diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2019-03-07 01:25:11 +0100 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2019-03-07 01:25:11 +0100 |
| commit | 4885c75526f91ff9eb245b32a63512e2e67b3038 (patch) | |
| tree | 72245162aa01144cbcdb797c977d50f66db345d5 /sys/src/9/ip/icmp.c | |
| parent | 88e054ffdfed8fd229b00d4f6311aefdb769cf0d (diff) | |
devip: ignore icmp advise about laggard fragments
icmp has to advise protocols about the first
fragment only. all other fragments should be
ignored.
Diffstat (limited to 'sys/src/9/ip/icmp.c')
| -rw-r--r-- | sys/src/9/ip/icmp.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/sys/src/9/ip/icmp.c b/sys/src/9/ip/icmp.c index 51f041b38..90c289f4b 100644 --- a/sys/src/9/ip/icmp.c +++ b/sys/src/9/ip/icmp.c @@ -401,10 +401,12 @@ icmpiput(Proto *icmp, Ipifc*, Block *bp) goto raise; } p = (Icmp *)bp->rp; - pr = Fsrcvpcolx(icmp->f, p->proto); - if(pr != nil && pr->advise != nil) { - (*pr->advise)(pr, bp, msg); - return; + if((nhgets(p->frag) & ~(IP_DF|IP_MF)) == 0){ + pr = Fsrcvpcolx(icmp->f, p->proto); + if(pr != nil && pr->advise != nil) { + (*pr->advise)(pr, bp, msg); + return; + } } bp->rp -= ICMP_IPSIZE+ICMP_HDRSIZE; goticmpkt(icmp, bp); |