+ putq(q, mp);
+ break;
+
+ case M_IOCTL:
+ iop = (struct iocblk *) mp->b_rptr;
+ error = EINVAL;
+ switch (iop->ioc_cmd) {
+
+ case PPPIO_CFLAGS:
+ /* set/get CCP state */
+ if (iop->ioc_count != 2 * sizeof(int))
+ break;
+ flags = ((int *) mp->b_cont->b_rptr)[0];
+ mask = ((int *) mp->b_cont->b_rptr)[1];
+ cp->flags = (cp->flags & ~mask) | (flags & mask);
+ if ((mask & CCP_ISOPEN) && (flags & CCP_ISOPEN) == 0) {
+ if (cp->xstate != NULL) {
+ (*cp->xcomp->comp_free)(cp->xstate);
+ cp->xstate = NULL;
+ }
+ if (cp->rstate != NULL) {
+ (*cp->rcomp->decomp_free)(cp->rstate);
+ cp->rstate = NULL;
+ }
+ cp->flags &= ~CCP_ISUP;
+ }
+ error = 0;
+ iop->ioc_count = sizeof(int);
+ ((int *) mp->b_cont->b_rptr)[0] = cp->flags;
+ mp->b_cont->b_wptr = mp->b_cont->b_rptr + sizeof(int);
+ break;
+
+ case PPPIO_VJINIT:
+ /*
+ * Initialize VJ compressor/decompressor
+ */
+ if (iop->ioc_count != 2)
+ break;
+ nxslots = mp->b_cont->b_rptr[0] + 1;
+ nrslots = mp->b_cont->b_rptr[1] + 1;
+ if (nxslots > MAX_STATES || nrslots > MAX_STATES)
+ break;
+ vj_compress_init(&cp->vj_comp, nxslots);
+ cp->vj_last_ierrors = cp->ierrors;
+ error = 0;
+ iop->ioc_count = 0;
+ break;
+
+ case PPPIO_XCOMP:
+ case PPPIO_RCOMP:
+ if (iop->ioc_count <= 0)
+ break;
+ opt_data = mp->b_cont->b_rptr;
+ len = mp->b_cont->b_wptr - opt_data;
+ if (len > iop->ioc_count)
+ len = iop->ioc_count;
+ if (opt_data[1] < 2 || opt_data[1] > len)
+ break;
+ for (comp = ppp_compressors; *comp != NULL; ++comp)
+ if ((*comp)->compress_proto == opt_data[0]) {
+ /* here's the handler! */
+ error = 0;
+ if (iop->ioc_cmd == PPPIO_XCOMP) {
+ if (cp->xstate != NULL)
+ (*cp->xcomp->comp_free)(cp->xstate);
+ cp->xcomp = *comp;
+ cp->xstate = (*comp)->comp_alloc(opt_data, len);
+ if (cp->xstate == NULL)
+ error = ENOSR;
+ } else {
+ if (cp->rstate != NULL)
+ (*cp->rcomp->decomp_free)(cp->rstate);
+ cp->rcomp = *comp;
+ cp->rstate = (*comp)->decomp_alloc(opt_data, len);
+ if (cp->rstate == NULL)
+ error = ENOSR;
+ }
+ break;
+ }
+ iop->ioc_count = 0;
+ break;
+
+ case PPPIO_MRU:
+ /* remember this value */
+ if (iop->ioc_count == sizeof(int)) {
+ cp->mru = *(int *) mp->b_cont->b_rptr;
+ }
+ error = -1;
+ break;
+
+ default:
+ error = -1;
+ break;
+ }
+
+ if (error < 0)
+ putnext(q, mp);
+ else if (error == 0) {
+ mp->b_datap->db_type = M_IOCACK;
+ qreply(q, mp);
+ } else {
+ mp->b_datap->db_type = M_IOCNAK;
+ iop->ioc_error = error;
+ iop->ioc_count = 0;
+ qreply(q, mp);
+ }
+ break;
+
+ case M_CTL:
+ switch (*mp->b_rptr) {
+ case PPPCTL_MTU:
+ cp->mtu = ((unsigned short *)mp->b_rptr)[1];
+ break;
+ case PPPCTL_MRU:
+ cp->mru = ((unsigned short *)mp->b_rptr)[1];
+ break;
+ case PPPCTL_UNIT:
+ cp->unit = mp->b_rptr[1];
+ break;
+ }
+ putnext(q, mp);
+ break;
+
+ default:
+ putnext(q, mp);
+ }
+}
+
+static int
+ppp_comp_wsrv(q)
+ queue_t *q;
+{
+ mblk_t *mp, *cmp;
+ struct ppp_comp_state *cp;
+ int len, proto, type;
+ struct ip *ip;
+ unsigned char *vjhdr, *dp;
+
+ cp = (struct ppp_comp_state *) q->q_ptr;
+ while ((mp = getq(q)) != 0) {
+ /* assert(mp->b_datap->db_type == M_DATA) */
+ if (!canputnext(q)) {
+ putbq(q, mp);
+ return;
+ }
+