You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
316 lines
7.0 KiB
316 lines
7.0 KiB
/*
|
|
* m_tunnel_key.c ip tunnel manipulation module
|
|
*
|
|
* 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: Amir Vadai <amir@vadai.me>
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <linux/if_ether.h>
|
|
#include "utils.h"
|
|
#include "rt_names.h"
|
|
#include "tc_util.h"
|
|
#include <linux/tc_act/tc_tunnel_key.h>
|
|
|
|
static void explain(void)
|
|
{
|
|
fprintf(stderr, "Usage: tunnel_key unset\n");
|
|
fprintf(stderr, " tunnel_key set <TUNNEL_KEY>\n");
|
|
fprintf(stderr,
|
|
"Where TUNNEL_KEY is a combination of:\n"
|
|
"id <TUNNELID> (mandatory)\n"
|
|
"src_ip <IP> (mandatory)\n"
|
|
"dst_ip <IP> (mandatory)\n"
|
|
"dst_port <UDP_PORT>\n"
|
|
"csum | nocsum (default is \"csum\")\n");
|
|
}
|
|
|
|
static void usage(void)
|
|
{
|
|
explain();
|
|
exit(-1);
|
|
}
|
|
|
|
static int tunnel_key_parse_ip_addr(const char *str, int addr4_type,
|
|
int addr6_type, struct nlmsghdr *n)
|
|
{
|
|
inet_prefix addr;
|
|
int ret;
|
|
|
|
ret = get_addr(&addr, str, AF_UNSPEC);
|
|
if (ret)
|
|
return ret;
|
|
|
|
addattr_l(n, MAX_MSG, addr.family == AF_INET ? addr4_type : addr6_type,
|
|
addr.data, addr.bytelen);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tunnel_key_parse_key_id(const char *str, int type,
|
|
struct nlmsghdr *n)
|
|
{
|
|
__be32 key_id;
|
|
int ret;
|
|
|
|
ret = get_be32(&key_id, str, 10);
|
|
if (!ret)
|
|
addattr32(n, MAX_MSG, type, key_id);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int tunnel_key_parse_dst_port(char *str, int type, struct nlmsghdr *n)
|
|
{
|
|
int ret;
|
|
__be16 dst_port;
|
|
|
|
ret = get_be16(&dst_port, str, 10);
|
|
if (ret)
|
|
return -1;
|
|
|
|
addattr16(n, MAX_MSG, type, dst_port);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_tunnel_key(struct action_util *a, int *argc_p, char ***argv_p,
|
|
int tca_id, struct nlmsghdr *n)
|
|
{
|
|
struct tc_tunnel_key parm = {};
|
|
char **argv = *argv_p;
|
|
int argc = *argc_p;
|
|
struct rtattr *tail;
|
|
int action = 0;
|
|
int ret;
|
|
int has_src_ip = 0;
|
|
int has_dst_ip = 0;
|
|
int has_key_id = 0;
|
|
int csum = 1;
|
|
|
|
if (matches(*argv, "tunnel_key") != 0)
|
|
return -1;
|
|
|
|
tail = NLMSG_TAIL(n);
|
|
addattr_l(n, MAX_MSG, tca_id, NULL, 0);
|
|
|
|
NEXT_ARG();
|
|
|
|
while (argc > 0) {
|
|
if (matches(*argv, "unset") == 0) {
|
|
if (action) {
|
|
fprintf(stderr, "unexpected \"%s\" - action already specified\n",
|
|
*argv);
|
|
explain();
|
|
return -1;
|
|
}
|
|
action = TCA_TUNNEL_KEY_ACT_RELEASE;
|
|
} else if (matches(*argv, "set") == 0) {
|
|
if (action) {
|
|
fprintf(stderr, "unexpected \"%s\" - action already specified\n",
|
|
*argv);
|
|
explain();
|
|
return -1;
|
|
}
|
|
action = TCA_TUNNEL_KEY_ACT_SET;
|
|
} else if (matches(*argv, "src_ip") == 0) {
|
|
NEXT_ARG();
|
|
ret = tunnel_key_parse_ip_addr(*argv,
|
|
TCA_TUNNEL_KEY_ENC_IPV4_SRC,
|
|
TCA_TUNNEL_KEY_ENC_IPV6_SRC,
|
|
n);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Illegal \"src_ip\"\n");
|
|
return -1;
|
|
}
|
|
has_src_ip = 1;
|
|
} else if (matches(*argv, "dst_ip") == 0) {
|
|
NEXT_ARG();
|
|
ret = tunnel_key_parse_ip_addr(*argv,
|
|
TCA_TUNNEL_KEY_ENC_IPV4_DST,
|
|
TCA_TUNNEL_KEY_ENC_IPV6_DST,
|
|
n);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Illegal \"dst_ip\"\n");
|
|
return -1;
|
|
}
|
|
has_dst_ip = 1;
|
|
} else if (matches(*argv, "id") == 0) {
|
|
NEXT_ARG();
|
|
ret = tunnel_key_parse_key_id(*argv, TCA_TUNNEL_KEY_ENC_KEY_ID, n);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Illegal \"id\"\n");
|
|
return -1;
|
|
}
|
|
has_key_id = 1;
|
|
} else if (matches(*argv, "dst_port") == 0) {
|
|
NEXT_ARG();
|
|
ret = tunnel_key_parse_dst_port(*argv,
|
|
TCA_TUNNEL_KEY_ENC_DST_PORT, n);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "Illegal \"dst port\"\n");
|
|
return -1;
|
|
}
|
|
} else if (matches(*argv, "csum") == 0) {
|
|
csum = 1;
|
|
} else if (matches(*argv, "nocsum") == 0) {
|
|
csum = 0;
|
|
} else if (matches(*argv, "help") == 0) {
|
|
usage();
|
|
} else {
|
|
break;
|
|
}
|
|
NEXT_ARG_FWD();
|
|
}
|
|
|
|
addattr8(n, MAX_MSG, TCA_TUNNEL_KEY_NO_CSUM, !csum);
|
|
|
|
parse_action_control_dflt(&argc, &argv, &parm.action,
|
|
false, TC_ACT_PIPE);
|
|
|
|
if (argc) {
|
|
if (matches(*argv, "index") == 0) {
|
|
NEXT_ARG();
|
|
if (get_u32(&parm.index, *argv, 10)) {
|
|
fprintf(stderr, "tunnel_key: Illegal \"index\"\n");
|
|
return -1;
|
|
}
|
|
|
|
NEXT_ARG_FWD();
|
|
}
|
|
}
|
|
|
|
if (action == TCA_TUNNEL_KEY_ACT_SET &&
|
|
(!has_src_ip || !has_dst_ip || !has_key_id)) {
|
|
fprintf(stderr, "set needs tunnel_key parameters\n");
|
|
explain();
|
|
return -1;
|
|
}
|
|
|
|
parm.t_action = action;
|
|
addattr_l(n, MAX_MSG, TCA_TUNNEL_KEY_PARMS, &parm, sizeof(parm));
|
|
tail->rta_len = (char *)NLMSG_TAIL(n) - (char *)tail;
|
|
|
|
*argc_p = argc;
|
|
*argv_p = argv;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tunnel_key_print_ip_addr(FILE *f, const char *name,
|
|
struct rtattr *attr)
|
|
{
|
|
int family;
|
|
size_t len;
|
|
|
|
if (!attr)
|
|
return;
|
|
|
|
len = RTA_PAYLOAD(attr);
|
|
|
|
if (len == 4)
|
|
family = AF_INET;
|
|
else if (len == 16)
|
|
family = AF_INET6;
|
|
else
|
|
return;
|
|
|
|
fprintf(f, "\n\t%s %s", name, rt_addr_n2a_rta(family, attr));
|
|
}
|
|
|
|
static void tunnel_key_print_key_id(FILE *f, const char *name,
|
|
struct rtattr *attr)
|
|
{
|
|
if (!attr)
|
|
return;
|
|
fprintf(f, "\n\t%s %d", name, rta_getattr_be32(attr));
|
|
}
|
|
|
|
static void tunnel_key_print_dst_port(FILE *f, char *name,
|
|
struct rtattr *attr)
|
|
{
|
|
if (!attr)
|
|
return;
|
|
fprintf(f, "\n\t%s %d", name, rta_getattr_be16(attr));
|
|
}
|
|
|
|
static void tunnel_key_print_flag(FILE *f, const char *name_on,
|
|
const char *name_off,
|
|
struct rtattr *attr)
|
|
{
|
|
if (!attr)
|
|
return;
|
|
fprintf(f, "\n\t%s", rta_getattr_u8(attr) ? name_on : name_off);
|
|
}
|
|
|
|
static int print_tunnel_key(struct action_util *au, FILE *f, struct rtattr *arg)
|
|
{
|
|
struct rtattr *tb[TCA_TUNNEL_KEY_MAX + 1];
|
|
struct tc_tunnel_key *parm;
|
|
|
|
if (!arg)
|
|
return -1;
|
|
|
|
parse_rtattr_nested(tb, TCA_TUNNEL_KEY_MAX, arg);
|
|
|
|
if (!tb[TCA_TUNNEL_KEY_PARMS]) {
|
|
fprintf(f, "[NULL tunnel_key parameters]");
|
|
return -1;
|
|
}
|
|
parm = RTA_DATA(tb[TCA_TUNNEL_KEY_PARMS]);
|
|
|
|
fprintf(f, "tunnel_key");
|
|
|
|
switch (parm->t_action) {
|
|
case TCA_TUNNEL_KEY_ACT_RELEASE:
|
|
fprintf(f, " unset");
|
|
break;
|
|
case TCA_TUNNEL_KEY_ACT_SET:
|
|
fprintf(f, " set");
|
|
tunnel_key_print_ip_addr(f, "src_ip",
|
|
tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
|
|
tunnel_key_print_ip_addr(f, "dst_ip",
|
|
tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);
|
|
tunnel_key_print_ip_addr(f, "src_ip",
|
|
tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
|
|
tunnel_key_print_ip_addr(f, "dst_ip",
|
|
tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);
|
|
tunnel_key_print_key_id(f, "key_id",
|
|
tb[TCA_TUNNEL_KEY_ENC_KEY_ID]);
|
|
tunnel_key_print_dst_port(f, "dst_port",
|
|
tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
|
|
tunnel_key_print_flag(f, "nocsum", "csum",
|
|
tb[TCA_TUNNEL_KEY_NO_CSUM]);
|
|
break;
|
|
}
|
|
print_action_control(f, " ", parm->action, "");
|
|
|
|
fprintf(f, "\n\tindex %d ref %d bind %d", parm->index, parm->refcnt,
|
|
parm->bindcnt);
|
|
|
|
if (show_stats) {
|
|
if (tb[TCA_TUNNEL_KEY_TM]) {
|
|
struct tcf_t *tm = RTA_DATA(tb[TCA_TUNNEL_KEY_TM]);
|
|
|
|
print_tm(f, tm);
|
|
}
|
|
}
|
|
|
|
fprintf(f, "\n ");
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct action_util tunnel_key_action_util = {
|
|
.id = "tunnel_key",
|
|
.parse_aopt = parse_tunnel_key,
|
|
.print_aopt = print_tunnel_key,
|
|
};
|