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ensure MRU is sane

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This commit is contained in:
Brendan O'Dea 2005-11-17 05:24:17 +00:00
parent e1f961edee
commit 6c71960bcf
1 changed files with 13 additions and 2 deletions
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15
ppp.c
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@ -1,6 +1,6 @@
// L2TPNS PPP Stuff // L2TPNS PPP Stuff
char const *cvs_id_ppp = "$Id: ppp.c,v 1.85 2005-11-04 14:41:50 bodea Exp $"; char const *cvs_id_ppp = "$Id: ppp.c,v 1.86 2005-11-17 05:24:17 bodea Exp $";
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
@ -575,7 +575,18 @@ void processlcp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
switch (type) switch (type)
{ {
case 1: // Maximum-Receive-Unit case 1: // Maximum-Receive-Unit
session[s].mru = ntohs(*(uint16_t *)(o + 2)); {
uint16_t mru = ntohs(*(uint16_t *)(o + 2));
if (mru >= 576)
{
session[s].mru = mru;
break;
}
LOG(3, s, t, " Remote requesting MRU of %u. Rejecting.\n", mru);
mru = htons(MRU);
q = ppp_conf_nak(s, b, sizeof(b), PPPLCP, &response, q, p, o, (uint8_t *) &mru, sizeof(mru));
}
break; break;
case 2: // Async-Control-Character-Map case 2: // Async-Control-Character-Map