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Annotation of XNU/bsd/netinet/in_proto.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * Copyright (c) 1982, 1986, 1993
        !            24:  *     The Regents of the University of California.  All rights reserved.
        !            25:  *
        !            26:  * Redistribution and use in source and binary forms, with or without
        !            27:  * modification, are permitted provided that the following conditions
        !            28:  * are met:
        !            29:  * 1. Redistributions of source code must retain the above copyright
        !            30:  *    notice, this list of conditions and the following disclaimer.
        !            31:  * 2. Redistributions in binary form must reproduce the above copyright
        !            32:  *    notice, this list of conditions and the following disclaimer in the
        !            33:  *    documentation and/or other materials provided with the distribution.
        !            34:  * 3. All advertising materials mentioning features or use of this software
        !            35:  *    must display the following acknowledgement:
        !            36:  *     This product includes software developed by the University of
        !            37:  *     California, Berkeley and its contributors.
        !            38:  * 4. Neither the name of the University nor the names of its contributors
        !            39:  *    may be used to endorse or promote products derived from this software
        !            40:  *    without specific prior written permission.
        !            41:  *
        !            42:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            43:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            44:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            45:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            46:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            47:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            48:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            49:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            50:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            51:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            52:  * SUCH DAMAGE.
        !            53:  *
        !            54:  *     @(#)in_proto.c  8.2 (Berkeley) 2/9/95
        !            55:  */
        !            56: 
        !            57: #if ISFB31
        !            58: #include "opt_ipdivert.h"
        !            59: #include "opt_ipx.h"
        !            60: #endif
        !            61: 
        !            62: #include <sys/param.h>
        !            63: #include <sys/kernel.h>
        !            64: #include <sys/socket.h>
        !            65: #include <sys/domain.h>
        !            66: #include <sys/protosw.h>
        !            67: 
        !            68: 
        !            69: #include <sys/sysctl.h>
        !            70: 
        !            71: 
        !            72: #include <net/if.h>
        !            73: #include <net/route.h>
        !            74: 
        !            75: #include <netinet/in.h>
        !            76: #include <netinet/in_systm.h>
        !            77: #include <netinet/ip.h>
        !            78: #include <netinet/ip_var.h>
        !            79: #include <netinet/ip_icmp.h>
        !            80: #include <netinet/igmp_var.h>
        !            81: #include <netinet/tcp.h>
        !            82: #include <netinet/tcp_timer.h>
        !            83: #include <netinet/tcp_var.h>
        !            84: #include <netinet/tcpip.h>
        !            85: #include <netinet/udp.h>
        !            86: #include <netinet/udp_var.h>
        !            87: /*
        !            88:  * TCP/IP protocol family: IP, ICMP, UDP, TCP.
        !            89:  */
        !            90: 
        !            91: #if IPXIP
        !            92: #include <netipx/ipx_ip.h>
        !            93: #endif
        !            94: 
        !            95: #if NSIP
        !            96: #include <netns/ns.h>
        !            97: #include <netns/ns_if.h>
        !            98: #endif
        !            99: 
        !           100: extern struct domain inetdomain;
        !           101: static struct pr_usrreqs nousrreqs;
        !           102: 
        !           103: struct protosw inetsw[] = {
        !           104: { 0,           &inetdomain,    0,              0,
        !           105:   0,           0,              0,              0,
        !           106:   0,
        !           107:   ip_init,     0,              ip_slowtimo,    ip_drain,
        !           108:   0,           &nousrreqs      
        !           109: },
        !           110: { SOCK_DGRAM,  &inetdomain,    IPPROTO_UDP,    PR_ATOMIC|PR_ADDR,
        !           111:   udp_input,   0,              udp_ctlinput,   ip_ctloutput,
        !           112:   0,
        !           113:   udp_init,    0,              0,              0,
        !           114:   0, &udp_usrreqs
        !           115: },
        !           116: { SOCK_STREAM, &inetdomain,    IPPROTO_TCP,
        !           117:        PR_CONNREQUIRED|PR_IMPLOPCL|PR_WANTRCVD,
        !           118:   tcp_input,   0,              tcp_ctlinput,   tcp_ctloutput,
        !           119:   0,
        !           120:   tcp_init,    tcp_fasttimo,   tcp_slowtimo,   tcp_drain,
        !           121:   0, &tcp_usrreqs
        !           122: },
        !           123: { SOCK_RAW,    &inetdomain,    IPPROTO_RAW,    PR_ATOMIC|PR_ADDR,
        !           124:   rip_input,   0,              rip_ctlinput,   rip_ctloutput,
        !           125:   0,
        !           126:   0,           0,              0,              0,
        !           127:   0, &rip_usrreqs
        !           128: },
        !           129: { SOCK_RAW,    &inetdomain,    IPPROTO_ICMP,   PR_ATOMIC|PR_ADDR,
        !           130:   icmp_input,  0,              0,              rip_ctloutput,
        !           131:   0,
        !           132:   0,           0,              0,              0,
        !           133:   0, &rip_usrreqs
        !           134: },
        !           135: { SOCK_RAW,    &inetdomain,    IPPROTO_IGMP,   PR_ATOMIC|PR_ADDR,
        !           136:   igmp_input,  0,              0,              rip_ctloutput,
        !           137:   0,
        !           138:   igmp_init,   igmp_fasttimo,  igmp_slowtimo,  0,
        !           139:   0, &rip_usrreqs
        !           140: },
        !           141: { SOCK_RAW,    &inetdomain,    IPPROTO_RSVP,   PR_ATOMIC|PR_ADDR,
        !           142:   rsvp_input,  0,              0,              rip_ctloutput,
        !           143:   0,
        !           144:   0,           0,              0,              0,
        !           145:   0, &rip_usrreqs
        !           146: },
        !           147: { SOCK_RAW,    &inetdomain,    IPPROTO_IPIP,   PR_ATOMIC|PR_ADDR,
        !           148:   ipip_input,  0,              0,              rip_ctloutput,
        !           149:   0,
        !           150:   0,           0,              0,              0,
        !           151:   0, &rip_usrreqs
        !           152: },
        !           153: #if IPDIVERT
        !           154: { SOCK_RAW,    &inetdomain,    IPPROTO_DIVERT, PR_ATOMIC|PR_ADDR,
        !           155:   div_input,   0,              0,              ip_ctloutput,
        !           156:   0,
        !           157:   div_init,    0,              0,              0,
        !           158:   0, &div_usrreqs,
        !           159: },
        !           160: #endif
        !           161: #if TPIP
        !           162: { SOCK_SEQPACKET,&inetdomain,  IPPROTO_TP,     PR_CONNREQUIRED|PR_WANTRCVD,
        !           163:   tpip_input,  0,              tpip_ctlinput,  tp_ctloutput,
        !           164:   0, tp_usrreq,
        !           165:   tp_init,     0,              tp_slowtimo,    tp_drain,
        !           166: },
        !           167: #endif
        !           168: /* EON (ISO CLNL over IP) */
        !           169: #if EON
        !           170: { SOCK_RAW,    &inetdomain,    IPPROTO_EON,    0,
        !           171:   eoninput,    0,              eonctlinput,            0,
        !           172:   0,
        !           173:   eonprotoinit,        0,              0,              0,
        !           174: },
        !           175: #endif
        !           176: #if IPXIP
        !           177: { SOCK_RAW,    &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR,
        !           178:   ipxip_input, 0,              ipxip_ctlinput, 0,
        !           179:   0,
        !           180:   0,           0,              0,              0,
        !           181:   0, &rip_usrreqs
        !           182: },
        !           183: #endif
        !           184: #if NSIP
        !           185: { SOCK_RAW,    &inetdomain,    IPPROTO_IDP,    PR_ATOMIC|PR_ADDR,
        !           186:   idpip_input, 0,              nsip_ctlinput,  0,
        !           187:   0,
        !           188:   0,           0,              0,              0,
        !           189:   0, &rip_usrreqs
        !           190: },
        !           191: #endif
        !           192:        /* raw wildcard */
        !           193: { SOCK_RAW,    &inetdomain,    0,              PR_ATOMIC|PR_ADDR,
        !           194:   rip_input,   0,              0,              rip_ctloutput,
        !           195:   0,
        !           196:   rip_init,    0,              0,              0,
        !           197:   0, &rip_usrreqs
        !           198: },
        !           199: };
        !           200: 
        !           201: extern int in_inithead __P((void **, int));
        !           202: 
        !           203: int in_proto_count = (sizeof (inetsw) / sizeof (struct protosw));
        !           204: 
        !           205: extern void in_dinit(void);
        !           206: /* A routing init function, and a header size */
        !           207: struct domain inetdomain =
        !           208:     { AF_INET, "internet", in_dinit, 0, 0, 
        !           209:       inetsw, 0,
        !           210:       in_inithead, 32, sizeof(struct sockaddr_in),
        !           211:       sizeof(struct tcpiphdr), 0
        !           212:     };
        !           213: 
        !           214: DOMAIN_SET(inet);
        !           215: 
        !           216: 
        !           217: SYSCTL_NODE(_net,      PF_INET,                inet,   CTLFLAG_RW, 0,
        !           218:        "Internet Family");
        !           219: 
        !           220: SYSCTL_NODE(_net_inet, IPPROTO_IP,     ip,     CTLFLAG_RW, 0,  "IP");
        !           221: SYSCTL_NODE(_net_inet, IPPROTO_ICMP,   icmp,   CTLFLAG_RW, 0,  "ICMP");
        !           222: SYSCTL_NODE(_net_inet, IPPROTO_UDP,    udp,    CTLFLAG_RW, 0,  "UDP");
        !           223: SYSCTL_NODE(_net_inet, IPPROTO_TCP,    tcp,    CTLFLAG_RW, 0,  "TCP");
        !           224: SYSCTL_NODE(_net_inet, IPPROTO_IGMP,   igmp,   CTLFLAG_RW, 0,  "IGMP");
        !           225: SYSCTL_NODE(_net_inet, IPPROTO_RAW,    raw,    CTLFLAG_RW, 0,  "RAW");
        !           226: #if IPDIVERT
        !           227: SYSCTL_NODE(_net_inet, IPPROTO_DIVERT, div,    CTLFLAG_RW, 0,  "DIVERT");
        !           228: #endif
        !           229: 

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