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4349 | Serge | 1 | /* |
2 | * Unix socket protocol |
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3 | * Copyright (c) 2013 Luca Barbato |
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4 | * |
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5 | * This file is part of FFmpeg. |
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6 | * |
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7 | * FFmpeg is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU Lesser General Public |
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9 | * License as published by the Free Software Foundation; either |
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10 | * version 2.1 of the License, or (at your option) any later version. |
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11 | * |
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12 | * FFmpeg is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 | * Lesser General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU Lesser General Public |
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18 | * License along with FFmpeg; if not, write to the Free Software |
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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20 | */ |
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21 | |||
22 | /** |
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23 | * @file |
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24 | * |
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25 | * Unix socket url_protocol |
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26 | * |
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27 | */ |
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28 | |||
29 | #include "libavutil/avstring.h" |
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30 | #include "libavutil/opt.h" |
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31 | #include "os_support.h" |
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32 | #include "network.h" |
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33 | #include |
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34 | #include "url.h" |
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35 | |||
36 | typedef struct UnixContext { |
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37 | const AVClass *class; |
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38 | struct sockaddr_un addr; |
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39 | int timeout; |
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40 | int listen; |
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41 | int type; |
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42 | int fd; |
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43 | } UnixContext; |
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44 | |||
45 | #define OFFSET(x) offsetof(UnixContext, x) |
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46 | #define ED AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_ENCODING_PARAM |
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47 | static const AVOption unix_options[] = { |
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48 | { "listen", "Open socket for listening", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ED }, |
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49 | { "timeout", "Timeout in ms", OFFSET(timeout), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, ED }, |
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50 | { "type", "Socket type", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = SOCK_STREAM }, INT_MIN, INT_MAX, ED, "type" }, |
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51 | { "stream", "Stream (reliable stream-oriented)", 0, AV_OPT_TYPE_CONST, { .i64 = SOCK_STREAM }, INT_MIN, INT_MAX, ED, "type" }, |
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52 | { "datagram", "Datagram (unreliable packet-oriented)", 0, AV_OPT_TYPE_CONST, { .i64 = SOCK_DGRAM }, INT_MIN, INT_MAX, ED, "type" }, |
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53 | { "seqpacket", "Seqpacket (reliable packet-oriented", 0, AV_OPT_TYPE_CONST, { .i64 = SOCK_SEQPACKET }, INT_MIN, INT_MAX, ED, "type" }, |
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54 | { NULL } |
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55 | }; |
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56 | |||
57 | static const AVClass unix_class = { |
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58 | .class_name = "unix", |
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59 | .item_name = av_default_item_name, |
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60 | .option = unix_options, |
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61 | .version = LIBAVUTIL_VERSION_INT, |
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62 | }; |
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63 | |||
64 | static int unix_open(URLContext *h, const char *filename, int flags) |
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65 | { |
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66 | UnixContext *s = h->priv_data; |
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67 | int fd, ret; |
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68 | |||
69 | av_strstart(filename, "unix:", &filename); |
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70 | s->addr.sun_family = AF_UNIX; |
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71 | av_strlcpy(s->addr.sun_path, filename, sizeof(s->addr.sun_path)); |
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72 | |||
73 | if ((fd = ff_socket(AF_UNIX, s->type, 0)) < 0) |
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74 | return ff_neterrno(); |
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75 | |||
76 | if (s->listen) { |
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77 | fd = ff_listen_bind(fd, (struct sockaddr *)&s->addr, |
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78 | sizeof(s->addr), s->timeout, h); |
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79 | if (fd < 0) { |
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80 | ret = fd; |
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81 | goto fail; |
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82 | } |
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83 | } else { |
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84 | ret = ff_listen_connect(fd, (struct sockaddr *)&s->addr, |
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85 | sizeof(s->addr), s->timeout, h, 0); |
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86 | if (ret < 0) |
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87 | goto fail; |
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88 | } |
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89 | |||
90 | s->fd = fd; |
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91 | |||
92 | return 0; |
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93 | |||
94 | fail: |
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95 | if (s->listen && AVUNERROR(ret) != EADDRINUSE) |
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96 | unlink(s->addr.sun_path); |
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97 | if (fd >= 0) |
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98 | closesocket(fd); |
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99 | return ret; |
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100 | } |
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101 | |||
102 | static int unix_read(URLContext *h, uint8_t *buf, int size) |
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103 | { |
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104 | UnixContext *s = h->priv_data; |
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105 | int ret; |
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106 | |||
107 | if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
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108 | ret = ff_network_wait_fd(s->fd, 0); |
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109 | if (ret < 0) |
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110 | return ret; |
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111 | } |
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112 | ret = recv(s->fd, buf, size, 0); |
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113 | return ret < 0 ? ff_neterrno() : ret; |
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114 | } |
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115 | |||
116 | static int unix_write(URLContext *h, const uint8_t *buf, int size) |
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117 | { |
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118 | UnixContext *s = h->priv_data; |
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119 | int ret; |
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120 | |||
121 | if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
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122 | ret = ff_network_wait_fd(s->fd, 1); |
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123 | if (ret < 0) |
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124 | return ret; |
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125 | } |
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126 | ret = send(s->fd, buf, size, 0); |
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127 | return ret < 0 ? ff_neterrno() : ret; |
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128 | } |
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129 | |||
130 | static int unix_close(URLContext *h) |
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131 | { |
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132 | UnixContext *s = h->priv_data; |
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133 | if (s->listen) |
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134 | unlink(s->addr.sun_path); |
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135 | closesocket(s->fd); |
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136 | return 0; |
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137 | } |
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138 | |||
139 | static int unix_get_file_handle(URLContext *h) |
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140 | { |
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141 | UnixContext *s = h->priv_data; |
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142 | return s->fd; |
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143 | } |
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144 | |||
145 | URLProtocol ff_unix_protocol = { |
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146 | .name = "unix", |
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147 | .url_open = unix_open, |
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148 | .url_read = unix_read, |
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149 | .url_write = unix_write, |
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150 | .url_close = unix_close, |
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151 | .url_get_file_handle = unix_get_file_handle, |
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152 | .priv_data_size = sizeof(UnixContext), |
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153 | .priv_data_class = &unix_class, |
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154 | .flags = URL_PROTOCOL_FLAG_NETWORK, |
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155 | };>>>>>>> |