ipc: adjusted socket descriptor structure for connection-oriented com…

…munication

src/include/kernel/socket.h

@@ -46,12 +46,14 @@ struct sockaddr_un {
 };
 
 /* socket-specific I/O descriptor (see io.h) */
-typedef struct {
+typedef struct SocketDescriptor {
+    Process *process;
     struct sockaddr address;
     bool listener;
     int type, protocol, backlog;
     int inboundCount, outboundCount;
     void **inbound, **outbound;
+    struct SocketDescriptor *peer;
 } SocketDescriptor;
 
 void socketInit();

src/ipc/sockinit.c

@@ -91,6 +91,7 @@ int socket(Thread *t, int domain, int type, int protocol) {
 
     // set up the socket family for now
     SocketDescriptor *sock = (SocketDescriptor *)iod->data;
+    sock->process = p;
     sock->address.sa_family = domain;
     sock->type = type & 0xFF;
     sock->protocol = protocol;