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tls_openssl: Improve quality of printed error messages, pass IO error codes through 

Print every error in the stack, if more than one, and don't print
bogus errors if there's none logged within OpenSSL.

Retain the underlying IO error code, print an error message out of
it, and pass the error code on to the caller.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2021-03-26 15:39:53 +02:00
parent eac77f7cf0
commit 84ad471fce
1 changed files with 29 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
libavformat/tls_openssl.c
View File

@ -46,6 +46,7 @@ typedef struct TLSContext {
#if OPENSSL_VERSION_NUMBER >= 0x1010000fL
BIO_METHOD* url_bio_method;
#endif
int io_err;
} TLSContext;
#if HAVE_THREADS && OPENSSL_VERSION_NUMBER < 0x10100000L
@ -124,13 +125,25 @@ void ff_openssl_deinit(void)
static int print_tls_error(URLContext *h, int ret)
{
TLSContext *c = h->priv_data;
int printed = 0, e, averr = AVERROR(EIO);
if (h->flags & AVIO_FLAG_NONBLOCK) {
int err = SSL_get_error(c->ssl, ret);
if (err == SSL_ERROR_WANT_READ || err == SSL_ERROR_WANT_WRITE)
return AVERROR(EAGAIN);
}
av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL));
return AVERROR(EIO);
while ((e = ERR_get_error()) != 0) {
av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(e, NULL));
printed = 1;
}
if (c->io_err) {
av_log(h, AV_LOG_ERROR, "IO error: %s\n", av_err2str(c->io_err));
printed = 1;
averr = c->io_err;
c->io_err = 0;
}
if (!printed)
av_log(h, AV_LOG_ERROR, "Unknown error\n");
return averr;
}
static int tls_close(URLContext *h)
@ -178,29 +191,33 @@ static int url_bio_destroy(BIO *b)
static int url_bio_bread(BIO *b, char *buf, int len)
{
URLContext *h = GET_BIO_DATA(b);
int ret = ffurl_read(h, buf, len);
TLSContext *c = GET_BIO_DATA(b);
int ret = ffurl_read(c->tls_shared.tcp, buf, len);
if (ret >= 0)
return ret;
BIO_clear_retry_flags(b);
if (ret == AVERROR(EAGAIN))
BIO_set_retry_read(b);
if (ret == AVERROR_EXIT)
return 0;
if (ret == AVERROR(EAGAIN))
BIO_set_retry_read(b);
else
c->io_err = ret;
return -1;
}
static int url_bio_bwrite(BIO *b, const char *buf, int len)
{
URLContext *h = GET_BIO_DATA(b);
int ret = ffurl_write(h, buf, len);
TLSContext *c = GET_BIO_DATA(b);
int ret = ffurl_write(c->tls_shared.tcp, buf, len);
if (ret >= 0)
return ret;
BIO_clear_retry_flags(b);
if (ret == AVERROR(EAGAIN))
BIO_set_retry_write(b);
if (ret == AVERROR_EXIT)
return 0;
if (ret == AVERROR(EAGAIN))
BIO_set_retry_write(b);
else
c->io_err = ret;
return -1;
}
@ -291,10 +308,10 @@ static int tls_open(URLContext *h, const char *uri, int flags, AVDictionary **op
BIO_meth_set_create(p->url_bio_method, url_bio_create);
BIO_meth_set_destroy(p->url_bio_method, url_bio_destroy);
bio = BIO_new(p->url_bio_method);
BIO_set_data(bio, c->tcp);
BIO_set_data(bio, p);
#else
bio = BIO_new(&url_bio_method);
bio->ptr = c->tcp;
bio->ptr = p;
#endif
SSL_set_bio(p->ssl, bio, bio);
if (!c->listen && !c->numerichost)