net-snk: Move global variable definition out of the header file

The IPv6 code declares a bunch of global variables (without "extern"
keyword!) in the ipv6.h header file. This is bad style and does not
work when linking with "-fno-common" for example. So let's move
the variables to the files where they are used instead.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>

clients/net-snk/app/netlib/dhcpv6.c

@@ -27,6 +27,8 @@ static uint8_t tid[3];
 static uint32_t dhcpv6_state = -1;
 static filename_ip_t *my_fn_ip;
 
+static struct ip6addr_list_entry all_dhcpv6_ll; /* All DHCPv6 servers address */
+
 void
 dhcpv6_generate_transaction_id(void)
 {
@@ -115,6 +117,9 @@ dhcpv6 ( char *ret_buffer, void *fn_ip)
 {
 	int fd;
 
+	all_dhcpv6_ll.addr.part.prefix = 0xff02000000000000ULL;
+	all_dhcpv6_ll.addr.part.interface_id = 0x10002ULL;
+
 	my_fn_ip = (filename_ip_t *) fn_ip;
 	fd = my_fn_ip->fd;
 

clients/net-snk/app/netlib/icmpv6.c

@@ -40,9 +40,8 @@ send_router_solicitation (int fd)
 			  sizeof(struct ip6hdr));
 
 	/* Destination is "All routers multicast address" (link-local) */
-	dest_addr.part.prefix       = all_routers_ll.addr.part.prefix;
+	dest_addr.part.prefix       = 0xff02000000000000ULL;
-	dest_addr.part.interface_id = all_routers_ll.addr.part.interface_id;
+	dest_addr.part.interface_id = 2;
-
 
 	/* Fill IPv6 header */
 	fill_ip6hdr (ether_packet + sizeof(struct ethhdr),

clients/net-snk/app/netlib/ipv6.c

@@ -37,15 +37,23 @@ static int ip6_is_multicast (ip6_addr_t * ip);
 
 /****************************** LOCAL VARIABLES **************************/
 
+/* List of Ipv6 Addresses */
+static struct ip6addr_list_entry *first_ip6;
+static struct ip6addr_list_entry *last_ip6;
+
 /* Own IPv6 address */
 static struct ip6addr_list_entry *own_ip6;
 
+/* All nodes link-local address */
+struct ip6addr_list_entry all_nodes_ll;
+
 /* Null IPv6 address */
 static ip6_addr_t null_ip6;
 
 /* helper variables */
 static uint8_t null_mac[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 
+struct ip6_config ip6_state;
 
 /****************************** IMPLEMENTATION ***************************/
 
@@ -365,21 +373,9 @@ ipv6_init (int fd)
 	/* Multicast addresses */
 	all_nodes_ll.addr.part.prefix         = 0xff02000000000000;
 	all_nodes_ll.addr.part.interface_id   = 1;
-	all_dhcpv6_ll.addr.part.prefix        = 0xff02000000000000ULL;
-	all_dhcpv6_ll.addr.part.interface_id  = 0x10002ULL;
-	all_routers_ll.addr.part.prefix       = 0xff02000000000000;
-	all_routers_ll.addr.part.interface_id      = 2;
-
 	ip6addr_add(&all_nodes_ll);
-	/* ... */
 
-	/* Router list */
+	ndp_init();
-	first_router = NULL;
-	last_router = first_router;
-
-	/* Init Neighbour cache */
-	first_neighbor = NULL;
-	last_neighbor  = first_neighbor;
 
 	send_router_solicitation (fd);
 	for(i=0; i < 4 && !is_ra_received(); i++) {

clients/net-snk/app/netlib/ipv6.h

@@ -127,28 +127,13 @@ struct ip6_config {
 	uint8_t managed_mode:1,
 		other_config:1,
 		reserved:6;
-} ip6_state;
+};
 
 /******************** VARIABLES **********************************************/
 /* Function pointer send_ip. Points either to send_ipv4() or send_ipv6() */
 extern int   (*send_ip) (int fd, void *, int);
 
-/* IPv6 link-local multicast addresses */
+extern struct ip6_config ip6_state;
-struct ip6addr_list_entry all_routers_ll; // Routers
-struct ip6addr_list_entry all_dhcpv6_ll;  // DHCPv6 servers
-struct ip6addr_list_entry all_nodes_ll;   // All IPv6 nodes
-
-/* List of Ipv6 Addresses */
-struct ip6addr_list_entry *first_ip6;
-struct ip6addr_list_entry *last_ip6;
-
-/* Neighbor cache */
-struct neighbor *first_neighbor;
-struct neighbor *last_neighbor;
-
-/* Router list */
-struct router *first_router;
-struct router *last_router;
 
 /******************** FUNCTIONS *********************************************/
 /* Handles IPv6-packets that are detected by receive_ether. */

clients/net-snk/app/netlib/ndp.c

@@ -17,6 +17,14 @@
 #include <netlib/icmpv6.h>
 #include <netlib/ndp.h>
 
+/* Neighbor cache */
+static struct neighbor *first_neighbor;
+static struct neighbor *last_neighbor;
+
+/* Router list */
+static struct router *first_router;
+static struct router *last_router;
+
 /*
  * NET: add new router to list
  * @param  struct router nghb  - new router
@@ -145,3 +153,14 @@ find_neighbor (ip6_addr_t *ip)
 
 	return NULL; /* neighbor is unknown */
 }
+
+void ndp_init(void)
+{
+	/* Router list */
+	first_router = NULL;
+	last_router = first_router;
+
+	/* Init Neighbour cache */
+	first_neighbor = NULL;
+	last_neighbor  = first_neighbor;
+}

clients/net-snk/app/netlib/ndp.h

@@ -59,6 +59,7 @@ struct neighbor {
 };
 
 /******************** FUNCTIONS *********************************************/
+void ndp_init(void);
 int8_t neighbor_add (struct neighbor *);
 void * neighbor_create (uint8_t *packet, struct packeth *headers);
 struct neighbor * find_neighbor (ip6_addr_t *);