[3882] | 1 | //proto.c: |
---|
| 2 | |
---|
| 3 | /* |
---|
[4708] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2011 |
---|
[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 | mes->version = _ROAR_MESSAGE_VERSION; |
---|
| 74 | |
---|
| 75 | buf[0] = mes->version; // first byte is always the version. |
---|
[3882] | 76 | |
---|
[3887] | 77 | switch (mes->version) { |
---|
| 78 | case 0: |
---|
| 79 | buf[1] = (unsigned char) mes->cmd; |
---|
| 80 | *(uint16_t*)(buf+2) = ROAR_HOST2NET16(mes->stream); |
---|
| 81 | *(uint32_t*)(buf+4) = ROAR_HOST2NET32(mes->pos); |
---|
| 82 | *(uint16_t*)(buf+8) = ROAR_HOST2NET16(mes->datalen); |
---|
| 83 | headerlen = _ROAR_MESS_BUF_LEN_V0; |
---|
| 84 | break; |
---|
| 85 | case 1: |
---|
| 86 | buf[1] = (unsigned char) (mes->flags & 0xFF); |
---|
| 87 | buf[2] = (unsigned char) mes->cmd; |
---|
| 88 | // ... |
---|
[4951] | 89 | roar_err_set(ROAR_ERROR_NSVERSION); |
---|
[3887] | 90 | return -1; |
---|
| 91 | break; |
---|
| 92 | case 2: |
---|
| 93 | headerlen = 16; |
---|
| 94 | buf[1] = (unsigned char) mes->cmd; |
---|
| 95 | *(uint16_t*)(buf+2) = ROAR_HOST2NET16(mes->stream); |
---|
| 96 | *(uint32_t*)(buf+4) = ROAR_HOST2NET32(mes->flags); |
---|
| 97 | if ( mes->flags & ROAR_MF_LSPOS ) { |
---|
| 98 | *(uint64_t*)(buf+8) = ROAR_HOST2NET16(mes->pos64); |
---|
| 99 | bufptr = buf+16; |
---|
| 100 | headerlen += 4; |
---|
| 101 | } else { |
---|
| 102 | *(uint32_t*)(buf+8) = ROAR_HOST2NET16(mes->pos); |
---|
| 103 | bufptr = buf+12; |
---|
| 104 | } |
---|
| 105 | *(uint16_t*)(bufptr+0) = ROAR_HOST2NET16(mes->datalen); |
---|
| 106 | *(uint16_t*)(bufptr+2) = ROAR_HOST2NET16(mes->seq); |
---|
| 107 | break; |
---|
| 108 | default: |
---|
[4951] | 109 | roar_err_set(ROAR_ERROR_BADVERSION); |
---|
[3887] | 110 | return -1; |
---|
| 111 | } |
---|
| 112 | |
---|
| 113 | if ( roar_vio_write(vio, buf, headerlen) != headerlen ) { |
---|
[3882] | 114 | return -1; |
---|
| 115 | } |
---|
| 116 | |
---|
| 117 | if ( mes->datalen != 0 ) { |
---|
| 118 | if ( roar_vio_write(vio, data == NULL ? mes->data : data, mes->datalen) != mes->datalen ) { |
---|
| 119 | return -1; |
---|
| 120 | } |
---|
| 121 | } |
---|
| 122 | |
---|
[3887] | 123 | if ( crclen != 0 ) { |
---|
| 124 | if ( roar_vio_write(vio, crc, crclen) != crclen ) { |
---|
| 125 | return -1; |
---|
| 126 | } |
---|
| 127 | } |
---|
| 128 | |
---|
[4873] | 129 | roar_err_clear(); |
---|
[3882] | 130 | |
---|
| 131 | ROAR_DBG("roar_send_message(*) = 0"); |
---|
| 132 | return 0; |
---|
| 133 | } |
---|
| 134 | |
---|
| 135 | int roar_recv_message (struct roar_connection * con, struct roar_message * mes, char ** data) { |
---|
[5146] | 136 | return roar_recv_message2(con, mes, data, NULL); |
---|
| 137 | } |
---|
| 138 | int roar_recv_message2 (struct roar_connection * con, struct roar_message * mes, char ** data, |
---|
| 139 | struct roar_error_frame * errorframe) { |
---|
[3882] | 140 | struct roar_vio_calls * vio; |
---|
| 141 | |
---|
| 142 | if ( (vio = roar_get_connection_vio2(con)) == NULL ) |
---|
| 143 | return -1; |
---|
| 144 | |
---|
[5146] | 145 | return roar_vrecv_message2(vio, mes, data, errorframe); |
---|
[3882] | 146 | } |
---|
| 147 | |
---|
| 148 | int roar_vrecv_message(struct roar_vio_calls * vio, struct roar_message * mes, char ** data) { |
---|
[5146] | 149 | return roar_vrecv_message2(vio, mes, data, NULL); |
---|
| 150 | } |
---|
| 151 | |
---|
| 152 | int roar_vrecv_message2(struct roar_vio_calls * vio, struct roar_message * mes, char ** data, |
---|
| 153 | struct roar_error_frame * errorframe) { |
---|
[3887] | 154 | // TODO: add CRC support. |
---|
| 155 | char buf[_ROAR_MESS_BUF_LEN_MAX]; |
---|
| 156 | // char crc[_ROAR_MESS_CRC_LEN_MAX]; |
---|
| 157 | size_t headerlen = 0; |
---|
| 158 | // size_t crclen = 0; |
---|
| 159 | size_t needlen; |
---|
| 160 | char * bufptr; |
---|
[3882] | 161 | |
---|
[4873] | 162 | roar_err_set(ROAR_ERROR_UNKNOWN); |
---|
[3882] | 163 | |
---|
[5146] | 164 | ROAR_DBG("roar_vrecv_message2(vio=%p, mes=%p, data=%p, errorframe=%p) = ?", vio, mes, data, errorframe); |
---|
| 165 | |
---|
| 166 | ROAR_DBG("roar_vrecv_message2(*): try to get a response form the server..."); |
---|
[3882] | 167 | |
---|
[5146] | 168 | if ( vio == NULL || mes == NULL ) { |
---|
| 169 | roar_err_set(ROAR_ERROR_FAULT); |
---|
[3882] | 170 | return -1; |
---|
[5146] | 171 | } |
---|
[3882] | 172 | |
---|
| 173 | if ( data != NULL ) |
---|
| 174 | *data = NULL; |
---|
| 175 | |
---|
| 176 | memset(mes, 0, sizeof(struct roar_message)); |
---|
| 177 | |
---|
[3887] | 178 | if ( roar_vio_read(vio, buf, _ROAR_MESS_BUF_LEN_V0) != _ROAR_MESS_BUF_LEN_V0 ) { |
---|
[4873] | 179 | roar_err_set(ROAR_ERROR_PROTO); |
---|
[3882] | 180 | return -1; |
---|
| 181 | } |
---|
| 182 | |
---|
[5146] | 183 | ROAR_DBG("roar_vrecv_message2(*): Got a header"); |
---|
[3882] | 184 | |
---|
[3887] | 185 | mes->version = buf[0]; |
---|
| 186 | headerlen = _ROAR_MESS_BUF_LEN_V0; |
---|
| 187 | |
---|
| 188 | switch (mes->version) { |
---|
| 189 | case 0: |
---|
| 190 | // we already have all data, so create the struct |
---|
| 191 | mes->cmd = (unsigned char)buf[1]; |
---|
| 192 | mes->stream = ROAR_NET2HOST16(*(uint16_t*)(buf+2)); |
---|
| 193 | mes->pos = ROAR_NET2HOST32(*(uint32_t*)(buf+4)); |
---|
| 194 | mes->datalen = ROAR_NET2HOST16(*(uint16_t*)(buf+8)); |
---|
| 195 | break; |
---|
| 196 | case 2: |
---|
| 197 | mes->cmd = (unsigned char)buf[1]; |
---|
| 198 | mes->stream = ROAR_NET2HOST16(*(uint16_t*)(buf+2)); |
---|
| 199 | mes->flags = ROAR_NET2HOST32(*(uint32_t*)(buf+4)); |
---|
| 200 | if ( mes->flags & ROAR_MF_LSPOS ) { |
---|
| 201 | headerlen = 20; |
---|
| 202 | } else { |
---|
| 203 | headerlen = 16; |
---|
| 204 | } |
---|
| 205 | break; |
---|
| 206 | default: |
---|
[4951] | 207 | roar_err_set(ROAR_ERROR_NSVERSION); |
---|
[3887] | 208 | return -1; |
---|
| 209 | break; |
---|
[3882] | 210 | } |
---|
| 211 | |
---|
[3887] | 212 | // check specal case where headerlen < _ROAR_MESS_BUF_LEN_V0, this means that we need to put |
---|
| 213 | // some data we read as header into the data part of the message. |
---|
| 214 | if ( headerlen > _ROAR_MESS_BUF_LEN_V0 ) { |
---|
| 215 | needlen = headerlen - _ROAR_MESS_BUF_LEN_V0; |
---|
| 216 | if ( roar_vio_read(vio, buf+_ROAR_MESS_BUF_LEN_V0, needlen) != (ssize_t)needlen ) { |
---|
[4873] | 217 | roar_err_set(ROAR_ERROR_PROTO); |
---|
[3887] | 218 | return -1; |
---|
| 219 | } |
---|
| 220 | } |
---|
| 221 | |
---|
| 222 | switch (mes->version) { |
---|
| 223 | case 2: |
---|
| 224 | if ( mes->flags & ROAR_MF_LSPOS ) { |
---|
| 225 | mes->pos64 = ROAR_NET2HOST32(*(uint64_t*)(buf+8)); |
---|
| 226 | bufptr = buf+16; |
---|
| 227 | } else { |
---|
| 228 | mes->pos = ROAR_NET2HOST32(*(uint32_t*)(buf+8)); |
---|
| 229 | bufptr = buf+12; |
---|
| 230 | } |
---|
| 231 | mes->datalen = ROAR_NET2HOST16(*(uint16_t*)(bufptr+0)); |
---|
| 232 | mes->seq = ROAR_NET2HOST16(*(uint16_t*)(bufptr+1)); |
---|
| 233 | break; |
---|
| 234 | } |
---|
[3882] | 235 | |
---|
| 236 | if ( (int16_t)mes->stream == -1 ) |
---|
| 237 | mes->stream = -1; |
---|
| 238 | |
---|
[5146] | 239 | ROAR_DBG("roar_vrecv_message2(*): command=%i(%s)", mes->cmd, |
---|
[3882] | 240 | mes->cmd == ROAR_CMD_OK ? "OK" : (mes->cmd == ROAR_CMD_ERROR ? "ERROR" : "UNKNOWN")); |
---|
| 241 | |
---|
[3887] | 242 | // Below we only have data handling, handling of header is finished: |
---|
| 243 | |
---|
[3882] | 244 | if ( mes->datalen == 0 ) { |
---|
[5146] | 245 | ROAR_DBG("roar_vrecv_message2(*): no data in this pkg"); |
---|
| 246 | if ( mes->cmd == ROAR_CMD_ERROR && errorframe != NULL ) { |
---|
| 247 | roar_err_init(errorframe); |
---|
| 248 | } |
---|
[4873] | 249 | roar_err_clear(); |
---|
[5146] | 250 | ROAR_DBG("roar_vrecv_message2(*) = 0"); |
---|
[3882] | 251 | return 0; |
---|
| 252 | } |
---|
| 253 | |
---|
| 254 | if ( mes->datalen <= LIBROAR_BUFFER_MSGDATA ) { |
---|
| 255 | if ( roar_vio_read(vio, mes->data, mes->datalen) == mes->datalen ) { |
---|
[5146] | 256 | ROAR_DBG("roar_vrecv_message2(*): Got data!"); |
---|
[4873] | 257 | roar_err_clear(); |
---|
[5146] | 258 | if ( mes->cmd == ROAR_CMD_ERROR && errorframe != NULL ) { |
---|
| 259 | if ( roar_err_parsemsg2(mes, *data, errorframe) != 0 ) { |
---|
| 260 | roar_err_init(errorframe); |
---|
| 261 | } |
---|
| 262 | } |
---|
| 263 | ROAR_DBG("roar_vrecv_message2(*) = 0"); |
---|
[3882] | 264 | return 0; |
---|
| 265 | } |
---|
| 266 | |
---|
| 267 | return -1; |
---|
| 268 | } else { |
---|
| 269 | if ( data == NULL ) { |
---|
[4873] | 270 | roar_err_set(ROAR_ERROR_MSGSIZE); |
---|
[3882] | 271 | return -1; |
---|
| 272 | } |
---|
| 273 | |
---|
| 274 | if ( (*data = malloc(mes->datalen)) == NULL ) { |
---|
[4873] | 275 | roar_err_set(ROAR_ERROR_NOMEM); |
---|
[3882] | 276 | return -1; |
---|
| 277 | } |
---|
| 278 | |
---|
| 279 | if ( mes->datalen == 0 ) { |
---|
[4873] | 280 | roar_err_clear(); |
---|
[5146] | 281 | if ( mes->cmd == ROAR_CMD_ERROR && errorframe != NULL ) { |
---|
| 282 | roar_err_init(errorframe); |
---|
| 283 | } |
---|
[3882] | 284 | return 0; |
---|
| 285 | } |
---|
| 286 | |
---|
| 287 | if ( roar_vio_read(vio, *data, mes->datalen) == mes->datalen ) { |
---|
[5146] | 288 | ROAR_DBG("roar_vrecv_message2(*): Got data!"); |
---|
| 289 | |
---|
[4873] | 290 | roar_err_clear(); |
---|
[5146] | 291 | if ( mes->cmd == ROAR_CMD_ERROR && errorframe != NULL ) { |
---|
| 292 | if ( roar_err_parsemsg2(mes, *data, errorframe) != 0 ) { |
---|
| 293 | roar_err_init(errorframe); |
---|
| 294 | } |
---|
| 295 | } |
---|
| 296 | ROAR_DBG("roar_vrecv_message2(*) = 0"); |
---|
[3882] | 297 | return 0; |
---|
| 298 | } |
---|
| 299 | |
---|
[4951] | 300 | // error is still set (by roar_vio_read()). |
---|
[3882] | 301 | return -1; |
---|
| 302 | } |
---|
| 303 | |
---|
| 304 | // what happened here? |
---|
| 305 | return -1; |
---|
| 306 | } |
---|
| 307 | |
---|
| 308 | int roar_req (struct roar_connection * con, struct roar_message * mes, char ** data) { |
---|
[5146] | 309 | return roar_req2(con, mes, data, NULL); |
---|
| 310 | } |
---|
| 311 | |
---|
| 312 | int roar_req2 (struct roar_connection * con, struct roar_message * mes, char ** data, |
---|
| 313 | struct roar_error_frame * errorframe) { |
---|
[3882] | 314 | struct roar_vio_calls * vio; |
---|
| 315 | |
---|
| 316 | if ( (vio = roar_get_connection_vio2(con)) == NULL ) |
---|
| 317 | return -1; |
---|
| 318 | |
---|
[5146] | 319 | return roar_vreq2(vio, mes, data, errorframe); |
---|
[3882] | 320 | } |
---|
| 321 | |
---|
| 322 | int roar_vreq (struct roar_vio_calls * vio, struct roar_message * mes, char ** data) { |
---|
[5146] | 323 | return roar_vreq2(vio, mes, data, NULL); |
---|
| 324 | } |
---|
| 325 | |
---|
| 326 | int roar_vreq2 (struct roar_vio_calls * vio, struct roar_message * mes, char ** data, |
---|
| 327 | struct roar_error_frame * errorframe) { |
---|
[5030] | 328 | if ( roar_vsend_message(vio, mes, data != NULL ? *data : NULL) != 0 ) |
---|
[3882] | 329 | return -1; |
---|
| 330 | |
---|
[4439] | 331 | if ( data != NULL ) |
---|
[3882] | 332 | free(*data); |
---|
| 333 | |
---|
| 334 | roar_vio_sync(vio); // we need to do this becasue of ssl/compressed links |
---|
| 335 | |
---|
[5146] | 336 | return roar_vrecv_message2(vio, mes, data, errorframe); |
---|
[3882] | 337 | } |
---|
| 338 | |
---|
| 339 | //ll |
---|