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Initial code import 

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
This commit is contained in:
Sylvain Munaut 2019-05-11 22:31:12 +02:00
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See COPYING.* for the full licenses.
The libosmo-e1d library is licensed under the terms of the GNU Lesser General
Public License as published by the Free Software Foundation, either version 3
of the License, or (at your option) any later version.
The osmo-e1d daemon is licensed under the terms of the GNU General Public
License as published by the Free Software Foundation, either version 2 of the
License, or (at your option) any later version.

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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
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Everyone is permitted to copy and distribute verbatim copies
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GNU LESSER GENERAL PUBLIC LICENSE
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Library as you received it specifies that a certain numbered version
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AUTOMAKE_OPTIONS = foreign dist-bzip2
SUBDIRS = \
src \
include \
$(NULL)
EXTRA_DIST = \
.version \
$(NULL)
pkgconfigdir = $(libdir)/pkgconfig
pkgconfig_DATA = libosmo-e1d.pc
@RELMAKE@
BUILT_SOURCES = $(top_srcdir)/.version
$(top_srcdir)/.version:
echo $(VERSION) > $@-t && mv $@-t $@
dist-hook:
echo $(VERSION) > $(distdir)/.tarball-version

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AC_INIT([osmo-e1d],
m4_esyscmd([./git-version-gen .tarball-version]),
[openbsc@lists.osmocom.org])
dnl *This* is the root dir, even if an install-sh exists in ../ or ../../
AC_CONFIG_AUX_DIR([.])
dnl libtool init
LT_INIT
AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip 1.9])
dnl kernel style compile messages
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
dnl include release helper
RELMAKE='-include osmo-release.mk'
AC_SUBST([RELMAKE])
dnl checks for programs
AC_PROG_MAKE_SET
AC_PROG_MKDIR_P
AC_PROG_CC
AC_PROG_INSTALL
dnl check for pkg-config (explained in detail in libosmocore/configure.ac)
AC_PATH_PROG(PKG_CONFIG_INSTALLED, pkg-config, no)
if test "x$PKG_CONFIG_INSTALLED" = "xno"; then
AC_MSG_WARN([You need to install pkg-config])
fi
PKG_PROG_PKG_CONFIG([0.20])
PKG_CHECK_MODULES(TALLOC, [talloc >= 2.0.1])
PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 1.0.1.120)
PKG_CHECK_MODULES(LIBUSB, libusb-1.0 >= 1.0.21)
AC_CONFIG_MACRO_DIR([m4])
dnl checks for header files
AC_HEADER_STDC
AC_ARG_ENABLE(sanitize,
[AS_HELP_STRING(
[--enable-sanitize],
[Compile with address sanitizer enabled],
)],
[sanitize=$enableval], [sanitize="no"])
if test x"$sanitize" = x"yes"
then
CFLAGS="$CFLAGS -fsanitize=address -fsanitize=undefined"
CPPFLAGS="$CPPFLAGS -fsanitize=address -fsanitize=undefined"
fi
AC_ARG_ENABLE(werror,
[AS_HELP_STRING(
[--enable-werror],
[Turn all compiler warnings into errors, with exceptions:
a) deprecation (allow upstream to mark deprecation without breaking builds);
b) "#warning" pragmas (allow to remind ourselves of errors without breaking builds)
]
)],
[werror=$enableval], [werror="no"])
if test x"$werror" = x"yes"
then
WERROR_FLAGS="-Werror"
WERROR_FLAGS+=" -Wno-error=deprecated -Wno-error=deprecated-declarations"
WERROR_FLAGS+=" -Wno-error=cpp" # "#warning"
CFLAGS="$CFLAGS $WERROR_FLAGS"
CPPFLAGS="$CPPFLAGS $WERROR_FLAGS"
fi
AC_OUTPUT(
Makefile
src/Makefile
include/Makefile
libosmo-e1d.pc
)

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#!/bin/sh
# Print a version string.
scriptversion=2010-01-28.01
# Copyright (C) 2007-2010 Free Software Foundation, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/.
# It may be run two ways:
# - from a git repository in which the "git describe" command below
# produces useful output (thus requiring at least one signed tag)
# - from a non-git-repo directory containing a .tarball-version file, which
# presumes this script is invoked like "./git-version-gen .tarball-version".
# In order to use intra-version strings in your project, you will need two
# separate generated version string files:
#
# .tarball-version - present only in a distribution tarball, and not in
# a checked-out repository. Created with contents that were learned at
# the last time autoconf was run, and used by git-version-gen. Must not
# be present in either $(srcdir) or $(builddir) for git-version-gen to
# give accurate answers during normal development with a checked out tree,
# but must be present in a tarball when there is no version control system.
# Therefore, it cannot be used in any dependencies. GNUmakefile has
# hooks to force a reconfigure at distribution time to get the value
# correct, without penalizing normal development with extra reconfigures.
#
# .version - present in a checked-out repository and in a distribution
# tarball. Usable in dependencies, particularly for files that don't
# want to depend on config.h but do want to track version changes.
# Delete this file prior to any autoconf run where you want to rebuild
# files to pick up a version string change; and leave it stale to
# minimize rebuild time after unrelated changes to configure sources.
#
# It is probably wise to add these two files to .gitignore, so that you
# don't accidentally commit either generated file.
#
# Use the following line in your configure.ac, so that $(VERSION) will
# automatically be up-to-date each time configure is run (and note that
# since configure.ac no longer includes a version string, Makefile rules
# should not depend on configure.ac for version updates).
#
# AC_INIT([GNU project],
# m4_esyscmd([build-aux/git-version-gen .tarball-version]),
# [bug-project@example])
#
# Then use the following lines in your Makefile.am, so that .version
# will be present for dependencies, and so that .tarball-version will
# exist in distribution tarballs.
#
# BUILT_SOURCES = $(top_srcdir)/.version
# $(top_srcdir)/.version:
# echo $(VERSION) > $@-t && mv $@-t $@
# dist-hook:
# echo $(VERSION) > $(distdir)/.tarball-version
case $# in
1) ;;
*) echo 1>&2 "Usage: $0 \$srcdir/.tarball-version"; exit 1;;
esac
tarball_version_file=$1
nl='
'
# First see if there is a tarball-only version file.
# then try "git describe", then default.
if test -f $tarball_version_file
then
v=`cat $tarball_version_file` || exit 1
case $v in
*$nl*) v= ;; # reject multi-line output
[0-9]*) ;;
*) v= ;;
esac
test -z "$v" \
&& echo "$0: WARNING: $tarball_version_file seems to be damaged" 1>&2
fi
if test -n "$v"
then
: # use $v
elif
v=`git describe --abbrev=4 --match='v*' HEAD 2>/dev/null \
|| git describe --abbrev=4 HEAD 2>/dev/null` \
&& case $v in
[0-9]*) ;;
v[0-9]*) ;;
*) (exit 1) ;;
esac
then
# Is this a new git that lists number of commits since the last
# tag or the previous older version that did not?
# Newer: v6.10-77-g0f8faeb
# Older: v6.10-g0f8faeb
case $v in
*-*-*) : git describe is okay three part flavor ;;
*-*)
: git describe is older two part flavor
# Recreate the number of commits and rewrite such that the
# result is the same as if we were using the newer version
# of git describe.
vtag=`echo "$v" | sed 's/-.*//'`
numcommits=`git rev-list "$vtag"..HEAD | wc -l`
v=`echo "$v" | sed "s/\(.*\)-\(.*\)/\1-$numcommits-\2/"`;
;;
esac
# Change the first '-' to a '.', so version-comparing tools work properly.
# Remove the "g" in git describe's output string, to save a byte.
v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;
else
v=UNKNOWN
fi
v=`echo "$v" |sed 's/^v//'`
# Don't declare a version "dirty" merely because a time stamp has changed.
git status > /dev/null 2>&1
dirty=`sh -c 'git diff-index --name-only HEAD' 2>/dev/null` || dirty=
case "$dirty" in
'') ;;
*) # Append the suffix only if there isn't one already.
case $v in
*-dirty) ;;
*) v="$v-dirty" ;;
esac ;;
esac
# Omit the trailing newline, so that m4_esyscmd can use the result directly.
echo "$v" | tr -d '\012'
# Local variables:
# eval: (add-hook 'write-file-hooks 'time-stamp)
# time-stamp-start: "scriptversion="
# time-stamp-format: "%:y-%02m-%02d.%02H"
# time-stamp-end: "$"
# End:

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nobase_include_HEADERS = osmocom/e1d/proto_clnt.h osmocom/e1d/proto.h osmocom/e1d/proto_srv.h

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/*
* proto.h
*
* (C) 2019 by Sylvain Munaut <tnt@246tNt.com>
*
* All Rights Reserved
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include <stdint.h>
#include <osmocom/core/select.h>
/* E1DP_CMD_INTF_QUERY
* filter: intf (optional)
* in: n/a
* out: array of osmo_e1dp_intf_info
*
* E1DP_CMD_LINE_QUERY
* filter: intf (required), line (optional)
* in: n/a
* out: array of osmo_e1dp_line_info
*
* E1DP_CMD_TS_QUERY
* filter: intf (required), line (required), ts (optional)
* in: n/a
* out: array of osmo_e1dp_ts_info
*
* E1DP_CMD_TS_OPEN
* filter: intf (required), line (required), ts (required)
* in: osmo_e1dp_ts_config
* out: osmo_e1dp_ts_info with the opened TS (or an invalid one with id == -1 for errors)
* + message with the file descriptor
*/
enum osmo_e1dp_msg_type {
E1DP_CMD_INTF_QUERY = 0x00,
E1DP_CMD_LINE_QUERY = 0x01,
E1DP_CMD_TS_QUERY = 0x02,
E1DP_CMD_TS_OPEN = 0x04,
E1DP_EVT_TYPE = 0x40,
E1DP_RESP_TYPE = 0x80,
E1DP_ERR_TYPE = 0xc0,
E1DP_TYPE_MSK = 0xc0,
};
enum osmo_e1dp_ts_mode {
E1DP_TSMODE_OFF = 0x00,
E1DP_TSMODE_RAW = 0x10,
E1DP_TSMODE_HDLCFCS = 0x11,
};
#define E1DP_MAGIC 0x00e1
#define E1DP_MAX_LEN 4096
#define E1DP_INVALID 0xff
struct osmo_e1dp_msg_hdr {
uint16_t magic;
uint16_t len;
uint8_t type;
uint8_t intf;
uint8_t line;
uint8_t ts;
} __attribute__((packed));
struct osmo_e1dp_intf_info {
uint8_t id;
uint8_t n_lines;
} __attribute__((packed));
struct osmo_e1dp_line_info {
uint8_t id;
uint8_t status; /* TBD */
} __attribute__((packed));
struct osmo_e1dp_ts_config {
uint8_t mode;
} __attribute__((packed));
struct osmo_e1dp_ts_info {
uint8_t id;
struct osmo_e1dp_ts_config cfg;
uint8_t status; /* TBD */
} __attribute__((packed));
struct msgb *osmo_e1dp_recv(struct osmo_fd *ofd, int *fd);
int osmo_e1dp_send(struct osmo_fd *ofd, struct msgb *msgb, int fd);

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/*
* proto_clnt.h
*
* (C) 2019 by Sylvain Munaut <tnt@246tNt.com>
*
* All Rights Reserved
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include <osmocom/core/msgb.h>
#include <osmocom/e1d/proto.h>
struct osmo_e1dp_client;
struct osmo_e1dp_client *osmo_e1dp_client_create(void *ctx, const char *path);
void osmo_e1dp_client_destroy(struct osmo_e1dp_client *srv);
int osmo_e1dp_client_intf_query(struct osmo_e1dp_client *clnt,
struct osmo_e1dp_intf_info **ii, int *n,
uint8_t intf);
int osmo_e1dp_client_line_query(struct osmo_e1dp_client *clnt,
struct osmo_e1dp_line_info **li, int *n,
uint8_t intf, uint8_t line);
int osmo_e1dp_client_ts_query(struct osmo_e1dp_client *clnt,
struct osmo_e1dp_ts_info **ti, int *n,
uint8_t intf, uint8_t line, uint8_t ts);
int osmo_e1dp_client_ts_open(struct osmo_e1dp_client *clnt,
uint8_t intf, uint8_t line, uint8_t ts,
enum osmo_e1dp_ts_mode mode);

49
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/*
* proto_srv.h
*
* (C) 2019 by Sylvain Munaut <tnt@246tNt.com>
*
* All Rights Reserved
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include <osmocom/core/msgb.h>
struct osmo_e1dp_server;
#define E1DP_SF_INTF_OPT (1<<0)
#define E1DP_SF_INTF_REQ (1<<1)
#define E1DP_SF_LINE_OPT (1<<2)
#define E1DP_SF_LINE_REQ (1<<3)
#define E1DP_SF_TS_OPT (1<<4)
#define E1DP_SF_TS_REQ (1<<5)
typedef int (*osmo_e1dp_server_handler_fn)(void *data, struct msgb *msgb, struct msgb *rmsgb, int *rfd);
struct osmo_e1dp_server_handler {
uint8_t type;
int flags;
int payload_len;
osmo_e1dp_server_handler_fn fn;
};
struct osmo_e1dp_server *osmo_e1dp_server_create(void *ctx, const char *path,
struct osmo_e1dp_server_handler *handlers, void *handler_data);
void osmo_e1dp_server_destroy(struct osmo_e1dp_server *srv);

10
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prefix=@prefix@
exec_prefix=@exec_prefix@
libdir=@libdir@
includedir=@includedir@
Name: Osmocom E1 Daemon Protocol Library
Description: C Utility Library
Version: @VERSION@
Libs: -L${libdir} -losmo-e1d
Cflags: -I${includedir}/

38
src/Makefile.am Normal file
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# This is _NOT_ the library release version, it's an API version.
# Please read Chapter 6 "Library interface versions" of the libtool
# documentation before making any modification
LIBVERSION=0:0:0
AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
AM_CFLAGS=-Wall $(LIBOSMOCORE_CFLAGS) $(LIBUSB_CFLAGS)
lib_LTLIBRARIES = libosmo-e1d.la
libosmo_e1d_la_SOURCES = \
proto.c \
proto_clnt.c \
proto_srv.c \
$(NULL)
libosmo_e1d_la_LDFLAGS = -version-info $(LIBVERSION) -no-undefined -export-symbols-regex '^osmo_'
libosmo_e1d_la_LIBADD = $(LIBOSMOCORE_LIBS)
noinst_HEADERS = \
e1d.h \
log.h \
$(NULL)
bin_PROGRAMS = \
osmo-e1d \
$(NULL)
osmo_e1d_SOURCES = \
ctl.c \
log.c \
osmo-e1d.c \
usb.c \
$(NULL)
osmo_e1d_LDADD = $(LIBOSMOCORE_LIBS) $(LIBUSB_LIBS) libosmo-e1d.la

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/*
* ctl.c
*
* (C) 2019 by Sylvain Munaut <tnt@246tNt.com>
*
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <osmocom/core/isdnhdlc.h>
#include <osmocom/core/msgb.h>
#include <osmocom/e1d/proto.h>
#include <osmocom/e1d/proto_srv.h>
#include "e1d.h"
static struct e1_intf *
_e1d_find_intf(struct e1_daemon *e1d, uint8_t id)
{
struct e1_intf *intf;
llist_for_each_entry(intf, &e1d->interfaces, list)
if (intf->id == id)
return intf;
return NULL;
}
static struct e1_line *
_e1d_find_line(struct e1_intf *intf, uint8_t id)
{
struct e1_line *line;
llist_for_each_entry(line, &intf->lines, list)
if (line->id == id)
return line;
return NULL;
}
static struct e1_ts *
_e1d_get_ts(struct e1_line *line, uint8_t ts)
{
return (ts < 32) ? &line->ts[ts] : NULL;
}
static void
_e1d_fill_intf_info(struct osmo_e1dp_intf_info *ii, struct e1_intf *intf)
{
ii->id = intf->id;
ii->n_lines = llist_count(&intf->lines);
}
static void
_e1d_fill_line_info(struct osmo_e1dp_line_info *li, struct e1_line *line)
{
li->id = line->id;
li->status = 0x00;
}
static void
_e1d_fill_ts_info(struct osmo_e1dp_ts_info *ti, struct e1_ts *ts)
{
ti->id = ts->id;
ti->cfg.mode = 0;
ti->status = 0;
}
static void
_e1d_ts_stop(struct e1_ts *ts)
{
ts->mode = E1_TS_MODE_OFF;
if (ts->fd > 0) {
close(ts->fd);
ts->fd = -1;
}
}
static int
_e1d_ts_start(struct e1_ts *ts, enum e1_ts_mode mode)
{
int ret, sd[2];
ret = socketpair(AF_UNIX, SOCK_SEQPACKET, 0, sd);
if (ret < 0)
return ret;
ts->fd = sd[0];
ts->mode = mode;
if (mode == E1_TS_MODE_HDLCFCS) {
osmo_isdnhdlc_out_init(&ts->hdlc_tx, OSMO_HDLC_F_BITREVERSE);
osmo_isdnhdlc_rcv_init(&ts->hdlc_rx, OSMO_HDLC_F_BITREVERSE);
}
int flags = fcntl(ts->fd, F_GETFL);
fcntl(ts->fd, F_SETFL, flags | O_NONBLOCK);
return sd[1];
}
static int
_e1d_ctl_intf_query(void *data, struct msgb *msgb, struct msgb *rmsgb, int *rfd)
{
struct e1_daemon *e1d = (struct e1_daemon *)data;
struct osmo_e1dp_msg_hdr *hdr = msgb_l1(msgb);
struct osmo_e1dp_intf_info *ii;
struct e1_intf *intf = NULL;
int n;
/* Process query and find interface */
if (hdr->intf != E1DP_INVALID) {
intf = _e1d_find_intf(e1d, hdr->intf);
n = intf ? 1 : 0;
} else {
n = llist_count(&e1d->interfaces);
}
if (!n)
return 0;
/* Allocate reponse */
rmsgb->l2h = msgb_put(rmsgb, n * sizeof(struct osmo_e1dp_intf_info));
ii = msgb_l2(rmsgb);
memset(ii, 0x00, n * sizeof(struct osmo_e1dp_intf_info));
/* Fill response */
if (intf) {
_e1d_fill_intf_info(ii, intf);
} else {
llist_for_each_entry(intf, &e1d->interfaces, list)
_e1d_fill_intf_info(ii++, intf);
}
return 0;
}
static int
_e1d_ctl_line_query(void *data, struct msgb *msgb, struct msgb *rmsgb, int *rfd)
{
struct e1_daemon *e1d = (struct e1_daemon *)data;
struct osmo_e1dp_msg_hdr *hdr = msgb_l1(msgb);
struct osmo_e1dp_line_info *li;
struct e1_intf *intf = NULL;
struct e1_line *line = NULL;
int n;
/* Process query and find line */
intf = _e1d_find_intf(e1d, hdr->intf);
if (!intf)
return 0;
if (hdr->line != E1DP_INVALID) {
line = _e1d_find_line(intf, hdr->line);
n = line ? 1 : 0;
} else{
n = llist_count(&intf->lines);
}
if (!n)
return 0;
/* Allocate reponse */
rmsgb->l2h = msgb_put(rmsgb, n * sizeof(struct osmo_e1dp_line_info));
li = msgb_l2(rmsgb);
memset(li, 0x00, n * sizeof(struct osmo_e1dp_line_info));
/* Fill response */
if (line) {
_e1d_fill_line_info(li, line);
} else {
llist_for_each_entry(line, &intf->lines, list)
_e1d_fill_line_info(li++, line);
}
return 0;
}
static int
_e1d_ctl_ts_query(void *data, struct msgb *msgb, struct msgb *rmsgb, int *rfd)
{
struct e1_daemon *e1d = (struct e1_daemon *)data;
struct osmo_e1dp_msg_hdr *hdr = msgb_l1(msgb);
struct osmo_e1dp_ts_info *ti;
struct e1_intf *intf = NULL;
struct e1_line *line = NULL;
int n;
/* Process query and find timeslot */
intf = _e1d_find_intf(e1d, hdr->intf);
if (!intf)
return 0;
line = _e1d_find_line(intf, hdr->line);
if (!line)
return 0;
n = (hdr->ts == E1DP_INVALID) ? 32 : (
((hdr->ts >= 0) && (hdr->ts < 31)) ? 1 : 0
);
if (!n)
return 0;
/* Allocate reponse */
rmsgb->l2h = msgb_put(rmsgb, n * sizeof(struct osmo_e1dp_ts_info));
ti = msgb_l2(rmsgb);
memset(ti, 0x00, n * sizeof(struct osmo_e1dp_line_info));
/* Fill response */
if (n == 1) {
_e1d_fill_ts_info(ti, &line->ts[hdr->ts]);
} else {
for (int i=0; i<32; i++)
_e1d_fill_ts_info(ti++, &line->ts[i]);
}
return 0;
}
static int
_e1d_ctl_ts_open(void *data, struct msgb *msgb, struct msgb *rmsgb, int *rfd)
{
struct e1_daemon *e1d = (struct e1_daemon *)data;
struct osmo_e1dp_msg_hdr *hdr = msgb_l1(msgb);
struct osmo_e1dp_ts_config *cfg = msgb_l2(msgb);
struct osmo_e1dp_ts_info *ti;
struct e1_intf *intf = NULL;
struct e1_line *line = NULL;
struct e1_ts *ts = NULL;
enum e1_ts_mode mode;
int ret;
/* Process query and find timeslot */
intf = _e1d_find_intf(e1d, hdr->intf);
if (!intf)
return 0;
line = _e1d_find_line(intf, hdr->line);
if (!line)
return 0;
ts = _e1d_get_ts(line, hdr->ts);
if (!ts)
return 0;
/* Select mode */
switch (cfg->mode) {
case E1DP_TSMODE_RAW:
mode = E1_TS_MODE_RAW;
break;
case E1DP_TSMODE_HDLCFCS:
mode = E1_TS_MODE_HDLCFCS;
break;
default:
return 0;
}
/* If already open, close previous */
_e1d_ts_stop(ts);
/* Init */
ret = _e1d_ts_start(ts, mode);
if (ret < 0)
return ret;
*rfd = ret;
/* Allocate response */
rmsgb->l2h = msgb_put(rmsgb, sizeof(struct osmo_e1dp_ts_info));
ti = msgb_l2(rmsgb);
memset(ti, 0x00, sizeof(struct osmo_e1dp_line_info));
/* Fill reponse */
ti->id = hdr->ts;
ti->cfg.mode = cfg->mode;
ti->status = 0xa5;
return 0;
}
struct osmo_e1dp_server_handler e1d_ctl_handlers[] = {
{
.type = E1DP_CMD_INTF_QUERY,
.flags = E1DP_SF_INTF_OPT,
.payload_len = 0,
.fn = _e1d_ctl_intf_query,
},
{
.type = E1DP_CMD_LINE_QUERY,
.flags = E1DP_SF_INTF_REQ | E1DP_SF_LINE_OPT,
.payload_len = 0,
.fn = _e1d_ctl_line_query,
},
{
.type = E1DP_CMD_TS_QUERY,
.flags = E1DP_SF_INTF_REQ | E1DP_SF_LINE_REQ | E1DP_SF_TS_OPT,
.payload_len = 0,
.fn = _e1d_ctl_ts_query,
},
{
.type = E1DP_CMD_TS_OPEN,
.flags = E1DP_SF_INTF_REQ | E1DP_SF_LINE_REQ | E1DP_SF_TS_REQ,
.payload_len = sizeof(struct osmo_e1dp_ts_config),
.fn = _e1d_ctl_ts_open,
},
{ /* guard */ },
};

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/*
* e1d.h
*
* (C) 2019 by Sylvain Munaut <tnt@246tNt.com>
*
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdint.h>
#include <osmocom/core/isdnhdlc.h>
#include <osmocom/core/linuxlist.h>
enum e1_ts_mode {
E1_TS_MODE_OFF = 0,
E1_TS_MODE_RAW,
E1_TS_MODE_HDLCFCS,
};
struct e1_ts {
struct e1_line *line;
uint8_t id;
/* Mode */
enum e1_ts_mode mode;
/* HDLC handling */
struct osmo_isdnhdlc_vars hdlc_tx;
struct osmo_isdnhdlc_vars hdlc_rx;
uint8_t rx_buf[264];
uint8_t tx_buf[264];
int tx_ofs;
int tx_len;
/* Remote end */
int fd;
};
struct e1_line {
struct llist_head list;
struct e1_intf *intf;
uint8_t id;
void *drv_data;
struct e1_ts ts[32];
};
struct e1_intf {
struct llist_head list;
struct e1_daemon *e1d;
uint8_t id;
void *drv_data;
struct llist_head lines;
};
struct e1_daemon {
void *ctx;
struct llist_head interfaces;
};

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/*
* log.c
*
* (C) 2019 by Sylvain Munaut <tnt@246tNt.com>
*
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <osmocom/core/logging.h>
#include <osmocom/core/utils.h>
#include "log.h"
static const struct log_info_cat default_categories[] = {
[DE1D] = {
.name = "DE1D",
.loglevel = LOGL_DEBUG,
.enabled = 1,
},
};
const struct log_info log_info = {
.cat = default_categories,
.num_cat = ARRAY_SIZE(default_categories),
};

33
src/log.h Normal file
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/*
* log.h
*
* (C) 2019 by Sylvain Munaut <tnt@246tNt.com>
*
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include <osmocom/core/logging.h>
enum {
DE1D,
};
extern const struct log_info log_info;

136
src/osmo-e1d.c Normal file
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/*
* osmo-e1d.c
*
* (C) 2019 by Sylvain Munaut <tnt@246tNt.com>
*
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <errno.h>
#include <sched.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <talloc.h>
#include <osmocom/core/application.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/select.h>
#include <osmocom/e1d/proto_srv.h>
#include "e1d.h"
#include "log.h"
extern struct osmo_e1dp_server_handler e1d_ctl_handlers[];
extern int e1_usb_probe(struct e1_daemon *e1d);
extern int e1_usb_poll(void);
static void *g_e1d_ctx = NULL;
static int g_shutdown = 0;
static void sig_handler(int signo)
{
fprintf(stdout, "signal %d received\n", signo);
switch (signo) {
case SIGINT:
case SIGTERM:
fprintf(stdout, "shutting down\n");
g_shutdown = 1;
break;
case SIGABRT:
case SIGUSR1:
talloc_report(g_e1d_ctx, stderr);
talloc_report_full(g_e1d_ctx, stderr);
break;
case SIGUSR2:
talloc_report_full(g_e1d_ctx, stderr);
break;
default:
break;
}
}
int main(int argc, char *argv[])
{
struct e1_daemon *e1d = NULL;
struct osmo_e1dp_server *srv = NULL;
struct sched_param sp;
int rv;
/* talloc init */
g_e1d_ctx = talloc_named_const(NULL, 0, "osmo-e1d");
msgb_talloc_ctx_init(g_e1d_ctx, 0);
/* logging init */
osmo_init_logging2(g_e1d_ctx, &log_info);
/* signals init */
signal(SIGINT, &sig_handler);
signal(SIGTERM, &sig_handler);
signal(SIGABRT, &sig_handler);
signal(SIGUSR1, &sig_handler);
signal(SIGUSR2, &sig_handler);
osmo_init_ignore_signals();
/* rt prio */
memset(&sp, 0x00, sizeof(sp));
sp.sched_priority = 50;
rv = sched_setscheduler(0, SCHED_RR, &sp);
if (rv != 0) {
LOGP(DE1D, LOGL_ERROR, "Failed to set Real-Time priority. USB comms might be unstable.\n");
perror("sched_setscheduler");
}
/* main state */
e1d = talloc_zero(g_e1d_ctx, struct e1_daemon);
OSMO_ASSERT(e1d);
INIT_LLIST_HEAD(&e1d->interfaces);
/* probe devices */
rv = e1_usb_probe(e1d);
if (rv != 0) {
LOGP(DE1D, LOGL_ERROR, "Failed to prove usb devices\n");
}
/* server init */
srv = osmo_e1dp_server_create(g_e1d_ctx, "/tmp/osmo-e1d.ctl", e1d_ctl_handlers, e1d);
OSMO_ASSERT(srv);
/* main loop */
while (!g_shutdown) {
osmo_select_main(1);
e1_usb_poll();
}
/* cleanup */
if (srv)
osmo_e1dp_server_destroy(srv);
talloc_free(e1d);
return 0;
}

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/*
* proto.c
*
* (C) 2019 by Sylvain Munaut <tnt@246tNt.com>
*
* All Rights Reserved
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/select.h>
#include <osmocom/core/socket.h>
#include <osmocom/core/utils.h>
#include <osmocom/e1d/proto.h>
#include "log.h"
struct msgb *
osmo_e1dp_recv(struct osmo_fd *ofd, int *fd)
{
struct msgb *msgb;
struct osmo_e1dp_msg_hdr *hdr;
struct iovec iov;
struct msghdr msg;
struct cmsghdr *cmsg;
char cms[CMSG_SPACE(sizeof(int))];
int rc;
msgb = msgb_alloc(E1DP_MAX_LEN, "e1d proto rx message");
memset(&msg, 0x00, sizeof(msg));
iov.iov_base = msgb->data;
iov.iov_len = E1DP_MAX_LEN;
msg.msg_name = 0;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_flags = 0;
msg.msg_control = (caddr_t) cms;
msg.msg_controllen = sizeof(cms);
rc = recvmsg(ofd->fd, &msg, MSG_WAITALL | MSG_CMSG_CLOEXEC);
if (rc == 0)
goto err;
if (rc < (int)sizeof(struct osmo_e1dp_msg_hdr)) {
LOGP(DE1D, LOGL_ERROR, "Failed to read packet header.\n");
goto err;
}
msgb->l1h = msgb_put(msgb, sizeof(struct osmo_e1dp_msg_hdr));
hdr = msgb_l1(msgb);
if ((hdr->magic != E1DP_MAGIC) || (hdr->len < sizeof(struct osmo_e1dp_msg_hdr))) {
LOGP(DE1D, LOGL_ERROR, "Invalid packet header.\n");
goto err;
}
if (hdr->len > sizeof(struct osmo_e1dp_msg_hdr))
msgb->l2h = msgb_put(msgb, hdr->len - sizeof(struct osmo_e1dp_msg_hdr));
else
msgb->l2h = msgb->tail;
if (fd) {
cmsg = CMSG_FIRSTHDR(&msg);
if (cmsg) {
memmove(fd, CMSG_DATA(cmsg), sizeof(int));
} else {
*fd = -1;
}
}
LOGP(DE1D, LOGL_DEBUG, "rx pkt: %d %s\n", fd ? *fd : -2, msgb_hexdump(msgb));
return msgb;
err:
msgb_free(msgb);
return NULL;
}
int
osmo_e1dp_send(struct osmo_fd *ofd, struct msgb *msgb, int fd)
{
struct msghdr msg;
struct iovec iov;
char cmsgbuf[CMSG_SPACE(sizeof(int))];
int rc;
memset(&msg, 0x00, sizeof(msg));
iov.iov_base = msgb->data;
iov.iov_len = msgb_length(msgb);
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_flags = 0;
if (fd >= 0) {
msg.msg_control = cmsgbuf;
msg.msg_controllen = CMSG_LEN(sizeof(int));
struct cmsghdr* cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(int));
*(int*) CMSG_DATA(cmsg) = fd;
}
rc = sendmsg(ofd->fd, &msg, 0);
if (rc < 0) {
LOGP(DE1D, LOGL_ERROR, "Failed to send packet.\n");
perror("tx");
}
if (fd >= 0)
close(fd);
LOGP(DE1D, LOGL_DEBUG, "tx pkt: %d %s\n", msgb_length(msgb), msgb_hexdump(msgb));
return rc;
}

319
src/proto_clnt.c Normal file
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/*
* proto_clnt.c
*
* (C) 2019 by Sylvain Munaut <tnt@246tNt.com>
*
* All Rights Reserved
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <talloc.h>
#include <osmocom/core/linuxlist.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/select.h>
#include <osmocom/core/socket.h>
#include <osmocom/core/utils.h>
#include <osmocom/e1d/proto.h>
#include <osmocom/e1d/proto_clnt.h>
#include "log.h"
struct osmo_e1dp_client {
void *ctx;
struct osmo_fd ctl_fd;
};
static int
_e1dp_client_event(struct osmo_e1dp_client *clnt, struct msgb *msgb)
{
/* FIXME */
return 0;
}
static int
_e1dp_client_read(struct osmo_fd *ofd, unsigned int flags)
{
struct osmo_e1dp_client *clnt = ofd->data;
struct msgb *msgb;
struct osmo_e1dp_msg_hdr *hdr;
msgb = osmo_e1dp_recv(ofd, NULL);
if (!msgb)
goto err;
hdr = msgb_l1(msgb);
if ((hdr->type & E1DP_TYPE_MSK) != E1DP_EVT_TYPE)
goto err;
_e1dp_client_event(clnt, msgb);
msgb_free(msgb);
return 0;
err:
msgb_free(msgb);
return -1;
}
struct osmo_e1dp_client *
osmo_e1dp_client_create(void *ctx, const char *path)
{
struct osmo_e1dp_client *clnt;
int rc;
/* Base structure init */
clnt = talloc_zero(ctx, struct osmo_e1dp_client);
OSMO_ASSERT(clnt);
clnt->ctx = ctx;
/* Client socket */
rc = osmo_sock_unix_init_ofd(&clnt->ctl_fd, SOCK_SEQPACKET, 0, path, OSMO_SOCK_F_CONNECT);
if (rc < 0)
goto err;
clnt->ctl_fd.cb = _e1dp_client_read;
clnt->ctl_fd.data = clnt;
return clnt;
err:
talloc_free(clnt);
return NULL;
}
void
osmo_e1dp_client_destroy(struct osmo_e1dp_client *clnt)
{
if (!clnt)
return;
osmo_fd_close(&clnt->ctl_fd);
talloc_free(clnt);
}
static int
_e1dp_client_query_base(struct osmo_e1dp_client *clnt,
struct osmo_e1dp_msg_hdr *hdr, void *payload, int payload_len,
struct msgb **resp, int *rfd)
{
struct msgb *msgb;
struct osmo_e1dp_msg_hdr *msg_hdr;
int rc, fd;
/* Request */
msgb = msgb_alloc(E1DP_MAX_LEN, "e1dp client request");
OSMO_ASSERT(msgb);
msg_hdr = (struct osmo_e1dp_msg_hdr *)msgb_put(msgb, sizeof(struct osmo_e1dp_msg_hdr));
memcpy(msg_hdr, hdr, sizeof(struct osmo_e1dp_msg_hdr));
msg_hdr->magic = E1DP_MAGIC;
msg_hdr->len = sizeof(struct osmo_e1dp_msg_hdr) + payload_len;
if (payload_len) {
msgb->l2h = msgb_put(msgb, payload_len);
memcpy(msgb_l2(msgb), payload, payload_len);
}
rc = osmo_e1dp_send(&clnt->ctl_fd, msgb, -1);
if (rc < 0)
return rc;
msgb_free(msgb);
/* Response */
int flags = fcntl(clnt->ctl_fd.fd, F_GETFL, 0);
fcntl(clnt->ctl_fd.fd, F_SETFL, flags & ~O_NONBLOCK);
while (1) {
fd = -1;
msgb = osmo_e1dp_recv(&clnt->ctl_fd, &fd);
if (!msgb) {
rc = -EPIPE;
goto err;
}
msg_hdr = msgb_l1(msgb);
if ((msg_hdr->type & E1DP_TYPE_MSK) != E1DP_EVT_TYPE)
break;
_e1dp_client_event(clnt, msgb);
msgb_free(msgb);
}
fcntl(clnt->ctl_fd.fd, F_SETFL, flags);
if (msg_hdr->type != (hdr->type | E1DP_RESP_TYPE)) {
rc = -EPIPE;
goto err;
}
*resp = msgb;
if (rfd)
*rfd = fd;
return 0;
err:
fcntl(clnt->ctl_fd.fd, F_SETFL, flags);
msgb_free(msgb);
return rc;
}
int
osmo_e1dp_client_intf_query(struct osmo_e1dp_client *clnt,
struct osmo_e1dp_intf_info **ii, int *n,
uint8_t intf)
{
struct msgb *msgb;
struct osmo_e1dp_msg_hdr hdr;
int rc;
memset(&hdr, 0x00, sizeof(struct osmo_e1dp_msg_hdr));
hdr.type = E1DP_CMD_INTF_QUERY;
hdr.intf = intf;
hdr.line = E1DP_INVALID;
hdr.ts = E1DP_INVALID;
rc = _e1dp_client_query_base(clnt, &hdr, NULL, 0, &msgb, NULL);
if (rc)
return rc;
*n = msgb_l2len(msgb) / sizeof(struct osmo_e1dp_intf_info);
if (*n) {
*ii = talloc_array(clnt->ctx, struct osmo_e1dp_intf_info, *n);
memcpy(*ii, msgb_l2(msgb), *n * sizeof(struct osmo_e1dp_intf_info));
}
msgb_free(msgb);
return 0;
}
int
osmo_e1dp_client_line_query(struct osmo_e1dp_client *clnt,
struct osmo_e1dp_line_info **li, int *n,
uint8_t intf, uint8_t line)
{
struct msgb *msgb;
struct osmo_e1dp_msg_hdr hdr;
int rc;
memset(&hdr, 0x00, sizeof(struct osmo_e1dp_msg_hdr));
hdr.type = E1DP_CMD_LINE_QUERY;
hdr.intf = intf;
hdr.line = line;
hdr.ts = E1DP_INVALID;
rc = _e1dp_client_query_base(clnt, &hdr, NULL, 0, &msgb, NULL);
if (rc)
return rc;
*n = msgb_l2len(msgb) / sizeof(struct osmo_e1dp_line_info);
if (*n) {
*li = talloc_array(clnt->ctx, struct osmo_e1dp_line_info, *n);
memcpy(*li, msgb_l2(msgb), *n * sizeof(struct osmo_e1dp_line_info));
}
msgb_free(msgb);
return 0;
}
int
osmo_e1dp_client_ts_query(struct osmo_e1dp_client *clnt,
struct osmo_e1dp_ts_info **ti, int *n,
uint8_t intf, uint8_t line, uint8_t ts)
{
struct msgb *msgb;
struct osmo_e1dp_msg_hdr hdr;
int rc;
memset(&hdr, 0x00, sizeof(struct osmo_e1dp_msg_hdr));
hdr.type = E1DP_CMD_TS_QUERY;
hdr.intf = intf;
hdr.line = line;
hdr.ts = ts;
rc = _e1dp_client_query_base(clnt, &hdr, NULL, 0, &msgb, NULL);
if (rc)
return rc;
*n = msgb_l2len(msgb) / sizeof(struct osmo_e1dp_ts_info);
if (*n) {
*ti = talloc_array(clnt->ctx, struct osmo_e1dp_ts_info, *n);
memcpy(*ti, msgb_l2(msgb), *n * sizeof(struct osmo_e1dp_ts_info));
}
msgb_free(msgb);
return 0;
}
int
osmo_e1dp_client_ts_open(struct osmo_e1dp_client *clnt,
uint8_t intf, uint8_t line, uint8_t ts,
enum osmo_e1dp_ts_mode mode)
{
struct msgb *msgb;
struct osmo_e1dp_msg_hdr hdr;
struct osmo_e1dp_ts_config cfg;
int rc, tsfd;
memset(&hdr, 0x00, sizeof(struct osmo_e1dp_msg_hdr));
hdr.type = E1DP_CMD_TS_OPEN;
hdr.intf = intf;
hdr.line = line;
hdr.ts = ts;
memset(&cfg, 0x00, sizeof(struct osmo_e1dp_ts_config));
cfg.mode = mode;
tsfd = -1;
rc = _e1dp_client_query_base(clnt, &hdr, &cfg, sizeof(struct osmo_e1dp_ts_config), &msgb, &tsfd);
if (rc)
return rc;
if ((tsfd < 0) || (msgb_l2len(msgb) != sizeof(struct osmo_e1dp_ts_info)))
return -EPIPE;
msgb_free(msgb);
return tsfd;
}

260
src/proto_srv.c Normal file
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/*
* proto_srv.c
*
* (C) 2019 by Sylvain Munaut <tnt@246tNt.com>
*
* All Rights Reserved
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <errno.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <talloc.h>
#include <osmocom/core/linuxlist.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/select.h>
#include <osmocom/core/socket.h>
#include <osmocom/core/utils.h>
#include <osmocom/e1d/proto.h>
#include <osmocom/e1d/proto_srv.h>
#include "log.h"
struct osmo_e1dp_server {
void *ctx;
struct osmo_fd ctl_fd;
struct llist_head conns;
struct osmo_e1dp_server_handler *handlers;
void *handler_data;
};
struct osmo_e1dp_server_conn {
struct llist_head list;
struct osmo_e1dp_server *srv;
struct osmo_fd fd;
};
static int
_e1dp_server_request(struct osmo_e1dp_server_conn *conn, struct msgb *msgb)
{
struct osmo_e1dp_msg_hdr *hdr = msgb_l1(msgb);
struct osmo_e1dp_msg_hdr *rhdr;
struct osmo_e1dp_server_handler *h;
struct msgb *rmsgb;
int rfd, rc;
/* Find handler */
h = conn->srv->handlers;
while (h->fn) {
if (h->type == hdr->type)
break;
h++;
}
if (!h->fn) {
LOGP(DE1D, LOGL_ERROR, "Unhandled message type: %d.\n", hdr->type);
return -1;
}
/* Check flags */
if (((hdr->intf == E1DP_INVALID) ?
(h->flags & E1DP_SF_INTF_REQ) : !(h->flags & (E1DP_SF_INTF_OPT | E1DP_SF_INTF_REQ))) ||
((hdr->line == E1DP_INVALID) ?
(h->flags & E1DP_SF_LINE_REQ) : !(h->flags & (E1DP_SF_LINE_OPT | E1DP_SF_LINE_REQ))) ||
((hdr->ts == E1DP_INVALID) ?
(h->flags & E1DP_SF_TS_REQ) : !(h->flags & (E1DP_SF_TS_OPT | E1DP_SF_TS_REQ))))
{
LOGP(DE1D, LOGL_ERROR, "Invalid type/intf/line for message type: %d / (%d/%d/%d) %d.\n",
hdr->type, hdr->intf, hdr->line, hdr->ts, h->flags);
return -1;
}
/* Check payload length */
if ((h->payload_len >= 0) &&
(h->payload_len != (msgb_length(msgb) - sizeof(struct osmo_e1dp_msg_hdr))))
{
LOGP(DE1D, LOGL_ERROR, "Invalid payload for message type: %d / (%d/%d/%d).\n",
hdr->type, hdr->intf, hdr->line, hdr->ts);
return -1;
}
/* Call handler */
rmsgb = msgb_alloc(E1DP_MAX_LEN, "e1d proto tx message");
rfd = -1;
rmsgb->l1h = msgb_put(rmsgb, sizeof(struct osmo_e1dp_msg_hdr));
rhdr = msgb_l1(rmsgb);
rc = h->fn(conn->srv->handler_data, msgb, rmsgb, &rfd);
if (rc) {
msgb_trim(rmsgb, msgb_l1len(rmsgb));
rhdr->type = E1DP_ERR_TYPE | (rc & 0x3f);
} else {
rhdr->type = hdr->type | E1DP_RESP_TYPE;
}
rhdr->magic = E1DP_MAGIC;
rhdr->len = msgb_length(rmsgb);
/* Send response */
rc = osmo_e1dp_send(&conn->fd, rmsgb, rfd);
rc = (rc <= 0) ? -EPIPE : 0;
/* Done */
msgb_free(rmsgb);
return rc;
}
static void
_e1dp_server_disconnect(struct osmo_e1dp_server_conn *conn)
{
osmo_fd_close(&conn->fd);
llist_del(&conn->list);
talloc_free(conn);
}
static int
_e1dp_server_read(struct osmo_fd *fd, unsigned int flags)
{
struct osmo_e1dp_server_conn *conn = fd->data;
struct msgb *msgb;
int rc;
msgb = osmo_e1dp_recv(fd, NULL);
if (!msgb)
goto err;
rc = _e1dp_server_request(conn, msgb);
if (rc)
goto err;
msgb_free(msgb);
return 0;
err:
/* Disconnect client */
msgb_free(msgb);
_e1dp_server_disconnect(conn);
return -1;
}
static int
_e1dp_server_accept(struct osmo_fd *fd, unsigned int flags)
{
struct osmo_e1dp_server *srv = fd->data;
struct osmo_e1dp_server_conn *conn;
struct sockaddr_un un_addr;
socklen_t len;
int rc;
len = sizeof(un_addr);
rc = accept(fd->fd, (struct sockaddr *) &un_addr, &len);
if (rc < 0) {
LOGP(DE1D, LOGL_ERROR, "Failed to accept a new connection.\n");
return -1;
}
conn = talloc_zero(srv->ctx, struct osmo_e1dp_server_conn);
if (!conn) {
LOGP(DE1D, LOGL_ERROR, "Failed to create incoming connection.\n");
return -1;
}
conn->srv = srv;
conn->fd.fd = rc;
conn->fd.when = BSC_FD_READ;
conn->fd.cb = _e1dp_server_read;
conn->fd.data = conn;
if (osmo_fd_register(&conn->fd) != 0) {
LOGP(DE1D, LOGL_ERROR, "Failed to register incoming fd.\n");
return -1;
}
llist_add(&conn->list, &srv->conns);
LOGP(DE1D, LOGL_DEBUG, "New incoming connection.\n");
return 0;
}
struct osmo_e1dp_server *
osmo_e1dp_server_create(void *ctx, const char *path,
struct osmo_e1dp_server_handler *handlers, void *handler_data)
{
struct osmo_e1dp_server *srv;
int rc;
/* Base structure init */
srv = talloc_zero(ctx, struct osmo_e1dp_server);
OSMO_ASSERT(srv);
srv->ctx = ctx;
srv->handlers = handlers;
srv->handler_data = handler_data;
INIT_LLIST_HEAD(&srv->conns);
/* Server socket */
rc = osmo_sock_unix_init_ofd(&srv->ctl_fd, SOCK_SEQPACKET, 0, path, OSMO_SOCK_F_BIND);
if (rc < 0)
goto err;
srv->ctl_fd.cb = _e1dp_server_accept;
srv->ctl_fd.data = srv;
return srv;
err:
talloc_free(srv);
return NULL;
}
void
osmo_e1dp_server_destroy(struct osmo_e1dp_server *srv)
{
struct osmo_e1dp_server_conn *conn, *tmp;
if (!srv)
return;
/* Disconnect all clients */
llist_for_each_entry_safe(conn, tmp, &srv->conns, list) {
_e1dp_server_disconnect(conn);
}
/* Resource release */
osmo_fd_close(&srv->ctl_fd);
talloc_free(srv);
}

616
src/usb.c Normal file
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@ -0,0 +1,616 @@
/*
* usb.c
*
* (C) 2019 by Sylvain Munaut <tnt@246tNt.com>
*
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <errno.h>
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <talloc.h>
#include <osmocom/core/isdnhdlc.h>
#include <osmocom/core/utils.h>
#include <libusb.h>
#include "e1d.h"
#include "log.h"
#define USB_VID 0x1d50
#define USB_PID 0xe1e1
libusb_context *g_usb = NULL;
struct e1_usb_flow;
/* Driver data */
struct e1_usb_line_data {
/* Interface */
uint8_t if_num;
/* End Points */
uint8_t ep_in;
uint8_t ep_out;
uint8_t ep_fb;
/* Max packet size */
int pkt_size;
/* Flow */
struct e1_usb_flow *flow_in;
struct e1_usb_flow *flow_out;
struct e1_usb_flow *flow_fb;
/* Rate regulation */
uint32_t r_acc;
uint32_t r_sw;
};
struct e1_usb_intf_data {
libusb_device_handle *devh;
};
/* Flow */
struct e1_usb_flow_entry {
uint8_t *buf;
struct libusb_transfer *xfr;
};
typedef int (*xfer_cb_t)(struct e1_usb_flow *flow, uint8_t *buf, int size);
struct e1_usb_flow {
struct e1_line *line;
xfer_cb_t cb;
uint8_t ep;
int count;
int size;
int ppx;
struct e1_usb_flow_entry *entries;
};
// ---------------------------------------------------------------------------
// USB data transfer
// ---------------------------------------------------------------------------
static int
_e1_rx_hdlcfs(struct e1_ts *ts, uint8_t *buf, int len)
{
int rv, cl, oi;
oi = 0;
while (oi < len) {
rv = osmo_isdnhdlc_decode(&ts->hdlc_rx,
&buf[oi], len-oi, &cl,
ts->rx_buf, sizeof(ts->rx_buf)
);
if (rv > 0) {
printf("RX Message: %d %d [ %s]\n", ts->id, rv, osmo_hexdump(ts->rx_buf, rv));
write(ts->fd, ts->rx_buf, rv);
} else if (rv < 0 && ts->id == 4) {
printf("ERR RX: %d %d %d [ %s]\n",rv,oi,cl, osmo_hexdump(buf, len));
}
oi += cl;
}
return 0;
}
static int
_e1_tx_hdlcfs(struct e1_ts *ts, uint8_t *buf, int len)
{
int rv, oo, cl;
oo = 0;
while (oo < len) {
/* Pending message ? */
if (!ts->tx_len) {
rv = read(ts->fd, ts->tx_buf, sizeof(ts->tx_buf));
if (rv > 0) {
printf("TX Message: %d %d [ %s]\n", ts->id, rv, osmo_hexdump(ts->tx_buf, rv));
ts->tx_len = rv;
ts->tx_ofs = 0;
}
}
/* */
rv = osmo_isdnhdlc_encode(&ts->hdlc_tx,
&ts->tx_buf[ts->tx_ofs], ts->tx_len - ts->tx_ofs, &cl,
&buf[oo], len - oo
);
if (rv < 0)
printf("ERR TX: %d\n", rv);
if (ts->tx_ofs < ts->tx_len)
printf("TX chunk %d/%d %d [ %s]\n", ts->tx_ofs, ts->tx_len, cl, osmo_hexdump(&buf[ts->tx_ofs], rv));
if (rv > 0)
oo += rv;
ts->tx_ofs += cl;
if (ts->tx_ofs >= ts->tx_len) {
ts->tx_len = 0;
ts->tx_ofs = 0;
}
}
return len;
}
static int
e1_usb_xfer_in(struct e1_usb_flow *flow, uint8_t *buf, int size)
{
struct e1_line *line = flow->line;
int ftr;
if (size <= 0) {
printf("IN ERROR: %d\n", size);
return -1;
}
ftr = (size - 4) / 32;
for (int tsn=1; tsn<32; tsn++)
{
struct e1_ts *ts = &line->ts[tsn];
uint8_t buf_ts[32];
if (ts->mode == E1_TS_MODE_OFF)
continue;
for (int i=0; i<ftr; i++)
buf_ts[i] = buf[4+tsn+(i*32)];
switch (ts->mode) {
case E1_TS_MODE_RAW:
write(ts->fd, buf_ts, ftr);
break;
case E1_TS_MODE_HDLCFCS:
_e1_rx_hdlcfs(ts, buf_ts, ftr);
break;
default:
continue;
}
}
return 0;
}
static int
e1_usb_xfer_out(struct e1_usb_flow *flow, uint8_t *buf, int size)
{
struct e1_line *line = flow->line;
struct e1_usb_line_data *ld = (struct e1_usb_line_data *) line->drv_data;
int fts, tsz;
if (size <= 0) {
printf("OUT ERROR: %d\n", size);
return -1;
}
/* Flow regulation */
ld->r_acc += ld->r_sw;
fts = ld->r_acc >> 10;
if (fts < 4) fts = 4;
else if (fts > 12) fts = 12;
ld->r_acc -= fts << 10;
if (ld->r_acc & 0x80000000)
ld->r_acc = 0;
/* Prepare */
tsz = 4 + 32 * fts;
memset(buf, 0xff, tsz);
/* Header */
/* FIXME */
/* Scan timeslots */
for (int tsn=1; tsn<32; tsn++)
{
struct e1_ts *ts = &line->ts[tsn];
uint8_t buf_ts[32];
int l;
if (ts->mode == E1_TS_MODE_OFF)
continue;
switch (ts->mode) {
case E1_TS_MODE_RAW:
l = read(ts->fd, buf_ts, fts);
break;
case E1_TS_MODE_HDLCFCS:
l = _e1_tx_hdlcfs(ts, buf_ts, fts);
break;
default:
continue;
}
if (l <= 0)
continue;
for (int i=0; i<l; i++)
buf[4+tsn+(i*32)] = buf_ts[i];
}
return tsz;
}
static int
e1_usb_xfer_fb(struct e1_usb_flow *flow, uint8_t *buf, int size)
{
struct e1_usb_line_data *ld = (struct e1_usb_line_data *) flow->line->drv_data;
if (size < 0) {
LOGP(DE1D, LOGL_ERROR, "Feedback transfer error\n");
return 0;
} else if (size != 3) {
LOGP(DE1D, LOGL_ERROR, "Feedback packet invalid size (%d)\n", size);
return 0;
}
ld->r_sw = (buf[2] << 16) | (buf[1] << 8) | buf[0];
return 0;
}
// ---------------------------------------------------------------------------
// USB flow
// ---------------------------------------------------------------------------
static void LIBUSB_CALL
_e1uf_xfr(struct libusb_transfer *xfr)
{
struct e1_usb_flow *flow = (struct e1_usb_flow *) xfr->user_data;
struct e1_usb_intf_data *id = (struct e1_usb_intf_data *) flow->line->intf->drv_data;
int j, rv, len;
len = 0;
/* FIXME: Check transfer status ? Error handling ? */
if (flow->ep & 0x80) {
for (j=0; j<flow->ppx; j++) {
flow->cb(flow,
libusb_get_iso_packet_buffer_simple(xfr, j),
(xfr->iso_packet_desc[j].status == LIBUSB_TRANSFER_COMPLETED) ?
xfr->iso_packet_desc[j].actual_length : -1
);
len += (xfr->iso_packet_desc[j].length = flow->size);
}
} else {
for (j=0; j<flow->ppx; j++)
len += (xfr->iso_packet_desc[j].length = flow->cb(flow, &xfr->buffer[len], flow->size));
}
libusb_fill_iso_transfer(xfr, id->devh, flow->ep,
xfr->buffer, len, flow->ppx,
_e1uf_xfr, flow, 0
);
rv = libusb_submit_transfer(xfr);
if (rv)
LOGP(DE1D, LOGL_ERROR, "Failed to resubmit buffer for transfer\n");
}
static struct e1_usb_flow *
e1uf_create(struct e1_line *line, xfer_cb_t cb,
int ep, int count, int size, int ppx)
{
void *ctx = line->intf->e1d->ctx;
struct e1_usb_flow *flow;
flow = talloc_zero(ctx, struct e1_usb_flow);
OSMO_ASSERT(flow);
flow->line = line;
flow->cb = cb;
flow->ep = ep;
flow->count = count;
flow->size = size;
flow->ppx = ppx;
flow->entries = talloc_zero_size(ctx, count * sizeof(struct e1_usb_flow_entry));
for (int i=0; i<count; i++)
flow->entries[i].buf = talloc_zero_size(ctx, size * ppx);
return flow;
}
static void
e1uf_destroy(struct e1_usb_flow *flow)
{
if (!flow)
return;
/* FIXME: stop pending transfers */
for (int i=0; i<flow->count; i++)
talloc_free(flow->entries[i].buf);
talloc_free(flow->entries);
talloc_free(flow);
}
static int
e1uf_start(struct e1_usb_flow *flow)
{
struct e1_usb_intf_data *id = (struct e1_usb_intf_data *) flow->line->intf->drv_data;
struct libusb_transfer *xfr;
int i, j, rv, len;
for (i=0; i<flow->count; i++)
{
xfr = libusb_alloc_transfer(flow->ppx);
if (!xfr)
return -ENOMEM;
len = 0;
if (flow->ep & 0x80) {
for (j=0; j<flow->ppx; j++)
len += (xfr->iso_packet_desc[j].length = flow->size);
} else {
for (j=0; j<flow->ppx; j++)
len += (xfr->iso_packet_desc[j].length = flow->cb(flow, &flow->entries[i].buf[len], flow->size));
}
libusb_fill_iso_transfer(xfr, id->devh, flow->ep,
flow->entries[i].buf, len, flow->ppx,
_e1uf_xfr, flow, 0
);
rv = libusb_submit_transfer(xfr);
if (rv)
return rv;
flow->entries[i].xfr = xfr;
}
return 0;
}
// ---------------------------------------------------------------------------
// e1d structures
// ---------------------------------------------------------------------------
struct e1_intf *
_e1_intf_new(struct e1_daemon *e1d, void *drv_data)
{
struct e1_intf *intf;
intf = talloc_zero(e1d->ctx, struct e1_intf);
OSMO_ASSERT(intf);
intf->e1d = e1d;
intf->drv_data = drv_data;
INIT_LLIST_HEAD(&intf->list);
INIT_LLIST_HEAD(&intf->lines);
if (!llist_empty(&e1d->interfaces)) {
struct e1_intf *f = llist_first_entry(&e1d->interfaces, struct e1_intf, list);
intf->id = f->id + 1;
}
llist_add(&intf->list, &e1d->interfaces);
return intf;
}
struct e1_line *
_e1_line_new(struct e1_intf *intf, void *drv_data)
{
struct e1_line *line;
line = talloc_zero(intf->e1d->ctx, struct e1_line);
OSMO_ASSERT(line);
line->intf = intf;
line->drv_data = drv_data;
for (int i=0; i<32; i++)
line->ts[i].id = i;
INIT_LLIST_HEAD(&line->list);
if (!llist_empty(&intf->lines)) {
struct e1_line *l = llist_first_entry(&intf->lines, struct e1_line, list);
line->id = l->id + 1;
}
llist_add(&line->list, &intf->lines);
return line;
}
// ---------------------------------------------------------------------------
// Init / Probing
// ---------------------------------------------------------------------------
int
_e1_usb_open_device(struct e1_daemon *e1d, struct libusb_device *dev)
{
struct e1_intf *intf;
struct e1_line *line;
struct e1_usb_intf_data *intf_data;
struct e1_usb_line_data *line_data;
struct libusb_config_descriptor *cd;
const struct libusb_interface_descriptor *id;
libusb_device_handle *devh;
int i, j, ret;
ret = libusb_open(dev, &devh);
if (ret) {
LOGP(DE1D, LOGL_ERROR, "Failed to open usb device\n");
return ret;
}
intf_data = talloc_zero(e1d->ctx, struct e1_usb_intf_data);
intf_data->devh = devh;
intf = _e1_intf_new(e1d, intf_data);
ret = libusb_get_active_config_descriptor(dev, &cd);
if (ret) {
LOGP(DE1D, LOGL_ERROR, "Failed to talk to usb device\n");
return ret;
}
for (i=0; i<cd->bNumInterfaces; i++) {
/* Expect 2 altsettings with proper class/subclass/eps */
if (cd->interface[i].num_altsetting != 2)
continue;
id = &cd->interface[i].altsetting[1];
if ((id->bInterfaceClass != 0xff) || (id->bInterfaceSubClass != 0xe1) || (id->bNumEndpoints != 3))
continue;
/* Get interface and set it up */
ret = libusb_claim_interface(devh, id->bInterfaceNumber);
if (ret) {
LOGP(DE1D, LOGL_ERROR, "Failed to claim interface %d\n", id->bInterfaceNumber);
return ret;
}
ret = libusb_set_interface_alt_setting(devh, id->bInterfaceNumber, 1);
if (ret) {
LOGP(DE1D, LOGL_ERROR, "Failed to set interface %d altsetting\n", id->bInterfaceNumber);
return ret;
}
/* Setup driver data and find endpoints */
line_data = talloc_zero(e1d->ctx, struct e1_usb_line_data);
line_data->if_num = id->bInterfaceNumber;
line_data->r_acc = 0;
line_data->r_sw = 8192;
for (j=0; j<id->bNumEndpoints; j++) {
if (id->endpoint[j].bmAttributes == 0x11) {
line_data->ep_fb = id->endpoint[j].bEndpointAddress;
} else if (id->endpoint[j].bmAttributes == 0x05) {
if (id->endpoint[j].bEndpointAddress & 0x80)
line_data->ep_in = id->endpoint[j].bEndpointAddress;
else
line_data->ep_out = id->endpoint[j].bEndpointAddress;
if (!line_data->pkt_size)
line_data->pkt_size = id->endpoint[j].wMaxPacketSize;
else if (line_data->pkt_size != id->endpoint[j].wMaxPacketSize)
LOGP(DE1D, LOGL_ERROR, "Inconsistent max packet size %d vs %d\n",
line_data->pkt_size, (int)id->endpoint[j].wMaxPacketSize);
} else {
LOGP(DE1D, LOGL_ERROR, "Invalid EP %02x\n", id->endpoint[j].bEndpointAddress);
}
}
if (!line_data->ep_in || !line_data->ep_out || !line_data->ep_fb || !line_data->pkt_size) {
LOGP(DE1D, LOGL_ERROR, "Failed to use interface %d\n", id->bInterfaceNumber);
return -EINVAL;
}
line = _e1_line_new(intf, line_data);
line_data->flow_in = e1uf_create(line, e1_usb_xfer_in, line_data->ep_in, 2, line_data->pkt_size, 4);
line_data->flow_out = e1uf_create(line, e1_usb_xfer_out, line_data->ep_out, 2, line_data->pkt_size, 4);
line_data->flow_fb = e1uf_create(line, e1_usb_xfer_fb, line_data->ep_fb, 2, 8, 1);
e1uf_start(line_data->flow_in);
e1uf_start(line_data->flow_out);
e1uf_start(line_data->flow_fb);
}
return 0;
}
int
e1_usb_probe(struct e1_daemon *e1d)
{
struct libusb_device **dev_list;
ssize_t n_dev;
int i, ret;
if (!g_usb) {
ret = libusb_init(&g_usb);
if (ret) {
LOGP(DE1D, LOGL_ERROR, "Failed to initialize libusb\n");
return -EIO;
}
}
n_dev = libusb_get_device_list(g_usb, &dev_list);
if (n_dev < 0) {
LOGP(DE1D, LOGL_ERROR, "Failed to list devices\n");
return -EIO;
}
for (i=0; i<n_dev; i++) {
struct libusb_device_descriptor desc;
ret = libusb_get_device_descriptor(dev_list[i], &desc);
if (ret)
continue;
if ((desc.idVendor != USB_VID) || (desc.idProduct != USB_PID))
continue;
_e1_usb_open_device(e1d, dev_list[i]);
}
libusb_free_device_list(dev_list, 1);
return 0;
}
int
e1_usb_poll(void)
{
int rv;
rv = libusb_handle_events(g_usb);
if (rv != LIBUSB_SUCCESS)
return -EIO;
return 0;
}