[PATCH v4 0/5] tcp: use csum_iov() in tcp_update_check_tcp[4|6]()

[Laurent Vivier <lvivier@redhat.com>]

For vhost-user, we will need to spread TCP payload over
several buffers. To re-use tcp_update_check_tcp[4|6](),
provide an iovec rather than a pointer to a buffer.

This series updates also csum_iov() and pcap_iov() to
add an offset of bytes to skip in the iovec array.

It's based on top of "tcp: Use tcp_payload_t rather than tcphdr" that
is added in the series for convenience.

v3 adds "udp: Update UDP checksum using an iovec array" that modifies
csum_udp4() and csum_udp6() in the same way.

Laurent Vivier (5):
  tcp: Use tcp_payload_t rather than tcphdr
  pcap: Add an offset argument in pcap_iov()
  checksum: Add an offset argument in csum_iov()
  tcp: Update TCP checksum using an iovec array
  udp: Update UDP checksum using an iovec array

 checksum.c     |  46 ++++++++++-----
 checksum.h     |   7 ++-
 pcap.c         |   5 +-
 pcap.h         |   2 +-
 tap.c          |  14 ++++-
 tap.h          |   2 +-
 tcp.c          | 156 +++++++++++++++++++++++++++++++++++++------------
 tcp_buf.c      |  29 ---------
 tcp_internal.h |  29 +++++++++
 udp.c          |  17 ++++--
 10 files changed, 214 insertions(+), 93 deletions(-)

-- 
2.46.0