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user_socket.c
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/*-
* Copyright (c) 1982, 1986, 1988, 1990, 1993
* The Regents of the University of California.
* Copyright (c) 2004 The FreeBSD Foundation
* Copyright (c) 2004-2008 Robert N. M. Watson
* Copyright (c) 2009-2010 Brad Penoff
* Copyright (c) 2009-2010 Humaira Kamal
* Copyright (c) 2011-2012 Irene Ruengeler
* Copyright (c) 2011-2012 Michael Tuexen
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
*/
#include <netinet/sctp_os.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_var.h>
#include <netinet/sctp_sysctl.h>
#include <netinet/sctp_input.h>
#include <netinet/sctp_peeloff.h>
#include <netinet/sctp_callout.h>
#include <netinet/sctp_crc32.h>
#ifdef INET6
#include <netinet6/sctp6_var.h>
#endif
#if defined(__FreeBSD__)
#include <sys/param.h>
#endif
#if defined(__linux__)
#define __FAVOR_BSD /* (on Ubuntu at least) enables UDP header field names like BSD in RFC 768 */
#endif
#if !defined(_WIN32)
#if defined INET || defined INET6
#include <netinet/udp.h>
#endif
#include <arpa/inet.h>
#else
#include <user_socketvar.h>
#endif
userland_mutex_t accept_mtx;
userland_cond_t accept_cond;
#ifdef _WIN32
#include <time.h>
#include <sys/timeb.h>
#endif
MALLOC_DEFINE(M_PCB, "sctp_pcb", "sctp pcb");
MALLOC_DEFINE(M_SONAME, "sctp_soname", "sctp soname");
#define MAXLEN_MBUF_CHAIN 32
/* Prototypes */
extern int sctp_sosend(struct socket *so, struct sockaddr *addr, struct uio *uio,
struct mbuf *top, struct mbuf *control, int flags,
/* proc is a dummy in __Userspace__ and will not be passed to sctp_lower_sosend */
struct proc *p);
extern int sctp_attach(struct socket *so, int proto, uint32_t vrf_id);
extern int sctpconn_attach(struct socket *so, int proto, uint32_t vrf_id);
static void init_sync(void) {
#if defined(_WIN32)
#if defined(INET) || defined(INET6)
WSADATA wsaData;
if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) {
SCTP_PRINTF("WSAStartup failed\n");
exit (-1);
}
#endif
InitializeConditionVariable(&accept_cond);
InitializeCriticalSection(&accept_mtx);
#else
pthread_mutexattr_t mutex_attr;
pthread_mutexattr_init(&mutex_attr);
#ifdef INVARIANTS
pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_ERRORCHECK);
#endif
pthread_mutex_init(&accept_mtx, &mutex_attr);
pthread_mutexattr_destroy(&mutex_attr);
pthread_cond_init(&accept_cond, NULL);
#endif
}
void
usrsctp_init(uint16_t port,
int (*conn_output)(void *addr, void *buffer, size_t length, uint8_t tos, uint8_t set_df),
void (*debug_printf)(const char *format, ...))
{
init_sync();
sctp_init(port, conn_output, debug_printf, 1);
}
void
usrsctp_init_nothreads(uint16_t port,
int (*conn_output)(void *addr, void *buffer, size_t length, uint8_t tos, uint8_t set_df),
void (*debug_printf)(const char *format, ...))
{
init_sync();
sctp_init(port, conn_output, debug_printf, 0);
}
/* Taken from usr/src/sys/kern/uipc_sockbuf.c and modified for __Userspace__*/
/*
* Socantsendmore indicates that no more data will be sent on the socket; it
* would normally be applied to a socket when the user informs the system
* that no more data is to be sent, by the protocol code (in case
* PRU_SHUTDOWN). Socantrcvmore indicates that no more data will be
* received, and will normally be applied to the socket by a protocol when it
* detects that the peer will send no more data. Data queued for reading in
* the socket may yet be read.
*/
void socantrcvmore_locked(struct socket *so)
{
SOCKBUF_LOCK_ASSERT(&so->so_rcv);
so->so_rcv.sb_state |= SBS_CANTRCVMORE;
sorwakeup_locked(so);
}
void socantrcvmore(struct socket *so)
{
SOCKBUF_LOCK(&so->so_rcv);
socantrcvmore_locked(so);
}
void
socantsendmore_locked(struct socket *so)
{
SOCKBUF_LOCK_ASSERT(&so->so_snd);
so->so_snd.sb_state |= SBS_CANTSENDMORE;
sowwakeup_locked(so);
}
void
socantsendmore(struct socket *so)
{
SOCKBUF_LOCK(&so->so_snd);
socantsendmore_locked(so);
}
/* Taken from usr/src/sys/kern/uipc_sockbuf.c and called within sctp_lower_sosend.
*/
int
sbwait(struct sockbuf *sb)
{
SOCKBUF_LOCK_ASSERT(sb);
sb->sb_flags |= SB_WAIT;
#if defined(_WIN32)
if (SleepConditionVariableCS(&(sb->sb_cond), &(sb->sb_mtx), INFINITE))
return (0);
else
return (-1);
#else
return (pthread_cond_wait(&(sb->sb_cond), &(sb->sb_mtx)));
#endif
}
/* Taken from /src/sys/kern/uipc_socket.c
* and modified for __Userspace__
*/
static struct socket *
soalloc(void)
{
struct socket *so;
/*
* soalloc() sets of socket layer state for a socket,
* called only by socreate() and sonewconn().
*
* sodealloc() tears down socket layer state for a socket,
* called only by sofree() and sonewconn().
* __Userspace__ TODO : Make sure so is properly deallocated
* when tearing down the connection.
*/
so = (struct socket *)malloc(sizeof(struct socket));
if (so == NULL) {
return (NULL);
}
memset(so, 0, sizeof(struct socket));
/* __Userspace__ Initializing the socket locks here */
SOCKBUF_LOCK_INIT(&so->so_snd, "so_snd");
SOCKBUF_LOCK_INIT(&so->so_rcv, "so_rcv");
SOCKBUF_COND_INIT(&so->so_snd);
SOCKBUF_COND_INIT(&so->so_rcv);
SOCK_COND_INIT(so); /* timeo_cond */
/* __Userspace__ Any ref counting required here? Will we have any use for aiojobq?
What about gencnt and numopensockets?*/
TAILQ_INIT(&so->so_aiojobq);
return (so);
}
static void
sodealloc(struct socket *so)
{
KASSERT(so->so_count == 0, ("sodealloc(): so_count %d", so->so_count));
KASSERT(so->so_pcb == NULL, ("sodealloc(): so_pcb != NULL"));
SOCKBUF_COND_DESTROY(&so->so_snd);
SOCKBUF_COND_DESTROY(&so->so_rcv);
SOCK_COND_DESTROY(so);
SOCKBUF_LOCK_DESTROY(&so->so_snd);
SOCKBUF_LOCK_DESTROY(&so->so_rcv);
free(so);
}
/* Taken from /src/sys/kern/uipc_socket.c
* and modified for __Userspace__
*/
void
sofree(struct socket *so)
{
struct socket *head;
ACCEPT_LOCK_ASSERT();
SOCK_LOCK_ASSERT(so);
/* SS_NOFDREF unset in accept call. this condition seems irrelevant
* for __Userspace__...
*/
if (so->so_count != 0 ||
(so->so_state & SS_PROTOREF) || (so->so_qstate & SQ_COMP)) {
SOCK_UNLOCK(so);
ACCEPT_UNLOCK();
return;
}
head = so->so_head;
if (head != NULL) {
KASSERT((so->so_qstate & SQ_COMP) != 0 ||
(so->so_qstate & SQ_INCOMP) != 0,
("sofree: so_head != NULL, but neither SQ_COMP nor "
"SQ_INCOMP"));
KASSERT((so->so_qstate & SQ_COMP) == 0 ||
(so->so_qstate & SQ_INCOMP) == 0,
("sofree: so->so_qstate is SQ_COMP and also SQ_INCOMP"));
TAILQ_REMOVE(&head->so_incomp, so, so_list);
head->so_incqlen--;
so->so_qstate &= ~SQ_INCOMP;
so->so_head = NULL;
}
KASSERT((so->so_qstate & SQ_COMP) == 0 &&
(so->so_qstate & SQ_INCOMP) == 0,
("sofree: so_head == NULL, but still SQ_COMP(%d) or SQ_INCOMP(%d)",
so->so_qstate & SQ_COMP, so->so_qstate & SQ_INCOMP));
if (so->so_options & SCTP_SO_ACCEPTCONN) {
KASSERT((TAILQ_EMPTY(&so->so_comp)), ("sofree: so_comp populated"));
KASSERT((TAILQ_EMPTY(&so->so_incomp)), ("sofree: so_comp populated"));
}
SOCK_UNLOCK(so);
ACCEPT_UNLOCK();
sctp_close(so); /* was... sctp_detach(so); */
/*
* From this point on, we assume that no other references to this
* socket exist anywhere else in the stack. Therefore, no locks need
* to be acquired or held.
*
* We used to do a lot of socket buffer and socket locking here, as
* well as invoke sorflush() and perform wakeups. The direct call to
* dom_dispose() and sbrelease_internal() are an inlining of what was
* necessary from sorflush().
*
* Notice that the socket buffer and kqueue state are torn down
* before calling pru_detach. This means that protocols should not
* assume they can perform socket wakeups, etc, in their detach code.
*/
sodealloc(so);
}
/* Taken from /src/sys/kern/uipc_socket.c */
void
soabort(struct socket *so)
{
sctp_abort(so);
ACCEPT_LOCK();
SOCK_LOCK(so);
sofree(so);
}
/* Taken from usr/src/sys/kern/uipc_socket.c and called within sctp_connect (sctp_usrreq.c).
* We use sctp_connect for send_one_init_real in ms1.
*/
void
soisconnecting(struct socket *so)
{
SOCK_LOCK(so);
so->so_state &= ~(SS_ISCONNECTED|SS_ISDISCONNECTING);
so->so_state |= SS_ISCONNECTING;
SOCK_UNLOCK(so);
}
/* Taken from usr/src/sys/kern/uipc_socket.c and called within sctp_disconnect (sctp_usrreq.c).
* TODO Do we use sctp_disconnect?
*/
void
soisdisconnecting(struct socket *so)
{
/*
* Note: This code assumes that SOCK_LOCK(so) and
* SOCKBUF_LOCK(&so->so_rcv) are the same.
*/
SOCKBUF_LOCK(&so->so_rcv);
so->so_state &= ~SS_ISCONNECTING;
so->so_state |= SS_ISDISCONNECTING;
so->so_rcv.sb_state |= SBS_CANTRCVMORE;
sorwakeup_locked(so);
SOCKBUF_LOCK(&so->so_snd);
so->so_snd.sb_state |= SBS_CANTSENDMORE;
sowwakeup_locked(so);
wakeup("dummy",so);
/* requires 2 args but this was in orig */
/* wakeup(&so->so_timeo); */
}
/* Taken from sys/kern/kern_synch.c and
modified for __Userspace__
*/
/*
* Make all threads sleeping on the specified identifier runnable.
* Associating wakeup with so_timeo identifier and timeo_cond
* condition variable. TODO. If we use iterator thread then we need to
* modify wakeup so it can distinguish between iterator identifier and
* timeo identifier.
*/
void
wakeup(void *ident, struct socket *so)
{
SOCK_LOCK(so);
#if defined(_WIN32)
WakeAllConditionVariable(&(so)->timeo_cond);
#else
pthread_cond_broadcast(&(so)->timeo_cond);
#endif
SOCK_UNLOCK(so);
}
/*
* Make a thread sleeping on the specified identifier runnable.
* May wake more than one thread if a target thread is currently
* swapped out.
*/
void
wakeup_one(void *ident)
{
/* __Userspace__ Check: We are using accept_cond for wakeup_one.
It seems that wakeup_one is only called within
soisconnected() and sonewconn() with ident &head->so_timeo
head is so->so_head, which is back pointer to listen socket
This seems to indicate that the use of accept_cond is correct
since socket where accepts occur is so_head in all
subsidiary sockets.
*/
ACCEPT_LOCK();
#if defined(_WIN32)
WakeAllConditionVariable(&accept_cond);
#else
pthread_cond_broadcast(&accept_cond);
#endif
ACCEPT_UNLOCK();
}
/* Called within sctp_process_cookie_[existing/new] */
void
soisconnected(struct socket *so)
{
struct socket *head;
ACCEPT_LOCK();
SOCK_LOCK(so);
so->so_state &= ~(SS_ISCONNECTING|SS_ISDISCONNECTING|SS_ISCONFIRMING);
so->so_state |= SS_ISCONNECTED;
head = so->so_head;
if (head != NULL && (so->so_qstate & SQ_INCOMP)) {
SOCK_UNLOCK(so);
TAILQ_REMOVE(&head->so_incomp, so, so_list);
head->so_incqlen--;
so->so_qstate &= ~SQ_INCOMP;
TAILQ_INSERT_TAIL(&head->so_comp, so, so_list);
head->so_qlen++;
so->so_qstate |= SQ_COMP;
ACCEPT_UNLOCK();
sorwakeup(head);
wakeup_one(&head->so_timeo);
return;
}
SOCK_UNLOCK(so);
ACCEPT_UNLOCK();
wakeup(&so->so_timeo, so);
sorwakeup(so);
sowwakeup(so);
}
/* called within sctp_handle_cookie_echo */
struct socket *
sonewconn(struct socket *head, int connstatus)
{
struct socket *so;
int over;
ACCEPT_LOCK();
over = (head->so_qlen > 3 * head->so_qlimit / 2);
ACCEPT_UNLOCK();
#ifdef REGRESSION
if (regression_sonewconn_earlytest && over)
#else
if (over)
#endif
return (NULL);
so = soalloc();
if (so == NULL)
return (NULL);
so->so_head = head;
so->so_type = head->so_type;
so->so_options = head->so_options &~ SCTP_SO_ACCEPTCONN;
so->so_linger = head->so_linger;
so->so_state = head->so_state | SS_NOFDREF;
so->so_dom = head->so_dom;
#ifdef MAC
SOCK_LOCK(head);
mac_create_socket_from_socket(head, so);
SOCK_UNLOCK(head);
#endif
if (soreserve(so, head->so_snd.sb_hiwat, head->so_rcv.sb_hiwat)) {
sodealloc(so);
return (NULL);
}
switch (head->so_dom) {
#ifdef INET
case AF_INET:
if (sctp_attach(so, IPPROTO_SCTP, SCTP_DEFAULT_VRFID)) {
sodealloc(so);
return (NULL);
}
break;
#endif
#ifdef INET6
case AF_INET6:
if (sctp6_attach(so, IPPROTO_SCTP, SCTP_DEFAULT_VRFID)) {
sodealloc(so);
return (NULL);
}
break;
#endif
case AF_CONN:
if (sctpconn_attach(so, IPPROTO_SCTP, SCTP_DEFAULT_VRFID)) {
sodealloc(so);
return (NULL);
}
break;
default:
sodealloc(so);
return (NULL);
break;
}
so->so_rcv.sb_lowat = head->so_rcv.sb_lowat;
so->so_snd.sb_lowat = head->so_snd.sb_lowat;
so->so_rcv.sb_timeo = head->so_rcv.sb_timeo;
so->so_snd.sb_timeo = head->so_snd.sb_timeo;
so->so_rcv.sb_flags |= head->so_rcv.sb_flags & SB_AUTOSIZE;
so->so_snd.sb_flags |= head->so_snd.sb_flags & SB_AUTOSIZE;
so->so_state |= connstatus;
ACCEPT_LOCK();
if (connstatus) {
TAILQ_INSERT_TAIL(&head->so_comp, so, so_list);
so->so_qstate |= SQ_COMP;
head->so_qlen++;
} else {
/*
* Keep removing sockets from the head until there's room for
* us to insert on the tail. In pre-locking revisions, this
* was a simple if (), but as we could be racing with other
* threads and soabort() requires dropping locks, we must
* loop waiting for the condition to be true.
*/
while (head->so_incqlen > head->so_qlimit) {
struct socket *sp;
sp = TAILQ_FIRST(&head->so_incomp);
TAILQ_REMOVE(&head->so_incomp, sp, so_list);
head->so_incqlen--;
sp->so_qstate &= ~SQ_INCOMP;
sp->so_head = NULL;
ACCEPT_UNLOCK();
soabort(sp);
ACCEPT_LOCK();
}
TAILQ_INSERT_TAIL(&head->so_incomp, so, so_list);
so->so_qstate |= SQ_INCOMP;
head->so_incqlen++;
}
ACCEPT_UNLOCK();
if (connstatus) {
sorwakeup(head);
wakeup_one(&head->so_timeo);
}
return (so);
}
/*
Source: /src/sys/gnu/fs/xfs/FreeBSD/xfs_ioctl.c
*/
static __inline__ int
copy_to_user(void *dst, void *src, size_t len) {
memcpy(dst, src, len);
return 0;
}
static __inline__ int
copy_from_user(void *dst, void *src, size_t len) {
memcpy(dst, src, len);
return 0;
}
/*
References:
src/sys/dev/lmc/if_lmc.h:
src/sys/powerpc/powerpc/copyinout.c
src/sys/sys/systm.h
*/
# define copyin(u, k, len) copy_from_user(k, u, len)
/* References:
src/sys/powerpc/powerpc/copyinout.c
src/sys/sys/systm.h
*/
# define copyout(k, u, len) copy_to_user(u, k, len)
/* copyiniov definition copied/modified from src/sys/kern/kern_subr.c */
int
copyiniov(struct iovec *iovp, u_int iovcnt, struct iovec **iov, int error)
{
u_int iovlen;
*iov = NULL;
if (iovcnt > UIO_MAXIOV)
return (error);
iovlen = iovcnt * sizeof (struct iovec);
*iov = malloc(iovlen); /*, M_IOV, M_WAITOK); */
error = copyin(iovp, *iov, iovlen);
if (error) {
free(*iov); /*, M_IOV); */
*iov = NULL;
}
return (error);
}
/* (__Userspace__) version of uiomove */
int
uiomove(void *cp, int n, struct uio *uio)
{
struct iovec *iov;
size_t cnt;
int error = 0;
if ((uio->uio_rw != UIO_READ) &&
(uio->uio_rw != UIO_WRITE)) {
return (EINVAL);
}
while (n > 0 && uio->uio_resid) {
iov = uio->uio_iov;
cnt = iov->iov_len;
if (cnt == 0) {
uio->uio_iov++;
uio->uio_iovcnt--;
continue;
}
if (cnt > (size_t)n)
cnt = n;
switch (uio->uio_segflg) {
case UIO_USERSPACE:
if (uio->uio_rw == UIO_READ)
error = copyout(cp, iov->iov_base, cnt);
else
error = copyin(iov->iov_base, cp, cnt);
if (error)
goto out;
break;
case UIO_SYSSPACE:
if (uio->uio_rw == UIO_READ)
memcpy(iov->iov_base, cp, cnt);
else
memcpy(cp, iov->iov_base, cnt);
break;
}
iov->iov_base = (char *)iov->iov_base + cnt;
iov->iov_len -= cnt;
uio->uio_resid -= cnt;
uio->uio_offset += (off_t)cnt;
cp = (char *)cp + cnt;
n -= (int)cnt;
}
out:
return (error);
}
/* Source: src/sys/kern/uipc_syscalls.c */
int
getsockaddr(struct sockaddr **namp, caddr_t uaddr, size_t len)
{
struct sockaddr *sa;
int error;
if (len > SOCK_MAXADDRLEN)
return (ENAMETOOLONG);
if (len < offsetof(struct sockaddr, sa_data))
return (EINVAL);
MALLOC(sa, struct sockaddr *, len, M_SONAME, M_WAITOK);
error = copyin(uaddr, sa, len);
if (error) {
FREE(sa, M_SONAME);
} else {
#ifdef HAVE_SA_LEN
sa->sa_len = len;
#endif
*namp = sa;
}
return (error);
}
int
usrsctp_getsockopt(struct socket *so, int level, int option_name,
void *option_value, socklen_t *option_len);
sctp_assoc_t
usrsctp_getassocid(struct socket *sock, struct sockaddr *sa)
{
struct sctp_paddrinfo sp;
socklen_t siz;
#ifndef HAVE_SA_LEN
size_t sa_len;
#endif
/* First get the assoc id */
siz = sizeof(sp);
memset(&sp, 0, sizeof(sp));
#ifdef HAVE_SA_LEN
memcpy((caddr_t)&sp.spinfo_address, sa, sa->sa_len);
#else
switch (sa->sa_family) {
#ifdef INET
case AF_INET:
sa_len = sizeof(struct sockaddr_in);
break;
#endif
#ifdef INET6
case AF_INET6:
sa_len = sizeof(struct sockaddr_in6);
break;
#endif
case AF_CONN:
sa_len = sizeof(struct sockaddr_conn);
break;
default:
sa_len = 0;
break;
}
memcpy((caddr_t)&sp.spinfo_address, sa, sa_len);
#endif
if (usrsctp_getsockopt(sock, IPPROTO_SCTP, SCTP_GET_PEER_ADDR_INFO, &sp, &siz) != 0) {
/* We depend on the fact that 0 can never be returned */
return ((sctp_assoc_t) 0);
}
return (sp.spinfo_assoc_id);
}
/* Taken from /src/lib/libc/net/sctp_sys_calls.c
* and modified for __Userspace__
* calling sctp_generic_sendmsg from this function
*/
ssize_t
userspace_sctp_sendmsg(struct socket *so,
const void *data,
size_t len,
struct sockaddr *to,
socklen_t tolen,
uint32_t ppid,
uint32_t flags,
uint16_t stream_no,
uint32_t timetolive,
uint32_t context)
{
struct sctp_sndrcvinfo sndrcvinfo, *sinfo = &sndrcvinfo;
struct uio auio;
struct iovec iov[1];
memset(sinfo, 0, sizeof(struct sctp_sndrcvinfo));
sinfo->sinfo_ppid = ppid;
sinfo->sinfo_flags = flags;
sinfo->sinfo_stream = stream_no;
sinfo->sinfo_timetolive = timetolive;
sinfo->sinfo_context = context;
sinfo->sinfo_assoc_id = 0;
/* Perform error checks on destination (to) */
if (tolen > SOCK_MAXADDRLEN) {
errno = ENAMETOOLONG;
return (-1);
}
if ((tolen > 0) &&
((to == NULL) || (tolen < (socklen_t)sizeof(struct sockaddr)))) {
errno = EINVAL;
return (-1);
}
if (data == NULL) {
errno = EFAULT;
return (-1);
}
/* Adding the following as part of defensive programming, in case the application
does not do it when preparing the destination address.*/
#ifdef HAVE_SA_LEN
if (to != NULL) {
to->sa_len = tolen;
}
#endif
iov[0].iov_base = (caddr_t)data;
iov[0].iov_len = len;
auio.uio_iov = iov;
auio.uio_iovcnt = 1;
auio.uio_segflg = UIO_USERSPACE;
auio.uio_rw = UIO_WRITE;
auio.uio_offset = 0; /* XXX */
auio.uio_resid = len;
errno = sctp_lower_sosend(so, to, &auio, NULL, NULL, 0, sinfo);
if (errno == 0) {
return (len - auio.uio_resid);
} else {
return (-1);
}
}
ssize_t
usrsctp_sendv(struct socket *so,
const void *data,
size_t len,
struct sockaddr *to,
int addrcnt,
void *info,
socklen_t infolen,
unsigned int infotype,
int flags)
{
struct sctp_sndrcvinfo sinfo;
struct uio auio;
struct iovec iov[1];
int use_sinfo;
sctp_assoc_t *assoc_id;
if (so == NULL) {
errno = EBADF;
return (-1);
}
if (data == NULL) {
errno = EFAULT;
return (-1);
}
memset(&sinfo, 0, sizeof(struct sctp_sndrcvinfo));
assoc_id = NULL;
use_sinfo = 0;
switch (infotype) {
case SCTP_SENDV_NOINFO:
if ((infolen != 0) || (info != NULL)) {
errno = EINVAL;
return (-1);
}
break;
case SCTP_SENDV_SNDINFO:
if ((info == NULL) || (infolen != sizeof(struct sctp_sndinfo))) {
errno = EINVAL;
return (-1);
}
sinfo.sinfo_stream = ((struct sctp_sndinfo *)info)->snd_sid;
sinfo.sinfo_flags = ((struct sctp_sndinfo *)info)->snd_flags;
sinfo.sinfo_ppid = ((struct sctp_sndinfo *)info)->snd_ppid;
sinfo.sinfo_context = ((struct sctp_sndinfo *)info)->snd_context;
sinfo.sinfo_assoc_id = ((struct sctp_sndinfo *)info)->snd_assoc_id;
assoc_id = &(((struct sctp_sndinfo *)info)->snd_assoc_id);
use_sinfo = 1;
break;
case SCTP_SENDV_PRINFO:
if ((info == NULL) || (infolen != sizeof(struct sctp_prinfo))) {
errno = EINVAL;
return (-1);
}
sinfo.sinfo_stream = 0;
sinfo.sinfo_flags = PR_SCTP_POLICY(((struct sctp_prinfo *)info)->pr_policy);
sinfo.sinfo_timetolive = ((struct sctp_prinfo *)info)->pr_value;
use_sinfo = 1;
break;
case SCTP_SENDV_AUTHINFO:
errno = EINVAL;
return (-1);
case SCTP_SENDV_SPA:
if ((info == NULL) || (infolen != sizeof(struct sctp_sendv_spa))) {
errno = EINVAL;
return (-1);
}
if (((struct sctp_sendv_spa *)info)->sendv_flags & SCTP_SEND_SNDINFO_VALID) {
sinfo.sinfo_stream = ((struct sctp_sendv_spa *)info)->sendv_sndinfo.snd_sid;
sinfo.sinfo_flags = ((struct sctp_sendv_spa *)info)->sendv_sndinfo.snd_flags;
sinfo.sinfo_ppid = ((struct sctp_sendv_spa *)info)->sendv_sndinfo.snd_ppid;
sinfo.sinfo_context = ((struct sctp_sendv_spa *)info)->sendv_sndinfo.snd_context;
sinfo.sinfo_assoc_id = ((struct sctp_sendv_spa *)info)->sendv_sndinfo.snd_assoc_id;
assoc_id = &(((struct sctp_sendv_spa *)info)->sendv_sndinfo.snd_assoc_id);
} else {
sinfo.sinfo_flags = 0;
sinfo.sinfo_stream = 0;
}
if (((struct sctp_sendv_spa *)info)->sendv_flags & SCTP_SEND_PRINFO_VALID) {
sinfo.sinfo_flags |= PR_SCTP_POLICY(((struct sctp_sendv_spa *)info)->sendv_prinfo.pr_policy);
sinfo.sinfo_timetolive = ((struct sctp_sendv_spa *)info)->sendv_prinfo.pr_value;
}
if (((struct sctp_sendv_spa *)info)->sendv_flags & SCTP_SEND_AUTHINFO_VALID) {
errno = EINVAL;
return (-1);
}
use_sinfo = 1;
break;
default:
errno = EINVAL;
return (-1);
}
/* Perform error checks on destination (to) */
if (addrcnt > 1) {
errno = EINVAL;
return (-1);
}
iov[0].iov_base = (caddr_t)data;
iov[0].iov_len = len;
auio.uio_iov = iov;
auio.uio_iovcnt = 1;
auio.uio_segflg = UIO_USERSPACE;
auio.uio_rw = UIO_WRITE;
auio.uio_offset = 0; /* XXX */
auio.uio_resid = len;
errno = sctp_lower_sosend(so, to, &auio, NULL, NULL, flags, use_sinfo ? &sinfo : NULL);
if (errno == 0) {
if ((to != NULL) && (assoc_id != NULL)) {
*assoc_id = usrsctp_getassocid(so, to);
}
return (len - auio.uio_resid);
} else {
return (-1);
}
}
ssize_t
userspace_sctp_sendmbuf(struct socket *so,
struct mbuf* mbufdata,
size_t len,
struct sockaddr *to,
socklen_t tolen,
uint32_t ppid,
uint32_t flags,
uint16_t stream_no,
uint32_t timetolive,
uint32_t context)
{
struct sctp_sndrcvinfo sndrcvinfo, *sinfo = &sndrcvinfo;
/* struct uio auio;
struct iovec iov[1]; */
int error = 0;
int uflags = 0;
ssize_t retval;
sinfo->sinfo_ppid = ppid;
sinfo->sinfo_flags = flags;
sinfo->sinfo_stream = stream_no;
sinfo->sinfo_timetolive = timetolive;
sinfo->sinfo_context = context;
sinfo->sinfo_assoc_id = 0;
/* Perform error checks on destination (to) */
if (tolen > SOCK_MAXADDRLEN){
error = (ENAMETOOLONG);
goto sendmsg_return;
}
if (tolen < (socklen_t)offsetof(struct sockaddr, sa_data)){
error = (EINVAL);
goto sendmsg_return;
}
/* Adding the following as part of defensive programming, in case the application
does not do it when preparing the destination address.*/
#ifdef HAVE_SA_LEN
to->sa_len = tolen;
#endif
error = sctp_lower_sosend(so, to, NULL/*uio*/,
(struct mbuf *)mbufdata, (struct mbuf *)NULL,
uflags, sinfo);
sendmsg_return:
/* TODO: Needs a condition for non-blocking when error is EWOULDBLOCK */
if (0 == error)
retval = len;
else if (error == EWOULDBLOCK) {
errno = EWOULDBLOCK;
retval = -1;
} else {
SCTP_PRINTF("%s: error = %d\n", __func__, error);
errno = error;
retval = -1;
}
return (retval);
}
/* taken from usr.lib/sctp_sys_calls.c and needed here */
#define SCTP_SMALL_IOVEC_SIZE 2
/* Taken from /src/lib/libc/net/sctp_sys_calls.c
* and modified for __Userspace__
* calling sctp_generic_recvmsg from this function
*/
ssize_t
userspace_sctp_recvmsg(struct socket *so,
void *dbuf,
size_t len,
struct sockaddr *from,
socklen_t *fromlenp,
struct sctp_sndrcvinfo *sinfo,
int *msg_flags)
{
struct uio auio;
struct iovec iov[SCTP_SMALL_IOVEC_SIZE];
struct iovec *tiov;
int iovlen = 1;
int error = 0;
ssize_t ulen;
int i;
socklen_t fromlen;
iov[0].iov_base = dbuf;
iov[0].iov_len = len;
auio.uio_iov = iov;
auio.uio_iovcnt = iovlen;
auio.uio_segflg = UIO_USERSPACE;
auio.uio_rw = UIO_READ;
auio.uio_offset = 0; /* XXX */