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/*
* iplink_amt.c AMT 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: Taehee Yoo <ap420073@gmail.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 <linux/amt.h>
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
#define AMT_ATTRSET(attrs, type) (((attrs) & (1L << (type))) != 0)
static void print_usage(FILE *f)
{
fprintf(f,
"Usage: ... amt\n"
" [ discovery IP_ADDRESS ]\n"
" [ mode MODE ]\n"
" [ local ADDR ]\n"
" [ dev PHYS_DEV ]\n"
" [ relay_port PORT ]\n"
" [ gateway_port PORT ]\n"
" [ max_tunnels NUMBER ]\n"
"\n"
"Where: ADDR := { IP_ADDRESS }\n"
" MODE := { gateway | relay }\n"
);
}
static char *modename[] = {"gateway", "relay"};
static void usage(void)
{
print_usage(stderr);
}
static void check_duparg(__u64 *attrs, int type, const char *key,
const char *argv)
{
if (!AMT_ATTRSET(*attrs, type)) {
*attrs |= (1L << type);
return;
}
duparg2(key, argv);
}
static int amt_parse_opt(struct link_util *lu, int argc, char **argv,
struct nlmsghdr *n)
{
unsigned int mode, max_tunnels;
inet_prefix saddr, daddr;
__u64 attrs = 0;
__u16 port;
saddr.family = daddr.family = AF_UNSPEC;
inet_prefix_reset(&saddr);
inet_prefix_reset(&daddr);
while (argc > 0) {
if (strcmp(*argv, "mode") == 0) {
NEXT_ARG();
if (strcmp(*argv, "gateway") == 0) {
mode = 0;
} else if (strcmp(*argv, "relay") == 0) {
mode = 1;
} else {
usage();
return -1;
}
addattr32(n, 1024, IFLA_AMT_MODE, mode);
} else if (strcmp(*argv, "relay_port") == 0) {
NEXT_ARG();
if (get_u16(&port, *argv, 0))
invarg("relay_port", *argv);
addattr16(n, 1024, IFLA_AMT_RELAY_PORT, htons(port));
} else if (strcmp(*argv, "gateway_port") == 0) {
NEXT_ARG();
if (get_u16(&port, *argv, 0))
invarg("gateway_port", *argv);
addattr16(n, 1024, IFLA_AMT_GATEWAY_PORT, htons(port));
} else if (strcmp(*argv, "max_tunnels") == 0) {
NEXT_ARG();
if (get_u32(&max_tunnels, *argv, 0))
invarg("max_tunnels", *argv);
addattr32(n, 1024, IFLA_AMT_MAX_TUNNELS, max_tunnels);
} else if (strcmp(*argv, "dev") == 0) {
unsigned int link;
NEXT_ARG();
link = ll_name_to_index(*argv);
if (!link)
exit(nodev(*argv));
addattr32(n, 1024, IFLA_AMT_LINK, link);
} else if (strcmp(*argv, "local") == 0) {
NEXT_ARG();
check_duparg(&attrs, IFLA_AMT_LOCAL_IP, "local", *argv);
get_addr(&saddr, *argv, daddr.family);
if (is_addrtype_inet(&saddr))
addattr_l(n, 1024, IFLA_AMT_LOCAL_IP,
saddr.data, saddr.bytelen);
} else if (strcmp(*argv, "discovery") == 0) {
NEXT_ARG();
check_duparg(&attrs, IFLA_AMT_DISCOVERY_IP,
"discovery", *argv);
get_addr(&daddr, *argv, daddr.family);
if (is_addrtype_inet(&daddr))
addattr_l(n, 1024, IFLA_AMT_DISCOVERY_IP,
daddr.data, daddr.bytelen);
} else if (strcmp(*argv, "help") == 0) {
usage();
return -1;
} else {
fprintf(stderr, "amt: unknown command \"%s\"?\n", *argv);
usage();
return -1;
}
argc--, argv++;
}
return 0;
}
static void amt_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
{
if (!tb)
return;
if (tb[IFLA_AMT_MODE])
print_string(PRINT_ANY, "mode", "%s ",
modename[rta_getattr_u32(tb[IFLA_AMT_MODE])]);
if (tb[IFLA_AMT_GATEWAY_PORT])
print_uint(PRINT_ANY, "gateway_port", "gateway_port %u ",
rta_getattr_be16(tb[IFLA_AMT_GATEWAY_PORT]));
if (tb[IFLA_AMT_RELAY_PORT])
print_uint(PRINT_ANY, "relay_port", "relay_port %u ",
rta_getattr_be16(tb[IFLA_AMT_RELAY_PORT]));
if (tb[IFLA_AMT_LOCAL_IP]) {
__be32 addr = rta_getattr_u32(tb[IFLA_AMT_LOCAL_IP]);
print_string(PRINT_ANY, "local", "local %s ",
format_host(AF_INET, 4, &addr));
}
if (tb[IFLA_AMT_REMOTE_IP]) {
__be32 addr = rta_getattr_u32(tb[IFLA_AMT_REMOTE_IP]);
print_string(PRINT_ANY, "remote", "remote %s ",
format_host(AF_INET, 4, &addr));
}
if (tb[IFLA_AMT_DISCOVERY_IP]) {
__be32 addr = rta_getattr_u32(tb[IFLA_AMT_DISCOVERY_IP]);
print_string(PRINT_ANY, "discovery", "discovery %s ",
format_host(AF_INET, 4, &addr));
}
if (tb[IFLA_AMT_LINK]) {
unsigned int link = rta_getattr_u32(tb[IFLA_AMT_LINK]);
print_string(PRINT_ANY, "link", "dev %s ",
ll_index_to_name(link));
}
if (tb[IFLA_AMT_MAX_TUNNELS])
print_uint(PRINT_ANY, "max_tunnels", "max_tunnels %u ",
rta_getattr_u32(tb[IFLA_AMT_MAX_TUNNELS]));
}
static void amt_print_help(struct link_util *lu, int argc, char **argv, FILE *f)
{
print_usage(f);
}
struct link_util amt_link_util = {
.id = "amt",
.maxattr = IFLA_AMT_MAX,
.parse_opt = amt_parse_opt,
.print_opt = amt_print_opt,
.print_help = amt_print_help,
};
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