X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/b7b72b7c6335fb22b712688b144a538be4ae96e9..c518a9aab149da1a6b83c0cbeddaff5265d05dcb:/netdissect.c

diff --git a/netdissect.c b/netdissect.c
index 15594de8..7e46d6aa 100644
--- a/netdissect.c
+++ b/netdissect.c
@@ -123,14 +123,14 @@ nd_load_smi_module(const char *module, char *errbuf, size_t errbuf_size)
 {
 #ifdef USE_LIBSMI
 	if (smiLoadModule(module) == 0) {
-		nd_snprintf(errbuf, errbuf_size, "could not load MIB module %s",
+		snprintf(errbuf, errbuf_size, "could not load MIB module %s",
 		    module);
 		return (-1);
 	}
 	nd_smi_module_loaded = 1;
 	return (0);
 #else
-	nd_snprintf(errbuf, errbuf_size, "MIB module %s not loaded: no libsmi support",
+	snprintf(errbuf, errbuf_size, "MIB module %s not loaded: no libsmi support",
 	    module);
 	return (-1);
 #endif
@@ -193,6 +193,27 @@ nd_push_snapend(netdissect_options *ndo, const u_char *new_snapend)
 	return (1);	/* success */
 }
 
+/*
+ * Change an already-pushed snapshot end.  This may increase the
+ * snapshot end, as it may be used, for example, for a Jumbo Payload
+ * option in IPv6.  It must not increase it past the snapshot length
+ * atop which the current one was pushed, however.
+ */
+void
+nd_change_snapend(netdissect_options *ndo, const u_char *new_snapend)
+{
+	struct netdissect_saved_packet_info *ndspi;
+
+	ndspi = ndo->ndo_packet_info_stack;
+	if (ndspi->ndspi_prev != NULL) {
+		if (new_snapend <= ndspi->ndspi_prev->ndspi_snapend)
+			ndo->ndo_snapend = new_snapend;
+	} else {
+		if (new_snapend < ndo->ndo_snapend)
+			ndo->ndo_snapend = new_snapend;
+	}
+}
+
 void
 nd_pop_packet_info(netdissect_options *ndo)
 {