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|
/*
* PBR - vty code
* Copyright (C) 2018 Cumulus Networks, Inc.
* Donald Sharp
*
* FRR 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, or (at your option) any
* later version.
*
* FRR is distributed in the hope that 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; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "vty.h"
#include "command.h"
#include "prefix.h"
#include "vrf.h"
#include "nexthop.h"
#include "nexthop_group.h"
#include "nexthop_group_private.h"
#include "log.h"
#include "debug.h"
#include "pbr.h"
#include "pbrd/pbr_nht.h"
#include "pbrd/pbr_map.h"
#include "pbrd/pbr_zebra.h"
#include "pbrd/pbr_vty.h"
#include "pbrd/pbr_debug.h"
#ifndef VTYSH_EXTRACT_PL
#include "pbrd/pbr_vty_clippy.c"
#endif
DEFUN_NOSH(pbr_map, pbr_map_cmd, "pbr-map PBRMAP seq (1-700)",
"Create pbr-map or enter pbr-map command mode\n"
"The name of the PBR MAP\n"
"Sequence to insert in existing pbr-map entry\n"
"Sequence number\n")
{
const char *pbrm_name = argv[1]->arg;
uint32_t seqno = atoi(argv[3]->arg);
struct pbr_map_sequence *pbrms;
pbrms = pbrms_get(pbrm_name, seqno);
VTY_PUSH_CONTEXT(PBRMAP_NODE, pbrms);
return CMD_SUCCESS;
}
DEFUN_NOSH(no_pbr_map, no_pbr_map_cmd, "no pbr-map PBRMAP [seq (1-700)]",
NO_STR
"Delete pbr-map\n"
"The name of the PBR MAP\n"
"Sequence to delete from existing pbr-map entry\n"
"Sequence number\n")
{
const char *pbrm_name = argv[2]->arg;
uint32_t seqno = 0;
struct pbr_map *pbrm = pbrm_find(pbrm_name);
struct pbr_map_sequence *pbrms;
struct listnode *node, *next_node;
if (argc > 3)
seqno = atoi(argv[4]->arg);
if (!pbrm) {
vty_out(vty, "pbr-map %s not found\n", pbrm_name);
return CMD_SUCCESS;
}
for (ALL_LIST_ELEMENTS(pbrm->seqnumbers, node, next_node, pbrms)) {
if (seqno && pbrms->seqno != seqno)
continue;
pbr_map_delete(pbrms);
}
return CMD_SUCCESS;
}
DEFPY(pbr_set_table_range,
pbr_set_table_range_cmd,
"[no] pbr table range (10000-4294966272)$lb (10000-4294966272)$ub",
NO_STR
PBR_STR
"Set table ID range\n"
"Set table ID range\n"
"Lower bound for table ID range\n"
"Upper bound for table ID range\n")
{
/* upper bound is 2^32 - 2^10 */
int ret = CMD_WARNING;
const int minrange = 1000;
/* validate given bounds */
if (lb > ub)
vty_out(vty, "%% Lower bound must be less than upper bound\n");
else if (ub - lb < minrange)
vty_out(vty, "%% Range breadth must be at least %d\n", minrange);
else {
ret = CMD_SUCCESS;
pbr_nht_set_tableid_range((uint32_t) lb, (uint32_t) ub);
}
return ret;
}
DEFPY(pbr_map_match_src, pbr_map_match_src_cmd,
"[no] match src-ip <A.B.C.D/M|X:X::X:X/M>$prefix",
NO_STR
"Match the rest of the command\n"
"Choose the src ip or ipv6 prefix to use\n"
"v4 Prefix\n"
"v6 Prefix\n")
{
struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);
pbrms->family = prefix->family;
if (!no) {
if (prefix_same(pbrms->src, prefix))
return CMD_SUCCESS;
if (!pbrms->src)
pbrms->src = prefix_new();
prefix_copy(pbrms->src, prefix);
} else {
prefix_free(pbrms->src);
pbrms->src = 0;
}
pbr_map_check(pbrms);
return CMD_SUCCESS;
}
DEFPY(pbr_map_match_dst, pbr_map_match_dst_cmd,
"[no] match dst-ip <A.B.C.D/M|X:X::X:X/M>$prefix",
NO_STR
"Match the rest of the command\n"
"Choose the src ip or ipv6 prefix to use\n"
"v4 Prefix\n"
"v6 Prefix\n")
{
struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);
pbrms->family = prefix->family;
if (!no) {
if (prefix_same(pbrms->dst, prefix))
return CMD_SUCCESS;
if (!pbrms->dst)
pbrms->dst = prefix_new();
prefix_copy(pbrms->dst, prefix);
} else {
prefix_free(pbrms->dst);
pbrms->dst = NULL;
}
pbr_map_check(pbrms);
return CMD_SUCCESS;
}
DEFPY(pbr_map_match_mark, pbr_map_match_mark_cmd,
"[no] match mark (1-4294967295)$mark",
NO_STR
"Match the rest of the command\n"
"Choose the mark value to use\n"
"mark\n")
{
struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);
#ifndef GNU_LINUX
vty_out(vty, "pbr marks are not supported on this platform");
return CMD_WARNING_CONFIG_FAILED;
#endif
if (!no) {
if (pbrms->mark == (uint32_t) mark)
return CMD_SUCCESS;
pbrms->mark = (uint32_t) mark;
} else {
pbrms->mark = 0;
}
pbr_map_check(pbrms);
return CMD_SUCCESS;
}
DEFPY(pbr_map_nexthop_group, pbr_map_nexthop_group_cmd,
"[no] set nexthop-group NHGNAME$name",
NO_STR
"Set for the PBR-MAP\n"
"nexthop-group to use\n"
"The name of the nexthop-group\n")
{
struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);
struct nexthop_group_cmd *nhgc;
if (pbrms->nhg) {
vty_out(vty,
"A `set nexthop XX` command already exists, please remove that first\n");
return CMD_WARNING_CONFIG_FAILED;
}
nhgc = nhgc_find(name);
if (!nhgc) {
vty_out(vty, "Specified nexthop-group %s does not exist\n",
name);
vty_out(vty, "PBR-MAP will not be applied until it is created\n");
}
if (no) {
if (pbrms->nhgrp_name && strcmp(name, pbrms->nhgrp_name) == 0)
pbr_map_delete_nexthop_group(pbrms);
else {
vty_out(vty,
"Nexthop Group specified: %s does not exist to remove",
name);
return CMD_WARNING_CONFIG_FAILED;
}
} else {
if (pbrms->nhgrp_name) {
if (strcmp(name, pbrms->nhgrp_name) != 0) {
vty_out(vty,
"Please delete current nexthop group before modifying current one");
return CMD_WARNING_CONFIG_FAILED;
}
return CMD_SUCCESS;
}
pbrms->nhgrp_name = XSTRDUP(MTYPE_TMP, name);
pbr_map_check(pbrms);
}
return CMD_SUCCESS;
}
DEFPY(pbr_map_nexthop, pbr_map_nexthop_cmd,
"[no] set nexthop\
<\
<A.B.C.D|X:X::X:X>$addr [INTERFACE$intf]\
|INTERFACE$intf\
>\
[nexthop-vrf NAME$vrf_name]",
NO_STR
"Set for the PBR-MAP\n"
"Specify one of the nexthops in this map\n"
"v4 Address\n"
"v6 Address\n"
"Interface to use\n"
"Interface to use\n"
"If the nexthop is in a different vrf tell us\n"
"The nexthop-vrf Name\n")
{
struct pbr_map_sequence *pbrms = VTY_GET_CONTEXT(pbr_map_sequence);
struct vrf *vrf;
struct nexthop nhop;
struct nexthop *nh;
if (pbrms->nhgrp_name) {
vty_out(vty,
"Please unconfigure the nexthop group before adding an individual nexthop");
return CMD_WARNING_CONFIG_FAILED;
}
if (vrf_name)
vrf = vrf_lookup_by_name(vrf_name);
else
vrf = vrf_lookup_by_id(VRF_DEFAULT);
if (!vrf) {
vty_out(vty, "Specified: %s is non-existent\n", vrf_name);
return CMD_WARNING_CONFIG_FAILED;
}
memset(&nhop, 0, sizeof(nhop));
nhop.vrf_id = vrf->vrf_id;
if (intf) {
nhop.ifindex = ifname2ifindex(intf, vrf->vrf_id);
if (nhop.ifindex == IFINDEX_INTERNAL) {
vty_out(vty,
"Specified Intf %s does not exist in vrf: %s\n",
intf, vrf->name);
return CMD_WARNING_CONFIG_FAILED;
}
}
if (addr) {
if (addr->sa.sa_family == AF_INET) {
nhop.gate.ipv4.s_addr = addr->sin.sin_addr.s_addr;
if (intf)
nhop.type = NEXTHOP_TYPE_IPV4_IFINDEX;
else
nhop.type = NEXTHOP_TYPE_IPV4;
} else {
nhop.gate.ipv6 = addr->sin6.sin6_addr;
if (intf)
nhop.type = NEXTHOP_TYPE_IPV6_IFINDEX;
else {
if (IN6_IS_ADDR_LINKLOCAL(&nhop.gate.ipv6)) {
vty_out(vty,
"Specified a v6 LL with no interface, rejecting\n");
return CMD_WARNING_CONFIG_FAILED;
}
nhop.type = NEXTHOP_TYPE_IPV6;
}
}
} else
nhop.type = NEXTHOP_TYPE_IFINDEX;
if (pbrms->nhg)
nh = nexthop_exists(pbrms->nhg, &nhop);
else {
char buf[PBR_NHC_NAMELEN];
if (no) {
vty_out(vty, "No nexthops to delete\n");
return CMD_WARNING_CONFIG_FAILED;
}
pbrms->nhg = nexthop_group_new();
pbrms->internal_nhg_name =
XSTRDUP(MTYPE_TMP,
pbr_nht_nexthop_make_name(pbrms->parent->name,
PBR_NHC_NAMELEN,
pbrms->seqno,
buf));
nh = NULL;
}
if (no) {
if (nh)
pbr_nht_delete_individual_nexthop(pbrms);
} else if (!nh) {
if (pbrms->nhg->nexthop) {
vty_out(vty,
"If you would like more than one nexthop please use nexthop-groups");
return CMD_WARNING_CONFIG_FAILED;
}
/* must be adding new nexthop since !no and !nexthop_exists */
nh = nexthop_new();
memcpy(nh, &nhop, sizeof(nhop));
_nexthop_add(&pbrms->nhg->nexthop, nh);
pbr_nht_add_individual_nexthop(pbrms);
pbr_map_check(pbrms);
}
if (nhop.type == NEXTHOP_TYPE_IFINDEX) {
struct interface *ifp;
ifp = if_lookup_by_index(nhop.ifindex, nhop.vrf_id);
if (ifp)
pbr_nht_nexthop_interface_update(ifp);
}
return CMD_SUCCESS;
}
DEFPY (pbr_policy,
pbr_policy_cmd,
"[no] pbr-policy PBRMAP$mapname",
NO_STR
"Policy to use\n"
"Name of the pbr-map to apply\n")
{
VTY_DECLVAR_CONTEXT(interface, ifp);
struct pbr_map *pbrm, *old_pbrm;
struct pbr_interface *pbr_ifp = ifp->info;
old_pbrm = NULL;
pbrm = pbrm_find(mapname);
if (!pbr_ifp) {
/* we don't want one and we don't have one, so... */
if (no)
return CMD_SUCCESS;
/* Some one could have fat fingered the interface name */
pbr_ifp = pbr_if_new(ifp);
}
if (no) {
if (strcmp(pbr_ifp->mapname, mapname) == 0) {
pbr_ifp->mapname[0] = '\0';
if (pbrm)
pbr_map_interface_delete(pbrm, ifp);
}
} else {
if (strcmp(pbr_ifp->mapname, "") != 0) {
old_pbrm = pbrm_find(pbr_ifp->mapname);
/*
* So if we have an old pbrm we should only
* delete it if we are actually deleting and
* moving to a new pbrm
*/
if (old_pbrm && old_pbrm != pbrm)
pbr_map_interface_delete(old_pbrm, ifp);
}
snprintf(pbr_ifp->mapname, sizeof(pbr_ifp->mapname),
"%s", mapname);
/*
* So only reinstall if the old_pbrm and this pbrm are
* different.
*/
if (pbrm && pbrm != old_pbrm)
pbr_map_add_interface(pbrm, ifp);
}
return CMD_SUCCESS;
}
DEFPY (show_pbr,
show_pbr_cmd,
"show pbr",
SHOW_STR
PBR_STR)
{
pbr_nht_write_table_range(vty);
pbr_nht_write_rule_range(vty);
return CMD_SUCCESS;
}
DEFPY (show_pbr_map,
show_pbr_map_cmd,
"show pbr map [NAME$name] [detail$detail]",
SHOW_STR
PBR_STR
"PBR Map\n"
"PBR Map Name\n"
"Detailed information\n")
{
struct pbr_map_sequence *pbrms;
struct pbr_map *pbrm;
struct listnode *node;
char buf[PREFIX_STRLEN];
char rbuf[64];
RB_FOREACH (pbrm, pbr_map_entry_head, &pbr_maps) {
if (name && strcmp(name, pbrm->name) != 0)
continue;
vty_out(vty, " pbr-map %s valid: %d\n", pbrm->name,
pbrm->valid);
for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms)) {
if (pbrms->reason)
pbr_map_reason_string(pbrms->reason, rbuf,
sizeof(rbuf));
vty_out(vty,
" Seq: %u rule: %u Installed: %" PRIu64 "(%u) Reason: %s\n",
pbrms->seqno, pbrms->ruleno, pbrms->installed,
pbrms->unique, pbrms->reason ? rbuf : "Valid");
if (pbrms->src)
vty_out(vty, "\tSRC Match: %s\n",
prefix2str(pbrms->src, buf,
sizeof(buf)));
if (pbrms->dst)
vty_out(vty, "\tDST Match: %s\n",
prefix2str(pbrms->dst, buf,
sizeof(buf)));
if (pbrms->mark)
vty_out(vty, "\tMARK Match: %u\n", pbrms->mark);
if (pbrms->nhgrp_name) {
vty_out(vty,
"\tNexthop-Group: %s(%u) Installed: %u(%d)\n",
pbrms->nhgrp_name,
pbr_nht_get_table(pbrms->nhgrp_name),
pbrms->nhs_installed,
pbr_nht_get_installed(
pbrms->nhgrp_name));
} else if (pbrms->nhg) {
vty_out(vty, " ");
nexthop_group_write_nexthop(
vty, pbrms->nhg->nexthop);
vty_out(vty,
"\tInstalled: %u(%d) Tableid: %d\n",
pbrms->nhs_installed,
pbr_nht_get_installed(
pbrms->internal_nhg_name),
pbr_nht_get_table(
pbrms->internal_nhg_name));
} else {
vty_out(vty,
"\tNexthop-Group: Unknown Installed: 0(0)\n");
}
}
}
return CMD_SUCCESS;
}
DEFPY(show_pbr_nexthop_group,
show_pbr_nexthop_group_cmd,
"show pbr nexthop-groups [WORD$word]",
SHOW_STR
PBR_STR
"Nexthop Groups\n"
"Optional Name of the nexthop group\n")
{
pbr_nht_show_nexthop_group(vty, word);
return CMD_SUCCESS;
}
DEFPY (show_pbr_interface,
show_pbr_interface_cmd,
"show pbr interface [NAME$name]",
SHOW_STR
PBR_STR
"PBR Interface\n"
"PBR Interface Name\n")
{
struct interface *ifp;
struct vrf *vrf;
struct pbr_interface *pbr_ifp;
RB_FOREACH(vrf, vrf_name_head, &vrfs_by_name) {
FOR_ALL_INTERFACES(vrf, ifp) {
struct pbr_map *pbrm;
if (!ifp->info)
continue;
if (name && strcmp(ifp->name, name) != 0)
continue;
pbr_ifp = ifp->info;
if (strcmp(pbr_ifp->mapname, "") == 0)
continue;
pbrm = pbrm_find(pbr_ifp->mapname);
vty_out(vty, " %s(%d) with pbr-policy %s", ifp->name,
ifp->ifindex, pbr_ifp->mapname);
if (!pbrm)
vty_out(vty, " (map doesn't exist)");
vty_out(vty, "\n");
}
}
return CMD_SUCCESS;
}
/* PBR debugging CLI ------------------------------------------------------- */
static struct cmd_node debug_node = {DEBUG_NODE, "", 1};
DEFPY(debug_pbr,
debug_pbr_cmd,
"[no] debug pbr [{map$map|zebra$zebra|nht$nht|events$events}]",
NO_STR
DEBUG_STR
PBR_STR
"Policy maps\n"
"PBRD <-> Zebra communications\n"
"Nexthop tracking\n"
"Events\n")
{
uint32_t mode = DEBUG_NODE2MODE(vty->node);
if (map)
DEBUG_MODE_SET(&pbr_dbg_map, mode, !no);
if (zebra)
DEBUG_MODE_SET(&pbr_dbg_zebra, mode, !no);
if (nht)
DEBUG_MODE_SET(&pbr_dbg_nht, mode, !no);
if (events)
DEBUG_MODE_SET(&pbr_dbg_event, mode, !no);
/* no specific debug --> act on all of them */
if (strmatch(argv[argc - 1]->text, "pbr"))
pbr_debug_set_all(mode, !no);
return CMD_SUCCESS;
}
DEFUN_NOSH(show_debugging_pbr,
show_debugging_pbr_cmd,
"show debugging [pbr]",
SHOW_STR
DEBUG_STR
PBR_STR)
{
vty_out(vty, "PBR debugging status:\n");
pbr_debug_config_write_helper(vty, false);
return CMD_SUCCESS;
}
/* ------------------------------------------------------------------------- */
static struct cmd_node interface_node = {
INTERFACE_NODE, "%s(config-if)# ", 1 /* vtysh ? yes */
};
static int pbr_interface_config_write(struct vty *vty)
{
struct interface *ifp;
struct vrf *vrf;
RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
FOR_ALL_INTERFACES (vrf, ifp) {
if (vrf->vrf_id == VRF_DEFAULT)
vty_frame(vty, "interface %s\n", ifp->name);
else
vty_frame(vty, "interface %s vrf %s\n",
ifp->name, vrf->name);
if (ifp->desc)
vty_out(vty, " description %s\n", ifp->desc);
pbr_map_write_interfaces(vty, ifp);
vty_endframe(vty, "!\n");
}
}
return 1;
}
/* PBR map node structure. */
static struct cmd_node pbr_map_node = {PBRMAP_NODE, "%s(config-pbr-map)# ", 1};
static int pbr_vty_map_config_write_sequence(struct vty *vty,
struct pbr_map *pbrm,
struct pbr_map_sequence *pbrms)
{
char buff[PREFIX_STRLEN];
vty_out(vty, "pbr-map %s seq %u\n", pbrm->name, pbrms->seqno);
if (pbrms->src)
vty_out(vty, " match src-ip %s\n",
prefix2str(pbrms->src, buff, sizeof(buff)));
if (pbrms->dst)
vty_out(vty, " match dst-ip %s\n",
prefix2str(pbrms->dst, buff, sizeof(buff)));
if (pbrms->mark)
vty_out(vty, " match mark %u\n", pbrms->mark);
if (pbrms->nhgrp_name)
vty_out(vty, " set nexthop-group %s\n", pbrms->nhgrp_name);
if (pbrms->nhg) {
vty_out(vty, " set ");
nexthop_group_write_nexthop(vty, pbrms->nhg->nexthop);
}
vty_out(vty, "!\n");
return 1;
}
static int pbr_vty_map_config_write(struct vty *vty)
{
struct pbr_map *pbrm;
pbr_nht_write_table_range(vty);
pbr_nht_write_rule_range(vty);
RB_FOREACH(pbrm, pbr_map_entry_head, &pbr_maps) {
struct pbr_map_sequence *pbrms;
struct listnode *node;
for (ALL_LIST_ELEMENTS_RO(pbrm->seqnumbers, node, pbrms))
pbr_vty_map_config_write_sequence(vty, pbrm, pbrms);
}
return 1;
}
static void pbr_map_completer(vector comps, struct cmd_token *token)
{
struct pbr_map *pbrm;
RB_FOREACH (pbrm, pbr_map_entry_head, &pbr_maps)
vector_set(comps, XSTRDUP(MTYPE_COMPLETION, pbrm->name));
}
static const struct cmd_variable_handler pbr_map_name[] = {
{
.tokenname = "PBRMAP", .completions = pbr_map_completer,
},
{
.completions = NULL
}
};
void pbr_vty_init(void)
{
cmd_variable_handler_register(pbr_map_name);
install_node(&interface_node,
pbr_interface_config_write);
if_cmd_init();
install_node(&pbr_map_node,
pbr_vty_map_config_write);
/* debug */
install_node(&debug_node, pbr_debug_config_write);
install_element(VIEW_NODE, &debug_pbr_cmd);
install_element(CONFIG_NODE, &debug_pbr_cmd);
install_element(VIEW_NODE, &show_debugging_pbr_cmd);
install_default(PBRMAP_NODE);
install_element(CONFIG_NODE, &pbr_map_cmd);
install_element(CONFIG_NODE, &no_pbr_map_cmd);
install_element(CONFIG_NODE, &pbr_set_table_range_cmd);
install_element(INTERFACE_NODE, &pbr_policy_cmd);
install_element(PBRMAP_NODE, &pbr_map_match_src_cmd);
install_element(PBRMAP_NODE, &pbr_map_match_dst_cmd);
install_element(PBRMAP_NODE, &pbr_map_match_mark_cmd);
install_element(PBRMAP_NODE, &pbr_map_nexthop_group_cmd);
install_element(PBRMAP_NODE, &pbr_map_nexthop_cmd);
install_element(VIEW_NODE, &show_pbr_cmd);
install_element(VIEW_NODE, &show_pbr_map_cmd);
install_element(VIEW_NODE, &show_pbr_interface_cmd);
install_element(VIEW_NODE, &show_pbr_nexthop_group_cmd);
}
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