+ ccp_options *go = &ccp_gotoptions[f->unit];
+ u_char opt_buf[16];
+
+ *go = ccp_wantoptions[f->unit];
+ all_rejected[f->unit] = 0;
+
+ /*
+ * Check whether the kernel knows about the various
+ * compression methods we might request.
+ */
+ if (go->bsd_compress) {
+ opt_buf[0] = CI_BSD_COMPRESS;
+ opt_buf[1] = CILEN_BSD_COMPRESS;
+ opt_buf[2] = BSD_MAKE_OPT(BSD_CURRENT_VERSION, BSD_MIN_BITS);
+ if (ccp_test(f->unit, opt_buf, CILEN_BSD_COMPRESS, 0) <= 0)
+ go->bsd_compress = 0;
+ }
+ if (go->deflate) {
+ opt_buf[0] = CI_DEFLATE;
+ opt_buf[1] = CILEN_DEFLATE;
+ opt_buf[2] = DEFLATE_MAKE_OPT(DEFLATE_MIN_SIZE);
+ opt_buf[3] = DEFLATE_CHK_SEQUENCE;
+ if (ccp_test(f->unit, opt_buf, CILEN_DEFLATE, 0) <= 0)
+ go->deflate = 0;
+ }
+ if (go->predictor_1) {
+ opt_buf[0] = CI_PREDICTOR_1;
+ opt_buf[1] = CILEN_PREDICTOR_1;
+ if (ccp_test(f->unit, opt_buf, CILEN_PREDICTOR_1, 0) <= 0)
+ go->predictor_1 = 0;
+ }
+ if (go->predictor_2) {
+ opt_buf[0] = CI_PREDICTOR_2;
+ opt_buf[1] = CILEN_PREDICTOR_2;
+ if (ccp_test(f->unit, opt_buf, CILEN_PREDICTOR_2, 0) <= 0)
+ go->predictor_2 = 0;
+ }