From f6d23e153eba65167e8a7c3732fec50ff1d69ea2 Mon Sep 17 00:00:00 2001
From: Denis Kenzior <denkenz@gmail.com>
Date: Tue, 6 Apr 2010 17:24:04 -0500
Subject: [PATCH] ppp: Implement receive ACCM

---
 gatchat/gatppp.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/gatchat/gatppp.c b/gatchat/gatppp.c
index c1abbec3..ebba0ca2 100644
--- a/gatchat/gatppp.c
+++ b/gatchat/gatppp.c
@@ -288,8 +288,14 @@ static struct frame_buffer *ppp_decode(GAtPPP *ppp, guint8 *frame)
 	fcs = PPPINITFCS16;
 	i = 0;
 
-	/* TBD - how to deal with recv_accm */
 	while (frame[pos] != PPP_FLAG_SEQ) {
+		/* Skip the characters in receive ACCM */
+		if (frame[pos] < 0x20 &&
+				(ppp->recv_accm & (1 << frame[pos])) != 0) {
+			pos++;
+			continue;
+		}
+
 		/* scan for escape character */
 		if (frame[pos] == PPP_ESC) {
 			/* skip that char */
@@ -640,7 +646,7 @@ GAtPPP *g_at_ppp_new(GIOChannel *modem)
 
 	/* set options to defaults */
 	ppp->mru = DEFAULT_MRU;
-	ppp->recv_accm = DEFAULT_ACCM;
+	ppp->recv_accm = ~0U;
 	ppp->xmit_accm[0] = DEFAULT_ACCM;
 	ppp->xmit_accm[3] = 0x60000000; /* 0x7d, 0x7e */
 	ppp->pfc = FALSE;