| tcp_input.c (206456) | tcp_input.c (207369) |
|---|---|
| 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 --- 16 unchanged lines hidden (view full) --- 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)tcp_input.c 8.12 (Berkeley) 5/24/95 30 */ 31 32#include <sys/cdefs.h> | 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 --- 16 unchanged lines hidden (view full) --- 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)tcp_input.c 8.12 (Berkeley) 5/24/95 30 */ 31 32#include <sys/cdefs.h> |
| 33__FBSDID("$FreeBSD: head/sys/netinet/tcp_input.c 206456 2010-04-10 12:47:06Z rpaulo $"); | 33__FBSDID("$FreeBSD: head/sys/netinet/tcp_input.c 207369 2010-04-29 11:52:42Z bz $"); |
| 34 35#include "opt_ipfw.h" /* for ipfw_fwd */ 36#include "opt_inet.h" 37#include "opt_inet6.h" 38#include "opt_ipsec.h" 39#include "opt_tcpdebug.h" 40 41#include <sys/param.h> --- 52 unchanged lines hidden (view full) --- 94 95#include <machine/in_cksum.h> 96 97#include <security/mac/mac_framework.h> 98 99static const int tcprexmtthresh = 3; 100 101VNET_DEFINE(struct tcpstat, tcpstat); | 34 35#include "opt_ipfw.h" /* for ipfw_fwd */ 36#include "opt_inet.h" 37#include "opt_inet6.h" 38#include "opt_ipsec.h" 39#include "opt_tcpdebug.h" 40 41#include <sys/param.h> --- 52 unchanged lines hidden (view full) --- 94 95#include <machine/in_cksum.h> 96 97#include <security/mac/mac_framework.h> 98 99static const int tcprexmtthresh = 3; 100 101VNET_DEFINE(struct tcpstat, tcpstat); |
| 102VNET_DEFINE(int, blackhole); 103VNET_DEFINE(int, tcp_delack_enabled); 104VNET_DEFINE(int, drop_synfin); 105VNET_DEFINE(int, tcp_do_rfc3042); 106VNET_DEFINE(int, tcp_do_rfc3390); 107VNET_DEFINE(int, tcp_do_ecn); 108VNET_DEFINE(int, tcp_ecn_maxretries); 109VNET_DEFINE(int, tcp_insecure_rst); 110VNET_DEFINE(int, tcp_do_autorcvbuf); 111VNET_DEFINE(int, tcp_autorcvbuf_inc); 112VNET_DEFINE(int, tcp_autorcvbuf_max); 113VNET_DEFINE(int, tcp_do_rfc3465); 114VNET_DEFINE(int, tcp_abc_l_var); 115 | |
| 116SYSCTL_VNET_STRUCT(_net_inet_tcp, TCPCTL_STATS, stats, CTLFLAG_RW, 117 &VNET_NAME(tcpstat), tcpstat, 118 "TCP statistics (struct tcpstat, netinet/tcp_var.h)"); 119 120int tcp_log_in_vain = 0; 121SYSCTL_INT(_net_inet_tcp, OID_AUTO, log_in_vain, CTLFLAG_RW, 122 &tcp_log_in_vain, 0, 123 "Log all incoming TCP segments to closed ports"); 124 | 102SYSCTL_VNET_STRUCT(_net_inet_tcp, TCPCTL_STATS, stats, CTLFLAG_RW, 103 &VNET_NAME(tcpstat), tcpstat, 104 "TCP statistics (struct tcpstat, netinet/tcp_var.h)"); 105 106int tcp_log_in_vain = 0; 107SYSCTL_INT(_net_inet_tcp, OID_AUTO, log_in_vain, CTLFLAG_RW, 108 &tcp_log_in_vain, 0, 109 "Log all incoming TCP segments to closed ports"); 110 |
| 111VNET_DEFINE(int, blackhole) = 0; 112#define V_blackhole VNET(blackhole) |
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| 125SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, blackhole, CTLFLAG_RW, 126 &VNET_NAME(blackhole), 0, 127 "Do not send RST on segments to closed ports"); 128 | 113SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, blackhole, CTLFLAG_RW, 114 &VNET_NAME(blackhole), 0, 115 "Do not send RST on segments to closed ports"); 116 |
| 117VNET_DEFINE(int, tcp_delack_enabled) = 1; |
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| 129SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, delayed_ack, CTLFLAG_RW, 130 &VNET_NAME(tcp_delack_enabled), 0, 131 "Delay ACK to try and piggyback it onto a data packet"); 132 | 118SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, delayed_ack, CTLFLAG_RW, 119 &VNET_NAME(tcp_delack_enabled), 0, 120 "Delay ACK to try and piggyback it onto a data packet"); 121 |
| 122VNET_DEFINE(int, drop_synfin) = 0; 123#define V_drop_synfin VNET(drop_synfin) |
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| 133SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, drop_synfin, CTLFLAG_RW, 134 &VNET_NAME(drop_synfin), 0, 135 "Drop TCP packets with SYN+FIN set"); 136 | 124SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, drop_synfin, CTLFLAG_RW, 125 &VNET_NAME(drop_synfin), 0, 126 "Drop TCP packets with SYN+FIN set"); 127 |
| 128VNET_DEFINE(int, tcp_do_rfc3042) = 1; 129#define V_tcp_do_rfc3042 VNET(tcp_do_rfc3042) |
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| 137SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, rfc3042, CTLFLAG_RW, 138 &VNET_NAME(tcp_do_rfc3042), 0, 139 "Enable RFC 3042 (Limited Transmit)"); 140 | 130SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, rfc3042, CTLFLAG_RW, 131 &VNET_NAME(tcp_do_rfc3042), 0, 132 "Enable RFC 3042 (Limited Transmit)"); 133 |
| 134VNET_DEFINE(int, tcp_do_rfc3390) = 1; 135#define V_tcp_do_rfc3390 VNET(tcp_do_rfc3390) |
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| 141SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, rfc3390, CTLFLAG_RW, 142 &VNET_NAME(tcp_do_rfc3390), 0, 143 "Enable RFC 3390 (Increasing TCP's Initial Congestion Window)"); 144 | 136SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, rfc3390, CTLFLAG_RW, 137 &VNET_NAME(tcp_do_rfc3390), 0, 138 "Enable RFC 3390 (Increasing TCP's Initial Congestion Window)"); 139 |
| 140VNET_DEFINE(int, tcp_do_rfc3465) = 1; 141#define V_tcp_do_rfc3465 VNET(tcp_do_rfc3465) |
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| 145SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, rfc3465, CTLFLAG_RW, 146 &VNET_NAME(tcp_do_rfc3465), 0, 147 "Enable RFC 3465 (Appropriate Byte Counting)"); 148 | 142SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, rfc3465, CTLFLAG_RW, 143 &VNET_NAME(tcp_do_rfc3465), 0, 144 "Enable RFC 3465 (Appropriate Byte Counting)"); 145 |
| 146VNET_DEFINE(int, tcp_abc_l_var) = 2; 147#define V_tcp_abc_l_var VNET(tcp_abc_l_var) |
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| 149SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, abc_l_var, CTLFLAG_RW, 150 &VNET_NAME(tcp_abc_l_var), 2, 151 "Cap the max cwnd increment during slow-start to this number of segments"); 152 153SYSCTL_NODE(_net_inet_tcp, OID_AUTO, ecn, CTLFLAG_RW, 0, "TCP ECN"); 154 | 148SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, abc_l_var, CTLFLAG_RW, 149 &VNET_NAME(tcp_abc_l_var), 2, 150 "Cap the max cwnd increment during slow-start to this number of segments"); 151 152SYSCTL_NODE(_net_inet_tcp, OID_AUTO, ecn, CTLFLAG_RW, 0, "TCP ECN"); 153 |
| 154VNET_DEFINE(int, tcp_do_ecn) = 0; |
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| 155SYSCTL_VNET_INT(_net_inet_tcp_ecn, OID_AUTO, enable, CTLFLAG_RW, 156 &VNET_NAME(tcp_do_ecn), 0, 157 "TCP ECN support"); 158 | 155SYSCTL_VNET_INT(_net_inet_tcp_ecn, OID_AUTO, enable, CTLFLAG_RW, 156 &VNET_NAME(tcp_do_ecn), 0, 157 "TCP ECN support"); 158 |
| 159VNET_DEFINE(int, tcp_ecn_maxretries) = 1; |
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| 159SYSCTL_VNET_INT(_net_inet_tcp_ecn, OID_AUTO, maxretries, CTLFLAG_RW, 160 &VNET_NAME(tcp_ecn_maxretries), 0, 161 "Max retries before giving up on ECN"); 162 | 160SYSCTL_VNET_INT(_net_inet_tcp_ecn, OID_AUTO, maxretries, CTLFLAG_RW, 161 &VNET_NAME(tcp_ecn_maxretries), 0, 162 "Max retries before giving up on ECN"); 163 |
| 164VNET_DEFINE(int, tcp_insecure_rst) = 0; 165#define V_tcp_insecure_rst VNET(tcp_insecure_rst) |
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| 163SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, insecure_rst, CTLFLAG_RW, 164 &VNET_NAME(tcp_insecure_rst), 0, 165 "Follow the old (insecure) criteria for accepting RST packets"); 166 | 166SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, insecure_rst, CTLFLAG_RW, 167 &VNET_NAME(tcp_insecure_rst), 0, 168 "Follow the old (insecure) criteria for accepting RST packets"); 169 |
| 170VNET_DEFINE(int, tcp_do_autorcvbuf) = 1; 171#define V_tcp_do_autorcvbuf VNET(tcp_do_autorcvbuf) |
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| 167SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, recvbuf_auto, CTLFLAG_RW, 168 &VNET_NAME(tcp_do_autorcvbuf), 0, 169 "Enable automatic receive buffer sizing"); 170 | 172SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, recvbuf_auto, CTLFLAG_RW, 173 &VNET_NAME(tcp_do_autorcvbuf), 0, 174 "Enable automatic receive buffer sizing"); 175 |
| 176VNET_DEFINE(int, tcp_autorcvbuf_inc) = 16*1024; 177#define V_tcp_autorcvbuf_inc VNET(tcp_autorcvbuf_inc) |
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| 171SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, recvbuf_inc, CTLFLAG_RW, 172 &VNET_NAME(tcp_autorcvbuf_inc), 0, 173 "Incrementor step size of automatic receive buffer"); 174 | 178SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, recvbuf_inc, CTLFLAG_RW, 179 &VNET_NAME(tcp_autorcvbuf_inc), 0, 180 "Incrementor step size of automatic receive buffer"); 181 |
| 182VNET_DEFINE(int, tcp_autorcvbuf_max) = 256*1024; 183#define V_tcp_autorcvbuf_max VNET(tcp_autorcvbuf_max) |
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| 175SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, recvbuf_max, CTLFLAG_RW, 176 &VNET_NAME(tcp_autorcvbuf_max), 0, 177 "Max size of automatic receive buffer"); 178 179int tcp_read_locking = 1; 180SYSCTL_INT(_net_inet_tcp, OID_AUTO, read_locking, CTLFLAG_RW, 181 &tcp_read_locking, 0, "Enable read locking strategy"); 182 183VNET_DEFINE(struct inpcbhead, tcb); | 184SYSCTL_VNET_INT(_net_inet_tcp, OID_AUTO, recvbuf_max, CTLFLAG_RW, 185 &VNET_NAME(tcp_autorcvbuf_max), 0, 186 "Max size of automatic receive buffer"); 187 188int tcp_read_locking = 1; 189SYSCTL_INT(_net_inet_tcp, OID_AUTO, read_locking, CTLFLAG_RW, 190 &tcp_read_locking, 0, "Enable read locking strategy"); 191 192VNET_DEFINE(struct inpcbhead, tcb); |
| 184VNET_DEFINE(struct inpcbinfo, tcbinfo); | |
| 185#define tcb6 tcb /* for KAME src sync over BSD*'s */ | 193#define tcb6 tcb /* for KAME src sync over BSD*'s */ |
| 194VNET_DEFINE(struct inpcbinfo, tcbinfo); |
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| 186 187static void tcp_dooptions(struct tcpopt *, u_char *, int, int); 188static void tcp_do_segment(struct mbuf *, struct tcphdr *, 189 struct socket *, struct tcpcb *, int, int, uint8_t, 190 int); 191static void tcp_dropwithreset(struct mbuf *, struct tcphdr *, 192 struct tcpcb *, int, int); 193static void tcp_pulloutofband(struct socket *, --- 3245 unchanged lines hidden --- | 195 196static void tcp_dooptions(struct tcpopt *, u_char *, int, int); 197static void tcp_do_segment(struct mbuf *, struct tcphdr *, 198 struct socket *, struct tcpcb *, int, int, uint8_t, 199 int); 200static void tcp_dropwithreset(struct mbuf *, struct tcphdr *, 201 struct tcpcb *, int, int); 202static void tcp_pulloutofband(struct socket *, --- 3245 unchanged lines hidden --- |