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gprs_ns2: fix check of MTU changes for frame relay 

The frame relay needs 2 byte for data packets.

Related: OS#5192
Change-Id: I02d4e81896a473aeb79ea2f2983e12324244048f
This commit is contained in:
Alexander Couzens 2021-07-02 16:23:06 +02:00
parent db7b2ab36b
commit a6096ad367
1 changed files with 7 additions and 3 deletions
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10
src/gb/gprs_ns2_fr.c
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@ -601,14 +601,18 @@ static void mtu_change(struct gprs_ns2_vc_bind *bind, uint32_t mtu)
struct priv_bind *bpriv = bind->priv;
struct gprs_ns2_nse *nse;
/* 2 byte DLCI header */
if (mtu <= 2)
return;
mtu -= 2;
if (mtu == bind->mtu)
return;
LOGBIND(bind, LOGL_INFO, "MTU changed from %d to %d.\n",
bind->mtu, mtu);
bind->mtu + 2, mtu + 2);
/* 2 byte DLCI header */
bind->mtu = mtu - 2;
bind->mtu = mtu;
if (!bpriv->if_running)
return;