Recover from previous dummynet screwup
This commit is contained in:
Luigi Rizzo
parent
2296e7a82a
commit
af38c68c1e
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=41993
@ -12,14 +12,14 @@
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*
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* This software is provided ``AS IS'' without any warranties of any kind.
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*
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* $Id: ip_fw.c,v 1.96 1998/08/23 03:07:14 wollman Exp $
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* $Id: ip_fw.c,v 1.100 1998/12/14 18:09:13 luigi Exp $
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*/
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/*
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* Implement IP packet firewall
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*/
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#ifndef IPFIREWALL_MODULE
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#if !defined(KLD_MODULE) && !defined(IPFIREWALL_MODULE)
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#include "opt_ipfw.h"
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#include "opt_ipdn.h"
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#include "opt_ipdivert.h"
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@ -71,9 +71,9 @@ static int fw_verbose_limit = 0;
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#define IPFW_DEFAULT_RULE ((u_int)(u_short)~0)
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LIST_HEAD (ip_fw_head, ip_fw_chain) ip_fw_chain;
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static LIST_HEAD (ip_fw_head, ip_fw_chain) ip_fw_chain;
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MALLOC_DEFINE(M_IPFW, "IpFw/IpAcct", "IpFw/IpAcct chain's");
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static MALLOC_DEFINE(M_IPFW, "IpFw/IpAcct", "IpFw/IpAcct chain's");
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#ifdef SYSCTL_NODE
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SYSCTL_NODE(_net_inet_ip, OID_AUTO, fw, CTLFLAG_RW, 0, "Firewall");
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@ -111,11 +111,6 @@ static void ipfw_report __P((struct ip_fw *f, struct ip *ip,
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static void flush_rule_ptrs(void);
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#ifdef IPFIREWALL_MODULE
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static ip_fw_chk_t *old_chk_ptr;
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static ip_fw_ctl_t *old_ctl_ptr;
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#endif
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static int ip_fw_chk __P((struct ip **pip, int hlen,
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struct ifnet *oif, u_int16_t *cookie, struct mbuf **m,
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struct ip_fw_chain **flow_id,
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@ -1275,7 +1270,10 @@ ip_fw_init(void)
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#endif
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}
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#ifdef IPFIREWALL_MODULE
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static ip_fw_chk_t *old_chk_ptr;
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static ip_fw_ctl_t *old_ctl_ptr;
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#if defined(IPFIREWALL_MODULE) && !defined(KLD_MODULE)
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#include <sys/exec.h>
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#include <sys/sysent.h>
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@ -1322,4 +1320,48 @@ ipfw_mod(struct lkm_table *lkmtp, int cmd, int ver)
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MOD_DISPATCH(ipfw, lkmtp, cmd, ver,
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ipfw_load, ipfw_unload, lkm_nullcmd);
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}
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#else
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static int
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ipfw_modevent(module_t mod, int type, void *unused)
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{
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int s;
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switch (type) {
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case MOD_LOAD:
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s = splnet();
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old_chk_ptr = ip_fw_chk_ptr;
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old_ctl_ptr = ip_fw_ctl_ptr;
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ip_fw_init();
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splx(s);
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return 0;
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case MOD_UNLOAD:
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s = splnet();
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ip_fw_chk_ptr = old_chk_ptr;
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ip_fw_ctl_ptr = old_ctl_ptr;
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while (LIST_FIRST(&ip_fw_chain) != NULL) {
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struct ip_fw_chain *fcp = LIST_FIRST(&ip_fw_chain);
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LIST_REMOVE(LIST_FIRST(&ip_fw_chain), chain);
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free(fcp->rule, M_IPFW);
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free(fcp, M_IPFW);
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}
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splx(s);
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printf("IP firewall unloaded\n");
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return 0;
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default:
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break;
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}
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return 0;
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}
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static moduledata_t ipfwmod = {
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"ipfw",
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ipfw_modevent,
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0
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};
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DECLARE_MODULE(ipfw, ipfwmod, SI_SUB_PSEUDO, SI_ORDER_ANY);
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#endif
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@ -31,7 +31,7 @@
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* SUCH DAMAGE.
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*
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* @(#)ip_input.c 8.2 (Berkeley) 1/4/94
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* $Id: ip_input.c,v 1.101 1998/09/10 08:56:40 dfr Exp $
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* $Id: ip_input.c,v 1.109 1998/12/14 18:09:13 luigi Exp $
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* $ANA: ip_input.c,v 1.5 1996/09/18 14:34:59 wollman Exp $
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*/
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@ -234,9 +234,6 @@ ip_init()
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ip_id = time_second & 0xffff;
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ipintrq.ifq_maxlen = ipqmaxlen;
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#ifdef IPFIREWALL
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ip_fw_init();
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#endif
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#ifdef DUMMYNET
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ip_dn_init();
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#endif
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@ -261,7 +258,6 @@ ip_input(struct mbuf *m)
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{
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struct ip *ip;
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struct ipq *fp;
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struct ipqent *ipqe;
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struct in_ifaddr *ia;
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int i, hlen, mff;
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u_short sum;
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@ -566,7 +562,7 @@ ip_input(struct mbuf *m)
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*/
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if (ip->ip_off & (IP_MF | IP_OFFMASK | IP_RF)) {
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if (m->m_flags & M_EXT) { /* XXX */
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if ((m = m_pullup(m, sizeof (struct ip))) == 0) {
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if ((m = m_pullup(m, hlen)) == 0) {
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ipstat.ips_toosmall++;
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#ifdef IPDIVERT
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frag_divert_port = 0;
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@ -764,13 +760,13 @@ ip_reass(m, fp, where)
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fp->ipq_id = ip->ip_id;
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fp->ipq_src = ip->ip_src;
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fp->ipq_dst = ip->ip_dst;
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fp->ipq_frags = 0;
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fp->ipq_frags = m;
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m->m_nextpkt = NULL;
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#ifdef IPDIVERT
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fp->ipq_divert = 0;
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fp->ipq_div_cookie = 0;
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#endif
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q = 0;
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goto insert;
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goto inserted;
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}
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#define GETIP(m) ((struct ip*)((m)->m_pkthdr.header))
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@ -785,7 +781,8 @@ ip_reass(m, fp, where)
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/*
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* If there is a preceding segment, it may provide some of
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* our data already. If so, drop the data from the incoming
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* segment. If it provides all of our data, drop us.
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* segment. If it provides all of our data, drop us, otherwise
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* stick new segment in the proper place.
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*/
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if (p) {
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i = GETIP(p)->ip_off + GETIP(p)->ip_len - ip->ip_off;
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@ -796,6 +793,11 @@ ip_reass(m, fp, where)
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ip->ip_off += i;
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ip->ip_len -= i;
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}
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m->m_nextpkt = p->m_nextpkt;
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p->m_nextpkt = m;
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} else {
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m->m_nextpkt = fp->ipq_frags;
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fp->ipq_frags = m;
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}
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/*
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@ -803,7 +805,7 @@ ip_reass(m, fp, where)
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* if they are completely covered, dequeue them.
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*/
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for (; q != NULL && ip->ip_off + ip->ip_len > GETIP(q)->ip_off;
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p = q, q = nq) {
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q = nq) {
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i = (ip->ip_off + ip->ip_len) -
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GETIP(q)->ip_off;
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if (i < GETIP(q)->ip_len) {
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@ -813,14 +815,11 @@ ip_reass(m, fp, where)
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break;
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}
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nq = q->m_nextpkt;
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if (p)
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p->m_nextpkt = nq;
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else
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fp->ipq_frags = nq;
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m->m_nextpkt = nq;
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m_freem(q);
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}
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insert:
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inserted:
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#ifdef IPDIVERT
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/*
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@ -835,16 +834,8 @@ ip_reass(m, fp, where)
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#endif
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/*
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* Stick new segment in its place;
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* check for complete reassembly.
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* Check for complete reassembly.
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*/
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if (p == NULL) {
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m->m_nextpkt = fp->ipq_frags;
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fp->ipq_frags = m;
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} else {
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m->m_nextpkt = p->m_nextpkt;
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p->m_nextpkt = m;
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}
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next = 0;
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for (p = NULL, q = fp->ipq_frags; q; p = q, q = q->m_nextpkt) {
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if (GETIP(q)->ip_off != next)
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@ -1300,7 +1291,7 @@ ip_srcroute()
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*(mtod(m, struct in_addr *)) = *p--;
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#ifdef DIAGNOSTIC
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if (ipprintfs)
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printf(" hops %lx", ntohl(mtod(m, struct in_addr *)->s_addr));
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printf(" hops %lx", (u_long)ntohl(mtod(m, struct in_addr *)->s_addr));
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#endif
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/*
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@ -1320,7 +1311,7 @@ ip_srcroute()
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while (p >= ip_srcrt.route) {
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#ifdef DIAGNOSTIC
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if (ipprintfs)
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printf(" %lx", ntohl(q->s_addr));
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printf(" %lx", (u_long)ntohl(q->s_addr));
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#endif
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*q++ = *p--;
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}
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@ -1330,7 +1321,7 @@ ip_srcroute()
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*q = ip_srcrt.dst;
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#ifdef DIAGNOSTIC
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if (ipprintfs)
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printf(" %lx\n", ntohl(q->s_addr));
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printf(" %lx\n", (u_long)ntohl(q->s_addr));
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#endif
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return (m);
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}
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