From b2e6e1eb395f6c36fe0176c879f0dc667cd3c28d Mon Sep 17 00:00:00 2001
From: mickey <mickey@openbsd.org>
Date: Thu, 19 Dec 1996 13:45:16 +0000
Subject: [PATCH] sync to 2.3b3

---
 sys/net/if_ppp.c      | 23 ++++++++++++++---------
 sys/net/ppp-deflate.c | 12 ++++++++++--
 sys/net/ppp_defs.h    |  1 +
 3 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/sys/net/if_ppp.c b/sys/net/if_ppp.c
index f8997836756..893c482108b 100644
--- a/sys/net/if_ppp.c
+++ b/sys/net/if_ppp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_ppp.c,v 1.8 1996/07/25 14:20:50 joshd Exp $	*/
+/*	$OpenBSD: if_ppp.c,v 1.9 1996/12/19 13:45:16 mickey Exp $	*/
 /*	$NetBSD: if_ppp.c,v 1.31 1996/05/07 02:40:36 thorpej Exp $	*/
 
 /*
@@ -755,7 +755,7 @@ pppoutput(ifp, m0, dst, rtp)
 	}
 
 	/*
-	 * Update the time we sent the most recent packet.
+	 * Update the time we sent the most recent data packet.
 	 */
 	if (sc->sc_active_filt.bf_insns == 0
 	    || bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m0, len, 0))
@@ -930,8 +930,7 @@ ppp_dequeue(sc)
                     break;
                 ip = mtod(mp, struct ip *);
             }
-            /* this code assumes the IP/TCP header is in one non-shared
-mbuf */
+            /* this code assumes the IP/TCP header is in one non-shared mbuf */
             if (ip->ip_p == IPPROTO_TCP) {
                 type = sl_compress_tcp(mp, ip, sc->sc_comp,
                                        !(sc->sc_flags & SC_NO_TCP_CCID));
@@ -971,12 +970,18 @@ mbuf */
             slen += mp->m_len;
         clen = (*sc->sc_xcomp->compress)
             (sc->sc_xc_state, &mcomp, m, slen,
-             (sc->sc_flags & SC_CCP_UP? sc->sc_if.if_mtu: 0));
+             (sc->sc_flags & SC_CCP_UP? sc->sc_if.if_mtu + PPP_HDRLEN: 0));
         if (mcomp != NULL) {
-            m_freem(m);
-            m = mcomp;
-            cp = mtod(m, u_char *);
-            protocol = cp[3];
+            if (sc->sc_flags & SC_CCP_UP) {
+                /* Send the compressed packet instead of the original. */
+                m_freem(m);
+                m = mcomp;
+                cp = mtod(m, u_char *);
+                protocol = cp[3];
+            } else {
+                /* Can't transmit compressed packets until CCP is up. */
+                m_freem(mcomp);
+            }
         }       
     }
 #endif  /* PPP_COMPRESS */
diff --git a/sys/net/ppp-deflate.c b/sys/net/ppp-deflate.c
index 008714330a0..25bc385e9eb 100644
--- a/sys/net/ppp-deflate.c
+++ b/sys/net/ppp-deflate.c
@@ -531,7 +531,9 @@ z_decompress(arg, mi, mop)
     for (;;) {
 	r = inflate(&state->strm, flush);
 	if (r != Z_OK) {
+#ifndef DEFLATE_DEBUG
 	    if (state->debug)
+#endif
 		printf("z_decompress%d: inflate returned %d (%s)\n",
 		       state->unit, r, (state->strm.msg? state->strm.msg: ""));
 	    m_freem(mo_head);
@@ -578,6 +580,11 @@ z_decompress(arg, mi, mop)
 	return DECOMP_ERROR;
     }
     olen += (mo->m_len = ospace - state->strm.avail_out);
+#ifdef DEFLATE_DEBUG
+    if (olen > state->mru + PPP_HDRLEN)
+        printf("ppp_deflate%d: exceeded mru (%d > %d)\n",
+               state->unit, olen, state->mru + PPP_HDRLEN);
+#endif
 
     state->stats.unc_bytes += olen;
     state->stats.unc_packets++;
@@ -627,10 +634,11 @@ z_incomp(arg, mi)
 	r = inflateIncomp(&state->strm);
 	if (r != Z_OK) {
 	    /* gak! */
-	    if (state->debug) {
+#ifndef DEFLATE_DEBUG
+	    if (state->debug)
+#endif
 		printf("z_incomp%d: inflateIncomp returned %d (%s)\n",
 		       state->unit, r, (state->strm.msg? state->strm.msg: ""));
-	    }
 	    return;
 	}
 	mi = mi->m_next;
diff --git a/sys/net/ppp_defs.h b/sys/net/ppp_defs.h
index b5fc672a34e..9be5a9d28b4 100644
--- a/sys/net/ppp_defs.h
+++ b/sys/net/ppp_defs.h
@@ -65,6 +65,7 @@
 #define PPP_PAP		0xc023	/* Password Authentication Protocol */
 #define PPP_LQR		0xc025	/* Link Quality Report protocol */
 #define PPP_CHAP	0xc223	/* Cryptographic Handshake Auth. Protocol */
+#define PPP_CBCP	0xc029	/* Callback Control Protocol */
 
 /*
  * Values for FCS calculations.
-- 
2.20.1