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>

2 files changed, 19 insertions, 10 deletions

diff --git a/tests/libzmq21.cpp b/tests/libzmq21.cpp
index ecf271b..3323ef0 100644
--- a/tests/libzmq21.cpp
+++ b/tests/libzmq21.cpp
@@ -53,8 +53,9 @@ int XS_TEST_MAIN ()
     assert (ctx);
     void *pub = xs_socket (ctx, XS_PUB);
     assert (pub);
-    int protocol = 1;
-    int rc = xs_setsockopt (pub, XS_PROTOCOL, &protocol, sizeof (protocol));
+    int pattern_version = 1;
+    int rc = xs_setsockopt (pub, XS_PATTERN_VERSION, &pattern_version,
+        sizeof (pattern_version));
     assert (rc == 0);
     rc = xs_bind (pub, "tcp://127.0.0.1:5560");
     assert (rc != -1);
@@ -99,8 +100,9 @@ int XS_TEST_MAIN ()
     assert (ctx);
     void *sub = xs_socket (ctx, XS_SUB);
     assert (sub);
-    protocol = 1;
-    rc = xs_setsockopt (sub, XS_PROTOCOL, &protocol, sizeof (protocol));
+    pattern_version = 1;
+    rc = xs_setsockopt (sub, XS_PATTERN_VERSION, &pattern_version,
+        sizeof (pattern_version));
     assert (rc == 0);
     rc = xs_setsockopt (sub, XS_SUBSCRIBE, "", 0);
     assert (rc == 0);
diff --git a/tests/wireformat.cpp b/tests/wireformat.cpp
index f3e0f96..f12f5aa 100644
--- a/tests/wireformat.cpp
+++ b/tests/wireformat.cpp
@@ -49,7 +49,11 @@ int XS_TEST_MAIN ()
     assert (push);
 
     //  Bind the peer and get the message.
-    int rc = xs_bind (pull, "tcp://127.0.0.1:5560");
+    int service_id = 0x1234;
+    int rc = xs_setsockopt (pull, XS_SERVICE_ID, &service_id,
+        sizeof service_id);
+    assert (rc == 0);
+    rc = xs_bind (pull, "tcp://127.0.0.1:5560");
     assert (rc != -1);
     rc = xs_bind (push, "tcp://127.0.0.1:5561");
     assert (rc != -1);
@@ -71,10 +75,10 @@ int XS_TEST_MAIN ()
     assert (rc == 0);
 
     // Let's send some data and check if it arrived
-    rc = send (rpush, "\x04\0abc", 5, 0);
-    assert (rc == 5);
+    rc = send (rpush, "\0SP\0\x12\x34\x04\x31\x04\0abc", 13, 0);
+    assert (rc == 13);
     unsigned char buf [3];
-	unsigned char buf2 [3];
+    unsigned char buf2 [8];
     rc = xs_recv (pull, buf, sizeof (buf), 0);
     assert (rc == 3);
     assert (!memcmp (buf, "abc", 3));
@@ -83,8 +87,11 @@ int XS_TEST_MAIN ()
     rc = xs_send (push, buf, sizeof (buf), 0);
     assert (rc == 3);
     rc = recv (rpull, (char*) buf2, sizeof (buf2), 0);
-    assert (rc == 3);
-    assert (!memcmp (buf2, "\x04\0abc", 3));
+    assert (rc == 8);
+    assert (!memcmp (buf2, "\0SP\0\0\0\x04\x31", 8));
+    rc = recv (rpull, (char*) buf2, 5, 0);
+    assert (rc == 5);
+    assert (!memcmp (buf2, "\x04\0abc", 5));
 
 #if defined XS_HAVE_WINDOWS
     rc = closesocket (rpush);