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in performing dns lookups, check result from res_mkquery

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don't send a query that may be malformed.
This commit is contained in:
Natanael Copa
2016-05-25 11:22:13 +02:00
committed by Rich Felker
parent 5c43e1dbc8
commit 04bced403d
1 changed files with 4 additions and 0 deletions
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4
src/network/lookup_name.c
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@ -145,11 +145,15 @@ static int name_from_dns(struct address buf[static MAXADDRS], char canon[static
if (family != AF_INET6) { if (family != AF_INET6) {
qlens[nq] = __res_mkquery(0, name, 1, RR_A, 0, 0, 0, qlens[nq] = __res_mkquery(0, name, 1, RR_A, 0, 0, 0,
qbuf[nq], sizeof *qbuf); qbuf[nq], sizeof *qbuf);
if (qlens[nq] == -1)
return EAI_NONAME;
nq++; nq++;
} }
if (family != AF_INET) { if (family != AF_INET) {
qlens[nq] = __res_mkquery(0, name, 1, RR_AAAA, 0, 0, 0, qlens[nq] = __res_mkquery(0, name, 1, RR_AAAA, 0, 0, 0,
qbuf[nq], sizeof *qbuf); qbuf[nq], sizeof *qbuf);
if (qlens[nq] == -1)
return EAI_NONAME;
nq++; nq++;
} }