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Enforce version drift limits for libuv

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libuv support for receiving multiple UDP messages in a single system
call (recvmmsg()) has been tweaked several times between libuv versions
1.35.0 and 1.40.0.  Mixing and matching libuv versions within that span
may lead to assertion failures and is therefore considered harmful, so
try to limit potential damage be preventing users from mixing libuv
versions with distinct sets of recvmmsg()-related flags.
This commit is contained in:
Ondřej Surý
2023-02-08 09:29:54 +01:00
committed by Michał Kępień
parent 251f411fc3
commit 735d09bffe
1 changed files with 12 additions and 1 deletions
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13
lib/isc/netmgr/netmgr.c
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@@ -177,8 +177,10 @@ netmgr_teardown(void *arg) {
#elif HAVE_DECL_UV_UDP_MMSG_FREE
#define MINIMAL_UV_VERSION UV_VERSION(1, 40, 0)
#elif HAVE_DECL_UV_UDP_RECVMMSG
#define MAXIMAL_UV_VERSION UV_VERSION(1, 39, 99)
#define MINIMAL_UV_VERSION UV_VERSION(1, 37, 0)
#else
#define MAXIMAL_UV_VERSION UV_VERSION(1, 34, 99)
#define MINIMAL_UV_VERSION UV_VERSION(1, 0, 0)
#endif
@@ -186,10 +188,19 @@ void
isc_netmgr_create(isc_mem_t *mctx, isc_loopmgr_t *loopmgr, isc_nm_t **netmgrp) {
isc_nm_t *netmgr = NULL;
#ifdef MAXIMAL_UV_VERSION
if (uv_version() > MAXIMAL_UV_VERSION) {
FATAL_ERROR("libuv version too new: running with libuv %s "
"when compiled with libuv %s will lead to "
"libuv failures",
uv_version_string(), UV_VERSION_STRING);
}
#endif /* MAXIMAL_UV_VERSION */
if (uv_version() < MINIMAL_UV_VERSION) {
FATAL_ERROR("libuv version too old: running with libuv %s "
"when compiled with libuv %s will lead to "
"libuv failures because of unknown flags",
"libuv failures",
uv_version_string(), UV_VERSION_STRING);
}