mirror of
https://github.com/freebsd/freebsd-src
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270 lines
6.3 KiB
C
270 lines
6.3 KiB
C
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/*
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* Copyright (C) 2012 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 <sys/param.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#if defined(__FreeBSD__)
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# if defined(_KERNEL)
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# include <sys/libkern.h>
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# else
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# include <sys/unistd.h>
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# endif
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#else
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# include <sys/systm.h>
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#endif
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#include <sys/errno.h>
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#include <sys/param.h>
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#if !defined(__SVR4)
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# include <sys/mbuf.h>
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#endif
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#if defined(__FreeBSD__)
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# include <sys/sockio.h>
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#if defined(_KERNEL)
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#include <net/vnet.h>
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#else
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#define CURVNET_SET(arg)
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#define CURVNET_RESTORE()
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#define VNET_DEFINE(_t, _v) _t _v
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#define VNET_DECLARE(_t, _v) extern _t _v
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#define VNET(arg) arg
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#endif
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#else
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# include <sys/ioctl.h>
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#endif /* FreeBSD */
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#include <net/if.h>
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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 "netinet/ip_compat.h"
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#include "netinet/ip_fil.h"
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#include "netinet/ip_rules.h"
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#ifndef _KERNEL
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# include <string.h>
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#endif /* _KERNEL */
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#ifdef IPFILTER_COMPILED
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VNET_DECLARE(ipf_main_softc_t, ipfmain);
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#define V_ipfmain VNET(ipfmain)
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static u_long in_rule__0[] = {
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0, 0, 0, 0, 0, 0, 0, 0x8070d88, 0, 0, 0, 0xffffffff, 0, 0, 0, 0, 0, 0, 0, 0xffffffff, 0x1b0, 0x1, 0, 0, 0, 0x2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x40000000, 0x8002, 0, 0, 0, 0xffff, 0, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xffffffff, 0, 0, 0, 0, 0, 0, 0, 0, 0xffffffff, 0, 0, 0, 0, 0, 0, 0, 0, 0xffffffff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xffffffff, 0, 0, 0, 0
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};
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static u_long out_rule__0[] = {
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0, 0, 0, 0, 0, 0, 0, 0x8070d88, 0, 0, 0, 0xffffffff, 0, 0, 0, 0, 0, 0, 0, 0xffffffff, 0x1b0, 0x1, 0, 0, 0, 0x3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x40000000, 0x4002, 0, 0, 0, 0xffff, 0, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xffffffff, 0, 0, 0, 0, 0, 0, 0, 0, 0xffffffff, 0, 0, 0, 0, 0, 0, 0, 0, 0xffffffff, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xffffffff, 0, 0, 0, 0
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};
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frentry_t *ipf_rules_in_[1] = {
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(frentry_t *)&in_rule__0
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};
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/* XXX This file (ip_rules.c) is not part of the ipfilter tarball, it is
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XXX generated by the ipfilter build process. Unfortunately the build
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XXX process did not generate the following lines so they are added
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XXX by hand here. This is a bit of a hack but it works for now. Future
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XXX imports/merges of ipfilter may generate this so the following will
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XXX need to be removed following some future merge.
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XXX */
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frentry_t *ipf_rules_out_[1] = {
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(frentry_t *)&out_rule__0
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};
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frentry_t *ipfrule_match_in_(fin, passp)
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fr_info_t *fin;
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u_32_t *passp;
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{
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frentry_t *fr = NULL;
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fr = (frentry_t *)&in_rule__0;
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return (fr);
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}
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frentry_t *ipfrule_match_out_(fin, passp)
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fr_info_t *fin;
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u_32_t *passp;
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{
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frentry_t *fr = NULL;
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fr = (frentry_t *)&out_rule__0;
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return (fr);
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}
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static frentry_t ipfrule_out_;
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int ipfrule_add_out_(void)
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{
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int i, j, err = 0, max;
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frentry_t *fp;
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max = sizeof(ipf_rules_out_)/sizeof(frentry_t *);
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for (i = 0; i < max; i++) {
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fp = ipf_rules_out_[i];
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fp->fr_next = NULL;
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for (j = i + 1; j < max; j++)
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if (strncmp(fp->fr_names + fp->fr_group,
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ipf_rules_out_[j]->fr_names +
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ipf_rules_out_[j]->fr_group,
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FR_GROUPLEN) == 0) {
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if (ipf_rules_out_[j] != NULL)
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ipf_rules_out_[j]->fr_pnext =
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&fp->fr_next;
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fp->fr_pnext = &ipf_rules_out_[j];
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fp->fr_next = ipf_rules_out_[j];
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break;
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}
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}
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fp = &ipfrule_out_;
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bzero((char *)fp, sizeof(*fp));
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fp->fr_type = FR_T_CALLFUNC_BUILTIN;
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fp->fr_flags = FR_OUTQUE|FR_NOMATCH;
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fp->fr_data = (void *)ipf_rules_out_[0];
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fp->fr_dsize = sizeof(ipf_rules_out_[0]);
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fp->fr_family = AF_INET;
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fp->fr_func = (ipfunc_t)ipfrule_match_out_;
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err = frrequest(&V_ipfmain, IPL_LOGIPF, SIOCADDFR, (caddr_t)fp,
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V_ipfmain.ipf_active, 0);
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return (err);
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}
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int ipfrule_remove_out_(void)
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{
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int err = 0, i;
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frentry_t *fp;
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/*
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* Try to remove the outbound rule.
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*/
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if (ipfrule_out_.fr_ref > 0) {
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err = EBUSY;
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} else {
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i = sizeof(ipf_rules_out_)/sizeof(frentry_t *) - 1;
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for (; i >= 0; i--) {
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fp = ipf_rules_out_[i];
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if (fp->fr_ref > 1) {
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err = EBUSY;
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break;
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}
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}
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}
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if (err == 0)
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err = frrequest(&V_ipfmain, IPL_LOGIPF, SIOCDELFR,
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(caddr_t)&ipfrule_out_,
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V_ipfmain.ipf_active, 0);
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if (err)
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return (err);
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return (err);
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}
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static frentry_t ipfrule_in_;
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int ipfrule_add_in_(void)
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{
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int i, j, err = 0, max;
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frentry_t *fp;
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max = sizeof(ipf_rules_in_)/sizeof(frentry_t *);
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for (i = 0; i < max; i++) {
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fp = ipf_rules_in_[i];
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fp->fr_next = NULL;
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for (j = i + 1; j < max; j++)
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if (strncmp(fp->fr_names + fp->fr_group,
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ipf_rules_in_[j]->fr_names +
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ipf_rules_in_[j]->fr_group,
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FR_GROUPLEN) == 0) {
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if (ipf_rules_in_[j] != NULL)
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ipf_rules_in_[j]->fr_pnext =
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&fp->fr_next;
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fp->fr_pnext = &ipf_rules_in_[j];
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fp->fr_next = ipf_rules_in_[j];
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break;
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}
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}
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fp = &ipfrule_in_;
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bzero((char *)fp, sizeof(*fp));
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fp->fr_type = FR_T_CALLFUNC_BUILTIN;
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fp->fr_flags = FR_INQUE|FR_NOMATCH;
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fp->fr_data = (void *)ipf_rules_in_[0];
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fp->fr_dsize = sizeof(ipf_rules_in_[0]);
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fp->fr_family = AF_INET;
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fp->fr_func = (ipfunc_t)ipfrule_match_in_;
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err = frrequest(&V_ipfmain, IPL_LOGIPF, SIOCADDFR, (caddr_t)fp,
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V_ipfmain.ipf_active, 0);
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return (err);
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}
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int ipfrule_remove_in_(void)
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{
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int err = 0, i;
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frentry_t *fp;
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/*
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* Try to remove the inbound rule.
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*/
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if (ipfrule_in_.fr_ref > 0) {
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err = EBUSY;
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} else {
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i = sizeof(ipf_rules_in_)/sizeof(frentry_t *) - 1;
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for (; i >= 0; i--) {
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fp = ipf_rules_in_[i];
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if (fp->fr_ref > 1) {
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err = EBUSY;
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break;
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}
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}
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}
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if (err == 0)
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err = frrequest(&V_ipfmain, IPL_LOGIPF, SIOCDELFR,
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(caddr_t)&ipfrule_in_,
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V_ipfmain.ipf_active, 0);
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if (err)
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return (err);
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return (err);
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}
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int ipfrule_add(void)
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{
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int err;
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err = ipfrule_add_out_();
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if (err != 0)
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return (err);
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err = ipfrule_add_in_();
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if (err != 0)
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return (err);
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return (0);
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}
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int ipfrule_remove(void)
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{
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int err;
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err = ipfrule_remove_out_();
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if (err != 0)
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return (err);
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err = ipfrule_remove_in_();
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if (err != 0)
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return (err);
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return (0);
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}
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#endif /* IPFILTER_COMPILED */
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