* [PATCH iproute2-next 1/2] uapi: updates to lwtunnel and rpl iptunnel
@ 2020-05-02 22:58 Alexander Aring
2020-05-02 22:58 ` [PATCH iproute2-next 2/2] lwtunnel: add support for rpl segment routing Alexander Aring
0 siblings, 1 reply; 3+ messages in thread
From: Alexander Aring @ 2020-05-02 22:58 UTC (permalink / raw)
To: netdev; +Cc: mcr, stefan, Alexander Aring
Update uapi headers.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
---
include/uapi/linux/rpl.h | 48 +++++++++++++++++++++++++++++++
include/uapi/linux/rpl_iptunnel.h | 21 ++++++++++++++
2 files changed, 69 insertions(+)
create mode 100644 include/uapi/linux/rpl.h
create mode 100644 include/uapi/linux/rpl_iptunnel.h
diff --git a/include/uapi/linux/rpl.h b/include/uapi/linux/rpl.h
new file mode 100644
index 00000000..c24b64cd
--- /dev/null
+++ b/include/uapi/linux/rpl.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * IPv6 RPL-SR implementation
+ *
+ * Author:
+ * (C) 2020 Alexander Aring <alex.aring@gmail.com>
+ */
+
+#ifndef _LINUX_RPL_H
+#define _LINUX_RPL_H
+
+#include <asm/byteorder.h>
+#include <linux/types.h>
+#include <linux/in6.h>
+
+/*
+ * RPL SR Header
+ */
+struct ipv6_rpl_sr_hdr {
+ __u8 nexthdr;
+ __u8 hdrlen;
+ __u8 type;
+ __u8 segments_left;
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ __u32 cmpre:4,
+ cmpri:4,
+ reserved:4,
+ pad:4,
+ reserved1:16;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ __u32 reserved:20,
+ pad:4,
+ cmpri:4,
+ cmpre:4;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+
+ union {
+ struct in6_addr addr[0];
+ __u8 data[0];
+ } segments;
+} __attribute__((packed));
+
+#define rpl_segaddr segments.addr
+#define rpl_segdata segments.data
+
+#endif
diff --git a/include/uapi/linux/rpl_iptunnel.h b/include/uapi/linux/rpl_iptunnel.h
new file mode 100644
index 00000000..c255b92c
--- /dev/null
+++ b/include/uapi/linux/rpl_iptunnel.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * IPv6 RPL-SR implementation
+ *
+ * Author:
+ * (C) 2020 Alexander Aring <alex.aring@gmail.com>
+ */
+
+#ifndef _LINUX_RPL_IPTUNNEL_H
+#define _LINUX_RPL_IPTUNNEL_H
+
+enum {
+ RPL_IPTUNNEL_UNSPEC,
+ RPL_IPTUNNEL_SRH,
+ __RPL_IPTUNNEL_MAX,
+};
+#define RPL_IPTUNNEL_MAX (__RPL_IPTUNNEL_MAX - 1)
+
+#define RPL_IPTUNNEL_SRH_SIZE(srh) (((srh)->hdrlen + 1) << 3)
+
+#endif
--
2.20.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH iproute2-next 2/2] lwtunnel: add support for rpl segment routing
2020-05-02 22:58 [PATCH iproute2-next 1/2] uapi: updates to lwtunnel and rpl iptunnel Alexander Aring
@ 2020-05-02 22:58 ` Alexander Aring
2020-05-05 16:48 ` David Ahern
0 siblings, 1 reply; 3+ messages in thread
From: Alexander Aring @ 2020-05-02 22:58 UTC (permalink / raw)
To: netdev; +Cc: mcr, stefan, Alexander Aring
This patch adds support for rpl segment routing settings.
Example:
ip -n ns0 -6 route add 2001::3 encap rpl segs \
fe80::c8fe:beef:cafe:cafe,fe80::c8fe:beef:cafe:beef dev lowpan0
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
---
ip/iproute.c | 2 +-
ip/iproute_lwtunnel.c | 111 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 112 insertions(+), 1 deletion(-)
diff --git a/ip/iproute.c b/ip/iproute.c
index 07c45169..05ec2c29 100644
--- a/ip/iproute.c
+++ b/ip/iproute.c
@@ -101,7 +101,7 @@ static void usage(void)
"TIME := NUMBER[s|ms]\n"
"BOOL := [1|0]\n"
"FEATURES := ecn\n"
- "ENCAPTYPE := [ mpls | ip | ip6 | seg6 | seg6local ]\n"
+ "ENCAPTYPE := [ mpls | ip | ip6 | seg6 | seg6local | rpl ]\n"
"ENCAPHDR := [ MPLSLABEL | SEG6HDR ]\n"
"SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n"
"SEGMODE := [ encap | inline ]\n"
diff --git a/ip/iproute_lwtunnel.c b/ip/iproute_lwtunnel.c
index ff7c9d7f..5f73f402 100644
--- a/ip/iproute_lwtunnel.c
+++ b/ip/iproute_lwtunnel.c
@@ -29,6 +29,8 @@
#include <linux/seg6.h>
#include <linux/seg6_iptunnel.h>
+#include <linux/rpl.h>
+#include <linux/rpl_iptunnel.h>
#include <linux/seg6_hmac.h>
#include <linux/seg6_local.h>
#include <linux/if_tunnel.h>
@@ -50,6 +52,8 @@ static const char *format_encap_type(int type)
return "seg6";
case LWTUNNEL_ENCAP_SEG6_LOCAL:
return "seg6local";
+ case LWTUNNEL_ENCAP_RPL:
+ return "rpl";
default:
return "unknown";
}
@@ -84,6 +88,8 @@ static int read_encap_type(const char *name)
return LWTUNNEL_ENCAP_SEG6;
else if (strcmp(name, "seg6local") == 0)
return LWTUNNEL_ENCAP_SEG6_LOCAL;
+ else if (strcmp(name, "rpl") == 0)
+ return LWTUNNEL_ENCAP_RPL;
else if (strcmp(name, "help") == 0)
encap_type_usage();
@@ -162,6 +168,32 @@ static void print_encap_seg6(FILE *fp, struct rtattr *encap)
print_srh(fp, tuninfo->srh);
}
+static void print_rpl_srh(FILE *fp, struct ipv6_rpl_sr_hdr *srh)
+{
+ int i;
+
+ for (i = srh->segments_left - 1; i >= 0; i--) {
+ print_color_string(PRINT_ANY, COLOR_INET6,
+ NULL, "%s ",
+ rt_addr_n2a(AF_INET6, 16, &srh->rpl_segaddr[i]));
+ }
+}
+
+static void print_encap_rpl(FILE *fp, struct rtattr *encap)
+{
+ struct rtattr *tb[RPL_IPTUNNEL_MAX + 1];
+ struct ipv6_rpl_sr_hdr *srh;
+
+ parse_rtattr_nested(tb, RPL_IPTUNNEL_MAX, encap);
+
+ if (!tb[RPL_IPTUNNEL_SRH])
+ return;
+
+ srh = RTA_DATA(tb[RPL_IPTUNNEL_SRH]);
+
+ print_rpl_srh(fp, srh);
+}
+
static const char *seg6_action_names[SEG6_LOCAL_ACTION_MAX + 1] = {
[SEG6_LOCAL_ACTION_END] = "End",
[SEG6_LOCAL_ACTION_END_X] = "End.X",
@@ -567,6 +599,9 @@ void lwt_print_encap(FILE *fp, struct rtattr *encap_type,
case LWTUNNEL_ENCAP_SEG6_LOCAL:
print_encap_seg6local(fp, encap);
break;
+ case LWTUNNEL_ENCAP_RPL:
+ print_encap_rpl(fp, encap);
+ break;
}
}
@@ -690,6 +725,79 @@ out:
return ret;
}
+static struct ipv6_rpl_sr_hdr *parse_rpl_srh(char *segbuf)
+{
+ struct ipv6_rpl_sr_hdr *srh;
+ int nsegs = 0;
+ int srhlen;
+ char *s;
+ int i;
+
+ s = segbuf;
+ for (i = 0; *s; *s++ == ',' ? i++ : *s);
+ nsegs = i + 1;
+
+ srhlen = 8 + 16 * nsegs;
+
+ srh = calloc(1, srhlen);
+
+ srh->hdrlen = (srhlen >> 3) - 1;
+ srh->type = 3;
+ srh->segments_left = nsegs;
+
+ for (s = strtok(segbuf, ","); s; s = strtok(NULL, ",")) {
+ inet_prefix addr;
+
+ get_addr(&addr, s, AF_INET6);
+ memcpy(&srh->rpl_segaddr[i], addr.data, sizeof(struct in6_addr));
+ i--;
+ }
+
+ return srh;
+}
+
+static int parse_encap_rpl(struct rtattr *rta, size_t len, int *argcp,
+ char ***argvp)
+{
+ struct ipv6_rpl_sr_hdr *srh;
+ char **argv = *argvp;
+ char segbuf[1024] = "";
+ int argc = *argcp;
+ int segs_ok = 0;
+ int ret = 0;
+ int srhlen;
+
+ while (argc > 0) {
+ if (strcmp(*argv, "segs") == 0) {
+ NEXT_ARG();
+ if (segs_ok++)
+ duparg2("segs", *argv);
+
+ strlcpy(segbuf, *argv, 1024);
+ } else {
+ break;
+ }
+ argc--; argv++;
+ }
+
+ srh = parse_rpl_srh(segbuf);
+ srhlen = (srh->hdrlen + 1) << 3;
+
+ if (rta_addattr_l(rta, len, RPL_IPTUNNEL_SRH, srh,
+ srhlen)) {
+ ret = -1;
+ goto out;
+ }
+
+ *argcp = argc + 1;
+ *argvp = argv - 1;
+
+out:
+ free(srh);
+
+ return ret;
+}
+
struct lwt_x {
struct rtattr *rta;
size_t len;
@@ -1537,6 +1645,9 @@ int lwt_parse_encap(struct rtattr *rta, size_t len, int *argcp, char ***argvp,
case LWTUNNEL_ENCAP_SEG6_LOCAL:
ret = parse_encap_seg6local(rta, len, &argc, &argv);
break;
+ case LWTUNNEL_ENCAP_RPL:
+ ret = parse_encap_rpl(rta, len, &argc, &argv);
+ break;
default:
fprintf(stderr, "Error: unsupported encap type\n");
break;
--
2.20.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH iproute2-next 2/2] lwtunnel: add support for rpl segment routing
2020-05-02 22:58 ` [PATCH iproute2-next 2/2] lwtunnel: add support for rpl segment routing Alexander Aring
@ 2020-05-05 16:48 ` David Ahern
0 siblings, 0 replies; 3+ messages in thread
From: David Ahern @ 2020-05-05 16:48 UTC (permalink / raw)
To: Alexander Aring, netdev; +Cc: mcr, stefan
On 5/2/20 4:58 PM, Alexander Aring wrote:
> @@ -162,6 +168,32 @@ static void print_encap_seg6(FILE *fp, struct rtattr *encap)
> print_srh(fp, tuninfo->srh);
> }
>
> +static void print_rpl_srh(FILE *fp, struct ipv6_rpl_sr_hdr *srh)
> +{
> + int i;
> +
> + for (i = srh->segments_left - 1; i >= 0; i--) {
> + print_color_string(PRINT_ANY, COLOR_INET6,
> + NULL, "%s ",
> + rt_addr_n2a(AF_INET6, 16, &srh->rpl_segaddr[i]));
you aren't printing anything for the json case?
^ permalink raw reply [flat|nested] 3+ messages in thread
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2020-05-02 22:58 [PATCH iproute2-next 1/2] uapi: updates to lwtunnel and rpl iptunnel Alexander Aring
2020-05-02 22:58 ` [PATCH iproute2-next 2/2] lwtunnel: add support for rpl segment routing Alexander Aring
2020-05-05 16:48 ` David Ahern
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