From 1563587b45a39512df9b5810dcc5961d4d21a910 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Thu, 28 Jan 2016 20:51:31 -0500 Subject: reuse parsed resolv.conf in dns core to avoid re-reading/re-parsing --- src/network/res_msend.c | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) (limited to 'src/network/res_msend.c') diff --git a/src/network/res_msend.c b/src/network/res_msend.c index 0ee914d4..a47d18dd 100644 --- a/src/network/res_msend.c +++ b/src/network/res_msend.c @@ -27,8 +27,9 @@ static unsigned long mtime() + ts.tv_nsec / 1000000; } -int __res_msend(int nqueries, const unsigned char *const *queries, - const int *qlens, unsigned char *const *answers, int *alens, int asize) +int __res_msend_rc(int nqueries, const unsigned char *const *queries, + const int *qlens, unsigned char *const *answers, int *alens, int asize, + const struct resolvconf *conf) { int fd; int timeout, attempts, retry_interval, servfail_retry; @@ -45,19 +46,15 @@ int __res_msend(int nqueries, const unsigned char *const *queries, int cs; struct pollfd pfd; unsigned long t0, t1, t2; - struct resolvconf conf; pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs); - /* Get nameservers & timeout/retry settings from resolv.conf */ - if (__get_resolv_conf(&conf, 0, 0) < 0) return -1; - - timeout = 1000*conf.timeout; - attempts = conf.attempts; + timeout = 1000*conf->timeout; + attempts = conf->attempts; - nns = conf.nns; - for (nns=0; nnsnns; + for (nns=0; nnsnns; nns++) { + const struct address *iplit = &conf->ns[nns]; if (iplit->family == AF_INET) { memcpy(&ns[nns].sin.sin_addr, iplit->addr, 4); ns[nns].sin.sin_port = htons(53); @@ -178,3 +175,11 @@ out: return 0; } + +int __res_msend(int nqueries, const unsigned char *const *queries, + const int *qlens, unsigned char *const *answers, int *alens, int asize) +{ + struct resolvconf conf; + if (__get_resolv_conf(&conf, 0, 0) < 0) return -1; + return __res_msend_rc(nqueries, queries, qlens, answers, alens, asize, &conf); +} -- cgit v1.2.1