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-rw-r--r--sys/netinet/mlf_ipl.c367
1 files changed, 367 insertions, 0 deletions
diff --git a/sys/netinet/mlf_ipl.c b/sys/netinet/mlf_ipl.c
new file mode 100644
index 000000000000..3a8ee905620b
--- /dev/null
+++ b/sys/netinet/mlf_ipl.c
@@ -0,0 +1,367 @@
+/*
+ * Copyright (C) 1993-1997 by Darren Reed.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and due credit is given
+ * to the original author and the contributors.
+ */
+/*
+ * 29/12/94 Added code from Marc Huber <huber@fzi.de> to allow it to allocate
+ * its own major char number! Way cool patch!
+ */
+
+
+#include <sys/param.h>
+
+#if defined(__FreeBSD__) && (__FreeBSD__ > 1)
+# ifdef IPFILTER_LKM
+# include <osreldate.h>
+# define ACTUALLY_LKM_NOT_KERNEL
+# else
+# include <sys/osreldate.h>
+# endif
+#endif
+#include <sys/systm.h>
+#if defined(__FreeBSD_version) && (__FreeBSD_version >= 220000)
+# include <sys/conf.h>
+# include <sys/kernel.h>
+# ifdef DEVFS
+# include <sys/devfsext.h>
+# endif /*DEVFS*/
+#endif
+#include <sys/conf.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/proc.h>
+#include <sys/uio.h>
+#include <sys/kernel.h>
+#include <sys/vnode.h>
+#include <sys/namei.h>
+#include <sys/malloc.h>
+#include <sys/mount.h>
+#include <sys/exec.h>
+#include <sys/mbuf.h>
+#if BSD >= 199506
+# include <sys/sysctl.h>
+#endif
+#if (__FreeBSD_version >= 199511)
+#include <net/if.h>
+#include <netinet/in_systm.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <net/route.h>
+#include <netinet/ip_var.h>
+#include <netinet/tcp.h>
+#include <netinet/tcpip.h>
+#endif
+#if (__FreeBSD__ > 1)
+# include <sys/sysent.h>
+#endif
+#include <sys/lkm.h>
+#include "netinet/ipl.h"
+#include "netinet/ip_compat.h"
+#include "netinet/ip_fil.h"
+#include "netinet/ip_state.h"
+#include "netinet/ip_nat.h"
+#include "netinet/ip_auth.h"
+#include "netinet/ip_frag.h"
+
+
+#if !defined(VOP_LEASE) && defined(LEASE_CHECK)
+#define VOP_LEASE LEASE_CHECK
+#endif
+
+#ifndef MIN
+#define MIN(a,b) (((a)<(b))?(a):(b))
+#endif
+
+extern int lkmenodev __P((void));
+
+static char *ipf_devfiles[] = { IPL_NAME, IPL_NAT, IPL_STATE, IPL_AUTH,
+ NULL };
+static int if_ipl_unload __P((struct lkm_table *, int));
+static int if_ipl_load __P((struct lkm_table *, int));
+static int if_ipl_remove __P((void));
+int xxxinit __P((struct lkm_table *, int, int));
+
+
+struct cdevsw ipldevsw =
+{
+ iplopen, /* open */
+ iplclose, /* close */
+ iplread, /* read */
+ (void *)nullop, /* write */
+ iplioctl, /* ioctl */
+ (void *)nullop, /* stop */
+ (void *)nullop, /* reset */
+ (void *)NULL, /* tty */
+ (void *)nullop, /* select */
+ (void *)nullop, /* mmap */
+ NULL /* strategy */
+};
+
+#ifdef SYSCTL_INT
+SYSCTL_NODE(_net_inet, OID_AUTO, ipf, CTLFLAG_RW, 0, "IPF");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_flags, CTLFLAG_RW, &fr_flags, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_pass, CTLFLAG_RW, &fr_pass, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_active, CTLFLAG_RD, &fr_active, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpidletimeout, CTLFLAG_RW,
+ &fr_tcpidletimeout, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosewait, CTLFLAG_RW,
+ &fr_tcpclosewait, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcplastack, CTLFLAG_RW,
+ &fr_tcplastack, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcptimeout, CTLFLAG_RW,
+ &fr_tcptimeout, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_tcpclosed, CTLFLAG_RW,
+ &fr_tcpclosed, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_udptimeout, CTLFLAG_RW,
+ &fr_udptimeout, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_icmptimeout, CTLFLAG_RW,
+ &fr_icmptimeout, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_defnatage, CTLFLAG_RW,
+ &fr_defnatage, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_ipfrttl, CTLFLAG_RW,
+ &fr_ipfrttl, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, ipl_unreach, CTLFLAG_RW,
+ &ipl_unreach, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, ipl_inited, CTLFLAG_RD,
+ &ipl_inited, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_authsize, CTLFLAG_RD,
+ &fr_authsize, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_authused, CTLFLAG_RD,
+ &fr_authused, 0, "");
+SYSCTL_INT(_net_inet_ipf, OID_AUTO, fr_defaultauthage, CTLFLAG_RW,
+ &fr_defaultauthage, 0, "");
+#endif
+
+#if !defined(__FreeBSD_version) || (__FreeBSD_version < 220000)
+int ipl_major = 0;
+
+MOD_DEV(IPL_VERSION, LM_DT_CHAR, -1, &ipldevsw);
+
+extern struct cdevsw cdevsw[];
+extern int vd_unuseddev __P((void));
+extern int nchrdev;
+#else
+int ipl_major = CDEV_MAJOR;
+
+static struct cdevsw ipl_cdevsw = {
+ iplopen, iplclose, iplread, nowrite, /* 79 */
+ iplioctl, nostop, noreset, nodevtotty,
+ noselect, nommap, nostrategy, "ipl",
+ NULL, -1
+};
+#endif
+
+
+static int iplaction __P((struct lkm_table *, int));
+
+
+static int iplaction(lkmtp, cmd)
+struct lkm_table *lkmtp;
+int cmd;
+{
+#if !defined(__FreeBSD_version) || (__FreeBSD_version < 220000)
+ int i = ipl_major;
+ struct lkm_dev *args = lkmtp->private.lkm_dev;
+#endif
+ int err = 0;
+
+ switch (cmd)
+ {
+ case LKM_E_LOAD :
+ if (lkmexists(lkmtp))
+ return EEXIST;
+
+#if !defined(__FreeBSD_version) || (__FreeBSD_version < 220000)
+ for (i = 0; i < nchrdev; i++)
+ if (cdevsw[i].d_open == lkmenodev ||
+ cdevsw[i].d_open == iplopen)
+ break;
+ if (i == nchrdev) {
+ printf("IP Filter: No free cdevsw slots\n");
+ return ENODEV;
+ }
+
+ ipl_major = i;
+ args->lkm_offset = i; /* slot in cdevsw[] */
+#endif
+ printf("IP Filter: loaded into slot %d\n", ipl_major);
+ return if_ipl_load(lkmtp, cmd);
+ break;
+ case LKM_E_UNLOAD :
+ err = if_ipl_unload(lkmtp, cmd);
+ if (!err)
+ printf("IP Filter: unloaded from slot %d\n",
+ ipl_major);
+ return err;
+ case LKM_E_STAT :
+ break;
+ default:
+ err = EIO;
+ break;
+ }
+ return 0;
+}
+
+
+static int if_ipl_remove __P((void))
+{
+ char *name;
+ struct nameidata nd;
+ int error, i;
+
+ for (i = 0; (name = ipf_devfiles[i]); i++) {
+ NDINIT(&nd, DELETE, LOCKPARENT, UIO_SYSSPACE, name, curproc);
+ if ((error = namei(&nd)))
+ return (error);
+ VOP_LEASE(nd.ni_vp, curproc, curproc->p_ucred, LEASE_WRITE);
+ VOP_LOCK(nd.ni_vp);
+ VOP_LEASE(nd.ni_dvp, curproc, curproc->p_ucred, LEASE_WRITE);
+ (void) VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd);
+ }
+
+ return 0;
+}
+
+
+static int if_ipl_unload(lkmtp, cmd)
+struct lkm_table *lkmtp;
+int cmd;
+{
+ int error = 0;
+
+ error = ipldetach();
+ if (!error)
+ error = if_ipl_remove();
+ return error;
+}
+
+
+static int if_ipl_load(lkmtp, cmd)
+struct lkm_table *lkmtp;
+int cmd;
+{
+ struct nameidata nd;
+ struct vattr vattr;
+ int error = 0, fmode = S_IFCHR|0600, i;
+ char *name;
+
+ error = iplattach();
+ if (error)
+ return error;
+ (void) if_ipl_remove();
+
+ for (i = 0; (name = ipf_devfiles[i]); i++) {
+ NDINIT(&nd, CREATE, LOCKPARENT, UIO_SYSSPACE, name, curproc);
+ if ((error = namei(&nd)))
+ return error;
+ if (nd.ni_vp != NULL) {
+ VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd);
+ if (nd.ni_dvp == nd.ni_vp)
+ vrele(nd.ni_dvp);
+ else
+ vput(nd.ni_dvp);
+ vrele(nd.ni_vp);
+ return (EEXIST);
+ }
+ VATTR_NULL(&vattr);
+ vattr.va_type = VCHR;
+ vattr.va_mode = (fmode & 07777);
+ vattr.va_rdev = (ipl_major << 8) | i;
+ VOP_LEASE(nd.ni_dvp, curproc, curproc->p_ucred, LEASE_WRITE);
+ error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr);
+ if (error)
+ return error;
+ }
+ return 0;
+}
+
+
+#if defined(__FreeBSD_version) && (__FreeBSD_version < 220000)
+/*
+ * strlen isn't present in 2.1.* kernels.
+ */
+size_t strlen(string)
+char *string;
+{
+ register char *s;
+
+ for (s = string; *s; s++)
+ ;
+ return (size_t)(s - string);
+}
+
+
+int xxxinit(lkmtp, cmd, ver)
+struct lkm_table *lkmtp;
+int cmd, ver;
+{
+ DISPATCH(lkmtp, cmd, ver, iplaction, iplaction, iplaction);
+}
+#else
+# ifdef IPFILTER_LKM
+# include <sys/exec.h>
+
+MOD_DECL(if_ipl);
+
+
+static struct lkm_dev _module = {
+ LM_DEV,
+ LKM_VERSION,
+ IPL_VERSION,
+ CDEV_MAJOR,
+ LM_DT_CHAR,
+ { (void *)&ipl_cdevsw }
+};
+
+
+int if_ipl __P((struct lkm_table *, int, int));
+
+
+int if_ipl(lkmtp, cmd, ver)
+struct lkm_table *lkmtp;
+int cmd, ver;
+{
+ DISPATCH(lkmtp, cmd, ver, iplaction, iplaction, iplaction);
+}
+# else
+
+#ifdef DEVFS
+static void *ipf_devfs_token[IPL_LOGMAX + 1];
+#endif
+static ipl_devsw_installed = 0;
+
+static void ipl_drvinit __P((void *unused))
+{
+ dev_t dev;
+#ifdef DEVFS
+ void **tp = ipf_devfs_token;
+#endif
+
+ if (!ipl_devsw_installed ) {
+ dev = makedev(CDEV_MAJOR, 0);
+ cdevsw_add(&dev, &ipl_cdevsw, NULL);
+ ipl_devsw_installed = 1;
+
+#ifdef DEVFS
+ tp[IPL_LOGIPF] = devfs_add_devswf(&ipl_cdevsw, IPL_LOGIPF,
+ DV_CHR, 0, 0, 0600,
+ "ipf", IPL_LOGIPF);
+ tp[IPL_LOGNAT] = devfs_add_devswf(&ipl_cdevsw, IPL_LOGNAT,
+ DV_CHR, 0, 0, 0600,
+ "ipnat", IPL_LOGNAT);
+ tp[IPL_LOGSTATE] = devfs_add_devswf(&ipl_cdevsw, IPL_LOGSTATE,
+ DV_CHR, 0, 0, 0600,
+ "ipstate", IPL_LOGSTATE);
+ tp[IPL_LOGAUTH] = devfs_add_devswf(&ipl_cdevsw, IPL_LOGAUTH,
+ DV_CHR, 0, 0, 0600,
+ "ipstate", IPL_LOGAUTH);
+#endif
+ }
+}
+
+SYSINIT(ipldev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ipl_drvinit,NULL)
+# endif /* IPFILTER_LKM */
+#endif /* _FreeBSD_version */