The PortId is defined as a couple of ClockId (an 8-bytes opaque) and the
PortNumber (UInterger16).
In order to correctly handle the PortId endianess, the comparison has been
split in the ClockIds comparison (using memcmp) and PortNumber comparison.
---
bmc.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/bmc.c b/bmc.c
index 6ac7aa0..ebc0789 100644
--- a/bmc.c
+++ b/bmc.c
@@ -21,6 +21,17 @@
#include "bmc.h"
#include "ds.h"
+static int portid_cmp(struct PortIdentity *a, struct PortIdentity *b)
+{
+ int diff = memcmp(&a->clockIdentity, &b->clockIdentity,
sizeof(a->clockIdentity));
+
+ if (diff == 0) {
+ diff = a->portNumber - b->portNumber;
+ }
+
+ return diff;
+}
+
int dscmp2(struct dataset *a, struct dataset *b)
{
int diff;
@@ -35,7 +46,7 @@ int dscmp2(struct dataset *a, struct dataset *b)
* standard, since there is nothing we can do about it anyway.
*/
if (A < B) {
- diff = memcmp(&b->receiver, &b->sender, sizeof(b->receiver));
+ diff = portid_cmp(&b->receiver, &b->sender);
if (diff < 0)
return A_BETTER;
if (diff > 0)
@@ -44,7 +55,7 @@ int dscmp2(struct dataset *a, struct dataset *b)
return 0;
}
if (A > B) {
- diff = memcmp(&a->receiver, &a->sender, sizeof(a->receiver));
+ diff = portid_cmp(&a->receiver, &a->sender);
if (diff < 0)
return B_BETTER;
if (diff > 0)
@@ -53,7 +64,7 @@ int dscmp2(struct dataset *a, struct dataset *b)
return 0;
}
- diff = memcmp(&a->sender, &b->sender, sizeof(a->sender));
+ diff = portid_cmp(&a->sender, &b->sender);
if (diff < 0)
return A_BETTER_TOPO;
if (diff > 0)
--
2.38.1
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