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Fixed checking input packet length (20 bytes is a valid packet and is used e.g. with MS RAS server)

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This commit is contained in:
goldsimon 2009-12-06 10:14:46 +00:00
parent 96e8f16c05
commit 5da0620c6b
1 changed files with 3 additions and 3 deletions
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6
src/netif/ppp/ppp_oe.c
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@ -398,7 +398,7 @@ pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
#endif #endif
struct pppoehdr *ph; struct pppoehdr *ph;
struct pppoetag pt; struct pppoetag pt;
int off = 0, err, errortag; int off, err, errortag;
struct eth_hdr *ethhdr; struct eth_hdr *ethhdr;
pb = pppSingleBuf(pb); pb = pppSingleBuf(pb);
@ -410,7 +410,7 @@ pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
goto done; goto done;
} }
ethhdr = (struct eth_hdr *)pb->payload; ethhdr = (struct eth_hdr *)pb->payload;
off += sizeof(*ethhdr); off = sizeof(*ethhdr);
ac_cookie = NULL; ac_cookie = NULL;
ac_cookie_len = 0; ac_cookie_len = 0;
@ -419,7 +419,7 @@ pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
hunique_len = 0; hunique_len = 0;
#endif #endif
session = 0; session = 0;
if (pb->len - off <= PPPOE_HEADERLEN) { if (pb->len - off < PPPOE_HEADERLEN) {
printf("pppoe: packet too short: %d\n", pb->len); printf("pppoe: packet too short: %d\n", pb->len);
goto done; goto done;
} }