/* * Copyright (c) 2000-2019 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1982, 1986, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)in_proto.c 8.2 (Berkeley) 2/9/95 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * TCP/IP protocol family: IP, ICMP, UDP, TCP. */ #if IPSEC #include #include #if IPSEC_ESP #include #endif #endif /* IPSEC */ static void in_dinit(struct domain *); static void ip_proto_input(protocol_family_t, mbuf_t); extern struct domain inetdomain_s; static struct pr_usrreqs nousrreqs; extern struct pr_usrreqs icmp_dgram_usrreqs; extern int icmp_dgram_ctloutput(struct socket *, struct sockopt *); struct domain *inetdomain = NULL; /* Thanks to PPP, this still needs to be exported */ lck_mtx_t *inet_domain_mutex; static struct protosw inetsw[] = { { .pr_type = 0, .pr_protocol = 0, .pr_init = ip_init, .pr_drain = ip_drain, .pr_usrreqs = &nousrreqs, }, { .pr_type = SOCK_DGRAM, .pr_protocol = IPPROTO_UDP, .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK | PR_PCBLOCK | PR_EVCONNINFO | PR_PRECONN_WRITE, .pr_input = udp_input, .pr_ctlinput = udp_ctlinput, .pr_ctloutput = udp_ctloutput, .pr_init = udp_init, .pr_usrreqs = &udp_usrreqs, .pr_lock = udp_lock, .pr_unlock = udp_unlock, .pr_getlock = udp_getlock, .pr_update_last_owner = inp_update_last_owner, .pr_copy_last_owner = inp_copy_last_owner, }, { .pr_type = SOCK_STREAM, .pr_protocol = IPPROTO_TCP, .pr_flags = PR_CONNREQUIRED | PR_WANTRCVD | PR_PCBLOCK | PR_PROTOLOCK | PR_DISPOSE | PR_EVCONNINFO | PR_PRECONN_WRITE | PR_DATA_IDEMPOTENT, .pr_input = tcp_input, .pr_ctlinput = tcp_ctlinput, .pr_ctloutput = tcp_ctloutput, .pr_init = tcp_init, .pr_drain = tcp_drain, .pr_usrreqs = &tcp_usrreqs, .pr_lock = tcp_lock, .pr_unlock = tcp_unlock, .pr_getlock = tcp_getlock, .pr_update_last_owner = inp_update_last_owner, .pr_copy_last_owner = inp_copy_last_owner, }, { .pr_type = SOCK_RAW, .pr_protocol = IPPROTO_RAW, .pr_flags = PR_ATOMIC | PR_ADDR, .pr_input = rip_input, .pr_ctlinput = rip_ctlinput, .pr_ctloutput = rip_ctloutput, .pr_usrreqs = &rip_usrreqs, .pr_unlock = rip_unlock, .pr_update_last_owner = inp_update_last_owner, .pr_copy_last_owner = inp_copy_last_owner, }, { .pr_type = SOCK_RAW, .pr_protocol = IPPROTO_ICMP, .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR, .pr_input = icmp_input, .pr_ctloutput = rip_ctloutput, .pr_usrreqs = &rip_usrreqs, .pr_unlock = rip_unlock, .pr_update_last_owner = inp_update_last_owner, .pr_copy_last_owner = inp_copy_last_owner, }, { .pr_type = SOCK_DGRAM, .pr_protocol = IPPROTO_ICMP, .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR, .pr_input = icmp_input, .pr_ctloutput = icmp_dgram_ctloutput, .pr_usrreqs = &icmp_dgram_usrreqs, .pr_unlock = rip_unlock, .pr_update_last_owner = inp_update_last_owner, .pr_copy_last_owner = inp_copy_last_owner, }, { .pr_type = SOCK_RAW, .pr_protocol = IPPROTO_IGMP, .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR, .pr_input = igmp_input, .pr_ctloutput = rip_ctloutput, .pr_init = igmp_init, .pr_usrreqs = &rip_usrreqs, .pr_unlock = rip_unlock, .pr_update_last_owner = inp_update_last_owner, .pr_copy_last_owner = inp_copy_last_owner, }, { .pr_type = SOCK_RAW, .pr_protocol = IPPROTO_GRE, .pr_flags = PR_ATOMIC | PR_ADDR, .pr_input = gre_input, .pr_ctlinput = rip_ctlinput, .pr_ctloutput = rip_ctloutput, .pr_usrreqs = &rip_usrreqs, .pr_unlock = rip_unlock, .pr_update_last_owner = inp_update_last_owner, .pr_copy_last_owner = inp_copy_last_owner, }, #if IPSEC { .pr_type = SOCK_RAW, .pr_protocol = IPPROTO_AH, .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK, .pr_input = ah4_input, .pr_usrreqs = &nousrreqs, }, #if IPSEC_ESP { .pr_type = SOCK_RAW, .pr_protocol = IPPROTO_ESP, .pr_flags = PR_ATOMIC | PR_ADDR | PR_PROTOLOCK, .pr_input = esp4_input, .pr_usrreqs = &nousrreqs, }, #endif /* IPSEC_ESP */ #endif /* IPSEC */ { .pr_type = SOCK_RAW, .pr_protocol = IPPROTO_IPV4, .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR, .pr_input = encap4_input, .pr_ctloutput = rip_ctloutput, .pr_usrreqs = &rip_usrreqs, .pr_unlock = rip_unlock, .pr_update_last_owner = inp_update_last_owner, .pr_copy_last_owner = inp_copy_last_owner, }, { .pr_type = SOCK_RAW, .pr_protocol = IPPROTO_IPV6, .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR, .pr_input = encap4_input, .pr_ctloutput = rip_ctloutput, .pr_usrreqs = &rip_usrreqs, .pr_unlock = rip_unlock, .pr_update_last_owner = inp_update_last_owner, .pr_copy_last_owner = inp_copy_last_owner, }, /* raw wildcard */ { .pr_type = SOCK_RAW, .pr_flags = PR_ATOMIC | PR_ADDR | PR_LASTHDR, .pr_input = rip_input, .pr_ctloutput = rip_ctloutput, .pr_init = rip_init, .pr_usrreqs = &rip_usrreqs, .pr_unlock = rip_unlock, .pr_update_last_owner = inp_update_last_owner, .pr_copy_last_owner = inp_copy_last_owner, }, }; static int in_proto_count = (sizeof(inetsw) / sizeof(struct protosw)); struct domain inetdomain_s = { .dom_family = PF_INET, .dom_flags = DOM_REENTRANT, .dom_name = "internet", .dom_init = in_dinit, .dom_rtattach = in_inithead, .dom_rtoffset = 32, .dom_maxrtkey = sizeof(struct sockaddr_in), .dom_protohdrlen = sizeof(struct tcpiphdr), }; /* Initialize the PF_INET domain, and add in the pre-defined protos */ void in_dinit(struct domain *dp) { struct protosw *pr; int i; domain_unguard_t unguard; VERIFY(!(dp->dom_flags & DOM_INITIALIZED)); VERIFY(inetdomain == NULL); inetdomain = dp; /* * Verify that the maximum possible tcp/ip header will still * fit in a small mbuf because m_pullup only puls into 256 * byte mbuf */ _CASSERT((sizeof(struct tcpiphdr) + TCP_MAXOLEN) <= _MHLEN); /* * Attach first, then initialize; ip_init() needs raw IP handler. */ for (i = 0, pr = &inetsw[0]; i < in_proto_count; i++, pr++) { net_add_proto(pr, dp, 0); } for (i = 0, pr = &inetsw[0]; i < in_proto_count; i++, pr++) { net_init_proto(pr, dp); } inet_domain_mutex = dp->dom_mtx; unguard = domain_unguard_deploy(); i = proto_register_input(PF_INET, ip_proto_input, NULL, 1); if (i != 0) { panic("%s: failed to register PF_INET protocol: %d", __func__, i); /* NOTREACHED */ } domain_unguard_release(unguard); } static void ip_proto_input(protocol_family_t protocol, mbuf_t packet_list) { #pragma unused(protocol) if (packet_list->m_nextpkt != NULL) { ip_input_process_list(packet_list); } else { /* * XXX remove this path if ip_input_process_list is proven * to be stable and has minimum overhead on most platforms. */ ip_input(packet_list); } } SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "Internet Family"); SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IP"); SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "ICMP"); SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "UDP"); SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "TCP"); SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IGMP"); #if IPSEC SYSCTL_NODE(_net_inet, IPPROTO_AH, ipsec, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "IPSEC"); #endif /* IPSEC */ SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW | CTLFLAG_LOCKED, 0, "RAW");