Fix some narrowing warnings on LP64/LLP64 platforms.

Add a ND_BYTES_AVAILABLE_AFTER() macro to find the number of bytes
available in the captured data, starting at the byte pointed to by the
argument.  It returns a u_int rather than a ptrdiff_t, so it'll be
32 bits on LP64 and LLP64 platforms as well as on ILP32 platforms.  Use
that macro.

Make size-of-buffer arguments size_t.

Cast some size_t and ptrdiff_t values to u_int or int.

1 files changed, 1 insertions, 1 deletions

diff --git a/print-nsh.c b/print-nsh.c
index d752b247..17d62569 100644
--- a/print-nsh.c
+++ b/print-nsh.c
@@ -170,7 +170,7 @@ nsh_print(netdissect_options *ndo, const u_char *bp, u_int len)
         ip6_print(ndo, bp, next_len);
         break;
     case 0x3:
-        ether_print(ndo, bp, next_len, ndo->ndo_snapend - bp, NULL, NULL);
+        ether_print(ndo, bp, next_len, ND_BYTES_AVAILABLE_AFTER(bp), NULL, NULL);
         break;
     default:
         ND_PRINT("ERROR: unknown-next-protocol");