blocksize = 0;
frag_off = 0;
+ s->rwstate = SSL_NOTHING;
+
/* s->init_num shouldn't ever be < 0...but just in case */
while (s->init_num > 0) {
+ if (type == SSL3_RT_HANDSHAKE && s->init_off != 0) {
+ /* We must be writing a fragment other than the first one */
+
+ if (frag_off > 0) {
+ /* This is the first attempt at writing out this fragment */
+
+ if (s->init_off <= DTLS1_HM_HEADER_LENGTH) {
+ /*
+ * Each fragment that was already sent must at least have
+ * contained the message header plus one other byte.
+ * Therefore |init_off| must have progressed by at least
+ * |DTLS1_HM_HEADER_LENGTH + 1| bytes. If not something went
+ * wrong.
+ */
+ return -1;
+ }
+
+ /*
+ * Adjust |init_off| and |init_num| to allow room for a new
+ * message header for this fragment.
+ */
+ s->init_off -= DTLS1_HM_HEADER_LENGTH;
+ s->init_num += DTLS1_HM_HEADER_LENGTH;
+ } else {
+ /*
+ * We must have been called again after a retry so use the
+ * fragment offset from our last attempt. We do not need
+ * to adjust |init_off| and |init_num| as above, because
+ * that should already have been done before the retry.
+ */
+ frag_off = s->d1->w_msg_hdr.frag_off;
+ }
+ }
+
used_len = BIO_wpending(SSL_get_wbio(s)) + DTLS1_RT_HEADER_LENGTH
+ mac_size + blocksize;
if (s->d1->mtu > used_len)
* grr.. we could get an error if MTU picked was wrong
*/
ret = BIO_flush(SSL_get_wbio(s));
- if (ret <= 0)
+ if (ret <= 0) {
+ s->rwstate = SSL_WRITING;
return ret;
+ }
used_len = DTLS1_RT_HEADER_LENGTH + mac_size + blocksize;
if (s->d1->mtu > used_len + DTLS1_HM_HEADER_LENGTH) {
curr_mtu = s->d1->mtu - used_len;
* XDTLS: this function is too long. split out the CCS part
*/
if (type == SSL3_RT_HANDSHAKE) {
- if (s->init_off != 0) {
- OPENSSL_assert(s->init_off > DTLS1_HM_HEADER_LENGTH);
- s->init_off -= DTLS1_HM_HEADER_LENGTH;
- s->init_num += DTLS1_HM_HEADER_LENGTH;
-
- /*
- * We just checked that s->init_num > 0 so this cast should
- * be safe
- */
- if (((unsigned int)s->init_num) > curr_mtu)
- len = curr_mtu;
- else
- len = s->init_num;
- }
-
- /* Shouldn't ever happen */
- if (len > INT_MAX)
- len = INT_MAX;
-
if (len < DTLS1_HM_HEADER_LENGTH) {
/*
* len is so small that we really can't do anything sensible
}
s->init_off += ret;
s->init_num -= ret;
- frag_off += (ret -= DTLS1_HM_HEADER_LENGTH);
+ ret -= DTLS1_HM_HEADER_LENGTH;
+ frag_off += ret;
+
+ /*
+ * We save the fragment offset for the next fragment so we have it
+ * available in case of an IO retry. We don't know the length of the
+ * next fragment yet so just set that to 0 for now. It will be
+ * updated again later.
+ */
+ dtls1_fix_message_header(s, frag_off, 0);
}
}
return (0);
return i;
}
+ if (mt >= 0 && s->s3->tmp.message_type != mt) {
+ al = SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_DTLS1_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE);
+ goto f_err;
+ }
+
p = (unsigned char *)s->init_buf->data;
msg_len = msg_hdr->msg_len;
/* parse the message fragment header */
dtls1_get_message_header(wire, &msg_hdr);
+ len = msg_hdr.msg_len;
+ frag_off = msg_hdr.frag_off;
+ frag_len = msg_hdr.frag_len;
+
+ /*
+ * We must have at least frag_len bytes left in the record to be read.
+ * Fragments must not span records.
+ */
+ if (frag_len > s->s3->rrec.length) {
+ al = SSL3_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_DTLS1_GET_MESSAGE_FRAGMENT, SSL_R_BAD_LENGTH);
+ goto f_err;
+ }
+
/*
* if this is a future (or stale) message it gets buffered
* (or dropped)--no further processing at this time
&& !(s->d1->listen && msg_hdr.seq == 1))
return dtls1_process_out_of_seq_message(s, &msg_hdr, ok);
- len = msg_hdr.msg_len;
- frag_off = msg_hdr.frag_off;
- frag_len = msg_hdr.frag_len;
-
if (frag_len && frag_len < len)
return dtls1_reassemble_fragment(s, &msg_hdr, ok);
if ((al = dtls1_preprocess_fragment(s, &msg_hdr, max)))
goto f_err;
- /* XDTLS: ressurect this when restart is in place */
- s->state = stn;
-
if (frag_len > 0) {
unsigned char *p =
(unsigned char *)s->init_buf->data + DTLS1_HM_HEADER_LENGTH;
i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE,
&p[frag_off], frag_len, 0);
+
/*
- * XDTLS: fix this--message fragments cannot span multiple packets
+ * This shouldn't ever fail due to NBIO because we already checked
+ * that we have enough data in the record
*/
if (i <= 0) {
s->rwstate = SSL_READING;
}
*ok = 1;
+ s->state = stn;
/*
* Note that s->init_num is *not* used as current offset in
{
int ret;
#ifndef OPENSSL_NO_SCTP
- if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
+ BIO *wbio;
+
+ wbio = SSL_get_wbio(s);
+ if (wbio != NULL && BIO_dgram_is_sctp(wbio) &&
!(s->shutdown & SSL_SENT_SHUTDOWN)) {
- ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
+ ret = BIO_dgram_sctp_wait_for_dry(wbio);
if (ret < 0)
return -1;
projects / openssl.git / blobdiff