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Diffstat (limited to 'test/packetdrill/tcp_options_iterator.h')
-rw-r--r-- | test/packetdrill/tcp_options_iterator.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/test/packetdrill/tcp_options_iterator.h b/test/packetdrill/tcp_options_iterator.h new file mode 100644 index 0000000..21f6c86 --- /dev/null +++ b/test/packetdrill/tcp_options_iterator.h @@ -0,0 +1,53 @@ +/* + * Copyright 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ +/* + * Author: ncardwell@google.com (Neal Cardwell) + * + * Interface for a module to allow iteration over TCP options in wire format. + */ + +#ifndef __TCP_OPTIONS_ITERATOR_H__ +#define __TCP_OPTIONS_ITERATOR_H__ + +#include "types.h" + +#include "packet.h" +#include "tcp_options.h" + +/* Internal state for an iterator for TCP options in wire format. */ +struct tcp_options_iterator { + u8 *current_option; + u8 *options_end; +}; + +/* Initialize the iterator to iterate over the TCP options in the + * given packet. Return a pointer to the first option in the packet, + * or NULL if there are none. + */ +extern struct tcp_option *tcp_options_begin( + struct packet *packet, + struct tcp_options_iterator *iter); + +/* Return a pointer to the next option in the packet, or NULL if there + * are no more. On failure returns NULL and sets error message. + */ +extern struct tcp_option *tcp_options_next( + struct tcp_options_iterator *iter, char **error); + +#endif /* __TCP_OPTIONS_ITERATOR_H__ */ |