diff options
| author | Sylvain Munaut <tnt@246tNt.com> | 2013-01-16 22:50:04 +0100 |
|---|---|---|
| committer | Sylvain Munaut <tnt@246tNt.com> | 2013-01-16 23:12:00 +0100 |
| commit | eeafd9fa5bf2f700ec18cfbbc71aa61ed99f51ee (patch) | |
| tree | fbf2affd4e339ed71fbb996e8102dde275e83e58 | |
| parent | 5b779709914925a2e9973f53054b632b582c0085 (diff) | |
host/layer23: Initial import of the transceiver application
Build is optional because it depends on some extra libraries
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
21 files changed, 2824 insertions, 0 deletions
diff --git a/src/host/layer23/configure.ac b/src/host/layer23/configure.ac index 9335e66e..1ff1bb70 100644 --- a/src/host/layer23/configure.ac +++ b/src/host/layer23/configure.ac @@ -21,6 +21,13 @@ AC_CHECK_LIB(gps, gps_waiting, LIBGPS_CFLAGS=" -D_HAVE_GPSD" LIBGPS_LIBS=" -lgps AC_SUBST([LIBGPS_CFLAGS]) AC_SUBST([LIBGPS_LIBS]) +dnl Optional transceiver +AC_ARG_ENABLE([transceiver], [AS_HELP_STRING([--enable-transceiver], [Build the transceiver application])], + [osmo_ac_build_transceiver="$enableval"]) +if test "$osmo_ac_build_transceiver" = "yes" ; then + PKG_CHECK_MODULES(LIBOSMODSP, libosmodsp) +fi +AM_CONDITIONAL(BUILD_TRANSCEIVER, test "x$osmo_ac_build_transceiver" = "xyes") dnl checks for header files AC_HEADER_STDC @@ -32,6 +39,7 @@ AC_OUTPUT( src/common/Makefile src/misc/Makefile src/mobile/Makefile + src/transceiver/Makefile include/Makefile include/osmocom/Makefile include/osmocom/bb/Makefile diff --git a/src/host/layer23/include/osmocom/bb/common/logging.h b/src/host/layer23/include/osmocom/bb/common/logging.h index 3efa57a5..2ea83b1e 100644 --- a/src/host/layer23/include/osmocom/bb/common/logging.h +++ b/src/host/layer23/include/osmocom/bb/common/logging.h @@ -22,6 +22,8 @@ enum { DSUM, DSIM, DGPS, + DTRX, + DAPP, }; extern const struct log_info log_info; diff --git a/src/host/layer23/src/Makefile.am b/src/host/layer23/src/Makefile.am index 58a5f7fb..c46548c3 100644 --- a/src/host/layer23/src/Makefile.am +++ b/src/host/layer23/src/Makefile.am @@ -1 +1,5 @@ SUBDIRS = common misc mobile + +if BUILD_TRANSCEIVER +SUBDIRS += transceiver +endif diff --git a/src/host/layer23/src/common/logging.c b/src/host/layer23/src/common/logging.c index d8fd076b..109dc384 100644 --- a/src/host/layer23/src/common/logging.c +++ b/src/host/layer23/src/common/logging.c @@ -127,6 +127,18 @@ static const struct log_info_cat default_categories[] = { .color = "\033[1;35m", .enabled = 1, .loglevel = LOGL_DEBUG, }, + [DTRX] = { + .name = "TRX", + .description = "TRX interface", + .color = "\033[1;36m", + .enabled = 1, .loglevel = LOGL_DEBUG, + }, + [DAPP] = { + .name = "APP", + .description = "Application", + .color = "\033[1;35m", + .enabled = 1, .loglevel = LOGL_DEBUG, + }, }; const struct log_info log_info = { diff --git a/src/host/layer23/src/transceiver/LICENSE b/src/host/layer23/src/transceiver/LICENSE new file mode 100644 index 00000000..dba13ed2 --- /dev/null +++ b/src/host/layer23/src/transceiver/LICENSE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +our General Public Licenses are intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +them if you wish), that you receive source code or can get it if you +want it, that you can change the software or use pieces of it in new +free programs, and that you know you can do these things. + + Developers that use our General Public Licenses protect your rights +with two steps: (1) assert copyright on the software, and (2) offer +you this License which gives you legal permission to copy, distribute +and/or modify the software. + + A secondary benefit of defending all users' freedom is that +improvements made in alternate versions of the program, if they +receive widespread use, become available for other developers to +incorporate. Many developers of free software are heartened and +encouraged by the resulting cooperation. However, in the case of +software used on network servers, this result may fail to come about. +The GNU General Public License permits making a modified version and +letting the public access it on a server without ever releasing its +source code to the public. + + The GNU Affero General Public License is designed specifically to +ensure that, in such cases, the modified source code becomes available +to the community. It requires the operator of a network server to +provide the source code of the modified version running there to the +users of that server. Therefore, public use of a modified version, on +a publicly accessible server, gives the public access to the source +code of the modified version. + + An older license, called the Affero General Public License and +published by Affero, was designed to accomplish similar goals. This is +a different license, not a version of the Affero GPL, but Affero has +released a new version of the Affero GPL which permits relicensing under +this license. + + The precise terms and conditions for copying, distribution and +modification follow. + + TERMS AND CONDITIONS + + 0. Definitions. + + "This License" refers to version 3 of the GNU Affero General Public License. + + "Copyright" also means copyright-like laws that apply to other kinds of +works, such as semiconductor masks. + + "The Program" refers to any copyrightable work licensed under this +License. Each licensee is addressed as "you". "Licensees" and +"recipients" may be individuals or organizations. + + To "modify" a work means to copy from or adapt all or part of the work +in a fashion requiring copyright permission, other than the making of an +exact copy. The resulting work is called a "modified version" of the +earlier work or a work "based on" the earlier work. + + A "covered work" means either the unmodified Program or a work based +on the Program. + + To "propagate" a work means to do anything with it that, without +permission, would make you directly or secondarily liable for +infringement under applicable copyright law, except executing it on a +computer or modifying a private copy. Propagation includes copying, +distribution (with or without modification), making available to the +public, and in some countries other activities as well. + + To "convey" a work means any kind of propagation that enables other +parties to make or receive copies. Mere interaction with a user through +a computer network, with no transfer of a copy, is not conveying. + + An interactive user interface displays "Appropriate Legal Notices" +to the extent that it includes a convenient and prominently visible +feature that (1) displays an appropriate copyright notice, and (2) +tells the user that there is no warranty for the work (except to the +extent that warranties are provided), that licensees may convey the +work under this License, and how to view a copy of this License. If +the interface presents a list of user commands or options, such as a +menu, a prominent item in the list meets this criterion. + + 1. Source Code. + + The "source code" for a work means the preferred form of the work +for making modifications to it. "Object code" means any non-source +form of a work. + + A "Standard Interface" means an interface that either is an official +standard defined by a recognized standards body, or, in the case of +interfaces specified for a particular programming language, one that +is widely used among developers working in that language. + + The "System Libraries" of an executable work include anything, other +than the work as a whole, that (a) is included in the normal form of +packaging a Major Component, but which is not part of that Major +Component, and (b) serves only to enable use of the work with that +Major Component, or to implement a Standard Interface for which an +implementation is available to the public in source code form. A +"Major Component", in this context, means a major essential component +(kernel, window system, and so on) of the specific operating system +(if any) on which the executable work runs, or a compiler used to +produce the work, or an object code interpreter used to run it. + + The "Corresponding Source" for a work in object code form means all +the source code needed to generate, install, and (for an executable +work) run the object code and to modify the work, including scripts to +control those activities. However, it does not include the work's +System Libraries, or general-purpose tools or generally available free +programs which are used unmodified in performing those activities but +which are not part of the work. For example, Corresponding Source +includes interface definition files associated with source files for +the work, and the source code for shared libraries and dynamically +linked subprograms that the work is specifically designed to require, +such as by intimate data communication or control flow between those +subprograms and other parts of the work. + + The Corresponding Source need not include anything that users +can regenerate automatically from other parts of the Corresponding +Source. + + The Corresponding Source for a work in source code form is that +same work. + + 2. Basic Permissions. + + All rights granted under this License are granted for the term of +copyright on the Program, and are irrevocable provided the stated +conditions are met. This License explicitly affirms your unlimited +permission to run the unmodified Program. The output from running a +covered work is covered by this License only if the output, given its +content, constitutes a covered work. This License acknowledges your +rights of fair use or other equivalent, as provided by copyright law. + + You may make, run and propagate covered works that you do not +convey, without conditions so long as your license otherwise remains +in force. You may convey covered works to others for the sole purpose +of having them make modifications exclusively for you, or provide you +with facilities for running those works, provided that you comply with +the terms of this License in conveying all material for which you do +not control copyright. Those thus making or running the covered works +for you must do so exclusively on your behalf, under your direction +and control, on terms that prohibit them from making any copies of +your copyrighted material outside their relationship with you. + + Conveying under any other circumstances is permitted solely under +the conditions stated below. Sublicensing is not allowed; section 10 +makes it unnecessary. + + 3. Protecting Users' Legal Rights From Anti-Circumvention Law. + + No covered work shall be deemed part of an effective technological +measure under any applicable law fulfilling obligations under article +11 of the WIPO copyright treaty adopted on 20 December 1996, or +similar laws prohibiting or restricting circumvention of such +measures. + + When you convey a covered work, you waive any legal power to forbid +circumvention of technological measures to the extent such circumvention +is effected by exercising rights under this License with respect to +the covered work, and you disclaim any intention to limit operation or +modification of the work as a means of enforcing, against the work's +users, your or third parties' legal rights to forbid circumvention of +technological measures. + + 4. Conveying Verbatim Copies. + + You may convey verbatim copies of the Program's source code as you +receive it, in any medium, provided that you conspicuously and +appropriately publish on each copy an appropriate copyright notice; +keep intact all notices stating that this License and any +non-permissive terms added in accord with section 7 apply to the code; +keep intact all notices of the absence of any warranty; and give all +recipients a copy of this License along with the Program. + + You may charge any price or no price for each copy that you convey, +and you may offer support or warranty protection for a fee. + + 5. Conveying Modified Source Versions. + + You may convey a work based on the Program, or the modifications to +produce it from the Program, in the form of source code under the +terms of section 4, provided that you also meet all of these conditions: + + a) The work must carry prominent notices stating that you modified + it, and giving a relevant date. + + b) The work must carry prominent notices stating that it is + released under this License and any conditions added under section + 7. This requirement modifies the requirement in section 4 to + "keep intact all notices". + + c) You must license the entire work, as a whole, under this + License to anyone who comes into possession of a copy. This + License will therefore apply, along with any applicable section 7 + additional terms, to the whole of the work, and all its parts, + regardless of how they are packaged. This License gives no + permission to license the work in any other way, but it does not + invalidate such permission if you have separately received it. + + d) If the work has interactive user interfaces, each must display + Appropriate Legal Notices; however, if the Program has interactive + interfaces that do not display Appropriate Legal Notices, your + work need not make them do so. + + A compilation of a covered work with other separate and independent +works, which are not by their nature extensions of the covered work, +and which are not combined with it such as to form a larger program, +in or on a volume of a storage or distribution medium, is called an +"aggregate" if the compilation and its resulting copyright are not +used to limit the access or legal rights of the compilation's users +beyond what the individual works permit. Inclusion of a covered work +in an aggregate does not cause this License to apply to the other +parts of the aggregate. + + 6. Conveying Non-Source Forms. + + You may convey a covered work in object code form under the terms +of sections 4 and 5, provided that you also convey the +machine-readable Corresponding Source under the terms of this License, +in one of these ways: + + a) Convey the object code in, or embodied in, a physical product + (including a physical distribution medium), accompanied by the + Corresponding Source fixed on a durable physical medium + customarily used for software interchange. + + b) Convey the object code in, or embodied in, a physical product + (including a physical distribution medium), accompanied by a + written offer, valid for at least three years and valid for as + long as you offer spare parts or customer support for that product + model, to give anyone who possesses the object code either (1) a + copy of the Corresponding Source for all the software in the + product that is covered by this License, on a durable physical + medium customarily used for software interchange, for a price no + more than your reasonable cost of physically performing this + conveying of source, or (2) access to copy the + Corresponding Source from a network server at no charge. + + c) Convey individual copies of the object code with a copy of the + written offer to provide the Corresponding Source. This + alternative is allowed only occasionally and noncommercially, and + only if you received the object code with such an offer, in accord + with subsection 6b. + + d) Convey the object code by offering access from a designated + place (gratis or for a charge), and offer equivalent access to the + Corresponding Source in the same way through the same place at no + further charge. You need not require recipients to copy the + Corresponding Source along with the object code. If the place to + copy the object code is a network server, the Corresponding Source + may be on a different server (operated by you or a third party) + that supports equivalent copying facilities, provided you maintain + clear directions next to the object code saying where to find the + Corresponding Source. Regardless of what server hosts the + Corresponding Source, you remain obligated to ensure that it is + available for as long as needed to satisfy these requirements. + + e) Convey the object code using peer-to-peer transmission, provided + you inform other peers where the object code and Corresponding + Source of the work are being offered to the general public at no + charge under subsection 6d. + + A separable portion of the object code, whose source code is excluded +from the Corresponding Source as a System Library, need not be +included in conveying the object code work. + + A "User Product" is either (1) a "consumer product", which means any +tangible personal property which is normally used for personal, family, +or household purposes, or (2) anything designed or sold for incorporation +into a dwelling. In determining whether a product is a consumer product, +doubtful cases shall be resolved in favor of coverage. For a particular +product received by a particular user, "normally used" refers to a +typical or common use of that class of product, regardless of the status +of the particular user or of the way in which the particular user +actually uses, or expects or is expected to use, the product. A product +is a consumer product regardless of whether the product has substantial +commercial, industrial or non-consumer uses, unless such uses represent +the only significant mode of use of the product. + + "Installation Information" for a User Product means any methods, +procedures, authorization keys, or other information required to install +and execute modified versions of a covered work in that User Product from +a modified version of its Corresponding Source. The information must +suffice to ensure that the continued functioning of the modified object +code is in no case prevented or interfered with solely because +modification has been made. + + If you convey an object code work under this section in, or with, or +specifically for use in, a User Product, and the conveying occurs as +part of a transaction in which the right of possession and use of the +User Product is transferred to the recipient in perpetuity or for a +fixed term (regardless of how the transaction is characterized), the +Corresponding Source conveyed under this section must be accompanied +by the Installation Information. But this requirement does not apply +if neither you nor any third party retains the ability to install +modified object code on the User Product (for example, the work has +been installed in ROM). + + The requirement to provide Installation Information does not include a +requirement to continue to provide support service, warranty, or updates +for a work that has been modified or installed by the recipient, or for +the User Product in which it has been modified or installed. Access to a +network may be denied when the modification itself materially and +adversely affects the operation of the network or violates the rules and +protocols for communication across the network. + + Corresponding Source conveyed, and Installation Information provided, +in accord with this section must be in a format that is publicly +documented (and with an implementation available to the public in +source code form), and must require no special password or key for +unpacking, reading or copying. + + 7. Additional Terms. + + "Additional permissions" are terms that supplement the terms of this +License by making exceptions from one or more of its conditions. +Additional permissions that are applicable to the entire Program shall +be treated as though they were included in this License, to the extent +that they are valid under applicable law. If additional permissions +apply only to part of the Program, that part may be used separately +under those permissions, but the entire Program remains governed by +this License without regard to the additional permissions. + + When you convey a copy of a covered work, you may at your option +remove any additional permissions from that copy, or from any part of +it. (Additional permissions may be written to require their own +removal in certain cases when you modify the work.) You may place +additional permissions on material, added by you to a covered work, +for which you have or can give appropriate copyright permission. + + Notwithstanding any other provision of this License, for material you +add to a covered work, you may (if authorized by the copyright holders of +that material) supplement the terms of this License with terms: + + a) Disclaiming warranty or limiting liability differently from the + terms of sections 15 and 16 of this License; or + + b) Requiring preservation of specified reasonable legal notices or + author attributions in that material or in the Appropriate Legal + Notices displayed by works containing it; or + + c) Prohibiting misrepresentation of the origin of that material, or + requiring that modified versions of such material be marked in + reasonable ways as different from the original version; or + + d) Limiting the use for publicity purposes of names of licensors or + authors of the material; or + + e) Declining to grant rights under trademark law for use of some + trade names, trademarks, or service marks; or + + f) Requiring indemnification of licensors and authors of that + material by anyone who conveys the material (or modified versions of + it) with contractual assumptions of liability to the recipient, for + any liability that these contractual assumptions directly impose on + those licensors and authors. + + All other non-permissive additional terms are considered "further +restrictions" within the meaning of section 10. If the Program as you +received it, or any part of it, contains a notice stating that it is +governed by this License along with a term that is a further +restriction, you may remove that term. If a license document contains +a further restriction but permits relicensing or conveying under this +License, you may add to a covered work material governed by the terms +of that license document, provided that the further restriction does +not survive such relicensing or conveying. + + If you add terms to a covered work in accord with this section, you +must place, in the relevant source files, a statement of the +additional terms that apply to those files, or a notice indicating +where to find the applicable terms. + + Additional terms, permissive or non-permissive, may be stated in the +form of a separately written license, or stated as exceptions; +the above requirements apply either way. + + 8. Termination. + + You may not propagate or modify a covered work except as expressly +provided under this License. Any attempt otherwise to propagate or +modify it is void, and will automatically terminate your rights under +this License (including any patent licenses granted under the third +paragraph of section 11). + + However, if you cease all violation of this License, then your +license from a particular copyright holder is reinstated (a) +provisionally, unless and until the copyright holder explicitly and +finally terminates your license, and (b) permanently, if the copyright +holder fails to notify you of the violation by some reasonable means +prior to 60 days after the cessation. + + Moreover, your license from a particular copyright holder is +reinstated permanently if the copyright holder notifies you of the +violation by some reasonable means, this is the first time you have +received notice of violation of this License (for any work) from that +copyright holder, and you cure the violation prior to 30 days after +your receipt of the notice. + + Termination of your rights under this section does not terminate the +licenses of parties who have received copies or rights from you under +this License. If your rights have been terminated and not permanently +reinstated, you do not qualify to receive new licenses for the same +material under section 10. + + 9. Acceptance Not Required for Having Copies. + + You are not required to accept this License in order to receive or +run a copy of the Program. Ancillary propagation of a covered work +occurring solely as a consequence of using peer-to-peer transmission +to receive a copy likewise does not require acceptance. However, +nothing other than this License grants you permission to propagate or +modify any covered work. These actions infringe copyright if you do +not accept this License. Therefore, by modifying or propagating a +covered work, you indicate your acceptance of this License to do so. + + 10. Automatic Licensing of Downstream Recipients. + + Each time you convey a covered work, the recipient automatically +receives a license from the original licensors, to run, modify and +propagate that work, subject to this License. You are not responsible +for enforcing compliance by third parties with this License. + + An "entity transaction" is a transaction transferring control of an +organization, or substantially all assets of one, or subdividing an +organization, or merging organizations. If propagation of a covered +work results from an entity transaction, each party to that +transaction who receives a copy of the work also receives whatever +licenses to the work the party's predecessor in interest had or could +give under the previous paragraph, plus a right to possession of the +Corresponding Source of the work from the predecessor in interest, if +the predecessor has it or can get it with reasonable efforts. + + You may not impose any further restrictions on the exercise of the +rights granted or affirmed under this License. For example, you may +not impose a license fee, royalty, or other charge for exercise of +rights granted under this License, and you may not initiate litigation +(including a cross-claim or counterclaim in a lawsuit) alleging that +any patent claim is infringed by making, using, selling, offering for +sale, or importing the Program or any portion of it. + + 11. Patents. + + A "contributor" is a copyright holder who authorizes use under this +License of the Program or a work on which the Program is based. The +work thus licensed is called the contributor's "contributor version". + + A contributor's "essential patent claims" are all patent claims +owned or controlled by the contributor, whether already acquired or +hereafter acquired, that would be infringed by some manner, permitted +by this License, of making, using, or selling its contributor version, +but do not include claims that would be infringed only as a +consequence of further modification of the contributor version. For +purposes of this definition, "control" includes the right to grant +patent sublicenses in a manner consistent with the requirements of +this License. + + Each contributor grants you a non-exclusive, worldwide, royalty-free +patent license under the contributor's essential patent claims, to +make, use, sell, offer for sale, import and otherwise run, modify and +propagate the contents of its contributor version. + + In the following three paragraphs, a "patent license" is any express +agreement or commitment, however denominated, not to enforce a patent +(such as an express permission to practice a patent or covenant not to +sue for patent infringement). To "grant" such a patent license to a +party means to make such an agreement or commitment not to enforce a +patent against the party. + + If you convey a covered work, knowingly relying on a patent license, +and the Corresponding Source of the work is not available for anyone +to copy, free of charge and under the terms of this License, through a +publicly available network server or other readily accessible means, +then you must either (1) cause the Corresponding Source to be so +available, or (2) arrange to deprive yourself of the benefit of the +patent license for this particular work, or (3) arrange, in a manner +consistent with the requirements of this License, to extend the patent +license to downstream recipients. "Knowingly relying" means you have +actual knowledge that, but for the patent license, your conveying the +covered work in a country, or your recipient's use of the covered work +in a country, would infringe one or more identifiable patents in that +country that you have reason to believe are valid. + + If, pursuant to or in connection with a single transaction or +arrangement, you convey, or propagate by procuring conveyance of, a +covered work, and grant a patent license to some of the parties +receiving the covered work authorizing them to use, propagate, modify +or convey a specific copy of the covered work, then the patent license +you grant is automatically extended to all recipients of the covered +work and works based on it. + + A patent license is "discriminatory" if it does not include within +the scope of its coverage, prohibits the exercise of, or is +conditioned on the non-exercise of one or more of the rights that are +specifically granted under this License. You may not convey a covered +work if you are a party to an arrangement with a third party that is +in the business of distributing software, under which you make payment +to the third party based on the extent of your activity of conveying +the work, and under which the third party grants, to any of the +parties who would receive the covered work from you, a discriminatory +patent license (a) in connection with copies of the covered work +conveyed by you (or copies made from those copies), or (b) primarily +for and in connection with specific products or compilations that +contain the covered work, unless you entered into that arrangement, +or that patent license was granted, prior to 28 March 2007. + + Nothing in this License shall be construed as excluding or limiting +any implied license or other defenses to infringement that may +otherwise be available to you under applicable patent law. + + 12. No Surrender of Others' Freedom. + + If conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot convey a +covered work so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you may +not convey it at all. For example, if you agree to terms that obligate you +to collect a royalty for further conveying from those to whom you convey +the Program, the only way you could satisfy both those terms and this +License would be to refrain entirely from conveying the Program. + + 13. Remote Network Interaction; Use with the GNU General Public License. + + Notwithstanding any other provision of this License, if you modify the +Program, your modified version must prominently offer all users +interacting with it remotely through a computer network (if your version +supports such interaction) an opportunity to receive the Corresponding +Source of your version by providing access to the Corresponding Source +from a network server at no charge, through some standard or customary +means of facilitating copying of software. This Corresponding Source +shall include the Corresponding Source for any work covered by version 3 +of the GNU General Public License that is incorporated pursuant to the +following paragraph. + + Notwithstanding any other provision of this License, you have +permission to link or combine any covered work with a work licensed +under version 3 of the GNU General Public License into a single +combined work, and to convey the resulting work. The terms of this +License will continue to apply to the part which is the covered work, +but the work with which it is combined will remain governed by version +3 of the GNU General Public License. + + 14. Revised Versions of this License. + + The Free Software Foundation may publish revised and/or new versions of +the GNU Affero General Public License from time to time. Such new versions +will be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + + Each version is given a distinguishing version number. If the +Program specifies that a certain numbered version of the GNU Affero General +Public License "or any later version" applies to it, you have the +option of following the terms and conditions either of that numbered +version or of any later version published by the Free Software +Foundation. If the Program does not specify a version number of the +GNU Affero General Public License, you may choose any version ever published +by the Free Software Foundation. + + If the Program specifies that a proxy can decide which future +versions of the GNU Affero General Public License can be used, that proxy's +public statement of acceptance of a version permanently authorizes you +to choose that version for the Program. + + Later license versions may give you additional or different +permissions. However, no additional obligations are imposed on any +author or copyright holder as a result of your choosing to follow a +later version. + + 15. Disclaimer of Warranty. + + THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY +APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT +HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY +OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, +THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM +IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF +ALL NECESSARY SERVICING, REPAIR OR CORRECTION. + + 16. Limitation of Liability. + + IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS +THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY +GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE +USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF +DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD +PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), +EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF +SUCH DAMAGES. + + 17. Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Affero 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 Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +<http://www.gnu.org/licenses/>. diff --git a/src/host/layer23/src/transceiver/Makefile.am b/src/host/layer23/src/transceiver/Makefile.am new file mode 100644 index 00000000..e40101da --- /dev/null +++ b/src/host/layer23/src/transceiver/Makefile.am @@ -0,0 +1,6 @@ +AM_CFLAGS = -Wall $(all_includes) -I$(top_srcdir)/include $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS) $(LIBSOSMODSP_CFLAGS) +LDADD = ../common/liblayer23.a $(LIBOSMOCORE_LIBS) $(LIBOSMOVTY_LIBS) $(LIBOSMOGSM_LIBS) $(LIBOSMOCODEC_LIBS) $(LIBOSMODSP_LIBS) + +bin_PROGRAMS = transceiver + +transceiver_SOURCES = main.c l1ctl_link.c l1ctl.c trx.c gmsk.c gsm_ab.c demod.c ../common/logging.c diff --git a/src/host/layer23/src/transceiver/app.h b/src/host/layer23/src/transceiver/app.h new file mode 100644 index 00000000..ba72f266 --- /dev/null +++ b/src/host/layer23/src/transceiver/app.h @@ -0,0 +1,58 @@ +/* + * app.h + * + * Application state / defines + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __TRX_APP_H__ +#define __TRX_APP_H__ + + +#include <stdint.h> + +#include "l1ctl_link.h" + + +struct log_target; +struct trx; +struct osmo_gmsk_state; +struct osmo_gmsk_trainseq; + +struct app_state +{ + /* Logging */ + struct log_target *stderr_target; + + /* L1CTL link */ + struct l1ctl_link l1l; + + /* TRX link to OpenBTS */ + struct trx *trx; + + /* Signal processing */ + struct osmo_gmsk_state *gs; + struct osmo_gmsk_trainseq *train_ab; + + /* Options */ + uint16_t arfcn_sync; +}; + + +#endif /* __TRX_APP_H__ */ diff --git a/src/host/layer23/src/transceiver/burst.h b/src/host/layer23/src/transceiver/burst.h new file mode 100644 index 00000000..47ce1ab3 --- /dev/null +++ b/src/host/layer23/src/transceiver/burst.h @@ -0,0 +1,43 @@ +/* + * burst.h + * + * Burst format + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __TRX_BURST_H__ +#define __TRX_BURST_H__ + + +#include <stdint.h> + + +#define BURST_FB 0 +#define BURST_SB 1 +#define BURST_DUMMY 2 +#define BURST_NB 3 + +struct burst_data +{ + uint8_t type; /* BURST_??? */ + uint8_t data[15]; /* Only for NB */ +} __attribute__((packed)); + + +#endif /* __TRX_BURST_H__ */ diff --git a/src/host/layer23/src/transceiver/demod.c b/src/host/layer23/src/transceiver/demod.c new file mode 100644 index 00000000..45b0570a --- /dev/null +++ b/src/host/layer23/src/transceiver/demod.c @@ -0,0 +1,90 @@ +/* + * demod.c + * + * Demodulation routines for tranceiver + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <stdio.h> +#include <stdint.h> +#include <string.h> + +#include <osmocom/dsp/cxvec.h> +#include <osmocom/dsp/cxvec_math.h> + +#include <l1ctl_proto.h> + +#include "app.h" +#include "gmsk.h" +#include "gsm_ab.h" + +int +gsm_ab_ind_process(struct app_state *as, + struct l1ctl_bts_burst_ab_ind *bi, + sbit_t *data, float *toa_p) +{ + struct osmo_cxvec *burst = NULL; + sbit_t *bits = NULL; + float complex chan; + float toa; + int i, rv; + + /* Load burst */ + burst = osmo_cxvec_alloc(88); + burst->len = 88; + + for (i=0; i<88; i++) { + float f[2]; + f[0] = ((float)((char)bi->iq[(i<<1) ])) / 128.0f; + f[1] = ((float)((char)bi->iq[(i<<1)+1])) / 128.0f; + burst->data[i] = f[0] + f[1] * I; + } + + /* Normalize burst */ + osmo_cxvec_sig_normalize(burst, 1, 0.0f, burst); + + /* Detect potential RACH */ + rv = gsm_ab_detect(as->gs, as->train_ab, burst, 2.0f, &chan, &toa); + if (rv) + goto err; + + printf("TOA : %f\n", toa); + printf("chan : (%f %f) => %f\n", crealf(chan), cimagf(chan), cabsf(chan)); + + /* Demodulate */ + bits = gsm_ab_demodulate(as->gs, burst, chan, toa); + if (!bits) + goto err; + + /* Copy */ + memset(data, 0x00, 148); + memcpy(data, bits, GSM_AB_BITS); + + /* Print result */ + for (i=0; i<GSM_AB_BITS; i++) + printf("%d", !!(bits[i] & 0x80)); + printf("\n"); + + *toa_p = toa; + + return 0; + +err: + return -1; +} diff --git a/src/host/layer23/src/transceiver/demod.h b/src/host/layer23/src/transceiver/demod.h new file mode 100644 index 00000000..147e11f4 --- /dev/null +++ b/src/host/layer23/src/transceiver/demod.h @@ -0,0 +1,38 @@ +/* + * demod.h + * + * Demodulation routines for tranceiver + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __TRX_DEMOD_H__ +#define __TRX_DEMOD_H__ + + +#include <osmocom/core/bits.h> + +struct app_state; +struct l1ctl_bts_burst_ab_ind; + + +int gsm_ab_ind_process(struct app_state *as, + struct l1ctl_bts_burst_ab_ind *bi, sbit_t *data, float *toa_p); + + +#endif /* __TRX_DEMOD_H__ */ diff --git a/src/host/layer23/src/transceiver/gmsk.c b/src/host/layer23/src/transceiver/gmsk.c new file mode 100644 index 00000000..d21819fc --- /dev/null +++ b/src/host/layer23/src/transceiver/gmsk.c @@ -0,0 +1,289 @@ +/* + * gmsk.c + * + * GMSK modulation support + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <stdio.h> +#include <stdlib.h> + +#include <osmocom/dsp/cxvec.h> +#include <osmocom/dsp/cxvec_math.h> + +#include "gmsk.h" + + + +static struct osmo_cxvec * +osmo_gmsk_generate_pulse(int sym_len, int sps); + +static int +osmo_gmsk_generate_rotation_tables(int len, int sps, + struct osmo_cxvec **rot_fwd, + struct osmo_cxvec **rot_rev); + + +/* ------------------------------------------------------------------------ */ +/* GMSK State */ +/* ------------------------------------------------------------------------ */ + +struct osmo_gmsk_state * +osmo_gmsk_init(int sps) +{ + struct osmo_gmsk_state *gs; + + /* Base */ + gs = calloc(1, sizeof(struct osmo_gmsk_state)); + if (!gs) + return NULL; + + gs->sps = sps; + + /* GMSK pulse */ + gs->pulse = osmo_gmsk_generate_pulse(2, sps); + if (!gs->pulse) + goto error; + + /* Rotation fwd/rev */ + osmo_gmsk_generate_rotation_tables(160, sps, &gs->rot_fwd, &gs->rot_rev); + if (!gs->rot_fwd || !gs->rot_rev) + goto error; + + return gs; + +error: + osmo_gmsk_free(gs); + return NULL; +} + +void +osmo_gmsk_free(struct osmo_gmsk_state *gs) +{ + if (!gs) + return; + + if (gs->pulse) + osmo_cxvec_free(gs->pulse); + if (gs->rot_fwd) + osmo_cxvec_free(gs->rot_fwd); + if (gs->rot_rev) + osmo_cxvec_free(gs->rot_rev); + + free(gs); +} + + +/* ------------------------------------------------------------------------ */ +/* GMSK Modulation */ +/* ------------------------------------------------------------------------ */ + +/* Generate a GMSK pulse shape. + * - sym_len: length of ISI + * - sps: samples per symbol + */ +static struct osmo_cxvec * +osmo_gmsk_generate_pulse(int sym_len, int sps) +{ + struct osmo_cxvec *pulse; + int n = sps * sym_len + 1; /* length */ + int c = (n-1)/2; /* center idx */ + int i; + float avg; + + pulse = osmo_cxvec_alloc(n); + if (!pulse) + return NULL; + + pulse->len = n; + pulse->flags |= CXVEC_FLG_REAL_ONLY; + + avg = 0.0f; + + for (i=0; i<n; i++) { + float arg = (float)(i-c) / (float)sps; + float arg2 = arg * arg; + float v; + v = 0.96 * expf( -1.1380 * arg2 - 0.527 * arg2 * arg2); /* GSM pulse approx */ + avg += v * v; + pulse->data[i] = v; + } + + avg = sqrtf(avg); + + for (i=0; i<n; i++) + pulse->data[i] /= avg; + + return pulse; +} + +static int +osmo_gmsk_generate_rotation_tables( + int len, int sps, + struct osmo_cxvec **rot_fwd, struct osmo_cxvec **rot_rev) +{ + struct osmo_cxvec *rf, *rr; + float phase; + int i; + + rf = osmo_cxvec_alloc(160 * sps); + rr = osmo_cxvec_alloc(160 * sps); + + if (!rf || !rr) + return -1; + + phase = 0.0f; + + for (i=0; i<160*sps; i++) { + rf->data[i] = cexp( I * phase); + rr->data[i] = cexp(- I * phase); + phase += (M_PIf / 2.0f) / (float)sps; + } + + rf->len = 160 * sps; + rr->len = 160 * sps; + + *rot_fwd = rf; + *rot_rev = rr; + + return 0; +} + +void +osmo_gmsk_rotate_fwd(const struct osmo_gmsk_state *gs, struct osmo_cxvec *v) +{ + int i; + + if (v->flags & CXVEC_FLG_REAL_ONLY) { + for (i=0; i<v->len; i++) + v->data[i] = gs->rot_fwd->data[i] * crealf(v->data[i]); + } else { + for (i=0; i<v->len; i++) + v->data[i] = gs->rot_fwd->data[i] * v->data[i]; + } + + v->flags &= ~CXVEC_FLG_REAL_ONLY; +} + +void +osmo_gmsk_rotate_rev(const struct osmo_gmsk_state *gs, struct osmo_cxvec *v) +{ + int i; + + if (v->flags & CXVEC_FLG_REAL_ONLY) { + for (i=0; i<v->len; i++) + v->data[i] = gs->rot_rev->data[i] * crealf(v->data[i]); + } else { + for (i=0; i<v->len; i++) + v->data[i] = gs->rot_rev->data[i] * v->data[i]; + } + + v->flags &= ~CXVEC_FLG_REAL_ONLY; +} + +struct osmo_cxvec * +osmo_gmsk_modulate_burst(const struct osmo_gmsk_state *gs, + const ubit_t *data, int data_len, int guard_len) +{ + struct osmo_cxvec *mod_burst, *shaped_burst; + int burst_size = gs->sps * (data_len + guard_len); + int i; + + /* Alloc mod_burst */ + mod_burst = osmo_cxvec_alloc(burst_size); + if (!mod_burst) + return NULL; + + /* Fill mod_burst */ + mod_burst->len = burst_size; + mod_burst->flags |= CXVEC_FLG_REAL_ONLY; + + for (i=0; i<burst_size; i++) + mod_burst->data[i] = 0.0f; + + for (i=0; i<data_len; i++) + mod_burst->data[i*gs->sps] = data[i] ? 1.0f : -1.0f; + + /* Rotate up by pi/2 */ + osmo_gmsk_rotate_fwd(gs, mod_burst); + + /* Filter with pulse shape */ + shaped_burst = osmo_cxvec_convolve(gs->pulse, mod_burst, CONV_NO_DELAY, NULL); + + /* Release mod_burst */ + osmo_cxvec_free(mod_burst); + + return shaped_burst; +} + + +/* ------------------------------------------------------------------------ */ +/* GMSK training sequence */ +/* ------------------------------------------------------------------------ */ + +struct osmo_gmsk_trainseq * +osmo_gmsk_trainseq_generate(struct osmo_gmsk_state *gs, const ubit_t *train, int len) +{ + struct osmo_gmsk_trainseq *gts; + struct osmo_cxvec *autocorr = NULL; + + gts = calloc(1, sizeof(struct osmo_gmsk_trainseq)); + if (!gts) + return NULL; + + gts->seq = osmo_gmsk_modulate_burst(gs, train, len, 0); + if (!gts->seq) + goto err; + + printf("%d\n", gts->seq->len); + + autocorr = osmo_cxvec_correlate(gts->seq, gts->seq, 1, NULL); + if (!autocorr) + goto err; + + gts->toa = osmo_cxvec_peak_energy_find(autocorr, 5, PEAK_EARLY_LATE, >s->gain); + + printf("%d\n", autocorr->len); + gts->gain = autocorr->data[0]; + + osmo_cxvec_free(autocorr); + + return gts; + +err: + if (gts) { + if (gts->seq) + osmo_cxvec_free(gts->seq); + free(gts); + } + + if (autocorr) + osmo_cxvec_free(autocorr); + + return NULL; +} + +void +osmo_gmsk_trainseq_free(struct osmo_gmsk_trainseq *gts) +{ + if (gts) { + osmo_cxvec_free(gts->seq); + free(gts); + } +} diff --git a/src/host/layer23/src/transceiver/gmsk.h b/src/host/layer23/src/transceiver/gmsk.h new file mode 100644 index 00000000..b9ca4e49 --- /dev/null +++ b/src/host/layer23/src/transceiver/gmsk.h @@ -0,0 +1,82 @@ +/* + * gmsk.h + * + * GMSK modulation support + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __OSMO_GMSK_H__ +#define __OSMO_GMSK_H__ + + +#include <complex.h> + +#include <osmocom/core/bits.h> + +struct osmo_cxvec; + + +/* GMSK precomputed state for a given sps */ +struct osmo_gmsk_state +{ + int sps; + struct osmo_cxvec *pulse; + struct osmo_cxvec *rot_fwd; + struct osmo_cxvec *rot_rev; +}; + + +/* State init & cleanup */ + +struct osmo_gmsk_state * +osmo_gmsk_init(int sps); + +void +osmo_gmsk_free(struct osmo_gmsk_state *gs); + + +/* Modulation */ + +void +osmo_gmsk_rotate_fwd(const struct osmo_gmsk_state *gs, struct osmo_cxvec *v); + +void +osmo_gmsk_rotate_rev(const struct osmo_gmsk_state *gs, struct osmo_cxvec *v); + +struct osmo_cxvec * +osmo_gmsk_modulate_burst(const struct osmo_gmsk_state *gs, + const ubit_t *data, int data_len, int guard_len); + + +/* Training sequences */ + +struct osmo_gmsk_trainseq { + struct osmo_cxvec *seq; + float complex gain; + float toa; +}; + +struct osmo_gmsk_trainseq * +osmo_gmsk_trainseq_generate(struct osmo_gmsk_state *gs, const ubit_t *train, int len); + +void +osmo_gmsk_trainseq_free(struct osmo_gmsk_trainseq *gts); + + +#endif /* __OSMO_GMSK_H__ */ diff --git a/src/host/layer23/src/transceiver/gsm_ab.c b/src/host/layer23/src/transceiver/gsm_ab.c new file mode 100644 index 00000000..903a5c3f --- /dev/null +++ b/src/host/layer23/src/transceiver/gsm_ab.c @@ -0,0 +1,105 @@ +/* + * gsm_ab.c + * + * GSM access burst SDR support + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> + +#include <osmocom/core/bits.h> + +#include <osmocom/dsp/cxvec.h> +#include <osmocom/dsp/cxvec_math.h> + +#include "gmsk.h" +#include "gsm_ab.h" + + +const ubit_t gsm_ab_train[] = { + 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, + 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, + 0, 0, 1, 1, 1, 1, 0, 0, 0, +}; + + +int +gsm_ab_detect(const struct osmo_gmsk_state *gs, + const struct osmo_gmsk_trainseq *rach, + const struct osmo_cxvec *burst, float thresh, + float complex *peak, float *toa) +{ + struct osmo_cxvec *cb = NULL; + int found = 0; + + cb = osmo_cxvec_correlate(rach->seq, burst, 1, NULL); + if (!cb) + return -ENOMEM; + + *toa = osmo_cxvec_peak_energy_find(cb, 5, PEAK_WEIGH_WIN_CENTER, peak); + if (*toa < 0.0 || *toa >= cb->len) + goto done; + + *toa = *toa - rach->toa - 8*gs->sps; + *peak = *peak / rach->gain; + + found = 1; + +done: + osmo_cxvec_free(cb); + + if (!found) { + *toa = 0.0f; + *peak = 1.0f; + } + + return !found; +} + +sbit_t * +gsm_ab_demodulate(struct osmo_gmsk_state *gs, + struct osmo_cxvec *burst, float complex channel, float toa) +{ + sbit_t *rv; + int i; + + /* Return vector */ + rv = malloc(GSM_AB_BITS * sizeof(sbit_t)); + if (!rv) + return NULL; + + /* Demod */ + osmo_cxvec_scale(burst, (1.0f / channel), burst); + osmo_cxvec_delay(burst, -toa, burst); + osmo_gmsk_rotate_rev(gs, burst); + + /* Mapping / Slicing */ + for (i=0; i<GSM_AB_BITS; i++) { + int v = (int)(-127.0f * crealf(burst->data[i*gs->sps])); + if (v > 127) + v = 127; + else if (v < -127) + v = -127; + rv[i] = v; + } + + return rv; +} diff --git a/src/host/layer23/src/transceiver/gsm_ab.h b/src/host/layer23/src/transceiver/gsm_ab.h new file mode 100644 index 00000000..dc6eb7de --- /dev/null +++ b/src/host/layer23/src/transceiver/gsm_ab.h @@ -0,0 +1,55 @@ +/* + * gsm_ab.h + * + * GSM access burst SDR support + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __OSMO_GSM_AB_H__ +#define __OSMO_GSM_AB_H__ + + +#include <complex.h> + +#include <osmocom/core/bits.h> + +struct osmo_gmsk_state; +struct osmo_gmsk_trainseq; +struct osmo_cxvec; + + +#define GSM_AB_TRAIN_LEN 41 +#define GSM_AB_BITS 88 /* 8 + 41 + 36 + 3 */ + +extern const ubit_t gsm_ab_train[]; + + +int +gsm_ab_detect(const struct osmo_gmsk_state *gs, + const struct osmo_gmsk_trainseq *rach, + const struct osmo_cxvec *burst, float thresh, + float complex *peak, float *toa); + +sbit_t * +gsm_ab_demodulate(struct osmo_gmsk_state *gs, + struct osmo_cxvec *burst, + float complex channel, float toa); + + +#endif /* __OSMO_GSM_AB_H__ */ diff --git a/src/host/layer23/src/transceiver/l1ctl.c b/src/host/layer23/src/transceiver/l1ctl.c new file mode 100644 index 00000000..e4cda24d --- /dev/null +++ b/src/host/layer23/src/transceiver/l1ctl.c @@ -0,0 +1,363 @@ +/* + * l1ctl.c + * + * Minimal L1CTL + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <stdlib.h> +#include <string.h> + +#include <osmocom/core/select.h> +#include <osmocom/core/talloc.h> + +#include <osmocom/bb/common/logging.h> + +#include <errno.h> +#include <arpa/inet.h> + +#include <osmocom/gsm/gsm_utils.h> + +#include <l1ctl_proto.h> + +#include "app.h" +#include "burst.h" +#include "demod.h" +#include "trx.h" + + +/* ------------------------------------------------------------------------ */ +/* L1CTL exported API */ +/* ------------------------------------------------------------------------ */ + +static struct msgb * +_l1ctl_alloc(uint8_t msg_type) +{ + struct l1ctl_hdr *l1h; + struct msgb *msg = msgb_alloc_headroom(256, 4, "osmo_l1"); + + if (!msg) { + LOGP(DL1C, LOGL_ERROR, "Failed to allocate memory.\n"); + return NULL; + } + + msg->l1h = msgb_put(msg, sizeof(*l1h)); + l1h = (struct l1ctl_hdr *) msg->l1h; + l1h->msg_type = msg_type; + + return msg; +} + +int +l1ctl_tx_reset_req(struct l1ctl_link *l1l, uint8_t type) +{ + struct msgb *msg; + struct l1ctl_reset *res; + + msg = _l1ctl_alloc(L1CTL_RESET_REQ); + if (!msg) + return -1; + + LOGP(DL1C, LOGL_INFO, "Tx Reset Req (%u)\n", type); + res = (struct l1ctl_reset *) msgb_put(msg, sizeof(*res)); + res->type = type; + + return l1l_send(l1l, msg); +} + +int +l1ctl_tx_fbsb_req(struct l1ctl_link *l1l, + uint16_t arfcn, uint8_t flags, uint16_t timeout, + uint8_t sync_info_idx, uint8_t ccch_mode) +{ + struct msgb *msg; + struct l1ctl_fbsb_req *req; + + LOGP(DL1C, LOGL_INFO, "Sync Req\n"); + + msg = _l1ctl_alloc(L1CTL_FBSB_REQ); + if (!msg) + return -1; + + req = (struct l1ctl_fbsb_req *) msgb_put(msg, sizeof(*req)); + req->band_arfcn = htons(arfcn); + req->timeout = htons(timeout); + /* Threshold when to consider FB_MODE1: 4kHz - 1kHz */ + req->freq_err_thresh1 = htons(11000 - 1000); + /* Threshold when to consider SCH: 1kHz - 200Hz */ + req->freq_err_thresh2 = htons(1000 - 200); + /* not used yet! */ + req->num_freqerr_avg = 3; + req->flags = flags; + req->sync_info_idx = sync_info_idx; + req->ccch_mode = ccch_mode; + + return l1l_send(l1l, msg); +} + +int +l1ctl_tx_bts_mode(struct l1ctl_link *l1l, + uint8_t enabled, uint8_t bsic, uint16_t band_arfcn) +{ + struct msgb *msg; + struct l1ctl_bts_mode *be; + + msg = _l1ctl_alloc(L1CTL_BTS_MODE); + if (!msg) + return -1; + + LOGP(DL1C, LOGL_INFO, "BTS Mode (enabled=%u, bsic=%u, arfcn=%u)\n", + enabled, bsic, band_arfcn); + + be = (struct l1ctl_bts_mode *) msgb_put(msg, sizeof(*be)); + be->enabled = enabled; + be->bsic = bsic; + be->band_arfcn = htons(band_arfcn); + + return l1l_send(l1l, msg); +} + +int +l1ctl_tx_bts_burst_req(struct l1ctl_link *l1l, + uint32_t fn, uint8_t tn, struct burst_data *burst) +{ + struct msgb *msg; + struct l1ctl_bts_burst_req *br; + + msg = _l1ctl_alloc(L1CTL_BTS_BURST_REQ); + if (!msg) + return -1; + + LOGP(DL1C, LOGL_INFO, "BTS Tx Burst (%d:%d)\n", fn, tn); + + br = (struct l1ctl_bts_burst_req *) msgb_put(msg, sizeof(*br)); + br->fn = htonl(fn); + br->tn = tn; + br->type = burst->type; + + if (burst->type == BURST_NB) + memcpy(msgb_put(msg, 15), burst->data, 15); + + return l1l_send(l1l, msg); +} + + +/* ------------------------------------------------------------------------ */ +/* L1CTL Receive handling */ +/* ------------------------------------------------------------------------ */ + +static int +_l1ctl_rx_bts_burst_nb_ind(struct app_state *as, struct msgb *msg) +{ + struct l1ctl_bts_burst_nb_ind *bi; + uint32_t fn; + int rc, i; + sbit_t data[148]; + float toa; + + bi = (struct l1ctl_bts_burst_nb_ind *) msg->l1h; + + if (msgb_l1len(msg) < sizeof(*bi)) { + LOGP(DL1C, LOGL_ERROR, "MSG too short Burst NB Ind: %u\n", + msgb_l2len(msg)); + rc = -EINVAL; + goto exit; + } + + fn = ntohl(bi->fn); + + LOGP(DL1C, LOGL_INFO, "Normal Burst Indication (fn=%d)\n", fn); + + memset(data, 0x00, 148); + + osmo_pbit2ubit_ext((ubit_t*)data, 3, bi->data, 0, 57, 0); + osmo_pbit2ubit_ext((ubit_t*)data, 88, bi->data, 57, 57, 0); + data[60] = data[87] = 1; + + for (i=0; i<148; i++) + data[i] = data[i] ? -127 : 127; + + trx_data_ind(as->trx, fn, 0, data, 0.0f); + +exit: + msgb_free(msg); + + return rc; +} + +static int +_l1ctl_rx_bts_burst_ab_ind(struct app_state *as, struct msgb *msg) +{ + struct l1ctl_bts_burst_ab_ind *bi; + uint32_t fn; + int rc; + sbit_t data[148]; + float toa; + + bi = (struct l1ctl_bts_burst_ab_ind *) msg->l1h; + + if (msgb_l1len(msg) < sizeof(*bi)) { + LOGP(DL1C, LOGL_ERROR, "MSG too short Burst AB Ind: %u\n", + msgb_l2len(msg)); + rc = -EINVAL; + goto exit; + } + + fn = ntohl(bi->fn); + + LOGP(DL1C, LOGL_INFO, "Access Burst Indication (fn=%d)\n", fn); + + gsm_ab_ind_process(as, bi, data, &toa); + trx_data_ind(as->trx, fn, 0, data, toa); + +exit: + msgb_free(msg); + + return rc; +} + +static int +_l1ctl_rx_data_ind(struct app_state *as, struct msgb *msg) +{ + struct l1ctl_info_dl *dl; + struct l1ctl_data_ind *di; + int rc; + + dl = (struct l1ctl_info_dl *) msg->l1h; + msg->l2h = dl->payload; + di = (struct l1ctl_data_ind *) msg->l2h; + + if (msgb_l1len(msg) < sizeof(*dl)) { + LOGP(DL1C, LOGL_ERROR, "Short Layer2 message: %u\n", + msgb_l2len(msg)); + rc = -EINVAL; + goto exit; + } + + if (msgb_l2len(msg) < sizeof(*di)) { + LOGP(DL1C, LOGL_ERROR, "MSG too short Data Ind: %u\n", + msgb_l3len(msg)); + rc = -EINVAL; + goto exit; + } + +#if 0 + if (dl->fire_crc > 2) { + LOGP(DAPP, LOGL_INFO, "Invalid BCCH message, retry sync ...\n"); + rc = l1ctl_tx_fbsb_req(&as->l1l, as->arfcn_sync, L1CTL_FBSB_F_FB01SB, 100, 0, CCCH_MODE_NONE); + } else { + LOGP(DAPP, LOGL_INFO, "Valid BCCH message, sync ok -> switch to BTS mode\n"); + + rc = 0; + } +#endif + + rc = trx_clk_ind(as->trx, ntohl(dl->frame_nr)); + +exit: + msgb_free(msg); + + return rc; +} + +static int +_l1ctl_rx_fbsb_conf(struct app_state *as, struct msgb *msg) +{ + struct l1ctl_info_dl *dl; + struct l1ctl_fbsb_conf *sc; + int rc; + + dl = (struct l1ctl_info_dl *) msg->l1h; + msg->l2h = dl->payload; + sc = (struct l1ctl_fbsb_conf *) msg->l2h; + + if (msgb_l1len(msg) < sizeof(*dl)) { + LOGP(DL1C, LOGL_ERROR, "Short Layer2 message: %u\n", + msgb_l2len(msg)); + rc = -EINVAL; + goto exit; + } + + if (msgb_l2len(msg) < sizeof(*sc)) { + LOGP(DL1C, LOGL_ERROR, "MSG too short FBSB Conf: %u\n", + msgb_l3len(msg)); + rc = -EINVAL; + goto exit; + } + + if (sc->result != 0) { + LOGP(DAPP, LOGL_INFO, "Sync failed, retrying ... \n"); + rc = l1ctl_tx_fbsb_req(&as->l1l, as->arfcn_sync, L1CTL_FBSB_F_FB01SB, 100, 0, CCCH_MODE_NONE); + } else { + LOGP(DAPP, LOGL_INFO, "Sync acquired, wait for BCCH ...\n"); + } + + rc = 0; + +exit: + msgb_free(msg); + + return rc; +} + +int +l1ctl_recv(void *data, struct msgb *msg) +{ + struct app_state *as = data; + struct l1ctl_hdr *l1h; + int rc = 0; + + /* move the l1 header pointer to point _BEHIND_ l1ctl_hdr, + as the l1ctl header is of no interest to subsequent code */ + l1h = (struct l1ctl_hdr *) msg->l1h; + msg->l1h = l1h->data; + + /* Act */ + switch (l1h->msg_type) { + case L1CTL_BTS_BURST_AB_IND: + rc = _l1ctl_rx_bts_burst_ab_ind(as, msg); + break; + + case L1CTL_BTS_BURST_NB_IND: + rc = _l1ctl_rx_bts_burst_nb_ind(as, msg); + break; + + case L1CTL_DATA_IND: + rc = _l1ctl_rx_data_ind(as, msg); + break; + + case L1CTL_FBSB_CONF: + rc = _l1ctl_rx_fbsb_conf(as, msg); + break; + + case L1CTL_RESET_IND: + case L1CTL_RESET_CONF: + LOGP(DAPP, LOGL_INFO, "Reset received: Starting sync.\n"); + l1ctl_tx_fbsb_req(&as->l1l, as->arfcn_sync, L1CTL_FBSB_F_FB01SB, 100, 0, CCCH_MODE_NONE); + msgb_free(msg); + break; + + default: + LOGP(DL1C, LOGL_ERROR, "Unknown MSG: %u\n", l1h->msg_type); + msgb_free(msg); + break; + } + + return rc; +} diff --git a/src/host/layer23/src/transceiver/l1ctl.h b/src/host/layer23/src/transceiver/l1ctl.h new file mode 100644 index 00000000..da7769d2 --- /dev/null +++ b/src/host/layer23/src/transceiver/l1ctl.h @@ -0,0 +1,49 @@ +/* + * l1ctl.h + * + * Minimal L1CTL + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __TRX_L1CTL_H__ +#define __TRX_L1CTL_H__ + + +#include <stdint.h> + +#include <l1ctl_proto.h> + +struct burst_data; +struct l1ctl_link; +struct msgb; + + +int l1ctl_tx_reset_req(struct l1ctl_link *l1l, uint8_t type); +int l1ctl_tx_fbsb_req(struct l1ctl_link *l1l, + uint16_t arfcn, uint8_t flags, uint16_t timeout, + uint8_t sync_info_idx, uint8_t ccch_mode); +int l1ctl_tx_bts_mode(struct l1ctl_link *l1l, + uint8_t enabled, uint8_t bsic, uint16_t band_arfcn); +int l1ctl_tx_bts_burst_req(struct l1ctl_link *l1l, + uint32_t fn, uint8_t tn, struct burst_data *burst); + +int l1ctl_recv(void *data, struct msgb *msg); + + +#endif /* __TRX_L1CTL_H__ */ diff --git a/src/host/layer23/src/transceiver/l1ctl_link.c b/src/host/layer23/src/transceiver/l1ctl_link.c new file mode 100644 index 00000000..5ec83e42 --- /dev/null +++ b/src/host/layer23/src/transceiver/l1ctl_link.c @@ -0,0 +1,187 @@ +/* + * l1ctl_link.c + * + * L1CTL link handling + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <errno.h> +#include <string.h> +#include <unistd.h> + +#include <sys/socket.h> +#include <sys/un.h> +#include <arpa/inet.h> + +#include <osmocom/core/write_queue.h> + +#include <osmocom/bb/common/logging.h> + +#include "l1ctl_link.h" + + +#define L1CTL_LENGTH 256 +#define L1CTL_HEADROOM 32 + +static int +_l1l_read(struct osmo_fd *fd) +{ + struct l1ctl_link *l1l = fd->data; + struct msgb *msg; + uint16_t len; + int rc; + + msg = msgb_alloc_headroom(L1CTL_LENGTH+L1CTL_HEADROOM, L1CTL_HEADROOM, "L1CTL"); + if (!msg) { + LOGP(DL1C, LOGL_ERROR, "Failed to allocate msg.\n"); + return -ENOMEM; + } + + rc = read(fd->fd, &len, sizeof(len)); + if (rc < sizeof(len)) { + LOGP(DL1C, LOGL_ERROR, "l1ctl socket failed\n"); + msgb_free(msg); + if (rc >= 0) + rc = -EIO; + l1l_close(l1l); + return rc; + } + + len = ntohs(len); + if (len > L1CTL_LENGTH) { + LOGP(DL1C, LOGL_ERROR, "Length is too big: %u\n", len); + msgb_free(msg); + return -EINVAL; + } + + + msg->l1h = msgb_put(msg, len); + rc = read(fd->fd, msg->l1h, msgb_l1len(msg)); + if (rc != msgb_l1len(msg)) { + LOGP(DL1C, LOGL_ERROR, "Can not read data: len=%d rc=%d " + "errno=%d\n", len, rc, errno); + msgb_free(msg); + return rc; + } + + return l1l->cb(l1l->cb_data, msg); +} + +static int +_l1l_write(struct osmo_fd *fd, struct msgb *msg) +{ + int rc; + + if (fd->fd <= 0) + return -EINVAL; + + rc = write(fd->fd, msg->data, msg->len); + if (rc != msg->len) { + LOGP(DL1C, LOGL_ERROR, "Failed to write data: rc: %d\n", rc); + return rc; + } + + return 0; +} + + +int +l1l_open(struct l1ctl_link *l1l, + const char *path, l1ctl_cb_t cb, void *cb_data) +{ + int rc, fd; + struct sockaddr_un local; + + l1l->cb = cb; + l1l->cb_data = cb_data; + + fd = socket(AF_UNIX, SOCK_STREAM, 0); + if (fd < 0) { + LOGP(DL1C, LOGL_ERROR, "Failed to create unix domain socket.\n"); + return fd; + } + + l1l->wq.bfd.fd = fd; + + local.sun_family = AF_UNIX; + strncpy(local.sun_path, path, sizeof(local.sun_path)); + local.sun_path[sizeof(local.sun_path) - 1] = '\0'; + + rc = connect(fd, (struct sockaddr *) &local, sizeof(local)); + if (rc < 0) { + LOGP(DL1C, LOGL_ERROR, "Failed to connect to '%s': %s\n", + local.sun_path, strerror(errno)); + close(fd); + return rc; + } + + osmo_wqueue_init(&l1l->wq, 100); + l1l->wq.bfd.data = l1l; + l1l->wq.bfd.when = BSC_FD_READ; + l1l->wq.read_cb = _l1l_read; + l1l->wq.write_cb = _l1l_write; + + rc = osmo_fd_register(&l1l->wq.bfd); + if (rc != 0) { + LOGP(DL1C, LOGL_ERROR, "Failed to register fd.\n"); + close(fd); + return rc; + } + + return 0; +} + +int +l1l_close(struct l1ctl_link *l1l) +{ + if (l1l->wq.bfd.fd <= 0) + return -EINVAL; + + osmo_fd_unregister(&l1l->wq.bfd); + + close(l1l->wq.bfd.fd); + l1l->wq.bfd.fd = -1; + + osmo_wqueue_clear(&l1l->wq); + + return 0; +} + +int +l1l_send(struct l1ctl_link *l1l, struct msgb *msg) +{ + uint16_t *len; + + DEBUGP(DL1C, "Sending: '%s'\n", osmo_hexdump(msg->data, msg->len)); + + if (msg->l1h != msg->data) + LOGP(DL1C, LOGL_NOTICE, "Message L1 header != Message Data\n"); + + /* prepend 16bit length before sending */ + len = (uint16_t *) msgb_push(msg, sizeof(*len)); + *len = htons(msg->len - sizeof(*len)); + + if (osmo_wqueue_enqueue(&l1l->wq, msg) != 0) { + LOGP(DL1C, LOGL_ERROR, "Failed to enqueue msg.\n"); + msgb_free(msg); + return -EIO; + } + + return 0; +} diff --git a/src/host/layer23/src/transceiver/l1ctl_link.h b/src/host/layer23/src/transceiver/l1ctl_link.h new file mode 100644 index 00000000..e53bd829 --- /dev/null +++ b/src/host/layer23/src/transceiver/l1ctl_link.h @@ -0,0 +1,50 @@ +/* + * l1ctl_link.h + * + * L1CTL link handling + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __TRX_L1CTL_LINK_H__ +#define __TRX_L1CTL_LINK_H__ + + +#include <osmocom/core/write_queue.h> + + +typedef int (*l1ctl_cb_t)(void *data, struct msgb *msgb); + +struct l1ctl_link +{ + struct osmo_wqueue wq; + + l1ctl_cb_t cb; + void *cb_data; +}; + + +int l1l_open(struct l1ctl_link *l1l, + const char *path, l1ctl_cb_t cb, void *cb_data); + +int l1l_close(struct l1ctl_link *l1l); + +int l1l_send(struct l1ctl_link *l1l, struct msgb *msg); + + +#endif /* __TRX_L1CTL_LINK_H__ */ diff --git a/src/host/layer23/src/transceiver/main.c b/src/host/layer23/src/transceiver/main.c new file mode 100644 index 00000000..3b7281dd --- /dev/null +++ b/src/host/layer23/src/transceiver/main.c @@ -0,0 +1,101 @@ +/* + * main.c + * + * Tranceiver main program + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <stdlib.h> +#include <string.h> + +#include <osmocom/core/select.h> +#include <osmocom/core/talloc.h> + +#include <osmocom/bb/common/logging.h> + +#include "app.h" +#include "l1ctl.h" +#include "l1ctl_link.h" +#include "trx.h" +#include "gmsk.h" +#include "gsm_ab.h" + + +void *l23_ctx = NULL; + + +int main(int argc, char *argv[]) +{ + struct app_state _as, *as = &_as; + int rv; + + /* Options */ + if (argc != 2) { + fprintf(stderr, "Usage: %s arfcn_sync\n", argv[0]); + return -1; + } + + /* App state init */ + memset(as, 0x00, sizeof(struct app_state)); + + as->arfcn_sync = atoi(argv[1]); + printf("%d\n", as->arfcn_sync); + + /* Init talloc */ + l23_ctx = talloc_named_const(NULL, 1, "l23 app context"); + + /* Init logging */ + log_init(&log_info, l23_ctx); + + as->stderr_target = log_target_create_stderr(); + + log_add_target(as->stderr_target); + log_set_all_filter(as->stderr_target, 1); + + /* Init signal processing */ + /* Init GMSK tables */ + as->gs = osmo_gmsk_init(1); + if (!as->gs) + exit(-1); + + /* Init AB corr seq */ + as->train_ab = osmo_gmsk_trainseq_generate(as->gs, gsm_ab_train, GSM_AB_TRAIN_LEN); + if (!as->train_ab) + exit(-1); + + /* TRX interface with OpenBTS */ + as->trx = trx_alloc("127.0.0.1", 5700, &as->l1l); + if (!as->trx) + exit(-1); + + /* Establish l1ctl link */ + rv = l1l_open(&as->l1l, "/tmp/osmocom_l2", l1ctl_recv, as); + if (rv) + exit(-1); + + /* Reset phone */ + l1ctl_tx_reset_req(&as->l1l, L1CTL_RES_T_FULL); + + /* Main loop */ + while (1) { + osmo_select_main(0); + } + + return 0; +} diff --git a/src/host/layer23/src/transceiver/trx.c b/src/host/layer23/src/transceiver/trx.c new file mode 100644 index 00000000..9149b7ca --- /dev/null +++ b/src/host/layer23/src/transceiver/trx.c @@ -0,0 +1,557 @@ +/* + * trx.c + * + * OpenBTS TRX interface handling + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <errno.h> +#include <stdarg.h> +#include <stdint.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#include <sys/types.h> +#include <sys/socket.h> + +#include <netinet/in.h> + +#include <osmocom/core/bits.h> +#include <osmocom/core/select.h> +#include <osmocom/core/socket.h> +#include <osmocom/core/talloc.h> +#include <osmocom/core/utils.h> + +#include <osmocom/gsm/gsm_utils.h> + +#include <osmocom/bb/common/logging.h> + +#include "l1ctl.h" +#include "l1ctl_link.h" +#include "trx.h" +#include "burst.h" + + +static int _trx_clk_read_cb(struct osmo_fd *ofd, unsigned int what); +static int _trx_ctrl_read_cb(struct osmo_fd *ofd, unsigned int what); +static int _trx_data_read_cb(struct osmo_fd *ofd, unsigned int what); + + +/* ------------------------------------------------------------------------ */ +/* Init */ +/* ------------------------------------------------------------------------ */ + +int +_trx_udp_init(struct trx *trx, + struct osmo_fd *ofd, const char *addr, uint16_t port, + int (*cb)(struct osmo_fd *fd, unsigned int what)) +{ + struct sockaddr_storage _sas; + struct sockaddr *sa = (struct sockaddr *)&_sas; + socklen_t sa_len; + int rv; + + /* Init */ + ofd->fd = -1; + ofd->cb = cb; + ofd->data = trx; + + /* Listen / Binds */ + rv = osmo_sock_init_ofd( + ofd, + AF_UNSPEC, SOCK_DGRAM, 0, addr, port, + OSMO_SOCK_F_BIND); + if (rv < 0) + goto err; + + /* Connect */ + sa_len = sizeof(struct sockaddr_storage); + rv = getsockname(ofd->fd, sa, &sa_len); + if (rv) + goto err; + + if (sa->sa_family == AF_INET) { + struct sockaddr_in *sin = (struct sockaddr_in *)sa; + sin->sin_port = htons(ntohs(sin->sin_port) + 100); + } else if (sa->sa_family == AF_INET6) { + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; + sin6->sin6_port = htons(ntohs(sin6->sin6_port) + 100); + } else { + rv = -EINVAL; + goto err; + } + + rv = connect(ofd->fd, sa, sa_len); + if (rv) + goto err; + + return 0; + +err: + if (ofd->fd >= 0) { + osmo_fd_unregister(ofd); + close(ofd->fd); + } + + return rv; +} + +struct trx * +trx_alloc(const char *addr, uint16_t base_port, struct l1ctl_link *l1l) +{ + struct trx *trx; + int rv; + + /* Alloc */ + trx = talloc_zero(NULL, struct trx); + if (!trx) + return NULL; + + /* Init */ + trx->arfcn = ARFCN_INVAL; + trx->bsic = BSIC_INVAL; + + /* L1 link */ + trx->l1l = l1l; + + /* Clock */ + rv = _trx_udp_init(trx, &trx->ofd_clk, addr, base_port, _trx_clk_read_cb); + if (rv) + goto err; + + /* Control */ + rv = _trx_udp_init(trx, &trx->ofd_ctrl, addr, base_port+1, _trx_ctrl_read_cb); + if (rv) + goto err; + + /* Data */ + rv = _trx_udp_init(trx, &trx->ofd_data, addr, base_port+2, _trx_data_read_cb); + if (rv) + goto err; + + return trx; + +err: + + return NULL; +} + +void +trx_free(struct trx *trx) +{ + /* FIXME close and remove ofd */ + + talloc_free(trx); +} + + +/* ------------------------------------------------------------------------ */ +/* Clk interface */ +/* ------------------------------------------------------------------------ */ + +static int +_trx_clk_read_cb(struct osmo_fd *ofd, unsigned int what) +{ + char buf[1500]; + int l; + + l = recv(ofd->fd, buf, sizeof(buf), 0); + if (l <= 0) + return l; + + LOGP(DTRX, LOGL_ERROR, "[!] Unexpected data on the CLK interface, discarding\n"); + + return l; +} + +int +trx_clk_ind(struct trx *trx, uint32_t fn) +{ + char buf[64]; + + LOGP(DTRX, LOGL_DEBUG, "TRX CLK Indication %d\n", fn); + + snprintf(buf, sizeof(buf), "IND CLOCK %d", fn + 2); /* FIXME Dynamic adjust ? */ + send(trx->ofd_clk.fd, buf, strlen(buf)+1, 0); + + return 0; +} + + +/* ------------------------------------------------------------------------ */ +/* Control interface */ +/* ------------------------------------------------------------------------ */ + +#define TRX_CMD_BUF_LEN 128 + +static int +_trx_ctrl_send_resp(struct trx *trx, const char *cmd, const char *fmt, ...) +{ + va_list ap; + char buf[TRX_CMD_BUF_LEN]; + int l; + + l = snprintf(buf, sizeof(buf)-1, "RSP %s ", cmd); + + va_start(ap, fmt); + l += vsnprintf(buf+l, sizeof(buf)-l-1, fmt, ap); + va_end(ap); + + buf[l] = '\0'; + + LOGP(DTRX, LOGL_DEBUG, "TRX Control send: |%s|\n", buf); + + send(trx->ofd_ctrl.fd, buf, strlen(buf)+1, 0); + + return 0; +} + +static int +_trx_ctrl_cmd_poweroff(struct trx *trx, const char *cmd, const char *args) +{ + l1ctl_tx_bts_mode(trx->l1l, 0, 0, 0); + + return _trx_ctrl_send_resp(trx, cmd, "%d", 0); +} + +static int +_trx_ctrl_cmd_poweron(struct trx *trx, const char *cmd, const char *args) +{ + int rv; + + if (trx->bsic == BSIC_INVAL || trx->arfcn == ARFCN_INVAL) { + LOGP(DTRX, LOGL_ERROR, + "TRX received POWERON when not fully configured\n"); + rv = -EINVAL; + } else { + rv = l1ctl_tx_bts_mode(trx->l1l, 1, trx->bsic, trx->arfcn); + } + + return _trx_ctrl_send_resp(trx, cmd, "%d", rv); +} + +static int +_trx_ctrl_cmd_settsc(struct trx *trx, const char *cmd, const char *args) +{ + LOGP(DTRX, LOGL_ERROR, + "TRX received SETTSC command ! " + "OpenBTS should be configured to send SETBSIC command !\n"); + + return _trx_ctrl_send_resp(trx, cmd, "%d", -1); +} + +static int +_trx_ctrl_cmd_setbsic(struct trx *trx, const char *cmd, const char *args) +{ + int bsic = atoi(args); + + if (bsic >= 64) { + LOGP(DTRX, LOGL_ERROR, "Invalid BSIC received\n"); + return _trx_ctrl_send_resp(trx, cmd, "%d", -1); + } + + trx->bsic = bsic; + + return _trx_ctrl_send_resp(trx, cmd, "%d", 0); +} + +static int +_trx_ctrl_cmd_setrxgain(struct trx *trx, const char *cmd, const char *args) +{ + int db = atoi(args); + + return _trx_ctrl_send_resp(trx, cmd, "%d %d", 0, db); +} + +static int +_trx_ctrl_cmd_setpower(struct trx *trx, const char *cmd, const char *args) +{ + int db = atoi(args); + + return _trx_ctrl_send_resp(trx, cmd, "%d %d", 0, db); +} + +static int +_trx_ctrl_cmd_setmaxdly(struct trx *trx, const char *cmd, const char *args) +{ + int dly = atoi(args); + + return _trx_ctrl_send_resp(trx, cmd, "%d %d", 0, dly); +} + +static int +_trx_ctrl_cmd_setslot(struct trx *trx, const char *cmd, const char *args) +{ + int n, tn, type; + + n = sscanf(args, "%d %d", &tn, &type); + + if ((n != 2) || (tn < 0) || (tn > 7) || (type < 0) || (type > 8)) + return _trx_ctrl_send_resp(trx, cmd, "%d %d %d", -1, tn, type); + + return _trx_ctrl_send_resp(trx, cmd, "%d %d", 0, type); +} + +static int +_trx_ctrl_cmd_rxtune(struct trx *trx, const char *cmd, const char *args) +{ + int freq_khz = atoi(args); + uint16_t arfcn; + int rv = 0; + + arfcn = gsm_freq102arfcn(freq_khz / 100, 1); + arfcn &= ~ARFCN_UPLINK; + + if ( arfcn == ARFCN_INVAL || + (trx->arfcn != ARFCN_INVAL && trx->arfcn != arfcn)) { + LOGP(DTRX, LOGL_ERROR, "RXTUNE called with invalid/inconsistent frequency\n"); + goto done; + } + + if (trx->arfcn == ARFCN_INVAL) { + LOGP(DTRX, LOGL_NOTICE, "Setting C0 ARFCN to %d (%s)\n", + arfcn & ~ARFCN_FLAG_MASK, gsm_band_name(gsm_arfcn2band(arfcn))); + trx->arfcn = arfcn; + } + +done: + return _trx_ctrl_send_resp(trx, cmd, "%d %d", rv, freq_khz); +} + +static int +_trx_ctrl_cmd_txtune(struct trx *trx, const char *cmd, const char *args) +{ + int freq_khz = atoi(args); + uint16_t arfcn; + int rv = 0; + + arfcn = gsm_freq102arfcn(freq_khz / 100, 0); + + if ( arfcn == ARFCN_INVAL || + (trx->arfcn != ARFCN_INVAL && trx->arfcn != arfcn)) { + LOGP(DTRX, LOGL_ERROR, "TXTUNE called with invalid/inconsistent frequency\n"); + goto done; + } + + if (trx->arfcn == ARFCN_INVAL) { + LOGP(DTRX, LOGL_NOTICE, "Setting C0 ARFCN to %d (%s)\n", + arfcn & ~ARFCN_FLAG_MASK, gsm_band_name(gsm_arfcn2band(arfcn))); + trx->arfcn = arfcn; + } + +done: + return _trx_ctrl_send_resp(trx, cmd, "%d %d", rv, freq_khz); +} + +struct trx_cmd_handler { + const char *cmd; + int (*handler)(struct trx *trx, const char *cmd, const char *args); +}; + +static const struct trx_cmd_handler trx_handlers[] = { + { "POWEROFF", _trx_ctrl_cmd_poweroff }, + { "POWERON", _trx_ctrl_cmd_poweron }, + { "SETTSC", _trx_ctrl_cmd_settsc }, + { "SETBSIC", _trx_ctrl_cmd_setbsic }, + { "SETPOWER", _trx_ctrl_cmd_setpower }, + { "SETRXGAIN", _trx_ctrl_cmd_setrxgain }, + { "SETMAXDLY", _trx_ctrl_cmd_setmaxdly }, + { "SETSLOT", _trx_ctrl_cmd_setslot }, + { "RXTUNE", _trx_ctrl_cmd_rxtune }, + { "TXTUNE", _trx_ctrl_cmd_txtune }, + { NULL, NULL } +}; + +static int +_trx_ctrl_read_cb(struct osmo_fd *ofd, unsigned int what) +{ + struct trx *trx = ofd->data; + const struct trx_cmd_handler *ch; + char buf[TRX_CMD_BUF_LEN]; + char *cmd, *args; + ssize_t l; + int rv; + + /* Get message */ + l = recv(ofd->fd, buf, sizeof(buf)-1, 0); + if (l <= 0) { + /* FIXME handle exception ... */ + return l; + } + + /* Check 'CMD ' */ + if (strncmp(buf, "CMD ", 4)) + goto inval; + + /* Check length */ + buf[l] = '\0'; /* Safety */ + + if (strlen(buf) != (l-1)) + goto inval; + + /* Split command name and arguments */ + cmd = &buf[4]; + + args = strchr(cmd, ' '); + if (!args) + args = &buf[l]; + else + *args++ = '\0'; + + LOGP(DTRX, LOGL_DEBUG, "TRX Control recv: |%s|%s|\n", cmd, args); + + /* Find handler */ + for (ch=trx_handlers; ch->cmd; ch++) { + if (!strcmp(ch->cmd, cmd)) { + rv = ch->handler(trx, cmd, args); + if (rv) + LOGP(DTRX, LOGL_ERROR, "[!] Processing failure for command '%s'\n", cmd); + break; + } + } + + if (!ch->cmd) { + LOGP(DTRX, LOGL_ERROR, "[!] No handlers found for command '%s'. Empty response\n", cmd); + _trx_ctrl_send_resp(trx, cmd, "%d", -1); + } + + /* Done ! */ + return l; + +inval: + LOGP(DTRX, LOGL_ERROR, "[!] Invalid command '%s' on CTRL interface, discarding\n", buf); + return l; +} + + +/* ------------------------------------------------------------------------ */ +/* Data interface */ +/* ------------------------------------------------------------------------ */ + +#define TRX_DATA_BUF_LEN 256 + +static const ubit_t dummy_burst[] = { + 0,0,0, + 1,1,1,1,1,0,1,1,0,1,1,1,0,1,1,0,0,0,0,0,1,0,1,0,0,1,0,0,1,1,1,0, + 0,0,0,0,1,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,1,1,1,0,0, + 0,1,0,1,1,1,0,0,0,1,0,1,1,1,0,0,0,1,0,1,0,1,1,1,0,1,0,0,1,0,1,0, + 0,0,1,1,0,0,1,1,0,0,1,1,1,0,0,1,1,1,1,0,1,0,0,1,1,1,1,1,0,0,0,1, + 0,0,1,0,1,1,1,1,1,0,1,0,1,0, + 0,0,0, +}; + +static int +_trx_data_read_cb(struct osmo_fd *ofd, unsigned int what) +{ + struct trx *trx = ofd->data; + uint8_t buf[TRX_DATA_BUF_LEN]; + uint32_t fn; + int l, tn, pwr_att; + ubit_t *data; + struct burst_data _burst, *burst = &_burst; + + /* Get message */ + l = recv(ofd->fd, buf, sizeof(buf)-1, 0); + if (l <= 0) { + /* FIXME handle exception ... */ + return l; + } + + /* Validate */ + if (l != 1+4+1+148) + goto inval; + + /* Parse */ + tn = buf[0]; + fn = (buf[1] << 24) | (buf[2] << 16) | (buf[3] << 8) | buf[4]; + pwr_att = buf[5]; + data = buf+6; + + /* Ignore FCCH and SCH completely, they're handled internally */ + if (((fn % 51) % 10) < 2) + goto skip; + + /* Detect dummy bursts */ + if (!memcmp(data, dummy_burst, sizeof(dummy_burst))) { + LOGP(DTRX, LOGL_DEBUG, "TRX Data %u:%d:%d:DUMMY\n", + fn, tn, pwr_att); + goto skip; + } + + /* Pack */ + burst->type = BURST_NB; + burst->data[14] = 0x00; + osmo_ubit2pbit_ext(burst->data, 0, data, 3, 58, 0); + osmo_ubit2pbit_ext(burst->data, 58, data, 87, 58, 0); + + /* Send to L1 */ + if (tn == 0) + l1ctl_tx_bts_burst_req(trx->l1l, fn, tn, burst); + + /* Debug */ + if (tn == 0) + LOGP(DTRX, LOGL_DEBUG, "TRX Data %u:%d:%d:%s\n", + fn, tn, pwr_att, osmo_hexdump_nospc(burst->data, 15)); + + /* Done ! */ +skip: + return l; + +inval: + LOGP(DTRX, LOGL_ERROR, "[!] Invalid data burst on DATA interface, discarding\n"); + return l; +} + +int +trx_data_ind(struct trx *trx, uint32_t fn, uint8_t tn, sbit_t *data, float toa) +{ + char buf[158]; + short toa_int = (short)(toa * 256.0f); + int i; + + LOGP(DTRX, LOGL_DEBUG, "TRX Data Indication (fn=%d, tn=%d, toa=%.2f)\n", fn, tn, toa); + + buf[0] = tn; + + buf[1] = (fn >> 24) & 0xff; + buf[2] = (fn >> 16) & 0xff; + buf[3] = (fn >> 8) & 0xff; + buf[4] = (fn >> 0) & 0xff; + + /* RSSI */ + buf[5] = 0x80; + + /* TOA */ + buf[6] = (toa_int >> 8) & 0xff; + buf[7] = (toa_int >> 0) & 0xff; + + /* Data bits */ + for (i=0; i<148; i++) + buf[8+i] = (unsigned char)(127 - ((int)data[i])); + + /* End char ? */ + buf[9+148] = 0x00; + + /* Send result */ + send(trx->ofd_data.fd, buf, 158, 0); + + return 0; +} diff --git a/src/host/layer23/src/transceiver/trx.h b/src/host/layer23/src/transceiver/trx.h new file mode 100644 index 00000000..0571cab2 --- /dev/null +++ b/src/host/layer23/src/transceiver/trx.h @@ -0,0 +1,64 @@ +/* + * trx.h + * + * OpenBTS TRX interface handling + * + * Copyright (C) 2013 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __TRX_TRX_H__ +#define __TRX_TRX_H__ + + +#include <stdint.h> + +#include <osmocom/core/bits.h> +#include <osmocom/core/select.h> +#include <osmocom/core/timer.h> + + +#define ARFCN_INVAL 0xffff +#define BSIC_INVAL 0xff + +struct l1ctl_link; + + +struct trx { + /* UDP sockets */ + struct osmo_fd ofd_clk; + struct osmo_fd ofd_ctrl; + struct osmo_fd ofd_data; + + /* Link to L1CTL */ + struct l1ctl_link *l1l; + + /* TRX configuration */ + uint16_t arfcn; + uint8_t bsic; +}; + + +struct trx *trx_alloc(const char *addr, uint16_t base_port, + struct l1ctl_link *l1l); +void trx_free(struct trx *trx); + +int trx_clk_ind(struct trx *trx, uint32_t fn); +int trx_data_ind(struct trx *trx, uint32_t fn, uint8_t tn, sbit_t *data, float toa); + + +#endif /* __TRX_TRX_H__ */ |