Signed-off-by: Richard Cochran <richardcoch...@gmail.com>
---
util.c | 28 ++++++++++++++++++++++++++++
util.h | 9 +++++++++
2 files changed, 37 insertions(+)
diff --git a/util.c b/util.c
index 799147a..73fb37e 100644
--- a/util.c
+++ b/util.c
@@ -69,6 +69,34 @@ const char *ev_str[] = {
"RS_PASSIVE",
};
+int addreq(enum transport_type type, struct address *a, struct address *b)
+{
+ void *bufa, *bufb;
+ int len;
+
+ switch (type) {
+ case TRANS_UDP_IPV4:
+ bufa = &a->sin.sin_addr;
+ bufb = &b->sin.sin_addr;
+ len = sizeof(a->sin);
+ break;
+ case TRANS_IEEE_802_3:
+ bufa = &a->sll.sll_addr;
+ bufb = &b->sll.sll_addr;
+ len = MAC_LEN;
+ break;
+ case TRANS_UDS:
+ case TRANS_UDP_IPV6:
+ case TRANS_DEVICENET:
+ case TRANS_CONTROLNET:
+ case TRANS_PROFINET:
+ default:
+ pr_err("sorry, cannot compare addresses for this transport");
+ return 0;
+ }
+ return memcmp(bufa, bufb, len) == 0 ? 1 : 0;
+}
+
char *bin2str_impl(Octet *data, int len, char *buf, int buf_len)
{
int i, offset = 0;
diff --git a/util.h b/util.h
index 4463b37..4becce1 100644
--- a/util.h
+++ b/util.h
@@ -41,6 +41,15 @@ extern const char *ps_str[];
*/
extern const char *ev_str[];
+/**
+ * Compares two binary addresses for equality.
+ * @param type One of the enumerated transport types.
+ * @param a One address to compare.
+ * @param b The second address to compare.
+ * @return One if the addresses are identical, zero otherwise.
+ */
+int addreq(enum transport_type type, struct address *a, struct address *b);
+
static inline uint16_t align16(uint16_t *p)
{
uint16_t v;
--
2.11.0
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