static long
ipwrite(Chan *ch, void *a, long n, vlong off)
{
Conv *c;
Proto *x;
char *p;
Cmdbuf *cb;
Fs *f;
f = ipfs[ch->dev];
switch(TYPE(ch->qid)) {
default:
error(Eperm);
case Qdata:
x = f->p[PROTO(ch->qid)];
c = x->conv[CONV(ch->qid)];
if(c->sfd < 0)
error(Ehungup);
qlock(&c->wlock);
if(waserror()){
qunlock(&c->wlock);
nexterror();
}
if(c->headers) {
if(n < c->headers)
error(Eshort);
p = a;
n = so_send(c->sfd, p + c->headers, n - c->headers, p, c->headers);
if(n >= 0)
n += c->headers;
} else
n = so_send(c->sfd, a, n, nil, 0);
poperror();
qunlock(&c->wlock);
if(n < 0)
oserror();
break;
case Qarp:
return arpwrite(a, n);
case Qndb:
if(off > strlen(f->ndb))
error(Eio);
if(off+n >= sizeof(f->ndb)-1)
error(Eio);
memmove(f->ndb+off, a, n);
f->ndb[off+n] = 0;
f->ndbvers++;
f->ndbmtime = seconds();
break;
case Qctl:
x = f->p[PROTO(ch->qid)];
c = x->conv[CONV(ch->qid)];
cb = parsecmd(a, n);
qlock(&c->l);
if(waserror()){
qunlock(&c->l);
free(cb);
nexterror();
}
if(cb->nf < 1)
error("short control request");
if(strcmp(cb->f[0], "connect") == 0)
connectctlmsg(x, c, cb);
else if(strcmp(cb->f[0], "announce") == 0)
announcectlmsg(x, c, cb);
else if(strcmp(cb->f[0], "bind") == 0)
bindctlmsg(x, c, cb);
else if(strcmp(cb->f[0], "ttl") == 0){
/* ignored */
} else if(strcmp(cb->f[0], "tos") == 0){
/* ignored */
} else if(strcmp(cb->f[0], "ignoreadvice") == 0){
/* ignored */
} else if(strcmp(cb->f[0], "headers4") == 0){
if(c->p->stype != S_UDP)
error(Enoctl);
c->headers = OUdphdrlenv4;
} else if(strcmp(cb->f[0], "oldheaders") == 0){
if(c->p->stype != S_UDP)
error(Enoctl);
c->headers = OUdphdrlen;
} else if(strcmp(cb->f[0], "headers") == 0){
if(c->p->stype != S_UDP)
error(Enoctl);
c->headers = Udphdrlen;
} else if(strcmp(cb->f[0], "hangup") == 0){
if(c->p->stype != S_TCP)
error(Enoctl);
qunlock(&c->l);
if(waserror()){
qlock(&c->l);
nexterror();
}
/* TO DO: check fd status if socket close/hangup interrupted */
if(c->sfd >= 0 && so_hangup(c->sfd, 1) < 0)
oserror();
qlock(&c->l);
poperror();
c->sfd = -1;
c->state = Hungup;
} else if(strcmp(cb->f[0], "keepalive") == 0){
if(c->p->stype != S_TCP)
error(Enoctl);
if(c->sfd < 0)
error("not connected");
so_keepalive(c->sfd, cb->nf>1? atoi(cb->f[1]): 0);
} else
error(Enoctl);
poperror();
qunlock(&c->l);
free(cb);
break;
}
return n;
}
static long
ipwrite(Chan* ch, void *v, long n, vlong off)
{
Conv *c;
Proto *x;
char *p;
Cmdbuf *cb;
uchar ia[IPaddrlen], ma[IPaddrlen];
Fs *f;
char *a;
ulong offset = off;
a = v;
f = ipfs[ch->dev];
switch(TYPE(ch->qid)){
default:
error(Eperm);
case Qdata:
x = f->p[PROTO(ch->qid)];
c = x->conv[CONV(ch->qid)];
if(c->wq == nil)
error(Eperm);
qwrite(c->wq, a, n);
break;
case Qarp:
return arpwrite(f, a, n);
case Qiproute:
return routewrite(f, ch, a, n);
case Qlog:
netlogctl(f, a, n);
return n;
case Qndb:
return ndbwrite(f, a, offset, n);
break;
case Qctl:
x = f->p[PROTO(ch->qid)];
c = x->conv[CONV(ch->qid)];
cb = parsecmd(a, n);
qlock(c);
if(waserror()) {
qunlock(c);
free(cb);
nexterror();
}
if(cb->nf < 1)
error("short control request");
if(strcmp(cb->f[0], "connect") == 0)
connectctlmsg(x, c, cb);
else if(strcmp(cb->f[0], "announce") == 0)
announcectlmsg(x, c, cb);
else if(strcmp(cb->f[0], "bind") == 0)
bindctlmsg(x, c, cb);
else if(strcmp(cb->f[0], "ttl") == 0)
ttlctlmsg(c, cb);
else if(strcmp(cb->f[0], "tos") == 0)
tosctlmsg(c, cb);
else if(strcmp(cb->f[0], "ignoreadvice") == 0)
c->ignoreadvice = 1;
else if(strcmp(cb->f[0], "addmulti") == 0){
if(cb->nf < 2)
error("addmulti needs interface address");
if(cb->nf == 2){
if(!ipismulticast(c->raddr))
error("addmulti for a non multicast address");
if (parseip(ia, cb->f[1]) == -1)
error(Ebadip);
ipifcaddmulti(c, c->raddr, ia);
} else {
if (parseip(ia, cb->f[1]) == -1 ||
parseip(ma, cb->f[2]) == -1)
error(Ebadip);
if(!ipismulticast(ma))
error("addmulti for a non multicast address");
ipifcaddmulti(c, ma, ia);
}
} else if(strcmp(cb->f[0], "remmulti") == 0){
if(cb->nf < 2)
error("remmulti needs interface address");
if(!ipismulticast(c->raddr))
error("remmulti for a non multicast address");
if (parseip(ia, cb->f[1]) == -1)
error(Ebadip);
ipifcremmulti(c, c->raddr, ia);
} else if(strcmp(cb->f[0], "maxfragsize") == 0){
if(cb->nf < 2)
error("maxfragsize needs size");
c->maxfragsize = (int)strtol(cb->f[1], nil, 0);
} else if(x->ctl != nil) {
p = x->ctl(c, cb->f, cb->nf);
if(p != nil)
error(p);
} else
error("unknown control request");
qunlock(c);
free(cb);
poperror();
}
return n;
}