git: inet/inet6: Remove the v4-mapped address support

[Sepherosa Ziehau]

commit 727ccde8cce813911d885b7f6ed749dcea68a886
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Thu Dec 18 21:06:42 2014 +0800

    inet/inet6: Remove the v4-mapped address support
    
    This greatly simplies the code (even the IPv4 code) and avoids all kinds
    of possible port theft.
    
    INPCB:
    - Nuke IN6P_IPV6_V6ONLY, which is always on after this commit.
    - Change inp_vflag into inp_af (AF_INET or AF_INET6), since the socket
      is either IPv6 or IPv4, but never both.  Set inpcb.inp_af in
      in_pcballoc() instead of in every pru_attach methods.  Add INP_ISIPV4()
      and INP_ISIPV6() macros to check inpcb family (socket family and
      inpcb.inp_af are same).
    - Nuke the convoluted code in in_pcbbind() and in6_pcbbind() which is used
      to allow wildcard binding to accepting IPv4 connections on IPv6 wildcard
      bound sockets.
    - Nuke the code in in_pcblookup_pkthash() to match IPv4 faddr with IPv6
      wildcard bound socket.
    - Nuke in6_mapped_{peeraddr,sockaddr,savefaddr}(); use in6_{setpeeraddr,
      setsockaddr,savefaddr}() directly.
    - Nuke v4-mapped address convertion functions.
    - Don't allow binding to v4-mapped address in in6_pcbind().
    - Don't allow connecting to v4-mapped address in in6_pcbconnect().
    
    TCP:
    - Nuke the code in tcp_output() which takes care of the IP header TTL
      setting for v4-mapped IPv6 socket.
    - Don't allow binding to v4-mapped address (through in6_pcbbind()).
    - Don't allow connecting to v4-mapped address and nuke the related code
      (PRUC_NAMALLOC etc.).
    - Nuke the code (PRUC_FALLBACK etc.) to fallback to IPv4 connection if
      IPv6 connection fails, which is wrong.
    - Nuke the code for v4-mapped IPv6 socket in tcp6_soport().
    
    UDP:
    - Nuke the code for v4-mapped IPv6 socket in udp_input() and udp_append().
    - Don't allow binding to v4-mapped address (through in6_pcbbind()).
    - Don't allow connecting to v4-mapped address.
    - Don't allow sending datagrams to v4-mapped address and nuke the related
      code in udp6_output().
    - Nuke the code for v4-mapped IPv6 socket in udp6_disconnect()
    
    RIP:
    - Don't allow sending packets to v4-mapped address.
    - Don't allow binding to v4-mapped address.
    - Don't allow connecting to v4-mapped address.
    
    Misc fixup:
    - Don't force rip pru_attach method to return 0.  If in_pcballoc() fails,
      just return the error code.

Summary of changes:
 sys/net/netmsg.h            |   2 -
 sys/netinet/in_pcb.c        | 101 +++++-----------
 sys/netinet/in_pcb.h        |  14 +--
 sys/netinet/ip_divert.c     |   1 -
 sys/netinet/raw_ip.c        |   4 +-
 sys/netinet/sctp_asconf.c   |  27 +----
 sys/netinet/sctp_output.c   |  17 +--
 sys/netinet/sctp_pcb.c      | 164 ++++----------------------
 sys/netinet/sctp_pcb.h      |  17 ---
 sys/netinet/sctp_usrreq.c   |  83 +++----------
 sys/netinet/sctputil.c      |  18 +--
 sys/netinet/tcp_input.c     |   9 +-
 sys/netinet/tcp_output.c    |  17 +--
 sys/netinet/tcp_subr.c      |  40 ++-----
 sys/netinet/tcp_syncache.c  |   6 +-
 sys/netinet/tcp_timer.c     |   2 +-
 sys/netinet/tcp_usrreq.c    |  81 +++----------
 sys/netinet/udp_usrreq.c    | 138 +++-------------------
 sys/netinet6/icmp6.c        |   6 +-
 sys/netinet6/in6.c          |  58 ----------
 sys/netinet6/in6.h          |   4 -
 sys/netinet6/in6_pcb.c      | 124 +++-----------------
 sys/netinet6/in6_pcb.h      |   6 +-
 sys/netinet6/ip6_demux.c    |  18 +--
 sys/netinet6/ip6_output.c   |  11 +-
 sys/netinet6/raw_ip6.c      |  16 ++-
 sys/netinet6/sctp6_usrreq.c | 275 +++-----------------------------------------
 sys/netinet6/udp6_output.c  | 106 ++++++-----------
 sys/netinet6/udp6_usrreq.c  |  75 +++---------
 usr.bin/netstat/inet.c      |  30 ++---
 usr.bin/sockstat/sockstat.c |  26 ++---
 usr.bin/systat/netbw.c      |  20 ++--
 usr.bin/systat/netstat.c    |   2 +-
 33 files changed, 271 insertions(+), 1247 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/727ccde8cce813911d885b7f6ed749dcea68a886


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