[3882] | 1 | //proto.c: |
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| 2 | |
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| 3 | /* |
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[5381] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2012 |
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[3882] | 5 | * |
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| 6 | * This file is part of libroar a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroar is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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| 23 | * |
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| 24 | * NOTE for everyone want's to change something and send patches: |
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| 25 | * read README and HACKING! There a addition information on |
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| 26 | * the license of this document you need to read before you send |
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| 27 | * any patches. |
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| 28 | * |
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| 29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 30 | * or libpulse*: |
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| 31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 32 | * and are therefore GPL. Because of this it may be illigal to use |
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| 33 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 34 | */ |
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| 35 | |
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| 36 | #include "libroar.h" |
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| 37 | |
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[3887] | 38 | #define _ROAR_MESS_BUF_LEN_V0 (1 /* version */ + 1 /* cmd */ + 2 /* stream */ + 4 /* pos */ + 2 /* datalen */) |
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| 39 | #define _ROAR_MESS_BUF_LEN_V1 (1 /* version */ + 1 /* cmd */ + 2 /* stream */ + 4 /* pos */ + 2 /* datalen */ + \ |
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| 40 | 1 /* flags */) |
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| 41 | #define _ROAR_MESS_BUF_LEN_V2 (1 /* version */ + 1 /* cmd */ + 2 /* stream */ + 8 /* pos */ + 2 /* datalen */ + \ |
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| 42 | 4 /* flags */ + 2 /* seq */) |
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| 43 | #define _ROAR_MESS_BUF_LEN _ROAR_MESS_BUF_LEN_V0 |
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| 44 | #define _ROAR_MESS_BUF_LEN_MAX ROAR_MAX3(_ROAR_MESS_BUF_LEN_V0, _ROAR_MESS_BUF_LEN_V1, _ROAR_MESS_BUF_LEN_V2) |
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| 45 | |
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| 46 | #define _ROAR_MESS_CRC_LEN_V0 0 /* No CRC */ |
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| 47 | #define _ROAR_MESS_CRC_LEN_V1 1 |
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| 48 | #define _ROAR_MESS_CRC_LEN_V2 4 |
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| 49 | #define _ROAR_MESS_CRC_LEN_MAX ROAR_MAX3(_ROAR_MESS_CRC_LEN_V0, _ROAR_MESS_CRC_LEN_V1, _ROAR_MESS_CRC_LEN_V2) |
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| 50 | |
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[3882] | 51 | int roar_send_message (struct roar_connection * con, struct roar_message * mes, char * data) { |
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| 52 | struct roar_vio_calls * vio; |
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| 53 | |
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| 54 | if ( (vio = roar_get_connection_vio2(con)) == NULL ) |
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| 55 | return -1; |
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| 56 | |
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| 57 | return roar_vsend_message(vio, mes, data); |
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| 58 | } |
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| 59 | |
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| 60 | int roar_vsend_message(struct roar_vio_calls * vio, struct roar_message * mes, char * data) { |
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[3887] | 61 | char buf[_ROAR_MESS_BUF_LEN_MAX]; |
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| 62 | char crc[_ROAR_MESS_CRC_LEN_MAX]; |
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| 63 | size_t headerlen = 0; |
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| 64 | size_t crclen = 0; |
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| 65 | char * bufptr; |
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[3882] | 66 | |
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[4873] | 67 | roar_err_set(ROAR_ERROR_UNKNOWN); |
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[3882] | 68 | |
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| 69 | ROAR_DBG("roar_send_message(*): try to send an request..."); |
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| 70 | |
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[3887] | 71 | headerlen = _ROAR_MESS_BUF_LEN; |
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| 72 | |
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| 73 | buf[0] = mes->version; // first byte is always the version. |
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[3882] | 74 | |
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[3887] | 75 | switch (mes->version) { |
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| 76 | case 0: |
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| 77 | buf[1] = (unsigned char) mes->cmd; |
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| 78 | *(uint16_t*)(buf+2) = ROAR_HOST2NET16(mes->stream); |
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| 79 | *(uint32_t*)(buf+4) = ROAR_HOST2NET32(mes->pos); |
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| 80 | *(uint16_t*)(buf+8) = ROAR_HOST2NET16(mes->datalen); |
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| 81 | headerlen = _ROAR_MESS_BUF_LEN_V0; |
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| 82 | break; |
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| 83 | case 1: |
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| 84 | buf[1] = (unsigned char) (mes->flags & 0xFF); |
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| 85 | buf[2] = (unsigned char) mes->cmd; |
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| 86 | // ... |
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[4951] | 87 | roar_err_set(ROAR_ERROR_NSVERSION); |
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[3887] | 88 | return -1; |
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| 89 | break; |
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| 90 | case 2: |
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| 91 | headerlen = 16; |
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| 92 | buf[1] = (unsigned char) mes->cmd; |
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| 93 | *(uint16_t*)(buf+2) = ROAR_HOST2NET16(mes->stream); |
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| 94 | *(uint32_t*)(buf+4) = ROAR_HOST2NET32(mes->flags); |
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| 95 | if ( mes->flags & ROAR_MF_LSPOS ) { |
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[5463] | 96 | *(uint64_t*)(buf+8) = ROAR_HOST2NET64(mes->pos64); |
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[3887] | 97 | bufptr = buf+16; |
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| 98 | headerlen += 4; |
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| 99 | } else { |
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[5463] | 100 | *(uint32_t*)(buf+8) = ROAR_HOST2NET32(mes->pos); |
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[3887] | 101 | bufptr = buf+12; |
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| 102 | } |
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| 103 | *(uint16_t*)(bufptr+0) = ROAR_HOST2NET16(mes->datalen); |
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| 104 | *(uint16_t*)(bufptr+2) = ROAR_HOST2NET16(mes->seq); |
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| 105 | break; |
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| 106 | default: |
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[4951] | 107 | roar_err_set(ROAR_ERROR_BADVERSION); |
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[3887] | 108 | return -1; |
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| 109 | } |
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| 110 | |
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[5270] | 111 | if ( roar_vio_write(vio, buf, headerlen) != (ssize_t)headerlen ) { |
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[3882] | 112 | return -1; |
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| 113 | } |
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| 114 | |
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| 115 | if ( mes->datalen != 0 ) { |
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[5270] | 116 | if ( roar_vio_write(vio, data == NULL ? mes->data : data, mes->datalen) != (ssize_t)mes->datalen ) { |
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[3882] | 117 | return -1; |
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| 118 | } |
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| 119 | } |
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| 120 | |
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[3887] | 121 | if ( crclen != 0 ) { |
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[5270] | 122 | if ( roar_vio_write(vio, crc, crclen) != (ssize_t)crclen ) { |
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[3887] | 123 | return -1; |
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| 124 | } |
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| 125 | } |
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| 126 | |
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[4873] | 127 | roar_err_clear(); |
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[3882] | 128 | |
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| 129 | ROAR_DBG("roar_send_message(*) = 0"); |
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| 130 | return 0; |
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| 131 | } |
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| 132 | |
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| 133 | int roar_recv_message (struct roar_connection * con, struct roar_message * mes, char ** data) { |
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[5146] | 134 | return roar_recv_message2(con, mes, data, NULL); |
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| 135 | } |
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| 136 | int roar_recv_message2 (struct roar_connection * con, struct roar_message * mes, char ** data, |
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| 137 | struct roar_error_frame * errorframe) { |
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[3882] | 138 | struct roar_vio_calls * vio; |
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| 139 | |
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| 140 | if ( (vio = roar_get_connection_vio2(con)) == NULL ) |
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| 141 | return -1; |
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| 142 | |
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[5146] | 143 | return roar_vrecv_message2(vio, mes, data, errorframe); |
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[3882] | 144 | } |
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| 145 | |
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| 146 | int roar_vrecv_message(struct roar_vio_calls * vio, struct roar_message * mes, char ** data) { |
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[5146] | 147 | return roar_vrecv_message2(vio, mes, data, NULL); |
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| 148 | } |
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| 149 | |
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| 150 | int roar_vrecv_message2(struct roar_vio_calls * vio, struct roar_message * mes, char ** data, |
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| 151 | struct roar_error_frame * errorframe) { |
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[3887] | 152 | // TODO: add CRC support. |
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| 153 | char buf[_ROAR_MESS_BUF_LEN_MAX]; |
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| 154 | // char crc[_ROAR_MESS_CRC_LEN_MAX]; |
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| 155 | size_t headerlen = 0; |
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| 156 | // size_t crclen = 0; |
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| 157 | size_t needlen; |
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| 158 | char * bufptr; |
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[3882] | 159 | |
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[4873] | 160 | roar_err_set(ROAR_ERROR_UNKNOWN); |
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[3882] | 161 | |
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[5146] | 162 | ROAR_DBG("roar_vrecv_message2(vio=%p, mes=%p, data=%p, errorframe=%p) = ?", vio, mes, data, errorframe); |
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| 163 | |
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| 164 | ROAR_DBG("roar_vrecv_message2(*): try to get a response form the server..."); |
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[3882] | 165 | |
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[5146] | 166 | if ( vio == NULL || mes == NULL ) { |
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| 167 | roar_err_set(ROAR_ERROR_FAULT); |
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[3882] | 168 | return -1; |
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[5146] | 169 | } |
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[3882] | 170 | |
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| 171 | if ( data != NULL ) |
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| 172 | *data = NULL; |
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| 173 | |
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| 174 | memset(mes, 0, sizeof(struct roar_message)); |
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| 175 | |
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[3887] | 176 | if ( roar_vio_read(vio, buf, _ROAR_MESS_BUF_LEN_V0) != _ROAR_MESS_BUF_LEN_V0 ) { |
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[4873] | 177 | roar_err_set(ROAR_ERROR_PROTO); |
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[3882] | 178 | return -1; |
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| 179 | } |
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| 180 | |
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[5146] | 181 | ROAR_DBG("roar_vrecv_message2(*): Got a header"); |
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[3882] | 182 | |
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[3887] | 183 | mes->version = buf[0]; |
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| 184 | headerlen = _ROAR_MESS_BUF_LEN_V0; |
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| 185 | |
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| 186 | switch (mes->version) { |
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| 187 | case 0: |
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| 188 | // we already have all data, so create the struct |
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| 189 | mes->cmd = (unsigned char)buf[1]; |
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| 190 | mes->stream = ROAR_NET2HOST16(*(uint16_t*)(buf+2)); |
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| 191 | mes->pos = ROAR_NET2HOST32(*(uint32_t*)(buf+4)); |
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[5463] | 192 | mes->pos64 = mes->pos; |
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[3887] | 193 | mes->datalen = ROAR_NET2HOST16(*(uint16_t*)(buf+8)); |
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| 194 | break; |
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| 195 | case 2: |
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| 196 | mes->cmd = (unsigned char)buf[1]; |
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| 197 | mes->stream = ROAR_NET2HOST16(*(uint16_t*)(buf+2)); |
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| 198 | mes->flags = ROAR_NET2HOST32(*(uint32_t*)(buf+4)); |
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| 199 | if ( mes->flags & ROAR_MF_LSPOS ) { |
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| 200 | headerlen = 20; |
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| 201 | } else { |
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| 202 | headerlen = 16; |
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| 203 | } |
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| 204 | break; |
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| 205 | default: |
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[4951] | 206 | roar_err_set(ROAR_ERROR_NSVERSION); |
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[3887] | 207 | return -1; |
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| 208 | break; |
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[3882] | 209 | } |
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| 210 | |
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[3887] | 211 | // check specal case where headerlen < _ROAR_MESS_BUF_LEN_V0, this means that we need to put |
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| 212 | // some data we read as header into the data part of the message. |
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| 213 | if ( headerlen > _ROAR_MESS_BUF_LEN_V0 ) { |
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| 214 | needlen = headerlen - _ROAR_MESS_BUF_LEN_V0; |
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| 215 | if ( roar_vio_read(vio, buf+_ROAR_MESS_BUF_LEN_V0, needlen) != (ssize_t)needlen ) { |
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[4873] | 216 | roar_err_set(ROAR_ERROR_PROTO); |
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[3887] | 217 | return -1; |
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| 218 | } |
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| 219 | } |
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| 220 | |
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| 221 | switch (mes->version) { |
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| 222 | case 2: |
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| 223 | if ( mes->flags & ROAR_MF_LSPOS ) { |
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| 224 | mes->pos64 = ROAR_NET2HOST32(*(uint64_t*)(buf+8)); |
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[5463] | 225 | mes->pos = mes->pos64 & (uint64_t)0x0FFFFFFFFLLU; |
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[3887] | 226 | bufptr = buf+16; |
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| 227 | } else { |
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| 228 | mes->pos = ROAR_NET2HOST32(*(uint32_t*)(buf+8)); |
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[5463] | 229 | mes->pos64 = mes->pos; |
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[3887] | 230 | bufptr = buf+12; |
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| 231 | } |
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| 232 | mes->datalen = ROAR_NET2HOST16(*(uint16_t*)(bufptr+0)); |
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[5467] | 233 | mes->seq = ROAR_NET2HOST16(*(uint16_t*)(bufptr+2)); |
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[3887] | 234 | break; |
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| 235 | } |
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[3882] | 236 | |
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| 237 | if ( (int16_t)mes->stream == -1 ) |
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| 238 | mes->stream = -1; |
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| 239 | |
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[5146] | 240 | ROAR_DBG("roar_vrecv_message2(*): command=%i(%s)", mes->cmd, |
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[3882] | 241 | mes->cmd == ROAR_CMD_OK ? "OK" : (mes->cmd == ROAR_CMD_ERROR ? "ERROR" : "UNKNOWN")); |
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| 242 | |
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[3887] | 243 | // Below we only have data handling, handling of header is finished: |
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| 244 | |
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[3882] | 245 | if ( mes->datalen == 0 ) { |
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[5146] | 246 | ROAR_DBG("roar_vrecv_message2(*): no data in this pkg"); |
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| 247 | if ( mes->cmd == ROAR_CMD_ERROR && errorframe != NULL ) { |
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| 248 | roar_err_init(errorframe); |
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| 249 | } |
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[4873] | 250 | roar_err_clear(); |
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[5146] | 251 | ROAR_DBG("roar_vrecv_message2(*) = 0"); |
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[3882] | 252 | return 0; |
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| 253 | } |
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| 254 | |
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| 255 | if ( mes->datalen <= LIBROAR_BUFFER_MSGDATA ) { |
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[5270] | 256 | if ( roar_vio_read(vio, mes->data, mes->datalen) == (ssize_t)mes->datalen ) { |
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[5146] | 257 | ROAR_DBG("roar_vrecv_message2(*): Got data!"); |
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[4873] | 258 | roar_err_clear(); |
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[5146] | 259 | if ( mes->cmd == ROAR_CMD_ERROR && errorframe != NULL ) { |
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[5216] | 260 | if ( roar_err_parsemsg(mes, *data, errorframe) != 0 ) { |
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[5146] | 261 | roar_err_init(errorframe); |
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| 262 | } |
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| 263 | } |
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| 264 | ROAR_DBG("roar_vrecv_message2(*) = 0"); |
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[3882] | 265 | return 0; |
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| 266 | } |
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| 267 | |
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| 268 | return -1; |
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| 269 | } else { |
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| 270 | if ( data == NULL ) { |
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[4873] | 271 | roar_err_set(ROAR_ERROR_MSGSIZE); |
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[3882] | 272 | return -1; |
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| 273 | } |
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| 274 | |
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[5295] | 275 | if ( (*data = roar_mm_malloc(mes->datalen)) == NULL ) { |
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[4873] | 276 | roar_err_set(ROAR_ERROR_NOMEM); |
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[3882] | 277 | return -1; |
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| 278 | } |
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| 279 | |
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| 280 | if ( mes->datalen == 0 ) { |
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[4873] | 281 | roar_err_clear(); |
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[5146] | 282 | if ( mes->cmd == ROAR_CMD_ERROR && errorframe != NULL ) { |
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| 283 | roar_err_init(errorframe); |
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| 284 | } |
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[3882] | 285 | return 0; |
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| 286 | } |
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| 287 | |
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[5270] | 288 | if ( roar_vio_read(vio, *data, mes->datalen) == (ssize_t)mes->datalen ) { |
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[5146] | 289 | ROAR_DBG("roar_vrecv_message2(*): Got data!"); |
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| 290 | |
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[4873] | 291 | roar_err_clear(); |
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[5146] | 292 | if ( mes->cmd == ROAR_CMD_ERROR && errorframe != NULL ) { |
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[5216] | 293 | if ( roar_err_parsemsg(mes, *data, errorframe) != 0 ) { |
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[5146] | 294 | roar_err_init(errorframe); |
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| 295 | } |
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| 296 | } |
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| 297 | ROAR_DBG("roar_vrecv_message2(*) = 0"); |
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[3882] | 298 | return 0; |
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| 299 | } |
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| 300 | |
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[4951] | 301 | // error is still set (by roar_vio_read()). |
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[3882] | 302 | return -1; |
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| 303 | } |
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| 304 | |
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| 305 | // what happened here? |
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| 306 | return -1; |
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| 307 | } |
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| 308 | |
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| 309 | int roar_req (struct roar_connection * con, struct roar_message * mes, char ** data) { |
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[5146] | 310 | return roar_req2(con, mes, data, NULL); |
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| 311 | } |
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| 312 | |
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| 313 | int roar_req2 (struct roar_connection * con, struct roar_message * mes, char ** data, |
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| 314 | struct roar_error_frame * errorframe) { |
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[3882] | 315 | struct roar_vio_calls * vio; |
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| 316 | |
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| 317 | if ( (vio = roar_get_connection_vio2(con)) == NULL ) |
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| 318 | return -1; |
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| 319 | |
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[5465] | 320 | if ( mes->version == _ROAR_MESSAGE_VERSION ) |
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| 321 | mes->version = con->version; |
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| 322 | |
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[5467] | 323 | if ( mes->version == 2 ) { |
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| 324 | mes->seq = roar_message_genseq(con, -1); |
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| 325 | } |
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| 326 | |
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[5146] | 327 | return roar_vreq2(vio, mes, data, errorframe); |
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[3882] | 328 | } |
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| 329 | |
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| 330 | int roar_vreq (struct roar_vio_calls * vio, struct roar_message * mes, char ** data) { |
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[5146] | 331 | return roar_vreq2(vio, mes, data, NULL); |
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| 332 | } |
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| 333 | |
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| 334 | int roar_vreq2 (struct roar_vio_calls * vio, struct roar_message * mes, char ** data, |
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| 335 | struct roar_error_frame * errorframe) { |
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[5030] | 336 | if ( roar_vsend_message(vio, mes, data != NULL ? *data : NULL) != 0 ) |
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[3882] | 337 | return -1; |
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| 338 | |
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[4439] | 339 | if ( data != NULL ) |
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[5295] | 340 | roar_mm_free(*data); |
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[3882] | 341 | |
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| 342 | roar_vio_sync(vio); // we need to do this becasue of ssl/compressed links |
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| 343 | |
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[5146] | 344 | return roar_vrecv_message2(vio, mes, data, errorframe); |
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[3882] | 345 | } |
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| 346 | |
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| 347 | //ll |
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