From 4f2011d981c2489b10e174cbda28a20303f655d1 Mon Sep 17 00:00:00 2001 From: Adam Langley Date: Fri, 6 Jun 2014 14:47:07 -0700 Subject: [PATCH] Remove some duplicate DTLS code. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In a couple of functions, a sequence number would be calculated twice. Additionally, in |dtls1_process_out_of_seq_message|, we know that |frag_len| <= |msg_hdr->msg_len| so the later tests for |frag_len < msg_hdr->msg_len| can be more clearly written as |frag_len != msg_hdr->msg_len|, since that's the only remaining case. Reviewed-by: Matt Caswell Reviewed-by: Emilia Käsper --- ssl/d1_both.c | 16 ++++------------ 1 file changed, 4 insertions(+), 12 deletions(-) diff --git a/ssl/d1_both.c b/ssl/d1_both.c index c195ee0f55..fb524dafa0 100644 --- a/ssl/d1_both.c +++ b/ssl/d1_both.c @@ -604,7 +604,7 @@ static unsigned long dtls1_max_handshake_message_len(const SSL *s) } static int -dtls1_reassemble_fragment(SSL *s, struct hm_header_st* msg_hdr, int *ok) +dtls1_reassemble_fragment(SSL *s, const struct hm_header_st* msg_hdr, int *ok) { hm_fragment *frag = NULL; pitem *item = NULL; @@ -687,10 +687,6 @@ dtls1_reassemble_fragment(SSL *s, struct hm_header_st* msg_hdr, int *ok) if (item == NULL) { - memset(seq64be,0,sizeof(seq64be)); - seq64be[6] = (unsigned char)(msg_hdr->seq>>8); - seq64be[7] = (unsigned char)(msg_hdr->seq); - item = pitem_new(seq64be, frag); if (item == NULL) { @@ -716,7 +712,7 @@ err: static int -dtls1_process_out_of_seq_message(SSL *s, struct hm_header_st* msg_hdr, int *ok) +dtls1_process_out_of_seq_message(SSL *s, const struct hm_header_st* msg_hdr, int *ok) { int i=-1; hm_fragment *frag = NULL; @@ -736,7 +732,7 @@ dtls1_process_out_of_seq_message(SSL *s, struct hm_header_st* msg_hdr, int *ok) /* If we already have an entry and this one is a fragment, * don't discard it and rather try to reassemble it. */ - if (item != NULL && frag_len < msg_hdr->msg_len) + if (item != NULL && frag_len != msg_hdr->msg_len) item = NULL; /* Discard the message if sequence number was already there, is @@ -761,7 +757,7 @@ dtls1_process_out_of_seq_message(SSL *s, struct hm_header_st* msg_hdr, int *ok) } else { - if (frag_len < msg_hdr->msg_len) + if (frag_len != msg_hdr->msg_len) return dtls1_reassemble_fragment(s, msg_hdr, ok); if (frag_len > dtls1_max_handshake_message_len(s)) @@ -784,10 +780,6 @@ dtls1_process_out_of_seq_message(SSL *s, struct hm_header_st* msg_hdr, int *ok) goto err; } - memset(seq64be,0,sizeof(seq64be)); - seq64be[6] = (unsigned char)(msg_hdr->seq>>8); - seq64be[7] = (unsigned char)(msg_hdr->seq); - item = pitem_new(seq64be, frag); if ( item == NULL) goto err; -- GitLab