[3882] | 1 | //proto.c: |
---|
| 2 | |
---|
| 3 | /* |
---|
[5823] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2013 |
---|
[3882] | 5 | * |
---|
| 6 | * This file is part of libroar a part of RoarAudio, |
---|
| 7 | * a cross-platform sound system for both, home and professional use. |
---|
| 8 | * See README for details. |
---|
| 9 | * |
---|
| 10 | * This file is free software; you can redistribute it and/or modify |
---|
| 11 | * it under the terms of the GNU General Public License version 3 |
---|
| 12 | * as published by the Free Software Foundation. |
---|
| 13 | * |
---|
| 14 | * libroar is distributed in the hope that it will be useful, |
---|
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
| 17 | * GNU General Public License for more details. |
---|
| 18 | * |
---|
| 19 | * You should have received a copy of the GNU General Public License |
---|
| 20 | * along with this software; see the file COPYING. If not, write to |
---|
| 21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
---|
| 22 | * Boston, MA 02110-1301, USA. |
---|
| 23 | * |
---|
| 24 | * NOTE for everyone want's to change something and send patches: |
---|
| 25 | * read README and HACKING! There a addition information on |
---|
| 26 | * the license of this document you need to read before you send |
---|
| 27 | * any patches. |
---|
| 28 | * |
---|
| 29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
---|
| 30 | * or libpulse*: |
---|
| 31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
---|
| 32 | * and are therefore GPL. Because of this it may be illigal to use |
---|
| 33 | * them with any software that uses libesd, libartsc or libpulse*. |
---|
| 34 | */ |
---|
| 35 | |
---|
| 36 | #include "libroar.h" |
---|
| 37 | |
---|
[3887] | 38 | #define _ROAR_MESS_BUF_LEN_V0 (1 /* version */ + 1 /* cmd */ + 2 /* stream */ + 4 /* pos */ + 2 /* datalen */) |
---|
| 39 | #define _ROAR_MESS_BUF_LEN_V1 (1 /* version */ + 1 /* cmd */ + 2 /* stream */ + 4 /* pos */ + 2 /* datalen */ + \ |
---|
| 40 | 1 /* flags */) |
---|
| 41 | #define _ROAR_MESS_BUF_LEN_V2 (1 /* version */ + 1 /* cmd */ + 2 /* stream */ + 8 /* pos */ + 2 /* datalen */ + \ |
---|
| 42 | 4 /* flags */ + 2 /* seq */) |
---|
| 43 | #define _ROAR_MESS_BUF_LEN _ROAR_MESS_BUF_LEN_V0 |
---|
| 44 | #define _ROAR_MESS_BUF_LEN_MAX ROAR_MAX3(_ROAR_MESS_BUF_LEN_V0, _ROAR_MESS_BUF_LEN_V1, _ROAR_MESS_BUF_LEN_V2) |
---|
| 45 | |
---|
| 46 | #define _ROAR_MESS_CRC_LEN_V0 0 /* No CRC */ |
---|
| 47 | #define _ROAR_MESS_CRC_LEN_V1 1 |
---|
| 48 | #define _ROAR_MESS_CRC_LEN_V2 4 |
---|
| 49 | #define _ROAR_MESS_CRC_LEN_MAX ROAR_MAX3(_ROAR_MESS_CRC_LEN_V0, _ROAR_MESS_CRC_LEN_V1, _ROAR_MESS_CRC_LEN_V2) |
---|
| 50 | |
---|
[3882] | 51 | int roar_send_message (struct roar_connection * con, struct roar_message * mes, char * data) { |
---|
| 52 | struct roar_vio_calls * vio; |
---|
| 53 | |
---|
| 54 | if ( (vio = roar_get_connection_vio2(con)) == NULL ) |
---|
| 55 | return -1; |
---|
| 56 | |
---|
| 57 | return roar_vsend_message(vio, mes, data); |
---|
| 58 | } |
---|
| 59 | |
---|
| 60 | int roar_vsend_message(struct roar_vio_calls * vio, struct roar_message * mes, char * data) { |
---|
[3887] | 61 | char buf[_ROAR_MESS_BUF_LEN_MAX]; |
---|
| 62 | char crc[_ROAR_MESS_CRC_LEN_MAX]; |
---|
| 63 | size_t headerlen = 0; |
---|
| 64 | size_t crclen = 0; |
---|
| 65 | char * bufptr; |
---|
[3882] | 66 | |
---|
[4873] | 67 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3882] | 68 | |
---|
| 69 | ROAR_DBG("roar_send_message(*): try to send an request..."); |
---|
| 70 | |
---|
[3887] | 71 | headerlen = _ROAR_MESS_BUF_LEN; |
---|
| 72 | |
---|
| 73 | buf[0] = mes->version; // first byte is always the version. |
---|
[3882] | 74 | |
---|
[3887] | 75 | switch (mes->version) { |
---|
| 76 | case 0: |
---|
| 77 | buf[1] = (unsigned char) mes->cmd; |
---|
| 78 | *(uint16_t*)(buf+2) = ROAR_HOST2NET16(mes->stream); |
---|
| 79 | *(uint32_t*)(buf+4) = ROAR_HOST2NET32(mes->pos); |
---|
| 80 | *(uint16_t*)(buf+8) = ROAR_HOST2NET16(mes->datalen); |
---|
| 81 | headerlen = _ROAR_MESS_BUF_LEN_V0; |
---|
| 82 | break; |
---|
| 83 | case 1: |
---|
| 84 | buf[1] = (unsigned char) (mes->flags & 0xFF); |
---|
| 85 | buf[2] = (unsigned char) mes->cmd; |
---|
| 86 | // ... |
---|
[4951] | 87 | roar_err_set(ROAR_ERROR_NSVERSION); |
---|
[3887] | 88 | return -1; |
---|
| 89 | break; |
---|
| 90 | case 2: |
---|
| 91 | headerlen = 16; |
---|
| 92 | buf[1] = (unsigned char) mes->cmd; |
---|
| 93 | *(uint16_t*)(buf+2) = ROAR_HOST2NET16(mes->stream); |
---|
| 94 | *(uint32_t*)(buf+4) = ROAR_HOST2NET32(mes->flags); |
---|
| 95 | if ( mes->flags & ROAR_MF_LSPOS ) { |
---|
[5463] | 96 | *(uint64_t*)(buf+8) = ROAR_HOST2NET64(mes->pos64); |
---|
[3887] | 97 | bufptr = buf+16; |
---|
| 98 | headerlen += 4; |
---|
| 99 | } else { |
---|
[5463] | 100 | *(uint32_t*)(buf+8) = ROAR_HOST2NET32(mes->pos); |
---|
[3887] | 101 | bufptr = buf+12; |
---|
| 102 | } |
---|
| 103 | *(uint16_t*)(bufptr+0) = ROAR_HOST2NET16(mes->datalen); |
---|
| 104 | *(uint16_t*)(bufptr+2) = ROAR_HOST2NET16(mes->seq); |
---|
| 105 | break; |
---|
| 106 | default: |
---|
[4951] | 107 | roar_err_set(ROAR_ERROR_BADVERSION); |
---|
[3887] | 108 | return -1; |
---|
| 109 | } |
---|
| 110 | |
---|
[5270] | 111 | if ( roar_vio_write(vio, buf, headerlen) != (ssize_t)headerlen ) { |
---|
[3882] | 112 | return -1; |
---|
| 113 | } |
---|
| 114 | |
---|
| 115 | if ( mes->datalen != 0 ) { |
---|
[5270] | 116 | if ( roar_vio_write(vio, data == NULL ? mes->data : data, mes->datalen) != (ssize_t)mes->datalen ) { |
---|
[3882] | 117 | return -1; |
---|
| 118 | } |
---|
| 119 | } |
---|
| 120 | |
---|
[3887] | 121 | if ( crclen != 0 ) { |
---|
[5270] | 122 | if ( roar_vio_write(vio, crc, crclen) != (ssize_t)crclen ) { |
---|
[3887] | 123 | return -1; |
---|
| 124 | } |
---|
| 125 | } |
---|
| 126 | |
---|
[4873] | 127 | roar_err_clear(); |
---|
[3882] | 128 | |
---|
| 129 | ROAR_DBG("roar_send_message(*) = 0"); |
---|
| 130 | return 0; |
---|
| 131 | } |
---|
| 132 | |
---|
| 133 | int roar_recv_message (struct roar_connection * con, struct roar_message * mes, char ** data) { |
---|
[5146] | 134 | return roar_recv_message2(con, mes, data, NULL); |
---|
| 135 | } |
---|
| 136 | int roar_recv_message2 (struct roar_connection * con, struct roar_message * mes, char ** data, |
---|
| 137 | struct roar_error_frame * errorframe) { |
---|
[3882] | 138 | struct roar_vio_calls * vio; |
---|
| 139 | |
---|
| 140 | if ( (vio = roar_get_connection_vio2(con)) == NULL ) |
---|
| 141 | return -1; |
---|
| 142 | |
---|
[5146] | 143 | return roar_vrecv_message2(vio, mes, data, errorframe); |
---|
[3882] | 144 | } |
---|
| 145 | |
---|
| 146 | int roar_vrecv_message(struct roar_vio_calls * vio, struct roar_message * mes, char ** data) { |
---|
[5146] | 147 | return roar_vrecv_message2(vio, mes, data, NULL); |
---|
| 148 | } |
---|
| 149 | |
---|
[5608] | 150 | static inline int _libroar_msgresyncer(struct roar_vio_calls * vio, size_t len) { |
---|
| 151 | char buffer[2*LIBROAR_BUFFER_MSGDATA]; // this is always called with len > LIBROAR_BUFFER_MSGDATA. |
---|
| 152 | ssize_t ret; |
---|
| 153 | size_t errorc = 0; |
---|
| 154 | |
---|
| 155 | while (len && errorc < 4) { |
---|
| 156 | ret = roar_vio_read(vio, buffer, len > sizeof(buffer) ? sizeof(buffer) : len); |
---|
| 157 | if ( ret == (size_t)-1 ) { |
---|
| 158 | errorc++; |
---|
| 159 | } else { |
---|
| 160 | errorc = 0; |
---|
| 161 | len -= ret; |
---|
| 162 | } |
---|
| 163 | } |
---|
| 164 | |
---|
| 165 | if ( len ) |
---|
| 166 | return -1; // last error is still set. |
---|
| 167 | return 0; |
---|
| 168 | } |
---|
| 169 | |
---|
[5146] | 170 | int roar_vrecv_message2(struct roar_vio_calls * vio, struct roar_message * mes, char ** data, |
---|
| 171 | struct roar_error_frame * errorframe) { |
---|
[3887] | 172 | // TODO: add CRC support. |
---|
| 173 | char buf[_ROAR_MESS_BUF_LEN_MAX]; |
---|
| 174 | // char crc[_ROAR_MESS_CRC_LEN_MAX]; |
---|
| 175 | size_t headerlen = 0; |
---|
| 176 | // size_t crclen = 0; |
---|
| 177 | size_t needlen; |
---|
| 178 | char * bufptr; |
---|
[3882] | 179 | |
---|
[4873] | 180 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3882] | 181 | |
---|
[5146] | 182 | ROAR_DBG("roar_vrecv_message2(vio=%p, mes=%p, data=%p, errorframe=%p) = ?", vio, mes, data, errorframe); |
---|
| 183 | |
---|
| 184 | ROAR_DBG("roar_vrecv_message2(*): try to get a response form the server..."); |
---|
[3882] | 185 | |
---|
[5146] | 186 | if ( vio == NULL || mes == NULL ) { |
---|
| 187 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3882] | 188 | return -1; |
---|
[5146] | 189 | } |
---|
[3882] | 190 | |
---|
| 191 | if ( data != NULL ) |
---|
| 192 | *data = NULL; |
---|
| 193 | |
---|
| 194 | memset(mes, 0, sizeof(struct roar_message)); |
---|
| 195 | |
---|
[3887] | 196 | if ( roar_vio_read(vio, buf, _ROAR_MESS_BUF_LEN_V0) != _ROAR_MESS_BUF_LEN_V0 ) { |
---|
[4873] | 197 | roar_err_set(ROAR_ERROR_PROTO); |
---|
[3882] | 198 | return -1; |
---|
| 199 | } |
---|
| 200 | |
---|
[5146] | 201 | ROAR_DBG("roar_vrecv_message2(*): Got a header"); |
---|
[3882] | 202 | |
---|
[3887] | 203 | mes->version = buf[0]; |
---|
| 204 | headerlen = _ROAR_MESS_BUF_LEN_V0; |
---|
| 205 | |
---|
| 206 | switch (mes->version) { |
---|
| 207 | case 0: |
---|
| 208 | // we already have all data, so create the struct |
---|
| 209 | mes->cmd = (unsigned char)buf[1]; |
---|
| 210 | mes->stream = ROAR_NET2HOST16(*(uint16_t*)(buf+2)); |
---|
| 211 | mes->pos = ROAR_NET2HOST32(*(uint32_t*)(buf+4)); |
---|
[5463] | 212 | mes->pos64 = mes->pos; |
---|
[3887] | 213 | mes->datalen = ROAR_NET2HOST16(*(uint16_t*)(buf+8)); |
---|
| 214 | break; |
---|
| 215 | case 2: |
---|
| 216 | mes->cmd = (unsigned char)buf[1]; |
---|
| 217 | mes->stream = ROAR_NET2HOST16(*(uint16_t*)(buf+2)); |
---|
| 218 | mes->flags = ROAR_NET2HOST32(*(uint32_t*)(buf+4)); |
---|
| 219 | if ( mes->flags & ROAR_MF_LSPOS ) { |
---|
| 220 | headerlen = 20; |
---|
| 221 | } else { |
---|
| 222 | headerlen = 16; |
---|
| 223 | } |
---|
| 224 | break; |
---|
| 225 | default: |
---|
[4951] | 226 | roar_err_set(ROAR_ERROR_NSVERSION); |
---|
[3887] | 227 | return -1; |
---|
| 228 | break; |
---|
[3882] | 229 | } |
---|
| 230 | |
---|
[5637] | 231 | // check special case where headerlen < _ROAR_MESS_BUF_LEN_V0, this means that we need to put |
---|
[3887] | 232 | // some data we read as header into the data part of the message. |
---|
| 233 | if ( headerlen > _ROAR_MESS_BUF_LEN_V0 ) { |
---|
| 234 | needlen = headerlen - _ROAR_MESS_BUF_LEN_V0; |
---|
| 235 | if ( roar_vio_read(vio, buf+_ROAR_MESS_BUF_LEN_V0, needlen) != (ssize_t)needlen ) { |
---|
[4873] | 236 | roar_err_set(ROAR_ERROR_PROTO); |
---|
[3887] | 237 | return -1; |
---|
| 238 | } |
---|
| 239 | } |
---|
| 240 | |
---|
| 241 | switch (mes->version) { |
---|
| 242 | case 2: |
---|
| 243 | if ( mes->flags & ROAR_MF_LSPOS ) { |
---|
| 244 | mes->pos64 = ROAR_NET2HOST32(*(uint64_t*)(buf+8)); |
---|
[5463] | 245 | mes->pos = mes->pos64 & (uint64_t)0x0FFFFFFFFLLU; |
---|
[3887] | 246 | bufptr = buf+16; |
---|
| 247 | } else { |
---|
| 248 | mes->pos = ROAR_NET2HOST32(*(uint32_t*)(buf+8)); |
---|
[5463] | 249 | mes->pos64 = mes->pos; |
---|
[3887] | 250 | bufptr = buf+12; |
---|
| 251 | } |
---|
| 252 | mes->datalen = ROAR_NET2HOST16(*(uint16_t*)(bufptr+0)); |
---|
[5467] | 253 | mes->seq = ROAR_NET2HOST16(*(uint16_t*)(bufptr+2)); |
---|
[3887] | 254 | break; |
---|
| 255 | } |
---|
[3882] | 256 | |
---|
| 257 | if ( (int16_t)mes->stream == -1 ) |
---|
| 258 | mes->stream = -1; |
---|
| 259 | |
---|
[5146] | 260 | ROAR_DBG("roar_vrecv_message2(*): command=%i(%s)", mes->cmd, |
---|
[3882] | 261 | mes->cmd == ROAR_CMD_OK ? "OK" : (mes->cmd == ROAR_CMD_ERROR ? "ERROR" : "UNKNOWN")); |
---|
| 262 | |
---|
[3887] | 263 | // Below we only have data handling, handling of header is finished: |
---|
| 264 | |
---|
[3882] | 265 | if ( mes->datalen == 0 ) { |
---|
[5146] | 266 | ROAR_DBG("roar_vrecv_message2(*): no data in this pkg"); |
---|
| 267 | if ( mes->cmd == ROAR_CMD_ERROR && errorframe != NULL ) { |
---|
| 268 | roar_err_init(errorframe); |
---|
| 269 | } |
---|
[4873] | 270 | roar_err_clear(); |
---|
[5146] | 271 | ROAR_DBG("roar_vrecv_message2(*) = 0"); |
---|
[3882] | 272 | return 0; |
---|
| 273 | } |
---|
| 274 | |
---|
| 275 | if ( mes->datalen <= LIBROAR_BUFFER_MSGDATA ) { |
---|
[5270] | 276 | if ( roar_vio_read(vio, mes->data, mes->datalen) == (ssize_t)mes->datalen ) { |
---|
[5146] | 277 | ROAR_DBG("roar_vrecv_message2(*): Got data!"); |
---|
[4873] | 278 | roar_err_clear(); |
---|
[5146] | 279 | if ( mes->cmd == ROAR_CMD_ERROR && errorframe != NULL ) { |
---|
[5216] | 280 | if ( roar_err_parsemsg(mes, *data, errorframe) != 0 ) { |
---|
[5146] | 281 | roar_err_init(errorframe); |
---|
| 282 | } |
---|
| 283 | } |
---|
| 284 | ROAR_DBG("roar_vrecv_message2(*) = 0"); |
---|
[3882] | 285 | return 0; |
---|
| 286 | } |
---|
| 287 | |
---|
| 288 | return -1; |
---|
| 289 | } else { |
---|
| 290 | if ( data == NULL ) { |
---|
[5608] | 291 | if ( _libroar_msgresyncer(vio, mes->datalen) == -1 ) { |
---|
| 292 | roar_err_set(ROAR_ERROR_BADCKSUM); |
---|
| 293 | } else { |
---|
| 294 | roar_err_set(ROAR_ERROR_MSGSIZE); |
---|
| 295 | } |
---|
[3882] | 296 | return -1; |
---|
| 297 | } |
---|
| 298 | |
---|
[5295] | 299 | if ( (*data = roar_mm_malloc(mes->datalen)) == NULL ) { |
---|
[5608] | 300 | if ( _libroar_msgresyncer(vio, mes->datalen) == -1 ) { |
---|
| 301 | roar_err_set(ROAR_ERROR_BADCKSUM); |
---|
| 302 | } else { |
---|
| 303 | roar_err_set(ROAR_ERROR_NOMEM); |
---|
| 304 | } |
---|
[3882] | 305 | return -1; |
---|
| 306 | } |
---|
| 307 | |
---|
| 308 | if ( mes->datalen == 0 ) { |
---|
[4873] | 309 | roar_err_clear(); |
---|
[5146] | 310 | if ( mes->cmd == ROAR_CMD_ERROR && errorframe != NULL ) { |
---|
| 311 | roar_err_init(errorframe); |
---|
| 312 | } |
---|
[3882] | 313 | return 0; |
---|
| 314 | } |
---|
| 315 | |
---|
[5270] | 316 | if ( roar_vio_read(vio, *data, mes->datalen) == (ssize_t)mes->datalen ) { |
---|
[5146] | 317 | ROAR_DBG("roar_vrecv_message2(*): Got data!"); |
---|
| 318 | |
---|
[4873] | 319 | roar_err_clear(); |
---|
[5146] | 320 | if ( mes->cmd == ROAR_CMD_ERROR && errorframe != NULL ) { |
---|
[5216] | 321 | if ( roar_err_parsemsg(mes, *data, errorframe) != 0 ) { |
---|
[5146] | 322 | roar_err_init(errorframe); |
---|
| 323 | } |
---|
| 324 | } |
---|
| 325 | ROAR_DBG("roar_vrecv_message2(*) = 0"); |
---|
[3882] | 326 | return 0; |
---|
| 327 | } |
---|
| 328 | |
---|
[4951] | 329 | // error is still set (by roar_vio_read()). |
---|
[3882] | 330 | return -1; |
---|
| 331 | } |
---|
| 332 | |
---|
| 333 | // what happened here? |
---|
| 334 | return -1; |
---|
| 335 | } |
---|
| 336 | |
---|
| 337 | int roar_req (struct roar_connection * con, struct roar_message * mes, char ** data) { |
---|
[5146] | 338 | return roar_req2(con, mes, data, NULL); |
---|
| 339 | } |
---|
| 340 | |
---|
| 341 | int roar_req2 (struct roar_connection * con, struct roar_message * mes, char ** data, |
---|
| 342 | struct roar_error_frame * errorframe) { |
---|
[3882] | 343 | struct roar_vio_calls * vio; |
---|
| 344 | |
---|
| 345 | if ( (vio = roar_get_connection_vio2(con)) == NULL ) |
---|
| 346 | return -1; |
---|
| 347 | |
---|
[5465] | 348 | if ( mes->version == _ROAR_MESSAGE_VERSION ) |
---|
| 349 | mes->version = con->version; |
---|
| 350 | |
---|
[5467] | 351 | if ( mes->version == 2 ) { |
---|
| 352 | mes->seq = roar_message_genseq(con, -1); |
---|
| 353 | } |
---|
| 354 | |
---|
[5146] | 355 | return roar_vreq2(vio, mes, data, errorframe); |
---|
[3882] | 356 | } |
---|
| 357 | |
---|
| 358 | int roar_vreq (struct roar_vio_calls * vio, struct roar_message * mes, char ** data) { |
---|
[5146] | 359 | return roar_vreq2(vio, mes, data, NULL); |
---|
| 360 | } |
---|
| 361 | |
---|
| 362 | int roar_vreq2 (struct roar_vio_calls * vio, struct roar_message * mes, char ** data, |
---|
| 363 | struct roar_error_frame * errorframe) { |
---|
[5030] | 364 | if ( roar_vsend_message(vio, mes, data != NULL ? *data : NULL) != 0 ) |
---|
[3882] | 365 | return -1; |
---|
| 366 | |
---|
[4439] | 367 | if ( data != NULL ) |
---|
[5295] | 368 | roar_mm_free(*data); |
---|
[3882] | 369 | |
---|
| 370 | roar_vio_sync(vio); // we need to do this becasue of ssl/compressed links |
---|
| 371 | |
---|
[5146] | 372 | return roar_vrecv_message2(vio, mes, data, errorframe); |
---|
[3882] | 373 | } |
---|
| 374 | |
---|
| 375 | //ll |
---|