diff options
Diffstat (limited to 'libc/netbsd/resolv/res_send.c')
| -rw-r--r-- | libc/netbsd/resolv/res_send.c | 35 |
1 files changed, 24 insertions, 11 deletions
diff --git a/libc/netbsd/resolv/res_send.c b/libc/netbsd/resolv/res_send.c index f3ee539..ceb2c77 100644 --- a/libc/netbsd/resolv/res_send.c +++ b/libc/netbsd/resolv/res_send.c @@ -370,10 +370,13 @@ res_nsend(res_state statp, ResolvCacheStatus cache_status = RESOLV_CACHE_UNSUPPORTED; #endif +#if !USE_RESOLV_CACHE if (statp->nscount == 0) { errno = ESRCH; return (-1); } +#endif + if (anssiz < HFIXEDSZ) { errno = EINVAL; return (-1); @@ -385,17 +388,27 @@ res_nsend(res_state statp, terrno = ETIMEDOUT; #if USE_RESOLV_CACHE - cache = __get_res_cache(); - if (cache != NULL) { - int anslen = 0; - cache_status = _resolv_cache_lookup( - cache, buf, buflen, - ans, anssiz, &anslen); - - if (cache_status == RESOLV_CACHE_FOUND) { - return anslen; - } - } + // get the cache associated with the interface + cache = __get_res_cache(statp->iface); + if (cache != NULL) { + int anslen = 0; + cache_status = _resolv_cache_lookup( + cache, buf, buflen, + ans, anssiz, &anslen); + + if (cache_status == RESOLV_CACHE_FOUND) { + return anslen; + } else { + // had a cache miss for a known interface, so populate the thread private + // data so the normal resolve path can do its thing + _resolv_populate_res_for_iface(statp); + } + } + + if (statp->nscount == 0) { + errno = ESRCH; + return (-1); + } #endif /* |