NET: pass source IP address to packet handlers

This is needed for the upcoming TFTP server implementation.

This also simplifies PingHandler() and fixes rxhand_f documentation.

Signed-off-by: Luca Ceresoli <luca.ceresoli@comelit.it>
Cc: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index e27bb3e..e40efb8 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -40,13 +40,14 @@
 static const char *output_packet;	/* used by first send udp */
 static int output_packet_len = 0;
 
-static void nc_wait_arp_handler (uchar * pkt, unsigned dest, unsigned src,
+static void nc_wait_arp_handler(uchar *pkt, unsigned dest,
+				 IPaddr_t sip, unsigned src,
 				 unsigned len)
 {
 	NetState = NETLOOP_SUCCESS;	/* got arp reply - quit net loop */
 }
 
-static void nc_handler (uchar * pkt, unsigned dest, unsigned src,
+static void nc_handler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src,
 			unsigned len)
 {
 	if (input_size)