fazilsheik
/
android_packages_modules_Connectivity
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

clatd - pull in more fragmentation related stuff from kernel headers 

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Iced00bb4341497e14c8feb3bb1d4fbed287fd29d
This commit is contained in:
Maciej Żenczykowski 2022-10-24 02:43:21 -07:00
parent 381e339647
commit e0ddc47540
1 changed files with 13 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
bpf_progs/clatd.c
View File

@ -38,8 +38,19 @@
#include "bpf_shared.h"
#include "clat_mark.h"
// From kernel:include/net/ip.h
#define IP_DF 0x4000 // Flag: "Don't Fragment"
// IP flags. (from kernel's include/net/ip.h)
#define IP_CE 0x8000 // Flag: "Congestion" (really reserved 'evil bit')
#define IP_DF 0x4000 // Flag: "Don't Fragment"
#define IP_MF 0x2000 // Flag: "More Fragments"
#define IP_OFFSET 0x1FFF // "Fragment Offset" part
// from kernel's include/net/ipv6.h
struct frag_hdr {
__u8 nexthdr;
__u8 reserved; // always zero
__be16 frag_off; // 13 bit offset, 2 bits zero, 1 bit "More Fragments"
__be32 identification;
};
DEFINE_BPF_MAP_GRW(clat_ingress6_map, HASH, ClatIngress6Key, ClatIngress6Value, 16, AID_SYSTEM)