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resolv: Move ns_name_ntop to its own file and into libc

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Reformat to GNU style.  Avoid out-of-bounds pointer arithmetic
(e.g., use eom - dn < 2 instead of dn + 1 >= eom).  Inline the
labellen function and fold the compression pointer check into
the length check (l >= 64).  Assume ASCII encoding.

The symbol was moved using scripts/move-symbol-to-libc.py.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Florian Weimer
2021-07-15 08:28:50 +02:00
parent 2ff32dd492
commit adcc572a29
69 changed files with 221 additions and 161 deletions
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resolv/Versions
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@ -24,6 +24,9 @@ libc {
getaddrinfo_a;
%endif
}
GLIBC_2.9 {
ns_name_ntop;
}
GLIBC_2.34 {
%if PTHREAD_IN_LIBC
gai_cancel;
@ -31,6 +34,7 @@ libc {
gai_suspend;
getaddrinfo_a;
%endif
ns_name_ntop;
}
GLIBC_PRIVATE {
%if !PTHREAD_IN_LIBC
@ -40,6 +44,7 @@ libc {
__inet_aton_exact;
__inet_pton_length;
__res_iclose;
__ns_name_ntop;
__resolv_context_get;
__resolv_context_get_override;
__resolv_context_get_preinit;
@ -137,7 +142,6 @@ libresolv {
ns_msg_getflag;
ns_name_compress;
ns_name_ntol;
ns_name_ntop;
ns_name_pack;
ns_name_pton;
ns_name_rollback;
@ -158,7 +162,6 @@ libresolv {
GLIBC_PRIVATE {
__ns_get16;
__ns_get32;
__ns_name_ntop;
__ns_name_unpack;
__res_context_hostalias;
__res_context_query;