proxmox-mirrors/mirror_iproute2
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_iproute2 synced 2025-10-17 07:07:15 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

ip link gre: Add support to configure FOU and GUE

Browse Source 
This patch adds support to configure foo-over-udp (FOU) and Generic
UDP Encapsulation for GRE tunnels. This configuration allows selection
of FOU or GUE for the tunnel, specification of the source and
destination ports for UDP tunnel, and enabling TX checksum. This
configuration only affects the transmit side of a tunnel.

Example:

ip link add name tun1 type gre remote 192.168.1.1 local 192.168.1.2 \
   ttl 225 encap fou encap-sport auto encap-dport 7777 encap-csum

This would create an GRE tunnel in GUE encapsulation where the source
port is automatically selected (based on hash of inner packet) and
checksums in the encapsulating UDP header are enabled.

Signed-off-by: Tom Herbert <therbert@google.com>
This commit is contained in:
Tom Herbert 2014-11-05 10:06:26 -08:00 committed by Stephen Hemminger
parent c1159152e1
commit 80c24b097e
1 changed files with 89 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

89
ip/link_gre.c
View File

@ -29,6 +29,9 @@ static void print_usage(FILE *f)
fprintf(f, " type { gre | gretap } [ remote ADDR ] [ local ADDR ]\n");
fprintf(f, " [ [i|o]seq ] [ [i|o]key KEY ] [ [i|o]csum ]\n");
fprintf(f, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n");
fprintf(f, " [ noencap ] [ encap { fou | gue | none } ]\n");
fprintf(f, " [ encap-sport PORT ] [ encap-dport PORT ]\n");
fprintf(f, " [ [no]encap-csum ] [ [no]encap-csum6 ]\n");
fprintf(f, "\n");
fprintf(f, "Where: NAME := STRING\n");
fprintf(f, " ADDR := { IP_ADDRESS | any }\n");
@ -67,6 +70,10 @@ static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
__u8 ttl = 0;
__u8 tos = 0;
int len;
__u16 encaptype = 0;
__u16 encapflags = 0;
__u16 encapsport = 0;
__u16 encapdport = 0;
if (!(n->nlmsg_flags & NLM_F_CREATE)) {
memset(&req, 0, sizeof(req));
@ -132,6 +139,15 @@ get_failed:
if (greinfo[IFLA_GRE_LINK])
link = rta_getattr_u8(greinfo[IFLA_GRE_LINK]);
if (greinfo[IFLA_GRE_ENCAP_TYPE])
encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
if (greinfo[IFLA_GRE_ENCAP_FLAGS])
encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
if (greinfo[IFLA_GRE_ENCAP_SPORT])
encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
if (greinfo[IFLA_GRE_ENCAP_DPORT])
encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
}
while (argc > 0) {
@ -241,6 +257,36 @@ get_failed:
tos = uval;
} else
tos = 1;
} else if (strcmp(*argv, "noencap") == 0) {
encaptype = TUNNEL_ENCAP_NONE;
} else if (strcmp(*argv, "encap") == 0) {
NEXT_ARG();
if (strcmp(*argv, "fou") == 0)
encaptype = TUNNEL_ENCAP_FOU;
else if (strcmp(*argv, "gue") == 0)
encaptype = TUNNEL_ENCAP_GUE;
else if (strcmp(*argv, "none") == 0)
encaptype = TUNNEL_ENCAP_NONE;
else
invarg("Invalid encap type.", *argv);
} else if (strcmp(*argv, "encap-sport") == 0) {
NEXT_ARG();
if (strcmp(*argv, "auto") == 0)
encapsport = 0;
else if (get_u16(&encapsport, *argv, 0))
invarg("Invalid source port.", *argv);
} else if (strcmp(*argv, "encap-dport") == 0) {
NEXT_ARG();
if (get_u16(&encapdport, *argv, 0))
invarg("Invalid destination port.", *argv);
} else if (strcmp(*argv, "encap-csum") == 0) {
encapflags |= TUNNEL_ENCAP_FLAG_CSUM;
} else if (strcmp(*argv, "noencap-csum") == 0) {
encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
encapflags |= TUNNEL_ENCAP_FLAG_CSUM6;
} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
encapflags |= ~TUNNEL_ENCAP_FLAG_CSUM6;
} else
usage();
argc--; argv++;
@ -271,6 +317,11 @@ get_failed:
addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
return 0;
}
@ -357,6 +408,44 @@ static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
fputs("icsum ", f);
if (oflags & GRE_CSUM)
fputs("ocsum ", f);
if (tb[IFLA_GRE_ENCAP_TYPE] &&
*(__u16 *)RTA_DATA(tb[IFLA_GRE_ENCAP_TYPE]) != TUNNEL_ENCAP_NONE) {
__u16 type = rta_getattr_u16(tb[IFLA_GRE_ENCAP_TYPE]);
__u16 flags = rta_getattr_u16(tb[IFLA_GRE_ENCAP_FLAGS]);
__u16 sport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_SPORT]);
__u16 dport = rta_getattr_u16(tb[IFLA_GRE_ENCAP_DPORT]);
fputs("encap ", f);
switch (type) {
case TUNNEL_ENCAP_FOU:
fputs("fou ", f);
break;
case TUNNEL_ENCAP_GUE:
fputs("gue ", f);
break;
default:
fputs("unknown ", f);
break;
}
if (sport == 0)
fputs("encap-sport auto ", f);
else
fprintf(f, "encap-sport %u", ntohs(sport));
fprintf(f, "encap-dport %u ", ntohs(dport));
if (flags & TUNNEL_ENCAP_FLAG_CSUM)
fputs("encap-csum ", f);
else
fputs("noencap-csum ", f);
if (flags & TUNNEL_ENCAP_FLAG_CSUM6)
fputs("encap-csum6 ", f);
else
fputs("noencap-csum6 ", f);
}
}
static void gre_print_help(struct link_util *lu, int argc, char **argv,