| tcp_input.c (57904) | tcp_input.c (58698) |
|---|---|
| 1/* 2 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1994, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)tcp_input.c 8.12 (Berkeley) 5/24/95 | 1/* 2 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1994, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)tcp_input.c 8.12 (Berkeley) 5/24/95 |
| 34 * $FreeBSD: head/sys/netinet/tcp_input.c 57903 2000-03-11 11:17:24Z shin $ | 34 * $FreeBSD: head/sys/netinet/tcp_input.c 58698 2000-03-27 19:14:27Z jlemon $ |
| 35 */ 36 37#include "opt_ipfw.h" /* for ipfw_fwd */ 38#include "opt_inet6.h" 39#include "opt_ipsec.h" 40#include "opt_tcpdebug.h" 41#include "opt_tcp_input.h" 42 --- 52 unchanged lines hidden (view full) --- 95#ifdef IPSEC 96#include <netinet6/ipsec.h> 97#ifdef INET6 98#include <netinet6/ipsec6.h> 99#endif 100#include <netkey/key.h> 101#endif /*IPSEC*/ 102 | 35 */ 36 37#include "opt_ipfw.h" /* for ipfw_fwd */ 38#include "opt_inet6.h" 39#include "opt_ipsec.h" 40#include "opt_tcpdebug.h" 41#include "opt_tcp_input.h" 42 --- 52 unchanged lines hidden (view full) --- 95#ifdef IPSEC 96#include <netinet6/ipsec.h> 97#ifdef INET6 98#include <netinet6/ipsec6.h> 99#endif 100#include <netkey/key.h> 101#endif /*IPSEC*/ 102 |
| 103#include <machine/in_cksum.h> 104 |
|
| 103MALLOC_DEFINE(M_TSEGQ, "tseg_qent", "TCP segment queue entry"); 104 105static int tcprexmtthresh = 3; 106tcp_seq tcp_iss; 107tcp_cc tcp_ccgen; 108 109struct tcpstat tcpstat; 110SYSCTL_STRUCT(_net_inet_tcp, TCPCTL_STATS, stats, CTLFLAG_RD, --- 309 unchanged lines hidden (view full) --- 420 if (m->m_len < sizeof (struct tcpiphdr)) { 421 if ((m = m_pullup(m, sizeof (struct tcpiphdr))) == 0) { 422 tcpstat.tcps_rcvshort++; 423 return; 424 } 425 } 426 ip = mtod(m, struct ip *); 427 ipov = (struct ipovly *)ip; | 105MALLOC_DEFINE(M_TSEGQ, "tseg_qent", "TCP segment queue entry"); 106 107static int tcprexmtthresh = 3; 108tcp_seq tcp_iss; 109tcp_cc tcp_ccgen; 110 111struct tcpstat tcpstat; 112SYSCTL_STRUCT(_net_inet_tcp, TCPCTL_STATS, stats, CTLFLAG_RD, --- 309 unchanged lines hidden (view full) --- 422 if (m->m_len < sizeof (struct tcpiphdr)) { 423 if ((m = m_pullup(m, sizeof (struct tcpiphdr))) == 0) { 424 tcpstat.tcps_rcvshort++; 425 return; 426 } 427 } 428 ip = mtod(m, struct ip *); 429 ipov = (struct ipovly *)ip; |
| 428 429 /* 430 * Checksum extended TCP header and data. 431 */ 432 tlen = ip->ip_len; 433 len = sizeof (struct ip) + tlen; 434 bzero(ipov->ih_x1, sizeof(ipov->ih_x1)); 435 ipov->ih_len = (u_short)tlen; 436 HTONS(ipov->ih_len); | |
| 437 th = (struct tcphdr *)((caddr_t)ip + off0); | 430 th = (struct tcphdr *)((caddr_t)ip + off0); |
| 438 th->th_sum = in_cksum(m, len); | 431 tlen = ip->ip_len; 432 433 if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { 434 if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) 435 th->th_sum = m->m_pkthdr.csum_data; 436 else 437 th->th_sum = in_pseudo(ip->ip_src.s_addr, 438 ip->ip_dst.s_addr, htonl(m->m_pkthdr.csum_data + 439 ip->ip_len + IPPROTO_TCP)); 440 th->th_sum ^= 0xffff; 441 } else { 442 /* 443 * Checksum extended TCP header and data. 444 */ 445 len = sizeof (struct ip) + tlen; 446 bzero(ipov->ih_x1, sizeof(ipov->ih_x1)); 447 ipov->ih_len = (u_short)tlen; 448 HTONS(ipov->ih_len); 449 th->th_sum = in_cksum(m, len); 450 } |
| 439 if (th->th_sum) { 440 tcpstat.tcps_rcvbadsum++; 441 goto drop; 442 } 443#ifdef INET6 444 /* Re-initialization for later version check */ 445 ip->ip_v = IPVERSION; 446#endif --- 2336 unchanged lines hidden --- | 451 if (th->th_sum) { 452 tcpstat.tcps_rcvbadsum++; 453 goto drop; 454 } 455#ifdef INET6 456 /* Re-initialization for later version check */ 457 ip->ip_v = IPVERSION; 458#endif --- 2336 unchanged lines hidden --- |