mirred.c

/* SPDX-License-Identifier: LGPL-2.1-only */
/*
 * Copyright (c) 2013 Cong Wang <xiyou.wangcong@gmail.com>
 */
 
/**
 * @ingroup act
 * @defgroup act_mirred Mirror and Redirect
 *
 * @{
 */
 
#include <netlink-private/netlink.h>
#include <netlink-private/tc.h>
#include <netlink/netlink.h>
#include <netlink/attr.h>
#include <netlink/utils.h>
#include <netlink-private/route/tc-api.h>
#include <netlink/route/act/mirred.h>
 
static struct nla_policy mirred_policy[TCA_MIRRED_MAX + 1] = {
        [TCA_MIRRED_PARMS]      = { .minlen = sizeof(struct tc_mirred) },
};
 
static int mirred_msg_parser(struct rtnl_tc *tc, void *data)
{
        struct rtnl_mirred *u = data;
        struct nlattr *tb[TCA_MIRRED_MAX + 1];
        int err;
 
        err = tca_parse(tb, TCA_MIRRED_MAX, tc, mirred_policy);
        if (err < 0)
                return err;
 
        if (!tb[TCA_MIRRED_PARMS])
                return -NLE_MISSING_ATTR;
 
        nla_memcpy(&u->m_parm, tb[TCA_MIRRED_PARMS], sizeof(u->m_parm));
        return 0;
}
 
static void mirred_free_data(struct rtnl_tc *tc, void *data)
{
}
 
static void mirred_dump_line(struct rtnl_tc *tc, void *data,
                          struct nl_dump_params *p)
{
        struct rtnl_mirred *u = data;
        if (!u)
                return;
 
        nl_dump(p, " index %u", u->m_parm.ifindex);
 
        if (u->m_parm.eaction == TCA_EGRESS_MIRROR)
                nl_dump(p, " egress mirror");
        else if (u->m_parm.eaction == TCA_EGRESS_REDIR)
                nl_dump(p, " egress redirect");
 
        switch(u->m_parm.action) {
        case TC_ACT_UNSPEC:
                nl_dump(p, " unspecified");
                break;
        case TC_ACT_PIPE:
                nl_dump(p, " pipe");
                break;
        case TC_ACT_STOLEN:
                nl_dump(p, " stolen");
                break;
        case TC_ACT_SHOT:
                nl_dump(p, " shot");
                break;
        case TC_ACT_QUEUED:
                nl_dump(p, " queued");
                break;
        case TC_ACT_REPEAT:
                nl_dump(p, " repeat");
                break;
        }
}
 
static void mirred_dump_details(struct rtnl_tc *tc, void *data,
                             struct nl_dump_params *p)
{
}
 
static void mirred_dump_stats(struct rtnl_tc *tc, void *data,
                           struct nl_dump_params *p)
{
        struct rtnl_mirred *u = data;
 
        if (!u)
                return;
        /* TODO */
}
 
 
static int mirred_msg_fill(struct rtnl_tc *tc, void *data, struct nl_msg *msg)
{
        struct rtnl_mirred *u = data;
 
        if (!u)
                return 0;
 
        NLA_PUT(msg, TCA_MIRRED_PARMS, sizeof(u->m_parm), &u->m_parm);
        return 0;
 
nla_put_failure:
        return -NLE_NOMEM;
}
 
/**
 * @name Attribute Modifications
 * @{
 */
 
int rtnl_mirred_set_action(struct rtnl_act *act, int action)
{
        struct rtnl_mirred *u;
 
        if (!(u = (struct rtnl_mirred *) rtnl_tc_data(TC_CAST(act))))
                return -NLE_NOMEM;
 
        if (action > TCA_INGRESS_MIRROR || action < TCA_EGRESS_REDIR)
                return -NLE_INVAL;
 
        switch (action) {
        case TCA_EGRESS_MIRROR:
        case TCA_EGRESS_REDIR:
                u->m_parm.eaction = action;
                break;
        case TCA_INGRESS_REDIR:
        case TCA_INGRESS_MIRROR:
        default:
                return NLE_OPNOTSUPP;
        }
        return 0;
}
 
int rtnl_mirred_get_action(struct rtnl_act *act)
{
        struct rtnl_mirred *u;
 
        if (!(u = (struct rtnl_mirred *) rtnl_tc_data(TC_CAST(act))))
                return -NLE_NOMEM;
        return u->m_parm.eaction;
}
 
int rtnl_mirred_set_ifindex(struct rtnl_act *act, uint32_t ifindex)
{
        struct rtnl_mirred *u;
 
        if (!(u = (struct rtnl_mirred *) rtnl_tc_data(TC_CAST(act))))
                return -NLE_NOMEM;
 
        u->m_parm.ifindex = ifindex;
        return 0;
}
 
uint32_t rtnl_mirred_get_ifindex(struct rtnl_act *act)
{
        struct rtnl_mirred *u;
 
        if ((u = (struct rtnl_mirred *) rtnl_tc_data(TC_CAST(act))))
                return u->m_parm.ifindex;
        return 0;
}
 
int rtnl_mirred_set_policy(struct rtnl_act *act, int policy)
{
        struct rtnl_mirred *u;
 
        if (!(u = (struct rtnl_mirred *) rtnl_tc_data(TC_CAST(act))))
                return -NLE_NOMEM;
 
        u->m_parm.action = policy;
 
        return 0;
}
 
int rtnl_mirred_get_policy(struct rtnl_act *act)
{
        struct rtnl_mirred *u;
 
        if (!(u = (struct rtnl_mirred *) rtnl_tc_data(TC_CAST(act))))
                return -NLE_NOMEM;
        return u->m_parm.action;
}
 
/** @} */
 
static struct rtnl_tc_ops mirred_ops = {
        .to_kind                = "mirred",
        .to_type                = RTNL_TC_TYPE_ACT,
        .to_size                = sizeof(struct rtnl_mirred),
        .to_msg_parser          = mirred_msg_parser,
        .to_free_data           = mirred_free_data,
        .to_clone               = NULL,
        .to_msg_fill            = mirred_msg_fill,
        .to_dump = {
            [NL_DUMP_LINE]      = mirred_dump_line,
            [NL_DUMP_DETAILS]   = mirred_dump_details,
            [NL_DUMP_STATS]     = mirred_dump_stats,
        },
};
 
static void __init mirred_init(void)
{
        rtnl_tc_register(&mirred_ops);
}
 
static void __exit mirred_exit(void)
{
        rtnl_tc_unregister(&mirred_ops);
}
 
/** @} */