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| author | Florian Weimer <fweimer@redhat.com> | 2024-06-13 18:56:30 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2024-06-13 18:56:30 +0200 |
| commit | 868ab8923a2ec977faafec97ecafac0c3159c1b2 (patch) | |
| tree | a3dbfe0cdee4f26c0635ddc4b557fd0e30b08dd2 | |
| parent | 29807a271edca3e47195bda0c69ae45e245551a9 (diff) | |
| download | glibc-868ab8923a2ec977faafec97ecafac0c3159c1b2.zip glibc-868ab8923a2ec977faafec97ecafac0c3159c1b2.tar.gz glibc-868ab8923a2ec977faafec97ecafac0c3159c1b2.tar.bz2 | |
resolv: Track single-request fallback via _res._flags (bug 31476)
This avoids changing _res.options, which inteferes with change
detection as part of automatic reloading of /etc/resolv.conf.
Reviewed-by: DJ Delorie <dj@redhat.com>
| -rw-r--r-- | resolv/res_send.c | 12 | ||||
| -rw-r--r-- | resolv/resolv-internal.h | 2 |
2 files changed, 9 insertions, 5 deletions
diff --git a/resolv/res_send.c b/resolv/res_send.c index fb02172..ea7cf19 100644 --- a/resolv/res_send.c +++ b/resolv/res_send.c @@ -947,9 +947,11 @@ send_dg(res_state statp, seconds /= statp->nscount; if (seconds <= 0) seconds = 1; - bool single_request_reopen = (statp->options & RES_SNGLKUPREOP) != 0; - bool single_request = (((statp->options & RES_SNGLKUP) != 0) - | single_request_reopen); + bool single_request_reopen = ((statp->options & RES_SNGLKUPREOP) + || (statp->_flags & RES_F_SNGLKUPREOP)); + bool single_request = ((statp->options & RES_SNGLKUP) + || (statp->_flags & RES_F_SNGLKUP) + || single_request_reopen); int save_gotsomewhere = *gotsomewhere; int retval; @@ -1006,14 +1008,14 @@ send_dg(res_state statp, have received the first answer. */ if (!single_request) { - statp->options |= RES_SNGLKUP; + statp->_flags |= RES_F_SNGLKUP; single_request = true; *gotsomewhere = save_gotsomewhere; goto retry; } else if (!single_request_reopen) { - statp->options |= RES_SNGLKUPREOP; + statp->_flags |= RES_F_SNGLKUPREOP; single_request_reopen = true; *gotsomewhere = save_gotsomewhere; __res_iclose (statp, false); diff --git a/resolv/resolv-internal.h b/resolv/resolv-internal.h index 24b164f..944af3e 100644 --- a/resolv/resolv-internal.h +++ b/resolv/resolv-internal.h @@ -26,6 +26,8 @@ #define RES_F_VC 0x00000001 /* Socket is TCP. */ #define RES_F_CONN 0x00000002 /* Socket is connected. */ #define RES_F_EDNS0ERR 0x00000004 /* EDNS0 caused errors. */ +#define RES_F_SNGLKUP 0x00200000 /* Private version of RES_SNGLKUP. */ +#define RES_F_SNGLKUPREOP 0x00400000 /* Private version of RES_SNGLKUPREOP. */ /* The structure HEADER is normally aligned on a word boundary. In some code, we need to access this structure when it may be aligned |