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frr/babeld/babel_interface.c

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// SPDX-License-Identifier: MIT
/*
Copyright 2011 by Matthieu Boutier and Juliusz Chroboczek
*/
#include <zebra.h>
#include "memory.h"
#include "log.h"
#include "command.h"
#include "prefix.h"
#include "vector.h"
#include "distribute.h"
#include "lib_errors.h"
#include "network.h"
#include "babel_main.h"
#include "util.h"
#include "kernel.h"
#include "babel_interface.h"
#include "message.h"
#include "route.h"
#include "babel_zebra.h"
#include "neighbour.h"
#include "route.h"
#include "xroute.h"
#include "babel_errors.h"
#ifndef VTYSH_EXTRACT_PL
#include "babeld/babel_interface_clippy.c"
#endif
DEFINE_MTYPE_STATIC(BABELD, BABEL_IF, "Babel Interface");
#define IS_ENABLE(ifp) (babel_enable_if_lookup(ifp->name) >= 0)
static int babel_enable_if_lookup (const char *ifname);
static int babel_enable_if_add (const char *ifname);
static int babel_enable_if_delete (const char *ifname);
static int interface_recalculate(struct interface *ifp);
static int interface_reset(struct interface *ifp);
static int babel_if_new_hook (struct interface *ifp);
static int babel_if_delete_hook (struct interface *ifp);
static int interface_config_write (struct vty *vty);
static babel_interface_nfo * babel_interface_allocate (void);
static void babel_interface_free (babel_interface_nfo *bi);
static vector babel_enable_if; /* enable interfaces (by cmd). */
int babel_ifp_up(struct interface *ifp)
{
debugf(BABEL_DEBUG_IF, "receive an 'interface up'");
interface_recalculate(ifp);
return 0;
}
int
babel_ifp_down(struct interface *ifp)
{
debugf(BABEL_DEBUG_IF, "receive an 'interface down'");
if (ifp == NULL) {
return 0;
}
interface_reset(ifp);
return 0;
}
int babel_ifp_create (struct interface *ifp)
{
debugf(BABEL_DEBUG_IF, "receive an 'interface add'");
interface_recalculate(ifp);
return 0;
}
int
babel_ifp_destroy(struct interface *ifp)
{
debugf(BABEL_DEBUG_IF, "receive an 'interface delete'");
if (IS_ENABLE(ifp))
interface_reset(ifp);
return 0;
}
int
babel_interface_address_add (ZAPI_CALLBACK_ARGS)
{
babel_interface_nfo *babel_ifp;
struct connected *ifc;
struct prefix *prefix;
debugf(BABEL_DEBUG_IF, "receive an 'interface address add'");
ifc = zebra_interface_address_read (ZEBRA_INTERFACE_ADDRESS_ADD,
zclient->ibuf, vrf_id);
if (ifc == NULL)
return 0;
prefix = ifc->address;
if (prefix->family == AF_INET) {
flush_interface_routes(ifc->ifp, 0);
babel_ifp = babel_get_if_nfo(ifc->ifp);
if (babel_ifp->ipv4 == NULL) {
babel_ifp->ipv4 = malloc(4);
if (babel_ifp->ipv4 == NULL) {
flog_err(EC_BABEL_MEMORY, "not enough memory");
} else {
memcpy(babel_ifp->ipv4, &prefix->u.prefix4, 4);
}
}
}
send_request(ifc->ifp, NULL, 0);
send_update(ifc->ifp, 0, NULL, 0);
return 0;
}
int
babel_interface_address_delete (ZAPI_CALLBACK_ARGS)
{
babel_interface_nfo *babel_ifp;
struct connected *ifc;
struct prefix *prefix;
debugf(BABEL_DEBUG_IF, "receive an 'interface address delete'");
ifc = zebra_interface_address_read (ZEBRA_INTERFACE_ADDRESS_DELETE,
zclient->ibuf, vrf_id);
if (ifc == NULL)
return 0;
prefix = ifc->address;
if (prefix->family == AF_INET) {
flush_interface_routes(ifc->ifp, 0);
babel_ifp = babel_get_if_nfo(ifc->ifp);
if (babel_ifp->ipv4 != NULL
&& memcmp(babel_ifp->ipv4, &prefix->u.prefix4, IPV4_MAX_BYTELEN)
== 0) {
free(babel_ifp->ipv4);
babel_ifp->ipv4 = NULL;
}
}
send_request(ifc->ifp, NULL, 0);
send_update(ifc->ifp, 0, NULL, 0);
connected_free(&ifc);
return 0;
}
/* Lookup function. */
static int
babel_enable_if_lookup (const char *ifname)
{
unsigned int i;
char *str;
for (i = 0; i < vector_active (babel_enable_if); i++)
if ((str = vector_slot (babel_enable_if, i)) != NULL)
if (strcmp (str, ifname) == 0)
return i;
return -1;
}
/* Add interface to babel_enable_if. */
static int
babel_enable_if_add (const char *ifname)
{
int ret;
struct interface *ifp = NULL;
ret = babel_enable_if_lookup (ifname);
if (ret >= 0)
return -1;
vector_set (babel_enable_if, strdup (ifname));
ifp = if_lookup_by_name(ifname, VRF_DEFAULT);
if (ifp != NULL)
interface_recalculate(ifp);
return 1;
}
/* Delete interface from babel_enable_if. */
static int
babel_enable_if_delete (const char *ifname)
{
int babel_enable_if_index;
char *str;
struct interface *ifp = NULL;
babel_enable_if_index = babel_enable_if_lookup (ifname);
if (babel_enable_if_index < 0)
return -1;
str = vector_slot (babel_enable_if, babel_enable_if_index);
free (str);
vector_unset (babel_enable_if, babel_enable_if_index);
ifp = if_lookup_by_name(ifname, VRF_DEFAULT);
if (ifp != NULL)
interface_reset(ifp);
return 1;
}
/* [Babel Command] Babel enable on specified interface or matched network. */
DEFUN (babel_network,
babel_network_cmd,
"network IF_OR_ADDR",
"Enable Babel protocol on specified interface or network.\n"
"Interface or address\n")
{
int ret;
struct prefix p;
ret = str2prefix (argv[1]->arg, &p);
/* Given string is: */
if (ret) /* an IPv4 or v6 network */
return CMD_ERR_NO_MATCH; /* not implemented yet */
else /* an interface name */
ret = babel_enable_if_add (argv[1]->arg);
if (ret < 0) {
vty_out (vty, "There is same network configuration %s\n",
argv[1]->arg);
return CMD_WARNING;
}
return CMD_SUCCESS;
}
/* [Babel Command] Babel enable on specified interface or matched network. */
DEFUN (no_babel_network,
no_babel_network_cmd,
"no network IF_OR_ADDR",
NO_STR
"Disable Babel protocol on specified interface or network.\n"
"Interface or address\n")
{
int ret;
struct prefix p;
ret = str2prefix (argv[2]->arg, &p);
/* Given string is: */
if (ret) /* an IPv4 or v6 network */
return CMD_ERR_NO_MATCH; /* not implemented yet */
else /* an interface name */
ret = babel_enable_if_delete (argv[2]->arg);
if (ret < 0) {
vty_out (vty, "can't find network %s\n",argv[2]->arg);
return CMD_WARNING_CONFIG_FAILED;
}
return CMD_SUCCESS;
}
/* There are a number of interface parameters that must be changed when
an interface becomes wired/wireless. In Quagga, they cannot be
configured separately. */
static void
babel_set_wired_internal(babel_interface_nfo *babel_ifp, int wired)
{
if(wired) {
SET_FLAG(babel_ifp->flags, BABEL_IF_WIRED);
SET_FLAG(babel_ifp->flags, BABEL_IF_SPLIT_HORIZON);
babel_ifp->cost = BABEL_DEFAULT_RXCOST_WIRED;
babel_ifp->channel = BABEL_IF_CHANNEL_NONINTERFERING;
UNSET_FLAG(babel_ifp->flags, BABEL_IF_LQ);
}
else {
UNSET_FLAG(babel_ifp->flags, BABEL_IF_WIRED);
UNSET_FLAG(babel_ifp->flags, BABEL_IF_SPLIT_HORIZON);
babel_ifp->cost = BABEL_DEFAULT_RXCOST_WIRELESS;
babel_ifp->channel = BABEL_IF_CHANNEL_INTERFERING;
SET_FLAG(babel_ifp->flags, BABEL_IF_LQ);
}
}
/* [Interface Command] Tell the interface is wire. */
DEFPY (babel_set_wired,
babel_set_wired_cmd,
"[no] babel wired",
NO_STR
"Babel interface commands\n"
"Enable wired optimizations\n")
{
VTY_DECLVAR_CONTEXT(interface, ifp);
babel_interface_nfo *babel_ifp;
babel_ifp = babel_get_if_nfo(ifp);
assert (babel_ifp != NULL);
babel_set_wired_internal(babel_ifp, no ? 0 : 1);
return CMD_SUCCESS;
}
/* [Interface Command] Tell the interface is wireless (default). */
DEFPY (babel_set_wireless,
babel_set_wireless_cmd,
"[no] babel wireless",
NO_STR
"Babel interface commands\n"
"Disable wired optimizations (assume wireless)\n")
{
VTY_DECLVAR_CONTEXT(interface, ifp);
babel_interface_nfo *babel_ifp;
babel_ifp = babel_get_if_nfo(ifp);
assert (babel_ifp != NULL);
babel_set_wired_internal(babel_ifp, no ? 1 : 0);
return CMD_SUCCESS;
}
/* [Interface Command] Enable split horizon. */
DEFPY (babel_split_horizon,
babel_split_horizon_cmd,
"[no] babel split-horizon",
NO_STR
"Babel interface commands\n"
"Enable split horizon processing\n")
{
VTY_DECLVAR_CONTEXT(interface, ifp);
babel_interface_nfo *babel_ifp;
babel_ifp = babel_get_if_nfo(ifp);
assert (babel_ifp != NULL);
if (!no)
SET_FLAG(babel_ifp->flags, BABEL_IF_SPLIT_HORIZON);
else
UNSET_FLAG(babel_ifp->flags, BABEL_IF_SPLIT_HORIZON);
return CMD_SUCCESS;
}
/* [Interface Command]. */
DEFPY (babel_set_hello_interval,
babel_set_hello_interval_cmd,
"[no] babel hello-interval (20-655340)",
NO_STR
"Babel interface commands\n"
"Time between scheduled hellos\n"
"Milliseconds\n")
{
VTY_DECLVAR_CONTEXT(interface, ifp);
babel_interface_nfo *babel_ifp;
babel_ifp = babel_get_if_nfo(ifp);
assert (babel_ifp != NULL);
babel_ifp->hello_interval = no ?
BABEL_DEFAULT_HELLO_INTERVAL : hello_interval;
return CMD_SUCCESS;
}
/* [Interface Command]. */
DEFPY (babel_set_update_interval,
babel_set_update_interval_cmd,
"[no] babel update-interval (20-655340)",
NO_STR
"Babel interface commands\n"
"Time between scheduled updates\n"
"Milliseconds\n")
{
VTY_DECLVAR_CONTEXT(interface, ifp);
babel_interface_nfo *babel_ifp;
babel_ifp = babel_get_if_nfo(ifp);
assert (babel_ifp != NULL);
babel_ifp->update_interval = no ?
BABEL_DEFAULT_UPDATE_INTERVAL : update_interval;
return CMD_SUCCESS;
}
DEFPY (babel_set_rxcost,
babel_set_rxcost_cmd,
"[no] babel rxcost (1-65534)",
NO_STR
"Babel interface commands\n"
"Rxcost multiplier\n"
"Units\n")
{
VTY_DECLVAR_CONTEXT(interface, ifp);
babel_interface_nfo *babel_ifp;
babel_ifp = babel_get_if_nfo(ifp);
assert (babel_ifp != NULL);
if (no)
rxcost = CHECK_FLAG(babel_ifp->flags, BABEL_IF_WIRED) ?
BABEL_DEFAULT_RXCOST_WIRED : BABEL_DEFAULT_RXCOST_WIRELESS;
babel_ifp->cost = rxcost;
return CMD_SUCCESS;
}
DEFPY (babel_set_rtt_decay,
babel_set_rtt_decay_cmd,
"[no] babel rtt-decay (1-256)",
NO_STR
"Babel interface commands\n"
"Decay factor for exponential moving average of RTT samples\n"
"Units of 1/256\n")
{
VTY_DECLVAR_CONTEXT(interface, ifp);
babel_interface_nfo *babel_ifp;
babel_ifp = babel_get_if_nfo(ifp);
assert (babel_ifp != NULL);
babel_ifp->rtt_decay = no ? BABEL_DEFAULT_RTT_DECAY : rtt_decay;
return CMD_SUCCESS;
}
DEFPY (babel_set_rtt_min,
babel_set_rtt_min_cmd,
"[no] babel rtt-min (1-65535)",
NO_STR
"Babel interface commands\n"
"Minimum RTT starting for increasing cost\n"
"Milliseconds\n")
{
VTY_DECLVAR_CONTEXT(interface, ifp);
babel_interface_nfo *babel_ifp;
babel_ifp = babel_get_if_nfo(ifp);
assert (babel_ifp != NULL);
/* The value is entered in milliseconds but stored as microseconds. */
babel_ifp->rtt_min = no ? BABEL_DEFAULT_RTT_MIN : rtt_min * 1000;
return CMD_SUCCESS;
}
DEFPY (babel_set_rtt_max,
babel_set_rtt_max_cmd,
"[no] babel rtt-max (1-65535)",
NO_STR
"Babel interface commands\n"
"Maximum RTT\n"
"Milliseconds\n")
{
VTY_DECLVAR_CONTEXT(interface, ifp);
babel_interface_nfo *babel_ifp;
babel_ifp = babel_get_if_nfo(ifp);
assert (babel_ifp != NULL);
/* The value is entered in milliseconds but stored as microseconds. */
babel_ifp->rtt_max = no ? BABEL_DEFAULT_RTT_MAX : rtt_max * 1000;
return CMD_SUCCESS;
}
DEFPY (babel_set_max_rtt_penalty,
babel_set_max_rtt_penalty_cmd,
"[no] babel max-rtt-penalty (0-65535)",
NO_STR
"Babel interface commands\n"
"Maximum additional cost due to RTT\n"
"Milliseconds\n")
{
VTY_DECLVAR_CONTEXT(interface, ifp);
babel_interface_nfo *babel_ifp;
babel_ifp = babel_get_if_nfo(ifp);
assert (babel_ifp != NULL);
babel_ifp->max_rtt_penalty = no ?
BABEL_DEFAULT_MAX_RTT_PENALTY : max_rtt_penalty;
return CMD_SUCCESS;
}
DEFPY (babel_set_enable_timestamps,
babel_set_enable_timestamps_cmd,
"[no] babel enable-timestamps",
NO_STR
"Babel interface commands\n"
"Enable timestamps\n")
{
VTY_DECLVAR_CONTEXT(interface, ifp);
babel_interface_nfo *babel_ifp;
babel_ifp = babel_get_if_nfo(ifp);
assert (babel_ifp != NULL);
if (!no)
SET_FLAG(babel_ifp->flags, BABEL_IF_TIMESTAMPS);
else
UNSET_FLAG(babel_ifp->flags, BABEL_IF_TIMESTAMPS);
return CMD_SUCCESS;
}
DEFPY (babel_set_channel,
babel_set_channel_cmd,
"[no] babel channel <(1-254)$ch|interfering$interfering|"
"noninterfering$noninterfering>",
NO_STR
"Babel interface commands\n"
"Channel number for diversity routing\n"
"Number\n"
"Mark channel as interfering\n"
"Mark channel as noninterfering\n"
)
{
VTY_DECLVAR_CONTEXT(interface, ifp);
babel_interface_nfo *babel_ifp;
babel_ifp = babel_get_if_nfo(ifp);
assert (babel_ifp != NULL);
if (no)
ch = CHECK_FLAG(babel_ifp->flags, BABEL_IF_WIRED) ?
BABEL_IF_CHANNEL_NONINTERFERING : BABEL_IF_CHANNEL_INTERFERING;
else if (interfering)
ch = BABEL_IF_CHANNEL_INTERFERING;
else if (noninterfering)
ch = BABEL_IF_CHANNEL_NONINTERFERING;
babel_ifp->channel = ch;
return CMD_SUCCESS;
}
/* This should be no more than half the hello interval, so that hellos
aren't sent late. The result is in milliseconds. */
unsigned
jitter(babel_interface_nfo *babel_ifp, int urgent)
{
unsigned interval = babel_ifp->hello_interval;
if(urgent)
interval = MIN(interval, 100);
else
interval = MIN(interval, 4000);
return roughly(interval) / 4;
}
unsigned
update_jitter(babel_interface_nfo *babel_ifp, int urgent)
{
unsigned interval = babel_ifp->hello_interval;
if(urgent)
interval = MIN(interval, 100);
else
interval = MIN(interval, 4000);
return roughly(interval);
}
/* calculate babeld's specific datas of an interface (change when the interface
change) */
static int
interface_recalculate(struct interface *ifp)
{
babel_interface_nfo *babel_ifp = babel_get_if_nfo(ifp);
unsigned char *tmp = NULL;
int mtu, rc;
struct ipv6_mreq mreq;
if (!IS_ENABLE(ifp))
return -1;
if (!if_is_operative(ifp) || !CHECK_FLAG(ifp->flags, IFF_RUNNING)) {
interface_reset(ifp);
return -1;
}
SET_FLAG(babel_ifp->flags, BABEL_IF_IS_UP);
mtu = MIN(ifp->mtu, ifp->mtu6);
/* We need to be able to fit at least two messages into a packet,
so MTUs below 116 require lower layer fragmentation. */
/* In IPv6, the minimum MTU is 1280, and every host must be able
to reassemble up to 1500 bytes, but I'd rather not rely on this. */
if(mtu < 128) {
debugf(BABEL_DEBUG_IF, "Suspiciously low MTU %d on interface %s (%d).",
mtu, ifp->name, ifp->ifindex);
mtu = 128;
}
/* 4 for Babel header; 40 for IPv6 header, 8 for UDP header, 12 for good luck. */
babel_ifp->bufsize = mtu - 4 - 60;
tmp = babel_ifp->sendbuf;
babel_ifp->sendbuf = realloc(babel_ifp->sendbuf, babel_ifp->bufsize);
if(babel_ifp->sendbuf == NULL) {
flog_err(EC_BABEL_MEMORY, "Couldn't reallocate sendbuf.");
free(tmp);
babel_ifp->bufsize = 0;
return -1;
}
tmp = NULL;
rc = resize_receive_buffer(mtu);
if(rc < 0)
zlog_warn("couldn't resize receive buffer for interface %s (%d) (%d bytes).",
ifp->name, ifp->ifindex, mtu);
memset(&mreq, 0, sizeof(mreq));
memcpy(&mreq.ipv6mr_multiaddr, protocol_group, 16);
mreq.ipv6mr_interface = ifp->ifindex;
rc = setsockopt(protocol_socket, IPPROTO_IPV6, IPV6_JOIN_GROUP,
(char*)&mreq, sizeof(mreq));
if (rc < 0 && errno != EADDRINUSE) {
flog_err_sys(EC_LIB_SOCKET,
"setsockopt(IPV6_JOIN_GROUP) on interface '%s': %s",
ifp->name, safe_strerror(errno));
/* This is probably due to a missing link-local address,
so down this interface, and wait until the main loop
tries to up it again. */
interface_reset(ifp);
return -1;
}
set_timeout(&babel_ifp->hello_timeout, babel_ifp->hello_interval);
set_timeout(&babel_ifp->update_timeout, babel_ifp->update_interval);
send_hello(ifp);
send_request(ifp, NULL, 0);
update_interface_metric(ifp);
debugf(BABEL_DEBUG_COMMON,
"Upped interface %s (%s, cost=%d, channel=%d%s).",
ifp->name,
CHECK_FLAG(babel_ifp->flags, BABEL_IF_WIRED) ? "wired" : "wireless",
babel_ifp->cost,
babel_ifp->channel,
babel_ifp->ipv4 ? ", IPv4" : "");
if(rc > 0)
send_update(ifp, 0, NULL, 0);
return 1;
}
/* Reset the interface as it was new: it's not removed from the interface list,
and may be considered as a upped interface. */
static int
interface_reset(struct interface *ifp)
{
int rc;
struct ipv6_mreq mreq;
babel_interface_nfo *babel_ifp = babel_get_if_nfo(ifp);
if (!CHECK_FLAG(babel_ifp->flags, BABEL_IF_IS_UP))
return 0;
debugf(BABEL_DEBUG_IF, "interface reset: %s", ifp->name);
UNSET_FLAG(babel_ifp->flags, BABEL_IF_IS_UP);
flush_interface_routes(ifp, 0);
babel_ifp->buffered = 0;
babel_ifp->bufsize = 0;
free(babel_ifp->sendbuf);
babel_ifp->num_buffered_updates = 0;
babel_ifp->update_bufsize = 0;
if(babel_ifp->buffered_updates)
free(babel_ifp->buffered_updates);
babel_ifp->buffered_updates = NULL;
babel_ifp->sendbuf = NULL;
if(ifp->ifindex > 0) {
memset(&mreq, 0, sizeof(mreq));
memcpy(&mreq.ipv6mr_multiaddr, protocol_group, 16);
mreq.ipv6mr_interface = ifp->ifindex;
rc = setsockopt(protocol_socket, IPPROTO_IPV6, IPV6_LEAVE_GROUP,
(char*)&mreq, sizeof(mreq));
if(rc < 0)
flog_err_sys(EC_LIB_SOCKET,
"setsockopt(IPV6_LEAVE_GROUP) on interface '%s': %s",
ifp->name, safe_strerror(errno));
}
update_interface_metric(ifp);
debugf(BABEL_DEBUG_COMMON,"Upped network %s (%s, cost=%d%s).",
ifp->name,
CHECK_FLAG(babel_ifp->flags, BABEL_IF_WIRED) ? "wired" : "wireless",
babel_ifp->cost,
babel_ifp->ipv4 ? ", IPv4" : "");
return 1;
}
/* Send retraction to all, and reset all interfaces statistics. */
void
babel_interface_close_all(void)
{
struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT);
struct interface *ifp = NULL;
FOR_ALL_INTERFACES(vrf, ifp) {
if(!if_up(ifp))
continue;
send_wildcard_retraction(ifp);
/* Make sure that we expire quickly from our neighbours'
association caches. */
send_hello_noupdate(ifp, 10);
flushbuf(ifp);
usleep(roughly(1000));
gettime(&babel_now);
}
FOR_ALL_INTERFACES(vrf, ifp) {
if(!if_up(ifp))
continue;
/* Make sure they got it. */
send_wildcard_retraction(ifp);
send_hello_noupdate(ifp, 1);
flushbuf(ifp);
usleep(roughly(10000));
gettime(&babel_now);
interface_reset(ifp);
}
}
/* return "true" if address is one of our ipv6 addresses */
int
is_interface_ll_address(struct interface *ifp, const unsigned char *address)
{
struct connected *connected;
struct listnode *node;
if(!if_up(ifp))
return 0;
FOR_ALL_INTERFACES_ADDRESSES(ifp, connected, node) {
if (connected->address->family == AF_INET6
&& memcmp(&connected->address->u.prefix6, address,
IPV6_MAX_BYTELEN)
== 0)
return 1;
}
return 0;
}
static void
show_babel_interface_sub (struct vty *vty, struct interface *ifp)
{
int is_up;
babel_interface_nfo *babel_ifp;
vty_out (vty, "%s is %s\n", ifp->name,
((is_up = if_is_operative(ifp)) ? "up" : "down"));
vty_out (vty, " ifindex %u, MTU %u bytes %s\n",
ifp->ifindex, MIN(ifp->mtu, ifp->mtu6), if_flag_dump(ifp->flags));
if (!IS_ENABLE(ifp))
{
vty_out (vty, " Babel protocol is not enabled on this interface\n");
return;
}
if (!is_up)
{
vty_out (vty,
" Babel protocol is enabled, but not running on this interface\n");
return;
}
babel_ifp = babel_get_if_nfo (ifp);
vty_out (vty, " Babel protocol is running on this interface\n");
vty_out (vty, " Operating mode is \"%s\"\n",
CHECK_FLAG(babel_ifp->flags, BABEL_IF_WIRED) ? "wired" : "wireless");
vty_out (vty, " Split horizon mode is %s\n",
CHECK_FLAG(babel_ifp->flags, BABEL_IF_SPLIT_HORIZON) ? "On" : "Off");
vty_out (vty, " Hello interval is %u ms\n", babel_ifp->hello_interval);
vty_out (vty, " Update interval is %u ms\n", babel_ifp->update_interval);
vty_out (vty, " Rxcost multiplier is %u\n", babel_ifp->cost);
}
DEFUN (show_babel_interface,
show_babel_interface_cmd,
"show babel interface [IFNAME]",
SHOW_STR
"Babel information\n"
"Interface information\n"
"Interface\n")
{
struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT);
struct interface *ifp;
if (argc == 3)
{
FOR_ALL_INTERFACES (vrf, ifp)
show_babel_interface_sub (vty, ifp);
return CMD_SUCCESS;
}
if ((ifp = if_lookup_by_name (argv[3]->arg, VRF_DEFAULT)) == NULL)
{
vty_out (vty, "No such interface name\n");
return CMD_WARNING;
}
show_babel_interface_sub (vty, ifp);
return CMD_SUCCESS;
}
static void
show_babel_neighbour_sub (struct vty *vty, struct neighbour *neigh)
{
vty_out (vty,
"Neighbour %s dev %s reach %04x rxcost %d txcost %d rtt %s rttcost %d%s.\n",
format_address(neigh->address),
neigh->ifp->name,
neigh->reach,
neighbour_rxcost(neigh),
neigh->txcost,
format_thousands(neigh->rtt),
neighbour_rttcost(neigh),
if_up(neigh->ifp) ? "" : " (down)");
}
DEFUN (show_babel_neighbour,
show_babel_neighbour_cmd,
"show babel neighbor [IFNAME]",
SHOW_STR
"Babel information\n"
"Print neighbors\n"
"Interface\n")
{
struct neighbour *neigh;
struct interface *ifp;
if (argc == 3) {
FOR_ALL_NEIGHBOURS(neigh) {
show_babel_neighbour_sub(vty, neigh);
}
return CMD_SUCCESS;
}
if ((ifp = if_lookup_by_name (argv[3]->arg, VRF_DEFAULT)) == NULL)
{
vty_out (vty, "No such interface name\n");
return CMD_WARNING;
}
FOR_ALL_NEIGHBOURS(neigh) {
if(ifp->ifindex == neigh->ifp->ifindex) {
show_babel_neighbour_sub(vty, neigh);
}
}
return CMD_SUCCESS;
}
static int
babel_prefix_eq(struct prefix *prefix, unsigned char *p, int plen)
{
if(prefix->family == AF_INET6) {
if (prefix->prefixlen != plen
|| memcmp(&prefix->u.prefix6, p, IPV6_MAX_BYTELEN) != 0)
return 0;
} else if(prefix->family == AF_INET) {
if (plen < 96 || !v4mapped(p) || prefix->prefixlen != plen - 96
|| memcmp(&prefix->u.prefix4, p + 12, IPV4_MAX_BYTELEN) != 0)
return 0;
} else {
return 0;
}
return 1;
}
static void
show_babel_routes_sub(struct babel_route *route, struct vty *vty,
struct prefix *prefix)
{
const unsigned char *nexthop =
memcmp(route->nexthop, route->neigh->address, IPV6_MAX_BYTELEN)
== 0
? NULL
: route->nexthop;
char channels[100];
if (prefix
&& !babel_prefix_eq(prefix, route->src->prefix, route->src->plen))
return;
if (route->channels[0] == 0)
channels[0] = '\0';
else {
int k, j = 0;
snprintf(channels, sizeof(channels), " chan (");
j = strlen(channels);
for (k = 0; k < DIVERSITY_HOPS; k++) {
if (route->channels[k] == 0)
break;
if (k > 0)
channels[j++] = ',';
snprintf(channels + j, 100 - j, "%u",
route->channels[k]);
j = strlen(channels);
}
snprintf(channels + j, 100 - j, ")");
if (k == 0)
channels[0] = '\0';
}
vty_out (vty,
"%s metric %d refmetric %d id %s seqno %d%s age %d via %s neigh %s%s%s%s\n",
format_prefix(route->src->prefix, route->src->plen),
route_metric(route), route->refmetric,
format_eui64(route->src->id),
(int)route->seqno,
channels,
(int)(babel_now.tv_sec - route->time),
route->neigh->ifp->name,
format_address(route->neigh->address),
nexthop ? " nexthop " : "",
nexthop ? format_address(nexthop) : "",
route->installed ? " (installed)" : route_feasible(route) ? " (feasible)" : "");
}
static void
show_babel_xroutes_sub (struct xroute *xroute, struct vty *vty,
struct prefix *prefix)
{
if(prefix && !babel_prefix_eq(prefix, xroute->prefix, xroute->plen))
return;
vty_out (vty, "%s metric %d (exported)\n",
format_prefix(xroute->prefix, xroute->plen),
xroute->metric);
}
DEFUN (show_babel_route,
show_babel_route_cmd,
"show babel route",
SHOW_STR
"Babel information\n"
"Babel internal routing table\n")
{
struct route_stream *routes = NULL;
struct xroute_stream *xroutes = NULL;
routes = route_stream(0);
if(routes) {
while(1) {
struct babel_route *route = route_stream_next(routes);
if(route == NULL)
break;
show_babel_routes_sub(route, vty, NULL);
}
route_stream_done(routes);
} else {
flog_err(EC_BABEL_MEMORY, "Couldn't allocate route stream.");
}
xroutes = xroute_stream();
if(xroutes) {
while(1) {
struct xroute *xroute = xroute_stream_next(xroutes);
if(xroute == NULL)
break;
show_babel_xroutes_sub(xroute, vty, NULL);
}
xroute_stream_done(xroutes);
} else {
flog_err(EC_BABEL_MEMORY, "Couldn't allocate route stream.");
}
return CMD_SUCCESS;
}
DEFUN (show_babel_route_prefix,
show_babel_route_prefix_cmd,
"show babel route <A.B.C.D/M|X:X::X:X/M>",
SHOW_STR
"Babel information\n"
"Babel internal routing table\n"
"IPv4 prefix <network>/<length>\n"
"IPv6 prefix <network>/<length>\n")
{
struct route_stream *routes = NULL;
struct xroute_stream *xroutes = NULL;
struct prefix prefix;
int ret;
ret = str2prefix(argv[3]->arg, &prefix);
if(ret == 0) {
vty_out (vty, "%% Malformed address\n");
return CMD_WARNING;
}
routes = route_stream(0);
if(routes) {
while(1) {
struct babel_route *route = route_stream_next(routes);
if(route == NULL)
break;
show_babel_routes_sub(route, vty, &prefix);
}
route_stream_done(routes);
} else {
flog_err(EC_BABEL_MEMORY, "Couldn't allocate route stream.");
}
xroutes = xroute_stream();
if(xroutes) {
while(1) {
struct xroute *xroute = xroute_stream_next(xroutes);
if(xroute == NULL)
break;
show_babel_xroutes_sub(xroute, vty, &prefix);
}
xroute_stream_done(xroutes);
} else {
flog_err(EC_BABEL_MEMORY, "Couldn't allocate route stream.");
}
return CMD_SUCCESS;
}
DEFUN (show_babel_route_addr,
show_babel_route_addr_cmd,
"show babel route A.B.C.D",
SHOW_STR
"Babel information\n"
"Babel internal routing table\n"
"IPv4 address <network>/<length>\n")
{
struct in_addr addr;
char buf[INET_ADDRSTRLEN + 8];
char buf1[INET_ADDRSTRLEN + 8];
struct route_stream *routes = NULL;
struct xroute_stream *xroutes = NULL;
struct prefix prefix;
int ret;
ret = inet_aton (argv[3]->arg, &addr);
if (ret <= 0) {
vty_out (vty, "%% Malformed address\n");
return CMD_WARNING;
}
/* Quagga has no convenient prefix constructors. */
snprintf(buf, sizeof(buf), "%s/%d",
inet_ntop(AF_INET, &addr, buf1, sizeof(buf1)), 32);
ret = str2prefix(buf, &prefix);
if (ret == 0) {
vty_out (vty, "%% Parse error -- this shouldn't happen\n");
return CMD_WARNING;
}
routes = route_stream(0);
if(routes) {
while(1) {
struct babel_route *route = route_stream_next(routes);
if(route == NULL)
break;
show_babel_routes_sub(route, vty, &prefix);
}
route_stream_done(routes);
} else {
flog_err(EC_BABEL_MEMORY, "Couldn't allocate route stream.");
}
xroutes = xroute_stream();
if(xroutes) {
while(1) {
struct xroute *xroute = xroute_stream_next(xroutes);
if(xroute == NULL)
break;
show_babel_xroutes_sub(xroute, vty, &prefix);
}
xroute_stream_done(xroutes);
} else {
flog_err(EC_BABEL_MEMORY, "Couldn't allocate route stream.");
}
return CMD_SUCCESS;
}
DEFUN (show_babel_route_addr6,
show_babel_route_addr6_cmd,
"show babel route X:X::X:X",
SHOW_STR
"Babel information\n"
"Babel internal routing table\n"
"IPv6 address <network>/<length>\n")
{
struct in6_addr addr;
char buf1[INET6_ADDRSTRLEN];
char buf[INET6_ADDRSTRLEN + 8];
struct route_stream *routes = NULL;
struct xroute_stream *xroutes = NULL;
struct prefix prefix;
int ret;
ret = inet_pton (AF_INET6, argv[3]->arg, &addr);
if (ret <= 0) {
vty_out (vty, "%% Malformed address\n");
return CMD_WARNING;
}
/* Quagga has no convenient prefix constructors. */
snprintf(buf, sizeof(buf), "%s/%d",
inet_ntop(AF_INET6, &addr, buf1, sizeof(buf1)), 128);
ret = str2prefix(buf, &prefix);
if (ret == 0) {
vty_out (vty, "%% Parse error -- this shouldn't happen\n");
return CMD_WARNING;
}
routes = route_stream(0);
if(routes) {
while(1) {
struct babel_route *route = route_stream_next(routes);
if(route == NULL)
break;
show_babel_routes_sub(route, vty, &prefix);
}
route_stream_done(routes);
} else {
flog_err(EC_BABEL_MEMORY, "Couldn't allocate route stream.");
}
xroutes = xroute_stream();
if(xroutes) {
while(1) {
struct xroute *xroute = xroute_stream_next(xroutes);
if(xroute == NULL)
break;
show_babel_xroutes_sub(xroute, vty, &prefix);
}
xroute_stream_done(xroutes);
} else {
flog_err(EC_BABEL_MEMORY, "Couldn't allocate route stream.");
}
return CMD_SUCCESS;
}
DEFUN (show_babel_parameters,
show_babel_parameters_cmd,
"show babel parameters",
SHOW_STR
"Babel information\n"
"Configuration information\n")
{
struct babel *babel_ctx;
vty_out (vty, " -- Babel running configuration --\n");
show_babel_main_configuration(vty);
babel_ctx = babel_lookup();
if (babel_ctx) {
vty_out (vty, " -- distribution lists --\n");
config_show_distribute(vty, babel_ctx->distribute_ctx);
}
return CMD_SUCCESS;
}
void
babel_if_init(void)
{
/* initialize interface list */
hook_register_prio(if_add, 0, babel_if_new_hook);
hook_register_prio(if_del, 0, babel_if_delete_hook);
babel_enable_if = vector_init (1);
/* install interface node and commands */
if_cmd_init(interface_config_write);
install_element(BABEL_NODE, &babel_network_cmd);
install_element(BABEL_NODE, &no_babel_network_cmd);
install_element(INTERFACE_NODE, &babel_split_horizon_cmd);
install_element(INTERFACE_NODE, &babel_set_wired_cmd);
install_element(INTERFACE_NODE, &babel_set_wireless_cmd);
install_element(INTERFACE_NODE, &babel_set_hello_interval_cmd);
install_element(INTERFACE_NODE, &babel_set_update_interval_cmd);
install_element(INTERFACE_NODE, &babel_set_rxcost_cmd);
install_element(INTERFACE_NODE, &babel_set_channel_cmd);
install_element(INTERFACE_NODE, &babel_set_rtt_decay_cmd);
install_element(INTERFACE_NODE, &babel_set_rtt_min_cmd);
install_element(INTERFACE_NODE, &babel_set_rtt_max_cmd);
install_element(INTERFACE_NODE, &babel_set_max_rtt_penalty_cmd);
install_element(INTERFACE_NODE, &babel_set_enable_timestamps_cmd);
/* "show babel ..." commands */
install_element(VIEW_NODE, &show_babel_interface_cmd);
install_element(VIEW_NODE, &show_babel_neighbour_cmd);
install_element(VIEW_NODE, &show_babel_route_cmd);
install_element(VIEW_NODE, &show_babel_route_prefix_cmd);
install_element(VIEW_NODE, &show_babel_route_addr_cmd);
install_element(VIEW_NODE, &show_babel_route_addr6_cmd);
install_element(VIEW_NODE, &show_babel_parameters_cmd);
}
/* hooks: functions called respectively when struct interface is
created or deleted. */
static int
babel_if_new_hook (struct interface *ifp)
{
ifp->info = babel_interface_allocate();
return 0;
}
static int
babel_if_delete_hook (struct interface *ifp)
{
babel_interface_free(ifp->info);
ifp->info = NULL;
return 0;
}
/* Output an "interface" section for each of the known interfaces with
babeld-specific statement lines where appropriate. */
static int
interface_config_write (struct vty *vty)
{
struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT);
struct interface *ifp;
int write = 0;
FOR_ALL_INTERFACES (vrf, ifp) {
if_vty_config_start(vty, ifp);
if (ifp->desc)
vty_out (vty, " description %s\n",ifp->desc);
babel_interface_nfo *babel_ifp = babel_get_if_nfo (ifp);
/* wireless is the default*/
if (CHECK_FLAG (babel_ifp->flags, BABEL_IF_WIRED))
{
vty_out (vty, " babel wired\n");
write++;
}
if (babel_ifp->hello_interval != BABEL_DEFAULT_HELLO_INTERVAL)
{
vty_out (vty, " babel hello-interval %u\n",
babel_ifp->hello_interval);
write++;
}
if (babel_ifp->update_interval != BABEL_DEFAULT_UPDATE_INTERVAL)
{
vty_out (vty, " babel update-interval %u\n",
babel_ifp->update_interval);
write++;
}
if (CHECK_FLAG(babel_ifp->flags, BABEL_IF_TIMESTAMPS)) {
vty_out(vty, " babel enable-timestamps\n");
write++;
}
if (babel_ifp->max_rtt_penalty != BABEL_DEFAULT_MAX_RTT_PENALTY) {
vty_out(vty, " babel max-rtt-penalty %u\n",
babel_ifp->max_rtt_penalty);
write++;
}
if (babel_ifp->rtt_decay != BABEL_DEFAULT_RTT_DECAY) {
vty_out(vty, " babel rtt-decay %u\n", babel_ifp->rtt_decay);
write++;
}
if (babel_ifp->rtt_min != BABEL_DEFAULT_RTT_MIN) {
vty_out(vty, " babel rtt-min %u\n", babel_ifp->rtt_min / 1000);
write++;
}
if (babel_ifp->rtt_max != BABEL_DEFAULT_RTT_MAX) {
vty_out(vty, " babel rtt-max %u\n", babel_ifp->rtt_max / 1000);
write++;
}
/* Some parameters have different defaults for wired/wireless. */
if (CHECK_FLAG (babel_ifp->flags, BABEL_IF_WIRED)) {
if (!CHECK_FLAG (babel_ifp->flags, BABEL_IF_SPLIT_HORIZON)) {
vty_out (vty, " no babel split-horizon\n");
write++;
}
if (babel_ifp->cost != BABEL_DEFAULT_RXCOST_WIRED) {
vty_out (vty, " babel rxcost %u\n", babel_ifp->cost);
write++;
}
if (babel_ifp->channel == BABEL_IF_CHANNEL_INTERFERING) {
vty_out (vty, " babel channel interfering\n");
write++;
} else if(babel_ifp->channel != BABEL_IF_CHANNEL_NONINTERFERING) {
vty_out (vty, " babel channel %d\n",babel_ifp->channel);
write++;
}
} else {
if (CHECK_FLAG (babel_ifp->flags, BABEL_IF_SPLIT_HORIZON)) {
vty_out (vty, " babel split-horizon\n");
write++;
}
if (babel_ifp->cost != BABEL_DEFAULT_RXCOST_WIRELESS) {
vty_out (vty, " babel rxcost %u\n", babel_ifp->cost);
write++;
}
if (babel_ifp->channel == BABEL_IF_CHANNEL_NONINTERFERING) {
vty_out (vty, " babel channel noninterfering\n");
write++;
} else if(babel_ifp->channel != BABEL_IF_CHANNEL_INTERFERING) {
vty_out (vty, " babel channel %d\n",babel_ifp->channel);
write++;
}
}
if_vty_config_end(vty);
write++;
}
return write;
}
/* Output a "network" statement line for each of the enabled interfaces. */
int
babel_enable_if_config_write (struct vty * vty)
{
unsigned int i, lines = 0;
char *str;
for (i = 0; i < vector_active (babel_enable_if); i++)
if ((str = vector_slot (babel_enable_if, i)) != NULL)
{
vty_out (vty, " network %s\n", str);
lines++;
}
return lines;
}
/* functions to allocate or free memory for a babel_interface_nfo, filling
needed fields */
static babel_interface_nfo *
babel_interface_allocate (void)
{
babel_interface_nfo *babel_ifp;
babel_ifp = XCALLOC(MTYPE_BABEL_IF, sizeof(babel_interface_nfo));
/* All flags are unset */
babel_ifp->bucket_time = babel_now.tv_sec;
babel_ifp->bucket = BUCKET_TOKENS_MAX;
babel_ifp->hello_seqno = (frr_weak_random() & 0xFFFF);
babel_ifp->rtt_decay = BABEL_DEFAULT_RTT_DECAY;
babel_ifp->rtt_min = BABEL_DEFAULT_RTT_MIN;
babel_ifp->rtt_max = BABEL_DEFAULT_RTT_MAX;
babel_ifp->max_rtt_penalty = BABEL_DEFAULT_MAX_RTT_PENALTY;
babel_ifp->hello_interval = BABEL_DEFAULT_HELLO_INTERVAL;
babel_ifp->update_interval = BABEL_DEFAULT_UPDATE_INTERVAL;
babel_ifp->channel = BABEL_IF_CHANNEL_INTERFERING;
babel_set_wired_internal(babel_ifp, 0);
return babel_ifp;
}
static void
babel_interface_free (babel_interface_nfo *babel_ifp)
{
XFREE(MTYPE_BABEL_IF, babel_ifp);
}
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