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/*
* m_skbedit.c SKB Editing module
*
* Copyright (c) 2008, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses>.
*
* Authors: Alexander Duyck <alexander.h.duyck@intel.com>
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "utils.h"
#include "tc_util.h"
#include <linux/tc_act/tc_skbedit.h>
#include <linux/if_packet.h>
static void explain(void)
{
fprintf(stderr, "Usage: ... skbedit <[QM] [PM] [MM] [PT]>\n"
"QM = queue_mapping QUEUE_MAPPING\n"
"PM = priority PRIORITY\n"
"MM = mark MARK\n"
"PT = ptype PACKETYPE\n"
"PACKETYPE = is one of:\n"
" host, otherhost, broadcast, multicast\n"
"QUEUE_MAPPING = device transmit queue to use\n"
"PRIORITY = classID to assign to priority field\n"
"MARK = firewall mark to set\n");
}
static void
usage(void)
{
explain();
exit(-1);
}
static int
parse_skbedit(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 rtattr *tail;
unsigned int tmp;
__u16 queue_mapping, ptype;
__u32 flags = 0, priority, mark;
struct tc_skbedit sel = { 0 };
if (matches(*argv, "skbedit") != 0)
return -1;
NEXT_ARG();
while (argc > 0) {
if (matches(*argv, "queue_mapping") == 0) {
flags |= SKBEDIT_F_QUEUE_MAPPING;
NEXT_ARG();
if (get_unsigned(&tmp, *argv, 10) || tmp > 65535) {
fprintf(stderr, "Illegal queue_mapping\n");
return -1;
}
queue_mapping = tmp;
ok++;
} else if (matches(*argv, "priority") == 0) {
flags |= SKBEDIT_F_PRIORITY;
NEXT_ARG();
if (get_tc_classid(&priority, *argv)) {
fprintf(stderr, "Illegal priority\n");
return -1;
}
ok++;
} else if (matches(*argv, "mark") == 0) {
flags |= SKBEDIT_F_MARK;
NEXT_ARG();
if (get_u32(&mark, *argv, 0)) {
fprintf(stderr, "Illegal mark\n");
return -1;
}
ok++;
} else if (matches(*argv, "ptype") == 0) {
NEXT_ARG();
if (matches(*argv, "host") == 0) {
ptype = PACKET_HOST;
} else if (matches(*argv, "broadcast") == 0) {
ptype = PACKET_BROADCAST;
} else if (matches(*argv, "multicast") == 0) {
ptype = PACKET_MULTICAST;
} else if (matches(*argv, "otherhost") == 0) {
ptype = PACKET_OTHERHOST;
} else {
fprintf(stderr, "Illegal ptype (%s)\n",
*argv);
return -1;
}
flags |= SKBEDIT_F_PTYPE;
ok++;
} else if (matches(*argv, "help") == 0) {
usage();
} else {
break;
}
argc--;
argv++;
}
parse_action_control_dflt(&argc, &argv, &sel.action,
false, TC_ACT_PIPE);
if (argc) {
if (matches(*argv, "index") == 0) {
NEXT_ARG();
if (get_u32(&sel.index, *argv, 10)) {
fprintf(stderr, "Pedit: Illegal \"index\"\n");
return -1;
}
argc--;
argv++;
ok++;
}
}
if (!ok) {
explain();
return -1;
}
tail = NLMSG_TAIL(n);
addattr_l(n, MAX_MSG, tca_id, NULL, 0);
addattr_l(n, MAX_MSG, TCA_SKBEDIT_PARMS, &sel, sizeof(sel));
if (flags & SKBEDIT_F_QUEUE_MAPPING)
addattr_l(n, MAX_MSG, TCA_SKBEDIT_QUEUE_MAPPING,
&queue_mapping, sizeof(queue_mapping));
if (flags & SKBEDIT_F_PRIORITY)
addattr_l(n, MAX_MSG, TCA_SKBEDIT_PRIORITY,
&priority, sizeof(priority));
if (flags & SKBEDIT_F_MARK)
addattr_l(n, MAX_MSG, TCA_SKBEDIT_MARK,
&mark, sizeof(mark));
if (flags & SKBEDIT_F_PTYPE)
addattr_l(n, MAX_MSG, TCA_SKBEDIT_PTYPE,
&ptype, sizeof(ptype));
tail->rta_len = (char *)NLMSG_TAIL(n) - (char *)tail;
*argc_p = argc;
*argv_p = argv;
return 0;
}
static int print_skbedit(struct action_util *au, FILE *f, struct rtattr *arg)
{
struct rtattr *tb[TCA_SKBEDIT_MAX + 1];
SPRINT_BUF(b1);
__u32 *priority;
__u32 *mark;
__u16 *queue_mapping, *ptype;
struct tc_skbedit *p = NULL;
if (arg == NULL)
return -1;
parse_rtattr_nested(tb, TCA_SKBEDIT_MAX, arg);
if (tb[TCA_SKBEDIT_PARMS] == NULL) {
fprintf(f, "[NULL skbedit parameters]");
return -1;
}
p = RTA_DATA(tb[TCA_SKBEDIT_PARMS]);
fprintf(f, " skbedit");
if (tb[TCA_SKBEDIT_QUEUE_MAPPING] != NULL) {
queue_mapping = RTA_DATA(tb[TCA_SKBEDIT_QUEUE_MAPPING]);
fprintf(f, " queue_mapping %u", *queue_mapping);
}
if (tb[TCA_SKBEDIT_PRIORITY] != NULL) {
priority = RTA_DATA(tb[TCA_SKBEDIT_PRIORITY]);
fprintf(f, " priority %s", sprint_tc_classid(*priority, b1));
}
if (tb[TCA_SKBEDIT_MARK] != NULL) {
mark = RTA_DATA(tb[TCA_SKBEDIT_MARK]);
fprintf(f, " mark %d", *mark);
}
if (tb[TCA_SKBEDIT_PTYPE] != NULL) {
ptype = RTA_DATA(tb[TCA_SKBEDIT_PTYPE]);
if (*ptype == PACKET_HOST)
fprintf(f, " ptype host");
else if (*ptype == PACKET_BROADCAST)
fprintf(f, " ptype broadcast");
else if (*ptype == PACKET_MULTICAST)
fprintf(f, " ptype multicast");
else if (*ptype == PACKET_OTHERHOST)
fprintf(f, " ptype otherhost");
else
fprintf(f, " ptype %d", *ptype);
}
print_action_control(f, " ", p->action, "");
fprintf(f, "\n\t index %u ref %d bind %d",
p->index, p->refcnt, p->bindcnt);
if (show_stats) {
if (tb[TCA_SKBEDIT_TM]) {
struct tcf_t *tm = RTA_DATA(tb[TCA_SKBEDIT_TM]);
print_tm(f, tm);
}
}
fprintf(f, "\n ");
return 0;
}
struct action_util skbedit_action_util = {
.id = "skbedit",
.parse_aopt = parse_skbedit,
.print_aopt = print_skbedit,
};
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