mirror of https://gerrit.osmocom.org/libosmocore
libosmocore libusb integration
Osmocom applications typically use libosmocore select.[ch] event loop code as their main event dispatch mechanism. When they want to deal with libusb in a non-blocking/asynchronous way, they need to integrate libusb into that select(). The new libosmousb is doing exactly that: Providing a shared utility library for Osmocom programs that wish to use libusb. This is useful for example in simtrace2 host utilitie as well as osmo-e1d. Change-Id: I656a1a38cbb5b1f3a9145d2869d3b4d0adefcae3 Closes: OS#4299
This commit is contained in:
parent
7d0fe2ae6f
commit
da432cdc35
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@ -1,11 +1,12 @@
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ACLOCAL_AMFLAGS = -I m4
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AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include
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SUBDIRS = include src src/vty src/codec src/gsm src/coding src/gb src/ctrl src/sim src/pseudotalloc utils tests
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SUBDIRS = include src src/vty src/codec src/gsm src/coding src/gb src/ctrl src/sim src/pseudotalloc src/usb utils tests
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pkgconfigdir = $(libdir)/pkgconfig
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pkgconfig_DATA = libosmocore.pc libosmocodec.pc libosmovty.pc libosmogsm.pc \
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libosmogb.pc libosmoctrl.pc libosmocoding.pc libosmosim.pc
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libosmogb.pc libosmoctrl.pc libosmocoding.pc libosmosim.pc \
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libosmousb.pc
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aclocaldir = $(datadir)/aclocal
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dist_aclocal_DATA = m4/osmo_ac_code_coverage.m4 \
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15
configure.ac
15
configure.ac
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@ -146,6 +146,19 @@ AS_IF([test "x$ENABLE_PCSC" = "xyes"], [
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AM_CONDITIONAL(ENABLE_PCSC, test "x$ENABLE_PCSC" = "xyes")
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AC_SUBST(ENABLE_PCSC)
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AC_ARG_ENABLE([libusb], [AS_HELP_STRING([--disable-libusb], [Build without libusb support])],
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[
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ENABLE_LIBUSB=$enableval
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],
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[
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ENABLE_LIBUSB="yes"
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])
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AS_IF([test "x$ENABLE_LIBUSB" = "xyes"], [
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PKG_CHECK_MODULES(LIBUSB, libusb-1.0)
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])
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AM_CONDITIONAL(ENABLE_LIBUSB, test "x$ENABLE_LIBUSB" = "xyes")
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AC_SUBST(ENABLE_LIBUSB)
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AC_ARG_ENABLE([gnutls], [AS_HELP_STRING([--disable-gnutls], [Do not use GnuTLS fallback for missing getrandom()])],
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[ENABLE_GNUTLS=$enableval], [ENABLE_GNUTLS="yes"])
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AM_CONDITIONAL(ENABLE_GNUTLS, test x"$ENABLE_GNUTLS" = x"yes")
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@ -398,12 +411,14 @@ AC_OUTPUT(
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libosmogb.pc
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libosmoctrl.pc
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libosmosim.pc
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libosmousb.pc
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include/Makefile
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src/Makefile
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src/vty/Makefile
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src/codec/Makefile
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src/coding/Makefile
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src/sim/Makefile
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src/usb/Makefile
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src/gsm/Makefile
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src/gb/Makefile
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src/ctrl/Makefile
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@ -19,6 +19,7 @@ build() {
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--disable-doxygen \
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--disable-shared \
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--disable-libsctp \
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--disable-libusb \
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--enable-external-tests \
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CFLAGS="-Os -ffunction-sections -fdata-sections -nostartfiles -nodefaultlibs $WERROR_FLAGS"
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@ -34,6 +34,7 @@ Depends: libosmocodec0 (= ${binary:Version}),
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libosmovty4 (= ${binary:Version}),
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libosmoctrl0 (= ${binary:Version}),
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libosmosim0 (= ${binary:Version}),
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libosmousb0 (= ${binary:Version}),
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${misc:Depends}
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Description: Open Source MObile COMmunications CORE library (metapackage)
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The libraries provided by this package contain various utility functions.
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@ -293,6 +294,23 @@ Description: Osmo SIM library
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.
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The libosmosim library in particular contains routines for SIM card access.
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Package: libosmousb0
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Section: libs
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Architecture: any
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Multi-Arch: same
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Depends: ${shlibs:Depends},
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${misc:Depends}
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Pre-Depends: ${misc:Pre-Depends}
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Description: Osmo USB library
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This is part of the libosmocore "meta"-library. The libosmocore library
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contains various utility functions that were originally developed as part of
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the OpenBSC project, but which are of a more generic nature and thus useful to
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(at least) other programs that are developed in the sphere of Free Software /
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Open Source mobile communication.
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.
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The libosmosub library in particular contains routines for USB device access
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via libusb-1.0, integrated into the libosmocore select event loop.
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Package: libosmocore-dev
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Architecture: any
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Multi-Arch: same
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@ -0,0 +1 @@
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usr/lib/*/libosmousb*.so.*
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@ -164,6 +164,11 @@ nobase_include_HEADERS += \
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osmocom/ctrl/control_vty.h
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endif
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if ENABLE_LIBUSB
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nobase_include_HEADERS += \
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osmocom/usb/libusb.h
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endif
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noinst_HEADERS = \
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osmocom/gsm/kasumi.h \
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osmocom/gsm/gea.h \
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@ -0,0 +1,6 @@
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#pragma once
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#include <libusb.h>
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int osmo_libusb_init(libusb_context **luctx);
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void osmo_libusb_exit(libusb_context *luctx);
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@ -0,0 +1,11 @@
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prefix=@prefix@
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exec_prefix=@exec_prefix@
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libdir=@libdir@
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includedir=@includedir@
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Name: Osmocom libusb (USB) integration
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Description: C Utility Library
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Version: @VERSION@
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Libs: -L${libdir} @TALLOC_LIBS@ -losmousb -losmocore
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Cflags: -I${includedir}/
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@ -0,0 +1,21 @@
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# This is _NOT_ the library release version, it's an API version.
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# Please read chapter "Library interface versions" of the libtool documentation
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# before making any modifications: https://www.gnu.org/software/libtool/manual/html_node/Versioning.html
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LIBVERSION=0:0:0
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AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)/include
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AM_CFLAGS = -fPIC -Wall $(LIBUSB_CFLAGS) $(TALLOC_CFLAGS)
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AM_LDFLAGS = $(COVERAGE_LDFLAGS)
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if ENABLE_LIBUSB
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lib_LTLIBRARIES = libosmousb.la
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libosmousb_la_SOURCES = osmo_libusb.c
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libosmosim_la_LDFLAGS = -version-info $(LIBVERSION)
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libosmosim_la_LIBADD = \
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$(top_builddir)/src/libosmocore.la \
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$(TALLOC_LIBS) \
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$(LIBUSB_LIBS)
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endif
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@ -0,0 +1,137 @@
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/* libosmocore integration with libusb-1.0
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*
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* (C) 2019 by Harald Welte <laforge@gnumonks.org>
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* All Rights Reserved.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <poll.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/core/select.h>
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#include <osmocom/core/talloc.h>
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#include <libusb.h>
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/***********************************************************************
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* logging integration
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***********************************************************************/
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#define DLUSB DLINP
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#ifdef LIBUSB_LOG_CB_CONTEXT /* introduced in 1.0.23 */
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static const int usb2logl[] = {
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[LIBUSB_LOG_LEVEL_NONE] = LOGL_FATAL,
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[LIBUSB_LOG_LEVEL_ERROR] = LOGL_ERROR,
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[LIBUSB_LOG_LEVEL_WARNING] = LOGL_NOTICE,
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[LIBUSB_LOG_LEVEL_INFO] = LOGL_INFO,
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[LIBUSB_LOG_LEVEL_DEBUG] = LOGL_DEBUG,
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};
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/* called by libusb if it wants to log something */
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static void libosmo_usb_log_cb(libusb_context *luctx, enum libusb_log_level level_usb, const char *str)
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{
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int level = LOGL_NOTICE;
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if (level_usb < ARRAY_SIZE(usb2logl))
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level = usb2logl[level_usb];
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LOGP(DLUSB, level, "%s", str);
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}
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#endif /* LIBUSB_LOG_CB_CONTEXT */
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/***********************************************************************
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* select loop integration
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***********************************************************************/
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static int osmo_usb_fd_cb(struct osmo_fd *ofd, unsigned int what)
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{
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libusb_context *luctx = ofd->data;
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/* we assume that we're running Linux v2.6.27 with timerfd support here
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* and hence don't have to perform manual timeout handling. See
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* "Notes on time-based events" at
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* http://libusb.sourceforge.net/api-1.0/group__libusb__poll.html */
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struct timeval zero_tv = { 0, 0 };
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libusb_handle_events_timeout(luctx, &zero_tv);
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return 0;
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}
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/* called by libusb if it wants to add a file-descriptor */
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static void osmo_usb_added_cb(int fd, short events, void *user_data)
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{
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struct osmo_fd *ofd = talloc_zero(OTC_GLOBAL, struct osmo_fd);
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libusb_context *luctx = user_data;
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unsigned int when = 0;
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if (events & POLLIN)
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when |= OSMO_FD_READ;
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if (events & POLLOUT)
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when |= OSMO_FD_WRITE;
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osmo_fd_setup(ofd, fd, when, osmo_usb_fd_cb, luctx, 0);
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osmo_fd_register(ofd);
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}
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/* called by libusb if it wants to remove a file-descriptor */
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static void osmo_usb_removed_cb(int fd, void *user_data)
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{
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struct osmo_fd *ofd = osmo_fd_get_by_fd(fd);
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if (!fd)
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return;
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osmo_fd_unregister(ofd);
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talloc_free(ofd);
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}
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/***********************************************************************
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* initialization
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***********************************************************************/
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int osmo_libusb_init(libusb_context **pluctx)
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{
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libusb_context *luctx = NULL;
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int rc;
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rc = libusb_init(pluctx);
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if (rc != 0)
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return rc;
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if (pluctx)
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luctx = *pluctx;
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#ifdef LIBUSB_LOG_CB_CONTEXT /* introduced in 1.0.23 */
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libusb_set_log_cb(luctx, &libosmo_usb_log_cb, LIBUSB_LOG_CB_CONTEXT);
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#endif
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libusb_set_pollfd_notifiers(luctx, osmo_usb_added_cb, osmo_usb_removed_cb, luctx);
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return 0;
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}
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void osmo_libusb_exit(libusb_context *luctx)
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{
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/* we just assume libusb is cleaning up all the osmo_Fd's we've allocated */
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libusb_exit(luctx);
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}
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