51367267c8
This commit adds a "gophers" handler to the gopher protocol. gophers is a community-adopted protocol that acts the same way like normal gopher with the added TLS encapsulation. The gophers protocol is supported by gopher servers like geomydae(8), and clients like curl(1), clic(1), and hurl(1). This commit also adds compilation guards to both gopher and gophers, since now there are two protocols in the file it makes sense to have this addition. Signed-off-by: parazyd <parazyd@dyne.org> Signed-off-by: Marton Balint <cus@passwd.hu>
145 lines
4.0 KiB
C
145 lines
4.0 KiB
C
/*
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* Gopher protocol
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*
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* Copyright (c) 2009 Toshimitsu Kimura
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* Copyright (c) 2021 parazyd <parazyd@dyne.org>
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*
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* based on libavformat/http.c, Copyright (c) 2000, 2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "libavutil/avstring.h"
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#include "avformat.h"
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#include "internal.h"
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#include "network.h"
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#include "url.h"
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typedef struct GopherContext {
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URLContext *hd;
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} GopherContext;
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static int gopher_write(URLContext *h, const uint8_t *buf, int size)
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{
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GopherContext *s = h->priv_data;
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return ffurl_write(s->hd, buf, size);
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}
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static int gopher_connect(URLContext *h, const char *path)
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{
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char buffer[1024];
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if (!*path) return AVERROR(EINVAL);
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switch (*++path) {
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case '5':
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case '9':
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path = strchr(path, '/');
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if (!path) return AVERROR(EINVAL);
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break;
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default:
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av_log(h, AV_LOG_WARNING,
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"Gopher protocol type '%c' not supported yet!\n",
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*path);
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return AVERROR(EINVAL);
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}
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/* send gopher sector */
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snprintf(buffer, sizeof(buffer), "%s\r\n", path);
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if (gopher_write(h, buffer, strlen(buffer)) < 0)
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return AVERROR(EIO);
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return 0;
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}
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static int gopher_close(URLContext *h)
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{
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GopherContext *s = h->priv_data;
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ffurl_closep(&s->hd);
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return 0;
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}
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static int gopher_open(URLContext *h, const char *uri, int flags)
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{
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GopherContext *s = h->priv_data;
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char proto[10], hostname[1024], auth[1024], path[1024], buf[1024];
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int port, err;
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const char *lower_proto = "tcp";
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h->is_streamed = 1;
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/* needed in any case to build the host string */
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av_url_split(proto, sizeof(proto), auth, sizeof(auth),
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hostname, sizeof(hostname), &port, path, sizeof(path), uri);
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if (port < 0)
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port = 70;
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if (!strcmp(proto, "gophers"))
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lower_proto = "tls";
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ff_url_join(buf, sizeof(buf), lower_proto, NULL, hostname, port, NULL);
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s->hd = NULL;
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err = ffurl_open_whitelist(&s->hd, buf, AVIO_FLAG_READ_WRITE,
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&h->interrupt_callback, NULL, h->protocol_whitelist, h->protocol_blacklist, h);
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if (err < 0)
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goto fail;
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if ((err = gopher_connect(h, path)) < 0)
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goto fail;
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return 0;
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fail:
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gopher_close(h);
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return err;
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}
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static int gopher_read(URLContext *h, uint8_t *buf, int size)
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{
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GopherContext *s = h->priv_data;
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int len = ffurl_read(s->hd, buf, size);
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return len;
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}
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#if CONFIG_GOPHER_PROTOCOL
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const URLProtocol ff_gopher_protocol = {
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.name = "gopher",
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.url_open = gopher_open,
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.url_read = gopher_read,
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.url_write = gopher_write,
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.url_close = gopher_close,
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.priv_data_size = sizeof(GopherContext),
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.flags = URL_PROTOCOL_FLAG_NETWORK,
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.default_whitelist = "gopher,tcp"
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};
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#endif /* CONFIG_GOPHER_PROTOCOL */
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#if CONFIG_GOPHERS_PROTOCOL
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const URLProtocol ff_gophers_protocol = {
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.name = "gophers",
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.url_open = gopher_open,
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.url_read = gopher_read,
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.url_write = gopher_write,
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.url_close = gopher_close,
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.priv_data_size = sizeof(GopherContext),
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.flags = URL_PROTOCOL_FLAG_NETWORK,
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.default_whitelist = "gopher,gophers,tcp,tls"
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};
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#endif /* CONFIG_GOPHERS_PROTOCOL */
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