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gems-kernel/source/THIRDPARTY/xnu/bsd/netinet/mptcp_usrreq.c
Sam Sneed f5727805f2 add darwin/xnu functionality
2024-06-03 11:29:39 -05:00

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/*
* Copyright (c) 2012-2020 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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/mcache.h>
#include <sys/syslog.h>
#include <sys/proc.h>
#include <sys/proc_internal.h>
#include <sys/resourcevar.h>
#include <sys/kauth.h>
#include <sys/priv.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_fsm.h>
#include <netinet/tcp_seq.h>
#include <netinet/tcp_var.h>
#include <netinet/tcp_timer.h>
#include <netinet/mptcp.h>
#include <netinet/mptcp_var.h>
#include <netinet/mptcp_timer.h>
#include <mach/sdt.h>
#include <net/sockaddr_utils.h>
static int mptcp_usr_attach(struct socket *, int, struct proc *);
static int mptcp_usr_detach(struct socket *);
static int mptcp_attach(struct socket *, struct proc *);
static int mptcp_usr_connectx(struct socket *, struct sockaddr *,
struct sockaddr *, struct proc *, uint32_t, sae_associd_t,
sae_connid_t *, uint32_t, void *, uint32_t, struct uio *, user_ssize_t *);
static int mptcp_getassocids(struct mptses *, uint32_t *, user_addr_t);
static int mptcp_getconnids(struct mptses *, sae_associd_t, uint32_t *,
user_addr_t);
static int mptcp_getconninfo(struct mptses *, sae_connid_t *, uint32_t *,
uint32_t *, int32_t *, user_addr_t, socklen_t *, user_addr_t, socklen_t *,
uint32_t *, user_addr_t, uint32_t *);
static int mptcp_usr_control(struct socket *, u_long, caddr_t, struct ifnet *,
struct proc *);
static int mptcp_disconnect(struct mptses *);
static int mptcp_usr_disconnect(struct socket *);
static int mptcp_usr_disconnectx(struct socket *, sae_associd_t, sae_connid_t);
static struct mptses *mptcp_usrclosed(struct mptses *);
static int mptcp_usr_rcvd(struct socket *, int);
static int mptcp_usr_send(struct socket *, int, struct mbuf *,
struct sockaddr *, struct mbuf *, struct proc *);
static int mptcp_usr_shutdown(struct socket *);
static int mptcp_usr_sosend(struct socket *, struct sockaddr *, struct uio *,
struct mbuf *, struct mbuf *, int);
static int mptcp_usr_socheckopt(struct socket *, struct sockopt *);
static int mptcp_usr_preconnect(struct socket *so);
struct pr_usrreqs mptcp_usrreqs = {
.pru_attach = mptcp_usr_attach,
.pru_connectx = mptcp_usr_connectx,
.pru_control = mptcp_usr_control,
.pru_detach = mptcp_usr_detach,
.pru_disconnect = mptcp_usr_disconnect,
.pru_disconnectx = mptcp_usr_disconnectx,
.pru_peeraddr = mp_getpeeraddr,
.pru_rcvd = mptcp_usr_rcvd,
.pru_send = mptcp_usr_send,
.pru_shutdown = mptcp_usr_shutdown,
.pru_sockaddr = mp_getsockaddr,
.pru_sosend = mptcp_usr_sosend,
.pru_soreceive = soreceive,
.pru_socheckopt = mptcp_usr_socheckopt,
.pru_preconnect = mptcp_usr_preconnect,
};
int mptcp_developer_mode = 0;
SYSCTL_INT(_net_inet_mptcp, OID_AUTO, allow_aggregate, CTLFLAG_RW | CTLFLAG_LOCKED,
&mptcp_developer_mode, 0, "Allow the Multipath aggregation mode");
int mptcp_no_first_party = 0;
SYSCTL_INT(_net_inet_mptcp, OID_AUTO, no_first_party, CTLFLAG_RW | CTLFLAG_LOCKED,
&mptcp_no_first_party, 0, "Do not do first-party app exemptions");
static unsigned long mptcp_expected_progress_headstart = 5000;
SYSCTL_ULONG(_net_inet_mptcp, OID_AUTO, expected_progress_headstart, CTLFLAG_RW | CTLFLAG_LOCKED,
&mptcp_expected_progress_headstart, "Headstart to give MPTCP before meeting the progress deadline");
/*
* Attaches an MPTCP control block to a socket.
*/
static int
mptcp_usr_attach(struct socket *mp_so, int proto, struct proc *p)
{
#pragma unused(proto)
int error;
VERIFY(mpsotomppcb(mp_so) == NULL);
error = mptcp_attach(mp_so, p);
if (error) {
goto out;
}
if ((mp_so->so_options & SO_LINGER) && mp_so->so_linger == 0) {
mp_so->so_linger = (short)(TCP_LINGERTIME * hz);
}
out:
return error;
}
/*
* Detaches an MPTCP control block from a socket.
*/
static int
mptcp_usr_detach(struct socket *mp_so)
{
struct mptses *mpte = mpsotompte(mp_so);
struct mppcb *mpp = mpsotomppcb(mp_so);
if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) {
os_log_error(mptcp_log_handle, "%s - %lx: state: %d\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte),
mpp ? mpp->mpp_state : -1);
return EINVAL;
}
/*
* We are done with this MPTCP socket (it has been closed);
* trigger all subflows to be disconnected, if not already,
* by initiating the PCB detach sequence (SOF_PCBCLEARING
* will be set.)
*/
mp_pcbdetach(mp_so);
mptcp_disconnect(mpte);
return 0;
}
/*
* Attach MPTCP protocol to socket, allocating MP control block,
* MPTCP session, control block, buffer space, etc.
*/
static int
mptcp_attach(struct socket *mp_so, struct proc *p)
{
#pragma unused(p)
struct mptses *mpte = NULL;
struct mptcb *mp_tp = NULL;
struct mppcb *mpp = NULL;
int error = 0;
if (mp_so->so_snd.sb_hiwat == 0 || mp_so->so_rcv.sb_hiwat == 0) {
error = soreserve(mp_so, tcp_sendspace, tcp_recvspace);
if (error != 0) {
goto out;
}
}
if (mp_so->so_snd.sb_preconn_hiwat == 0) {
soreserve_preconnect(mp_so, 2048);
}
if ((mp_so->so_rcv.sb_flags & SB_USRSIZE) == 0) {
mp_so->so_rcv.sb_flags |= SB_AUTOSIZE;
}
if ((mp_so->so_snd.sb_flags & SB_USRSIZE) == 0) {
mp_so->so_snd.sb_flags |= SB_AUTOSIZE;
}
/*
* MPTCP send-socket buffers cannot be compressed, due to the
* fact that each mbuf chained via m_next is a M_PKTHDR
* which carries some MPTCP metadata.
*/
mp_so->so_snd.sb_flags |= SB_NOCOMPRESS;
if ((error = mp_pcballoc(mp_so, &mtcbinfo)) != 0) {
goto out;
}
mpp = mpsotomppcb(mp_so);
mpte = (struct mptses *)mpp->mpp_pcbe;
mp_tp = mpte->mpte_mptcb;
VERIFY(mp_tp != NULL);
out:
return error;
}
static int
mptcp_entitlement_check(struct socket *mp_so, uint8_t svctype)
{
struct mptses *mpte = mpsotompte(mp_so);
if (mptcp_no_first_party) {
return 0;
}
/* First, check for mptcp_extended without delegation */
if (soopt_cred_check(mp_so, PRIV_NET_RESTRICTED_MULTIPATH_EXTENDED, TRUE, FALSE) == 0) {
/*
* This means the app has the extended entitlement. Thus,
* it's a first party app and can run without restrictions.
*/
mpte->mpte_flags |= MPTE_FIRSTPARTY;
return 0;
}
/* Now with delegation */
if (mp_so->so_flags & SOF_DELEGATED &&
soopt_cred_check(mp_so, PRIV_NET_RESTRICTED_MULTIPATH_EXTENDED, TRUE, TRUE) == 0) {
/*
* This means the app has the extended entitlement. Thus,
* it's a first party app and can run without restrictions.
*/
mpte->mpte_flags |= MPTE_FIRSTPARTY;
return 0;
}
if (svctype == MPTCP_SVCTYPE_AGGREGATE) {
if (mptcp_developer_mode) {
return 0;
}
os_log_error(mptcp_log_handle, "%s - %lx: MPTCP prohibited on svc %u\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte), mpte->mpte_svctype);
return -1;
}
return 0;
}
/*
* Common subroutine to open a MPTCP connection to one of the remote hosts
* specified by dst_sl. This includes allocating and establishing a
* subflow TCP connection, either initially to establish MPTCP connection,
* or to join an existing one. Returns a connection handle upon success.
*/
static int
mptcp_connectx(struct mptses *mpte, struct sockaddr *src,
struct sockaddr *dst, uint32_t ifscope, sae_connid_t *pcid)
{
int error = 0;
VERIFY(dst != NULL);
VERIFY(pcid != NULL);
error = mptcp_subflow_add(mpte, src, dst, ifscope, pcid);
return error;
}
/*
* User-protocol pru_connectx callback.
*/
static int
mptcp_usr_connectx(struct socket *mp_so, struct sockaddr *src,
struct sockaddr *dst, struct proc *p, uint32_t ifscope,
sae_associd_t aid, sae_connid_t *pcid, uint32_t flags, void *arg,
uint32_t arglen, struct uio *auio, user_ssize_t *bytes_written)
{
#pragma unused(p, aid, flags, arg, arglen)
struct mppcb *mpp = mpsotomppcb(mp_so);
struct mptses *mpte = NULL;
struct mptcb *mp_tp = NULL;
user_ssize_t datalen;
int error = 0;
if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) {
os_log_error(mptcp_log_handle, "%s - %lx: state %d\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte),
mpp ? mpp->mpp_state : -1);
error = EINVAL;
goto out;
}
mpte = mptompte(mpp);
mp_tp = mpte->mpte_mptcb;
if (mp_tp->mpt_flags & MPTCPF_FALLBACK_TO_TCP) {
os_log_error(mptcp_log_handle, "%s - %lx: fell back to TCP\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte));
error = EINVAL;
goto out;
}
if (dst->sa_family != AF_INET && dst->sa_family != AF_INET6) {
error = EAFNOSUPPORT;
goto out;
}
if (dst->sa_family == AF_INET &&
dst->sa_len != sizeof(mpte->__mpte_dst_v4)) {
os_log_error(mptcp_log_handle, "%s - %lx: IPv4 dst len %u\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte), dst->sa_len);
error = EINVAL;
goto out;
}
if (dst->sa_family == AF_INET6 &&
dst->sa_len != sizeof(mpte->__mpte_dst_v6)) {
os_log_error(mptcp_log_handle, "%s - %lx: IPv6 dst len %u\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte), dst->sa_len);
error = EINVAL;
goto out;
}
if (!(mpte->mpte_flags & MPTE_SVCTYPE_CHECKED)) {
if (mptcp_entitlement_check(mp_so, mpte->mpte_svctype) < 0) {
error = EPERM;
goto out;
}
mpte->mpte_flags |= MPTE_SVCTYPE_CHECKED;
}
if ((mp_so->so_state & (SS_ISCONNECTED | SS_ISCONNECTING)) == 0) {
SOCKADDR_COPY(dst, &mpte->mpte_dst, dst->sa_len);
if (dst->sa_family == AF_INET) {
SOCKADDR_COPY(dst, &mpte->mpte_sub_dst_v4, dst->sa_len);
} else {
SOCKADDR_COPY(dst, &mpte->mpte_sub_dst_v6, dst->sa_len);
}
}
if (src) {
if (src->sa_family != AF_INET && src->sa_family != AF_INET6) {
error = EAFNOSUPPORT;
goto out;
}
if (src->sa_family == AF_INET &&
src->sa_len != sizeof(mpte->__mpte_src_v4)) {
os_log_error(mptcp_log_handle, "%s - %lx: IPv4 src len %u\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte), src->sa_len);
error = EINVAL;
goto out;
}
if (src->sa_family == AF_INET6 &&
src->sa_len != sizeof(mpte->__mpte_src_v6)) {
os_log_error(mptcp_log_handle, "%s - %lx: IPv6 src len %u\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte), src->sa_len);
error = EINVAL;
goto out;
}
if ((mp_so->so_state & (SS_ISCONNECTED | SS_ISCONNECTING)) == 0) {
SOCKADDR_COPY(src, &mpte->mpte_src, src->sa_len);
}
}
error = mptcp_connectx(mpte, src, dst, ifscope, pcid);
/* If there is data, copy it */
if (auio != NULL) {
datalen = uio_resid(auio);
socket_unlock(mp_so, 0);
error = mp_so->so_proto->pr_usrreqs->pru_sosend(mp_so, NULL,
(uio_t) auio, NULL, NULL, 0);
if (error == 0 || error == EWOULDBLOCK) {
*bytes_written = datalen - uio_resid(auio);
}
if (error == EWOULDBLOCK) {
error = EINPROGRESS;
}
socket_lock(mp_so, 0);
}
out:
return error;
}
/*
* Handle SIOCGASSOCIDS ioctl for PF_MULTIPATH domain.
*/
static int
mptcp_getassocids(struct mptses *mpte, uint32_t *cnt, user_addr_t aidp)
{
/* MPTCP has at most 1 association */
*cnt = (mpte->mpte_associd != SAE_ASSOCID_ANY) ? 1 : 0;
/* just asking how many there are? */
if (aidp == USER_ADDR_NULL) {
return 0;
}
return copyout(&mpte->mpte_associd, aidp,
sizeof(mpte->mpte_associd));
}
/*
* Handle SIOCGCONNIDS ioctl for PF_MULTIPATH domain.
*/
static int
mptcp_getconnids(struct mptses *mpte, sae_associd_t aid, uint32_t *cnt,
user_addr_t cidp)
{
struct mptsub *mpts;
int error = 0;
if (aid != SAE_ASSOCID_ANY && aid != SAE_ASSOCID_ALL &&
aid != mpte->mpte_associd) {
return EINVAL;
}
*cnt = mpte->mpte_numflows;
/* just asking how many there are? */
if (cidp == USER_ADDR_NULL) {
return 0;
}
TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) {
if ((error = copyout(&mpts->mpts_connid, cidp,
sizeof(mpts->mpts_connid))) != 0) {
break;
}
cidp += sizeof(mpts->mpts_connid);
}
return error;
}
/*
* Handle SIOCGCONNINFO ioctl for PF_MULTIPATH domain.
*/
static int
mptcp_getconninfo(struct mptses *mpte, sae_connid_t *cid, uint32_t *flags,
uint32_t *ifindex, int32_t *soerror, user_addr_t src, socklen_t *src_len,
user_addr_t dst, socklen_t *dst_len, uint32_t *aux_type,
user_addr_t aux_data, uint32_t *aux_len)
{
*flags = 0;
*aux_type = 0;
*ifindex = 0;
*soerror = 0;
struct mptcb *mp_tp = mpte->mpte_mptcb;
/* MPTCP-level global stats */
if (*cid == SAE_CONNID_ALL) {
struct socket *mp_so = mptetoso(mpte);
struct conninfo_multipathtcp mptcp_ci;
int error = 0;
if (*aux_len != 0 && *aux_len != sizeof(mptcp_ci)) {
return EINVAL;
}
if (mp_so->so_state & SS_ISCONNECTING) {
*flags |= CIF_CONNECTING;
}
if (mp_so->so_state & SS_ISCONNECTED) {
*flags |= CIF_CONNECTED;
}
if (mp_so->so_state & SS_ISDISCONNECTING) {
*flags |= CIF_DISCONNECTING;
}
if (mp_so->so_state & SS_ISDISCONNECTED) {
*flags |= CIF_DISCONNECTED;
}
if (!(mp_tp->mpt_flags & MPTCPF_FALLBACK_TO_TCP)) {
*flags |= CIF_MP_CAPABLE;
}
if (mp_tp->mpt_flags & MPTCPF_FALLBACK_TO_TCP) {
*flags |= CIF_MP_DEGRADED;
}
if (mp_tp->mpt_version == MPTCP_VERSION_1) {
*flags |= CIF_MP_V1;
}
*src_len = 0;
*dst_len = 0;
*aux_type = CIAUX_MPTCP;
*aux_len = sizeof(mptcp_ci);
if (aux_data != USER_ADDR_NULL) {
const struct mptsub *mpts;
int initial_info_set = 0;
unsigned long i = 0;
bzero(&mptcp_ci, sizeof(mptcp_ci));
mptcp_ci.mptcpci_subflow_count = mpte->mpte_numflows;
mptcp_ci.mptcpci_switch_count = mpte->mpte_subflow_switches;
VERIFY(sizeof(mptcp_ci.mptcpci_itfstats) == sizeof(mpte->mpte_itfstats));
memcpy(mptcp_ci.mptcpci_itfstats, mpte->mpte_itfstats, sizeof(mptcp_ci.mptcpci_itfstats));
TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) {
if (i >= sizeof(mptcp_ci.mptcpci_subflow_connids) / sizeof(sae_connid_t)) {
break;
}
mptcp_ci.mptcpci_subflow_connids[i] = mpts->mpts_connid;
if (mpts->mpts_flags & MPTSF_INITIAL_SUB) {
const struct inpcb *inp;
inp = sotoinpcb(mpts->mpts_socket);
mptcp_ci.mptcpci_init_rxbytes = inp->inp_stat->rxbytes;
mptcp_ci.mptcpci_init_txbytes = inp->inp_stat->txbytes;
initial_info_set = 1;
}
mptcpstats_update(mptcp_ci.mptcpci_itfstats, mpts);
i++;
}
if (initial_info_set == 0) {
mptcp_ci.mptcpci_init_rxbytes = mpte->mpte_init_rxbytes;
mptcp_ci.mptcpci_init_txbytes = mpte->mpte_init_txbytes;
}
if (mpte->mpte_flags & MPTE_FIRSTPARTY) {
mptcp_ci.mptcpci_flags |= MPTCPCI_FIRSTPARTY;
}
error = copyout(&mptcp_ci, aux_data, sizeof(mptcp_ci));
if (error != 0) {
os_log_error(mptcp_log_handle, "%s - %lx: copyout failed: %d\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte), error);
return error;
}
}
return 0;
}
/* Any stats of any subflow */
if (*cid == SAE_CONNID_ANY) {
const struct mptsub *mpts;
struct socket *so;
const struct inpcb *inp;
int error = 0;
mpts = TAILQ_FIRST(&mpte->mpte_subflows);
if (mpts == NULL) {
return ENXIO;
}
so = mpts->mpts_socket;
inp = sotoinpcb(so);
if (inp->inp_vflag & INP_IPV4) {
error = in_getconninfo(so, SAE_CONNID_ANY, flags, ifindex,
soerror, src, src_len, dst, dst_len,
aux_type, aux_data, aux_len);
} else {
error = in6_getconninfo(so, SAE_CONNID_ANY, flags, ifindex,
soerror, src, src_len, dst, dst_len,
aux_type, aux_data, aux_len);
}
if (error != 0) {
os_log_error(mptcp_log_handle, "%s - %lx:error from in_getconninfo %d\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte), error);
return error;
}
if (mpts->mpts_flags & MPTSF_MP_CAPABLE) {
*flags |= CIF_MP_CAPABLE;
}
if (mpts->mpts_flags & MPTSF_MP_DEGRADED) {
*flags |= CIF_MP_DEGRADED;
}
if (mpts->mpts_flags & MPTSF_MP_READY) {
*flags |= CIF_MP_READY;
}
if (mpts->mpts_flags & MPTSF_ACTIVE) {
*flags |= CIF_MP_ACTIVE;
}
if (mp_tp->mpt_version == MPTCP_VERSION_1) {
*flags |= CIF_MP_V1;
}
return 0;
} else {
/* Per-interface stats */
const struct mptsub *mpts, *orig_mpts = NULL;
struct conninfo_tcp tcp_ci;
const struct inpcb *inp;
struct socket *so;
int error = 0;
int index;
/* cid is thus an ifindex - range-check first! */
if (*cid > USHRT_MAX) {
return EINVAL;
}
bzero(&tcp_ci, sizeof(tcp_ci));
/* First, get a subflow to fill in the "regular" info. */
TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) {
const struct ifnet *ifp = sotoinpcb(mpts->mpts_socket)->inp_last_outifp;
if (ifp && ifp->if_index == *cid) {
break;
}
}
if (mpts == NULL) {
/* No subflow there - well, let's just get the basic itf-info */
goto interface_info;
}
so = mpts->mpts_socket;
inp = sotoinpcb(so);
/* Give it USER_ADDR_NULL, because we are doing this on our own */
if (inp->inp_vflag & INP_IPV4) {
error = in_getconninfo(so, SAE_CONNID_ANY, flags, ifindex,
soerror, src, src_len, dst, dst_len,
aux_type, USER_ADDR_NULL, aux_len);
} else {
error = in6_getconninfo(so, SAE_CONNID_ANY, flags, ifindex,
soerror, src, src_len, dst, dst_len,
aux_type, USER_ADDR_NULL, aux_len);
}
if (error != 0) {
os_log_error(mptcp_log_handle, "%s - %lx:error from in_getconninfo %d\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte), error);
return error;
}
/* ToDo: Nobody is reading these flags on subflows. Why bother ? */
if (mpts->mpts_flags & MPTSF_MP_CAPABLE) {
*flags |= CIF_MP_CAPABLE;
}
if (mpts->mpts_flags & MPTSF_MP_DEGRADED) {
*flags |= CIF_MP_DEGRADED;
}
if (mpts->mpts_flags & MPTSF_MP_READY) {
*flags |= CIF_MP_READY;
}
if (mpts->mpts_flags & MPTSF_ACTIVE) {
*flags |= CIF_MP_ACTIVE;
}
if (mp_tp->mpt_version == MPTCP_VERSION_1) {
*flags |= CIF_MP_V1;
}
/*
* Now, we gather the metrics (aka., tcp_info) and roll them in
* across all subflows of this interface to build an aggregated
* view.
*
* We take the TCP_INFO from the first subflow as the "master",
* feeding into those fields that we do not roll.
*/
if (aux_data != USER_ADDR_NULL) {
tcp_getconninfo(so, &tcp_ci);
orig_mpts = mpts;
TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) {
const struct inpcb *mptsinp = sotoinpcb(mpts->mpts_socket);
const struct ifnet *ifp;
ifp = mptsinp->inp_last_outifp;
if (ifp == NULL || ifp->if_index != *cid || mpts == orig_mpts) {
continue;
}
/* Roll the itf-stats into the tcp_info */
tcp_ci.tcpci_tcp_info.tcpi_txbytes +=
mptsinp->inp_stat->txbytes;
tcp_ci.tcpci_tcp_info.tcpi_rxbytes +=
mptsinp->inp_stat->rxbytes;
tcp_ci.tcpci_tcp_info.tcpi_wifi_txbytes +=
mptsinp->inp_wstat->txbytes;
tcp_ci.tcpci_tcp_info.tcpi_wifi_rxbytes +=
mptsinp->inp_wstat->rxbytes;
tcp_ci.tcpci_tcp_info.tcpi_wired_txbytes +=
mptsinp->inp_Wstat->txbytes;
tcp_ci.tcpci_tcp_info.tcpi_wired_rxbytes +=
mptsinp->inp_Wstat->rxbytes;
tcp_ci.tcpci_tcp_info.tcpi_cell_txbytes +=
mptsinp->inp_cstat->txbytes;
tcp_ci.tcpci_tcp_info.tcpi_cell_rxbytes +=
mptsinp->inp_cstat->rxbytes;
}
}
interface_info:
*aux_type = CIAUX_TCP;
if (*aux_len == 0) {
*aux_len = sizeof(tcp_ci);
} else if (aux_data != USER_ADDR_NULL) {
boolean_t create;
/*
* Finally, old subflows might have been closed - we
* want this data as well, so grab it from the interface
* stats.
*/
create = orig_mpts != NULL;
/*
* When we found a subflow, we are willing to create a stats-index
* because we have some data to return. If there isn't a subflow,
* nor anything in the stats, return EINVAL. Because the
* ifindex belongs to something that doesn't exist.
*/
index = mptcpstats_get_index_by_ifindex(mpte->mpte_itfstats, (u_short)(*cid), false);
if (index == -1) {
os_log_error(mptcp_log_handle,
"%s - %lx: Asking for too many ifindex: %u subcount %u, mpts? %s\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte),
*cid, mpte->mpte_numflows,
orig_mpts ? "yes" : "no");
if (orig_mpts == NULL) {
return EINVAL;
}
} else {
struct mptcp_itf_stats *stats;
stats = &mpte->mpte_itfstats[index];
/* Roll the itf-stats into the tcp_info */
tcp_ci.tcpci_tcp_info.tcpi_last_outif = *cid;
tcp_ci.tcpci_tcp_info.tcpi_txbytes +=
stats->mpis_txbytes;
tcp_ci.tcpci_tcp_info.tcpi_rxbytes +=
stats->mpis_rxbytes;
tcp_ci.tcpci_tcp_info.tcpi_wifi_txbytes +=
stats->mpis_wifi_txbytes;
tcp_ci.tcpci_tcp_info.tcpi_wifi_rxbytes +=
stats->mpis_wifi_rxbytes;
tcp_ci.tcpci_tcp_info.tcpi_wired_txbytes +=
stats->mpis_wired_txbytes;
tcp_ci.tcpci_tcp_info.tcpi_wired_rxbytes +=
stats->mpis_wired_rxbytes;
tcp_ci.tcpci_tcp_info.tcpi_cell_txbytes +=
stats->mpis_cell_txbytes;
tcp_ci.tcpci_tcp_info.tcpi_cell_rxbytes +=
stats->mpis_cell_rxbytes;
}
*aux_len = min(*aux_len, sizeof(tcp_ci));
error = copyout(&tcp_ci, aux_data, *aux_len);
if (error != 0) {
return error;
}
}
}
return 0;
}
/*
* User-protocol pru_control callback.
*/
static int
mptcp_usr_control(struct socket *mp_so, u_long cmd, caddr_t data,
struct ifnet *ifp, struct proc *p)
{
#pragma unused(ifp, p)
struct mppcb *mpp = mpsotomppcb(mp_so);
struct mptses *mpte;
int error = 0;
if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) {
error = EINVAL;
goto out;
}
mpte = mptompte(mpp);
switch (cmd) {
case SIOCGASSOCIDS32: { /* struct so_aidreq32 */
struct so_aidreq32 aidr;
bcopy(data, &aidr, sizeof(aidr));
error = mptcp_getassocids(mpte, &aidr.sar_cnt,
aidr.sar_aidp);
if (error == 0) {
bcopy(&aidr, data, sizeof(aidr));
}
break;
}
case SIOCGASSOCIDS64: { /* struct so_aidreq64 */
struct so_aidreq64 aidr;
bcopy(data, &aidr, sizeof(aidr));
error = mptcp_getassocids(mpte, &aidr.sar_cnt,
(user_addr_t)aidr.sar_aidp);
if (error == 0) {
bcopy(&aidr, data, sizeof(aidr));
}
break;
}
case SIOCGCONNIDS32: { /* struct so_cidreq32 */
struct so_cidreq32 cidr;
bcopy(data, &cidr, sizeof(cidr));
error = mptcp_getconnids(mpte, cidr.scr_aid, &cidr.scr_cnt,
cidr.scr_cidp);
if (error == 0) {
bcopy(&cidr, data, sizeof(cidr));
}
break;
}
case SIOCGCONNIDS64: { /* struct so_cidreq64 */
struct so_cidreq64 cidr;
bcopy(data, &cidr, sizeof(cidr));
error = mptcp_getconnids(mpte, cidr.scr_aid, &cidr.scr_cnt,
(user_addr_t)cidr.scr_cidp);
if (error == 0) {
bcopy(&cidr, data, sizeof(cidr));
}
break;
}
case SIOCGCONNINFO32: { /* struct so_cinforeq32 */
struct so_cinforeq32 cifr;
bcopy(data, &cifr, sizeof(cifr));
error = mptcp_getconninfo(mpte, &cifr.scir_cid,
&cifr.scir_flags, &cifr.scir_ifindex, &cifr.scir_error,
cifr.scir_src, &cifr.scir_src_len, cifr.scir_dst,
&cifr.scir_dst_len, &cifr.scir_aux_type, cifr.scir_aux_data,
&cifr.scir_aux_len);
if (error == 0) {
bcopy(&cifr, data, sizeof(cifr));
}
break;
}
case SIOCGCONNINFO64: { /* struct so_cinforeq64 */
struct so_cinforeq64 cifr;
bcopy(data, &cifr, sizeof(cifr));
error = mptcp_getconninfo(mpte, &cifr.scir_cid,
&cifr.scir_flags, &cifr.scir_ifindex, &cifr.scir_error,
(user_addr_t)cifr.scir_src, &cifr.scir_src_len,
(user_addr_t)cifr.scir_dst, &cifr.scir_dst_len,
&cifr.scir_aux_type, (user_addr_t)cifr.scir_aux_data,
&cifr.scir_aux_len);
if (error == 0) {
bcopy(&cifr, data, sizeof(cifr));
}
break;
}
default:
error = EOPNOTSUPP;
break;
}
out:
return error;
}
static int
mptcp_disconnect(struct mptses *mpte)
{
struct socket *mp_so;
struct mptcb *mp_tp;
int error = 0;
mp_so = mptetoso(mpte);
mp_tp = mpte->mpte_mptcb;
/* if we're not detached, go thru socket state checks */
if (!(mp_so->so_flags & SOF_PCBCLEARING) && !(mp_so->so_flags & SOF_DEFUNCT)) {
if (!(mp_so->so_state & (SS_ISCONNECTED |
SS_ISCONNECTING))) {
error = ENOTCONN;
goto out;
}
if (mp_so->so_state & SS_ISDISCONNECTING) {
error = EALREADY;
goto out;
}
}
mptcp_cancel_all_timers(mp_tp);
if (mp_tp->mpt_state < MPTCPS_ESTABLISHED) {
mptcp_close(mpte, mp_tp);
} else if (((mp_so->so_options & SO_LINGER) &&
mp_so->so_linger == 0) ||
(mp_so->so_flags1 & SOF1_DEFUNCTINPROG)) {
mptcp_drop(mpte, mp_tp, 0);
} else {
soisdisconnecting(mp_so);
sbflush(&mp_so->so_rcv);
if (mptcp_usrclosed(mpte) != NULL) {
mptcp_output(mpte);
}
}
if (error == 0) {
mptcp_subflow_workloop(mpte);
}
out:
return error;
}
/*
* Wrapper function to support disconnect on socket
*/
static int
mptcp_usr_disconnect(struct socket *mp_so)
{
return mptcp_disconnect(mpsotompte(mp_so));
}
/*
* User-protocol pru_disconnectx callback.
*/
static int
mptcp_usr_disconnectx(struct socket *mp_so, sae_associd_t aid, sae_connid_t cid)
{
if (aid != SAE_ASSOCID_ANY && aid != SAE_ASSOCID_ALL) {
return EINVAL;
}
if (cid != SAE_CONNID_ANY && cid != SAE_CONNID_ALL) {
return EINVAL;
}
return mptcp_usr_disconnect(mp_so);
}
void
mptcp_finish_usrclosed(struct mptses *mpte)
{
struct mptcb *mp_tp = mpte->mpte_mptcb;
struct socket *mp_so = mptetoso(mpte);
if (mp_tp->mpt_state == MPTCPS_CLOSED || mp_tp->mpt_state == MPTCPS_TERMINATE) {
mpte = mptcp_close(mpte, mp_tp);
} else if (mp_tp->mpt_state >= MPTCPS_FIN_WAIT_2) {
soisdisconnected(mp_so);
} else {
struct mptsub *mpts;
TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) {
if ((mp_so->so_state & (SS_CANTRCVMORE | SS_CANTSENDMORE)) ==
(SS_CANTRCVMORE | SS_CANTSENDMORE)) {
mptcp_subflow_disconnect(mpte, mpts);
} else {
mptcp_subflow_shutdown(mpte, mpts);
}
}
}
}
/*
* User issued close, and wish to trail thru shutdown states.
*/
static struct mptses *
mptcp_usrclosed(struct mptses *mpte)
{
struct mptcb *mp_tp = mpte->mpte_mptcb;
mptcp_close_fsm(mp_tp, MPCE_CLOSE);
/* Not everything has been acknowledged - don't close the subflows! */
if (mp_tp->mpt_state != MPTCPS_TERMINATE &&
mp_tp->mpt_sndnxt + 1 != mp_tp->mpt_sndmax) {
return mpte;
}
mptcp_finish_usrclosed(mpte);
return mpte;
}
/*
* After a receive, possible send some update to peer.
*/
static int
mptcp_usr_rcvd(struct socket *mp_so, int flags)
{
#pragma unused(flags)
struct mppcb *mpp = mpsotomppcb(mp_so);
struct mptses *mpte;
struct mptsub *mpts;
int error = 0;
if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) {
error = EINVAL;
goto out;
}
mpte = mptompte(mpp);
TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) {
struct socket *so = mpts->mpts_socket;
if (so->so_proto->pr_flags & PR_WANTRCVD && so->so_pcb != NULL) {
(*so->so_proto->pr_usrreqs->pru_rcvd)(so, 0);
}
}
error = mptcp_output(mpte);
out:
return error;
}
/*
* Do a send by putting data in the output queue.
*/
static int
mptcp_usr_send(struct socket *mp_so, int prus_flags, struct mbuf *m,
struct sockaddr *nam, struct mbuf *control, struct proc *p)
{
#pragma unused(nam, p)
struct mppcb *mpp = mpsotomppcb(mp_so);
struct mptses *mpte;
int error = 0;
if (prus_flags & (PRUS_OOB | PRUS_EOF)) {
error = EOPNOTSUPP;
goto out;
}
if (nam != NULL) {
error = EOPNOTSUPP;
goto out;
}
if (control != NULL && control->m_len != 0) {
error = EOPNOTSUPP;
goto out;
}
if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) {
error = ECONNRESET;
goto out;
}
mpte = mptompte(mpp);
VERIFY(mpte != NULL);
if (!(mp_so->so_state & SS_ISCONNECTED) &&
!(mp_so->so_flags1 & SOF1_PRECONNECT_DATA)) {
error = ENOTCONN;
goto out;
}
mptcp_insert_dsn(mpp, m);
VERIFY(mp_so->so_snd.sb_flags & SB_NOCOMPRESS);
sbappendstream(&mp_so->so_snd, m);
m = NULL;
error = mptcp_output(mpte);
if (error != 0) {
goto out;
}
if (mp_so->so_state & SS_ISCONNECTING) {
if (mp_so->so_state & SS_NBIO) {
error = EWOULDBLOCK;
} else {
error = sbwait(&mp_so->so_snd);
}
}
out:
if (error) {
if (m != NULL) {
m_freem(m);
}
if (control != NULL) {
m_freem(control);
}
}
return error;
}
/*
* Mark the MPTCP connection as being incapable of further output.
*/
static int
mptcp_usr_shutdown(struct socket *mp_so)
{
struct mppcb *mpp = mpsotomppcb(mp_so);
struct mptses *mpte;
int error = 0;
if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) {
error = EINVAL;
goto out;
}
mpte = mptompte(mpp);
VERIFY(mpte != NULL);
socantsendmore(mp_so);
mpte = mptcp_usrclosed(mpte);
if (mpte != NULL) {
error = mptcp_output(mpte);
}
out:
return error;
}
/*
* Copy the contents of uio into a properly sized mbuf chain.
*/
static int
mptcp_uiotombuf(struct uio *uio, int how, user_ssize_t space, struct mbuf **top)
{
struct mbuf *m, *mb, *nm = NULL, *mtail = NULL;
int progress, len, error;
user_ssize_t resid, tot;
VERIFY(top != NULL && *top == NULL);
/*
* space can be zero or an arbitrary large value bound by
* the total data supplied by the uio.
*/
resid = uio_resid(uio);
if (space > 0) {
tot = MIN(resid, space);
} else {
tot = resid;
}
if (tot < 0 || tot > INT_MAX) {
return EINVAL;
}
len = (int)tot;
if (len == 0) {
len = 1;
}
/* Loop and append maximum sized mbufs to the chain tail. */
while (len > 0) {
uint32_t m_needed = 1;
if (njcl > 0 && len > MBIGCLBYTES) {
mb = m_getpackets_internal(&m_needed, 1,
how, 1, M16KCLBYTES);
} else if (len > MCLBYTES) {
mb = m_getpackets_internal(&m_needed, 1,
how, 1, MBIGCLBYTES);
} else if (len >= (signed)MINCLSIZE) {
mb = m_getpackets_internal(&m_needed, 1,
how, 1, MCLBYTES);
} else {
mb = m_gethdr(how, MT_DATA);
}
/* Fail the whole operation if one mbuf can't be allocated. */
if (mb == NULL) {
if (nm != NULL) {
m_freem(nm);
}
return ENOBUFS;
}
/* Book keeping. */
VERIFY(mb->m_flags & M_PKTHDR);
len -= ((mb->m_flags & M_EXT) ? mb->m_ext.ext_size : MHLEN);
if (mtail != NULL) {
mtail->m_next = mb;
} else {
nm = mb;
}
mtail = mb;
}
m = nm;
progress = 0;
/* Fill all mbufs with uio data and update header information. */
for (mb = m; mb != NULL; mb = mb->m_next) {
/* tot >= 0 && tot <= INT_MAX (see above) */
len = MIN((int)M_TRAILINGSPACE(mb), (int)(tot - progress));
error = uiomove(mtod(mb, char *), len, uio);
if (error != 0) {
m_freem(m);
return error;
}
/* each mbuf is M_PKTHDR chained via m_next */
mb->m_len = len;
mb->m_pkthdr.len = len;
progress += len;
}
VERIFY(progress == tot);
*top = m;
return 0;
}
/*
* MPTCP socket protocol-user socket send routine, derived from sosend().
*/
static int
mptcp_usr_sosend(struct socket *mp_so, struct sockaddr *addr, struct uio *uio,
struct mbuf *top, struct mbuf *control, int flags)
{
#pragma unused(addr)
user_ssize_t resid, space;
int error, sendflags;
struct proc *p = current_proc();
int sblocked = 0;
/* UIO is required for now, due to per-mbuf M_PKTHDR constrains */
if (uio == NULL || top != NULL) {
error = EINVAL;
goto out;
}
resid = uio_resid(uio);
socket_lock(mp_so, 1);
so_update_last_owner_locked(mp_so, p);
so_update_policy(mp_so);
VERIFY(mp_so->so_type == SOCK_STREAM);
VERIFY(!(mp_so->so_flags & SOF_MP_SUBFLOW));
if (flags & (MSG_OOB | MSG_DONTROUTE)) {
error = EOPNOTSUPP;
socket_unlock(mp_so, 1);
goto out;
}
/*
* In theory resid should be unsigned. However, space must be
* signed, as it might be less than 0 if we over-committed, and we
* must use a signed comparison of space and resid. On the other
* hand, a negative resid causes us to loop sending 0-length
* segments to the protocol.
*/
if (resid < 0 || resid > INT_MAX ||
(flags & MSG_EOR) || control != NULL) {
error = EINVAL;
socket_unlock(mp_so, 1);
goto out;
}
OSIncrementAtomicLong(&p->p_stats->p_ru.ru_msgsnd);
do {
error = sosendcheck(mp_so, NULL, resid, 0, 0, flags,
&sblocked);
if (error != 0) {
goto release;
}
space = sbspace(&mp_so->so_snd);
do {
socket_unlock(mp_so, 0);
/*
* Copy the data from userland into an mbuf chain.
*/
error = mptcp_uiotombuf(uio, M_WAITOK, space, &top);
if (error != 0) {
socket_lock(mp_so, 0);
goto release;
}
VERIFY(top != NULL);
space -= resid - uio_resid(uio);
resid = uio_resid(uio);
socket_lock(mp_so, 0);
/*
* Compute flags here, for pru_send and NKEs.
*/
sendflags = (resid > 0 && space > 0) ?
PRUS_MORETOCOME : 0;
/*
* Socket filter processing
*/
VERIFY(control == NULL);
error = sflt_data_out(mp_so, NULL, &top, &control, 0);
if (error != 0) {
if (error == EJUSTRETURN) {
error = 0;
top = NULL;
/* always free control if any */
}
goto release;
}
if (control != NULL) {
m_freem(control);
control = NULL;
}
/*
* Pass data to protocol.
*/
error = (*mp_so->so_proto->pr_usrreqs->pru_send)
(mp_so, sendflags, top, NULL, NULL, p);
top = NULL;
if (error != 0) {
goto release;
}
} while (resid != 0 && space > 0);
} while (resid != 0);
release:
if (sblocked) {
sbunlock(&mp_so->so_snd, FALSE); /* will unlock socket */
} else {
socket_unlock(mp_so, 1);
}
out:
if (top != NULL) {
m_freem(top);
}
if (control != NULL) {
m_freem(control);
}
soclearfastopen(mp_so);
return error;
}
/*
* Called to filter SOPT_{SET,GET} for SOL_SOCKET level socket options.
* This routine simply indicates to the caller whether or not to proceed
* further with the given socket option. This is invoked by sosetoptlock()
* and sogetoptlock().
*/
static int
mptcp_usr_socheckopt(struct socket *mp_so, struct sockopt *sopt)
{
#pragma unused(mp_so)
int error = 0;
VERIFY(sopt->sopt_level == SOL_SOCKET);
/*
* We could check for sopt_dir (set/get) here, but we'll just
* let the caller deal with it as appropriate; therefore the
* following is a superset of the socket options which we
* allow for set/get.
*
* XXX: adi@apple.com
*
* Need to consider the following cases:
*
* a. Certain socket options don't have a clear definition
* on the expected behavior post connect(2). At the time
* those options are issued on the MP socket, there may
* be existing subflow sockets that are already connected.
*/
switch (sopt->sopt_name) {
case SO_LINGER: /* MP */
case SO_LINGER_SEC: /* MP */
case SO_TYPE: /* MP */
case SO_NREAD: /* MP */
case SO_NWRITE: /* MP */
case SO_ERROR: /* MP */
case SO_SNDBUF: /* MP */
case SO_RCVBUF: /* MP */
case SO_SNDLOWAT: /* MP */
case SO_RCVLOWAT: /* MP */
case SO_SNDTIMEO: /* MP */
case SO_RCVTIMEO: /* MP */
case SO_NKE: /* MP */
case SO_NOSIGPIPE: /* MP */
case SO_NOADDRERR: /* MP */
case SO_LABEL: /* MP */
case SO_PEERLABEL: /* MP */
case SO_DEFUNCTIT: /* MP */
case SO_DEFUNCTOK: /* MP */
case SO_ISDEFUNCT: /* MP */
case SO_TRAFFIC_CLASS_DBG: /* MP */
case SO_DELEGATED: /* MP */
case SO_DELEGATED_UUID: /* MP */
#if NECP
case SO_NECP_ATTRIBUTES:
case SO_NECP_CLIENTUUID:
#endif /* NECP */
case SO_MPKL_SEND_INFO:
/*
* Tell the caller that these options are to be processed.
*/
break;
case SO_DEBUG: /* MP + subflow */
case SO_KEEPALIVE: /* MP + subflow */
case SO_USELOOPBACK: /* MP + subflow */
case SO_RANDOMPORT: /* MP + subflow */
case SO_TRAFFIC_CLASS: /* MP + subflow */
case SO_RECV_TRAFFIC_CLASS: /* MP + subflow */
case SO_PRIVILEGED_TRAFFIC_CLASS: /* MP + subflow */
case SO_RECV_ANYIF: /* MP + subflow */
case SO_RESTRICTIONS: /* MP + subflow */
case SO_FLUSH: /* MP + subflow */
case SO_NOWAKEFROMSLEEP:
case SO_NOAPNFALLBK:
case SO_MARK_CELLFALLBACK:
case SO_MARK_CELLFALLBACK_UUID:
case SO_MARK_KNOWN_TRACKER:
case SO_MARK_KNOWN_TRACKER_NON_APP_INITIATED:
case SO_MARK_APPROVED_APP_DOMAIN:
case SO_FALLBACK_MODE:
/*
* Tell the caller that these options are to be processed;
* these will also be recorded later by mptcp_setopt().
*
* NOTE: Only support integer option value for now.
*/
if (sopt->sopt_valsize != sizeof(int)) {
error = EINVAL;
}
break;
default:
/*
* Tell the caller to stop immediately and return an error.
*/
error = ENOPROTOOPT;
break;
}
return error;
}
/*
* Issue SOPT_SET for all MPTCP subflows (for integer option values.)
*/
static int
mptcp_setopt_apply(struct mptses *mpte, struct mptopt *mpo)
{
struct socket *mp_so;
struct mptsub *mpts;
struct mptopt smpo;
int error = 0;
/* just bail now if this isn't applicable to subflow sockets */
if (!(mpo->mpo_flags & MPOF_SUBFLOW_OK)) {
error = ENOPROTOOPT;
goto out;
}
/*
* Skip those that are handled internally; these options
* should not have been recorded and marked with the
* MPOF_SUBFLOW_OK by mptcp_setopt(), but just in case.
*/
if (mpo->mpo_level == SOL_SOCKET &&
(mpo->mpo_name == SO_NOSIGPIPE || mpo->mpo_name == SO_NOADDRERR)) {
error = ENOPROTOOPT;
goto out;
}
mp_so = mptetoso(mpte);
/*
* Don't bother going further if there's no subflow; mark the option
* with MPOF_INTERIM so that we know whether or not to remove this
* option upon encountering an error while issuing it during subflow
* socket creation.
*/
if (mpte->mpte_numflows == 0) {
VERIFY(TAILQ_EMPTY(&mpte->mpte_subflows));
mpo->mpo_flags |= MPOF_INTERIM;
/* return success */
goto out;
}
bzero(&smpo, sizeof(smpo));
smpo.mpo_flags |= MPOF_SUBFLOW_OK;
smpo.mpo_level = mpo->mpo_level;
smpo.mpo_name = mpo->mpo_name;
/* grab exisiting values in case we need to rollback */
TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) {
struct socket *so;
mpts->mpts_flags &= ~(MPTSF_SOPT_OLDVAL | MPTSF_SOPT_INPROG);
mpts->mpts_oldintval = 0;
smpo.mpo_intval = 0;
VERIFY(mpts->mpts_socket != NULL);
so = mpts->mpts_socket;
if (mptcp_subflow_sogetopt(mpte, so, &smpo) == 0) {
mpts->mpts_flags |= MPTSF_SOPT_OLDVAL;
mpts->mpts_oldintval = smpo.mpo_intval;
}
}
/* apply socket option */
TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) {
struct socket *so;
mpts->mpts_flags |= MPTSF_SOPT_INPROG;
VERIFY(mpts->mpts_socket != NULL);
so = mpts->mpts_socket;
error = mptcp_subflow_sosetopt(mpte, mpts, mpo);
if (error != 0) {
break;
}
}
/* cleanup, and rollback if needed */
TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) {
struct socket *so;
if (!(mpts->mpts_flags & MPTSF_SOPT_INPROG)) {
/* clear in case it's set */
mpts->mpts_flags &= ~MPTSF_SOPT_OLDVAL;
mpts->mpts_oldintval = 0;
continue;
}
if (!(mpts->mpts_flags & MPTSF_SOPT_OLDVAL)) {
mpts->mpts_flags &= ~MPTSF_SOPT_INPROG;
VERIFY(mpts->mpts_oldintval == 0);
continue;
}
/* error during sosetopt, so roll it back */
if (error != 0) {
VERIFY(mpts->mpts_socket != NULL);
so = mpts->mpts_socket;
smpo.mpo_intval = mpts->mpts_oldintval;
mptcp_subflow_sosetopt(mpte, mpts, &smpo);
}
mpts->mpts_oldintval = 0;
mpts->mpts_flags &= ~(MPTSF_SOPT_OLDVAL | MPTSF_SOPT_INPROG);
}
out:
return error;
}
/*
* Handle SOPT_SET for socket options issued on MP socket.
*/
static int
mptcp_setopt(struct mptses *mpte, struct sockopt *sopt)
{
int error = 0, optval = 0, level, optname, rec = 1;
struct mptopt smpo, *mpo = NULL;
struct socket *mp_so;
level = sopt->sopt_level;
optname = sopt->sopt_name;
mp_so = mptetoso(mpte);
VERIFY(!(mpsotomppcb(mp_so)->mpp_flags & MPP_INSIDE_SETGETOPT));
mpsotomppcb(mp_so)->mpp_flags |= MPP_INSIDE_SETGETOPT;
/*
* Record socket options which are applicable to subflow sockets so
* that we can replay them for new ones; see mptcp_usr_socheckopt()
* for the list of eligible socket-level options.
*/
if (level == SOL_SOCKET) {
switch (optname) {
case SO_DEBUG:
case SO_KEEPALIVE:
case SO_USELOOPBACK:
case SO_RANDOMPORT:
case SO_TRAFFIC_CLASS:
case SO_RECV_TRAFFIC_CLASS:
case SO_PRIVILEGED_TRAFFIC_CLASS:
case SO_RECV_ANYIF:
case SO_RESTRICTIONS:
case SO_NOWAKEFROMSLEEP:
case SO_NOAPNFALLBK:
case SO_MARK_CELLFALLBACK:
case SO_MARK_KNOWN_TRACKER:
case SO_MARK_KNOWN_TRACKER_NON_APP_INITIATED:
case SO_MARK_APPROVED_APP_DOMAIN:
case SO_FALLBACK_MODE:
/* record it */
break;
case SO_FLUSH:
/* don't record it */
rec = 0;
break;
/* Next ones, record at MPTCP-level */
case SO_DELEGATED:
error = sooptcopyin(sopt, &mpte->mpte_epid,
sizeof(int), sizeof(int));
if (error != 0) {
goto err_out;
}
goto out;
case SO_DELEGATED_UUID:
error = sooptcopyin(sopt, &mpte->mpte_euuid,
sizeof(uuid_t), sizeof(uuid_t));
if (error != 0) {
goto err_out;
}
goto out;
#if NECP
case SO_NECP_CLIENTUUID:
if (!uuid_is_null(mpsotomppcb(mp_so)->necp_client_uuid)) {
error = EINVAL;
goto err_out;
}
error = sooptcopyin(sopt, &mpsotomppcb(mp_so)->necp_client_uuid,
sizeof(uuid_t), sizeof(uuid_t));
if (error != 0) {
goto err_out;
}
mpsotomppcb(mp_so)->necp_cb = mptcp_session_necp_cb;
error = necp_client_register_multipath_cb(mp_so->last_pid,
mpsotomppcb(mp_so)->necp_client_uuid,
mpsotomppcb(mp_so));
if (error) {
goto err_out;
}
if (uuid_is_null(mpsotomppcb(mp_so)->necp_client_uuid)) {
error = EINVAL;
goto err_out;
}
goto out;
case SO_NECP_ATTRIBUTES:
error = necp_set_socket_attributes(&mpsotomppcb(mp_so)->inp_necp_attributes, sopt);
if (error) {
goto err_out;
}
goto out;
#endif /* NECP */
default:
/* nothing to do; just return */
goto out;
}
} else {
switch (optname) {
case TCP_NODELAY:
case TCP_RXT_FINDROP:
case TCP_KEEPALIVE:
case TCP_KEEPINTVL:
case TCP_KEEPCNT:
case TCP_CONNECTIONTIMEOUT:
case TCP_RXT_CONNDROPTIME:
case PERSIST_TIMEOUT:
case TCP_ADAPTIVE_READ_TIMEOUT:
case TCP_ADAPTIVE_WRITE_TIMEOUT:
case TCP_FASTOPEN_FORCE_ENABLE:
/* eligible; record it */
break;
case TCP_NOTSENT_LOWAT:
/* record at MPTCP level */
error = sooptcopyin(sopt, &optval, sizeof(optval),
sizeof(optval));
if (error) {
goto err_out;
}
if (optval < 0) {
error = EINVAL;
goto err_out;
} else {
if (optval == 0) {
mp_so->so_flags &= ~SOF_NOTSENT_LOWAT;
error = mptcp_set_notsent_lowat(mpte, 0);
} else {
mp_so->so_flags |= SOF_NOTSENT_LOWAT;
error = mptcp_set_notsent_lowat(mpte,
optval);
}
if (error) {
goto err_out;
}
}
goto out;
case MPTCP_SERVICE_TYPE:
/* record at MPTCP level */
error = sooptcopyin(sopt, &optval, sizeof(optval),
sizeof(optval));
if (error) {
goto err_out;
}
if (optval < 0 || optval >= MPTCP_SVCTYPE_MAX) {
error = EINVAL;
goto err_out;
}
if (mptcp_entitlement_check(mp_so, (uint8_t)optval) < 0) {
error = EACCES;
goto err_out;
}
mpte->mpte_svctype = (uint8_t)optval;
mpte->mpte_flags |= MPTE_SVCTYPE_CHECKED;
goto out;
case MPTCP_ALTERNATE_PORT:
/* record at MPTCP level */
error = sooptcopyin(sopt, &optval, sizeof(optval),
sizeof(optval));
if (error) {
goto err_out;
}
if (optval < 0 || optval > UINT16_MAX) {
error = EINVAL;
goto err_out;
}
mpte->mpte_alternate_port = (uint16_t)optval;
goto out;
case MPTCP_FORCE_ENABLE:
/* record at MPTCP level */
error = sooptcopyin(sopt, &optval, sizeof(optval),
sizeof(optval));
if (error) {
goto err_out;
}
if (optval < 0 || optval > 1) {
error = EINVAL;
goto err_out;
}
if (optval) {
mpte->mpte_flags |= MPTE_FORCE_ENABLE;
} else {
mpte->mpte_flags &= ~MPTE_FORCE_ENABLE;
}
goto out;
case MPTCP_FORCE_VERSION:
error = sooptcopyin(sopt, &optval, sizeof(optval),
sizeof(optval));
if (error) {
goto err_out;
}
if (optval != 0 && optval != 1) {
error = EINVAL;
goto err_out;
}
if (optval == 0) {
mpte->mpte_flags |= MPTE_FORCE_V0;
mpte->mpte_flags &= ~MPTE_FORCE_V1;
} else {
mpte->mpte_flags |= MPTE_FORCE_V1;
mpte->mpte_flags &= ~MPTE_FORCE_V0;
}
goto out;
case MPTCP_EXPECTED_PROGRESS_TARGET:
{
struct mptcb *mp_tp = mpte->mpte_mptcb;
uint64_t mach_time_target;
uint64_t nanoseconds;
if (mpte->mpte_svctype != MPTCP_SVCTYPE_TARGET_BASED) {
os_log(mptcp_log_handle, "%s - %lx: Can't set urgent activity when svctype is %u\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte), mpte->mpte_svctype);
error = EINVAL;
goto err_out;
}
error = sooptcopyin(sopt, &mach_time_target, sizeof(mach_time_target), sizeof(mach_time_target));
if (error) {
goto err_out;
}
if (!mptcp_ok_to_create_subflows(mp_tp)) {
os_log(mptcp_log_handle, "%s - %lx: Not ok to create subflows, state %u flags %#x\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte), mp_tp->mpt_state, mp_tp->mpt_flags);
error = EINVAL;
goto err_out;
}
if (mach_time_target) {
uint64_t time_now = 0;
uint64_t time_now_nanoseconds;
absolutetime_to_nanoseconds(mach_time_target, &nanoseconds);
nanoseconds = nanoseconds - (mptcp_expected_progress_headstart * NSEC_PER_MSEC);
time_now = mach_continuous_time();
absolutetime_to_nanoseconds(time_now, &time_now_nanoseconds);
nanoseconds_to_absolutetime(nanoseconds, &mach_time_target);
/* If the timer is already running and it would
* fire in less than mptcp_expected_progress_headstart
* seconds, then it's not worth canceling it.
*/
if (mpte->mpte_time_target &&
mpte->mpte_time_target < time_now &&
time_now_nanoseconds > nanoseconds - (mptcp_expected_progress_headstart * NSEC_PER_MSEC)) {
os_log(mptcp_log_handle, "%s - %lx: Not rescheduling timer %llu now %llu target %llu\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte),
mpte->mpte_time_target,
time_now,
mach_time_target);
goto out;
}
}
mpte->mpte_time_target = mach_time_target;
mptcp_set_urgency_timer(mpte);
goto out;
}
default:
/* not eligible */
error = ENOPROTOOPT;
goto err_out;
}
}
if ((error = sooptcopyin(sopt, &optval, sizeof(optval),
sizeof(optval))) != 0) {
goto err_out;
}
if (rec) {
/* search for an existing one; if not found, allocate */
if ((mpo = mptcp_sopt_find(mpte, sopt)) == NULL) {
mpo = mptcp_sopt_alloc(Z_WAITOK);
}
if (mpo == NULL) {
error = ENOBUFS;
goto err_out;
} else {
/* initialize or update, as needed */
mpo->mpo_intval = optval;
if (!(mpo->mpo_flags & MPOF_ATTACHED)) {
mpo->mpo_level = level;
mpo->mpo_name = optname;
mptcp_sopt_insert(mpte, mpo);
}
/* this can be issued on the subflow socket */
mpo->mpo_flags |= MPOF_SUBFLOW_OK;
}
} else {
bzero(&smpo, sizeof(smpo));
mpo = &smpo;
mpo->mpo_flags |= MPOF_SUBFLOW_OK;
mpo->mpo_level = level;
mpo->mpo_name = optname;
mpo->mpo_intval = optval;
}
/* issue this socket option on existing subflows */
error = mptcp_setopt_apply(mpte, mpo);
if (error != 0 && (mpo->mpo_flags & MPOF_ATTACHED)) {
VERIFY(mpo != &smpo);
mptcp_sopt_remove(mpte, mpo);
mptcp_sopt_free(mpo);
}
if (mpo == &smpo) {
mpo->mpo_flags &= ~MPOF_INTERIM;
}
if (error) {
goto err_out;
}
out:
mpsotomppcb(mp_so)->mpp_flags &= ~MPP_INSIDE_SETGETOPT;
return 0;
err_out:
os_log_error(mptcp_log_handle, "%s - %lx: sopt %s (%d, %d) val %d can't be issued error %d\n",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte),
mptcp_sopt2str(level, optname), level, optname, optval, error);
mpsotomppcb(mp_so)->mpp_flags &= ~MPP_INSIDE_SETGETOPT;
return error;
}
static void
mptcp_fill_info_bytestats(struct tcp_info *ti, struct mptses *mpte)
{
struct mptsub *mpts;
int i;
TAILQ_FOREACH(mpts, &mpte->mpte_subflows, mpts_entry) {
const struct inpcb *inp = sotoinpcb(mpts->mpts_socket);
if (inp == NULL) {
continue;
}
ti->tcpi_txbytes += inp->inp_stat->txbytes;
ti->tcpi_rxbytes += inp->inp_stat->rxbytes;
ti->tcpi_cell_txbytes += inp->inp_cstat->txbytes;
ti->tcpi_cell_rxbytes += inp->inp_cstat->rxbytes;
ti->tcpi_wifi_txbytes += inp->inp_wstat->txbytes;
ti->tcpi_wifi_rxbytes += inp->inp_wstat->rxbytes;
ti->tcpi_wired_txbytes += inp->inp_Wstat->txbytes;
ti->tcpi_wired_rxbytes += inp->inp_Wstat->rxbytes;
}
for (i = 0; i < MPTCP_ITFSTATS_SIZE; i++) {
struct mptcp_itf_stats *stats = &mpte->mpte_itfstats[i];
ti->tcpi_txbytes += stats->mpis_txbytes;
ti->tcpi_rxbytes += stats->mpis_rxbytes;
ti->tcpi_wifi_txbytes += stats->mpis_wifi_txbytes;
ti->tcpi_wifi_rxbytes += stats->mpis_wifi_rxbytes;
ti->tcpi_wired_txbytes += stats->mpis_wired_txbytes;
ti->tcpi_wired_rxbytes += stats->mpis_wired_rxbytes;
ti->tcpi_cell_txbytes += stats->mpis_cell_txbytes;
ti->tcpi_cell_rxbytes += stats->mpis_cell_rxbytes;
}
}
static void
mptcp_fill_info(struct mptses *mpte, struct tcp_info *ti)
{
struct mptsub *actsub = mpte->mpte_active_sub;
struct mptcb *mp_tp = mpte->mpte_mptcb;
struct tcpcb *acttp = NULL;
if (actsub) {
acttp = sototcpcb(actsub->mpts_socket);
}
bzero(ti, sizeof(*ti));
ti->tcpi_state = (uint8_t)mp_tp->mpt_state;
/* tcpi_options */
/* tcpi_snd_wscale */
/* tcpi_rcv_wscale */
/* tcpi_flags */
if (acttp) {
ti->tcpi_rto = acttp->t_timer[TCPT_REXMT] ? acttp->t_rxtcur : 0;
}
/* tcpi_snd_mss */
/* tcpi_rcv_mss */
if (acttp) {
ti->tcpi_rttcur = acttp->t_rttcur;
ti->tcpi_srtt = acttp->t_srtt >> TCP_RTT_SHIFT;
ti->tcpi_rttvar = acttp->t_rttvar >> TCP_RTTVAR_SHIFT;
ti->tcpi_rttbest = acttp->t_rttbest >> TCP_RTT_SHIFT;
ti->tcpi_rcv_srtt = acttp->rcv_srtt >> TCP_RTT_SHIFT;
}
/* tcpi_snd_ssthresh */
/* tcpi_snd_cwnd */
/* tcpi_rcv_space */
ti->tcpi_snd_wnd = mp_tp->mpt_sndwnd;
ti->tcpi_snd_nxt = (uint32_t)mp_tp->mpt_sndnxt;
ti->tcpi_rcv_nxt = (uint32_t)mp_tp->mpt_rcvnxt;
if (acttp) {
ti->tcpi_last_outif = (acttp->t_inpcb->inp_last_outifp == NULL) ? 0 :
acttp->t_inpcb->inp_last_outifp->if_index;
}
mptcp_fill_info_bytestats(ti, mpte);
/* tcpi_txpackets */
/* tcpi_txretransmitbytes */
/* tcpi_txunacked */
/* tcpi_rxpackets */
/* tcpi_rxduplicatebytes */
/* tcpi_rxoutoforderbytes */
/* tcpi_snd_bw */
/* tcpi_synrexmits */
/* tcpi_unused1 */
/* tcpi_unused2 */
/* tcpi_cell_rxpackets */
/* tcpi_cell_txpackets */
/* tcpi_wifi_rxpackets */
/* tcpi_wifi_txpackets */
/* tcpi_wired_rxpackets */
/* tcpi_wired_txpackets */
/* tcpi_connstatus */
/* TFO-stuff */
/* ECN stuff */
/* tcpi_ecn_recv_ce */
/* tcpi_ecn_recv_cwr */
if (acttp) {
ti->tcpi_rcvoopack = acttp->t_rcvoopack;
}
/* tcpi_pawsdrop */
/* tcpi_sack_recovery_episode */
/* tcpi_reordered_pkts */
/* tcpi_dsack_sent */
/* tcpi_dsack_recvd */
/* tcpi_flowhash */
if (acttp) {
ti->tcpi_txretransmitpackets = acttp->t_stat.rxmitpkts;
}
}
/*
* Handle SOPT_GET for socket options issued on MP socket.
*/
static int
mptcp_getopt(struct mptses *mpte, struct sockopt *sopt)
{
int error = 0, optval = 0;
struct socket *mp_so;
mp_so = mptetoso(mpte);
VERIFY(!(mpsotomppcb(mp_so)->mpp_flags & MPP_INSIDE_SETGETOPT));
mpsotomppcb(mp_so)->mpp_flags |= MPP_INSIDE_SETGETOPT;
/*
* We only handle SOPT_GET for TCP level socket options; we should
* not get here for socket level options since they are already
* handled at the socket layer.
*/
if (sopt->sopt_level != IPPROTO_TCP) {
error = ENOPROTOOPT;
goto out;
}
switch (sopt->sopt_name) {
case PERSIST_TIMEOUT:
/* Only case for which we have a non-zero default */
optval = tcp_max_persist_timeout;
OS_FALLTHROUGH;
case TCP_NODELAY:
case TCP_RXT_FINDROP:
case TCP_KEEPALIVE:
case TCP_KEEPINTVL:
case TCP_KEEPCNT:
case TCP_CONNECTIONTIMEOUT:
case TCP_RXT_CONNDROPTIME:
case TCP_ADAPTIVE_READ_TIMEOUT:
case TCP_ADAPTIVE_WRITE_TIMEOUT:
case TCP_FASTOPEN_FORCE_ENABLE:
{
struct mptopt *mpo = mptcp_sopt_find(mpte, sopt);
if (mpo != NULL) {
optval = mpo->mpo_intval;
}
break;
}
/* The next ones are stored at the MPTCP-level */
case TCP_NOTSENT_LOWAT:
if (mptetoso(mpte)->so_flags & SOF_NOTSENT_LOWAT) {
optval = mptcp_get_notsent_lowat(mpte);
} else {
optval = 0;
}
break;
case TCP_INFO:
{
struct tcp_info ti;
mptcp_fill_info(mpte, &ti);
error = sooptcopyout(sopt, &ti, sizeof(struct tcp_info));
goto out;
}
case MPTCP_SERVICE_TYPE:
optval = mpte->mpte_svctype;
break;
case MPTCP_ALTERNATE_PORT:
optval = mpte->mpte_alternate_port;
break;
case MPTCP_FORCE_ENABLE:
optval = !!(mpte->mpte_flags & MPTE_FORCE_ENABLE);
break;
case MPTCP_FORCE_VERSION:
if (mpte->mpte_flags & MPTE_FORCE_V0) {
optval = 0;
} else if (mpte->mpte_flags & MPTE_FORCE_V1) {
optval = 1;
} else {
optval = -1;
}
break;
case MPTCP_EXPECTED_PROGRESS_TARGET:
error = sooptcopyout(sopt, &mpte->mpte_time_target, sizeof(mpte->mpte_time_target));
goto out;
default:
/* not eligible */
error = ENOPROTOOPT;
break;
}
if (error == 0) {
error = sooptcopyout(sopt, &optval, sizeof(int));
}
out:
mpsotomppcb(mp_so)->mpp_flags &= ~MPP_INSIDE_SETGETOPT;
return error;
}
/*
* MPTCP SOPT_{SET,GET} socket option handler, for options issued on the MP
* socket, at SOL_SOCKET and IPPROTO_TCP levels. The former is restricted
* to those that are allowed by mptcp_usr_socheckopt().
*/
int
mptcp_ctloutput(struct socket *mp_so, struct sockopt *sopt)
{
struct mppcb *mpp = mpsotomppcb(mp_so);
struct mptses *mpte;
int error = 0;
if (mpp == NULL || mpp->mpp_state == MPPCB_STATE_DEAD) {
error = EINVAL;
goto out;
}
mpte = mptompte(mpp);
socket_lock_assert_owned(mp_so);
/* we only handle socket and TCP-level socket options for MPTCP */
if (sopt->sopt_level != SOL_SOCKET && sopt->sopt_level != IPPROTO_TCP) {
error = EINVAL;
goto out;
}
switch (sopt->sopt_dir) {
case SOPT_SET:
error = mptcp_setopt(mpte, sopt);
break;
case SOPT_GET:
error = mptcp_getopt(mpte, sopt);
break;
}
out:
return error;
}
const char *
mptcp_sopt2str(int level, int optname)
{
switch (level) {
case SOL_SOCKET:
switch (optname) {
case SO_LINGER:
return "SO_LINGER";
case SO_LINGER_SEC:
return "SO_LINGER_SEC";
case SO_DEBUG:
return "SO_DEBUG";
case SO_KEEPALIVE:
return "SO_KEEPALIVE";
case SO_USELOOPBACK:
return "SO_USELOOPBACK";
case SO_TYPE:
return "SO_TYPE";
case SO_NREAD:
return "SO_NREAD";
case SO_NWRITE:
return "SO_NWRITE";
case SO_ERROR:
return "SO_ERROR";
case SO_SNDBUF:
return "SO_SNDBUF";
case SO_RCVBUF:
return "SO_RCVBUF";
case SO_SNDLOWAT:
return "SO_SNDLOWAT";
case SO_RCVLOWAT:
return "SO_RCVLOWAT";
case SO_SNDTIMEO:
return "SO_SNDTIMEO";
case SO_RCVTIMEO:
return "SO_RCVTIMEO";
case SO_NKE:
return "SO_NKE";
case SO_NOSIGPIPE:
return "SO_NOSIGPIPE";
case SO_NOADDRERR:
return "SO_NOADDRERR";
case SO_RESTRICTIONS:
return "SO_RESTRICTIONS";
case SO_LABEL:
return "SO_LABEL";
case SO_PEERLABEL:
return "SO_PEERLABEL";
case SO_RANDOMPORT:
return "SO_RANDOMPORT";
case SO_TRAFFIC_CLASS:
return "SO_TRAFFIC_CLASS";
case SO_RECV_TRAFFIC_CLASS:
return "SO_RECV_TRAFFIC_CLASS";
case SO_TRAFFIC_CLASS_DBG:
return "SO_TRAFFIC_CLASS_DBG";
case SO_PRIVILEGED_TRAFFIC_CLASS:
return "SO_PRIVILEGED_TRAFFIC_CLASS";
case SO_DEFUNCTIT:
return "SO_DEFUNCTIT";
case SO_DEFUNCTOK:
return "SO_DEFUNCTOK";
case SO_ISDEFUNCT:
return "SO_ISDEFUNCT";
case SO_OPPORTUNISTIC:
return "SO_OPPORTUNISTIC";
case SO_FLUSH:
return "SO_FLUSH";
case SO_RECV_ANYIF:
return "SO_RECV_ANYIF";
case SO_NOWAKEFROMSLEEP:
return "SO_NOWAKEFROMSLEEP";
case SO_NOAPNFALLBK:
return "SO_NOAPNFALLBK";
case SO_MARK_CELLFALLBACK:
return "SO_CELLFALLBACK";
case SO_FALLBACK_MODE:
return "SO_FALLBACK_MODE";
case SO_MARK_KNOWN_TRACKER:
return "SO_MARK_KNOWN_TRACKER";
case SO_MARK_KNOWN_TRACKER_NON_APP_INITIATED:
return "SO_MARK_KNOWN_TRACKER_NON_APP_INITIATED";
case SO_MARK_APPROVED_APP_DOMAIN:
return "SO_MARK_APPROVED_APP_DOMAIN";
case SO_DELEGATED:
return "SO_DELEGATED";
case SO_DELEGATED_UUID:
return "SO_DELEGATED_UUID";
#if NECP
case SO_NECP_ATTRIBUTES:
return "SO_NECP_ATTRIBUTES";
case SO_NECP_CLIENTUUID:
return "SO_NECP_CLIENTUUID";
#endif /* NECP */
}
break;
case IPPROTO_TCP:
switch (optname) {
case TCP_NODELAY:
return "TCP_NODELAY";
case TCP_KEEPALIVE:
return "TCP_KEEPALIVE";
case TCP_KEEPINTVL:
return "TCP_KEEPINTVL";
case TCP_KEEPCNT:
return "TCP_KEEPCNT";
case TCP_CONNECTIONTIMEOUT:
return "TCP_CONNECTIONTIMEOUT";
case TCP_RXT_CONNDROPTIME:
return "TCP_RXT_CONNDROPTIME";
case PERSIST_TIMEOUT:
return "PERSIST_TIMEOUT";
case TCP_NOTSENT_LOWAT:
return "NOTSENT_LOWAT";
case TCP_ADAPTIVE_READ_TIMEOUT:
return "ADAPTIVE_READ_TIMEOUT";
case TCP_ADAPTIVE_WRITE_TIMEOUT:
return "ADAPTIVE_WRITE_TIMEOUT";
case TCP_FASTOPEN_FORCE_ENABLE:
return "TCP_FASTOPEN_FORCE_ENABLE";
case MPTCP_SERVICE_TYPE:
return "MPTCP_SERVICE_TYPE";
case MPTCP_ALTERNATE_PORT:
return "MPTCP_ALTERNATE_PORT";
case MPTCP_FORCE_ENABLE:
return "MPTCP_FORCE_ENABLE";
case MPTCP_FORCE_VERSION:
return "MPTCP_FORCE_VERSION";
case MPTCP_EXPECTED_PROGRESS_TARGET:
return "MPTCP_EXPECTED_PROGRESS_TARGET";
}
break;
}
return "unknown";
}
static int
mptcp_usr_preconnect(struct socket *mp_so)
{
struct mptsub *mpts = NULL;
struct mppcb *mpp = mpsotomppcb(mp_so);
struct mptses *mpte;
struct socket *so;
struct tcpcb *tp = NULL;
int error;
mpte = mptompte(mpp);
mpts = mptcp_get_subflow(mpte, NULL);
if (mpts == NULL) {
os_log_error(mptcp_log_handle, "%s - %lx: invalid preconnect ",
__func__, (unsigned long)VM_KERNEL_ADDRPERM(mpte));
return EINVAL;
}
mpts->mpts_flags &= ~MPTSF_TFO_REQD;
so = mpts->mpts_socket;
tp = intotcpcb(sotoinpcb(so));
tp->t_mpflags &= ~TMPF_TFO_REQUEST;
error = tcp_output(sototcpcb(so));
soclearfastopen(mp_so);
return error;
}
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