61f7427f02
Since 4.4BSD the protosw was used to implement socket types created by socket(2) syscall and at the same to demultiplex incoming IPv4 datagrams (later copied to IPv6). This story ended with78b1fc05b2. These entries (e.g. IPPROTO_ICMP) in inetsw that were added to catch packets in ip_input(), they would also be returned by pffindproto() if user says socket(AF_INET, SOCK_RAW, IPPROTO_ICMP). Thus, for raw sockets to work correctly, all the entries were pointing at raw_usrreq differentiating only in the value of pr_protocol. With78b1fc05b2all these entries are no longer needed, as ip_protox is independent of protosw. Any socket syscall requesting SOCK_RAW type would end up with rip_protosw. And this protosw has its pr_protocol set to 0, allowing to mark socket with any protocol. For IPv6 raw socket the change required two small fixes: o Validate user provided protocol value o Always use protocol number stored in inp in rip6_attach, instead of protosw value, which is now always 0. Differential revision: https://reviews.freebsd.org/D36380
166 lines
5.2 KiB
C
166 lines
5.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)in_proto.c 8.2 (Berkeley) 2/9/95
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_mrouting.h"
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#include "opt_ipsec.h"
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_sctp.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/socket.h>
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#include <sys/domain.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/queue.h>
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#include <sys/sysctl.h>
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/*
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* While this file provides the domain and protocol switch tables for IPv4, it
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* also provides the sysctl node declarations for net.inet.* often shared with
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* IPv6 for common features or by upper layer protocols. In case of no IPv4
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* support compile out everything but these sysctl nodes.
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*/
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#ifdef INET
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/route.h>
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#include <net/vnet.h>
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#endif /* INET */
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#if defined(INET) || defined(INET6)
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#include <netinet/in.h>
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#endif
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#ifdef INET
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#include <netinet/in_systm.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/igmp_var.h>
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#include <netinet/tcp.h>
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#include <netinet/tcp_timer.h>
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#include <netinet/tcp_var.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#include <netinet/ip_encap.h>
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/*
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* TCP/IP protocol family: IP, ICMP, UDP, TCP.
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*/
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#ifdef SCTP
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#include <netinet/in_pcb.h>
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#include <netinet/sctp_pcb.h>
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#include <netinet/sctp.h>
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#include <netinet/sctp_var.h>
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#endif
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/* netinet/raw_ip.c */
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extern struct protosw rip_protosw;
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/* netinet/udp_usrreq.c */
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extern struct protosw udp_protosw, udplite_protosw;
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FEATURE(inet, "Internet Protocol version 4");
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struct domain inetdomain = {
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.dom_family = AF_INET,
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.dom_name = "internet",
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.dom_rtattach = in_inithead,
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#ifdef VIMAGE
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.dom_rtdetach = in_detachhead,
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#endif
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.dom_ifattach = in_domifattach,
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.dom_ifdetach = in_domifdetach,
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.dom_nprotosw = 14,
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.dom_protosw = {
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&tcp_protosw,
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&udp_protosw,
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#ifdef SCTP
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&sctp_seqpacket_protosw,
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&sctp_stream_protosw,
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#else
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NULL, NULL,
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#endif
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&udplite_protosw,
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&rip_protosw,
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/* Spacer 8 times for loadable protocols. XXXGL: why 8? */
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
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},
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};
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DOMAIN_SET(inet);
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#endif /* INET */
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SYSCTL_NODE(_net, PF_INET, inet, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"Internet Family");
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SYSCTL_NODE(_net_inet, IPPROTO_IP, ip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"IP");
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SYSCTL_NODE(_net_inet, IPPROTO_ICMP, icmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"ICMP");
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SYSCTL_NODE(_net_inet, IPPROTO_UDP, udp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"UDP");
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SYSCTL_NODE(_net_inet, IPPROTO_TCP, tcp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"TCP");
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#if defined(SCTP) || defined(SCTP_SUPPORT)
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SYSCTL_NODE(_net_inet, IPPROTO_SCTP, sctp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"SCTP");
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#endif
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SYSCTL_NODE(_net_inet, IPPROTO_IGMP, igmp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"IGMP");
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#if defined(IPSEC) || defined(IPSEC_SUPPORT)
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/* XXX no protocol # to use, pick something "reserved" */
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SYSCTL_NODE(_net_inet, 253, ipsec, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"IPSEC");
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SYSCTL_NODE(_net_inet, IPPROTO_AH, ah, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"AH");
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SYSCTL_NODE(_net_inet, IPPROTO_ESP, esp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"ESP");
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SYSCTL_NODE(_net_inet, IPPROTO_IPCOMP, ipcomp, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"IPCOMP");
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SYSCTL_NODE(_net_inet, IPPROTO_IPIP, ipip, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"IPIP");
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#endif /* IPSEC */
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SYSCTL_NODE(_net_inet, IPPROTO_RAW, raw, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"RAW");
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SYSCTL_NODE(_net_inet, OID_AUTO, accf, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"Accept filters");
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