From a8b09ba5c0fdb5c80f20536bac194855edb21dad Mon Sep 17 00:00:00 2001 From: Maxime Bizon Date: Thu, 16 Jan 2020 01:05:59 +0100 Subject: [PATCH 12/18] pppd: remove mtu lowering when using MPPE create mismatch between announced MTU (1400) and effective (1396). --- pppd/ccp.c | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/pppd/ccp.c b/pppd/ccp.c index b522d31..56a6de0 100644 --- a/pppd/ccp.c +++ b/pppd/ccp.c @@ -1172,7 +1172,6 @@ ccp_reqci(f, p, lenp, dont_nak) MPPE_OPTS_TO_CI(ho->mppe, &p[2]); if (newret == CONFACK) { u_char opt_buf[CILEN_MPPE + MPPE_MAX_KEY_LEN]; - int mtu; BCOPY(p, opt_buf, CILEN_MPPE); BCOPY(mppe_send_key, &opt_buf[CILEN_MPPE], @@ -1185,16 +1184,6 @@ ccp_reqci(f, p, lenp, dont_nak) newret = CONFREJ; break; } - /* - * We need to decrease the interface MTU by MPPE_PAD - * because MPPE frames **grow**. The kernel [must] - * allocate MPPE_PAD extra bytes in xmit buffers. - */ - mtu = netif_get_mtu(f->unit); - if (mtu) - netif_set_mtu(f->unit, mtu - MPPE_PAD); - else - newret = CONFREJ; } /* -- 2.17.1