blob: 6a85e087ede1cc2c4085d0c51abb54218fc257aa [file] [log] [blame]
/*
* m_ife.c IFE actions module
*
* This program is free software; you can distribute 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: J Hadi Salim (jhs@mojatatu.com)
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <linux/netdevice.h>
#include "rt_names.h"
#include "utils.h"
#include "tc_util.h"
#include <linux/tc_act/tc_ife.h>
static void ife_explain(void)
{
fprintf(stderr,
"Usage:... ife {decode|encode} [{ALLOW|USE} ATTR] [dst DMAC] [src SMAC] [type TYPE] [CONTROL] [index INDEX]\n"
"\tALLOW := Encode direction. Allows encoding specified metadata\n"
"\t\t e.g \"allow mark\"\n"
"\tUSE := Encode direction. Enforce Static encoding of specified metadata\n"
"\t\t e.g \"use mark 0x12\"\n"
"\tATTR := mark (32-bit), prio (32-bit), tcindex (16-bit)\n"
"\tDMAC := 6 byte Destination MAC address to encode\n"
"\tSMAC := optional 6 byte Source MAC address to encode\n"
"\tTYPE := optional 16 bit ethertype to encode\n"
"\tCONTROL := reclassify|pipe|drop|continue|ok\n"
"\tINDEX := optional IFE table index value used\n"
"encode is used for sending IFE packets\n"
"decode is used for receiving IFE packets\n");
}
static void ife_usage(void)
{
ife_explain();
exit(-1);
}
static int parse_ife(struct action_util *a, int *argc_p, char ***argv_p,
int tca_id, struct nlmsghdr *n)
{
int argc = *argc_p;
char **argv = *argv_p;
int ok = 0;
struct tc_ife p = { 0 };
struct rtattr *tail;
struct rtattr *tail2;
char dbuf[ETH_ALEN];
char sbuf[ETH_ALEN];
__u16 ife_type = 0;
int user_type = 0;
__u32 ife_prio = 0;
__u32 ife_prio_v = 0;
__u32 ife_mark = 0;
__u32 ife_mark_v = 0;
__u16 ife_tcindex = 0;
__u16 ife_tcindex_v = 0;
char *daddr = NULL;
char *saddr = NULL;
if (argc <= 0)
return -1;
while (argc > 0) {
if (matches(*argv, "ife") == 0) {
NEXT_ARG();
continue;
} else if (matches(*argv, "decode") == 0) {
p.flags = IFE_DECODE; /* readability aid */
ok++;
} else if (matches(*argv, "encode") == 0) {
p.flags = IFE_ENCODE;
ok++;
} else if (matches(*argv, "allow") == 0) {
NEXT_ARG();
if (matches(*argv, "mark") == 0) {
ife_mark = IFE_META_SKBMARK;
} else if (matches(*argv, "prio") == 0) {
ife_prio = IFE_META_PRIO;
} else if (matches(*argv, "tcindex") == 0) {
ife_tcindex = IFE_META_TCINDEX;
} else {
invarg("Illegal meta define", *argv);
}
} else if (matches(*argv, "use") == 0) {
NEXT_ARG();
if (matches(*argv, "mark") == 0) {
NEXT_ARG();
if (get_u32(&ife_mark_v, *argv, 0))
invarg("ife mark val is invalid",
*argv);
} else if (matches(*argv, "prio") == 0) {
NEXT_ARG();
if (get_u32(&ife_prio_v, *argv, 0))
invarg("ife prio val is invalid",
*argv);
} else if (matches(*argv, "tcindex") == 0) {
NEXT_ARG();
if (get_u16(&ife_tcindex_v, *argv, 0))
invarg("ife tcindex val is invalid",
*argv);
} else {
invarg("Illegal meta use type", *argv);
}
} else if (matches(*argv, "type") == 0) {
NEXT_ARG();
if (get_u16(&ife_type, *argv, 0))
invarg("ife type is invalid", *argv);
fprintf(stderr, "IFE type 0x%04X\n", ife_type);
user_type = 1;
} else if (matches(*argv, "dst") == 0) {
NEXT_ARG();
daddr = *argv;
if (sscanf(daddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
dbuf, dbuf + 1, dbuf + 2,
dbuf + 3, dbuf + 4, dbuf + 5) != 6) {
invarg("Invalid mac address", *argv);
}
fprintf(stderr, "dst MAC address <%s>\n", daddr);
} else if (matches(*argv, "src") == 0) {
NEXT_ARG();
saddr = *argv;
if (sscanf(saddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
sbuf, sbuf + 1, sbuf + 2,
sbuf + 3, sbuf + 4, sbuf + 5) != 6) {
invarg("Invalid mac address", *argv);
}
fprintf(stderr, "src MAC address <%s>\n", saddr);
} else if (matches(*argv, "help") == 0) {
ife_usage();
} else {
break;
}
argc--;
argv++;
}
parse_action_control_dflt(&argc, &argv, &p.action, false, TC_ACT_PIPE);
if (argc) {
if (matches(*argv, "index") == 0) {
NEXT_ARG();
if (get_u32(&p.index, *argv, 0)) {
fprintf(stderr, "ife: Illegal \"index\"\n");
return -1;
}
ok++;
argc--;
argv++;
}
}
if (!ok) {
fprintf(stderr, "IFE requires decode/encode specified\n");
ife_usage();
}
tail = addattr_nest(n, MAX_MSG, tca_id);
addattr_l(n, MAX_MSG, TCA_IFE_PARMS, &p, sizeof(p));
if (!(p.flags & IFE_ENCODE))
goto skip_encode;
if (daddr)
addattr_l(n, MAX_MSG, TCA_IFE_DMAC, dbuf, ETH_ALEN);
if (user_type)
addattr_l(n, MAX_MSG, TCA_IFE_TYPE, &ife_type, 2);
else
fprintf(stderr, "IFE type 0x%04X\n", ETH_P_IFE);
if (saddr)
addattr_l(n, MAX_MSG, TCA_IFE_SMAC, sbuf, ETH_ALEN);
tail2 = addattr_nest(n, MAX_MSG, TCA_IFE_METALST);
if (ife_mark || ife_mark_v) {
if (ife_mark_v)
addattr_l(n, MAX_MSG, IFE_META_SKBMARK, &ife_mark_v, 4);
else
addattr_l(n, MAX_MSG, IFE_META_SKBMARK, NULL, 0);
}
if (ife_prio || ife_prio_v) {
if (ife_prio_v)
addattr_l(n, MAX_MSG, IFE_META_PRIO, &ife_prio_v, 4);
else
addattr_l(n, MAX_MSG, IFE_META_PRIO, NULL, 0);
}
if (ife_tcindex || ife_tcindex_v) {
if (ife_tcindex_v)
addattr_l(n, MAX_MSG, IFE_META_TCINDEX, &ife_tcindex_v,
2);
else
addattr_l(n, MAX_MSG, IFE_META_TCINDEX, NULL, 0);
}
addattr_nest_end(n, tail2);
skip_encode:
addattr_nest_end(n, tail);
*argc_p = argc;
*argv_p = argv;
return 0;
}
static int print_ife(struct action_util *au, FILE *f, struct rtattr *arg)
{
struct tc_ife *p;
struct rtattr *tb[TCA_IFE_MAX + 1];
__u16 ife_type = 0;
__u32 mmark = 0;
__u16 mtcindex = 0;
__u32 mprio = 0;
int has_optional = 0;
SPRINT_BUF(b2);
if (arg == NULL)
return -1;
parse_rtattr_nested(tb, TCA_IFE_MAX, arg);
if (tb[TCA_IFE_PARMS] == NULL) {
fprintf(stderr, "Missing ife parameters\n");
return -1;
}
p = RTA_DATA(tb[TCA_IFE_PARMS]);
print_string(PRINT_ANY, "kind", "%s ", "ife");
print_string(PRINT_ANY, "mode", "%s ",
p->flags & IFE_ENCODE ? "encode" : "decode");
print_action_control(f, "action ", p->action, " ");
if (tb[TCA_IFE_TYPE]) {
ife_type = rta_getattr_u16(tb[TCA_IFE_TYPE]);
has_optional = 1;
print_0xhex(PRINT_ANY, "type", "type %#llX ", ife_type);
}
if (has_optional)
print_string(PRINT_FP, NULL, "%s\t", _SL_);
if (tb[TCA_IFE_METALST]) {
struct rtattr *metalist[IFE_META_MAX + 1];
int len = 0;
parse_rtattr_nested(metalist, IFE_META_MAX,
tb[TCA_IFE_METALST]);
if (metalist[IFE_META_SKBMARK]) {
len = RTA_PAYLOAD(metalist[IFE_META_SKBMARK]);
if (len) {
mmark = rta_getattr_u32(metalist[IFE_META_SKBMARK]);
print_uint(PRINT_ANY, "mark", "use mark %u ",
mmark);
} else
print_string(PRINT_ANY, "mark", "%s mark ",
"allow");
}
if (metalist[IFE_META_TCINDEX]) {
len = RTA_PAYLOAD(metalist[IFE_META_TCINDEX]);
if (len) {
mtcindex =
rta_getattr_u16(metalist[IFE_META_TCINDEX]);
print_uint(PRINT_ANY, "tcindex",
"use tcindex %u ", mtcindex);
} else
print_string(PRINT_ANY, "tcindex",
"%s tcindex ", "allow");
}
if (metalist[IFE_META_PRIO]) {
len = RTA_PAYLOAD(metalist[IFE_META_PRIO]);
if (len) {
mprio = rta_getattr_u32(metalist[IFE_META_PRIO]);
print_uint(PRINT_ANY, "prio", "use prio %u ",
mprio);
} else
print_string(PRINT_ANY, "prio", "%s prio ",
"allow");
}
}
if (tb[TCA_IFE_DMAC]) {
has_optional = 1;
print_string(PRINT_ANY, "dst", "dst %s ",
ll_addr_n2a(RTA_DATA(tb[TCA_IFE_DMAC]),
RTA_PAYLOAD(tb[TCA_IFE_DMAC]), 0, b2,
sizeof(b2)));
}
if (tb[TCA_IFE_SMAC]) {
has_optional = 1;
print_string(PRINT_ANY, "src", "src %s ",
ll_addr_n2a(RTA_DATA(tb[TCA_IFE_SMAC]),
RTA_PAYLOAD(tb[TCA_IFE_SMAC]), 0, b2,
sizeof(b2)));
}
print_nl();
print_uint(PRINT_ANY, "index", "\t index %u", p->index);
print_int(PRINT_ANY, "ref", " ref %d", p->refcnt);
print_int(PRINT_ANY, "bind", " bind %d", p->bindcnt);
if (show_stats) {
if (tb[TCA_IFE_TM]) {
struct tcf_t *tm = RTA_DATA(tb[TCA_IFE_TM]);
print_tm(f, tm);
}
}
print_nl();
return 0;
}
struct action_util ife_action_util = {
.id = "ife",
.parse_aopt = parse_ife,
.print_aopt = print_ife,
};