+/*
+ * dump_packet - print out a packet in readable form if it is interesting.
+ * Assumes len >= PPP_HDRLEN.
+ */
+void
+dump_packet(const char *tag, unsigned char *p, int len)
+{
+ int proto;
+
+ if (!debug)
+ return;
+
+ /*
+ * don't print LCP echo request/reply packets if debug <= 1
+ * and the link is up.
+ */
+ proto = (p[2] << 8) + p[3];
+ if (debug <= 1 && unsuccess == 0 && proto == PPP_LCP
+ && len >= PPP_HDRLEN + HEADERLEN) {
+ unsigned char *lcp = p + PPP_HDRLEN;
+ int l = (lcp[2] << 8) + lcp[3];
+
+ if ((lcp[0] == ECHOREQ || lcp[0] == ECHOREP)
+ && l >= HEADERLEN && l <= len - PPP_HDRLEN)
+ return;
+ }
+
+ dbglog("%s %P", tag, p, len);
+}
+