ccp_addci(): Restore behavior of only testing kernel support for the first

[ppp.git] / pppd / ccp.c

diff --git a/pppd/ccp.c b/pppd/ccp.c
index 54fc743e2a702fdc68051d2f25335c185ff6186f..378749e1a6463c43ea01592fbaaa3cb2f56c32f6 100644 (file)
--- a/pppd/ccp.c
+++ b/pppd/ccp.c
@@ -25,7 +25,7 @@
  * OR MODIFICATIONS.
  */
 
-#define RCSID  "$Id: ccp.c,v 1.39 2002/09/01 12:00:15 dfs Exp $"
+#define RCSID  "$Id: ccp.c,v 1.40 2002/10/27 11:46:24 fcusack Exp $"
 
 #include <stdlib.h>
 #include <string.h>
@@ -686,7 +686,8 @@ ccp_addci(f, p, lenp)
 
     /*
      * Add the compression types that we can receive, in decreasing
-     * preference order.
+     * preference order.  Get the kernel to allocate the first one
+     * in case it gets Acked.
      */
 #ifdef MPPE
     if (go->mppe) {
@@ -738,21 +739,25 @@ ccp_addci(f, p, lenp)
        p[0] = CI_BSD_COMPRESS;
        p[1] = CILEN_BSD_COMPRESS;
        p[2] = BSD_MAKE_OPT(BSD_CURRENT_VERSION, go->bsd_bits);
-       for (;;) {
-           if (go->bsd_bits < BSD_MIN_BITS) {
-               go->bsd_compress = 0;
-               break;
-           }
-           res = ccp_test(f->unit, p, CILEN_BSD_COMPRESS, 0);
-           if (res > 0) {
-               p += CILEN_BSD_COMPRESS;
-               break;
-           } else if (res < 0) {
-               go->bsd_compress = 0;
-               break;
+       if (p != p0) {
+           p += CILEN_BSD_COMPRESS;    /* not the first option */
+       } else {
+           for (;;) {
+               if (go->bsd_bits < BSD_MIN_BITS) {
+                   go->bsd_compress = 0;
+                   break;
+               }
+               res = ccp_test(f->unit, p, CILEN_BSD_COMPRESS, 0);
+               if (res > 0) {
+                   p += CILEN_BSD_COMPRESS;
+                   break;
+               } else if (res < 0) {
+                   go->bsd_compress = 0;
+                   break;
+               }
+               --go->bsd_bits;
+               p[2] = BSD_MAKE_OPT(BSD_CURRENT_VERSION, go->bsd_bits);
            }
-           --go->bsd_bits;
-           p[2] = BSD_MAKE_OPT(BSD_CURRENT_VERSION, go->bsd_bits);
        }
     }
     /* XXX Should Predictor 2 be preferable to Predictor 1? */