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Date: Mon, 30 Nov 2015 14:57:28 -0800
From: Tom Herbert <tom@...bertland.com>
To: <shemming@...cade.com>, <netdev@...r.kernel.org>
CC: <kernel-team@...com>, Tom Herbert <tom@...bertland.com>
Subject: [PATCH iproute] ila: Add support for ILA lwtunnels
This patch:
- Adds a utility function for parsing a 64 bit address
- Adds a utility function for converting a 64 bit address to ASCII
- Adds and ILA encap type in lwt tunnels
Signed-off-by: Tom Herbert <tom@...bertland.com>
---
include/utils.h | 3 +++
ip/iproute_lwtunnel.c | 45 +++++++++++++++++++++++++++++++++++++++
lib/utils.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 107 insertions(+)
diff --git a/include/utils.h b/include/utils.h
index 1d35149..96aa020 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -93,6 +93,7 @@ int get_prefix_1(inet_prefix *dst, char *arg, int family);
int get_addr(inet_prefix *dst, const char *arg, int family);
int get_prefix(inet_prefix *dst, char *arg, int family);
int mask2bits(__u32 netmask);
+int get_addr_ila(__u64 *val, const char *arg);
int get_integer(int *val, const char *arg, int base);
int get_unsigned(unsigned *val, const char *arg, int base);
@@ -110,6 +111,8 @@ int get_s8(__s8 *val, const char *arg, int base);
char* hexstring_n2a(const __u8 *str, int len, char *buf, int blen);
__u8* hexstring_a2n(const char *str, __u8 *buf, int blen);
+#define ADDR64_BUF_SIZE sizeof("xxxx:xxxx:xxxx:xxxx")
+int addr64_n2a(__u64 addr, char *buff, size_t len);
int af_bit_len(int af);
int af_byte_len(int af);
diff --git a/ip/iproute_lwtunnel.c b/ip/iproute_lwtunnel.c
index 63322a1..b2764a6 100644
--- a/ip/iproute_lwtunnel.c
+++ b/ip/iproute_lwtunnel.c
@@ -16,6 +16,7 @@
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
+#include <linux/ila.h>
#include <linux/lwtunnel.h>
#include <linux/mpls_iptunnel.h>
#include <errno.h>
@@ -32,6 +33,8 @@ static int read_encap_type(const char *name)
return LWTUNNEL_ENCAP_IP;
else if (strcmp(name, "ip6") == 0)
return LWTUNNEL_ENCAP_IP6;
+ else if (strcmp(name, "ila") == 0)
+ return LWTUNNEL_ENCAP_ILA;
else
return LWTUNNEL_ENCAP_NONE;
}
@@ -45,6 +48,8 @@ static const char *format_encap_type(int type)
return "ip";
case LWTUNNEL_ENCAP_IP6:
return "ip6";
+ case LWTUNNEL_ENCAP_ILA:
+ return "ila";
default:
return "unknown";
}
@@ -95,6 +100,21 @@ static void print_encap_ip(FILE *fp, struct rtattr *encap)
fprintf(fp, "tos %d ", rta_getattr_u8(tb[LWTUNNEL_IP_TOS]));
}
+static void print_encap_ila(FILE *fp, struct rtattr *encap)
+{
+ struct rtattr *tb[ILA_ATTR_MAX+1];
+
+ parse_rtattr_nested(tb, ILA_ATTR_MAX, encap);
+
+ if (tb[ILA_ATTR_LOCATOR]) {
+ char abuf[ADDR64_BUF_SIZE];
+
+ addr64_n2a(*(__u64 *)RTA_DATA(tb[ILA_ATTR_LOCATOR]),
+ abuf, sizeof(abuf));
+ fprintf(fp, " %s ", abuf);
+ }
+}
+
void lwt_print_encap(FILE *fp, struct rtattr *encap_type,
struct rtattr *encap)
{
@@ -114,6 +134,9 @@ void lwt_print_encap(FILE *fp, struct rtattr *encap_type,
case LWTUNNEL_ENCAP_IP:
print_encap_ip(fp, encap);
break;
+ case LWTUNNEL_ENCAP_ILA:
+ print_encap_ila(fp, encap);
+ break;
}
}
@@ -186,6 +209,25 @@ static int parse_encap_ip(struct rtattr *rta, size_t len, int *argcp, char ***ar
return 0;
}
+static int parse_encap_ila(struct rtattr *rta, size_t len,
+ int *argcp, char ***argvp)
+{
+ __u64 locator;
+ int argc = *argcp;
+ char **argv = *argvp;
+
+ if (get_addr64(&locator, *argv) < 0) {
+ fprintf(stderr, "Bad locator: %s\n", *argv);
+ exit(1);
+ }
+
+ rta_addattr64(rta, 1024, ILA_ATTR_LOCATOR, locator);
+
+ *argcp = argc;
+ *argvp = argv;
+
+ return 0;
+}
int lwt_parse_encap(struct rtattr *rta, size_t len, int *argcp, char ***argvp)
{
@@ -213,6 +255,9 @@ int lwt_parse_encap(struct rtattr *rta, size_t len, int *argcp, char ***argvp)
case LWTUNNEL_ENCAP_IP:
parse_encap_ip(rta, len, &argc, &argv);
break;
+ case LWTUNNEL_ENCAP_ILA:
+ parse_encap_ila(rta, len, &argc, &argv);
+ break;
default:
fprintf(stderr, "Error: unsupported encap type\n");
break;
diff --git a/lib/utils.c b/lib/utils.c
index 939a44f..fa35f4d 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -384,6 +384,41 @@ static int get_addr_ipv4(__u8 *ap, const char *cp)
return 1;
}
+int get_addr64(__u64 *ap, const char *cp)
+{
+ int i;
+
+ union {
+ __u16 v16[4];
+ __u64 v64;
+ } val;
+
+ for (i = 0; i < 4; i++) {
+ unsigned long n;
+ char *endp;
+
+ n = strtoul(cp, &endp, 16);
+ if (n > 0xffff)
+ return -1; /* bogus network value */
+
+ if (endp == cp) /* no digits */
+ return -1;
+
+ val.v16[i] = htons(n);
+
+ if (*endp == '\0')
+ break;
+
+ if (i == 3 || *endp != ':')
+ return -1; /* extra characters */
+ cp = endp + 1;
+ }
+
+ *ap = val.v64;
+
+ return 1;
+}
+
int get_addr_1(inet_prefix *addr, const char *name, int family)
{
memset(addr, 0, sizeof(*addr));
@@ -838,6 +873,30 @@ __u8* hexstring_a2n(const char *str, __u8 *buf, int blen)
return buf;
}
+int addr64_n2a(__u64 addr, char *buff, size_t len)
+{
+ __u16 *words = (__u16 *)&addr;
+ __u16 v;
+ int i, ret;
+ size_t written = 0;
+ char *sep = ":";
+
+ for (i = 0; i < 4; i++) {
+ v = ntohs(words[i]);
+
+ if (i == 3)
+ sep = "";
+
+ ret = snprintf(&buff[written], len - written, "%x%s", v, sep);
+ if (ret < 0)
+ return ret;
+
+ written += ret;
+ }
+
+ return written;
+}
+
int print_timestamp(FILE *fp)
{
struct timeval tv;
--
2.4.6
--
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