diff options
author | darrenr <darrenr@FreeBSD.org> | 1997-04-03 10:22:02 +0000 |
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committer | darrenr <darrenr@FreeBSD.org> | 1997-04-03 10:22:02 +0000 |
commit | d25503500842fdd0550710a7afb953d1b8f20f00 (patch) | |
tree | f687cfed6c59d74a7c81b967eb3caf8a9c5f184e /contrib/ipfilter/ip_fil.c | |
parent | 2d94e888ee6d73e6d599e49598a12d8da9f74f69 (diff) | |
download | FreeBSD-src-d25503500842fdd0550710a7afb953d1b8f20f00.zip FreeBSD-src-d25503500842fdd0550710a7afb953d1b8f20f00.tar.gz |
Import IP Filter version 3.2alpha4 to bring in working LKM for 2.2
Diffstat (limited to 'contrib/ipfilter/ip_fil.c')
-rw-r--r-- | contrib/ipfilter/ip_fil.c | 444 |
1 files changed, 328 insertions, 116 deletions
diff --git a/contrib/ipfilter/ip_fil.c b/contrib/ipfilter/ip_fil.c index fec4846..353d7a6 100644 --- a/contrib/ipfilter/ip_fil.c +++ b/contrib/ipfilter/ip_fil.c @@ -7,17 +7,39 @@ */ #if !defined(lint) && defined(LIBC_SCCS) static char sccsid[] = "@(#)ip_fil.c 2.41 6/5/96 (C) 1993-1995 Darren Reed"; -static char rcsid[] = "$Id: ip_fil.c,v 2.0.1.7 1997/02/19 12:45:02 darrenr Exp $"; +static char rcsid[] = "$Id: ip_fil.c,v 2.0.2.6 1997/04/02 12:23:19 darrenr Exp $"; #endif +#ifndef SOLARIS +#define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4))) +#endif + +#ifdef __FreeBSD__ +#include <osreldate.h> +#endif +#ifndef _KERNEL +#include <stdio.h> +#include <string.h> +#endif #include <sys/errno.h> #include <sys/types.h> #include <sys/param.h> #include <sys/file.h> #include <sys/ioctl.h> +#include <sys/time.h> +#ifdef _KERNEL #include <sys/systm.h> +#endif #include <sys/uio.h> +#if !SOLARIS +#include <sys/dir.h> #include <sys/mbuf.h> +#else +#define bcmp memcmp +#define bzero(a,b) memset(a,0,b) +#define bcopy(a,b,c) memcpy(b,a,c) +#include <sys/filio.h> +#endif #include <sys/protosw.h> #include <sys/socket.h> @@ -36,8 +58,8 @@ static char rcsid[] = "$Id: ip_fil.c,v 2.0.1.7 1997/02/19 12:45:02 darrenr Exp $ #include <netinet/tcpip.h> #include <netinet/ip_icmp.h> #include <syslog.h> -#include "ip_fil.h" #include "ip_compat.h" +#include "ip_fil.h" #include "ip_frag.h" #include "ip_nat.h" #include "ip_state.h" @@ -47,45 +69,49 @@ static char rcsid[] = "$Id: ip_fil.c,v 2.0.1.7 1997/02/19 12:45:02 darrenr Exp $ extern fr_flags, fr_active; extern struct protosw inetsw[]; -extern int (*fr_checkp)(); #if BSD < 199306 -extern int ipfr_slowtimer(); -static int (*fr_saveslowtimo)(); +static int (*fr_saveslowtimo) __P((void)); extern int tcp_ttl; #else -extern void ipfr_slowtimer(); -static void (*fr_saveslowtimo)(); +static void (*fr_saveslowtimo) __P((void)); #endif int ipl_inited = 0; int ipl_unreach = ICMP_UNREACH_FILTER; -int send_reset(); + +#ifndef _KERNEL +#include "ipt.h" +static struct ifnet **ifneta = NULL; +static int nifs = 0; +struct ifnet *get_unit __P((char *)); +#endif #ifdef IPFILTER_LOG -# define LOGSIZE 8192 -int ipllog(); -char iplbuf[LOGSIZE]; -caddr_t iplh = iplbuf, iplt = iplbuf; -static int iplused = 0; +char iplbuf[3][IPLLOGSIZE]; +caddr_t iplh[3], iplt[3]; +int iplused[3] = {0,0,0}; #endif /* IPFILTER_LOG */ -static void frflush(); -static int frrequest(); -static int (*fr_savep)() = NULL; +static void frflush __P((caddr_t)); +static int frrequest __P((int, caddr_t, int)); +static void frzerostats __P((caddr_t)); +#ifdef _KERNEL +static int (*fr_savep) __P((struct ip *, int, struct ifnet *, + int, struct mbuf **)); +#else +void init_ifp __P((void)); +static int (*fr_savep) __P((struct ip *, int, struct ifnet *, + int, char *)); +static int no_output __P((struct ifnet *, struct mbuf *, + struct sockaddr *, struct rtentry *)); +static int write_output __P((struct ifnet *, struct mbuf *, + struct sockaddr *, struct rtentry *)); +#endif + -#if _BSDI_VERSION >= 199501 +#if (_BSDI_VERSION >= 199510) && defined(_KERNEL) # include <sys/device.h> # include <sys/conf.h> -int iplioctl __P((dev_t, int, caddr_t, int, struct proc *)); -int iplopen __P((dev_t, int, int, struct proc *)); -int iplclose __P((dev_t, int, int, struct proc *)); -# ifdef IPFILTER_LOG -int iplread __P((dev_t, struct uio *, int)); -# else -# define iplread noread -# endif -int iplioctl __P((dev_t, int, caddr_t, int, struct proc *)); - struct cfdriver iplcd = { NULL, "ipl", NULL, NULL, DV_DULL, 0 }; @@ -96,9 +122,11 @@ struct devsw iplsw = { nostrat, nodump, nopsize, 0, nostop }; -#endif /* _BSDI_VERSION >= 199501 */ +#endif /* _BSDI_VERSION >= 199510 && _KERNEL */ + -#ifdef IPFILTER_LKM +#ifdef _KERNEL +# ifdef IPFILTER_LKM int iplidentify(s) char *s; { @@ -106,12 +134,12 @@ char *s; return 1; return 0; } -#endif /* IPFILTER_LKM */ +# endif /* IPFILTER_LKM */ int iplattach() { - int s; + int s, i; SPLNET(s); if (ipl_inited || (fr_checkp == fr_check)) { @@ -125,6 +153,14 @@ int iplattach() fr_checkp = fr_check; fr_saveslowtimo = inetsw[0].pr_slowtimo; inetsw[0].pr_slowtimo = ipfr_slowtimer; + + /* + * Set log buffer pointers for each of the log buffers + */ + for (i = 0; i <= 2; i++) { + iplh[i] = iplbuf[i]; + iplt[i] = iplbuf[i]; + } SPLX(s); return 0; } @@ -142,7 +178,9 @@ int ipldetach() return EBUSY; } +#if defined(IPFILTER_LKM) || defined(IPFILTER) fr_checkp = fr_savep; +#endif inetsw[0].pr_slowtimo = fr_saveslowtimo; frflush((caddr_t)&i); ipl_inited = 0; @@ -154,6 +192,7 @@ int ipldetach() SPLX(s); return 0; } +#endif /* _KERNEL */ static void frzerostats(data) @@ -219,7 +258,7 @@ caddr_t data; * Filter ioctl interface. */ int iplioctl(dev, cmd, data, mode -#if _BSDI_VERSION >= 199501 +#if ((_BSDI_VERSION >= 199510) || (BSD >= 199506)) && defined(_KERNEL) , p) struct proc *p; #else @@ -232,18 +271,20 @@ int mode; { int error = 0, s, unit; +#ifdef _KERNEL unit = minor(dev); - if (unit != 0) + if ((2 < unit) || (unit < 0)) return ENXIO; +#endif SPLNET(s); switch (cmd) { case FIONREAD : #ifdef IPFILTER_LOG - *(int *)data = iplused; + *(int *)data = iplused[unit]; #endif break; -#ifndef IPFILTER_LKM +#if !defined(IPFILTER_LKM) && defined(_KERNEL) case SIOCFRENB : { u_int enable; @@ -330,9 +371,9 @@ int mode; if (!(mode & FWRITE)) error = EPERM; else { - *(int *)data = iplused; - iplh = iplt = iplbuf; - iplused = 0; + *(int *)data = iplused[unit]; + iplh[unit] = iplt[unit] = iplbuf[unit]; + iplused[unit] = 0; } break; #endif /* IPFILTER_LOG */ @@ -365,16 +406,13 @@ caddr_t data; { register frentry_t *fp, *f, **fprev; register frentry_t **ftail; - frentry_t fr; + frentry_t frd; frdest_t *fdp; - struct frentry frd; int error = 0, in; - fp = &fr; + fp = &frd; IRCOPY(data, (caddr_t)fp, sizeof(*fp)); - bzero((char *)frcache, sizeof(frcache[0]) * 2); - in = (fp->fr_flags & FR_INQUE) ? 0 : 1; if (fp->fr_flags & FR_ACCOUNT) { ftail = fprev = &ipacct[in][set]; @@ -383,8 +421,8 @@ caddr_t data; else return ESRCH; - IRCOPY((char *)fp, (char *)&frd, sizeof(frd)); - fp = &frd; + bzero((char *)frcache, sizeof(frcache[0]) * 2); + if (*fp->fr_ifname) { fp->fr_ifa = GETUNIT(fp->fr_ifname); if (!fp->fr_ifa) @@ -451,7 +489,8 @@ caddr_t data; if (f) error = EEXIST; else { - if ((f = (struct frentry *)KMALLOC(sizeof(*f)))) { + KMALLOC(f, frentry_t *, sizeof(*f)); + if (f != NULL) { bcopy((char *)fp, (char *)f, sizeof(*f)); f->fr_hits = 0; f->fr_next = *ftail; @@ -464,44 +503,48 @@ caddr_t data; } -#if !defined(linux) +#ifdef _KERNEL /* * routines below for saving IP headers to buffer */ int iplopen(dev, flags -#if _BSDI_VERSION >= 199501 +#if ((_BSDI_VERSION >= 199510) || (BSD >= 199506)) && defined(_KERNEL) , devtype, p) int devtype; struct proc *p; -#else +# else ) -#endif +# endif dev_t dev; int flags; { u_int min = minor(dev); - if (min) + if (2 < min) min = ENXIO; + else + min = 0; return min; } int iplclose(dev, flags -#if _BSDI_VERSION >= 199501 +#if ((_BSDI_VERSION >= 199510) || (BSD >= 199506)) && defined(_KERNEL) , devtype, p) int devtype; struct proc *p; -#else +# else ) -#endif +# endif dev_t dev; int flags; { u_int min = minor(dev); - if (min) + if (2 < min) min = ENXIO; + else + min = 0; return min; } @@ -521,52 +564,57 @@ int iplread(dev, uio) dev_t dev; register struct uio *uio; { - register int ret, s; + register int ret, s, unit; register size_t sz, sx; int error; + unit = minor(dev); + if ((2 < unit) || (unit < 0)) + return ENXIO; + if (!uio->uio_resid) return 0; - while (!iplused) { - error = SLEEP(iplbuf, "ipl sleep"); + + while (!iplused[unit]) { + error = SLEEP(iplbuf[unit], "ipl sleep"); if (error) return error; } SPLNET(s); - sx = sz = MIN(uio->uio_resid, iplused); - if (iplh < iplt) - sz = MIN(sz, LOGSIZE - (iplt - iplbuf)); + sx = sz = MIN(uio->uio_resid, iplused[unit]); + if (iplh[unit] < iplt[unit]) + sz = MIN(sz, IPLLOGSIZE - (iplt[unit] - iplbuf[unit])); sx -= sz; # if BSD >= 199306 || defined(__FreeBSD__) uio->uio_rw = UIO_READ; # endif - if (!(ret = UIOMOVE(iplt, sz, UIO_READ, uio))) { - iplt += sz; - iplused -= sz; - if ((iplh < iplt) && (iplt == iplbuf + LOGSIZE)) - iplt = iplbuf; - - if (sx && !(ret = UIOMOVE(iplt, sx, UIO_READ, uio))) { - iplt += sx; - iplused -= sx; - if ((iplh < iplt) && (iplt == iplbuf + LOGSIZE)) - iplt = iplbuf; + if (!(ret = UIOMOVE(iplt[unit], sz, UIO_READ, uio))) { + iplt[unit] += sz; + iplused[unit] -= sz; + if ((iplh[unit] < iplt[unit]) && (iplt[unit] == iplbuf[unit] + IPLLOGSIZE)) + iplt[unit] = iplbuf[unit]; + + if (sx && !(ret = UIOMOVE(iplt[unit], sx, UIO_READ, uio))) { + iplt[unit] += sx; + iplused[unit] -= sx; + if ((iplh[unit] < iplt[unit]) && (iplt[unit] == iplbuf[unit] + IPLLOGSIZE)) + iplt[unit] = iplbuf[unit]; } - if (!iplused) /* minimise wrapping around the end */ - iplh = iplt = iplbuf; + if (!iplused[unit]) /* minimise wrapping around the end */ + iplh[unit] = iplt[unit] = iplbuf[unit]; } SPLX(s); return ret; } # endif /* IPFILTER_LOG */ -#endif /* linux */ -#ifdef IPFILTER_LOG -int ipllog(flags, ip, fin, m) +# ifdef IPFILTER_LOG +int ipllog(flags, dev, ip, fin, m) u_int flags; +int dev; ip_t *ip; register fr_info_t *fin; struct mbuf *m; @@ -597,16 +645,16 @@ struct mbuf *m; mlen = (flags & FR_LOGBODY) ? MIN(ip->ip_len - hlen, 128) : 0; len = hlen + sizeof(iplci) + mlen; - if (iplused + len > LOGSIZE) + if (iplused[dev] + len > IPLLOGSIZE) return 0; - iplused += len; + iplused[dev] += len; -# ifdef sun +# ifdef sun uniqtime(&iplci); -# endif -# if BSD >= 199306 || defined(__FreeBSD__) +# endif +# if BSD >= 199306 || defined(__FreeBSD__) microtime((struct timeval *)&iplci); -# endif +# endif iplci.flags = flags; iplci.hlen = (u_char)hlen; iplci.plen = (u_char)mlen; @@ -619,22 +667,25 @@ struct mbuf *m; if ((iplci.ifname[1] = ifp->if_name[1])) if ((iplci.ifname[2] = ifp->if_name[2])) iplci.ifname[3] = ifp->if_name[3]; -# endif +# endif + if (iplh[dev] == iplbuf[dev] + IPLLOGSIZE) + iplh[dev] = iplbuf[dev]; + /* * Gauranteed to succeed from above */ - (void) fr_copytolog(&iplci, sizeof(iplci)); + (void) fr_copytolog(dev, (char *)&iplci, sizeof(iplci)); for (len -= sizeof(iplci); m && len > 0; m = m->m_next, len -= hlen) { hlen = MIN(len, m->m_len); - if (fr_copytolog(mtod(m, char *), hlen)) + if (fr_copytolog(dev, mtod(m, char *), hlen)) break; } - wakeup(iplbuf); + wakeup(iplbuf[dev]); return 1; } -#endif /* IPFILTER_LOG */ +# endif /* IPFILTER_LOG */ /* * send_reset - this could conceivably be a call to tcp_respond(), but that @@ -651,22 +702,22 @@ struct tcpiphdr *ti; if (ti->ti_flags & TH_RST) return -1; /* feedback loop */ -#if BSD < 199306 +# if BSD < 199306 m = m_get(M_DONTWAIT, MT_HEADER); -#else +# else m = m_gethdr(M_DONTWAIT, MT_HEADER); m->m_data += max_linkhdr; -#endif +# endif if (m == NULL) return -1; if (ti->ti_flags & TH_SYN) tlen = 1; m->m_len = sizeof (struct tcpiphdr); -#if BSD >= 199306 +# if BSD >= 199306 m->m_pkthdr.len = sizeof (struct tcpiphdr); m->m_pkthdr.rcvif = (struct ifnet *)0; -#endif +# endif bzero(mtod(m, char *), sizeof(struct tcpiphdr)); ip = mtod(m, struct ip *); tp = mtod(m, struct tcpiphdr *); @@ -686,11 +737,11 @@ struct tcpiphdr *ti; ip->ip_tos = ((struct ip *)ti)->ip_tos; ip->ip_p = ((struct ip *)ti)->ip_p; ip->ip_len = sizeof (struct tcpiphdr); -#if BSD < 199306 +# if BSD < 199306 ip->ip_ttl = tcp_ttl; -#else +# else ip->ip_ttl = ip_defttl; -#endif +# endif /* * extra 0 in case of multicast @@ -700,13 +751,18 @@ struct tcpiphdr *ti; } -#ifndef IPFILTER_LKM -void iplinit() +# ifndef IPFILTER_LKM +# if BSD < 199306 +int +# else +void +# endif +iplinit() { (void) iplattach(); ip_init(); } -#endif +# endif void ipfr_fastroute(m0, fin, fdp) @@ -738,12 +794,12 @@ frdest_t *fdp; #if (BSD >= 199306) && !defined(__NetBSD__) && !defined(__bsdi__) # ifdef RTF_CLONING rtalloc_ign(ro, RTF_CLONING); -# else +# else rtalloc_ign(ro, RTF_PRCLONING); -# endif -#else +# endif +# else rtalloc(ro); -#endif +# endif if (!ifp) { if (!(fin->fin_fr->fr_flags & FR_FASTROUTE)) { error = -2; @@ -773,19 +829,19 @@ frdest_t *fdp; * If small enough for interface, can just send directly. */ if (ip->ip_len <= ifp->if_mtu) { -#ifndef sparc +# ifndef sparc ip->ip_id = htons(ip->ip_id); ip->ip_len = htons(ip->ip_len); ip->ip_off = htons(ip->ip_off); -#endif +# endif if (!ip->ip_sum) ip->ip_sum = in_cksum(m, hlen); -#if BSD >= 199306 +# if BSD >= 199306 error = (*ifp->if_output)(ifp, m, (struct sockaddr *)dst, ro->ro_rt); -#else +# else error = (*ifp->if_output)(ifp, m, (struct sockaddr *)dst); -#endif +# endif goto done; } /* @@ -818,11 +874,11 @@ frdest_t *fdp; error = ENOBUFS; goto bad; } -#if BSD >= 199306 +# if BSD >= 199306 m->m_data += max_linkhdr; -#else +# else m->m_off = MMAXOFF - hlen; -#endif +# endif mhip = mtod(m, struct ip *); bcopy((char *)ip, (char *)mhip, sizeof(*ip)); if (hlen > sizeof (struct ip)) { @@ -843,9 +899,9 @@ frdest_t *fdp; error = ENOBUFS; /* ??? */ goto sendorfree; } -#ifndef sparc +# ifndef sparc mhip->ip_off = htons((u_short)mhip->ip_off); -#endif +# endif mhip->ip_sum = 0; mhip->ip_sum = in_cksum(m, mhlen); *mnext = m; @@ -865,13 +921,13 @@ sendorfree: m0 = m->m_act; m->m_act = 0; if (error == 0) -#if BSD >= 199306 +# if BSD >= 199306 error = (*ifp->if_output)(ifp, m, (struct sockaddr *)dst, ro->ro_rt); -#else +# else error = (*ifp->if_output)(ifp, m, (struct sockaddr *)dst); -#endif +# endif else m_freem(m); } @@ -885,3 +941,159 @@ bad: m_freem(m); goto done; } +#else /* #ifdef _KERNEL */ + + +static int no_output __P((struct ifnet *ifp, struct mbuf *m, + struct sockaddr *s, struct rtentry *rt)) +{ + return 0; +} + + +# ifdef __STDC__ +static int write_output __P((struct ifnet *ifp, struct mbuf *m, + struct sockaddr *s, struct rtentry *rt)) +{ + ip_t *ip = (ip_t *)m; +# else +static int write_output(ifp, ip) +struct ifnet *ifp; +ip_t *ip; +{ +# endif + FILE *fp; + char fname[32]; + +#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199606)) + sprintf(fname, "/tmp/%s", ifp->if_xname); + if ((fp = fopen(fname, "a"))) { + fclose(fp); + } +#else + sprintf(fname, "/tmp/%s%d", ifp->if_name, ifp->if_unit); + if ((fp = fopen(fname, "a"))) { + fwrite((char *)ip, ntohs(ip->ip_len), 1, fp); + fclose(fp); + } +#endif +} + + +struct ifnet *get_unit(name) +char *name; +{ + struct ifnet *ifp, **ifa; +#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199606)) + for (ifa = ifneta; ifa && (ifp = *ifa); ifa++) { + if (!strcmp(name, ifp->if_xname)) + return ifp; + } +#else + char ifname[32], *s; + + for (ifa = ifneta; ifa && (ifp = *ifa); ifa++) { + (void) sprintf(ifname, "%s%d", ifp->if_name, ifp->if_unit); + if (!strcmp(name, ifname)) + return ifp; + } +#endif + + if (!ifneta) { + ifneta = (struct ifnet **)malloc(sizeof(ifp) * 2); + ifneta[1] = NULL; + ifneta[0] = (struct ifnet *)calloc(1, sizeof(*ifp)); + nifs = 1; + } else { + nifs++; + ifneta = (struct ifnet **)realloc(ifneta, + (nifs + 1) * sizeof(*ifa)); + ifneta[nifs] = NULL; + ifneta[nifs - 1] = (struct ifnet *)malloc(sizeof(*ifp)); + } + ifp = ifneta[nifs - 1]; + +#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199606)) + strncpy(ifp->if_xname, name, sizeof(ifp->if_xname)); +#else + for (s = name; *s && !isdigit(*s); s++) + ; + if (*s && isdigit(*s)) { + ifp->if_unit = atoi(s); + ifp->if_name = (char *)malloc(s - name + 1); + strncpy(ifp->if_name, name, s - name); + ifp->if_name[s - name] = '\0'; + } else { + ifp->if_name = strdup(name); + ifp->if_unit = -1; + } +#endif + ifp->if_output = no_output; + return ifp; +} + + +void init_ifp() +{ + FILE *fp; + struct ifnet *ifp, **ifa; + char fname[32]; +#if (defined(NetBSD) && (NetBSD <= 1991011) && (NetBSD >= 199606)) + for (ifa = ifneta; ifa && (ifp = *ifa); ifa++) { + ifp->if_output = write_output; + sprintf(fname, "/tmp/%s", ifp->if_xname); + if ((fp = fopen(fname, "w"))) + fclose(fp); + } +#else + + for (ifa = ifneta; ifa && (ifp = *ifa); ifa++) { + ifp->if_output = write_output; + sprintf(fname, "/tmp/%s%d", ifp->if_name, ifp->if_unit); + if ((fp = fopen(fname, "w"))) + fclose(fp); + } +#endif +} + + +void ipfr_fastroute(ip, fin, fdp) +ip_t *ip; +fr_info_t *fin; +frdest_t *fdp; +{ + struct ifnet *ifp = fdp->fd_ifp; + + if (!ifp) + return; /* no routing table out here */ + + ip->ip_len = htons((u_short)ip->ip_len); + ip->ip_off = htons((u_short)(ip->ip_off | IP_MF)); + ip->ip_sum = 0; + (*ifp->if_output)(ifp, (void *)ip, NULL, 0); +} + + +void ipllog() +{ + verbose("l"); +} + + +int send_reset(ip, ifp) +ip_t *ip; +struct ifnet *ifp; +{ + verbose("- TCP RST sent\n"); + return 0; +} + + +int icmp_error(ip, ifp) +ip_t *ip; +struct ifnet *ifp; +{ + verbose("- TCP RST sent\n"); + return 0; +} +#endif /* _KERNEL */ |