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avformat/udp: properly check for valid ttl in url 

Zhao Zhili added a ttl upper bound in commit 9daac85da8,
but the check for ttl in url is missing still.

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
This commit is contained in:
Limin Wang 2022-02-07 18:22:02 +08:00
parent 1ca19cf371
commit 1de24ee512
1 changed files with 5 additions and 0 deletions
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5
libavformat/udp.c
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@ -674,6 +674,11 @@ static int udp_open(URLContext *h, const char *uri, int flags)
}
if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
s->ttl = strtol(buf, NULL, 10);
if (s->ttl < 0 || s->ttl > 255) {
av_log(h, AV_LOG_ERROR, "ttl(%d) should be in range [0,255]\n", s->ttl);
ret = AVERROR(EINVAL);
goto fail;
}
}
if (av_find_info_tag(buf, sizeof(buf), "udplite_coverage", p)) {
s->udplite_coverage = strtol(buf, NULL, 10);