Add basic ipv6 support to Jim

Use -ipv6 to signify that ipv6 should be used

Signed-off-by: Steve Bennett <steveb@workware.net.au>

5 files changed, 79 insertions, 2 deletions

diff --git a/examples/sqlite3.tcl b/examples/sqlite3.tcl
new file mode 100644
index 0000000..9365cdf
--- /dev/null
+++ b/examples/sqlite3.tcl
@@ -0,0 +1,8 @@
+set db [sqlite3.open :memory:]
+$db query {CREATE TABLE plays (id, author, title)}
+$db query {INSERT INTO plays (id, author, title) VALUES (1, 'Goethe', 'Faust');}
+$db query {INSERT INTO plays (id, author, title) VALUES (2, 'Shakespeare', 'Hamlet');}
+$db query {INSERT INTO plays (id, author, title) VALUES (3, 'Sophocles', 'Oedipus Rex');}
+set res [$db query "SELECT * FROM plays"]
+$db close
+foreach r $res {puts $r(author)}
diff --git a/examples/udp.client b/examples/udp.client
index 32dbc02..da74e77 100644
--- a/examples/udp.client
+++ b/examples/udp.client
@@ -2,10 +2,26 @@
 
 set s [socket dgram]
 
-foreach i [range 1 20] {
+foreach i [range 1 5] {
 	# Specify the address and port with sendto
 	$s sendto "$i + $i + 10" 127.0.0.1:20000
 
 	# Receive the response - max length of 100
 	puts [$s recvfrom 100]
 }
+
+$s close
+
+# Now sending via a connected udp socket
+
+set s [socket dgram 127.0.0.1:20000]
+
+foreach i [range 5 10] {
+	# Socket is connected, so can just use puts here
+	# But remember to flush to ensure that each message is separate
+	$s puts -nonewline "$i * $i"
+	$s flush
+
+	# Receive the response - max length of 100
+	puts [$s recvfrom 100]
+}
diff --git a/examples/udp.server b/examples/udp.server
index c462647..03f41cd 100644
--- a/examples/udp.server
+++ b/examples/udp.server
@@ -16,7 +16,7 @@ $s readable {
 		set result "Error: $buf => $msg"
 	}
 
-	puts ", sending '$result'"
+	puts ", sending '$result' to $addr"
 
 	# Send the result back to where it came from
 	$s sendto $result $addr
diff --git a/examples/udp6.client b/examples/udp6.client
new file mode 100644
index 0000000..f3e680e
--- /dev/null
+++ b/examples/udp6.client
@@ -0,0 +1,27 @@
+# Example of sending from an unconnected ipv6 socket
+
+set s [socket -ipv6 dgram]
+
+foreach i [range 1 5] {
+	# Specify the address and port with sendto
+	$s sendto "$i + $i + 10" {[::1]:20000}
+
+	# Receive the response - max length of 100
+	puts [$s recvfrom 100]
+}
+
+$s close
+
+# Now sending via a connected udp socket
+
+set s [socket -ipv6 dgram {[::1]:20000}]
+
+foreach i [range 5 10] {
+	# Socket is connected, so can just use puts here
+	# But remember to flush to ensure that each message is separate
+	$s puts -nonewline "$i * $i"
+	$s flush
+
+	# Receive the response - max length of 100
+	puts [$s recvfrom 100]
+}
diff --git a/examples/udp6.server b/examples/udp6.server
new file mode 100644
index 0000000..da9b4bf
--- /dev/null
+++ b/examples/udp6.server
@@ -0,0 +1,26 @@
+# Example of a udp server listening on ipv6 which sends a response
+# Note that on many hosts, this will also respond to ipv4 requests too
+
+# Listen on port 20000.
+set s [socket -ipv6 dgram.server {[::]:20000}]
+
+# For each request...
+$s readable {
+	# Get the request (max 80 chars) - need the source address
+	set buf [$s recvfrom 80 addr]
+
+	puts -nonewline "read '$buf' from $addr"
+
+	try {
+		set result "$buf = [expr $buf]"
+	} on error {msg} {
+		set result "Error: $buf => $msg"
+	}
+
+	puts ", sending '$result'"
+
+	# Send the result back to where it came from
+	$s sendto $result $addr
+}
+
+vwait done