[PATCH libnetfilter_log 2/2] utils: nfulnl_test: Add rather extensive test of nflog_get_packet_hw()

[Duncan Roe <duncan_roe@optusnet.com.au>]

Wasn't expecting length in NBO, so code caters for it being either way

Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
---
 utils/nfulnl_test.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/utils/nfulnl_test.c b/utils/nfulnl_test.c
index 237adc3..a07c100 100644
--- a/utils/nfulnl_test.c
+++ b/utils/nfulnl_test.c
@@ -15,6 +15,31 @@ static int print_pkt(struct nflog_data *nfad)
 	char *prefix = nflog_get_prefix(nfad);
 	char *payload;
 	int payload_len = nflog_get_payload(nfad, &payload);
+	struct nfulnl_msg_packet_hw *hw = nflog_get_packet_hw(nfad);
+
+	if (!hw)
+		puts("No struct nfulnl_msg_packet_hw returned");
+	else {
+		char *p = "";
+		int i;
+
+		if (hw->hw_addrlen > sizeof hw->hw_addr) {
+			i = htons(hw->hw_addrlen);
+			if (i <= sizeof hw->hw_addr) {
+				hw->hw_addrlen = i;
+				p = " (after htons)";
+			}
+		}
+		printf("hw_addrlen = %d%s\n", hw->hw_addrlen, p);
+		if (i && i <= sizeof hw->hw_addr) {
+			uint8_t *u = hw->hw_addr;
+
+			fputs("HW addr: ", stdout);
+			for (i--; i >=0; i--, u++)
+				printf("%02x%s", *u, i ? ":" : "");
+			puts("");
+		}
+	}
 
 	if (ph) {
 		printf("hw_protocol=0x%04x hook=%u ",
-- 
2.17.5