diff options
Diffstat (limited to 'resolv/res_get_nsaddr.c')
-rw-r--r-- | resolv/res_get_nsaddr.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/resolv/res_get_nsaddr.c b/resolv/res_get_nsaddr.c new file mode 100644 index 0000000000..593597bdd7 --- /dev/null +++ b/resolv/res_get_nsaddr.c @@ -0,0 +1,39 @@ +/* Name server address at specified index in res_state. + Copyright (C) 2015-2021 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <assert.h> +#include <resolv.h> +#include <resolv-internal.h> + +struct sockaddr * +__res_get_nsaddr (res_state statp, unsigned int n) +{ + assert (n < statp->nscount); + + if (statp->nsaddr_list[n].sin_family == 0 + && statp->_u._ext.nsaddrs[n] != NULL) + /* statp->_u._ext.nsaddrs[n] holds an address that is larger than + struct sockaddr, and user code did not update + statp->nsaddr_list[n]. */ + return (struct sockaddr *) statp->_u._ext.nsaddrs[n]; + else + /* User code updated statp->nsaddr_list[n], or statp->nsaddr_list[n] + has the same content as statp->_u._ext.nsaddrs[n]. */ + return (struct sockaddr *) (void *) &statp->nsaddr_list[n]; +} +libc_hidden_def (__res_get_nsaddr) |