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| author | George V. Neville-Neil <gnn@FreeBSD.org> | 2016-07-08 23:44:09 +0000 |
|---|---|---|
| committer | George V. Neville-Neil <gnn@FreeBSD.org> | 2016-07-08 23:44:09 +0000 |
| commit | 15dbc1605b09d8cda88ed4d0275c985e7ffc0233 (patch) | |
| tree | f7c3b99ddc33f19c8a78554d4daa669c39f6dcbb /cddl/lib | |
| parent | aa0bf3d6061df500c2df1feb808a85af17bb4f8f (diff) | |
| download | src-15dbc1605b09d8cda88ed4d0275c985e7ffc0233.tar.gz src-15dbc1605b09d8cda88ed4d0275c985e7ffc0233.zip | |
On FreeBSD there is a setsockopt option SO_USER_COOKIE which allows
setting a 32 bit value on each socket. This can be used by applications
and DTrace as a rendezvous point so that an applicaton's data can
more easily be captured at run time. Expose the user cookie via
DTrace by updating the translator in tcp.d and add a quick test
program, a TCP server, that sets the cookie on each connection
accepted.
Reviewed by: hiren
MFC after: 1 week
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D7152
Notes
Notes:
svn path=/head/; revision=302474
Diffstat (limited to 'cddl/lib')
| -rw-r--r-- | cddl/lib/libdtrace/tcp.d | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/cddl/lib/libdtrace/tcp.d b/cddl/lib/libdtrace/tcp.d index 9b27076d8096..c5592d26396f 100644 --- a/cddl/lib/libdtrace/tcp.d +++ b/cddl/lib/libdtrace/tcp.d @@ -126,6 +126,7 @@ typedef struct tcpsinfo { int tcps_retransmit; /* retransmit send event, boolean */ int tcps_srtt; /* smoothed RTT in units of (TCP_RTT_SCALE*hz) */ int tcps_debug; /* socket has SO_DEBUG set */ + int tcps_cookie; /* expose the socket's SO_USER_COOKIE */ int32_t tcps_dupacks; /* consecutive dup acks received */ uint32_t tcps_rtttime; /* RTT measurement start time */ uint32_t tcps_rtseq; /* sequence # being timed */ @@ -224,6 +225,8 @@ translator tcpsinfo_t < struct tcpcb *p > { tcps_srtt = p == NULL ? -1 : p->t_srtt; /* smoothed RTT in units of (TCP_RTT_SCALE*hz) */ tcps_debug = p == NULL ? 0 : p->t_inpcb->inp_socket->so_options & 1; + tcps_cookie = p == NULL ? -1 : + p->t_inpcb->inp_socket->so_user_cookie; tcps_dupacks = p == NULL ? -1 : p->t_dupacks; tcps_rtttime = p == NULL ? -1 : p->t_rtttime; tcps_rtseq = p == NULL ? -1 : p->t_rtseq; |