├── .gitignore ├── LICENSE ├── Makefile ├── README.md ├── etc └── echobot.service ├── flake.lock ├── flake.nix └── src └── echobot.c /.gitignore: -------------------------------------------------------------------------------- 1 | bin/ 2 | data 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. We, the Free Software Foundation, use the 18 | GNU General Public License for most of our software; it applies also to 19 | any other work released this way by its authors. You can apply it to 20 | your programs, too. 21 | 22 | When we speak of free software, we are referring to freedom, not 23 | price. Our General Public Licenses are designed to make sure that you 24 | have the freedom to distribute copies of free software (and charge for 25 | them if you wish), that you receive source code or can get it if you 26 | want it, that you can change the software or use pieces of it in new 27 | free programs, and that you know you can do these things. 28 | 29 | To protect your rights, we need to prevent others from denying you 30 | these rights or asking you to surrender the rights. Therefore, you have 31 | certain responsibilities if you distribute copies of the software, or if 32 | you modify it: responsibilities to respect the freedom of others. 33 | 34 | For example, if you distribute copies of such a program, whether 35 | gratis or for a fee, you must pass on to the recipients the same 36 | freedoms that you received. You must make sure that they, too, receive 37 | or can get the source code. And you must show them these terms so they 38 | know their rights. 39 | 40 | Developers that use the GNU GPL protect your rights with two steps: 41 | (1) assert copyright on the software, and (2) offer you this License 42 | giving you legal permission to copy, distribute and/or modify it. 43 | 44 | For the developers' and authors' protection, the GPL clearly explains 45 | that there is no warranty for this free software. For both users' and 46 | authors' sake, the GPL requires that modified versions be marked as 47 | changed, so that their problems will not be attributed erroneously to 48 | authors of previous versions. 49 | 50 | Some devices are designed to deny users access to install or run 51 | modified versions of the software inside them, although the manufacturer 52 | can do so. This is fundamentally incompatible with the aim of 53 | protecting users' freedom to change the software. The systematic 54 | pattern of such abuse occurs in the area of products for individuals to 55 | use, which is precisely where it is most unacceptable. Therefore, we 56 | have designed this version of the GPL to prohibit the practice for those 57 | products. If such problems arise substantially in other domains, we 58 | stand ready to extend this provision to those domains in future versions 59 | of the GPL, as needed to protect the freedom of users. 60 | 61 | Finally, every program is threatened constantly by software patents. 62 | States should not allow patents to restrict development and use of 63 | software on general-purpose computers, but in those that do, we wish to 64 | avoid the special danger that patents applied to a free program could 65 | make it effectively proprietary. To prevent this, the GPL assures that 66 | patents cannot be used to render the program non-free. 67 | 68 | The precise terms and conditions for copying, distribution and 69 | modification follow. 70 | 71 | TERMS AND CONDITIONS 72 | 73 | 0. Definitions. 74 | 75 | "This License" refers to version 3 of the GNU General Public License. 76 | 77 | "Copyright" also means copyright-like laws that apply to other kinds of 78 | works, such as semiconductor masks. 79 | 80 | "The Program" refers to any copyrightable work licensed under this 81 | License. Each licensee is addressed as "you". "Licensees" and 82 | "recipients" may be individuals or organizations. 83 | 84 | To "modify" a work means to copy from or adapt all or part of the work 85 | in a fashion requiring copyright permission, other than the making of an 86 | exact copy. The resulting work is called a "modified version" of the 87 | earlier work or a work "based on" the earlier work. 88 | 89 | A "covered work" means either the unmodified Program or a work based 90 | on the Program. 91 | 92 | To "propagate" a work means to do anything with it that, without 93 | permission, would make you directly or secondarily liable for 94 | infringement under applicable copyright law, except executing it on a 95 | computer or modifying a private copy. Propagation includes copying, 96 | distribution (with or without modification), making available to the 97 | public, and in some countries other activities as well. 98 | 99 | To "convey" a work means any kind of propagation that enables other 100 | parties to make or receive copies. Mere interaction with a user through 101 | a computer network, with no transfer of a copy, is not conveying. 102 | 103 | An interactive user interface displays "Appropriate Legal Notices" 104 | to the extent that it includes a convenient and prominently visible 105 | feature that (1) displays an appropriate copyright notice, and (2) 106 | tells the user that there is no warranty for the work (except to the 107 | extent that warranties are provided), that licensees may convey the 108 | work under this License, and how to view a copy of this License. If 109 | the interface presents a list of user commands or options, such as a 110 | menu, a prominent item in the list meets this criterion. 111 | 112 | 1. Source Code. 113 | 114 | The "source code" for a work means the preferred form of the work 115 | for making modifications to it. "Object code" means any non-source 116 | form of a work. 117 | 118 | A "Standard Interface" means an interface that either is an official 119 | standard defined by a recognized standards body, or, in the case of 120 | interfaces specified for a particular programming language, one that 121 | is widely used among developers working in that language. 122 | 123 | The "System Libraries" of an executable work include anything, other 124 | than the work as a whole, that (a) is included in the normal form of 125 | packaging a Major Component, but which is not part of that Major 126 | Component, and (b) serves only to enable use of the work with that 127 | Major Component, or to implement a Standard Interface for which an 128 | implementation is available to the public in source code form. A 129 | "Major Component", in this context, means a major essential component 130 | (kernel, window system, and so on) of the specific operating system 131 | (if any) on which the executable work runs, or a compiler used to 132 | produce the work, or an object code interpreter used to run it. 133 | 134 | The "Corresponding Source" for a work in object code form means all 135 | the source code needed to generate, install, and (for an executable 136 | work) run the object code and to modify the work, including scripts to 137 | control those activities. However, it does not include the work's 138 | System Libraries, or general-purpose tools or generally available free 139 | programs which are used unmodified in performing those activities but 140 | which are not part of the work. For example, Corresponding Source 141 | includes interface definition files associated with source files for 142 | the work, and the source code for shared libraries and dynamically 143 | linked subprograms that the work is specifically designed to require, 144 | such as by intimate data communication or control flow between those 145 | subprograms and other parts of the work. 146 | 147 | The Corresponding Source need not include anything that users 148 | can regenerate automatically from other parts of the Corresponding 149 | Source. 150 | 151 | The Corresponding Source for a work in source code form is that 152 | same work. 153 | 154 | 2. Basic Permissions. 155 | 156 | All rights granted under this License are granted for the term of 157 | copyright on the Program, and are irrevocable provided the stated 158 | conditions are met. This License explicitly affirms your unlimited 159 | permission to run the unmodified Program. The output from running a 160 | covered work is covered by this License only if the output, given its 161 | content, constitutes a covered work. This License acknowledges your 162 | rights of fair use or other equivalent, as provided by copyright law. 163 | 164 | You may make, run and propagate covered works that you do not 165 | convey, without conditions so long as your license otherwise remains 166 | in force. You may convey covered works to others for the sole purpose 167 | of having them make modifications exclusively for you, or provide you 168 | with facilities for running those works, provided that you comply with 169 | the terms of this License in conveying all material for which you do 170 | not control copyright. Those thus making or running the covered works 171 | for you must do so exclusively on your behalf, under your direction 172 | and control, on terms that prohibit them from making any copies of 173 | your copyrighted material outside their relationship with you. 174 | 175 | Conveying under any other circumstances is permitted solely under 176 | the conditions stated below. Sublicensing is not allowed; section 10 177 | makes it unnecessary. 178 | 179 | 3. Protecting Users' Legal Rights From Anti-Circumvention Law. 180 | 181 | No covered work shall be deemed part of an effective technological 182 | measure under any applicable law fulfilling obligations under article 183 | 11 of the WIPO copyright treaty adopted on 20 December 1996, or 184 | similar laws prohibiting or restricting circumvention of such 185 | measures. 186 | 187 | When you convey a covered work, you waive any legal power to forbid 188 | circumvention of technological measures to the extent such circumvention 189 | is effected by exercising rights under this License with respect to 190 | the covered work, and you disclaim any intention to limit operation or 191 | modification of the work as a means of enforcing, against the work's 192 | users, your or third parties' legal rights to forbid circumvention of 193 | technological measures. 194 | 195 | 4. Conveying Verbatim Copies. 196 | 197 | You may convey verbatim copies of the Program's source code as you 198 | receive it, in any medium, provided that you conspicuously and 199 | appropriately publish on each copy an appropriate copyright notice; 200 | keep intact all notices stating that this License and any 201 | non-permissive terms added in accord with section 7 apply to the code; 202 | keep intact all notices of the absence of any warranty; and give all 203 | recipients a copy of this License along with the Program. 204 | 205 | You may charge any price or no price for each copy that you convey, 206 | and you may offer support or warranty protection for a fee. 207 | 208 | 5. Conveying Modified Source Versions. 209 | 210 | You may convey a work based on the Program, or the modifications to 211 | produce it from the Program, in the form of source code under the 212 | terms of section 4, provided that you also meet all of these conditions: 213 | 214 | a) The work must carry prominent notices stating that you modified 215 | it, and giving a relevant date. 216 | 217 | b) The work must carry prominent notices stating that it is 218 | released under this License and any conditions added under section 219 | 7. This requirement modifies the requirement in section 4 to 220 | "keep intact all notices". 221 | 222 | c) You must license the entire work, as a whole, under this 223 | License to anyone who comes into possession of a copy. This 224 | License will therefore apply, along with any applicable section 7 225 | additional terms, to the whole of the work, and all its parts, 226 | regardless of how they are packaged. This License gives no 227 | permission to license the work in any other way, but it does not 228 | invalidate such permission if you have separately received it. 229 | 230 | d) If the work has interactive user interfaces, each must display 231 | Appropriate Legal Notices; however, if the Program has interactive 232 | interfaces that do not display Appropriate Legal Notices, your 233 | work need not make them do so. 234 | 235 | A compilation of a covered work with other separate and independent 236 | works, which are not by their nature extensions of the covered work, 237 | and which are not combined with it such as to form a larger program, 238 | in or on a volume of a storage or distribution medium, is called an 239 | "aggregate" if the compilation and its resulting copyright are not 240 | used to limit the access or legal rights of the compilation's users 241 | beyond what the individual works permit. Inclusion of a covered work 242 | in an aggregate does not cause this License to apply to the other 243 | parts of the aggregate. 244 | 245 | 6. Conveying Non-Source Forms. 246 | 247 | You may convey a covered work in object code form under the terms 248 | of sections 4 and 5, provided that you also convey the 249 | machine-readable Corresponding Source under the terms of this License, 250 | in one of these ways: 251 | 252 | a) Convey the object code in, or embodied in, a physical product 253 | (including a physical distribution medium), accompanied by the 254 | Corresponding Source fixed on a durable physical medium 255 | customarily used for software interchange. 256 | 257 | b) Convey the object code in, or embodied in, a physical product 258 | (including a physical distribution medium), accompanied by a 259 | written offer, valid for at least three years and valid for as 260 | long as you offer spare parts or customer support for that product 261 | model, to give anyone who possesses the object code either (1) a 262 | copy of the Corresponding Source for all the software in the 263 | product that is covered by this License, on a durable physical 264 | medium customarily used for software interchange, for a price no 265 | more than your reasonable cost of physically performing this 266 | conveying of source, or (2) access to copy the 267 | Corresponding Source from a network server at no charge. 268 | 269 | c) Convey individual copies of the object code with a copy of the 270 | written offer to provide the Corresponding Source. This 271 | alternative is allowed only occasionally and noncommercially, and 272 | only if you received the object code with such an offer, in accord 273 | with subsection 6b. 274 | 275 | d) Convey the object code by offering access from a designated 276 | place (gratis or for a charge), and offer equivalent access to the 277 | Corresponding Source in the same way through the same place at no 278 | further charge. You need not require recipients to copy the 279 | Corresponding Source along with the object code. If the place to 280 | copy the object code is a network server, the Corresponding Source 281 | may be on a different server (operated by you or a third party) 282 | that supports equivalent copying facilities, provided you maintain 283 | clear directions next to the object code saying where to find the 284 | Corresponding Source. Regardless of what server hosts the 285 | Corresponding Source, you remain obligated to ensure that it is 286 | available for as long as needed to satisfy these requirements. 287 | 288 | e) Convey the object code using peer-to-peer transmission, provided 289 | you inform other peers where the object code and Corresponding 290 | Source of the work are being offered to the general public at no 291 | charge under subsection 6d. 292 | 293 | A separable portion of the object code, whose source code is excluded 294 | from the Corresponding Source as a System Library, need not be 295 | included in conveying the object code work. 296 | 297 | A "User Product" is either (1) a "consumer product", which means any 298 | tangible personal property which is normally used for personal, family, 299 | or household purposes, or (2) anything designed or sold for incorporation 300 | into a dwelling. In determining whether a product is a consumer product, 301 | doubtful cases shall be resolved in favor of coverage. For a particular 302 | product received by a particular user, "normally used" refers to a 303 | typical or common use of that class of product, regardless of the status 304 | of the particular user or of the way in which the particular user 305 | actually uses, or expects or is expected to use, the product. A product 306 | is a consumer product regardless of whether the product has substantial 307 | commercial, industrial or non-consumer uses, unless such uses represent 308 | the only significant mode of use of the product. 309 | 310 | "Installation Information" for a User Product means any methods, 311 | procedures, authorization keys, or other information required to install 312 | and execute modified versions of a covered work in that User Product from 313 | a modified version of its Corresponding Source. The information must 314 | suffice to ensure that the continued functioning of the modified object 315 | code is in no case prevented or interfered with solely because 316 | modification has been made. 317 | 318 | If you convey an object code work under this section in, or with, or 319 | specifically for use in, a User Product, and the conveying occurs as 320 | part of a transaction in which the right of possession and use of the 321 | User Product is transferred to the recipient in perpetuity or for a 322 | fixed term (regardless of how the transaction is characterized), the 323 | Corresponding Source conveyed under this section must be accompanied 324 | by the Installation Information. But this requirement does not apply 325 | if neither you nor any third party retains the ability to install 326 | modified object code on the User Product (for example, the work has 327 | been installed in ROM). 328 | 329 | The requirement to provide Installation Information does not include a 330 | requirement to continue to provide support service, warranty, or updates 331 | for a work that has been modified or installed by the recipient, or for 332 | the User Product in which it has been modified or installed. Access to a 333 | network may be denied when the modification itself materially and 334 | adversely affects the operation of the network or violates the rules and 335 | protocols for communication across the network. 336 | 337 | Corresponding Source conveyed, and Installation Information provided, 338 | in accord with this section must be in a format that is publicly 339 | documented (and with an implementation available to the public in 340 | source code form), and must require no special password or key for 341 | unpacking, reading or copying. 342 | 343 | 7. Additional Terms. 344 | 345 | "Additional permissions" are terms that supplement the terms of this 346 | License by making exceptions from one or more of its conditions. 347 | Additional permissions that are applicable to the entire Program shall 348 | be treated as though they were included in this License, to the extent 349 | that they are valid under applicable law. If additional permissions 350 | apply only to part of the Program, that part may be used separately 351 | under those permissions, but the entire Program remains governed by 352 | this License without regard to the additional permissions. 353 | 354 | When you convey a copy of a covered work, you may at your option 355 | remove any additional permissions from that copy, or from any part of 356 | it. (Additional permissions may be written to require their own 357 | removal in certain cases when you modify the work.) You may place 358 | additional permissions on material, added by you to a covered work, 359 | for which you have or can give appropriate copyright permission. 360 | 361 | Notwithstanding any other provision of this License, for material you 362 | add to a covered work, you may (if authorized by the copyright holders of 363 | that material) supplement the terms of this License with terms: 364 | 365 | a) Disclaiming warranty or limiting liability differently from the 366 | terms of sections 15 and 16 of this License; or 367 | 368 | b) Requiring preservation of specified reasonable legal notices or 369 | author attributions in that material or in the Appropriate Legal 370 | Notices displayed by works containing it; or 371 | 372 | c) Prohibiting misrepresentation of the origin of that material, or 373 | requiring that modified versions of such material be marked in 374 | reasonable ways as different from the original version; or 375 | 376 | d) Limiting the use for publicity purposes of names of licensors or 377 | authors of the material; or 378 | 379 | e) Declining to grant rights under trademark law for use of some 380 | trade names, trademarks, or service marks; or 381 | 382 | f) Requiring indemnification of licensors and authors of that 383 | material by anyone who conveys the material (or modified versions of 384 | it) with contractual assumptions of liability to the recipient, for 385 | any liability that these contractual assumptions directly impose on 386 | those licensors and authors. 387 | 388 | All other non-permissive additional terms are considered "further 389 | restrictions" within the meaning of section 10. If the Program as you 390 | received it, or any part of it, contains a notice stating that it is 391 | governed by this License along with a term that is a further 392 | restriction, you may remove that term. If a license document contains 393 | a further restriction but permits relicensing or conveying under this 394 | License, you may add to a covered work material governed by the terms 395 | of that license document, provided that the further restriction does 396 | not survive such relicensing or conveying. 397 | 398 | If you add terms to a covered work in accord with this section, you 399 | must place, in the relevant source files, a statement of the 400 | additional terms that apply to those files, or a notice indicating 401 | where to find the applicable terms. 402 | 403 | Additional terms, permissive or non-permissive, may be stated in the 404 | form of a separately written license, or stated as exceptions; 405 | the above requirements apply either way. 406 | 407 | 8. Termination. 408 | 409 | You may not propagate or modify a covered work except as expressly 410 | provided under this License. Any attempt otherwise to propagate or 411 | modify it is void, and will automatically terminate your rights under 412 | this License (including any patent licenses granted under the third 413 | paragraph of section 11). 414 | 415 | However, if you cease all violation of this License, then your 416 | license from a particular copyright holder is reinstated (a) 417 | provisionally, unless and until the copyright holder explicitly and 418 | finally terminates your license, and (b) permanently, if the copyright 419 | holder fails to notify you of the violation by some reasonable means 420 | prior to 60 days after the cessation. 421 | 422 | Moreover, your license from a particular copyright holder is 423 | reinstated permanently if the copyright holder notifies you of the 424 | violation by some reasonable means, this is the first time you have 425 | received notice of violation of this License (for any work) from that 426 | copyright holder, and you cure the violation prior to 30 days after 427 | your receipt of the notice. 428 | 429 | Termination of your rights under this section does not terminate the 430 | licenses of parties who have received copies or rights from you under 431 | this License. If your rights have been terminated and not permanently 432 | reinstated, you do not qualify to receive new licenses for the same 433 | material under section 10. 434 | 435 | 9. Acceptance Not Required for Having Copies. 436 | 437 | You are not required to accept this License in order to receive or 438 | run a copy of the Program. Ancillary propagation of a covered work 439 | occurring solely as a consequence of using peer-to-peer transmission 440 | to receive a copy likewise does not require acceptance. However, 441 | nothing other than this License grants you permission to propagate or 442 | modify any covered work. These actions infringe copyright if you do 443 | not accept this License. Therefore, by modifying or propagating a 444 | covered work, you indicate your acceptance of this License to do so. 445 | 446 | 10. Automatic Licensing of Downstream Recipients. 447 | 448 | Each time you convey a covered work, the recipient automatically 449 | receives a license from the original licensors, to run, modify and 450 | propagate that work, subject to this License. You are not responsible 451 | for enforcing compliance by third parties with this License. 452 | 453 | An "entity transaction" is a transaction transferring control of an 454 | organization, or substantially all assets of one, or subdividing an 455 | organization, or merging organizations. If propagation of a covered 456 | work results from an entity transaction, each party to that 457 | transaction who receives a copy of the work also receives whatever 458 | licenses to the work the party's predecessor in interest had or could 459 | give under the previous paragraph, plus a right to possession of the 460 | Corresponding Source of the work from the predecessor in interest, if 461 | the predecessor has it or can get it with reasonable efforts. 462 | 463 | You may not impose any further restrictions on the exercise of the 464 | rights granted or affirmed under this License. For example, you may 465 | not impose a license fee, royalty, or other charge for exercise of 466 | rights granted under this License, and you may not initiate litigation 467 | (including a cross-claim or counterclaim in a lawsuit) alleging that 468 | any patent claim is infringed by making, using, selling, offering for 469 | sale, or importing the Program or any portion of it. 470 | 471 | 11. Patents. 472 | 473 | A "contributor" is a copyright holder who authorizes use under this 474 | License of the Program or a work on which the Program is based. The 475 | work thus licensed is called the contributor's "contributor version". 476 | 477 | A contributor's "essential patent claims" are all patent claims 478 | owned or controlled by the contributor, whether already acquired or 479 | hereafter acquired, that would be infringed by some manner, permitted 480 | by this License, of making, using, or selling its contributor version, 481 | but do not include claims that would be infringed only as a 482 | consequence of further modification of the contributor version. For 483 | purposes of this definition, "control" includes the right to grant 484 | patent sublicenses in a manner consistent with the requirements of 485 | this License. 486 | 487 | Each contributor grants you a non-exclusive, worldwide, royalty-free 488 | patent license under the contributor's essential patent claims, to 489 | make, use, sell, offer for sale, import and otherwise run, modify and 490 | propagate the contents of its contributor version. 491 | 492 | In the following three paragraphs, a "patent license" is any express 493 | agreement or commitment, however denominated, not to enforce a patent 494 | (such as an express permission to practice a patent or covenant not to 495 | sue for patent infringement). To "grant" such a patent license to a 496 | party means to make such an agreement or commitment not to enforce a 497 | patent against the party. 498 | 499 | If you convey a covered work, knowingly relying on a patent license, 500 | and the Corresponding Source of the work is not available for anyone 501 | to copy, free of charge and under the terms of this License, through a 502 | publicly available network server or other readily accessible means, 503 | then you must either (1) cause the Corresponding Source to be so 504 | available, or (2) arrange to deprive yourself of the benefit of the 505 | patent license for this particular work, or (3) arrange, in a manner 506 | consistent with the requirements of this License, to extend the patent 507 | license to downstream recipients. "Knowingly relying" means you have 508 | actual knowledge that, but for the patent license, your conveying the 509 | covered work in a country, or your recipient's use of the covered work 510 | in a country, would infringe one or more identifiable patents in that 511 | country that you have reason to believe are valid. 512 | 513 | If, pursuant to or in connection with a single transaction or 514 | arrangement, you convey, or propagate by procuring conveyance of, a 515 | covered work, and grant a patent license to some of the parties 516 | receiving the covered work authorizing them to use, propagate, modify 517 | or convey a specific copy of the covered work, then the patent license 518 | you grant is automatically extended to all recipients of the covered 519 | work and works based on it. 520 | 521 | A patent license is "discriminatory" if it does not include within 522 | the scope of its coverage, prohibits the exercise of, or is 523 | conditioned on the non-exercise of one or more of the rights that are 524 | specifically granted under this License. You may not convey a covered 525 | work if you are a party to an arrangement with a third party that is 526 | in the business of distributing software, under which you make payment 527 | to the third party based on the extent of your activity of conveying 528 | the work, and under which the third party grants, to any of the 529 | parties who would receive the covered work from you, a discriminatory 530 | patent license (a) in connection with copies of the covered work 531 | conveyed by you (or copies made from those copies), or (b) primarily 532 | for and in connection with specific products or compilations that 533 | contain the covered work, unless you entered into that arrangement, 534 | or that patent license was granted, prior to 28 March 2007. 535 | 536 | Nothing in this License shall be construed as excluding or limiting 537 | any implied license or other defenses to infringement that may 538 | otherwise be available to you under applicable patent law. 539 | 540 | 12. No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | CC = gcc 2 | CFLAGS = -std=gnu99 -Wall -g 3 | FILES = src/*.c 4 | OUT_EXE = bin/echobot 5 | LIBS = -lpthread -lsodium -ltoxcore 6 | 7 | build: 8 | mkdir -p bin 9 | $(CC) $(CFLAGS) $(INCLUDES) -o $(OUT_EXE) $(FILES) $(LIBS) 10 | 11 | clean: 12 | rm -f $(OUT_EXE) 13 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # EchoBot 2 | 3 | A tiny bot to test Tox audio and video. 4 | 5 | ~~Add 6 | __76518406F6A9F2217E8DC487CC783C25CC16A15EB36FF32E335A235342C48A39218F515C39A6__ 7 | to your friends list and give it a spin!~~ 8 | 9 | The bot is temporarily offline until 10 | https://github.com/TokTok/c-toxcore/issues/2178 is fixed. 11 | 12 | ## Compiling 13 | 14 | 1. Install libsodium and [c-toxcore](https://github.com/TokTok/c-toxcore) 15 | 2. Run ``make`` 16 | 3. Run ``./bin/echobot`` to start EchoBot. 17 | -------------------------------------------------------------------------------- /etc/echobot.service: -------------------------------------------------------------------------------- 1 | [Unit] 2 | Description=Echobot 3 | After=network.target 4 | 5 | [Service] 6 | WorkingDirectory=/var/lib/echobot 7 | ExecStart=/usr/local/bin/echobot 8 | User=echobot 9 | Group=echobot 10 | UMask=077 11 | Restart=always 12 | 13 | [Install] 14 | WantedBy=multi-user.target 15 | -------------------------------------------------------------------------------- /flake.lock: -------------------------------------------------------------------------------- 1 | { 2 | "nodes": { 3 | "flake-utils": { 4 | "inputs": { 5 | "systems": "systems" 6 | }, 7 | "locked": { 8 | "lastModified": 1701680307, 9 | "narHash": "sha256-kAuep2h5ajznlPMD9rnQyffWG8EM/C73lejGofXvdM8=", 10 | "owner": "numtide", 11 | "repo": "flake-utils", 12 | "rev": "4022d587cbbfd70fe950c1e2083a02621806a725", 13 | "type": "github" 14 | }, 15 | "original": { 16 | "owner": "numtide", 17 | "repo": "flake-utils", 18 | "type": "github" 19 | } 20 | }, 21 | "nixpkgs": { 22 | "locked": { 23 | "lastModified": 1702312524, 24 | "narHash": "sha256-gkZJRDBUCpTPBvQk25G0B7vfbpEYM5s5OZqghkjZsnE=", 25 | "owner": "NixOS", 26 | "repo": "nixpkgs", 27 | "rev": "a9bf124c46ef298113270b1f84a164865987a91c", 28 | "type": "github" 29 | }, 30 | "original": { 31 | "owner": "NixOS", 32 | "ref": "nixos-unstable", 33 | "repo": "nixpkgs", 34 | "type": "github" 35 | } 36 | }, 37 | "root": { 38 | "inputs": { 39 | "flake-utils": "flake-utils", 40 | "nixpkgs": "nixpkgs" 41 | } 42 | }, 43 | "systems": { 44 | "locked": { 45 | "lastModified": 1681028828, 46 | "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=", 47 | "owner": "nix-systems", 48 | "repo": "default", 49 | "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e", 50 | "type": "github" 51 | }, 52 | "original": { 53 | "owner": "nix-systems", 54 | "repo": "default", 55 | "type": "github" 56 | } 57 | } 58 | }, 59 | "root": "root", 60 | "version": 7 61 | } 62 | -------------------------------------------------------------------------------- /flake.nix: -------------------------------------------------------------------------------- 1 | { 2 | inputs = { 3 | nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable"; 4 | flake-utils.url = "github:numtide/flake-utils"; 5 | }; 6 | outputs = { self, nixpkgs, flake-utils }: 7 | flake-utils.lib.eachDefaultSystem 8 | (system: 9 | let 10 | pkgs = import nixpkgs { 11 | inherit system; 12 | }; 13 | in with pkgs; { 14 | devShells.default = mkShell { 15 | hardeningDisable = [ "fortify" ]; 16 | depsBuildBuild = [ pkg-config ]; 17 | nativeBuildInputs = [ gcc gnumake pkg-config ]; 18 | buildInputs = [ 19 | libtoxcore 20 | libsodium 21 | ]; 22 | }; 23 | } 24 | ); 25 | } 26 | -------------------------------------------------------------------------------- /src/echobot.c: -------------------------------------------------------------------------------- 1 | #define _GNU_SOURCE 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | 10 | #include 11 | #include 12 | #include 13 | 14 | static uint64_t start_time; 15 | static bool signal_exit = false; 16 | 17 | static const int32_t audio_bitrate = 48; 18 | static const int32_t video_bitrate = 5000; 19 | static const char *data_filename = "data"; 20 | 21 | static Tox *g_tox = NULL; 22 | static ToxAV *g_toxAV = NULL; 23 | 24 | struct tox_node { 25 | const char *key; 26 | const char *hostname; 27 | uint16_t port; 28 | }; 29 | 30 | static void friend_cleanup(Tox *tox) { 31 | uint32_t friend_count = tox_self_get_friend_list_size(tox); 32 | if (friend_count == 0) { 33 | return; 34 | } 35 | 36 | uint32_t friends[friend_count]; 37 | tox_self_get_friend_list(tox, friends); 38 | 39 | uint64_t curr_time = time(NULL); 40 | for (uint32_t i = 0; i < friend_count; i++) { 41 | TOX_ERR_FRIEND_GET_LAST_ONLINE err; 42 | uint32_t friend = friends[i]; 43 | uint64_t last_online = tox_friend_get_last_online(tox, friend, &err); 44 | 45 | if (err != TOX_ERR_FRIEND_GET_LAST_ONLINE_OK) { 46 | fprintf(stderr, "Couldn't obtain 'last online' (this should never happen)\n"); 47 | continue; 48 | } 49 | 50 | if (curr_time - last_online > 2629743) { 51 | fprintf(stderr, "Removing friend %d\n", friend); 52 | tox_friend_delete(tox, friend, NULL); 53 | } 54 | } 55 | } 56 | 57 | static bool save_profile(Tox *tox) { 58 | uint32_t save_size = tox_get_savedata_size(tox); 59 | uint8_t save_data[save_size]; 60 | 61 | tox_get_savedata(tox, save_data); 62 | 63 | FILE *file = fopen(data_filename, "wb"); 64 | if (file) { 65 | fwrite(save_data, sizeof(uint8_t), save_size, file); 66 | fclose(file); 67 | return true; 68 | } else { 69 | fprintf(stderr, "Could not write profile to disk\n"); 70 | return false; 71 | } 72 | } 73 | 74 | static void *run_toxav(void *arg) { 75 | ToxAV *toxav = (ToxAV *)arg; 76 | fprintf(stderr, "Starting toxav thread\n"); 77 | 78 | while (!signal_exit) { 79 | toxav_iterate(toxav); 80 | 81 | long long time = toxav_iteration_interval(toxav) * 1000000L; 82 | nanosleep((const struct timespec[]){{0, time}}, NULL); 83 | } 84 | 85 | fprintf(stderr, "Shut down toxav thread\n"); 86 | return NULL; 87 | } 88 | 89 | static void *run_tox(void *arg) { 90 | Tox *tox = (Tox *)arg; 91 | fprintf(stderr, "Starting tox thread\n"); 92 | 93 | uint64_t last_purge = 0; 94 | while (!signal_exit) { 95 | tox_iterate(tox, NULL); 96 | 97 | uint64_t curr_time = time(NULL); 98 | if (curr_time - last_purge > 1800) { 99 | friend_cleanup(tox); 100 | save_profile(tox); 101 | 102 | last_purge = curr_time; 103 | } 104 | 105 | long long time = tox_iteration_interval(tox) * 1000000L; 106 | nanosleep((const struct timespec[]){{0, time}}, NULL); 107 | } 108 | 109 | fprintf(stderr, "Shut down tox thread\n"); 110 | return NULL; 111 | } 112 | 113 | static TOX_ERR_BOOTSTRAP bootstrap(Tox *tox, struct tox_node *node) { 114 | uint8_t key[TOX_PUBLIC_KEY_SIZE]; 115 | sodium_hex2bin(key, sizeof(key), node->key, strlen(node->key), NULL, NULL, NULL); 116 | 117 | TOX_ERR_BOOTSTRAP err; 118 | tox_bootstrap(tox, node->hostname, node->port, key, &err); 119 | return err; 120 | } 121 | 122 | static void get_elapsed_time_str(char *buf, int bufsize, uint64_t secs) { 123 | long unsigned int minutes = (secs % 3600) / 60; 124 | long unsigned int hours = (secs / 3600) % 24; 125 | long unsigned int days = (secs / 3600) / 24; 126 | 127 | snprintf(buf, bufsize, "%lud %luh %lum", days, hours, minutes); 128 | } 129 | 130 | static bool file_exists(const char *filename) { 131 | return access(filename, 0) != -1; 132 | } 133 | 134 | static bool load_profile(Tox **tox, struct Tox_Options *options) { 135 | FILE *file = fopen(data_filename, "rb"); 136 | 137 | if (file) { 138 | fseek(file, 0, SEEK_END); 139 | long file_size = ftell(file); 140 | fseek(file, 0, SEEK_SET); 141 | 142 | uint8_t *save_data = (uint8_t *)malloc(file_size * sizeof(uint8_t)); 143 | fread(save_data, sizeof(uint8_t), file_size, file); 144 | fclose(file); 145 | 146 | options->savedata_data = save_data; 147 | options->savedata_type = TOX_SAVEDATA_TYPE_TOX_SAVE; 148 | options->savedata_length = file_size; 149 | 150 | TOX_ERR_NEW err; 151 | *tox = tox_new(options, &err); 152 | free(save_data); 153 | 154 | return err == TOX_ERR_NEW_OK; 155 | } 156 | 157 | return false; 158 | } 159 | 160 | static uint32_t get_online_friend_count(Tox *tox) { 161 | uint32_t friend_count = tox_self_get_friend_list_size(tox); 162 | uint32_t friends[friend_count]; 163 | tox_self_get_friend_list(tox, friends); 164 | 165 | uint32_t online_friend_count = 0u; 166 | for (uint32_t i = 0; i < friend_count; i++) { 167 | if (tox_friend_get_connection_status(tox, friends[i], NULL) != TOX_CONNECTION_NONE) { 168 | online_friend_count++; 169 | } 170 | } 171 | 172 | return online_friend_count; 173 | } 174 | 175 | static void self_connection_status(Tox *tox, TOX_CONNECTION status, void *userData) { 176 | if (status == TOX_CONNECTION_NONE) { 177 | fprintf(stderr, "Lost connection to the tox network\n"); 178 | } else { 179 | fprintf(stderr, "Connected to the tox network, status: %d\n", status); 180 | } 181 | } 182 | 183 | static void friend_request(Tox *tox, const uint8_t *public_key, const uint8_t *message, size_t length, void *user_data) { 184 | TOX_ERR_FRIEND_ADD err; 185 | tox_friend_add_norequest(tox, public_key, &err); 186 | 187 | if (err != TOX_ERR_FRIEND_ADD_OK) { 188 | fprintf(stderr, "Could not add friend, error: %d\n", err); 189 | } else { 190 | fprintf(stderr, "Added to our friend list\n"); 191 | } 192 | 193 | save_profile(tox); 194 | } 195 | 196 | static void friend_message(Tox *tox, uint32_t friend_number, TOX_MESSAGE_TYPE type, const uint8_t *message, size_t length, void *user_data) { 197 | char dest_msg[length + 1]; 198 | dest_msg[length] = '\0'; 199 | memcpy(dest_msg, message, length); 200 | 201 | if (!strcmp("!info", dest_msg)) { 202 | char res_msg[TOX_MAX_MESSAGE_LENGTH]; 203 | char time_str[64]; 204 | uint64_t cur_time = time(NULL); 205 | 206 | get_elapsed_time_str(time_str, sizeof(time_str), cur_time - start_time); 207 | snprintf(res_msg, sizeof(res_msg), "Uptime: %s", time_str); 208 | tox_friend_send_message(tox, friend_number, TOX_MESSAGE_TYPE_NORMAL, (uint8_t *)res_msg, strlen(res_msg), NULL); 209 | 210 | snprintf(res_msg, sizeof(res_msg), "Toxcore: %llu.%llu.%llu", (long long unsigned int)tox_version_major(), (long long unsigned int)tox_version_minor(), (long long unsigned int)tox_version_patch()); 211 | tox_friend_send_message(tox, friend_number, TOX_MESSAGE_TYPE_NORMAL, (uint8_t *)res_msg, strlen(res_msg), NULL); 212 | 213 | const char *github_msg = "Source: https://github.com/alexbakker/EchoBot"; 214 | tox_friend_send_message(tox, friend_number, TOX_MESSAGE_TYPE_NORMAL, (uint8_t *)github_msg, strlen(github_msg), NULL); 215 | 216 | snprintf(res_msg, sizeof(res_msg), "Friends: %zu (%d online)", tox_self_get_friend_list_size(tox), get_online_friend_count(tox)); 217 | tox_friend_send_message(tox, friend_number, TOX_MESSAGE_TYPE_NORMAL, (uint8_t *)res_msg, strlen(res_msg), NULL); 218 | 219 | const char *friend_info_msg = "Friends are removed after 1 month of inactivity"; 220 | tox_friend_send_message(tox, friend_number, TOX_MESSAGE_TYPE_NORMAL, (uint8_t *)friend_info_msg, strlen(friend_info_msg), NULL); 221 | 222 | const char *info_msg = "If you're experiencing issues, contact alexbakker in #tox at Libera Chat"; 223 | tox_friend_send_message(tox, friend_number, TOX_MESSAGE_TYPE_NORMAL, (uint8_t *)info_msg, strlen(info_msg), NULL); 224 | } else if (!strcmp("!callme", dest_msg)) { 225 | toxav_call(g_toxAV, friend_number, audio_bitrate, 0, NULL); 226 | } else if (!strcmp ("!videocallme", dest_msg)) { 227 | toxav_call (g_toxAV, friend_number, audio_bitrate, video_bitrate, NULL); 228 | } else { 229 | tox_friend_send_message (tox, friend_number, TOX_MESSAGE_TYPE_NORMAL, message, length, NULL); 230 | 231 | static const char *help_msg = "EchoBot commands:\n!info: Show stats.\n!callme: Launch an audio call.\n!videocallme: Launch a video call."; 232 | tox_friend_send_message (tox, friend_number, TOX_MESSAGE_TYPE_NORMAL, (uint8_t*) help_msg, strlen (help_msg), NULL); 233 | } 234 | } 235 | 236 | static void file_recv(Tox *tox, uint32_t friend_number, uint32_t file_number, uint32_t kind, uint64_t file_size, const uint8_t *filename, size_t filename_length, void *user_data) { 237 | if (kind == TOX_FILE_KIND_AVATAR) { 238 | return; 239 | } 240 | 241 | tox_file_control(tox, friend_number, file_number, TOX_FILE_CONTROL_CANCEL, NULL); 242 | 243 | const char *msg = "Sorry, I don't support file transfers."; 244 | tox_friend_send_message(tox, friend_number, TOX_MESSAGE_TYPE_NORMAL, (uint8_t*)msg, strlen(msg), NULL); 245 | } 246 | 247 | static void call(ToxAV *toxAV, uint32_t friend_number, bool audio_enabled, bool video_enabled, void *user_data) { 248 | TOXAV_ERR_ANSWER err; 249 | toxav_answer(toxAV, friend_number, audio_enabled ? audio_bitrate : 0, video_enabled ? video_bitrate : 0, &err); 250 | 251 | if (err != TOXAV_ERR_ANSWER_OK) { 252 | fprintf(stderr, "Could not answer call, friend: %d, error: %d\n", friend_number, err); 253 | } 254 | } 255 | 256 | static void call_state(ToxAV *toxAV, uint32_t friend_number, uint32_t state, void *user_data) { 257 | if (state & TOXAV_FRIEND_CALL_STATE_FINISHED) { 258 | fprintf(stderr, "Call with friend %d finished\n", friend_number); 259 | return; 260 | } else if (state & TOXAV_FRIEND_CALL_STATE_ERROR) { 261 | fprintf(stderr, "Call with friend %d errored\n", friend_number); 262 | return; 263 | } 264 | 265 | bool send_audio = (state & TOXAV_FRIEND_CALL_STATE_SENDING_A) && (state & TOXAV_FRIEND_CALL_STATE_ACCEPTING_A); 266 | bool send_video = state & TOXAV_FRIEND_CALL_STATE_SENDING_V && (state & TOXAV_FRIEND_CALL_STATE_ACCEPTING_V); 267 | toxav_audio_set_bit_rate(toxAV, friend_number, send_audio ? audio_bitrate : 0, NULL); 268 | toxav_video_set_bit_rate(toxAV, friend_number, send_video ? video_bitrate : 0, NULL); 269 | 270 | fprintf(stderr, "Call state for friend %d changed to %d: audio: %d, video: %d\n", friend_number, state, send_audio, send_video); 271 | } 272 | 273 | static void audio_receive_frame(ToxAV *toxAV, uint32_t friend_number, const int16_t *pcm, size_t sample_count, uint8_t channels, uint32_t sampling_rate, void *user_data) { 274 | TOXAV_ERR_SEND_FRAME err; 275 | toxav_audio_send_frame(toxAV, friend_number, pcm, sample_count, channels, sampling_rate, &err); 276 | 277 | if (err != TOXAV_ERR_SEND_FRAME_OK) { 278 | fprintf(stderr, "Could not send audio frame to friend: %d, error: %d\n", friend_number, err); 279 | } 280 | } 281 | 282 | static void video_receive_frame(ToxAV *toxAV, uint32_t friend_number, uint16_t width, uint16_t height, const uint8_t *y, const uint8_t *u, const uint8_t *v, int32_t ystride, int32_t ustride, int32_t vstride, void *user_data) { 283 | ystride = abs(ystride); 284 | ustride = abs(ustride); 285 | vstride = abs(vstride); 286 | if (ystride < width || ustride < width / 2 || vstride < width / 2) { 287 | return; 288 | } 289 | 290 | uint8_t *y_dest = (uint8_t *)malloc(width * height); 291 | uint8_t *u_dest = (uint8_t *)malloc(width * height / 2); 292 | uint8_t *v_dest = (uint8_t *)malloc(width * height / 2); 293 | 294 | for (size_t h = 0; h < height; h++) { 295 | memcpy(&y_dest[h * width], &y[h * ystride], width); 296 | } 297 | 298 | for (size_t h = 0; h < height / 2; h++) { 299 | memcpy(&u_dest[h * width / 2], &u[h * ustride], width / 2); 300 | memcpy(&v_dest[h * width / 2], &v[h * vstride], width / 2); 301 | } 302 | 303 | TOXAV_ERR_SEND_FRAME err; 304 | toxav_video_send_frame(toxAV, friend_number, width, height, y_dest, u_dest, v_dest, &err); 305 | 306 | free(y_dest); 307 | free(u_dest); 308 | free(v_dest); 309 | 310 | if (err != TOXAV_ERR_SEND_FRAME_OK) { 311 | fprintf(stderr, "Could not send video frame to friend: %d, error: %d\n", friend_number, err); 312 | } 313 | } 314 | 315 | int main(int argc, char *argv[]) { 316 | start_time = time(NULL); 317 | 318 | TOX_ERR_NEW err = TOX_ERR_NEW_OK; 319 | struct Tox_Options options; 320 | tox_options_default(&options); 321 | 322 | if (file_exists(data_filename)) { 323 | if (load_profile(&g_tox, &options)) { 324 | fprintf(stderr, "Loaded profile from disk\n"); 325 | } else { 326 | fprintf(stderr, "Failed to load profile from disk\n"); 327 | return -1; 328 | } 329 | } else { 330 | fprintf(stderr, "Creating a new profile\n"); 331 | 332 | g_tox = tox_new(&options, &err); 333 | save_profile(g_tox); 334 | } 335 | 336 | tox_callback_self_connection_status(g_tox, self_connection_status); 337 | tox_callback_friend_request(g_tox, friend_request); 338 | tox_callback_friend_message(g_tox, friend_message); 339 | tox_callback_file_recv(g_tox, file_recv); 340 | 341 | if (err != TOX_ERR_NEW_OK) { 342 | fprintf(stderr, "Error returned by tox_new: %d\n", err); 343 | return -1; 344 | } 345 | 346 | uint8_t address_bin[TOX_ADDRESS_SIZE]; 347 | tox_self_get_address(g_tox, (uint8_t *)address_bin); 348 | char address_hex[TOX_ADDRESS_SIZE * 2 + 1]; 349 | sodium_bin2hex(address_hex, sizeof(address_hex), address_bin, sizeof(address_bin)); 350 | 351 | fprintf(stderr, "Our Tox ID: %s\n", address_hex); 352 | 353 | const char *name = "EchoBot"; 354 | const char *status_msg = "Tox audio/video testing service. Send '!info' for stats."; 355 | 356 | tox_self_set_name(g_tox, (uint8_t *)name, strlen(name), NULL); 357 | tox_self_set_status_message(g_tox, (uint8_t *)status_msg, strlen(status_msg), NULL); 358 | 359 | struct tox_node nodes[] = { 360 | {"7A6098B590BDC73F9723FC59F82B3F9085A64D1B213AAF8E610FD351930D052D", "tox2.abilinski.com", 33445}, 361 | {"3F0A45A268367C1BEA652F258C85F4A66DA76BCAA667A49E770BCC4917AB6A25", "tox.initramfs.io", 33445}, 362 | {"DA4E4ED4B697F2E9B000EEFE3A34B554ACD3F45F5C96EAEA2516DD7FF9AF7B43", "85.143.221.42", 33445}, 363 | {"1C5293AEF2114717547B39DA8EA6F1E331E5E358B35F9B6B5F19317911C5F976", "tox.verdict.gg", 33445}, 364 | {"BEF0CFB37AF874BD17B9A8F9FE64C75521DB95A37D33C5BDB00E9CF58659C04F", "198.199.98.108", 33445}, 365 | {"82EF82BA33445A1F91A7DB27189ECFC0C013E06E3DA71F588ED692BED625EC23", "tox.kurnevsky.net", 33445}, 366 | {"B3E5FA80DC8EBD1149AD2AB35ED8B85BD546DEDE261CA593234C619249419506", "tox1.mf-net.eu", 33445} 367 | }; 368 | 369 | bool bootstrap_success = false; 370 | for (size_t i = 0; i < sizeof(nodes) / sizeof(struct tox_node); i++) { 371 | struct tox_node *node = &nodes[i]; 372 | fprintf(stderr, "Bootstrapping from node: %s\n", node->hostname); 373 | 374 | TOX_ERR_BOOTSTRAP err = bootstrap(g_tox, node); 375 | if (err != TOX_ERR_BOOTSTRAP_OK) { 376 | fprintf(stderr, "Could not bootstrap from %s: %d\n", node->hostname, err); 377 | } else { 378 | bootstrap_success = true; 379 | } 380 | } 381 | if (!bootstrap_success) { 382 | fprintf(stderr, "Could not bootstrap from any nodes"); 383 | return -1; 384 | } 385 | 386 | TOXAV_ERR_NEW err2; 387 | g_toxAV = toxav_new(g_tox, &err2); 388 | toxav_callback_call(g_toxAV, call, NULL); 389 | toxav_callback_call_state(g_toxAV, call_state, NULL); 390 | toxav_callback_audio_receive_frame(g_toxAV, audio_receive_frame, NULL); 391 | toxav_callback_video_receive_frame(g_toxAV, video_receive_frame, NULL); 392 | 393 | if (err2 != TOXAV_ERR_NEW_OK) { 394 | fprintf(stderr, "Error returned by toxav_new: %d\n", err); 395 | return -1; 396 | } 397 | 398 | sigset_t sig_set; 399 | sigemptyset(&sig_set); 400 | sigaddset(&sig_set, SIGTERM); 401 | sigaddset(&sig_set, SIGINT); 402 | 403 | pthread_t tox_thread, toxav_thread; 404 | pthread_sigmask(SIG_BLOCK, &sig_set, NULL); 405 | pthread_create(&tox_thread, NULL, &run_tox, g_tox); 406 | pthread_setname_np(tox_thread, "echobot:tox"); 407 | pthread_create(&toxav_thread, NULL, &run_toxav, g_toxAV); 408 | pthread_setname_np(toxav_thread, "echobot:toxav"); 409 | 410 | int sig; 411 | sigwait(&sig_set, &sig); 412 | fprintf(stderr, "Shutdown signal received\n"); 413 | signal_exit = true; 414 | fprintf(stderr, "Waiting for tox and toxav threads to finish\n"); 415 | pthread_join(tox_thread, NULL); 416 | pthread_join(toxav_thread, NULL); 417 | 418 | fprintf(stderr, "Saving profile to disk and killing tox/toxav\n"); 419 | save_profile(g_tox); 420 | toxav_kill(g_toxAV); 421 | tox_kill(g_tox); 422 | return 0; 423 | } 424 | --------------------------------------------------------------------------------