X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/b38f324af9dd953a661b9f35910f8c6d8eb2cc06..69ead2a09cf7d0666c6a7ac12e47fd9743242c61:/print-ppi.c?ds=inline

diff --git a/print-ppi.c b/print-ppi.c
index cb8f3b95..72cd1b86 100644
--- a/print-ppi.c
+++ b/print-ppi.c
@@ -30,18 +30,20 @@ ppi_header_print(netdissect_options *ndo, const u_char *bp, u_int length)
 	const ppi_header_t *hdr;
 	uint16_t len;
 	uint32_t dlt;
+	const char *dltname;
 
 	hdr = (const ppi_header_t *)bp;
 
 	len = EXTRACT_LE_16BITS(&hdr->ppi_len);
 	dlt = EXTRACT_LE_32BITS(&hdr->ppi_dlt);
+	dltname = pcap_datalink_val_to_name(dlt);
 
 	if (!ndo->ndo_qflag) {
 		ND_PRINT((ndo, "V.%d DLT %s (%d) len %d", hdr->ppi_ver,
-			  pcap_datalink_val_to_name(dlt), dlt,
+			  (dltname != NULL ? dltname : "UNKNOWN"), dlt,
                           len));
         } else {
-		ND_PRINT((ndo, "%s", pcap_datalink_val_to_name(dlt)));
+		ND_PRINT((ndo, "%s", (dltname != NULL ? dltname : "UNKNOWN")));
         }
 
 	ND_PRINT((ndo, ", length %u: ", length));