gems-kernel/source/THIRDPARTY/xnu/bsd/netinet/in_proto.c
2024-06-03 11:29:39 -05:00

361 lines
12 KiB
C

/*
* 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 <sys/param.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
#include <sys/mbuf.h>
#include <kern/debug.h>
#include <net/if.h>
#include <net/route.h>
#include <net/kpi_protocol.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/ip_icmp.h>
#include <netinet/igmp_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/tcpip.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/ip_encap.h>
/*
* TCP/IP protocol family: IP, ICMP, UDP, TCP.
*/
#if IPSEC
#include <netinet6/ipsec.h>
#include <netinet6/ah.h>
#if IPSEC_ESP
#include <netinet6/esp.h>
#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");