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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6147 | 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 | ret = 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 (ret < 0) |
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| 80 | goto fail; |
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| 81 | fd = ret; |
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| 82 | } else { |
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| 83 | ret = ff_listen_connect(fd, (struct sockaddr *)&s->addr, |
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| 84 | sizeof(s->addr), s->timeout, h, 0); |
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| 85 | if (ret < 0) |
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| 86 | goto fail; |
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| 87 | } |
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| 88 | |||
| 89 | s->fd = fd; |
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| 90 | |||
| 91 | return 0; |
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| 92 | |||
| 93 | fail: |
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| 94 | if (s->listen && AVUNERROR(ret) != EADDRINUSE) |
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| 95 | unlink(s->addr.sun_path); |
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| 96 | if (fd >= 0) |
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| 97 | closesocket(fd); |
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| 98 | return ret; |
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| 99 | } |
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| 100 | |||
| 101 | static int unix_read(URLContext *h, uint8_t *buf, int size) |
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| 102 | { |
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| 103 | UnixContext *s = h->priv_data; |
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| 104 | int ret; |
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| 105 | |||
| 106 | if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
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| 107 | ret = ff_network_wait_fd(s->fd, 0); |
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| 108 | if (ret < 0) |
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| 109 | return ret; |
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| 110 | } |
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| 111 | ret = recv(s->fd, buf, size, 0); |
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| 112 | return ret < 0 ? ff_neterrno() : ret; |
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| 113 | } |
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| 114 | |||
| 115 | static int unix_write(URLContext *h, const uint8_t *buf, int size) |
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| 116 | { |
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| 117 | UnixContext *s = h->priv_data; |
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| 118 | int ret; |
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| 119 | |||
| 120 | if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
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| 121 | ret = ff_network_wait_fd(s->fd, 1); |
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| 122 | if (ret < 0) |
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| 123 | return ret; |
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| 124 | } |
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| 125 | ret = send(s->fd, buf, size, MSG_NOSIGNAL); |
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| 126 | return ret < 0 ? ff_neterrno() : ret; |
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| 127 | } |
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| 128 | |||
| 129 | static int unix_close(URLContext *h) |
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| 130 | { |
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| 131 | UnixContext *s = h->priv_data; |
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| 132 | if (s->listen) |
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| 133 | unlink(s->addr.sun_path); |
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| 134 | closesocket(s->fd); |
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| 135 | return 0; |
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| 136 | } |
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| 137 | |||
| 138 | static int unix_get_file_handle(URLContext *h) |
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| 139 | { |
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| 140 | UnixContext *s = h->priv_data; |
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| 141 | return s->fd; |
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| 142 | } |
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| 143 | |||
| 144 | URLProtocol ff_unix_protocol = { |
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| 145 | .name = "unix", |
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| 146 | .url_open = unix_open, |
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| 147 | .url_read = unix_read, |
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| 148 | .url_write = unix_write, |
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| 149 | .url_close = unix_close, |
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| 150 | .url_get_file_handle = unix_get_file_handle, |
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| 151 | .priv_data_size = sizeof(UnixContext), |
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| 152 | .priv_data_class = &unix_class, |
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| 153 | .flags = URL_PROTOCOL_FLAG_NETWORK, |
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| 154 | }; |