From 83263b74460656ba557fd9bb84dc27258549e9cd Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@tinc-vpn.org>
Date: Thu, 24 Jul 2003 12:08:16 +0000
Subject: [PATCH] Sprinkle around a lot of const and some C99 initialisers.

---
 lib/avl_tree.c        | 12 ++++-----
 lib/avl_tree.h        | 10 ++++----
 src/conf.c            | 18 ++++++-------
 src/conf.h            | 16 ++++++------
 src/connection.c      |  4 +--
 src/edge.c            | 16 ++++++------
 src/edge.h            |  4 +--
 src/event.c           |  4 +--
 src/net.h             | 10 ++++----
 src/net_packet.c      |  6 ++---
 src/net_socket.c      |  6 ++---
 src/netutl.c          | 26 +++++++++----------
 src/netutl.h          | 18 ++++++-------
 src/node.c            | 25 ++++++++++--------
 src/node.h            |  6 ++---
 src/protocol.c        | 21 ++++++++-------
 src/protocol.h        | 24 +++++++++---------
 src/protocol_edge.c   |  6 ++---
 src/protocol_key.c    |  8 +++---
 src/protocol_misc.c   |  6 ++---
 src/protocol_subnet.c |  6 ++---
 src/subnet.c          | 59 +++++++++++++++++++++++--------------------
 src/subnet.h          | 14 +++++-----
 23 files changed, 166 insertions(+), 159 deletions(-)

diff --git a/lib/avl_tree.c b/lib/avl_tree.c
index 65df7b79..be35b969 100644
--- a/lib/avl_tree.c
+++ b/lib/avl_tree.c
@@ -29,7 +29,7 @@
     library for inclusion into tinc (http://tinc.nl.linux.org/) by
     Guus Sliepen <guus@sliepen.eu.org>.
 
-    $Id: avl_tree.c,v 1.1.2.16 2003/07/17 15:06:25 guus Exp $
+    $Id: avl_tree.c,v 1.1.2.17 2003/07/24 12:08:14 guus Exp $
 */
 
 #include "system.h"
@@ -90,7 +90,7 @@ static int lg(unsigned int u)
 
 /* Internal helper functions */
 
-static int avl_check_balance(avl_node_t *node)
+static int avl_check_balance(const avl_node_t *node)
 {
 #ifdef AVL_DEPTH
 	int d;
@@ -666,7 +666,7 @@ void avl_delete_tree(avl_tree_t *tree)
 
 /* Tree walking */
 
-void avl_foreach(avl_tree_t *tree, avl_action_t action)
+void avl_foreach(const avl_tree_t *tree, avl_action_t action)
 {
 	avl_node_t *node, *next;
 
@@ -676,7 +676,7 @@ void avl_foreach(avl_tree_t *tree, avl_action_t action)
 	}
 }
 
-void avl_foreach_node(avl_tree_t *tree, avl_action_t action)
+void avl_foreach_node(const avl_tree_t *tree, avl_action_t action)
 {
 	avl_node_t *node, *next;
 
@@ -689,7 +689,7 @@ void avl_foreach_node(avl_tree_t *tree, avl_action_t action)
 /* Indexing */
 
 #ifdef AVL_COUNT
-unsigned int avl_count(avl_tree_t *tree)
+unsigned int avl_count(const avl_tree_t *tree)
 {
 	return AVL_NODE_COUNT(tree->root);
 }
@@ -734,7 +734,7 @@ unsigned int avl_index(const avl_node_t *node)
 }
 #endif
 #ifdef AVL_DEPTH
-unsigned int avl_depth(avl_tree_t *tree)
+unsigned int avl_depth(const avl_tree_t *tree)
 {
 	return AVL_NODE_DEPTH(tree->root);
 }
diff --git a/lib/avl_tree.h b/lib/avl_tree.h
index b026e1e7..8007a516 100644
--- a/lib/avl_tree.h
+++ b/lib/avl_tree.h
@@ -29,7 +29,7 @@
     library for inclusion into tinc (http://tinc.nl.linux.org/) by
     Guus Sliepen <guus@sliepen.eu.org>.
 
-    $Id: avl_tree.h,v 1.1.2.9 2003/07/12 17:48:38 guus Exp $
+    $Id: avl_tree.h,v 1.1.2.10 2003/07/24 12:08:15 guus Exp $
 */
 
 
@@ -128,18 +128,18 @@ extern avl_node_t *avl_search_closest_greater_node(const avl_tree_t *, const voi
 
 /* Tree walking */
 
-extern void avl_foreach(avl_tree_t *, avl_action_t);
-extern void avl_foreach_node(avl_tree_t *, avl_action_t);
+extern void avl_foreach(const avl_tree_t *, avl_action_t);
+extern void avl_foreach_node(const avl_tree_t *, avl_action_t);
 
 /* Indexing */
 
 #ifdef AVL_COUNT
-extern unsigned int avl_count(avl_tree_t *);
+extern unsigned int avl_count(const avl_tree_t *);
 extern avl_node_t *avl_get_node(const avl_tree_t *, unsigned int);
 extern unsigned int avl_index(const avl_node_t *);
 #endif
 #ifdef AVL_DEPTH
-extern unsigned int avl_depth(avl_tree_t *);
+extern unsigned int avl_depth(const avl_tree_t *);
 #endif
 
 #endif							/* __AVL_TREE_H__ */
diff --git a/src/conf.c b/src/conf.c
index d34a087c..4a444433 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -19,7 +19,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: conf.c,v 1.9.4.68 2003/07/22 20:55:19 guus Exp $
+    $Id: conf.c,v 1.9.4.69 2003/07/24 12:08:15 guus Exp $
 */
 
 #include "system.h"
@@ -37,7 +37,7 @@ int pingtimeout = 0;			/* seconds before timeout */
 char *confbase = NULL;			/* directory in which all config files are */
 char *netname = NULL;			/* name of the vpn network */
 
-static int config_compare(config_t *a, config_t *b)
+static int config_compare(const config_t *a, const config_t *b)
 {
 	int result;
 
@@ -99,7 +99,7 @@ void config_add(avl_tree_t *config_tree, config_t *cfg)
 	avl_insert(config_tree, cfg);
 }
 
-config_t *lookup_config(avl_tree_t *config_tree, char *variable)
+config_t *lookup_config(const avl_tree_t *config_tree, char *variable)
 {
 	config_t cfg, *found;
 
@@ -120,7 +120,7 @@ config_t *lookup_config(avl_tree_t *config_tree, char *variable)
 	return found;
 }
 
-config_t *lookup_config_next(avl_tree_t *config_tree, config_t *cfg)
+config_t *lookup_config_next(const avl_tree_t *config_tree, const config_t *cfg)
 {
 	avl_node_t *node;
 	config_t *found;
@@ -141,7 +141,7 @@ config_t *lookup_config_next(avl_tree_t *config_tree, config_t *cfg)
 	return NULL;
 }
 
-bool get_config_bool(config_t *cfg, bool *result)
+bool get_config_bool(const config_t *cfg, bool *result)
 {
 	cp();
 
@@ -162,7 +162,7 @@ bool get_config_bool(config_t *cfg, bool *result)
 	return false;
 }
 
-bool get_config_int(config_t *cfg, int *result)
+bool get_config_int(const config_t *cfg, int *result)
 {
 	cp();
 
@@ -178,7 +178,7 @@ bool get_config_int(config_t *cfg, int *result)
 	return false;
 }
 
-bool get_config_string(config_t *cfg, char **result)
+bool get_config_string(const config_t *cfg, char **result)
 {
 	cp();
 
@@ -190,7 +190,7 @@ bool get_config_string(config_t *cfg, char **result)
 	return true;
 }
 
-bool get_config_address(config_t *cfg, struct addrinfo **result)
+bool get_config_address(const config_t *cfg, struct addrinfo **result)
 {
 	struct addrinfo *ai;
 
@@ -212,7 +212,7 @@ bool get_config_address(config_t *cfg, struct addrinfo **result)
 	return false;
 }
 
-bool get_config_subnet(config_t *cfg, subnet_t ** result)
+bool get_config_subnet(const config_t *cfg, subnet_t ** result)
 {
 	subnet_t *subnet;
 
diff --git a/src/conf.h b/src/conf.h
index b4064cd1..8ceb111e 100644
--- a/src/conf.h
+++ b/src/conf.h
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: conf.h,v 1.6.4.40 2003/07/22 20:55:19 guus Exp $
+    $Id: conf.h,v 1.6.4.41 2003/07/24 12:08:15 guus Exp $
 */
 
 #ifndef __TINC_CONF_H__
@@ -47,13 +47,13 @@ extern void exit_configuration(avl_tree_t **);
 extern config_t *new_config(void) __attribute__ ((malloc));
 extern void free_config(config_t *);
 extern void config_add(avl_tree_t *, config_t *);
-extern config_t *lookup_config(avl_tree_t *, char *);
-extern config_t *lookup_config_next(avl_tree_t *, config_t *);
-extern bool get_config_bool(config_t *, bool *);
-extern bool get_config_int(config_t *, int *);
-extern bool get_config_string(config_t *, char **);
-extern bool get_config_address(config_t *, struct addrinfo **);
-extern bool get_config_subnet(config_t *, struct subnet_t **);
+extern config_t *lookup_config(const avl_tree_t *, char *);
+extern config_t *lookup_config_next(const avl_tree_t *, const config_t *);
+extern bool get_config_bool(const config_t *, bool *);
+extern bool get_config_int(const config_t *, int *);
+extern bool get_config_string(const config_t *, char **);
+extern bool get_config_address(const config_t *, struct addrinfo **);
+extern bool get_config_subnet(const config_t *, struct subnet_t **);
 
 extern int read_config_file(avl_tree_t *, const char *);
 extern bool read_server_config(void);
diff --git a/src/connection.c b/src/connection.c
index eba74ae4..ccec2ed8 100644
--- a/src/connection.c
+++ b/src/connection.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: connection.c,v 1.1.2.41 2003/07/22 20:55:19 guus Exp $
+    $Id: connection.c,v 1.1.2.42 2003/07/24 12:08:15 guus Exp $
 */
 
 #include "system.h"
@@ -35,7 +35,7 @@
 avl_tree_t *connection_tree;	/* Meta connections */
 connection_t *broadcast;
 
-static int connection_compare(connection_t *a, connection_t *b)
+static int connection_compare(const connection_t *a, const connection_t *b)
 {
 	return (void *)a - (void *)b;
 }
diff --git a/src/edge.c b/src/edge.c
index 48ead007..76bdc41b 100644
--- a/src/edge.c
+++ b/src/edge.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: edge.c,v 1.1.2.22 2003/07/17 15:06:26 guus Exp $
+    $Id: edge.c,v 1.1.2.23 2003/07/24 12:08:15 guus Exp $
 */
 
 #include "system.h"
@@ -32,12 +32,12 @@
 
 avl_tree_t *edge_weight_tree;	/* Tree with all edges, sorted on weight */
 
-static int edge_compare(edge_t *a, edge_t *b)
+static int edge_compare(const edge_t *a, const edge_t *b)
 {
 	return strcmp(a->to->name, b->to->name);
 }
 
-static int edge_weight_compare(edge_t *a, edge_t *b)
+static int edge_weight_compare(const edge_t *a, const edge_t *b)
 {
 	int result;
 
@@ -123,15 +123,15 @@ void edge_del(edge_t *e)
 	avl_delete(edge_weight_tree, e);
 }
 
-edge_t *lookup_edge(node_t *from, node_t *to)
+edge_t *lookup_edge(const node_t *from, const node_t *to)
 {
-	edge_t v;
+	edge_t v = {
+		.from = from,
+		.to = to
+	};
 
 	cp();
 
-	v.from = from;
-	v.to = to;
-
 	return avl_search(from->edge_tree, &v);
 }
 
diff --git a/src/edge.h b/src/edge.h
index b841bc9b..0f723132 100644
--- a/src/edge.h
+++ b/src/edge.h
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: edge.h,v 1.1.2.14 2003/07/17 15:06:26 guus Exp $
+    $Id: edge.h,v 1.1.2.15 2003/07/24 12:08:15 guus Exp $
 */
 
 #ifndef __TINC_EDGE_H__
@@ -50,7 +50,7 @@ extern avl_tree_t *new_edge_tree(void) __attribute__ ((malloc));
 extern void free_edge_tree(avl_tree_t *);
 extern void edge_add(edge_t *);
 extern void edge_del(edge_t *);
-extern edge_t *lookup_edge(struct node_t *, struct node_t *);
+extern edge_t *lookup_edge(const struct node_t *, const struct node_t *);
 extern void dump_edges(void);
 
 #endif							/* __TINC_EDGE_H__ */
diff --git a/src/event.c b/src/event.c
index 4eae34d1..4e0f6a09 100644
--- a/src/event.c
+++ b/src/event.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: event.c,v 1.1.4.9 2003/07/17 15:06:26 guus Exp $
+    $Id: event.c,v 1.1.4.10 2003/07/24 12:08:15 guus Exp $
 */
 
 #include "system.h"
@@ -32,7 +32,7 @@ extern time_t now;
 
 int id;
 
-static int event_compare(event_t *a, event_t *b)
+static int event_compare(const event_t *a, const event_t *b)
 {
 	if(a->time > b->time)
 		return 1;
diff --git a/src/net.h b/src/net.h
index 22d78b2b..8ab33615 100644
--- a/src/net.h
+++ b/src/net.h
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: net.h,v 1.9.4.66 2003/07/22 20:55:20 guus Exp $
+    $Id: net.h,v 1.9.4.67 2003/07/24 12:08:15 guus Exp $
 */
 
 #ifndef __TINC_NET_H__
@@ -126,11 +126,11 @@ extern void handle_incoming_vpn_data(int);
 extern void finish_connecting(struct connection_t *);
 extern void do_outgoing_connection(struct connection_t *);
 extern bool handle_new_meta_connection(int);
-extern int setup_listen_socket(sockaddr_t *);
-extern int setup_vpn_in_socket(sockaddr_t *);
-extern void send_packet(struct node_t *, vpn_packet_t *);
+extern int setup_listen_socket(const sockaddr_t *);
+extern int setup_vpn_in_socket(const sockaddr_t *);
+extern void send_packet(const struct node_t *, vpn_packet_t *);
 extern void receive_tcppacket(struct connection_t *, char *, int);
-extern void broadcast_packet(struct node_t *, vpn_packet_t *);
+extern void broadcast_packet(const struct node_t *, vpn_packet_t *);
 extern bool setup_network_connections(void);
 extern void setup_outgoing_connection(struct outgoing_t *);
 extern void try_outgoing_connections(void);
diff --git a/src/net_packet.c b/src/net_packet.c
index cac24ee6..ff57753f 100644
--- a/src/net_packet.c
+++ b/src/net_packet.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: net_packet.c,v 1.1.2.35 2003/07/22 20:55:20 guus Exp $
+    $Id: net_packet.c,v 1.1.2.36 2003/07/24 12:08:15 guus Exp $
 */
 
 #include "system.h"
@@ -323,7 +323,7 @@ static void send_udppacket(node_t *n, vpn_packet_t *inpkt)
 /*
   send a packet to the given vpn ip.
 */
-void send_packet(node_t *n, vpn_packet_t *packet)
+void send_packet(const node_t *n, vpn_packet_t *packet)
 {
 	node_t *via;
 
@@ -358,7 +358,7 @@ void send_packet(node_t *n, vpn_packet_t *packet)
 
 /* Broadcast a packet using the minimum spanning tree */
 
-void broadcast_packet(node_t *from, vpn_packet_t *packet)
+void broadcast_packet(const node_t *from, vpn_packet_t *packet)
 {
 	avl_node_t *node;
 	connection_t *c;
diff --git a/src/net_socket.c b/src/net_socket.c
index 98f5d1a2..aa7d3d99 100644
--- a/src/net_socket.c
+++ b/src/net_socket.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: net_socket.c,v 1.1.2.30 2003/07/22 20:55:20 guus Exp $
+    $Id: net_socket.c,v 1.1.2.31 2003/07/24 12:08:15 guus Exp $
 */
 
 #include "system.h"
@@ -43,7 +43,7 @@ int listen_sockets;
 
 /* Setup sockets */
 
-int setup_listen_socket(sockaddr_t *sa)
+int setup_listen_socket(const sockaddr_t *sa)
 {
 	int nfd, flags;
 	char *addrstr;
@@ -119,7 +119,7 @@ int setup_listen_socket(sockaddr_t *sa)
 	return nfd;
 }
 
-int setup_vpn_in_socket(sockaddr_t *sa)
+int setup_vpn_in_socket(const sockaddr_t *sa)
 {
 	int nfd, flags;
 	char *addrstr;
diff --git a/src/netutl.c b/src/netutl.c
index 0d34d8d6..cd50792f 100644
--- a/src/netutl.c
+++ b/src/netutl.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: netutl.c,v 1.12.4.48 2003/07/22 20:55:20 guus Exp $
+    $Id: netutl.c,v 1.12.4.49 2003/07/24 12:08:15 guus Exp $
 */
 
 #include "system.h"
@@ -34,7 +34,7 @@ bool hostnames = false;
   Turn a string into a struct addrinfo.
   Return NULL on failure.
 */
-struct addrinfo *str2addrinfo(char *address, char *service, int socktype)
+struct addrinfo *str2addrinfo(const char *address, const char *service, int socktype)
 {
 	struct addrinfo hint, *ai;
 	int err;
@@ -57,7 +57,7 @@ struct addrinfo *str2addrinfo(char *address, char *service, int socktype)
 	return ai;
 }
 
-sockaddr_t str2sockaddr(char *address, char *port)
+sockaddr_t str2sockaddr(const char *address, const char *port)
 {
 	struct addrinfo hint, *ai;
 	sockaddr_t result;
@@ -87,7 +87,7 @@ sockaddr_t str2sockaddr(char *address, char *port)
 	return result;
 }
 
-void sockaddr2str(sockaddr_t *sa, char **addrstr, char **portstr)
+void sockaddr2str(const sockaddr_t *sa, char **addrstr, char **portstr)
 {
 	char address[NI_MAXHOST];
 	char port[NI_MAXSERV];
@@ -115,7 +115,7 @@ void sockaddr2str(sockaddr_t *sa, char **addrstr, char **portstr)
 	*portstr = xstrdup(port);
 }
 
-char *sockaddr2hostname(sockaddr_t *sa)
+char *sockaddr2hostname(const sockaddr_t *sa)
 {
 	char *str;
 	char address[NI_MAXHOST] = "unknown";
@@ -136,7 +136,7 @@ char *sockaddr2hostname(sockaddr_t *sa)
 	return str;
 }
 
-int sockaddrcmp(sockaddr_t *a, sockaddr_t *b)
+int sockaddrcmp(const sockaddr_t *a, const sockaddr_t *b)
 {
 	int result;
 
@@ -186,11 +186,11 @@ void sockaddrunmap(sockaddr_t *sa)
 
 /* Subnet mask handling */
 
-int maskcmp(void *va, void *vb, int masklen, int len)
+int maskcmp(const void *va, const void *vb, int masklen, int len)
 {
 	int i, m, result;
-	char *a = va;
-	char *b = vb;
+	const char *a = va;
+	const char *b = vb;
 
 	cp();
 
@@ -224,11 +224,11 @@ void mask(void *va, int masklen, int len)
 		a[i] = 0;
 }
 
-void maskcpy(void *va, void *vb, int masklen, int len)
+void maskcpy(void *va, const void *vb, int masklen, int len)
 {
 	int i, m;
 	char *a = va;
-	char *b = vb;
+	const char *b = vb;
 
 	cp();
 
@@ -244,10 +244,10 @@ void maskcpy(void *va, void *vb, int masklen, int len)
 		a[i] = 0;
 }
 
-bool maskcheck(void *va, int masklen, int len)
+bool maskcheck(const void *va, int masklen, int len)
 {
 	int i;
-	char *a = va;
+	const char *a = va;
 
 	cp();
 
diff --git a/src/netutl.h b/src/netutl.h
index 66a7c972..d5a7feb8 100644
--- a/src/netutl.h
+++ b/src/netutl.h
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: netutl.h,v 1.2.4.17 2003/07/22 20:55:20 guus Exp $
+    $Id: netutl.h,v 1.2.4.18 2003/07/24 12:08:15 guus Exp $
 */
 
 #ifndef __TINC_NETUTL_H__
@@ -27,15 +27,15 @@
 
 extern bool hostnames;
 
-extern struct addrinfo *str2addrinfo(char *, char *, int);
-extern sockaddr_t str2sockaddr(char *, char *);
-extern void sockaddr2str(sockaddr_t *, char **, char **);
-extern char *sockaddr2hostname(sockaddr_t *);
-extern int sockaddrcmp(sockaddr_t *, sockaddr_t *);
+extern struct addrinfo *str2addrinfo(const char *, const char *, int);
+extern sockaddr_t str2sockaddr(const char *, const char *);
+extern void sockaddr2str(const sockaddr_t *, char **, char **);
+extern char *sockaddr2hostname(const sockaddr_t *);
+extern int sockaddrcmp(const sockaddr_t *, const sockaddr_t *);
 extern void sockaddrunmap(sockaddr_t *);
-extern int maskcmp(void *, void *, int, int);
-extern void maskcpy(void *, void *, int, int);
+extern int maskcmp(const void *, const void *, int, int);
+extern void maskcpy(void *, const void *, int, int);
 extern void mask(void *, int, int);
-extern bool maskcheck(void *, int, int);
+extern bool maskcheck(const void *, int, int);
 
 #endif							/* __TINC_NETUTL_H__ */
diff --git a/src/node.c b/src/node.c
index 5fc94a94..0401144f 100644
--- a/src/node.c
+++ b/src/node.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: node.c,v 1.1.2.23 2003/07/17 15:06:26 guus Exp $
+    $Id: node.c,v 1.1.2.24 2003/07/24 12:08:15 guus Exp $
 */
 
 #include "system.h"
@@ -35,12 +35,12 @@ avl_tree_t *node_udp_tree;		/* Known nodes, sorted by address and port */
 
 node_t *myself;
 
-static int node_compare(node_t *a, node_t *b)
+static int node_compare(const node_t *a, const node_t *b)
 {
 	return strcmp(a->name, b->name);
 }
 
-static int node_udp_compare(node_t *a, node_t *b)
+static int node_udp_compare(const node_t *a, const node_t *b)
 {
 	int result;
 
@@ -143,20 +143,25 @@ void node_del(node_t *n)
 	avl_delete(node_udp_tree, n);
 }
 
-node_t *lookup_node(char *name)
+node_t *lookup_node(const char *name)
 {
-	node_t n;
+	node_t n = {
+		.name = name,
+	};
+
 	cp();
-	n.name = name;
+	
 	return avl_search(node_tree, &n);
 }
 
-node_t *lookup_node_udp(sockaddr_t *sa)
+node_t *lookup_node_udp(const sockaddr_t *sa)
 {
-	node_t n;
+	node_t n = {
+		.address = *sa,
+		.name = NULL,
+	};
+
 	cp();
-	n.address = *sa;
-	n.name = NULL;
 
 	return avl_search(node_udp_tree, &n);
 }
diff --git a/src/node.h b/src/node.h
index 3dd112e6..02d84976 100644
--- a/src/node.h
+++ b/src/node.h
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: node.h,v 1.1.2.26 2003/07/22 20:55:20 guus Exp $
+    $Id: node.h,v 1.1.2.27 2003/07/24 12:08:15 guus Exp $
 */
 
 #ifndef __TINC_NODE_H__
@@ -83,8 +83,8 @@ extern node_t *new_node(void) __attribute__ ((malloc));
 extern void free_node(node_t *);
 extern void node_add(node_t *);
 extern void node_del(node_t *);
-extern node_t *lookup_node(char *);
-extern node_t *lookup_node_udp(sockaddr_t *);
+extern node_t *lookup_node(const char *);
+extern node_t *lookup_node_udp(const sockaddr_t *);
 extern void dump_nodes(void);
 
 #endif							/* __TINC_NODE_H__ */
diff --git a/src/protocol.c b/src/protocol.c
index ad7c57d7..dad7ccb6 100644
--- a/src/protocol.c
+++ b/src/protocol.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: protocol.c,v 1.28.4.142 2003/07/22 20:55:20 guus Exp $
+    $Id: protocol.c,v 1.28.4.143 2003/07/24 12:08:15 guus Exp $
 */
 
 #include "system.h"
@@ -53,12 +53,10 @@ static char (*request_name[]) = {
 
 static avl_tree_t *past_request_tree;
 
-bool check_id(char *id)
+bool check_id(const char *id)
 {
-	int i;
-
-	for(i = 0; i < strlen(id); i++)
-		if(!isalnum(id[i]) && id[i] != '_')
+	for(; *id; id++)
+		if(!isalnum(*id) && *id != '_')
 			return false;
 
 	return true;
@@ -180,7 +178,7 @@ bool receive_request(connection_t *c)
 	return true;
 }
 
-static int past_request_compare(past_request_t *a, past_request_t *b)
+static int past_request_compare(const past_request_t *a, const past_request_t *b)
 {
 	return strcmp(a->request, b->request);
 }
@@ -209,14 +207,15 @@ void exit_requests(void)
 	avl_delete_tree(past_request_tree);
 }
 
-bool seen_request(char *request)
+bool seen_request(const char *request)
 {
-	past_request_t p, *new;
+	past_request_t p = {
+		.request = request,
+	};
+	past_request_t *new;
 
 	cp();
 
-	p.request = request;
-
 	if(avl_search(past_request_tree, &p)) {
 		ifdebug(SCARY_THINGS) logger(LOG_DEBUG, _("Already seen request"));
 		return true;
diff --git a/src/protocol.h b/src/protocol.h
index 132a8e6e..fbbe0335 100644
--- a/src/protocol.h
+++ b/src/protocol.h
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: protocol.h,v 1.5.4.40 2003/07/22 20:55:20 guus Exp $
+    $Id: protocol.h,v 1.5.4.41 2003/07/24 12:08:16 guus Exp $
 */
 
 #ifndef __TINC_PROTOCOL_H__
@@ -63,11 +63,11 @@ typedef struct past_request_t {
 extern bool send_request(struct connection_t *, const char *, ...) __attribute__ ((format(printf, 2, 3)));
 extern void forward_request(struct connection_t *);
 extern bool receive_request(struct connection_t *);
-extern bool check_id(char *);
+extern bool check_id(const char *);
 
 extern void init_requests(void);
 extern void exit_requests(void);
-extern bool seen_request(char *);
+extern bool seen_request(const char *);
 extern void age_past_requests(void);
 
 /* Requests */
@@ -77,18 +77,18 @@ extern bool send_metakey(struct connection_t *);
 extern bool send_challenge(struct connection_t *);
 extern bool send_chal_reply(struct connection_t *);
 extern bool send_ack(struct connection_t *);
-extern bool send_status(struct connection_t *, int, char *);
-extern bool send_error(struct connection_t *, int, char *);
+extern bool send_status(struct connection_t *, int, const char *);
+extern bool send_error(struct connection_t *, int,const  char *);
 extern bool send_termreq(struct connection_t *);
 extern bool send_ping(struct connection_t *);
 extern bool send_pong(struct connection_t *);
-extern bool send_add_subnet(struct connection_t *, struct subnet_t *);
-extern bool send_del_subnet(struct connection_t *, struct subnet_t *);
-extern bool send_add_edge(struct connection_t *, struct edge_t *);
-extern bool send_del_edge(struct connection_t *, struct edge_t *);
-extern bool send_key_changed(struct connection_t *, struct node_t *);
-extern bool send_req_key(struct connection_t *, struct node_t *, struct node_t *);
-extern bool send_ans_key(struct connection_t *, struct node_t *, struct node_t *);
+extern bool send_add_subnet(struct connection_t *, const struct subnet_t *);
+extern bool send_del_subnet(struct connection_t *, const struct subnet_t *);
+extern bool send_add_edge(struct connection_t *, const struct edge_t *);
+extern bool send_del_edge(struct connection_t *, const struct edge_t *);
+extern bool send_key_changed(struct connection_t *, const struct node_t *);
+extern bool send_req_key(struct connection_t *, const struct node_t *, const struct node_t *);
+extern bool send_ans_key(struct connection_t *, const struct node_t *, const struct node_t *);
 extern bool send_tcppacket(struct connection_t *, struct vpn_packet_t *);
 
 /* Request handlers  */
diff --git a/src/protocol_edge.c b/src/protocol_edge.c
index e1e2ca01..4552a528 100644
--- a/src/protocol_edge.c
+++ b/src/protocol_edge.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: protocol_edge.c,v 1.1.4.19 2003/07/22 20:55:20 guus Exp $
+    $Id: protocol_edge.c,v 1.1.4.20 2003/07/24 12:08:16 guus Exp $
 */
 
 #include "system.h"
@@ -36,7 +36,7 @@
 #include "utils.h"
 #include "xalloc.h"
 
-bool send_add_edge(connection_t *c, edge_t *e)
+bool send_add_edge(connection_t *c, const edge_t *e)
 {
 	bool x;
 	char *address, *port;
@@ -163,7 +163,7 @@ bool add_edge_h(connection_t *c)
 	return true;
 }
 
-bool send_del_edge(connection_t *c, edge_t *e)
+bool send_del_edge(connection_t *c, const edge_t *e)
 {
 	cp();
 
diff --git a/src/protocol_key.c b/src/protocol_key.c
index 421e2a30..cb652c1e 100644
--- a/src/protocol_key.c
+++ b/src/protocol_key.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: protocol_key.c,v 1.1.4.21 2003/07/23 22:17:31 guus Exp $
+    $Id: protocol_key.c,v 1.1.4.22 2003/07/24 12:08:16 guus Exp $
 */
 
 #include "system.h"
@@ -34,7 +34,7 @@
 
 bool mykeyused = false;
 
-bool send_key_changed(connection_t *c, node_t *n)
+bool send_key_changed(connection_t *c, const node_t *n)
 {
 	cp();
 
@@ -82,7 +82,7 @@ bool key_changed_h(connection_t *c)
 	return true;
 }
 
-bool send_req_key(connection_t *c, node_t *from, node_t *to)
+bool send_req_key(connection_t *c, const node_t *from, const node_t *to)
 {
 	cp();
 
@@ -133,7 +133,7 @@ bool req_key_h(connection_t *c)
 	return true;
 }
 
-bool send_ans_key(connection_t *c, node_t *from, node_t *to)
+bool send_ans_key(connection_t *c, const node_t *from, const node_t *to)
 {
 	char key[MAX_STRING_SIZE];
 
diff --git a/src/protocol_misc.c b/src/protocol_misc.c
index 25a86abe..66f8980a 100644
--- a/src/protocol_misc.c
+++ b/src/protocol_misc.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: protocol_misc.c,v 1.1.4.12 2003/07/22 20:55:20 guus Exp $
+    $Id: protocol_misc.c,v 1.1.4.13 2003/07/24 12:08:16 guus Exp $
 */
 
 #include "system.h"
@@ -33,7 +33,7 @@
 
 /* Status and error notification routines */
 
-bool send_status(connection_t *c, int statusno, char *statusstring)
+bool send_status(connection_t *c, int statusno, const char *statusstring)
 {
 	cp();
 
@@ -62,7 +62,7 @@ bool status_h(connection_t *c)
 	return true;
 }
 
-bool send_error(connection_t *c, int err, char *errstring)
+bool send_error(connection_t *c, int err, const char *errstring)
 {
 	cp();
 
diff --git a/src/protocol_subnet.c b/src/protocol_subnet.c
index 48b5efef..bb2f2def 100644
--- a/src/protocol_subnet.c
+++ b/src/protocol_subnet.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: protocol_subnet.c,v 1.1.4.14 2003/07/22 20:55:20 guus Exp $
+    $Id: protocol_subnet.c,v 1.1.4.15 2003/07/24 12:08:16 guus Exp $
 */
 
 #include "system.h"
@@ -33,7 +33,7 @@
 #include "utils.h"
 #include "xalloc.h"
 
-bool send_add_subnet(connection_t *c, subnet_t *subnet)
+bool send_add_subnet(connection_t *c, const subnet_t *subnet)
 {
 	bool x;
 	char *netstr;
@@ -122,7 +122,7 @@ bool add_subnet_h(connection_t *c)
 	return true;
 }
 
-bool send_del_subnet(connection_t *c, subnet_t *s)
+bool send_del_subnet(connection_t *c, const subnet_t *s)
 {
 	bool x;
 	char *netstr;
diff --git a/src/subnet.c b/src/subnet.c
index f5a8bd4b..4541594d 100644
--- a/src/subnet.c
+++ b/src/subnet.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: subnet.c,v 1.1.2.47 2003/07/17 15:06:27 guus Exp $
+    $Id: subnet.c,v 1.1.2.48 2003/07/24 12:08:16 guus Exp $
 */
 
 #include "system.h"
@@ -37,7 +37,7 @@ avl_tree_t *subnet_tree;
 
 /* Subnet comparison */
 
-static int subnet_compare_mac(subnet_t *a, subnet_t *b)
+static int subnet_compare_mac(const subnet_t *a, const subnet_t *b)
 {
 	int result;
 
@@ -49,7 +49,7 @@ static int subnet_compare_mac(subnet_t *a, subnet_t *b)
 	return strcmp(a->owner->name, b->owner->name);
 }
 
-static int subnet_compare_ipv4(subnet_t *a, subnet_t *b)
+static int subnet_compare_ipv4(const subnet_t *a, const subnet_t *b)
 {
 	int result;
 
@@ -66,7 +66,7 @@ static int subnet_compare_ipv4(subnet_t *a, subnet_t *b)
 	return strcmp(a->owner->name, b->owner->name);
 }
 
-static int subnet_compare_ipv6(subnet_t *a, subnet_t *b)
+static int subnet_compare_ipv6(const subnet_t *a, const subnet_t *b)
 {
 	int result;
 
@@ -83,7 +83,7 @@ static int subnet_compare_ipv6(subnet_t *a, subnet_t *b)
 	return strcmp(a->owner->name, b->owner->name);
 }
 
-static int subnet_compare(subnet_t *a, subnet_t *b)
+static int subnet_compare(const subnet_t *a, const subnet_t *b)
 {
 	int result;
 
@@ -177,7 +177,7 @@ void subnet_del(node_t *n, subnet_t *subnet)
 
 /* Ascii representation of subnets */
 
-subnet_t *str2net(char *subnetstr)
+subnet_t *str2net(const char *subnetstr)
 {
 	int i, l;
 	subnet_t *subnet;
@@ -246,7 +246,7 @@ subnet_t *str2net(char *subnetstr)
 	return NULL;
 }
 
-char *net2str(subnet_t *subnet)
+char *net2str(const subnet_t *subnet)
 {
 	char *netstr;
 
@@ -296,39 +296,41 @@ char *net2str(subnet_t *subnet)
 
 /* Subnet lookup routines */
 
-subnet_t *lookup_subnet(node_t *owner, subnet_t *subnet)
+subnet_t *lookup_subnet(const node_t *owner, const subnet_t *subnet)
 {
 	cp();
 
 	return avl_search(owner->subnet_tree, subnet);
 }
 
-subnet_t *lookup_subnet_mac(mac_t *address)
+subnet_t *lookup_subnet_mac(const mac_t *address)
 {
-	subnet_t subnet, *p;
+	subnet_t subnet = {
+		.type = SUBNET_MAC,
+		.net.mac.address = *address,
+		.owner = NULL
+	};
+	subnet_t *p;
 
 	cp();
 
-	subnet.type = SUBNET_MAC;
-	memcpy(&subnet.net.mac.address, address, sizeof(mac_t));
-	subnet.owner = NULL;
-
 	p = (subnet_t *) avl_search(subnet_tree, &subnet);
 
 	return p;
 }
 
-subnet_t *lookup_subnet_ipv4(ipv4_t *address)
+subnet_t *lookup_subnet_ipv4(const ipv4_t *address)
 {
-	subnet_t subnet, *p;
+	subnet_t subnet = {
+		.type = SUBNET_IPV4,
+		.net.ipv4.address = *address,
+		.net.ipv4.prefixlength = 32,
+		.owner = NULL
+	};
+	subnet_t *p;
 
 	cp();
 
-	subnet.type = SUBNET_IPV4;
-	memcpy(&subnet.net.ipv4.address, address, sizeof(ipv4_t));
-	subnet.net.ipv4.prefixlength = 32;
-	subnet.owner = NULL;
-
 	do {
 		/* Go find subnet */
 
@@ -356,17 +358,18 @@ subnet_t *lookup_subnet_ipv4(ipv4_t *address)
 	return p;
 }
 
-subnet_t *lookup_subnet_ipv6(ipv6_t *address)
+subnet_t *lookup_subnet_ipv6(const ipv6_t *address)
 {
-	subnet_t subnet, *p;
+	subnet_t subnet = {
+		.type = SUBNET_IPV6,
+		.net.ipv6.address = *address,
+		.net.ipv6.prefixlength = 128,
+		.owner = NULL
+	};
+	subnet_t *p;
 
 	cp();
 
-	subnet.type = SUBNET_IPV6;
-	memcpy(&subnet.net.ipv6.address, address, sizeof(ipv6_t));
-	subnet.net.ipv6.prefixlength = 128;
-	subnet.owner = NULL;
-
 	do {
 		/* Go find subnet */
 
diff --git a/src/subnet.h b/src/subnet.h
index 7cb0e9bb..edca1c74 100644
--- a/src/subnet.h
+++ b/src/subnet.h
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: subnet.h,v 1.1.2.22 2003/07/22 20:55:20 guus Exp $
+    $Id: subnet.h,v 1.1.2.23 2003/07/24 12:08:16 guus Exp $
 */
 
 #ifndef __TINC_SUBNET_H__
@@ -72,12 +72,12 @@ extern avl_tree_t *new_subnet_tree(void) __attribute__ ((malloc));
 extern void free_subnet_tree(avl_tree_t *);
 extern void subnet_add(struct node_t *, subnet_t *);
 extern void subnet_del(struct node_t *, subnet_t *);
-extern char *net2str(subnet_t *);
-extern subnet_t *str2net(char *);
-extern subnet_t *lookup_subnet(struct node_t *, subnet_t *);
-extern subnet_t *lookup_subnet_mac(mac_t *);
-extern subnet_t *lookup_subnet_ipv4(ipv4_t *);
-extern subnet_t *lookup_subnet_ipv6(ipv6_t *);
+extern char *net2str(const subnet_t *);
+extern subnet_t *str2net(const char *);
+extern subnet_t *lookup_subnet(const struct node_t *, const subnet_t *);
+extern subnet_t *lookup_subnet_mac(const mac_t *);
+extern subnet_t *lookup_subnet_ipv4(const ipv4_t *);
+extern subnet_t *lookup_subnet_ipv6(const ipv6_t *);
 extern void dump_subnets(void);
 
 #endif							/* __TINC_SUBNET_H__ */
-- 
2.20.1