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Diffstat (limited to 'libavformat/avio.c')
-rw-r--r--libavformat/avio.c338
1 files changed, 308 insertions, 30 deletions
diff --git a/libavformat/avio.c b/libavformat/avio.c
index a9a399af93..69b6eaac83 100644
--- a/libavformat/avio.c
+++ b/libavformat/avio.c
@@ -2,20 +2,20 @@
* unbuffered I/O
* Copyright (c) 2001 Fabrice Bellard
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -23,6 +23,7 @@
#include "libavutil/dict.h"
#include "libavutil/opt.h"
#include "libavutil/time.h"
+#include "libavutil/avassert.h"
#include "os_support.h"
#include "avformat.h"
#if CONFIG_NETWORK
@@ -49,7 +50,14 @@ static void *urlcontext_child_next(void *obj, void *prev)
return NULL;
}
-static const AVOption options[] = { { NULL } };
+#define OFFSET(x) offsetof(URLContext,x)
+#define E AV_OPT_FLAG_ENCODING_PARAM
+#define D AV_OPT_FLAG_DECODING_PARAM
+static const AVOption options[] = {
+ {"protocol_whitelist", "List of protocols that are allowed to be used", OFFSET(protocol_whitelist), AV_OPT_TYPE_STRING, { .str = NULL }, CHAR_MIN, CHAR_MAX, D },
+ { NULL }
+};
+
const AVClass ffurl_context_class = {
.class_name = "URLContext",
.item_name = urlcontext_to_name,
@@ -71,6 +79,16 @@ static int url_alloc_for_protocol(URLContext **puc, const URLProtocol *up,
if (up->flags & URL_PROTOCOL_FLAG_NETWORK && !ff_network_init())
return AVERROR(EIO);
#endif
+ if ((flags & AVIO_FLAG_READ) && !up->url_read) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Impossible to open the '%s' protocol for reading\n", up->name);
+ return AVERROR(EIO);
+ }
+ if ((flags & AVIO_FLAG_WRITE) && !up->url_write) {
+ av_log(NULL, AV_LOG_ERROR,
+ "Impossible to open the '%s' protocol for writing\n", up->name);
+ return AVERROR(EIO);
+ }
uc = av_mallocz(sizeof(URLContext) + strlen(filename) + 1);
if (!uc) {
err = AVERROR(ENOMEM);
@@ -90,8 +108,40 @@ static int url_alloc_for_protocol(URLContext **puc, const URLProtocol *up,
goto fail;
}
if (up->priv_data_class) {
+ int proto_len= strlen(up->name);
+ char *start = strchr(uc->filename, ',');
*(const AVClass **)uc->priv_data = up->priv_data_class;
av_opt_set_defaults(uc->priv_data);
+ if(!strncmp(up->name, uc->filename, proto_len) && uc->filename + proto_len == start){
+ int ret= 0;
+ char *p= start;
+ char sep= *++p;
+ char *key, *val;
+ p++;
+
+ if (strcmp(up->name, "subfile"))
+ ret = AVERROR(EINVAL);
+
+ while(ret >= 0 && (key= strchr(p, sep)) && p<key && (val = strchr(key+1, sep))){
+ *val= *key= 0;
+ if (strcmp(p, "start") && strcmp(p, "end")) {
+ ret = AVERROR_OPTION_NOT_FOUND;
+ } else
+ ret= av_opt_set(uc->priv_data, p, key+1, 0);
+ if (ret == AVERROR_OPTION_NOT_FOUND)
+ av_log(uc, AV_LOG_ERROR, "Key '%s' not found.\n", p);
+ *val= *key= sep;
+ p= val+1;
+ }
+ if(ret<0 || p!=key){
+ av_log(uc, AV_LOG_ERROR, "Error parsing options string %s\n", start);
+ av_freep(&uc->priv_data);
+ av_freep(&uc);
+ err = AVERROR(EINVAL);
+ goto fail;
+ }
+ memmove(start, key+1, strlen(key));
+ }
}
}
if (int_cb)
@@ -113,12 +163,43 @@ fail:
int ffurl_connect(URLContext *uc, AVDictionary **options)
{
- int err =
+ int err;
+ AVDictionary *tmp_opts = NULL;
+ AVDictionaryEntry *e;
+
+ if (!options)
+ options = &tmp_opts;
+
+ // Check that URLContext was initialized correctly and lists are matching if set
+ av_assert0(!(e=av_dict_get(*options, "protocol_whitelist", NULL, 0)) ||
+ (uc->protocol_whitelist && !strcmp(uc->protocol_whitelist, e->value)));
+
+ if (uc->protocol_whitelist && av_match_list(uc->prot->name, uc->protocol_whitelist, ',') <= 0) {
+ av_log(uc, AV_LOG_ERROR, "Protocol not on whitelist \'%s\'!\n", uc->protocol_whitelist);
+ return AVERROR(EINVAL);
+ }
+
+ if (!uc->protocol_whitelist && uc->prot->default_whitelist) {
+ av_log(uc, AV_LOG_DEBUG, "Setting default whitelist '%s'\n", uc->prot->default_whitelist);
+ uc->protocol_whitelist = av_strdup(uc->prot->default_whitelist);
+ if (!uc->protocol_whitelist) {
+ return AVERROR(ENOMEM);
+ }
+ } else if (!uc->protocol_whitelist)
+ av_log(uc, AV_LOG_DEBUG, "No default whitelist set\n"); // This should be an error once all declare a default whitelist
+
+ if ((err = av_dict_set(options, "protocol_whitelist", uc->protocol_whitelist, 0)) < 0)
+ return err;
+
+ err =
uc->prot->url_open2 ? uc->prot->url_open2(uc,
uc->filename,
uc->flags,
options) :
uc->prot->url_open(uc, uc->filename, uc->flags);
+
+ av_dict_set(options, "protocol_whitelist", NULL, 0);
+
if (err)
return err;
uc->is_connected = 1;
@@ -130,56 +211,111 @@ int ffurl_connect(URLContext *uc, AVDictionary **options)
return 0;
}
+int ffurl_accept(URLContext *s, URLContext **c)
+{
+ av_assert0(!*c);
+ if (s->prot->url_accept)
+ return s->prot->url_accept(s, c);
+ return AVERROR(EBADF);
+}
+
+int ffurl_handshake(URLContext *c)
+{
+ int ret;
+ if (c->prot->url_handshake) {
+ ret = c->prot->url_handshake(c);
+ if (ret)
+ return ret;
+ }
+ c->is_connected = 1;
+ return 0;
+}
+
#define URL_SCHEME_CHARS \
"abcdefghijklmnopqrstuvwxyz" \
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
"0123456789+-."
-int ffurl_alloc(URLContext **puc, const char *filename, int flags,
- const AVIOInterruptCB *int_cb)
+static const struct URLProtocol *url_find_protocol(const char *filename)
{
+ const URLProtocol *up;
const URLProtocol **protocols;
char proto_str[128], proto_nested[128], *ptr;
size_t proto_len = strspn(filename, URL_SCHEME_CHARS);
int i;
- if (filename[proto_len] != ':' || is_dos_path(filename))
+ if (filename[proto_len] != ':' &&
+ (strncmp(filename, "subfile,", 8) || !strchr(filename + proto_len + 1, ':')) ||
+ is_dos_path(filename))
strcpy(proto_str, "file");
else
av_strlcpy(proto_str, filename,
FFMIN(proto_len + 1, sizeof(proto_str)));
+ if ((ptr = strchr(proto_str, ',')))
+ *ptr = '\0';
av_strlcpy(proto_nested, proto_str, sizeof(proto_nested));
if ((ptr = strchr(proto_nested, '+')))
*ptr = '\0';
protocols = ffurl_get_protocols(NULL, NULL);
for (i = 0; protocols[i]; i++) {
- const URLProtocol *up = protocols[i];
- if (!strcmp(proto_str, up->name)) {
- av_freep(&protocols);
- return url_alloc_for_protocol(puc, up, filename, flags, int_cb);
- }
+ up = protocols[i];
+ if (!strcmp(proto_str, up->name))
+ break;
if (up->flags & URL_PROTOCOL_FLAG_NESTED_SCHEME &&
- !strcmp(proto_nested, up->name)) {
- av_freep(&protocols);
- return url_alloc_for_protocol(puc, up, filename, flags, int_cb);
- }
+ !strcmp(proto_nested, up->name))
+ break;
}
+ av_freep(&protocols);
+
+ return up;
+}
+
+int ffurl_alloc(URLContext **puc, const char *filename, int flags,
+ const AVIOInterruptCB *int_cb)
+{
+ const URLProtocol *p = NULL;
+
+ p = url_find_protocol(filename);
+ if (p)
+ return url_alloc_for_protocol(puc, p, filename, flags, int_cb);
+
*puc = NULL;
+ if (av_strstart(filename, "https:", NULL))
+ av_log(NULL, AV_LOG_WARNING, "https protocol not found, recompile FFmpeg with "
+ "openssl, gnutls,\n"
+ "or securetransport enabled.\n");
return AVERROR_PROTOCOL_NOT_FOUND;
}
-int ffurl_open(URLContext **puc, const char *filename, int flags,
- const AVIOInterruptCB *int_cb, AVDictionary **options)
+int ffurl_open_whitelist(URLContext **puc, const char *filename, int flags,
+ const AVIOInterruptCB *int_cb, AVDictionary **options, const char *whitelist)
{
+ AVDictionary *tmp_opts = NULL;
+ AVDictionaryEntry *e;
int ret = ffurl_alloc(puc, filename, flags, int_cb);
- if (ret)
+ if (ret < 0)
return ret;
if (options && (*puc)->prot->priv_data_class &&
(ret = av_opt_set_dict((*puc)->priv_data, options)) < 0)
goto fail;
+
+ if (!options)
+ options = &tmp_opts;
+
+ av_assert0(!whitelist ||
+ !(e=av_dict_get(*options, "protocol_whitelist", NULL, 0)) ||
+ !strcmp(whitelist, e->value));
+
+ if ((ret = av_dict_set(options, "protocol_whitelist", whitelist, 0)) < 0)
+ goto fail;
+
+ if ((ret = av_opt_set_dict(*puc, options)) < 0)
+ goto fail;
+
ret = ffurl_connect(*puc, options);
+
if (!ret)
return 0;
fail:
@@ -188,6 +324,13 @@ fail:
return ret;
}
+int ffurl_open(URLContext **puc, const char *filename, int flags,
+ const AVIOInterruptCB *int_cb, AVDictionary **options)
+{
+ return ffurl_open_whitelist(puc, filename, flags,
+ int_cb, options, NULL);
+}
+
static inline int retry_transfer_wrapper(URLContext *h, uint8_t *buf,
int size, int size_min,
int (*transfer_func)(URLContext *h,
@@ -196,9 +339,12 @@ static inline int retry_transfer_wrapper(URLContext *h, uint8_t *buf,
{
int ret, len;
int fast_retries = 5;
+ int64_t wait_since = 0;
len = 0;
while (len < size_min) {
+ if (ff_check_interrupt(&h->interrupt_callback))
+ return AVERROR_EXIT;
ret = transfer_func(h, buf + len, size - len);
if (ret == AVERROR(EINTR))
continue;
@@ -206,17 +352,22 @@ static inline int retry_transfer_wrapper(URLContext *h, uint8_t *buf,
return ret;
if (ret == AVERROR(EAGAIN)) {
ret = 0;
- if (fast_retries)
+ if (fast_retries) {
fast_retries--;
- else
+ } else {
+ if (h->rw_timeout) {
+ if (!wait_since)
+ wait_since = av_gettime_relative();
+ else if (av_gettime_relative() > wait_since + h->rw_timeout)
+ return AVERROR(EIO);
+ }
av_usleep(1000);
+ }
} else if (ret < 1)
return (ret < 0 && ret != AVERROR_EOF) ? ret : len;
if (ret)
fast_retries = FFMAX(fast_retries, 2);
len += ret;
- if (ff_check_interrupt(&h->interrupt_callback))
- return AVERROR_EXIT;
}
return len;
}
@@ -243,7 +394,7 @@ int ffurl_write(URLContext *h, const unsigned char *buf, int size)
if (h->max_packet_size && size > h->max_packet_size)
return AVERROR(EIO);
- return retry_transfer_wrapper(h, buf, size, size,
+ return retry_transfer_wrapper(h, (unsigned char *)buf, size, size,
(int (*)(struct URLContext *, uint8_t *, int))
h->prot->url_write);
}
@@ -258,8 +409,9 @@ int64_t ffurl_seek(URLContext *h, int64_t pos, int whence)
return ret;
}
-int ffurl_close(URLContext *h)
+int ffurl_closep(URLContext **hh)
{
+ URLContext *h= *hh;
int ret = 0;
if (!h)
return 0; /* can happen when ffurl_open fails */
@@ -273,17 +425,31 @@ int ffurl_close(URLContext *h)
if (h->prot->priv_data_size) {
if (h->prot->priv_data_class)
av_opt_free(h->priv_data);
- av_free(h->priv_data);
+ av_freep(&h->priv_data);
}
- av_free(h);
+ av_opt_free(h);
+ av_freep(hh);
return ret;
}
+int ffurl_close(URLContext *h)
+{
+ return ffurl_closep(&h);
+}
+
+
+const char *avio_find_protocol_name(const char *url)
+{
+ const URLProtocol *p = url_find_protocol(url);
+
+ return p ? p->name : NULL;
+}
+
int avio_check(const char *url, int flags)
{
URLContext *h;
int ret = ffurl_alloc(&h, url, flags, NULL);
- if (ret)
+ if (ret < 0)
return ret;
if (h->prot->url_check) {
@@ -298,6 +464,118 @@ int avio_check(const char *url, int flags)
return ret;
}
+int avpriv_io_move(const char *url_src, const char *url_dst)
+{
+ URLContext *h_src, *h_dst;
+ int ret = ffurl_alloc(&h_src, url_src, AVIO_FLAG_READ_WRITE, NULL);
+ if (ret < 0)
+ return ret;
+ ret = ffurl_alloc(&h_dst, url_dst, AVIO_FLAG_WRITE, NULL);
+ if (ret < 0) {
+ ffurl_close(h_src);
+ return ret;
+ }
+
+ if (h_src->prot == h_dst->prot && h_src->prot->url_move)
+ ret = h_src->prot->url_move(h_src, h_dst);
+ else
+ ret = AVERROR(ENOSYS);
+
+ ffurl_close(h_src);
+ ffurl_close(h_dst);
+ return ret;
+}
+
+int avpriv_io_delete(const char *url)
+{
+ URLContext *h;
+ int ret = ffurl_alloc(&h, url, AVIO_FLAG_WRITE, NULL);
+ if (ret < 0)
+ return ret;
+
+ if (h->prot->url_delete)
+ ret = h->prot->url_delete(h);
+ else
+ ret = AVERROR(ENOSYS);
+
+ ffurl_close(h);
+ return ret;
+}
+
+int avio_open_dir(AVIODirContext **s, const char *url, AVDictionary **options)
+{
+ URLContext *h = NULL;
+ AVIODirContext *ctx = NULL;
+ int ret;
+ av_assert0(s);
+
+ ctx = av_mallocz(sizeof(*ctx));
+ if (!ctx) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ if ((ret = ffurl_alloc(&h, url, AVIO_FLAG_READ, NULL)) < 0)
+ goto fail;
+
+ if (h->prot->url_open_dir && h->prot->url_read_dir && h->prot->url_close_dir) {
+ if (options && h->prot->priv_data_class &&
+ (ret = av_opt_set_dict(h->priv_data, options)) < 0)
+ goto fail;
+ ret = h->prot->url_open_dir(h);
+ } else
+ ret = AVERROR(ENOSYS);
+ if (ret < 0)
+ goto fail;
+
+ h->is_connected = 1;
+ ctx->url_context = h;
+ *s = ctx;
+ return 0;
+
+ fail:
+ av_free(ctx);
+ *s = NULL;
+ ffurl_close(h);
+ return ret;
+}
+
+int avio_read_dir(AVIODirContext *s, AVIODirEntry **next)
+{
+ URLContext *h;
+ int ret;
+
+ if (!s || !s->url_context)
+ return AVERROR(EINVAL);
+ h = s->url_context;
+ if ((ret = h->prot->url_read_dir(h, next)) < 0)
+ avio_free_directory_entry(next);
+ return ret;
+}
+
+int avio_close_dir(AVIODirContext **s)
+{
+ URLContext *h;
+
+ av_assert0(s);
+ if (!(*s) || !(*s)->url_context)
+ return AVERROR(EINVAL);
+ h = (*s)->url_context;
+ h->prot->url_close_dir(h);
+ ffurl_close(h);
+ av_freep(s);
+ *s = NULL;
+ return 0;
+}
+
+void avio_free_directory_entry(AVIODirEntry **entry)
+{
+ if (!entry || !*entry)
+ return;
+ av_free((*entry)->name);
+ av_freep(entry);
+}
+
int64_t ffurl_size(URLContext *h)
{
int64_t pos, size;
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-10 00:28:24 +0000