diff options
Diffstat (limited to 'net/tap-linux.c')
| -rw-r--r-- | net/tap-linux.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/net/tap-linux.c b/net/tap-linux.c index 0059404069..b6f1fad5e4 100644 --- a/net/tap-linux.c +++ b/net/tap-linux.c @@ -111,3 +111,29 @@ int tap_probe_vnet_hdr(int fd) return ifr.ifr_flags & IFF_VNET_HDR; } + +void tap_fd_set_offload(int fd, int csum, int tso4, + int tso6, int ecn, int ufo) +{ + unsigned int offload = 0; + + if (csum) { + offload |= TUN_F_CSUM; + if (tso4) + offload |= TUN_F_TSO4; + if (tso6) + offload |= TUN_F_TSO6; + if ((tso4 || tso6) && ecn) + offload |= TUN_F_TSO_ECN; + if (ufo) + offload |= TUN_F_UFO; + } + + if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) { + offload &= ~TUN_F_UFO; + if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) { + fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n", + strerror(errno)); + } + } +} |