[4824] | 1 | //vio_misc.c: |
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| 2 | |
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| 3 | /* |
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[5961] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2011-2014 |
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[4824] | 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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| 38 | static ssize_t roar_vio_misc_read (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 39 | struct roar_vio_misc * self = vio->inst; |
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| 40 | |
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| 41 | if ( self->read == NULL ) |
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| 42 | return -1; |
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| 43 | |
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| 44 | return self->read(buf, count, vio, self); |
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| 45 | } |
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| 46 | |
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| 47 | static ssize_t roar_vio_misc_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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| 48 | struct roar_vio_misc * self = vio->inst; |
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| 49 | |
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| 50 | if ( self->write == NULL ) |
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| 51 | return -1; |
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| 52 | |
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| 53 | return self->write(buf, count, vio, self); |
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| 54 | } |
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| 55 | |
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[5278] | 56 | static roar_off_t roar_vio_misc_lseek (struct roar_vio_calls * vio, roar_off_t offset, int whence) { |
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[5270] | 57 | (void)vio, (void)offset, (void)whence; |
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[4824] | 58 | return 0; |
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| 59 | } |
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| 60 | |
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| 61 | static int roar_vio_misc_sync (struct roar_vio_calls * vio) { |
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[5270] | 62 | (void)vio; |
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[4824] | 63 | return 0; |
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| 64 | } |
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| 65 | |
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[5278] | 66 | static int roar_vio_misc_ctl (struct roar_vio_calls * vio, roar_vio_ctl_t cmd, void * data) { |
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[5413] | 67 | struct roar_vio_misc * self; |
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[4826] | 68 | |
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| 69 | if ( vio == NULL || cmd == -1 ) |
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| 70 | return -1; |
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| 71 | |
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[5413] | 72 | self = vio->inst; |
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| 73 | |
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[4826] | 74 | switch (cmd) { |
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| 75 | case ROAR_VIO_CTL_GET_NAME: |
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| 76 | if ( data == NULL ) |
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| 77 | return -1; |
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| 78 | |
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| 79 | *(const char**)data = self->name; |
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| 80 | return 0; |
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| 81 | break; |
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| 82 | case ROAR_VIO_CTL_SET_NOSYNC: |
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| 83 | vio->sync = NULL; |
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| 84 | return 0; |
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| 85 | break; |
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[5276] | 86 | case ROAR_VIO_CTL_NONBLOCK: |
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| 87 | if ( self->support_nonblocking ) |
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| 88 | return 0; |
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| 89 | |
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| 90 | if ( *(int*)data == ROAR_SOCKET_BLOCK ) |
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| 91 | return 0; |
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| 92 | |
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| 93 | return -1; |
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| 94 | break; |
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[4826] | 95 | } |
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| 96 | |
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[4824] | 97 | return -1; |
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| 98 | } |
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| 99 | |
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| 100 | static int roar_vio_misc_close (struct roar_vio_calls * vio) { |
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[5270] | 101 | (void)vio; |
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[4824] | 102 | return 0; |
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| 103 | } |
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| 104 | |
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| 105 | int roar_vio_open_misc (struct roar_vio_calls * calls, const struct roar_vio_misc * callbacks) { |
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| 106 | if ( calls == NULL || callbacks == NULL ) |
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| 107 | return -1; |
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| 108 | |
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| 109 | memset(calls, 0, sizeof(struct roar_vio_calls)); |
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[5388] | 110 | calls->flags = ROAR_VIO_FLAGS_NONE; |
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| 111 | calls->refc = 1; |
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[4824] | 112 | calls->read = roar_vio_misc_read; |
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| 113 | calls->write = roar_vio_misc_write; |
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| 114 | calls->lseek = roar_vio_misc_lseek; |
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| 115 | calls->sync = roar_vio_misc_sync; |
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| 116 | calls->ctl = roar_vio_misc_ctl; |
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| 117 | calls->close = roar_vio_misc_close; |
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| 118 | calls->inst = (void*)callbacks; |
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| 119 | |
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| 120 | return 0; |
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| 121 | } |
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| 122 | |
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| 123 | static ssize_t roar_vio_misc_op_return_len (void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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[5270] | 124 | (void)buf, (void)vio, (void)callbacks; |
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[4824] | 125 | return len; |
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| 126 | } |
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| 127 | |
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| 128 | static ssize_t roar_vio_misc_op_return_zero(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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[5270] | 129 | (void)buf, (void)len, (void)vio, (void)callbacks; |
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[4824] | 130 | return 0; |
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| 131 | } |
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| 132 | |
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| 133 | static ssize_t roar_vio_misc_op_zero(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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[5270] | 134 | (void)vio, (void)callbacks; |
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[4824] | 135 | memset(buf, 0, len); |
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| 136 | return len; |
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| 137 | } |
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| 138 | |
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[4876] | 139 | static ssize_t roar_vio_misc_op_full(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) |
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| 140 | { |
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[5270] | 141 | (void)buf, (void)len, (void)vio, (void)callbacks; |
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[4876] | 142 | roar_err_set(ROAR_ERROR_NOSPC); |
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| 143 | return -1; |
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| 144 | } |
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| 145 | |
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[4824] | 146 | static ssize_t roar_vio_misc_op_random_nonce(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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[5270] | 147 | (void)vio, (void)callbacks; |
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| 148 | |
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[4824] | 149 | if ( roar_random_gen_nonce(buf, len) == -1 ) |
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| 150 | return -1; |
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| 151 | |
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| 152 | return len; |
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| 153 | } |
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| 154 | |
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| 155 | static ssize_t roar_vio_misc_op_random_salt_nonce(void * buf, size_t len, struct roar_vio_calls * vio, struct roar_vio_misc * callbacks) { |
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[5270] | 156 | (void)vio, (void)callbacks; |
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| 157 | |
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[4824] | 158 | if ( roar_random_salt_nonce(buf, len) == -1 ) |
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| 159 | return -1; |
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| 160 | |
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| 161 | return len; |
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| 162 | } |
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| 163 | |
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| 164 | static const struct roar_vio_misc libroar_vio_miscs[] = { |
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| 165 | {.name = "null", .support_nonblocking = 1, .read = roar_vio_misc_op_return_zero, .write = roar_vio_misc_op_return_len}, |
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[4876] | 166 | {.name = "full", .support_nonblocking = 1, .read = roar_vio_misc_op_return_zero, .write = roar_vio_misc_op_full}, |
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[4824] | 167 | {.name = "zero", .support_nonblocking = 1, .read = roar_vio_misc_op_zero, .write = roar_vio_misc_op_return_len}, |
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| 168 | {.name = "nrandom", .support_nonblocking = 1, |
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| 169 | .read = roar_vio_misc_op_random_nonce, .write = roar_vio_misc_op_random_salt_nonce} |
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| 170 | }; |
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| 171 | |
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| 172 | int roar_vio_open_misc_by_name(struct roar_vio_calls * calls, const char * name) { |
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| 173 | size_t i; |
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| 174 | |
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| 175 | if ( calls == NULL || name == NULL ) |
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| 176 | return -1; |
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| 177 | |
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| 178 | for (i = 0; i < (sizeof(libroar_vio_miscs)/sizeof(*libroar_vio_miscs)); i++) |
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| 179 | if ( !strcasecmp(name, libroar_vio_miscs[i].name) ) |
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| 180 | return roar_vio_open_misc(calls, &(libroar_vio_miscs[i])); |
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| 181 | |
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| 182 | return -1; |
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| 183 | } |
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| 184 | |
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| 185 | //ll |
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