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

259 lines
7.4 KiB
C

/*
* Copyright (c) 2005-2020 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@
*/
#include <sys/types.h>
#include <sys/kernel_types.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/file_internal.h>
#include <sys/stat.h>
#include <sys/select.h>
#include <sys/pipe.h>
#include <sys/proc_info.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/socketvar.h>
#include <sys/unpcb.h>
#include <sys/sys_domain.h>
#include <sys/kern_event.h>
#include <sys/vsock_domain.h>
#include <mach/vm_param.h>
#include <net/ndrv_var.h>
#include <netinet/in_pcb.h>
#include <netinet/tcp_var.h>
#include <string.h>
static void fill_sockbuf_info(struct sockbuf *sb, struct sockbuf_info *sbi);
static void fill_common_sockinfo(struct socket *so, struct socket_info *si);
static void
fill_sockbuf_info(struct sockbuf *sb, struct sockbuf_info *sbi)
{
sbi->sbi_cc = sb->sb_cc;
sbi->sbi_hiwat = sb->sb_hiwat;
sbi->sbi_mbcnt = sb->sb_mbcnt;
sbi->sbi_mbmax = sb->sb_mbmax;
sbi->sbi_lowat = sb->sb_lowat;
sbi->sbi_flags = (short)sb->sb_flags;
sbi->sbi_timeo = (short)((sb->sb_timeo.tv_sec * hz) +
sb->sb_timeo.tv_usec / tick);
if (sbi->sbi_timeo == 0 && sb->sb_timeo.tv_usec != 0) {
sbi->sbi_timeo = 1;
}
}
static void
fill_common_sockinfo(struct socket *so, struct socket_info *si)
{
si->soi_so = (u_int64_t)VM_KERNEL_ADDRPERM(so);
si->soi_type = so->so_type;
si->soi_options = (short)(so->so_options & 0xffff);
si->soi_linger = so->so_linger;
si->soi_state = so->so_state;
si->soi_pcb = (u_int64_t)VM_KERNEL_ADDRPERM(so->so_pcb);
if (so->so_proto) {
si->soi_protocol = SOCK_PROTO(so);
if (so->so_proto->pr_domain) {
si->soi_family = SOCK_DOM(so);
} else {
si->soi_family = 0;
}
} else {
si->soi_protocol = si->soi_family = 0;
}
si->soi_qlen = so->so_qlen;
si->soi_incqlen = so->so_incqlen;
si->soi_qlimit = so->so_qlimit;
si->soi_timeo = so->so_timeo;
si->soi_error = so->so_error;
si->soi_oobmark = so->so_oobmark;
fill_sockbuf_info(&so->so_snd, &si->soi_snd);
fill_sockbuf_info(&so->so_rcv, &si->soi_rcv);
}
errno_t
fill_socketinfo(struct socket *so, struct socket_info *si)
{
errno_t error = 0;
int domain;
short type;
short protocol;
socket_lock(so, 0);
si->soi_kind = SOCKINFO_GENERIC;
fill_common_sockinfo(so, si);
if (so->so_pcb == NULL || so->so_proto == 0 ||
so->so_proto->pr_domain == NULL) {
goto out;
}
/*
* The kind of socket is determined by the triplet
* {domain, type, protocol}
*/
domain = SOCK_DOM(so);
type = SOCK_TYPE(so);
protocol = SOCK_PROTO(so);
switch (domain) {
case PF_INET:
case PF_INET6: {
struct in_sockinfo *insi = &si->soi_proto.pri_in;
struct inpcb *inp = (struct inpcb *)so->so_pcb;
si->soi_kind = SOCKINFO_IN;
insi->insi_fport = inp->inp_fport;
insi->insi_lport = inp->inp_lport;
insi->insi_gencnt = inp->inp_gencnt;
insi->insi_flags = inp->inp_flags;
insi->insi_vflag = inp->inp_vflag;
insi->insi_ip_ttl = inp->inp_ip_ttl;
insi->insi_faddr.ina_6 = inp->inp_dependfaddr.inp6_foreign;
insi->insi_laddr.ina_6 = inp->inp_dependladdr.inp6_local;
insi->insi_v4.in4_tos = inp->inp_depend4.inp4_ip_tos;
insi->insi_v6.in6_hlim = 0;
insi->insi_v6.in6_cksum = inp->inp_depend6.inp6_cksum;
insi->insi_v6.in6_ifindex = 0;
insi->insi_v6.in6_hops = inp->inp_depend6.inp6_hops;
if (type == SOCK_STREAM && (protocol == 0 ||
protocol == IPPROTO_TCP) && inp->inp_ppcb != NULL) {
struct tcp_sockinfo *tcpsi = &si->soi_proto.pri_tcp;
struct tcpcb *tp = (struct tcpcb *)inp->inp_ppcb;
si->soi_kind = SOCKINFO_TCP;
tcpsi->tcpsi_state = tp->t_state;
tcpsi->tcpsi_timer[TSI_T_REXMT] =
tp->t_timer[TCPT_REXMT];
tcpsi->tcpsi_timer[TSI_T_PERSIST] =
tp->t_timer[TCPT_PERSIST];
tcpsi->tcpsi_timer[TSI_T_KEEP] =
tp->t_timer[TCPT_KEEP];
tcpsi->tcpsi_timer[TSI_T_2MSL] =
tp->t_timer[TCPT_2MSL];
tcpsi->tcpsi_mss = tp->t_maxseg;
tcpsi->tcpsi_flags = tp->t_flags;
tcpsi->tcpsi_tp =
(u_int64_t)VM_KERNEL_ADDRPERM(tp);
}
break;
}
case PF_UNIX: {
struct unpcb *unp = (struct unpcb *)so->so_pcb;
struct un_sockinfo *unsi = &si->soi_proto.pri_un;
si->soi_kind = SOCKINFO_UN;
unsi->unsi_conn_pcb =
(uint64_t)VM_KERNEL_ADDRPERM(unp->unp_conn);
if (unp->unp_conn) {
unsi->unsi_conn_so = (uint64_t)
VM_KERNEL_ADDRPERM(unp->unp_conn->unp_socket);
}
if (unp->unp_addr) {
size_t addrlen = unp->unp_addr->sun_len;
if (addrlen > SOCK_MAXADDRLEN) {
addrlen = SOCK_MAXADDRLEN;
}
bcopy(unp->unp_addr, &unsi->unsi_addr, addrlen);
}
if (unp->unp_conn && unp->unp_conn->unp_addr) {
size_t addrlen = unp->unp_conn->unp_addr->sun_len;
if (addrlen > SOCK_MAXADDRLEN) {
addrlen = SOCK_MAXADDRLEN;
}
bcopy(unp->unp_conn->unp_addr, &unsi->unsi_caddr,
addrlen);
}
break;
}
case PF_NDRV: {
struct ndrv_cb *ndrv_cb = (struct ndrv_cb *)so->so_pcb;
struct ndrv_info *ndrvsi = &si->soi_proto.pri_ndrv;
si->soi_kind = SOCKINFO_NDRV;
/* TDB lock ifnet ???? */
if (ndrv_cb->nd_if != 0) {
struct ifnet *ifp = ndrv_cb->nd_if;
ndrvsi->ndrvsi_if_family = ifp->if_family;
ndrvsi->ndrvsi_if_unit = ifp->if_unit;
strlcpy(ndrvsi->ndrvsi_if_name, ifp->if_name, IFNAMSIZ);
}
break;
}
case PF_VSOCK: {
const struct vsockpcb *pcb = (struct vsockpcb *)(so)->so_pcb;
struct vsock_sockinfo *vsocksi = &si->soi_proto.pri_vsock;
si->soi_kind = SOCKINFO_VSOCK;
vsocksi->local_cid = pcb->local_address.cid;
vsocksi->local_port = pcb->local_address.port;
vsocksi->remote_cid = pcb->remote_address.cid;
vsocksi->remote_port = pcb->remote_address.port;
break;
}
case PF_SYSTEM:
if (SOCK_PROTO(so) == SYSPROTO_EVENT) {
struct kern_event_pcb *ev_pcb =
(struct kern_event_pcb *)so->so_pcb;
struct kern_event_info *kesi =
&si->soi_proto.pri_kern_event;
si->soi_kind = SOCKINFO_KERN_EVENT;
kesi->kesi_vendor_code_filter =
ev_pcb->evp_vendor_code_filter;
kesi->kesi_class_filter = ev_pcb->evp_class_filter;
kesi->kesi_subclass_filter = ev_pcb->evp_subclass_filter;
} else if (SOCK_PROTO(so) == SYSPROTO_CONTROL) {
kctl_fill_socketinfo(so, si);
}
break;
case PF_ROUTE:
case PF_PPP:
default:
break;
}
out:
socket_unlock(so, 0);
return error;
}