gstreamer/ext/sctp/usrsctp/usrsctplib/netinet/sctp_userspace.c
Tim-Philipp Müller f4538e24b6 sctp: import internal copy of usrsctp library
There are problems with global shared state and no API stability
guarantees, and we can't rely on distros shipping the fixes we
need. Both firefox and Chrome bundle their own copies too.

Imported from https://github.com/sctplab/usrsctp,
commit 547d3b46c64876c0336b9eef297fda58dbe1adaf
Date: Thu Jul 23 21:49:32 2020 +0200

Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/870

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1465>
2020-08-14 01:32:45 +01:00

406 lines
14 KiB
C

/*-
* 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.
*
*/
#ifdef _WIN32
#include <netinet/sctp_pcb.h>
#include <sys/timeb.h>
#include <iphlpapi.h>
#if !defined(__MINGW32__)
#pragma comment(lib, "IPHLPAPI.lib")
#endif
#endif
#include <netinet/sctp_os_userspace.h>
#if defined(__FreeBSD__)
#include <pthread_np.h>
#endif
#if defined(__linux__)
#include <sys/prctl.h>
#endif
#if defined(_WIN32)
/* Adapter to translate Unix thread start routines to Windows thread start
* routines.
*/
#if defined(__MINGW32__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpedantic"
#endif
static DWORD WINAPI
sctp_create_thread_adapter(void *arg) {
start_routine_t start_routine = (start_routine_t)arg;
return start_routine(NULL) == NULL;
}
int
sctp_userspace_thread_create(userland_thread_t *thread, start_routine_t start_routine)
{
*thread = CreateThread(NULL, 0, sctp_create_thread_adapter,
(void *)start_routine, 0, NULL);
if (*thread == NULL)
return GetLastError();
return 0;
}
#if defined(__MINGW32__)
#pragma GCC diagnostic pop
#endif
#else
int
sctp_userspace_thread_create(userland_thread_t *thread, start_routine_t start_routine)
{
return pthread_create(thread, NULL, start_routine, NULL);
}
#endif
void
sctp_userspace_set_threadname(const char *name)
{
#if defined(__APPLE__)
pthread_setname_np(name);
#endif
#if defined(__linux__)
prctl(PR_SET_NAME, name);
#endif
#if defined(__FreeBSD__)
pthread_set_name_np(pthread_self(), name);
#endif
}
#if !defined(_WIN32) && !defined(__native_client__)
int
sctp_userspace_get_mtu_from_ifn(uint32_t if_index, int af)
{
struct ifreq ifr;
int fd;
memset(&ifr, 0, sizeof(struct ifreq));
if (if_indextoname(if_index, ifr.ifr_name) != NULL) {
/* TODO can I use the raw socket here and not have to open a new one with each query? */
if ((fd = socket(af, SOCK_DGRAM, 0)) < 0)
return (0);
if (ioctl(fd, SIOCGIFMTU, &ifr) < 0) {
close(fd);
return (0);
}
close(fd);
return ifr.ifr_mtu;
} else {
return (0);
}
}
#endif
#if defined(__native_client__)
int
sctp_userspace_get_mtu_from_ifn(uint32_t if_index, int af)
{
return 1280;
}
#endif
#if defined(__APPLE__) || defined(__DragonFly__) || defined(__linux__) || defined(__native_client__) || defined(__NetBSD__) || defined(_WIN32) || defined(__Fuchsia__)
int
timingsafe_bcmp(const void *b1, const void *b2, size_t n)
{
const unsigned char *p1 = b1, *p2 = b2;
int ret = 0;
for (; n > 0; n--)
ret |= *p1++ ^ *p2++;
return (ret != 0);
}
#endif
#ifdef _WIN32
int
sctp_userspace_get_mtu_from_ifn(uint32_t if_index, int af)
{
PIP_ADAPTER_ADDRESSES pAdapterAddrs, pAdapt;
DWORD AdapterAddrsSize, Err;
int ret;
ret = 0;
AdapterAddrsSize = 0;
pAdapterAddrs = NULL;
if ((Err = GetAdaptersAddresses(AF_UNSPEC, 0, NULL, NULL, &AdapterAddrsSize)) != 0) {
if ((Err != ERROR_BUFFER_OVERFLOW) && (Err != ERROR_INSUFFICIENT_BUFFER)) {
SCTPDBG(SCTP_DEBUG_USR, "GetAdaptersAddresses() sizing failed with error code %d, AdapterAddrsSize = %d\n", Err, AdapterAddrsSize);
ret = -1;
goto cleanup;
}
}
if ((pAdapterAddrs = (PIP_ADAPTER_ADDRESSES) GlobalAlloc(GPTR, AdapterAddrsSize)) == NULL) {
SCTPDBG(SCTP_DEBUG_USR, "Memory allocation error!\n");
ret = -1;
goto cleanup;
}
if ((Err = GetAdaptersAddresses(AF_UNSPEC, 0, NULL, pAdapterAddrs, &AdapterAddrsSize)) != ERROR_SUCCESS) {
SCTPDBG(SCTP_DEBUG_USR, "GetAdaptersAddresses() failed with error code %d\n", Err);
ret = -1;
goto cleanup;
}
for (pAdapt = pAdapterAddrs; pAdapt; pAdapt = pAdapt->Next) {
if (pAdapt->IfIndex == if_index) {
ret = pAdapt->Mtu;
break;
}
}
cleanup:
if (pAdapterAddrs != NULL) {
GlobalFree(pAdapterAddrs);
}
return (ret);
}
void
getwintimeofday(struct timeval *tv)
{
FILETIME filetime;
ULARGE_INTEGER ularge;
GetSystemTimeAsFileTime(&filetime);
ularge.LowPart = filetime.dwLowDateTime;
ularge.HighPart = filetime.dwHighDateTime;
/* Change base from Jan 1 1601 00:00:00 to Jan 1 1970 00:00:00 */
#if defined(__MINGW32__)
ularge.QuadPart -= 116444736000000000ULL;
#else
ularge.QuadPart -= 116444736000000000UI64;
#endif
/*
* ularge.QuadPart is now the number of 100-nanosecond intervals
* since Jan 1 1970 00:00:00.
*/
#if defined(__MINGW32__)
tv->tv_sec = (long)(ularge.QuadPart / 10000000ULL);
tv->tv_usec = (long)((ularge.QuadPart % 10000000ULL) / 10ULL);
#else
tv->tv_sec = (long)(ularge.QuadPart / 10000000UI64);
tv->tv_usec = (long)((ularge.QuadPart % 10000000UI64) / 10UI64);
#endif
}
int
win_if_nametoindex(const char *ifname)
{
IP_ADAPTER_ADDRESSES *addresses, *addr;
ULONG status, size;
int index = 0;
if (!ifname) {
return 0;
}
size = 0;
status = GetAdaptersAddresses(AF_UNSPEC, 0, NULL, NULL, &size);
if (status != ERROR_BUFFER_OVERFLOW) {
return 0;
}
addresses = malloc(size);
status = GetAdaptersAddresses(AF_UNSPEC, 0, NULL, addresses, &size);
if (status == ERROR_SUCCESS) {
for (addr = addresses; addr; addr = addr->Next) {
if (addr->AdapterName && !strcmp(ifname, addr->AdapterName)) {
index = addr->IfIndex;
break;
}
}
}
free(addresses);
return index;
}
#if WINVER < 0x0600
/* These functions are written based on the code at
* http://www.cs.wustl.edu/~schmidt/win32-cv-1.html
* Therefore, for the rest of the file the following applies:
*
*
* Copyright and Licensing Information for ACE(TM), TAO(TM), CIAO(TM),
* DAnCE(TM), and CoSMIC(TM)
*
* [1]ACE(TM), [2]TAO(TM), [3]CIAO(TM), DAnCE(TM), and [4]CoSMIC(TM)
* (henceforth referred to as "DOC software") are copyrighted by
* [5]Douglas C. Schmidt and his [6]research group at [7]Washington
* University, [8]University of California, Irvine, and [9]Vanderbilt
* University, Copyright (c) 1993-2012, all rights reserved. Since DOC
* software is open-source, freely available software, you are free to
* use, modify, copy, and distribute--perpetually and irrevocably--the
* DOC software source code and object code produced from the source, as
* well as copy and distribute modified versions of this software. You
* must, however, include this copyright statement along with any code
* built using DOC software that you release. No copyright statement
* needs to be provided if you just ship binary executables of your
* software products.
*
* You can use DOC software in commercial and/or binary software releases
* and are under no obligation to redistribute any of your source code
* that is built using DOC software. Note, however, that you may not
* misappropriate the DOC software code, such as copyrighting it yourself
* or claiming authorship of the DOC software code, in a way that will
* prevent DOC software from being distributed freely using an
* open-source development model. You needn't inform anyone that you're
* using DOC software in your software, though we encourage you to let
* [10]us know so we can promote your project in the [11]DOC software
* success stories.
*
* The [12]ACE, [13]TAO, [14]CIAO, [15]DAnCE, and [16]CoSMIC web sites
* are maintained by the [17]DOC Group at the [18]Institute for Software
* Integrated Systems (ISIS) and the [19]Center for Distributed Object
* Computing of Washington University, St. Louis for the development of
* open-source software as part of the open-source software community.
* Submissions are provided by the submitter ``as is'' with no warranties
* whatsoever, including any warranty of merchantability, noninfringement
* of third party intellectual property, or fitness for any particular
* purpose. In no event shall the submitter be liable for any direct,
* indirect, special, exemplary, punitive, or consequential damages,
* including without limitation, lost profits, even if advised of the
* possibility of such damages. Likewise, DOC software is provided as is
* with no warranties of any kind, including the warranties of design,
* merchantability, and fitness for a particular purpose,
* noninfringement, or arising from a course of dealing, usage or trade
* practice. Washington University, UC Irvine, Vanderbilt University,
* their employees, and students shall have no liability with respect to
* the infringement of copyrights, trade secrets or any patents by DOC
* software or any part thereof. Moreover, in no event will Washington
* University, UC Irvine, or Vanderbilt University, their employees, or
* students be liable for any lost revenue or profits or other special,
* indirect and consequential damages.
*
* DOC software is provided with no support and without any obligation on
* the part of Washington University, UC Irvine, Vanderbilt University,
* their employees, or students to assist in its use, correction,
* modification, or enhancement. A [20]number of companies around the
* world provide commercial support for DOC software, however. DOC
* software is Y2K-compliant, as long as the underlying OS platform is
* Y2K-compliant. Likewise, DOC software is compliant with the new US
* daylight savings rule passed by Congress as "The Energy Policy Act of
* 2005," which established new daylight savings times (DST) rules for
* the United States that expand DST as of March 2007. Since DOC software
* obtains time/date and calendaring information from operating systems
* users will not be affected by the new DST rules as long as they
* upgrade their operating systems accordingly.
*
* The names ACE(TM), TAO(TM), CIAO(TM), DAnCE(TM), CoSMIC(TM),
* Washington University, UC Irvine, and Vanderbilt University, may not
* be used to endorse or promote products or services derived from this
* source without express written permission from Washington University,
* UC Irvine, or Vanderbilt University. This license grants no permission
* to call products or services derived from this source ACE(TM),
* TAO(TM), CIAO(TM), DAnCE(TM), or CoSMIC(TM), nor does it grant
* permission for the name Washington University, UC Irvine, or
* Vanderbilt University to appear in their names.
*
* If you have any suggestions, additions, comments, or questions, please
* let [21]me know.
*
* [22]Douglas C. Schmidt
*
* References
*
* 1. http://www.cs.wustl.edu/~schmidt/ACE.html
* 2. http://www.cs.wustl.edu/~schmidt/TAO.html
* 3. http://www.dre.vanderbilt.edu/CIAO/
* 4. http://www.dre.vanderbilt.edu/cosmic/
* 5. http://www.dre.vanderbilt.edu/~schmidt/
* 6. http://www.cs.wustl.edu/~schmidt/ACE-members.html
* 7. http://www.wustl.edu/
* 8. http://www.uci.edu/
* 9. http://www.vanderbilt.edu/
* 10. mailto:doc_group@cs.wustl.edu
* 11. http://www.cs.wustl.edu/~schmidt/ACE-users.html
* 12. http://www.cs.wustl.edu/~schmidt/ACE.html
* 13. http://www.cs.wustl.edu/~schmidt/TAO.html
* 14. http://www.dre.vanderbilt.edu/CIAO/
* 15. http://www.dre.vanderbilt.edu/~schmidt/DOC_ROOT/DAnCE/
* 16. http://www.dre.vanderbilt.edu/cosmic/
* 17. http://www.dre.vanderbilt.edu/
* 18. http://www.isis.vanderbilt.edu/
* 19. http://www.cs.wustl.edu/~schmidt/doc-center.html
* 20. http://www.cs.wustl.edu/~schmidt/commercial-support.html
* 21. mailto:d.schmidt@vanderbilt.edu
* 22. http://www.dre.vanderbilt.edu/~schmidt/
* 23. http://www.cs.wustl.edu/ACE.html
*/
void
InitializeXPConditionVariable(userland_cond_t *cv)
{
cv->waiters_count = 0;
InitializeCriticalSection(&(cv->waiters_count_lock));
cv->events_[C_SIGNAL] = CreateEvent (NULL, FALSE, FALSE, NULL);
cv->events_[C_BROADCAST] = CreateEvent (NULL, TRUE, FALSE, NULL);
}
void
DeleteXPConditionVariable(userland_cond_t *cv)
{
CloseHandle(cv->events_[C_BROADCAST]);
CloseHandle(cv->events_[C_SIGNAL]);
DeleteCriticalSection(&(cv->waiters_count_lock));
}
int
SleepXPConditionVariable(userland_cond_t *cv, userland_mutex_t *mtx)
{
int result, last_waiter;
EnterCriticalSection(&cv->waiters_count_lock);
cv->waiters_count++;
LeaveCriticalSection(&cv->waiters_count_lock);
LeaveCriticalSection (mtx);
result = WaitForMultipleObjects(2, cv->events_, FALSE, INFINITE);
if (result==-1) {
result = GetLastError();
}
EnterCriticalSection(&cv->waiters_count_lock);
cv->waiters_count--;
last_waiter = result == (C_SIGNAL + C_BROADCAST && (cv->waiters_count == 0));
LeaveCriticalSection(&cv->waiters_count_lock);
if (last_waiter)
ResetEvent(cv->events_[C_BROADCAST]);
EnterCriticalSection (mtx);
return result;
}
void
WakeAllXPConditionVariable(userland_cond_t *cv)
{
int have_waiters;
EnterCriticalSection(&cv->waiters_count_lock);
have_waiters = cv->waiters_count > 0;
LeaveCriticalSection(&cv->waiters_count_lock);
if (have_waiters)
SetEvent (cv->events_[C_BROADCAST]);
}
#endif
#endif