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vxlan: Add support for enabling UDP checksums 

Add udpcsum option to enable transmitting UDP checksums when doing
VXLAN/IPv4. Add udp6zerocsumtx, and udp6zerocsumrx options to enable
sending zero checksums and receiving zero checksums in VXLAN/IPv6.

Signed-off-by: Tom Herbert <therbert@google.com>
This commit is contained in:
Tom Herbert 2014-11-07 08:05:34 -08:00 committed by Stephen Hemminger
parent 8ca8fac7aa
commit 666cdc506f
1 changed files with 30 additions and 0 deletions
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30
ip/iplink_vxlan.c
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@ -29,6 +29,7 @@ static void print_explain(FILE *f)
fprintf(f, " [ [no]learning ] [ [no]proxy ] [ [no]rsc ]\n");
fprintf(f, " [ [no]l2miss ] [ [no]l3miss ]\n");
fprintf(f, " [ ageing SECONDS ] [ maxaddress NUMBER ]\n");
fprintf(f, " [ [no]udpcsum ] [ [no]udp6zerocsumtx ] [ [no]udp6zerocsumrx ]\n");
fprintf(f, "\n");
fprintf(f, "Where: VNI := 0-16777215\n");
fprintf(f, " ADDR := { IP_ADDRESS | any }\n");
@ -64,6 +65,9 @@ static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
__u32 age = 0;
__u32 maxaddr = 0;
__u16 dstport = 0;
__u8 udpcsum = 0;
__u8 udp6zerocsumtx = 0;
__u8 udp6zerocsumrx = 0;
int dst_port_set = 0;
struct ifla_vxlan_port_range range = { 0, 0 };
@ -181,6 +185,18 @@ static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
l3miss = 0;
} else if (!matches(*argv, "l3miss")) {
l3miss = 1;
} else if (!matches(*argv, "udpcsum")) {
udpcsum = 1;
} else if (!matches(*argv, "noudpcsum")) {
udpcsum = 0;
} else if (!matches(*argv, "udp6zerocsumtx")) {
udp6zerocsumtx = 1;
} else if (!matches(*argv, "noudp6zerocsumtx")) {
udp6zerocsumtx = 0;
} else if (!matches(*argv, "udp6zerocsumrx")) {
udp6zerocsumrx = 1;
} else if (!matches(*argv, "noudp6zerocsumrx")) {
udp6zerocsumrx = 0;
} else if (matches(*argv, "help") == 0) {
explain();
return -1;
@ -236,6 +252,9 @@ static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
addattr8(n, 1024, IFLA_VXLAN_RSC, rsc);
addattr8(n, 1024, IFLA_VXLAN_L2MISS, l2miss);
addattr8(n, 1024, IFLA_VXLAN_L3MISS, l3miss);
addattr8(n, 1024, IFLA_VXLAN_UDP_CSUM, udpcsum);
addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, udp6zerocsumtx);
addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, udp6zerocsumrx);
if (noage)
addattr32(n, 1024, IFLA_VXLAN_AGEING, 0);
@ -368,6 +387,17 @@ static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
if (tb[IFLA_VXLAN_LIMIT] &&
((maxaddr = rta_getattr_u32(tb[IFLA_VXLAN_LIMIT])) != 0))
fprintf(f, "maxaddr %u ", maxaddr);
if (tb[IFLA_VXLAN_UDP_CSUM] && rta_getattr_u8(tb[IFLA_VXLAN_UDP_CSUM]))
fputs("udpcsum ", f);
if (tb[IFLA_VXLAN_UDP_ZERO_CSUM6_TX] &&
rta_getattr_u8(tb[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
fputs("udp6zerocsumtx ", f);
if (tb[IFLA_VXLAN_UDP_ZERO_CSUM6_RX] &&
rta_getattr_u8(tb[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
fputs("udp6zerocsumrx ", f);
}
static void vxlan_print_help(struct link_util *lu, int argc, char **argv,