zebra/tc_netlink.h

   1 /*
   2  * Zebra Traffic Control (TC) interaction with the kernel using netlink.
   3  *
   4  * Copyright (C) 2022 Shichu Yang
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; either version 2 of the License, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef _ZEBRA_TC_NETLINK_H
  22 #define _ZEBRA_TC_NETLINK_H
  23
  24 #ifdef HAVE_NETLINK
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 /* Represent a prefixed address in flower filter */
  31
  32 struct inet_prefix {
  33         uint16_t flags;
  34         uint16_t bytelen;
  35         uint16_t bitlen;
  36         uint16_t family;
  37         uint32_t data[64];
  38 };
  39
  40 enum {
  41         PREFIXLEN_SPECIFIED = (1 << 0),
  42         ADDRTYPE_INET = (1 << 1),
  43         ADDRTYPE_UNSPEC = (1 << 2),
  44         ADDRTYPE_MULTI = (1 << 3),
  45
  46         ADDRTYPE_INET_UNSPEC = ADDRTYPE_INET | ADDRTYPE_UNSPEC,
  47         ADDRTYPE_INET_MULTI = ADDRTYPE_INET | ADDRTYPE_MULTI
  48 };
  49
  50 extern enum netlink_msg_status
  51 netlink_put_tc_qdisc_update_msg(struct nl_batch *bth,
  52                                 struct zebra_dplane_ctx *ctx);
  53 extern enum netlink_msg_status
  54 netlink_put_tc_class_update_msg(struct nl_batch *bth,
  55                                 struct zebra_dplane_ctx *ctx);
  56 extern enum netlink_msg_status
  57 netlink_put_tc_filter_update_msg(struct nl_batch *bth,
  58                                  struct zebra_dplane_ctx *ctx);
  59
  60 /**
  61  * "filter" & "class" in the following become "tfilter" & "tclass" for
  62  * the sake of consistency with kernel message types (RTM_NEWTFILTER etc.)
  63  */
  64
  65 extern int netlink_qdisc_read(struct zebra_ns *zns);
  66 extern int netlink_tfilter_read_for_interface(struct zebra_ns *zns,
  67                                               ifindex_t ifindex);
  68
  69 extern int netlink_tfilter_change(struct nlmsghdr *h, ns_id_t ns_id,
  70                                   int startup);
  71 extern int netlink_tclass_change(struct nlmsghdr *h, ns_id_t ns_id,
  72                                  int startup);
  73 extern int netlink_qdisc_change(struct nlmsghdr *h, ns_id_t ns_id, int startup);
  74
  75
  76 #ifdef __cplusplus
  77 }
  78 #endif
  79
  80 #endif /* HAVE_NETLINK */
  81
  82 #endif /* _ZEBRA_TC_NETLINK_H */