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zebra: fix routing socket AF_LINK handling on NETMASK

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IPv6 netmasks use AF_LINK family type and puts the correct amount of
set bits in the data structure. If we only copy the SDL header we
won't get all IPv6 address length, we must copy the whole extension of
the `sockaddr_in6` struct (which is provided in `destlen` parameter).

Signed-off-by: Rafael Zalamena <rzalamena@opensourcerouting.org>
(cherry picked from commit 691e903879)
This commit is contained in:
Rafael Zalamena 2019-01-17 20:46:11 -02:00
parent b04f70c1b8
commit e0f741f466
1 changed files with 1 additions and 1 deletions
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2
zebra/kernel_socket.c
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@ -274,7 +274,7 @@ size_t _rta_get(caddr_t sap, void *destp, size_t destlen, bool checkaf)
if (sa->sa_family == AF_LINK) {
sdl = (struct sockaddr_dl *)sa;
if (sdl->sdl_index == 0 || sdl->sdl_nlen == 0)
copylen = sizeof(*sdl) - sizeof(sdl->sdl_data);
copylen = destlen;
}
if (copylen > destlen) {