map gbp papi: match endianess of f64

clib_net_to_host_f64, clib_host_to_net_f64 are now implemented as '=',
https://gerrit.fd.io/r/#/c/20406/  set papi to match.
- all f64 api references are now wrapped with
  clib_net_to_host_f64 or clib_host_to_net_f64.

IEEE f64 endianess is not defined.  If clib_net_to_host_f64 and
clib_host_to_net_f64 are later defined in VPP as big-endian, it is
a single character change in the papi vpp_serializer.

Note: This breaks the api in a manner that would not be detected by
the flag day initiative.  The scope is small.  This only impacts map.api,
which applied the u64 transformation, while the gbp api uses '='.

The implementation of "=" raises issues for the papi socket implementation
if used between systems of differing endianess.  See Vratko's comments.

- Added get_f64_endian_value() to api to allow client to verify endianess of f64's.

Type: fix
Depends-on: https://gerrit.fd.io/r/#/c/20484/

Change-Id: I00fc64a6557ba0190398df211aa0ea5c7eb101df
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/src/plugins/map/map_api.c b/src/plugins/map/map_api.c
index 1d2614ccb5d..4a0834d786b 100644
--- a/src/plugins/map/map_api.c
+++ b/src/plugins/map/map_api.c
@@ -461,7 +461,7 @@ static void
   int rv;
   f64 ht_ratio;
 
-  ht_ratio = (f64) clib_net_to_host_u64 (mp->ht_ratio);
+  ht_ratio = (f64) clib_net_to_host_f64 (mp->ht_ratio);
   if (ht_ratio == ~0)
     ht_ratio = MAP_IP6_REASS_CONF_HT_RATIO_MAX + 1;
 
@@ -587,15 +587,13 @@ vl_api_map_param_get_t_handler (vl_api_map_param_get_t * mp)
     clib_net_to_host_u16 (mm->ip4_reass_conf_lifetime_ms);
   rmp->ip4_pool_size = clib_net_to_host_u16 (mm->ip4_reass_conf_pool_size);
   rmp->ip4_buffers = clib_net_to_host_u32 (mm->ip4_reass_conf_buffers);
-  rmp->ip4_ht_ratio =
-    clib_net_to_host_u64 ((u64) mm->ip4_reass_conf_ht_ratio);
+  rmp->ip4_ht_ratio = clib_net_to_host_f64 (mm->ip4_reass_conf_ht_ratio);
 
   rmp->ip6_lifetime_ms =
     clib_net_to_host_u16 (mm->ip6_reass_conf_lifetime_ms);
   rmp->ip6_pool_size = clib_net_to_host_u16 (mm->ip6_reass_conf_pool_size);
   rmp->ip6_buffers = clib_net_to_host_u32 (mm->ip6_reass_conf_buffers);
-  rmp->ip6_ht_ratio =
-    clib_net_to_host_u64 ((u64) mm->ip6_reass_conf_ht_ratio);
+  rmp->ip6_ht_ratio = clib_net_to_host_f64 (mm->ip6_reass_conf_ht_ratio);
 
   rmp->sec_check_enable = mm->sec_check;
   rmp->sec_check_fragments = mm->sec_check_frag;