X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fpackets.c;h=2dc82fe12e0d138cf821218fd7633cbfa24f58a4;hb=eb9b830766044475277a590dbf8d213b77b62188;hp=0547791ab653d86a8812306a8c27ab948f521dc8;hpb=b9e8b45a3936441bd0fd1fd156cae498bf72cac8;p=openvswitch

diff --git a/lib/packets.c b/lib/packets.c
index 0547791a..2dc82fe1 100644
--- a/lib/packets.c
+++ b/lib/packets.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009 Nicira Networks.
+ * Copyright (c) 2009, 2010 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,8 +17,35 @@
 #include <config.h>
 #include "packets.h"
 #include <netinet/in.h>
+#include <stdlib.h>
 #include "ofpbuf.h"
 
+/* Parses 's' as a 16-digit hexadecimal number representing a datapath ID.  On
+ * success stores the dpid into '*dpidp' and returns true, on failure stores 0
+ * into '*dpidp' and returns false.
+ *
+ * Rejects an all-zeros dpid as invalid. */
+bool
+dpid_from_string(const char *s, uint64_t *dpidp)
+{
+    *dpidp = (strlen(s) == 16 && strspn(s, "0123456789abcdefABCDEF") == 16
+              ? strtoull(s, NULL, 16)
+              : 0);
+    return *dpidp != 0;
+}
+
+bool
+eth_addr_from_string(const char *s, uint8_t ea[ETH_ADDR_LEN])
+{
+    if (sscanf(s, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(ea))
+        == ETH_ADDR_SCAN_COUNT) {
+        return true;
+    } else {
+        memset(ea, 0, ETH_ADDR_LEN);
+        return false;
+    }
+}
+
 /* Fills 'b' with an 802.2 SNAP packet with Ethernet source address 'eth_src',
  * the Nicira OUI as SNAP organization and 'snap_type' as SNAP type.  The text
  * string in 'tag' is enclosed as the packet payload.