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s_server: Do not use SSL_sendfile when KTLS is not being used

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Fix a bug in `openssl s_server -WWW` where it would attempt to invoke
`SSL_sendfile` if `-ktls -sendfile` was passed on the command line, even
if KTLS has not actually been enabled, for example because it is not
supported by the host. Since `SSL_sendfile` is only supported when KTLS
is actually being used, this resulted in a failure to serve requests.

Fixes #17503.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17788)
This commit is contained in:
Hugo Landau 2022-03-01 16:47:03 +00:00 committed by Matt Caswell
parent c1b364cee3
commit aea68b0ddb
1 changed files with 8 additions and 1 deletions
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9
apps/s_server.c
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@ -3010,6 +3010,9 @@ static int www_body(int s, int stype, int prot, unsigned char *context)
int total_bytes = 0;
#endif
int width;
#ifndef OPENSSL_NO_KTLS
int use_sendfile_for_req = use_sendfile;
#endif
fd_set readfds;
const char *opmode;
#ifdef CHARSET_EBCDIC
@ -3340,7 +3343,11 @@ static int www_body(int s, int stype, int prot, unsigned char *context)
}
/* send the file */
#ifndef OPENSSL_NO_KTLS
if (use_sendfile) {
if (use_sendfile_for_req && !BIO_get_ktls_send(SSL_get_wbio(con))) {
BIO_printf(bio_err, "Warning: sendfile requested but KTLS is not available\n");
use_sendfile_for_req = 0;
}
if (use_sendfile_for_req) {
FILE *fp = NULL;
int fd;
struct stat st;