devip: various icmp stuff
no need to rlock ifc in targetttype() as we are called from icmpiput6(), which the ifc rlocked. for icmpadvise, the lport, destination *AND* source have to match. a connection gets a packet when the packets destination matches the source *OR* the packets source matches the destination.
This commit is contained in:
cinap_lenrek
parent
575398eb9b
commit
26aca332bb
2 changed files with 39 additions and 49 deletions
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@ -288,22 +288,20 @@ icmpcantfrag(Fs *f, Block *bp, int mtu)
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static void
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goticmpkt(Proto *icmp, Block *bp)
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{
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ushort recid;
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uchar dst[IPaddrlen], src[IPaddrlen];
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Conv **c, *s;
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Icmp *p;
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uchar dst[IPaddrlen];
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ushort recid;
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p = (Icmp *) bp->rp;
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v4tov6(dst, p->src);
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v4tov6(dst, p->dst);
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v4tov6(src, p->src);
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recid = nhgets(p->icmpid);
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for(c = icmp->conv; *c; c++) {
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s = *c;
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for(c = icmp->conv; (s = *c) != nil; c++){
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if(s->lport == recid)
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if(ipcmp(s->raddr, dst) == 0){
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qpass(s->rq, concatblock(bp));
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return;
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}
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if(ipcmp(s->laddr, dst) == 0 || ipcmp(s->raddr, src) == 0)
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qpass(s->rq, copyblock(bp, blocklen(bp)));
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}
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freeblist(bp);
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}
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@ -317,6 +315,7 @@ mkechoreply(Block *bp, Fs *f)
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q = (Icmp *)bp->rp;
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if(!ip4me(f, q->dst) || !ip4reply(f, q->src))
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return nil;
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q->vihl = IP_VER4;
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memmove(ip, q->src, sizeof(q->dst));
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memmove(q->src, q->dst, sizeof(q->src));
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@ -392,9 +391,9 @@ icmpiput(Proto *icmp, Ipifc*, Block *bp)
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switch(p->type) {
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case EchoRequest:
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if (iplen < n)
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if(iplen < n)
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bp = trimblock(bp, 0, iplen);
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if(bp->next)
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if(bp->next != nil)
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bp = concatblock(bp);
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r = mkechoreply(bp, icmp->f);
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if(r == nil)
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@ -458,18 +457,19 @@ raise:
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static void
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icmpadvise(Proto *icmp, Block *bp, char *msg)
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{
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ushort recid;
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uchar dst[IPaddrlen], src[IPaddrlen];
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Conv **c, *s;
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Icmp *p;
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uchar dst[IPaddrlen];
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ushort recid;
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p = (Icmp *) bp->rp;
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v4tov6(dst, p->dst);
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v4tov6(src, p->src);
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recid = nhgets(p->icmpid);
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for(c = icmp->conv; *c; c++) {
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s = *c;
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for(c = icmp->conv; (s = *c) != nil; c++){
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if(s->lport == recid)
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if(ipcmp(s->laddr, src) == 0)
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if(ipcmp(s->raddr, dst) == 0){
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if(s->ignoreadvice)
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break;
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@ -494,7 +494,7 @@ icmpstats(Proto *icmp, char *buf, int len)
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for(i = 0; i < Nstats; i++)
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p = seprint(p, e, "%s: %lud\n", statnames[i], priv->stats[i]);
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for(i = 0; i <= Maxtype; i++){
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if(icmpnames[i])
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if(icmpnames[i] != nil)
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p = seprint(p, e, "%s: %lud %lud\n", icmpnames[i], priv->in[i], priv->out[i]);
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else
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p = seprint(p, e, "%d: %lud %lud\n", i, priv->in[i], priv->out[i]);
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@ -221,10 +221,10 @@ icmpadvise6(Proto *icmp, Block *bp, char *msg)
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p = (IPICMP *)bp->rp;
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recid = nhgets(p->icmpid);
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for(c = icmp->conv; *c; c++) {
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s = *c;
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for(c = icmp->conv; (s = *c) != nil; c++){
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if(s->lport == recid)
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if(ipcmp(s->laddr, p->dst) == 0 || ipcmp(s->raddr, p->dst) == 0){
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if(ipcmp(s->laddr, p->src) == 0)
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if(ipcmp(s->raddr, p->dst) == 0){
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if(s->ignoreadvice)
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break;
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qhangup(s->rq, msg);
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@ -309,19 +309,11 @@ goticmpkt6(Proto *icmp, Block *bp, int muxkey)
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recid = muxkey;
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addr = p->dst;
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}
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for(c = icmp->conv; *c; c++){
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s = *c;
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if(s->lport != recid)
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continue;
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if(ipcmp(s->laddr, addr) == 0){
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qpass(s->rq, concatblock(bp));
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return;
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}
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if(ipcmp(s->raddr, addr) == 0)
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for(c = icmp->conv; (s = *c) != nil; c++){
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if(s->lport == recid)
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if(ipcmp(s->laddr, p->dst) == 0 || ipcmp(s->raddr, addr) == 0)
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qpass(s->rq, copyblock(bp, blocklen(bp)));
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}
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freeblist(bp);
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}
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@ -417,7 +409,7 @@ icmpna(Fs *f, uchar* src, uchar* dst, uchar* targ, uchar* mac, uchar flags)
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memmove(np->lnaddr, mac, sizeof(np->lnaddr));
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set_cksum(nbp);
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np = (Ndpkt*) nbp->rp;
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np = (Ndpkt*)nbp->rp;
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np->ttl = HOP_LIMIT;
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np->vcf[0] = 0x06 << 4;
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ipriv->out[NbrAdvert]++;
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@ -673,24 +665,22 @@ targettype(Fs *f, Ipifc *ifc, uchar *target)
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Iplifc *lifc;
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int t;
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rlock(ifc);
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if((lifc = iplocalonifc(ifc, target)) != nil)
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t = lifc->tentative? Tunitent: Tunirany;
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else if(ipproxyifc(f, ifc, target))
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t = Tuniproxy;
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else
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t = 0;
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runlock(ifc);
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return t;
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}
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static void
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icmpiput6(Proto *icmp, Ipifc *ipifc, Block *bp)
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icmpiput6(Proto *icmp, Ipifc *ifc, Block *bp)
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{
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char *msg, m2[128];
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uchar pktflags;
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uchar *packet = bp->rp;
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uchar lsrc[IPaddrlen];
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uchar ia[IPaddrlen];
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Block *r;
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IPICMP *p = (IPICMP *)packet;
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Icmppriv6 *ipriv = icmp->priv;
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@ -698,16 +688,16 @@ icmpiput6(Proto *icmp, Ipifc *ipifc, Block *bp)
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Ndpkt* np;
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Proto *pr;
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if(!valid(icmp, ipifc, bp, ipriv) || p->type > Maxtype6)
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if(!valid(icmp, ifc, bp, ipriv) || p->type > Maxtype6)
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goto raise;
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ipriv->in[p->type]++;
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switch(p->type) {
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case EchoRequestV6:
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if(bp->next)
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if(bp->next != nil)
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bp = concatblock(bp);
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r = mkechoreply6(bp, ipifc);
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r = mkechoreply6(bp, ifc);
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if(r == nil)
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goto raise;
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ipriv->out[EchoReply]++;
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@ -747,7 +737,7 @@ icmpiput6(Proto *icmp, Ipifc *ipifc, Block *bp)
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}
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p = (IPICMP *)bp->rp;
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pr = Fsrcvpcolx(icmp->f, p->proto);
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if(pr && pr->advise) {
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if(pr != nil && pr->advise != nil) {
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(*pr->advise)(pr, bp, m2);
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return;
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}
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@ -764,21 +754,21 @@ icmpiput6(Proto *icmp, Ipifc *ipifc, Block *bp)
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case NbrSolicit:
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np = (Ndpkt*) p;
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pktflags = 0;
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if(ipifc->sendra6)
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if(ifc->sendra6)
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pktflags |= Rflag;
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switch (targettype(icmp->f, ipifc, np->target)) {
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switch (targettype(icmp->f, ifc, np->target)) {
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case Tunirany:
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pktflags |= Oflag;
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/* fall through */
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case Tuniproxy:
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if(ipv6local(ipifc, lsrc, np->src)) {
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arpenter(icmp->f, V6, np->src, np->lnaddr, 8*np->olen-2, lsrc, 0);
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if(ipv6local(ifc, ia, np->src)) {
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arpenter(icmp->f, V6, np->src, np->lnaddr, 8*np->olen-2, ia, 0);
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pktflags |= Sflag;
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} else
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ipmove(lsrc, np->target);
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icmpna(icmp->f, lsrc, (pktflags & Sflag) ? np->src : v6allnodesL,
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np->target, ipifc->mac, pktflags);
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ipmove(ia, np->target);
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icmpna(icmp->f, ia, (pktflags & Sflag)? np->src: v6allnodesL,
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np->target, ifc->mac, pktflags);
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break;
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case Tunitent:
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/*
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@ -800,11 +790,11 @@ icmpiput6(Proto *icmp, Ipifc *ipifc, Block *bp)
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* detection part of ipconfig can discover duplication through
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* the arp table.
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*/
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lifc = iplocalonifc(ipifc, np->target);
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lifc = iplocalonifc(ifc, np->target);
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if(lifc != nil && lifc->tentative)
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arpenter(icmp->f, V6, np->target, np->lnaddr, 8*np->olen-2, np->target, 0);
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else if(ipv6local(ipifc, lsrc, np->target))
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arpenter(icmp->f, V6, np->target, np->lnaddr, 8*np->olen-2, lsrc, 1);
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else if(ipv6local(ifc, ia, np->target))
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arpenter(icmp->f, V6, np->target, np->lnaddr, 8*np->olen-2, ia, 1);
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freeblist(bp);
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break;
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