From 1d76284dee8e9b0735a26ee98a3edcd9f5208f09 Mon Sep 17 00:00:00 2001
From: Martin Lucina <martin@lucina.net>
Date: Sun, 20 May 2012 07:40:11 +0200
Subject: Implement SP wire protocol

Implements the SP wire protocol, and infrastructure for legacy wire
protocol support.

Also added an XS_SERVICE_ID socket option to set the service id and renamed
the XS_PROTOCOL option to XS_PATTERN_VERSION.

The following pattern versions are supported:

PAIR:     v3
PUBSUB:   v1 (legacy), v4
REQREP:   v2
PIPELINE: v3
SURVEY:   v2

Note that all existing pattern versions have been bumped by 1 to allow for
use of legacy protocols (otherwise there would be no way to distinguish
between e.g. PUBSUB v3 and PUBSUB v3 using SP).

Signed-off-by: Martin Lucina <martin@lucina.net>
---
 src/xsurveyor.cpp | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

(limited to 'src/xsurveyor.cpp')

diff --git a/src/xsurveyor.cpp b/src/xsurveyor.cpp
index 985b6d8..7016550 100644
--- a/src/xsurveyor.cpp
+++ b/src/xsurveyor.cpp
@@ -21,11 +21,16 @@
 #include "xsurveyor.hpp"
 #include "err.hpp"
 #include "msg.hpp"
+#include "wire.hpp"
 
 xs::xsurveyor_t::xsurveyor_t (class ctx_t *parent_, uint32_t tid_, int sid_) :
     socket_base_t (parent_, tid_, sid_)
 {
     options.type = XS_XSURVEYOR;
+    options.sp_pattern = SP_SURVEY;
+    options.sp_version = 2;
+    options.sp_role = SP_SURVEY_SURVEYOR;
+    options.sp_complement = SP_SURVEY_RESPONDENT;
 
     //  When the XSURVEYOR socket is close it makes no sense to send any pending
     //  surveys. The responses will be unroutable anyway.
@@ -36,6 +41,34 @@ xs::xsurveyor_t::~xsurveyor_t ()
 {
 }
 
+int xs::xsurveyor_t::xsetsockopt (int option_, const void *optval_,
+    size_t optvallen_)
+{
+    if (option_ != XS_PATTERN_VERSION) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    if (optvallen_ != sizeof (int)) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    if (!optval_) {
+        errno = EFAULT;
+        return -1;
+    }
+
+    int version = *(int *) optval_;
+    if (version != 1) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    options.sp_version = version;
+    return 0;
+}
+
 void xs::xsurveyor_t::xattach_pipe (pipe_t *pipe_, bool icanhasall_)
 {
     xs_assert (pipe_);
-- 
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