1. 20 Nov, 2018 1 commit
    • Peter Wu's avatar
      wiretap: add read/write support for Decryption Secrets Block (DSB) · 52a66714
      Peter Wu authored
      Support reading and writing pcapng files with DSBs. A DSB may occur
      multiple times but should appear before packets that need those
      decryption secrets (so it cannot be moved to the end like NRB). The TLS
      dissector will be updated in the future to make use of these secrets.
      pcapng spec update: https://github.com/pcapng/pcapng/pull/54
      As DSBs may be interleaved with packets, do not even try to read it in
      pcapng_open (as is done for IDBs). Instead process them during the
      sequential read, appending them to the 'wtap::dsbs' array.
      Writing is more complicated, secrets may initially not be available when
      'wtap_dumper' is created. As they may become available in 'wtap::dsbs'
      as more packets are read, allow 'wtap_dumper::dsbs_growing' to reference
      this array. This saves every user from checking/dumping DSBs.
      If the wtap user needs to insert extra DSBs (while preserving existing
      DSBs), they can set the 'wtap_dumper::dsbs_initial' field.
      The test...