On Wed, Dec 01, 2021 at 03:55:37PM +0200, Martin Storsjö wrote:
> On Wed, 1 Dec 2021, lance.lmw...@gmail.com wrote:
>
> > From: Limin Wang <lance.lmw...@gmail.com>
> >
> > Signed-off-by: Limin Wang <lance.lmw...@gmail.com>
> > ---
> > libavformat/rtsp.c | 30 ++++++++++++++++++++----------
> > 1 file changed, 20 insertions(+), 10 deletions(-)
> >
> > diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
> > index e6a4993..ec8be8b 100644
> > --- a/libavformat/rtsp.c
> > +++ b/libavformat/rtsp.c
> > @@ -2369,11 +2369,29 @@ static void append_source_addrs(char *buf, int
> > size, const char *name,
> > av_strlcatf(buf, size, ",%s", addrs[i]->addr);
> > }
> >
> > +static char *read_sdp_str(AVIOContext *pb, int size)
> > +{
> > + int n;
> > + char *str;
> > +
> > + if (size < 0 || size == INT_MAX)
> > + return NULL;
> > +
> > + str = av_malloc(size + 1);
> > + if (!str)
> > + return NULL;
> > + n = avio_get_str(pb, size, str, size + 1);
> > + if (n < size)
> > + avio_skip(pb, size - n);
>
> What? Why do you want to skip past data in the input? Size here is just a
> random static upper limit of how large an SDP file would be.
yes, my fault, don't need to run avio_skip(). For avio_get_str() will return
error only
buflen <=0, so str is valid anyway.
>
> This patch totally lacks a motivation of why you want to do this.
considering the SDP is strings in file, so I think it's better to use
avio_get_str().
Also, I'm considering to remove limit of SDP_MAX_SIZE after that.
>
> // Martin
>
--
Thanks,
Limin Wang
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