net: add basic unix socket support (#8642)

vlib/net/aasocket.c.v

@@ -2,7 +2,9 @@ module net
 
 // Select represents a select operation
 enum Select {
-	read write except
+	read
+	write
+	except
 }
 
 // SocketType are the available sockets
@@ -14,6 +16,7 @@ pub enum SocketType {
 // SocketFamily are the available address families
 pub enum SocketFamily {
 	inet = C.AF_INET
+	unix = C.AF_UNIX
 }
 
 struct C.in_addr {
@@ -32,6 +35,11 @@ mut:
 	sin_addr   C.in_addr
 }
 
+struct C.sockaddr_un {
+mut:
+	sun_family int
+	sun_path   charptr
+}
 
 struct C.addrinfo {
 mut:
@@ -67,9 +75,11 @@ fn C.getaddrinfo() int
 fn C.connect() int
 
 fn C.send() int
+
 fn C.sendto() int
 
 fn C.recv() int
+
 fn C.recvfrom() int
 
 fn C.shutdown() int
@@ -89,11 +99,15 @@ fn C.getsockname() int
 // fn C.close() int
 
 fn C.ioctlsocket() int
+
 fn C.fcntl() int
 
 fn C.@select() int
+
 fn C.FD_ZERO()
+
 fn C.FD_SET()
+
 fn C.FD_ISSET() bool
 
 [typedef]

vlib/net/address.v

@@ -13,7 +13,7 @@ struct C.addrinfo {
 }
 
 pub fn (a Addr) str() string {
-	return '${a.saddr}:${a.port}'
+	return '$a.saddr:$a.port'
 }
 
 const (
@@ -29,7 +29,7 @@ fn new_addr(addr C.sockaddr) ?Addr {
 		0
 	}
 	// Convert to string representation
-	buf := []byte{ len: max_ipv4_addr_len, init: 0 }
+	buf := []byte{len: net.max_ipv4_addr_len, init: 0}
 	$if windows {
 		res := C.WSAAddressToStringA(&addr, addr_len, C.NULL, buf.data, &buf.len)
 		if res != 0 {
@@ -51,9 +51,7 @@ fn new_addr(addr C.sockaddr) ?Addr {
 		saddr = saddr.split(':')[0]
 	}
 
-	return Addr {
-		addr int(addr_len) saddr port
-	}
+	return Addr{addr, int(addr_len), saddr, port}
 }
 
 pub fn resolve_addr(addr string, family SocketFamily, typ SocketType) ?Addr {

vlib/net/net_nix.c.v

@@ -3,6 +3,7 @@ module net
 #include <unistd.h>
 #include <sys/socket.h>
 #include <sys/types.h>
+#include <sys/un.h>
 #include <sys/select.h>
 #include <arpa/inet.h>
 #include <netinet/in.h>
@@ -10,6 +11,7 @@ module net
 #include <errno.h>
 #include <fcntl.h>
 #flag solaris -lsocket
+
 fn error_code() int {
 	return C.errno
 }