Current TCP code may miss an option if TCP_O_NOP option was used before it for proper aligning.
Signed-off-by: Mikhail Kshevetskiy mikhail.kshevetskiy@iopsys.eu --- net/tcp.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/net/tcp.c b/net/tcp.c index b0cc8a1fe3e..3e3118de450 100644 --- a/net/tcp.c +++ b/net/tcp.c @@ -475,7 +475,7 @@ void tcp_parse_options(uchar *o, int o_len) * NOPs are options with a zero length, and thus are special. * All other options have length fields. */ - for (p = o; p < (o + o_len); p = p + p[1]) { + for (p = o; p < (o + o_len); ) { if (!p[1]) return; /* Finished processing options */
@@ -490,12 +490,14 @@ void tcp_parse_options(uchar *o, int o_len) case TCP_O_TS: tsopt = (struct tcp_t_opt *)p; rmt_timestamp = tsopt->t_snd; - return; + break; }
/* Process optional NOPs */ if (p[0] == TCP_O_NOP) p++; + else + p += p[1]; } }