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iproute2/ip/iplink_vxlan.c
Amir Vadai aab0f61043 libnetlink: Introduce rta_getattr_be*() 
Add the utility functions rta_getattr_be16() and rta_getattr_be32(), and
change existing code to use it.

Signed-off-by: Amir Vadai <amir@vadai.me>
2016-12-02 14:12:09 -08:00

518 lines
14 KiB
C
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/*
* iplink_vxlan.c VXLAN device support
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Stephen Hemminger <shemminger@vyatta.com
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <net/if.h>
#include <linux/ip.h>
#include <linux/if_link.h>
#include <arpa/inet.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
static void print_explain(FILE *f)
{
fprintf(f, "Usage: ... vxlan id VNI [ { group | remote } IP_ADDRESS ] [ local ADDR ]\n");
fprintf(f, " [ ttl TTL ] [ tos TOS ] [ flowlabel LABEL ] [ dev PHYS_DEV ]\n");
fprintf(f, " [ dstport PORT ] [ srcport MIN MAX ]\n");
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, " [ [no]remcsumtx ] [ [no]remcsumrx ]\n");
fprintf(f, " [ [no]external ] [ gbp ] [ gpe ]\n");
fprintf(f, "\n");
fprintf(f, "Where: VNI := 0-16777215\n");
fprintf(f, " ADDR := { IP_ADDRESS | any }\n");
fprintf(f, " TOS := { NUMBER | inherit }\n");
fprintf(f, " TTL := { 1..255 | inherit }\n");
fprintf(f, " LABEL := 0-1048575\n");
}
static void explain(void)
{
print_explain(stderr);
}
static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
struct nlmsghdr *n)
{
__u32 vni = 0;
int vni_set = 0;
__u32 saddr = 0;
__u32 gaddr = 0;
__u32 daddr = 0;
struct in6_addr saddr6 = IN6ADDR_ANY_INIT;
struct in6_addr gaddr6 = IN6ADDR_ANY_INIT;
struct in6_addr daddr6 = IN6ADDR_ANY_INIT;
unsigned int link = 0;
__u8 tos = 0;
__u8 ttl = 0;
__u32 label = 0;
__u8 learning = 1;
__u8 proxy = 0;
__u8 rsc = 0;
__u8 l2miss = 0;
__u8 l3miss = 0;
__u8 noage = 0;
__u32 age = 0;
__u32 maxaddr = 0;
__u16 dstport = 0;
__u8 udpcsum = 0;
bool udpcsum_set = false;
__u8 udp6zerocsumtx = 0;
bool udp6zerocsumtx_set = false;
__u8 udp6zerocsumrx = 0;
bool udp6zerocsumrx_set = false;
__u8 remcsumtx = 0;
__u8 remcsumrx = 0;
__u8 metadata = 0;
__u8 gbp = 0;
__u8 gpe = 0;
int dst_port_set = 0;
struct ifla_vxlan_port_range range = { 0, 0 };
while (argc > 0) {
if (!matches(*argv, "id") ||
!matches(*argv, "vni")) {
NEXT_ARG();
if (get_u32(&vni, *argv, 0) ||
vni >= 1u << 24)
invarg("invalid id", *argv);
vni_set = 1;
} else if (!matches(*argv, "group")) {
NEXT_ARG();
if (!inet_get_addr(*argv, &gaddr, &gaddr6)) {
fprintf(stderr, "Invalid address \"%s\"\n", *argv);
return -1;
}
if (!IN6_IS_ADDR_MULTICAST(&gaddr6) && !IN_MULTICAST(ntohl(gaddr)))
invarg("invalid group address", *argv);
} else if (!matches(*argv, "remote")) {
NEXT_ARG();
if (!inet_get_addr(*argv, &daddr, &daddr6)) {
fprintf(stderr, "Invalid address \"%s\"\n", *argv);
return -1;
}
if (IN6_IS_ADDR_MULTICAST(&daddr6) || IN_MULTICAST(ntohl(daddr)))
invarg("invalid remote address", *argv);
} else if (!matches(*argv, "local")) {
NEXT_ARG();
if (strcmp(*argv, "any")) {
if (!inet_get_addr(*argv, &saddr, &saddr6)) {
fprintf(stderr, "Invalid address \"%s\"\n", *argv);
return -1;
}
}
if (IN_MULTICAST(ntohl(saddr)) || IN6_IS_ADDR_MULTICAST(&saddr6))
invarg("invalid local address", *argv);
} else if (!matches(*argv, "dev")) {
NEXT_ARG();
link = if_nametoindex(*argv);
if (link == 0) {
fprintf(stderr, "Cannot find device \"%s\"\n",
*argv);
exit(-1);
}
} else if (!matches(*argv, "ttl") ||
!matches(*argv, "hoplimit")) {
unsigned int uval;
NEXT_ARG();
if (strcmp(*argv, "inherit") != 0) {
if (get_unsigned(&uval, *argv, 0))
invarg("invalid TTL", *argv);
if (uval > 255)
invarg("TTL must be <= 255", *argv);
ttl = uval;
}
} else if (!matches(*argv, "tos") ||
!matches(*argv, "dsfield")) {
__u32 uval;
NEXT_ARG();
if (strcmp(*argv, "inherit") != 0) {
if (rtnl_dsfield_a2n(&uval, *argv))
invarg("bad TOS value", *argv);
tos = uval;
} else
tos = 1;
} else if (!matches(*argv, "label") ||
!matches(*argv, "flowlabel")) {
__u32 uval;
NEXT_ARG();
if (get_u32(&uval, *argv, 0) ||
(uval & ~LABEL_MAX_MASK))
invarg("invalid flowlabel", *argv);
label = htonl(uval);
} else if (!matches(*argv, "ageing")) {
NEXT_ARG();
if (strcmp(*argv, "none") == 0)
noage = 1;
else if (get_u32(&age, *argv, 0))
invarg("ageing timer", *argv);
} else if (!matches(*argv, "maxaddress")) {
NEXT_ARG();
if (strcmp(*argv, "unlimited") == 0)
maxaddr = 0;
else if (get_u32(&maxaddr, *argv, 0))
invarg("max addresses", *argv);
} else if (!matches(*argv, "port") ||
!matches(*argv, "srcport")) {
NEXT_ARG();
if (get_be16(&range.low, *argv, 0))
invarg("min port", *argv);
NEXT_ARG();
if (get_be16(&range.high, *argv, 0))
invarg("max port", *argv);
} else if (!matches(*argv, "dstport")) {
NEXT_ARG();
if (get_u16(&dstport, *argv, 0))
invarg("dst port", *argv);
dst_port_set = 1;
} else if (!matches(*argv, "nolearning")) {
learning = 0;
} else if (!matches(*argv, "learning")) {
learning = 1;
} else if (!matches(*argv, "noproxy")) {
proxy = 0;
} else if (!matches(*argv, "proxy")) {
proxy = 1;
} else if (!matches(*argv, "norsc")) {
rsc = 0;
} else if (!matches(*argv, "rsc")) {
rsc = 1;
} else if (!matches(*argv, "nol2miss")) {
l2miss = 0;
} else if (!matches(*argv, "l2miss")) {
l2miss = 1;
} else if (!matches(*argv, "nol3miss")) {
l3miss = 0;
} else if (!matches(*argv, "l3miss")) {
l3miss = 1;
} else if (!matches(*argv, "udpcsum")) {
udpcsum = 1;
udpcsum_set = true;
} else if (!matches(*argv, "noudpcsum")) {
udpcsum = 0;
udpcsum_set = true;
} else if (!matches(*argv, "udp6zerocsumtx")) {
udp6zerocsumtx = 1;
udp6zerocsumtx_set = true;
} else if (!matches(*argv, "noudp6zerocsumtx")) {
udp6zerocsumtx = 0;
udp6zerocsumtx_set = true;
} else if (!matches(*argv, "udp6zerocsumrx")) {
udp6zerocsumrx = 1;
udp6zerocsumrx_set = true;
} else if (!matches(*argv, "noudp6zerocsumrx")) {
udp6zerocsumrx = 0;
udp6zerocsumrx_set = true;
} else if (!matches(*argv, "remcsumtx")) {
remcsumtx = 1;
} else if (!matches(*argv, "noremcsumtx")) {
remcsumtx = 0;
} else if (!matches(*argv, "remcsumrx")) {
remcsumrx = 1;
} else if (!matches(*argv, "noremcsumrx")) {
remcsumrx = 0;
} else if (!matches(*argv, "external")) {
metadata = 1;
learning = 0;
} else if (!matches(*argv, "noexternal")) {
metadata = 0;
} else if (!matches(*argv, "gbp")) {
gbp = 1;
} else if (!matches(*argv, "gpe")) {
gpe = 1;
} else if (matches(*argv, "help") == 0) {
explain();
return -1;
} else {
fprintf(stderr, "vxlan: unknown command \"%s\"?\n", *argv);
explain();
return -1;
}
argc--, argv++;
}
if (metadata && vni_set) {
fprintf(stderr, "vxlan: both 'external' and vni cannot be specified\n");
return -1;
}
if (!metadata && !vni_set) {
fprintf(stderr, "vxlan: missing virtual network identifier\n");
return -1;
}
if ((gaddr && daddr) ||
(!IN6_IS_ADDR_UNSPECIFIED(&gaddr6) &&
!IN6_IS_ADDR_UNSPECIFIED(&daddr6))) {
fprintf(stderr, "vxlan: both group and remote cannot be specified\n");
return -1;
}
if ((gaddr || !IN6_IS_ADDR_UNSPECIFIED(&gaddr6)) && !link) {
fprintf(stderr, "vxlan: 'group' requires 'dev' to be specified\n");
return -1;
}
if (!dst_port_set && gpe) {
dstport = 4790;
} else if (!dst_port_set) {
fprintf(stderr, "vxlan: destination port not specified\n"
"Will use Linux kernel default (non-standard value)\n");
fprintf(stderr,
"Use 'dstport 4789' to get the IANA assigned value\n"
"Use 'dstport 0' to get default and quiet this message\n");
}
addattr32(n, 1024, IFLA_VXLAN_ID, vni);
if (gaddr)
addattr_l(n, 1024, IFLA_VXLAN_GROUP, &gaddr, 4);
else if (daddr)
addattr_l(n, 1024, IFLA_VXLAN_GROUP, &daddr, 4);
if (!IN6_IS_ADDR_UNSPECIFIED(&gaddr6))
addattr_l(n, 1024, IFLA_VXLAN_GROUP6, &gaddr6, sizeof(struct in6_addr));
else if (!IN6_IS_ADDR_UNSPECIFIED(&daddr6))
addattr_l(n, 1024, IFLA_VXLAN_GROUP6, &daddr6, sizeof(struct in6_addr));
if (saddr)
addattr_l(n, 1024, IFLA_VXLAN_LOCAL, &saddr, 4);
else if (!IN6_IS_ADDR_UNSPECIFIED(&saddr6))
addattr_l(n, 1024, IFLA_VXLAN_LOCAL6, &saddr6, sizeof(struct in6_addr));
if (link)
addattr32(n, 1024, IFLA_VXLAN_LINK, link);
addattr32(n, 1024, IFLA_VXLAN_LABEL, label);
addattr8(n, 1024, IFLA_VXLAN_TTL, ttl);
addattr8(n, 1024, IFLA_VXLAN_TOS, tos);
addattr8(n, 1024, IFLA_VXLAN_LEARNING, learning);
addattr8(n, 1024, IFLA_VXLAN_PROXY, proxy);
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_REMCSUM_TX, remcsumtx);
addattr8(n, 1024, IFLA_VXLAN_REMCSUM_RX, remcsumrx);
addattr8(n, 1024, IFLA_VXLAN_COLLECT_METADATA, metadata);
if (udpcsum_set)
addattr8(n, 1024, IFLA_VXLAN_UDP_CSUM, udpcsum);
if (udp6zerocsumtx_set)
addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_TX, udp6zerocsumtx);
if (udp6zerocsumrx_set)
addattr8(n, 1024, IFLA_VXLAN_UDP_ZERO_CSUM6_RX, udp6zerocsumrx);
if (noage)
addattr32(n, 1024, IFLA_VXLAN_AGEING, 0);
else if (age)
addattr32(n, 1024, IFLA_VXLAN_AGEING, age);
if (maxaddr)
addattr32(n, 1024, IFLA_VXLAN_LIMIT, maxaddr);
if (range.low || range.high)
addattr_l(n, 1024, IFLA_VXLAN_PORT_RANGE,
&range, sizeof(range));
if (dstport)
addattr16(n, 1024, IFLA_VXLAN_PORT, htons(dstport));
if (gbp)
addattr_l(n, 1024, IFLA_VXLAN_GBP, NULL, 0);
if (gpe)
addattr_l(n, 1024, IFLA_VXLAN_GPE, NULL, 0);
return 0;
}
static void vxlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
__u32 vni;
unsigned int link;
__u8 tos;
__u32 maxaddr;
char s2[64];
if (!tb)
return;
if (!tb[IFLA_VXLAN_ID] ||
RTA_PAYLOAD(tb[IFLA_VXLAN_ID]) < sizeof(__u32))
return;
vni = rta_getattr_u32(tb[IFLA_VXLAN_ID]);
fprintf(f, "id %u ", vni);
if (tb[IFLA_VXLAN_GROUP]) {
__be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_GROUP]);
if (addr) {
if (IN_MULTICAST(ntohl(addr)))
fprintf(f, "group %s ",
format_host(AF_INET, 4, &addr));
else
fprintf(f, "remote %s ",
format_host(AF_INET, 4, &addr));
}
} else if (tb[IFLA_VXLAN_GROUP6]) {
struct in6_addr addr;
memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_GROUP6]), sizeof(struct in6_addr));
if (!IN6_IS_ADDR_UNSPECIFIED(&addr)) {
if (IN6_IS_ADDR_MULTICAST(&addr))
fprintf(f, "group %s ",
format_host(AF_INET6, sizeof(struct in6_addr), &addr));
else
fprintf(f, "remote %s ",
format_host(AF_INET6, sizeof(struct in6_addr), &addr));
}
}
if (tb[IFLA_VXLAN_LOCAL]) {
__be32 addr = rta_getattr_u32(tb[IFLA_VXLAN_LOCAL]);
if (addr)
fprintf(f, "local %s ",
format_host(AF_INET, 4, &addr));
} else if (tb[IFLA_VXLAN_LOCAL6]) {
struct in6_addr addr;
memcpy(&addr, RTA_DATA(tb[IFLA_VXLAN_LOCAL6]), sizeof(struct in6_addr));
if (!IN6_IS_ADDR_UNSPECIFIED(&addr))
fprintf(f, "local %s ",
format_host(AF_INET6, sizeof(struct in6_addr), &addr));
}
if (tb[IFLA_VXLAN_LINK] &&
(link = rta_getattr_u32(tb[IFLA_VXLAN_LINK]))) {
const char *n = if_indextoname(link, s2);
if (n)
fprintf(f, "dev %s ", n);
else
fprintf(f, "dev %u ", link);
}
if (tb[IFLA_VXLAN_PORT_RANGE]) {
const struct ifla_vxlan_port_range *r
= RTA_DATA(tb[IFLA_VXLAN_PORT_RANGE]);
fprintf(f, "srcport %u %u ", ntohs(r->low), ntohs(r->high));
}
if (tb[IFLA_VXLAN_PORT])
fprintf(f, "dstport %u ",
rta_getattr_be16(tb[IFLA_VXLAN_PORT]));
if (tb[IFLA_VXLAN_LEARNING] &&
!rta_getattr_u8(tb[IFLA_VXLAN_LEARNING]))
fputs("nolearning ", f);
if (tb[IFLA_VXLAN_PROXY] && rta_getattr_u8(tb[IFLA_VXLAN_PROXY]))
fputs("proxy ", f);
if (tb[IFLA_VXLAN_RSC] && rta_getattr_u8(tb[IFLA_VXLAN_RSC]))
fputs("rsc ", f);
if (tb[IFLA_VXLAN_L2MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L2MISS]))
fputs("l2miss ", f);
if (tb[IFLA_VXLAN_L3MISS] && rta_getattr_u8(tb[IFLA_VXLAN_L3MISS]))
fputs("l3miss ", f);
if (tb[IFLA_VXLAN_TOS] &&
(tos = rta_getattr_u8(tb[IFLA_VXLAN_TOS]))) {
if (tos == 1)
fprintf(f, "tos inherit ");
else
fprintf(f, "tos %#x ", tos);
}
if (tb[IFLA_VXLAN_TTL]) {
__u8 ttl = rta_getattr_u8(tb[IFLA_VXLAN_TTL]);
if (ttl)
fprintf(f, "ttl %d ", ttl);
}
if (tb[IFLA_VXLAN_LABEL]) {
__u32 label = rta_getattr_u32(tb[IFLA_VXLAN_LABEL]);
if (label)
fprintf(f, "flowlabel %#x ", ntohl(label));
}
if (tb[IFLA_VXLAN_AGEING]) {
__u32 age = rta_getattr_u32(tb[IFLA_VXLAN_AGEING]);
if (age == 0)
fprintf(f, "ageing none ");
else
fprintf(f, "ageing %u ", age);
}
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]) {
if (!rta_getattr_u8(tb[IFLA_VXLAN_UDP_CSUM]))
fputs("no", f);
fputs("udpcsum ", f);
}
if (tb[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]) {
if (!rta_getattr_u8(tb[IFLA_VXLAN_UDP_ZERO_CSUM6_TX]))
fputs("no", f);
fputs("udp6zerocsumtx ", f);
}
if (tb[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]) {
if (!rta_getattr_u8(tb[IFLA_VXLAN_UDP_ZERO_CSUM6_RX]))
fputs("no", f);
fputs("udp6zerocsumrx ", f);
}
if (tb[IFLA_VXLAN_REMCSUM_TX] &&
rta_getattr_u8(tb[IFLA_VXLAN_REMCSUM_TX]))
fputs("remcsumtx ", f);
if (tb[IFLA_VXLAN_REMCSUM_RX] &&
rta_getattr_u8(tb[IFLA_VXLAN_REMCSUM_RX]))
fputs("remcsumrx ", f);
if (tb[IFLA_VXLAN_COLLECT_METADATA] &&
rta_getattr_u8(tb[IFLA_VXLAN_COLLECT_METADATA]))
fputs("external ", f);
if (tb[IFLA_VXLAN_GBP])
fputs("gbp ", f);
if (tb[IFLA_VXLAN_GPE])
fputs("gpe ", f);
}
static void vxlan_print_help(struct link_util *lu, int argc, char **argv,
FILE *f)
{
print_explain(f);
}
struct link_util vxlan_link_util = {
.id = "vxlan",
.maxattr = IFLA_VXLAN_MAX,
.parse_opt = vxlan_parse_opt,
.print_opt = vxlan_print_opt,
.print_help = vxlan_print_help,
};
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