diff options
| author | Ian Pilcher <arequipeno@gmail.com> | 2022-10-18 11:45:28 -0500 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-10-25 12:48:08 +0200 |
| commit | 7e867f5d66510cb70bfae7be2d4ec28351934f66 (patch) | |
| tree | f1f243941410a0dba05b01a3744fa30070d7dce9 /src | |
| parent | 461f36979f4ed2b6cc95f06cf5f9c3c84bdf9e70 (diff) | |
libnftnl: Fix res_id byte order
The res_id member of struct nfgenmsg is supposed to be in network
byte order (big endian). Call htons() in __nftnl_nlmsg_build_hdr()
to ensure that this is true on little endian systems.
There is a kernel workaround that was introduced in 4.3 to address
this issue:
commit a9de9777d613500b089a7416f936bf3ae5f070d2
Author: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Fri Aug 28 21:01:43 2015 +0200
netfilter: nfnetlink: work around wrong endianess in res_id field
And current oldest stable kernel branch in 4.9, merge this to fix
the incorrect endianness from userspace.
Signed-off-by: Ian Pilcher <arequipeno@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/common.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/common.c b/src/common.c index 2d83c12..08572c3 100644 --- a/src/common.c +++ b/src/common.c @@ -10,6 +10,7 @@ #include <stdlib.h> #include <sys/socket.h> #include <time.h> +#include <arpa/inet.h> #include <linux/netlink.h> #include <linux/netfilter/nfnetlink.h> #include <linux/netfilter/nf_tables.h> @@ -37,7 +38,7 @@ static struct nlmsghdr *__nftnl_nlmsg_build_hdr(char *buf, uint16_t type, nfh = mnl_nlmsg_put_extra_header(nlh, sizeof(struct nfgenmsg)); nfh->nfgen_family = family; nfh->version = NFNETLINK_V0; - nfh->res_id = res_id; + nfh->res_id = htons(res_id); return nlh; } |