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| author | Florian Weimer <fweimer@redhat.com> | 2017-06-30 21:10:23 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2017-07-03 20:52:59 +0200 |
| commit | 352f4ff9a268b81ef5d4b2413f582565806e4790 (patch) | |
| tree | fb27056dfdeafe43c021f6127c9544c016e78019 /nss/digits_dots.c | |
| parent | 4e45d83c92dbb5b8dc20654f32395108d18cf739 (diff) | |
| download | glibc-352f4ff9a268b81ef5d4b2413f582565806e4790.tar.gz glibc-352f4ff9a268b81ef5d4b2413f582565806e4790.tar.xz glibc-352f4ff9a268b81ef5d4b2413f582565806e4790.zip | |
resolv: Introduce struct resolv_context [BZ #21668]
struct resolv_context objects provide a temporary resolver context which does not change during a name lookup operation. Only when the outmost context is created, the stub resolver configuration is verified to be current (at present, only against previous res_init calls). Subsequent attempts to obtain the context will reuse the result of the initial verification operation. struct resolv_context can also be extended in the future to store data which needs to be deallocated during thread cancellation.
Diffstat (limited to 'nss/digits_dots.c')
| -rw-r--r-- | nss/digits_dots.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/nss/digits_dots.c b/nss/digits_dots.c index 8dcbf9eb0a..0c1fa97e39 100644 --- a/nss/digits_dots.c +++ b/nss/digits_dots.c @@ -23,6 +23,7 @@ #include <ctype.h> #include <wctype.h> #include <resolv/resolv-internal.h> +#include <resolv/resolv_context.h> #include <netdb.h> #include <arpa/inet.h> #include "nsswitch.h" @@ -38,11 +39,10 @@ __nss_hostname_digits_dots (const char *name, struct hostent *resbuf, size_t buflen, struct hostent **result, enum nss_status *status, int af, int *h_errnop) { - int save; - /* We have to test for the use of IPv6 which can only be done by examining `_res'. */ - if (__res_maybe_init (&_res, 0) == -1) + struct resolv_context *ctx = __resolv_context_get (); + if (ctx == NULL) { if (h_errnop) *h_errnop = NETDB_INTERNAL; @@ -52,6 +52,21 @@ __nss_hostname_digits_dots (const char *name, struct hostent *resbuf, *result = NULL; return -1; } + int ret = __nss_hostname_digits_dots_context + (ctx, name, resbuf, buffer, buffer_size, buflen, + result, status, af, h_errnop); + __resolv_context_put (ctx); + return ret; +} + +int +__nss_hostname_digits_dots_context (struct resolv_context *ctx, + const char *name, struct hostent *resbuf, + char **buffer, size_t *buffer_size, + size_t buflen, struct hostent **result, + enum nss_status *status, int af, int *h_errnop) +{ + int save; /* * disallow names consisting only of digits/dots, unless |