| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Gopher protocol | ||
| 3 | * | ||
| 4 | * Copyright (c) 2009 Toshimitsu Kimura | ||
| 5 | * Copyright (c) 2021 parazyd <parazyd@dyne.org> | ||
| 6 | * | ||
| 7 | * based on libavformat/http.c, Copyright (c) 2000, 2001 Fabrice Bellard | ||
| 8 | * | ||
| 9 | * This file is part of FFmpeg. | ||
| 10 | * | ||
| 11 | * FFmpeg is free software; you can redistribute it and/or | ||
| 12 | * modify it under the terms of the GNU Lesser General Public | ||
| 13 | * License as published by the Free Software Foundation; either | ||
| 14 | * version 2.1 of the License, or (at your option) any later version. | ||
| 15 | * | ||
| 16 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 19 | * Lesser General Public License for more details. | ||
| 20 | * | ||
| 21 | * You should have received a copy of the GNU Lesser General Public | ||
| 22 | * License along with FFmpeg; if not, write to the Free Software | ||
| 23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 24 | */ | ||
| 25 | |||
| 26 | #include "config.h" | ||
| 27 | #include "config_components.h" | ||
| 28 | |||
| 29 | #include "libavutil/avstring.h" | ||
| 30 | #include "avformat.h" | ||
| 31 | #include "internal.h" | ||
| 32 | #include "network.h" | ||
| 33 | #include "url.h" | ||
| 34 | |||
| 35 | typedef struct GopherContext { | ||
| 36 | URLContext *hd; | ||
| 37 | } GopherContext; | ||
| 38 | |||
| 39 | ✗ | static int gopher_write(URLContext *h, const uint8_t *buf, int size) | |
| 40 | { | ||
| 41 | ✗ | GopherContext *s = h->priv_data; | |
| 42 | ✗ | return ffurl_write(s->hd, buf, size); | |
| 43 | } | ||
| 44 | |||
| 45 | ✗ | static int gopher_connect(URLContext *h, const char *path) | |
| 46 | { | ||
| 47 | char buffer[1024]; | ||
| 48 | |||
| 49 | ✗ | if (!*path) return AVERROR(EINVAL); | |
| 50 | ✗ | switch (*++path) { | |
| 51 | ✗ | case ';': | |
| 52 | case '<': | ||
| 53 | case '5': | ||
| 54 | case '9': | ||
| 55 | case 's': | ||
| 56 | ✗ | path = strchr(path, '/'); | |
| 57 | ✗ | if (!path) return AVERROR(EINVAL); | |
| 58 | ✗ | break; | |
| 59 | ✗ | default: | |
| 60 | ✗ | av_log(h, AV_LOG_WARNING, | |
| 61 | "Gopher protocol type '%c' not supported yet!\n", | ||
| 62 | ✗ | *path); | |
| 63 | ✗ | return AVERROR(EINVAL); | |
| 64 | } | ||
| 65 | |||
| 66 | ✗ | if (strpbrk(path, "\r\n")) { | |
| 67 | ✗ | av_log(h, AV_LOG_ERROR, "Gopher path contains CRLF characters\n"); | |
| 68 | ✗ | return AVERROR(EINVAL); | |
| 69 | } | ||
| 70 | |||
| 71 | /* send gopher sector */ | ||
| 72 | ✗ | snprintf(buffer, sizeof(buffer), "%s\r\n", path); | |
| 73 | |||
| 74 | ✗ | if (gopher_write(h, buffer, strlen(buffer)) < 0) | |
| 75 | ✗ | return AVERROR(EIO); | |
| 76 | |||
| 77 | ✗ | return 0; | |
| 78 | } | ||
| 79 | |||
| 80 | ✗ | static int gopher_close(URLContext *h) | |
| 81 | { | ||
| 82 | ✗ | GopherContext *s = h->priv_data; | |
| 83 | ✗ | ffurl_closep(&s->hd); | |
| 84 | ✗ | return 0; | |
| 85 | } | ||
| 86 | |||
| 87 | ✗ | static int gopher_open(URLContext *h, const char *uri, int flags) | |
| 88 | { | ||
| 89 | ✗ | GopherContext *s = h->priv_data; | |
| 90 | char proto[10], hostname[1024], auth[1024], path[1024], buf[1024]; | ||
| 91 | int port, err; | ||
| 92 | ✗ | const char *lower_proto = "tcp"; | |
| 93 | |||
| 94 | ✗ | h->is_streamed = 1; | |
| 95 | |||
| 96 | /* needed in any case to build the host string */ | ||
| 97 | ✗ | av_url_split(proto, sizeof(proto), auth, sizeof(auth), | |
| 98 | hostname, sizeof(hostname), &port, path, sizeof(path), uri); | ||
| 99 | |||
| 100 | ✗ | if (port < 0) | |
| 101 | ✗ | port = 70; | |
| 102 | |||
| 103 | ✗ | if (!strcmp(proto, "gophers")) | |
| 104 | ✗ | lower_proto = "tls"; | |
| 105 | |||
| 106 | ✗ | ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL); | |
| 107 | |||
| 108 | ✗ | s->hd = NULL; | |
| 109 | ✗ | err = ffurl_open_whitelist(&s->hd, buf, AVIO_FLAG_READ_WRITE, | |
| 110 | ✗ | &h->interrupt_callback, NULL, h->protocol_whitelist, h->protocol_blacklist, h); | |
| 111 | ✗ | if (err < 0) | |
| 112 | ✗ | goto fail; | |
| 113 | |||
| 114 | ✗ | if ((err = gopher_connect(h, path)) < 0) | |
| 115 | ✗ | goto fail; | |
| 116 | ✗ | return 0; | |
| 117 | ✗ | fail: | |
| 118 | ✗ | gopher_close(h); | |
| 119 | ✗ | return err; | |
| 120 | } | ||
| 121 | |||
| 122 | ✗ | static int gopher_read(URLContext *h, uint8_t *buf, int size) | |
| 123 | { | ||
| 124 | ✗ | GopherContext *s = h->priv_data; | |
| 125 | ✗ | int len = ffurl_read(s->hd, buf, size); | |
| 126 | ✗ | return len; | |
| 127 | } | ||
| 128 | |||
| 129 | #if CONFIG_GOPHER_PROTOCOL | ||
| 130 | const URLProtocol ff_gopher_protocol = { | ||
| 131 | .name = "gopher", | ||
| 132 | .url_open = gopher_open, | ||
| 133 | .url_read = gopher_read, | ||
| 134 | .url_write = gopher_write, | ||
| 135 | .url_close = gopher_close, | ||
| 136 | .priv_data_size = sizeof(GopherContext), | ||
| 137 | .flags = URL_PROTOCOL_FLAG_NETWORK, | ||
| 138 | .default_whitelist = "gopher,tcp" | ||
| 139 | }; | ||
| 140 | #endif /* CONFIG_GOPHER_PROTOCOL */ | ||
| 141 | |||
| 142 | #if CONFIG_GOPHERS_PROTOCOL | ||
| 143 | const URLProtocol ff_gophers_protocol = { | ||
| 144 | .name = "gophers", | ||
| 145 | .url_open = gopher_open, | ||
| 146 | .url_read = gopher_read, | ||
| 147 | .url_write = gopher_write, | ||
| 148 | .url_close = gopher_close, | ||
| 149 | .priv_data_size = sizeof(GopherContext), | ||
| 150 | .flags = URL_PROTOCOL_FLAG_NETWORK, | ||
| 151 | .default_whitelist = "gopher,gophers,tcp,tls" | ||
| 152 | }; | ||
| 153 | #endif /* CONFIG_GOPHERS_PROTOCOL */ | ||
| 154 |