mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-12-03 23:28:57 +00:00
All three files: make COMPAT_IPFW==0 case work again.
ip_input.c: - delete some dusty code - _IP_VHL - use fast inline header checksum when possible
This commit is contained in:
Garrett Wollman
parent
011acecf50
commit
5893891624
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=18797
@ -31,9 +31,12 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)ip_input.c 8.2 (Berkeley) 1/4/94
|
||||
* $Id: ip_input.c,v 1.46 1996/08/21 21:37:00 sos Exp $
|
||||
* $Id: ip_input.c,v 1.47 1996/09/08 13:45:49 davidg Exp $
|
||||
* $ANA: ip_input.c,v 1.5 1996/09/18 14:34:59 wollman Exp $
|
||||
*/
|
||||
|
||||
#define _IP_VHL
|
||||
|
||||
#include "opt_ipfw.h"
|
||||
|
||||
#include <sys/param.h>
|
||||
@ -61,6 +64,7 @@
|
||||
#include <netinet/in_var.h>
|
||||
#include <netinet/ip_var.h>
|
||||
#include <netinet/ip_icmp.h>
|
||||
#include <machine/in_cksum.h>
|
||||
|
||||
#include <sys/socketvar.h>
|
||||
|
||||
@ -110,6 +114,14 @@ SYSCTL_INT(_net_inet_ip, IPCTL_DEFMTU, mtu, CTLFLAG_RW,
|
||||
&ip_mtu, 0, "");
|
||||
#endif
|
||||
|
||||
#if !defined(COMPAT_IPFW) || COMPAT_IPFW == 1
|
||||
#undef COMPAT_IPFW
|
||||
#define COMPAT_IPFW 1
|
||||
#else
|
||||
#undef COMPAT_IPFW
|
||||
#endif
|
||||
|
||||
#ifdef COMPAT_IPFW
|
||||
/* Firewall hooks */
|
||||
ip_fw_chk_t *ip_fw_chk_ptr;
|
||||
ip_fw_ctl_t *ip_fw_ctl_ptr;
|
||||
@ -117,6 +129,7 @@ ip_fw_ctl_t *ip_fw_ctl_ptr;
|
||||
/* IP Network Address Translation (NAT) hooks */
|
||||
ip_nat_t *ip_nat_ptr;
|
||||
ip_nat_ctl_t *ip_nat_ctl_ptr;
|
||||
#endif
|
||||
|
||||
/*
|
||||
* We need to save the IP options in case a protocol wants to respond
|
||||
@ -152,7 +165,7 @@ static struct ip *
|
||||
ip_reass __P((struct ipasfrag *, struct ipq *));
|
||||
static struct in_ifaddr *
|
||||
ip_rtaddr __P((struct in_addr));
|
||||
static void ipintr __P((void));
|
||||
static void ipintr __P((void));
|
||||
/*
|
||||
* IP initialization: fill in IP protocol switch table.
|
||||
* All protocols not implemented in kernel go to raw IP protocol handler.
|
||||
@ -202,7 +215,7 @@ ip_input(struct mbuf *m)
|
||||
|
||||
#ifdef DIAGNOSTIC
|
||||
if ((m->m_flags & M_PKTHDR) == 0)
|
||||
panic("ipintr no HDR");
|
||||
panic("ip_input no HDR");
|
||||
#endif
|
||||
/*
|
||||
* If no IP addresses have been set yet but the interfaces
|
||||
@ -211,17 +224,28 @@ ip_input(struct mbuf *m)
|
||||
if (in_ifaddr == NULL)
|
||||
goto bad;
|
||||
ipstat.ips_total++;
|
||||
|
||||
if (m->m_pkthdr.len < sizeof(struct ip))
|
||||
goto tooshort;
|
||||
|
||||
#ifdef DIAGNOSTIC
|
||||
if (m->m_len < sizeof(struct ip))
|
||||
panic("ipintr mbuf too short");
|
||||
#endif
|
||||
|
||||
if (m->m_len < sizeof (struct ip) &&
|
||||
(m = m_pullup(m, sizeof (struct ip))) == 0) {
|
||||
ipstat.ips_toosmall++;
|
||||
return;
|
||||
}
|
||||
ip = mtod(m, struct ip *);
|
||||
if (ip->ip_v != IPVERSION) {
|
||||
|
||||
if (IP_VHL_V(ip->ip_vhl) != IPVERSION) {
|
||||
ipstat.ips_badvers++;
|
||||
goto bad;
|
||||
}
|
||||
hlen = ip->ip_hl << 2;
|
||||
|
||||
hlen = IP_VHL_HL(ip->ip_vhl) << 2;
|
||||
if (hlen < sizeof(struct ip)) { /* minimum header length */
|
||||
ipstat.ips_badhlen++;
|
||||
goto bad;
|
||||
@ -233,7 +257,11 @@ ip_input(struct mbuf *m)
|
||||
}
|
||||
ip = mtod(m, struct ip *);
|
||||
}
|
||||
ip->ip_sum = in_cksum(m, hlen);
|
||||
if (hlen == sizeof(struct ip)) {
|
||||
ip->ip_sum = in_cksum_hdr(ip);
|
||||
} else {
|
||||
ip->ip_sum = in_cksum(m, hlen);
|
||||
}
|
||||
if (ip->ip_sum) {
|
||||
ipstat.ips_badsum++;
|
||||
goto bad;
|
||||
@ -257,6 +285,7 @@ ip_input(struct mbuf *m)
|
||||
* Drop packet if shorter than we expect.
|
||||
*/
|
||||
if (m->m_pkthdr.len < ip->ip_len) {
|
||||
tooshort:
|
||||
ipstat.ips_tooshort++;
|
||||
goto bad;
|
||||
}
|
||||
@ -278,6 +307,7 @@ ip_input(struct mbuf *m)
|
||||
* - Encapsulate: put it in another IP and send out. <unimp.>
|
||||
*/
|
||||
|
||||
#ifdef COMPAT_IPFW
|
||||
if (ip_fw_chk_ptr) {
|
||||
int action;
|
||||
|
||||
@ -301,6 +331,7 @@ ip_input(struct mbuf *m)
|
||||
|
||||
if (ip_nat_ptr && !(*ip_nat_ptr)(&ip, &m, IP_NAT_IN))
|
||||
return;
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Process options and, if not destined for us,
|
||||
@ -330,26 +361,11 @@ ip_input(struct mbuf *m)
|
||||
if (IA_SIN(ia)->sin_addr.s_addr == ip->ip_dst.s_addr)
|
||||
goto ours;
|
||||
if (ia->ia_ifp && ia->ia_ifp->if_flags & IFF_BROADCAST) {
|
||||
#if 0
|
||||
u_long t;
|
||||
#endif
|
||||
|
||||
if (satosin(&ia->ia_broadaddr)->sin_addr.s_addr ==
|
||||
ip->ip_dst.s_addr)
|
||||
goto ours;
|
||||
if (ip->ip_dst.s_addr == ia->ia_netbroadcast.s_addr)
|
||||
goto ours;
|
||||
#if 0 /* XXX - this should go away */
|
||||
/*
|
||||
* Look for all-0's host part (old broadcast addr),
|
||||
* either for subnet or net.
|
||||
*/
|
||||
t = ntohl(ip->ip_dst.s_addr);
|
||||
if (t == ia->ia_subnet)
|
||||
goto ours;
|
||||
if (t == ia->ia_net)
|
||||
goto ours;
|
||||
#endif /* compatibility cruft */
|
||||
}
|
||||
}
|
||||
if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
|
||||
@ -515,7 +531,7 @@ ipintr(void)
|
||||
}
|
||||
|
||||
NETISR_SET(NETISR_IP, ipintr);
|
||||
|
||||
|
||||
/*
|
||||
* Take incoming datagram fragment and try to
|
||||
* reassemble it into whole datagram. If a chain for
|
||||
@ -790,7 +806,7 @@ ip_dooptions(m)
|
||||
|
||||
dst = ip->ip_dst;
|
||||
cp = (u_char *)(ip + 1);
|
||||
cnt = (ip->ip_hl << 2) - sizeof (struct ip);
|
||||
cnt = (IP_VHL_HL(ip->ip_vhl) << 2) - sizeof (struct ip);
|
||||
for (; cnt > 0; cnt -= optlen, cp += optlen) {
|
||||
opt = cp[IPOPT_OPTVAL];
|
||||
if (opt == IPOPT_EOL)
|
||||
@ -972,7 +988,7 @@ ip_dooptions(m)
|
||||
}
|
||||
return (0);
|
||||
bad:
|
||||
ip->ip_len -= ip->ip_hl << 2; /* XXX icmp_error adds in hdr length */
|
||||
ip->ip_len -= IP_VHL_HL(ip->ip_vhl) << 2; /* XXX icmp_error adds in hdr length */
|
||||
icmp_error(m, type, code, 0, 0);
|
||||
ipstat.ips_badoptions++;
|
||||
return (1);
|
||||
@ -1115,14 +1131,14 @@ ip_stripoptions(m, mopt)
|
||||
register caddr_t opts;
|
||||
int olen;
|
||||
|
||||
olen = (ip->ip_hl<<2) - sizeof (struct ip);
|
||||
olen = (IP_VHL_HL(ip->ip_vhl) << 2) - sizeof (struct ip);
|
||||
opts = (caddr_t)(ip + 1);
|
||||
i = m->m_len - (sizeof (struct ip) + olen);
|
||||
bcopy(opts + olen, opts, (unsigned)i);
|
||||
m->m_len -= olen;
|
||||
if (m->m_flags & M_PKTHDR)
|
||||
m->m_pkthdr.len -= olen;
|
||||
ip->ip_hl = sizeof(struct ip) >> 2;
|
||||
ip->ip_vhl = IP_MAKE_VHL(IPVERSION, sizeof(struct ip) >> 2);
|
||||
}
|
||||
|
||||
u_char inetctlerrmap[PRC_NCMDS] = {
|
||||
|
||||
@ -31,7 +31,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)ip_output.c 8.3 (Berkeley) 1/21/94
|
||||
* $Id: ip_output.c,v 1.41 1996/07/10 19:44:26 julian Exp $
|
||||
* $Id: ip_output.c,v 1.42 1996/08/21 21:37:04 sos Exp $
|
||||
*/
|
||||
|
||||
#define _IP_VHL
|
||||
@ -339,12 +339,12 @@ sendit:
|
||||
* - Encapsulate: put it in another IP and send out. <unimp.>
|
||||
*/
|
||||
|
||||
#ifdef COMPAT_IPFW
|
||||
if (ip_nat_ptr && !(*ip_nat_ptr)(&ip, &m, IP_NAT_OUT)) {
|
||||
error = EACCES;
|
||||
goto done;
|
||||
}
|
||||
|
||||
#ifdef COMPAT_IPFW
|
||||
/*
|
||||
* Check with the firewall...
|
||||
*/
|
||||
|
||||
@ -31,7 +31,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* @(#)raw_ip.c 8.7 (Berkeley) 5/15/95
|
||||
* $Id: raw_ip.c,v 1.34 1996/08/21 21:37:07 sos Exp $
|
||||
* $Id: raw_ip.c,v 1.35 1996/08/27 20:52:27 sos Exp $
|
||||
*/
|
||||
|
||||
#include <sys/param.h>
|
||||
@ -250,7 +250,6 @@ rip_ctloutput(op, so, level, optname, m)
|
||||
return(EINVAL);
|
||||
}
|
||||
return (*ip_fw_ctl_ptr)(optname, m);
|
||||
#endif
|
||||
|
||||
case IP_NAT:
|
||||
if (ip_nat_ctl_ptr == NULL) {
|
||||
@ -259,6 +258,7 @@ rip_ctloutput(op, so, level, optname, m)
|
||||
}
|
||||
return (*ip_nat_ctl_ptr)(op, m);
|
||||
|
||||
#endif
|
||||
case IP_RSVP_ON:
|
||||
return ip_rsvp_init(so);
|
||||
break;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user