ncprange_setip4host(&fp->f_src, dns[0]);
- if (fp->f_dsttype == T_DNS0)
- ncprange_setip4host(&fp->f_dst, dns[0]);
- if (fp->f_srctype == T_DNS1)
- ncprange_setip4host(&fp->f_src, dns[1]);
- if (fp->f_dsttype == T_DNS1)
- ncprange_setip4host(&fp->f_dst, dns[1]);
- }
- }
-}
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