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iproute: add support for seg6 l2encap mode 

This patch adds support for the L2ENCAP seg6 mode, enabling to encapsulate
L2 frames within SRv6 packets.

Signed-off-by: David Lebrun <david.lebrun@uclouvain.be>
This commit is contained in:
David Lebrun 2017-08-28 20:26:39 +01:00 committed by Stephen Hemminger
parent 3ee52855a0
commit cf87da417b
1 changed files with 30 additions and 11 deletions
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41
ip/iproute_lwtunnel.c
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@ -110,6 +110,32 @@ static void print_srh(FILE *fp, struct ipv6_sr_hdr *srh)
}
}
static const char *seg6_mode_types[] = {
[SEG6_IPTUN_MODE_INLINE] = "inline",
[SEG6_IPTUN_MODE_ENCAP] = "encap",
[SEG6_IPTUN_MODE_L2ENCAP] = "l2encap",
};
static const char *format_seg6mode_type(int mode)
{
if (mode < 0 || mode > ARRAY_SIZE(seg6_mode_types))
return "<unknown>";
return seg6_mode_types[mode];
}
static int read_seg6mode_type(const char *mode)
{
int i;
for (i = 0; i < ARRAY_SIZE(seg6_mode_types); i++) {
if (strcmp(mode, seg6_mode_types[i]) == 0)
return i;
}
return -1;
}
static void print_encap_seg6(FILE *fp, struct rtattr *encap)
{
struct rtattr *tb[SEG6_IPTUNNEL_MAX+1];
@ -121,8 +147,7 @@ static void print_encap_seg6(FILE *fp, struct rtattr *encap)
return;
tuninfo = RTA_DATA(tb[SEG6_IPTUNNEL_SRH]);
fprintf(fp, "mode %s ",
(tuninfo->mode == SEG6_IPTUN_MODE_ENCAP) ? "encap" : "inline");
fprintf(fp, "mode %s ", format_seg6mode_type(tuninfo->mode));
print_srh(fp, tuninfo->srh);
}
@ -457,11 +482,8 @@ static int parse_encap_seg6(struct rtattr *rta, size_t len, int *argcp,
NEXT_ARG();
if (mode_ok++)
duparg2("mode", *argv);
if (strcmp(*argv, "encap") == 0)
encap = 1;
else if (strcmp(*argv, "inline") == 0)
encap = 0;
else
encap = read_seg6mode_type(*argv);
if (encap < 0)
invarg("\"mode\" value is invalid\n", *argv);
} else if (strcmp(*argv, "segs") == 0) {
NEXT_ARG();
@ -490,10 +512,7 @@ static int parse_encap_seg6(struct rtattr *rta, size_t len, int *argcp,
tuninfo = malloc(sizeof(*tuninfo) + srhlen);
memset(tuninfo, 0, sizeof(*tuninfo) + srhlen);
if (encap)
tuninfo->mode = SEG6_IPTUN_MODE_ENCAP;
else
tuninfo->mode = SEG6_IPTUN_MODE_INLINE;
tuninfo->mode = encap;
memcpy(tuninfo->srh, srh, srhlen);