X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=ssl%2Frecord%2Frec_layer_d1.c;h=43e1f9895319ca28cd68167855c876ab069906bb;hp=37a2eb145ec4775a02e9772e3a5cef9e94519210;hb=66fab92316c913c781b2a274900d9d1e6a206ed0;hpb=0d8da77908df1aa3186b00113aab1b338cba9b07

diff --git a/ssl/record/rec_layer_d1.c b/ssl/record/rec_layer_d1.c
index 37a2eb145e..43e1f98953 100644
--- a/ssl/record/rec_layer_d1.c
+++ b/ssl/record/rec_layer_d1.c
@@ -363,8 +363,7 @@ int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
         return -1;
     }
 
-    if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s))
-    {
+    if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) {
         /* type == SSL3_RT_APPLICATION_DATA */
         i = s->handshake_func(s);
         /* SSLfatal() already called if appropriate */
@@ -473,6 +472,7 @@ int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
             return -1;
         }
         SSL3_RECORD_set_length(rr, 0);
+        SSL3_RECORD_set_read(rr);
         goto start;
     }
 
@@ -482,6 +482,7 @@ int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
      */
     if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
         SSL3_RECORD_set_length(rr, 0);
+        SSL3_RECORD_set_read(rr);
         s->rwstate = SSL_NOTHING;
         return 0;
     }
@@ -508,8 +509,16 @@ int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
         if (recvd_type != NULL)
             *recvd_type = SSL3_RECORD_get_type(rr);
 
-        if (len == 0)
+        if (len == 0) {
+            /*
+             * Mark a zero length record as read. This ensures multiple calls to
+             * SSL_read() with a zero length buffer will eventually cause
+             * SSL_pending() to report data as being available.
+             */
+            if (SSL3_RECORD_get_length(rr) == 0)
+                SSL3_RECORD_set_read(rr);
             return 0;
+        }
 
         if (len > SSL3_RECORD_get_length(rr))
             n = SSL3_RECORD_get_length(rr);
@@ -517,12 +526,16 @@ int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
             n = len;
 
         memcpy(buf, &(SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)]), n);
-        if (!peek) {
+        if (peek) {
+            if (SSL3_RECORD_get_length(rr) == 0)
+                SSL3_RECORD_set_read(rr);
+        } else {
             SSL3_RECORD_sub_length(rr, n);
             SSL3_RECORD_add_off(rr, n);
             if (SSL3_RECORD_get_length(rr) == 0) {
                 s->rlayer.rstate = SSL_ST_READ_HEADER;
                 SSL3_RECORD_set_off(rr, 0);
+                SSL3_RECORD_set_read(rr);
             }
         }
 #ifndef OPENSSL_NO_SCTP
@@ -578,6 +591,7 @@ int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
 
         if (alert_level == SSL3_AL_WARNING) {
             s->s3->warn_alert = alert_descr;
+            SSL3_RECORD_set_read(rr);
 
             s->rlayer.alert_count++;
             if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) {
@@ -615,6 +629,7 @@ int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
             BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr);
             ERR_add_error_data(2, "SSL alert number ", tmp);
             s->shutdown |= SSL_RECEIVED_SHUTDOWN;
+            SSL3_RECORD_set_read(rr);
             SSL_CTX_remove_session(s->session_ctx, s->session);
             return 0;
         } else {
@@ -630,6 +645,7 @@ int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
                                             * shutdown */
         s->rwstate = SSL_NOTHING;
         SSL3_RECORD_set_length(rr, 0);
+        SSL3_RECORD_set_read(rr);
         return 0;
     }
 
@@ -639,6 +655,7 @@ int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
          * are still missing, so just drop it.
          */
         SSL3_RECORD_set_length(rr, 0);
+        SSL3_RECORD_set_read(rr);
         goto start;
     }
 
@@ -656,6 +673,7 @@ int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
         if (SSL3_RECORD_get_epoch(rr) != s->rlayer.d->r_epoch
                 || SSL3_RECORD_get_length(rr) < DTLS1_HM_HEADER_LENGTH) {
             SSL3_RECORD_set_length(rr, 0);
+            SSL3_RECORD_set_read(rr);
             goto start;
         }
 
@@ -677,6 +695,7 @@ int dtls1_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
                     return -1;
             }
             SSL3_RECORD_set_length(rr, 0);
+            SSL3_RECORD_set_read(rr);
             if (!(s->mode & SSL_MODE_AUTO_RETRY)) {
                 if (SSL3_BUFFER_get_left(&s->rlayer.rbuf) == 0) {
                     /* no read-ahead left? */