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block/curl: Check protocol prefix

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If the user has explicitly specified a block driver and thus a protocol,
we have to make sure the URL's protocol prefix matches. Otherwise the
latter will silently override the former which might catch some users by
surprise.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20170331120431.1767-3-mreitz@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
This commit is contained in:
Max Reitz 2017-03-31 14:04:31 +02:00 committed by Jeff Cody
parent 6b9d62db89
commit 34634ca286
1 changed files with 10 additions and 0 deletions
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10
block/curl.c
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@ -659,6 +659,7 @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags,
const char *cookie;
double d;
const char *secretid;
const char *protocol_delimiter;
static int inited = 0;
@ -700,6 +701,15 @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags,
goto out_noclean;
}
if (!strstart(file, bs->drv->protocol_name, &protocol_delimiter) ||
!strstart(protocol_delimiter, "://", NULL))
{
error_setg(errp, "%s curl driver cannot handle the URL '%s' (does not "
"start with '%s://')", bs->drv->protocol_name, file,
bs->drv->protocol_name);
goto out_noclean;
}
s->username = g_strdup(qemu_opt_get(opts, CURL_BLOCK_OPT_USERNAME));
secretid = qemu_opt_get(opts, CURL_BLOCK_OPT_PASSWORD_SECRET);