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author | Rich Felker <dalias@aerifal.cx> | 2014-06-02 02:13:57 -0400 |
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committer | Rich Felker <dalias@aerifal.cx> | 2014-06-02 02:13:57 -0400 |
commit | 8312f7f60f9dfe88118163d38b8282abf04aac2f (patch) | |
tree | 0dcbcbd3f9e6b3362a920707895624bdc3adb1f5 /src/network/res_querydomain.c | |
parent | 1871f583f419f58bbcd921cda41c991994672c8a (diff) | |
download | musl-8312f7f60f9dfe88118163d38b8282abf04aac2f.tar.gz musl-8312f7f60f9dfe88118163d38b8282abf04aac2f.tar.xz musl-8312f7f60f9dfe88118163d38b8282abf04aac2f.zip |
implement new dns backend, res_send and other legacy resolver functions
this is the second phase of the "resolver overhaul" project. the key additions in this commit are the __res_msend and __res_mkquery functions, which have been factored so as to provide a backend for both the legacy res_* functions and the standard getaddrinfo and getnameinfo functions. the latter however are still using the old backend code; there is code duplication which still needs to be removed, and this will be the next phase of the resolver overhaul. __res_msend is derived from the old __dns_doqueries function, but generalized to send arbitrary caller-provided packets in parallel rather than producing the parallel queries itself. this allows it to be used (completely trivially) as a backend for res_send. the factored-out query generation code, with slightly more generality, is now part of __res_mkquery.
Diffstat (limited to 'src/network/res_querydomain.c')
-rw-r--r-- | src/network/res_querydomain.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/network/res_querydomain.c b/src/network/res_querydomain.c new file mode 100644 index 00000000..c746dbe6 --- /dev/null +++ b/src/network/res_querydomain.c @@ -0,0 +1,14 @@ +#include <resolv.h> +#include <string.h> + +int res_querydomain(const char *name, const char *domain, int class, int type, unsigned char *dest, int len) +{ + char tmp[256]; + size_t nl = strnlen(name, 256); + size_t dl = strnlen(domain, 256); + if (nl+dl+1 > 255) return -1; + memcpy(tmp, name, nl); + tmp[nl] = '.'; + memcpy(tmp+nl+1, domain, dl+1); + return res_query(tmp, class, type, dest, len); +} |