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redist.c
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/*
* Copyright (c) 2013 Axel Neumann
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdarg.h>
#include <syslog.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/un.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <paths.h>
#include <netinet/in.h>
#include "bmx.h"
#include "msg.h"
#include "plugin.h"
#include "schedule.h"
#include "tools.h"
#include "metrics.h"
#include "ip.h"
#include "hna.h"
#include "redist.h"
void redist_dbg(int8_t dbgl, int8_t dbgt, const char *func, struct redist_in_node *zrn, struct sys_route_dict *zapi_rt_dict, char* misc1, char* misc2)
{
dbgf(dbgl, dbgt, "%s %s %s old=%d cnt=%d %s route=%s via=%s type=%s table=%d ifidx=%d metric=%d distance=%d flags=%X message=%X",
func, misc1, misc2, zrn->old, zrn->cnt,
(zrn->cnt < 0) ? "INVALID" : (zrn->old != (!!zrn->cnt)) ? "CHANGED" : "UNCHANGED",
netAsStr(&zrn->k.net), ipXAsStr(zrn->k.net.af, &zrn->k.via),
zrn->k.inType < BMX6_ROUTE_MAX_KNOWN ? zapi_rt_dict[zrn->k.inType].sys2Name : memAsHexStringSep(&zrn->k.inType, 1, 0),
zrn->k.table, zrn->k.ifindex, zrn->metric, zrn->distance, zrn->flags, zrn->message);
}
void update_tunXin6_net_adv_list(struct avl_tree *redist_out_tree, struct list_head *tunXin6_net_adv_list )
{
dbgf_track(DBGT_INFO, "redist changed");
struct avl_node *ran = NULL;
struct redist_out_node *routn;
while (tunXin6_net_adv_list->items) {
struct tunXin6_net_adv_node *tn = list_del_head(tunXin6_net_adv_list);
debugFree(tn, -300509);
}
while ((routn = avl_iterate_item(redist_out_tree, &ran))) {
struct tunXin6_net_adv_node *tn = debugMalloc(sizeof (struct tunXin6_net_adv_node), -300510);
memset(tn, 0, sizeof (*tn));
tn->bandwidth = routn->k.bandwidth;
tn->bmx6_route_type = routn->k.bmx6_route_type;
tn->net = routn->k.net;
tn->tunInDev = strlen(routn->k.tunInDev.str) ? routn->k.tunInDev.str : NULL;
list_add_tail(tunXin6_net_adv_list, &tn->list);
}
my_description_changed = YES;
}
STATIC_FUNC
void redist_rm_overlapping(struct avl_tree *redist_out_tree)
{
dbgf_track(DBGT_INFO, " ");
struct redist_out_node *routn;
struct avl_node *an = NULL;
while ((routn = avl_iterate_item(redist_out_tree, &an))) {
if (!routn->new)
continue;
// find overlapping route entry:
if (routn->minAggregatePrefixLen != MAX_REDIST_AGGREGATE) {
struct redist_out_node *ovlp = NULL;
struct redist_out_node t = {.k =
{.bandwidth = routn->k.bandwidth, .tunInDev = routn->k.tunInDev,
.bmx6_route_type = routn->k.bmx6_route_type, .net = {.af = routn->k.net.af}}};
while ((ovlp = avl_next_item(redist_out_tree, ovlp ? &ovlp->k : &t.k))) {
dbgf_all(DBGT_INFO, "checking overlapping net=%s rtype=%d bw=%d tunIndev=%s, min=%d new=%d in favor of net=%s rtype=%d bw=%d tunInDev=%s min=%d new=%d",
netAsStr(&routn->k.net), routn->k.bmx6_route_type, routn->k.bandwidth.val.u8, routn->k.tunInDev.str, routn->minAggregatePrefixLen, routn->new,
netAsStr(&ovlp->k.net), ovlp->k.bmx6_route_type, ovlp->k.bandwidth.val.u8, ovlp->k.tunInDev.str, ovlp->minAggregatePrefixLen, ovlp->new);
if (memcmp(&ovlp->k.tunInDev, &routn->k.tunInDev, sizeof(IFNAME_T)) ||
ovlp->k.bandwidth.val.u8 != routn->k.bandwidth.val.u8 ||
ovlp->k.bmx6_route_type != routn->k.bmx6_route_type ||
ovlp->k.net.af != routn->k.net.af ||
ovlp->k.net.mask >= routn->k.net.mask)
break;
if (!ovlp->new || ovlp->k.net.mask < routn->minAggregatePrefixLen)
continue;
if (is_ip_net_equal(&ovlp->k.net.ip, &routn->k.net.ip, ovlp->k.net.mask, routn->k.net.af)) {
routn->new = 0;
ovlp->minAggregatePrefixLen = XMAX(ovlp->minAggregatePrefixLen, routn->minAggregatePrefixLen);
dbgf_all(DBGT_INFO, "disable overlapping net=%s in favor of net=%s",
netAsStr(&routn->k.net), netAsStr(&ovlp->k.net));
break;
}
}
}
}
}
STATIC_FUNC
void redist_rm_aggregatable(struct avl_tree *redist_out_tree)
{
struct redist_out_node *r1;
struct avl_node *an = NULL;
struct redist_out_node rtn;
memset(&rtn, 0, sizeof (rtn));
uint8_t more = YES;
while (more) {
dbgf_track(DBGT_INFO, " ");
more = NO;
while ((r1 = avl_iterate_item(redist_out_tree, &an))) {
uint8_t v4 = (r1->k.net.af == AF_INET);
uint8_t b1 = bit_get((uint8_t*)&(r1->k.net.ip), 128, r1->k.net.mask + (v4 ? 96 : 0) - 1);
dbgf_all(DBGT_INFO, "checking aggregation for net=%s rtype=%d bw=%d tunInDev=%s min=%d new=%d lastBit=%d %s",
netAsStr(&r1->k.net), r1->k.bmx6_route_type, r1->k.bandwidth.val.u8, r1->k.tunInDev.str, r1->minAggregatePrefixLen,
r1->new, b1, memAsHexStringSep(&r1->k.net.ip, 16, 2));
if (!r1->new || !r1->k.net.mask || r1->k.net.mask <= r1->minAggregatePrefixLen || !b1)
continue;
struct redist_out_node s0 = *r1;
bit_set((uint8_t*)&(s0.k.net.ip), 128, s0.k.net.mask + (v4 ? 96 : 0) - 1, 0);
struct redist_out_node *r0 = avl_find_item(redist_out_tree, &s0.k);
dbgf_all(DBGT_INFO, " with net=%s rtype=%d bw=%d tunInDev=%s min=%d new=%d %s",
netAsStr(&s0.k.net), s0.k.bmx6_route_type, s0.k.bandwidth.val.u8, s0.k.tunInDev.str, s0.minAggregatePrefixLen,
s0.new, memAsHexStringSep(&s0.k.net.ip, 16, 2));
if (r0 && r0->new && r0->k.net.mask > r0->minAggregatePrefixLen) {
struct redist_out_node *ra;
s0.k.net.mask--;
if ((ra = avl_find_item(redist_out_tree, &s0.k))) {
assertion(-501426, (!ra->new));
} else {
ra = debugMalloc(sizeof (s0), -300503);
*ra = s0;
avl_insert(redist_out_tree, ra, -300504);
}
ra->new = 1;
r0->new = 0;
r1->new = 0;
ra->minAggregatePrefixLen = XMAX(r0->minAggregatePrefixLen, r1->minAggregatePrefixLen);
more = YES;
dbgf_track(DBGT_INFO, " aggregate neighboring net0=%s net1=%s into new=%s",
netAsStr(&r0->k.net), netAsStr(&r1->k.net), netAsStr(&ra->k.net));
}
}
}
}
struct redistr_opt_node *matching_redist_opt(struct redist_in_node *rin, struct avl_tree *redist_opt_tree, struct sys_route_dict *rt_dict)
{
struct redistr_opt_node *roptn;
struct avl_node *ropti;
for (ropti = NULL; (roptn = avl_iterate_item(redist_opt_tree, &ropti));) {
if (roptn->net.af && roptn->net.af != rin->k.net.af) {
dbgf_all(DBGT_INFO, "skipping %s AF", roptn->nameKey);
continue;
}
if (roptn->table != rin->k.table) {
dbgf_all(DBGT_INFO, "skipping %s table", roptn->nameKey);
continue;
}
if (roptn->bandwidth.val.u8 == 0) {
dbgf_all(DBGT_INFO, "skipping %s bandwidth", roptn->nameKey);
continue;
}
if (rin->k.inType > BMX6_ROUTE_MAX_SUPP) {
dbgf_all(DBGT_INFO, "skipping unsupported routeType=%d", rin->k.inType);
continue;
}
if (/*roptn->bmx6_redist_bits &&*/
!roptn->bmx6_redist_all &&
!bit_get(((uint8_t*) & roptn->bmx6_redist_bits),
sizeof (roptn->bmx6_redist_bits)*8, rt_dict[rin->k.inType].sys2bmx)) {
dbgf_all(DBGT_INFO, "skipping %s redist bits", roptn->nameKey);
continue;
}
if (roptn->bmx6_redist_sys && roptn->bmx6_redist_sys != rin->k.inType) {
dbgf_all(DBGT_INFO, "skipping %s redist sys=%d != %d", roptn->nameKey, roptn->bmx6_redist_sys, rin->k.inType);
continue;
}
if ((roptn->net.mask != MIN_REDIST_PREFIX ||
roptn->netPrefixMin != DEF_REDIST_PREFIX_MIN ||
roptn->netPrefixMax != DEF_REDIST_PREFIX_MAX)
&& !(
(roptn->netPrefixMax == TYP_REDIST_PREFIX_NET ?
roptn->net.mask >= rin->k.net.mask : roptn->netPrefixMax >= rin->k.net.mask) &&
(roptn->netPrefixMin == TYP_REDIST_PREFIX_NET ?
roptn->net.mask <= rin->k.net.mask : roptn->netPrefixMin <= rin->k.net.mask) &&
is_ip_net_equal(&roptn->net.ip, &rin->k.net.ip, XMIN(roptn->net.mask, rin->k.net.mask), roptn->net.af))) {
dbgf_all(DBGT_INFO, "skipping %s prefix", roptn->nameKey);
continue;
}
return roptn;
}
return NULL;
}
IDM_T redistribute_routes(struct avl_tree *redist_out_tree, struct avl_tree *redist_in_tree, struct avl_tree *redist_opt_tree, struct sys_route_dict *rt_dict)
{
dbgf_track(DBGT_INFO, " ");
IDM_T redist_changed = NO;
struct redist_in_node *rin;
struct avl_node *rii;
struct redistr_opt_node *roptn;
struct redist_out_node *routn;
struct avl_node *routi;
struct redist_out_node routf;
for (routi = NULL; (routn = avl_iterate_item(redist_out_tree, &routi));) {
routn->new = 0;
routn->minAggregatePrefixLen = 0;
}
for (rii = NULL; (rin = avl_iterate_item(redist_in_tree, &rii));) {
ASSERTION(-500000, IMPLIES(rin->roptn, rin->roptn == matching_redist_opt(rin, redist_opt_tree, rt_dict)));
if ((roptn = rin->roptn ? rin->roptn : matching_redist_opt(rin, redist_opt_tree, rt_dict))) {
memset(&routf, 0, sizeof (routf));
routf.k.bmx6_route_type = rt_dict[rin->k.inType].sys2bmx;
routf.k.net = roptn->net.mask >= rin->k.net.mask ? roptn->net : rin->k.net;
routf.k.bandwidth = roptn->bandwidth;
if ( roptn->tunInDev )
strcpy(routf.k.tunInDev.str, roptn->tunInDev);
routf.k.must_be_one = 1; // to let alv_next_item find the first one
routf.minAggregatePrefixLen = roptn->minAggregatePrefixLen;
if (!(routn = avl_find_item(redist_out_tree, &routf.k))) {
*(routn = debugMalloc(sizeof (routf), -300505)) = routf;
avl_insert(redist_out_tree, routn, -300506);
if ( __dbgf_track() ) {
redist_dbg(DBGL_CHANGES, DBGT_INFO, __func__, rin, rt_dict, "parsing", "adding");
}
} else {
if ( __dbgf_track() ) {
redist_dbg(DBGL_CHANGES, DBGT_INFO, __func__, rin, rt_dict, "parsing", "reusing");
}
}
routn->new = 1;
routn->minAggregatePrefixLen = XMAX(routn->minAggregatePrefixLen, roptn->minAggregatePrefixLen);
}
}
redist_rm_overlapping(redist_out_tree);
redist_rm_aggregatable(redist_out_tree);
// remove_old_routes:
memset(&routf, 0, sizeof (routf));
while ((routn = avl_next_item(redist_out_tree, &routf.k))) {
routf = *routn;
if (routn->new != routn->old) { // 10, 11, 01, 00
redist_changed = YES;
dbgf_track(DBGT_INFO, "CHANGED: old=%d new=%d rtype=%d bandwith=%d net=%s",
routn->old, routn->new, routn->k.bmx6_route_type, routn->k.bandwidth.val.u8, netAsStr(&routn->k.net));
}
if (!routn->new) {
avl_remove(redist_out_tree, &routn->k, -300507);
debugFree(routn, -300508);
continue;
}
routn->new = 0;
routn->old = 1;
}
return redist_changed;
}
int32_t opt_redist(uint8_t cmd, uint8_t _save, struct opt_type *opt, struct opt_parent *patch, struct ctrl_node *cn, struct avl_tree *redist_opt_tree, uint8_t *changed)
{
TRACE_FUNCTION_CALL;
struct redistr_opt_node *ron = NULL;
if (cmd == OPT_ADJUST || cmd == OPT_CHECK || cmd == OPT_APPLY) {
struct opt_child *c = NULL;
char name[NETWORK_NAME_LEN] = {0};
dbgf_all(DBGT_INFO, "diff=%d cmd=%s save=%d opt=%s patch=%s",
patch->diff, opt_cmd2str[cmd], _save, opt->name, patch->val);
if (AF_CFG != AF_INET6)
return FAILURE;
if (strlen(patch->val) >= NETWORK_NAME_LEN || validate_name_string(patch->val, strlen(patch->val) + 1, NULL) != SUCCESS)
return FAILURE;
strcpy(name, patch->val);
ron = avl_find_item(redist_opt_tree, name);
struct net_key net = ZERO_NET_KEY;
net.af = ron ? ron->net.af : 0; // family of ARG_TUN_SEARCH_NETWORK and ARG_TUN_SEARCH_SRC must be the same!!!
if (cmd == OPT_APPLY) {
*changed = YES;
//unlink_tun_net(NULL, NULL, NULL);
if (!ron && patch->diff != DEL) {
ron = debugMalloc(sizeof (struct redistr_opt_node), -300496);
memset(ron, 0, sizeof (struct redistr_opt_node));
strcpy(ron->nameKey, name);
avl_insert(redist_opt_tree, ron, -300497);
ron->hysteresis = DEF_REDIST_HYSTERESIS;
ron->netPrefixMin = DEF_REDIST_PREFIX_MIN;
ron->netPrefixMax = DEF_REDIST_PREFIX_MAX;
ron->table = DEF_REDIST_TABLE;
UMETRIC_T bw = DEF_TUN_IN_BW;
ron->bandwidth = umetric_to_fmu8(&bw);
} else if (ron && patch->diff == DEL) {
avl_remove(redist_opt_tree, &ron->nameKey, -300498);
debugFree(ron, -300499);
}
}
while ((c = list_iterate(&patch->childs_instance_list, c))) {
if (!strcmp(c->opt->name, ARG_REDIST_NET)) {
if (c->val) {
if (str2netw(c->val, &net.ip, cn, &net.mask, &net.af, NO) == FAILURE)
return FAILURE;
set_opt_child_val(c, netAsStr(&net));
if (cmd == OPT_APPLY && ron)
ron->net = net;
} else if (cmd == OPT_APPLY && ron) {
setNet(&ron->net, net.af, 0, NULL);
}
} else if (!strcmp(c->opt->name, ARG_REDIST_BW)) {
if (c->val) {
char *endptr;
unsigned long long int ull = strtoull(c->val, &endptr, 10);
if (ull > MAX_TUN_IN_BW || ull < MIN_TUN_IN_BW || *endptr != '\0')
return FAILURE;
assertion(-501430, (sizeof (ull) == sizeof (UMETRIC_T)));
if (cmd == OPT_APPLY && ron)
ron->bandwidth = umetric_to_fmu8((UMETRIC_T*) & ull);
} else if (cmd == OPT_APPLY && ron) {
UMETRIC_T bw = DEF_TUN_IN_BW;
ron->bandwidth = umetric_to_fmu8(&bw);
}
} else if (!strcmp(c->opt->name, ARG_TUN_DEV)) {
if (c->val ) {
if (strlen(c->val) >= NETWORK_NAME_LEN ||
validate_name_string(c->val, strlen(c->val) + 1, NULL) != SUCCESS ||
strncmp(tun_name_prefix.str, c->val, strlen(tun_name_prefix.str))) {
dbgf_cn(cn, DBGL_SYS, DBGT_ERR, "invalid name: %s (MUST begin with: %s)",
c->val, tun_name_prefix.str);
return FAILURE;
}
if (cmd == OPT_APPLY && ron)
ron->tunInDev = c->val;
} else if (cmd == OPT_APPLY && ron) {
ron->tunInDev = NULL;
}
} else if (cmd == OPT_APPLY && ron) {
if (!strcmp(c->opt->name, ARG_REDIST_PREFIX_MIN)) {
ron->netPrefixMin = c->val ? strtol(c->val, NULL, 10) : DEF_REDIST_PREFIX_MIN;
} else if (!strcmp(c->opt->name, ARG_REDIST_PREFIX_MAX)) {
ron->netPrefixMax = c->val ? strtol(c->val, NULL, 10) : DEF_REDIST_PREFIX_MAX;
} else if (!strcmp(c->opt->name, ARG_REDIST_TABLE)) {
ron->table = c->val ? strtol(c->val, NULL, 10) : DEF_REDIST_TABLE;
} else if (!strcmp(c->opt->name, ARG_REDIST_AGGREGATE)) {
ron->minAggregatePrefixLen = c->val ? strtol(c->val, NULL, 10) : DEF_REDIST_AGGREGATE;
} else if (!strcmp(c->opt->name, ARG_REDIST_HYSTERESIS)) {
ron->hysteresis = c->val ? strtol(c->val, NULL, 10) : DEF_REDIST_HYSTERESIS;
} else if (!strcmp(c->opt->name, ARG_ROUTE_ALL)) {
ron->bmx6_redist_all = (c->val && strtol(c->val, NULL, 10) == 1 ) ? 1 : 0;
} else if (!strcmp(c->opt->name, ARG_ROUTE_SYS)) {
ron->bmx6_redist_sys = c->val ? strtol(c->val, NULL, 10) : 0;
} else {
uint8_t t;
for (t = 0; t <= BMX6_ROUTE_MAX_KNOWN; t++) {
if (bmx6_rt_dict[t].sys2Name && !strcmp(c->opt->name, bmx6_rt_dict[t].sys2Name)) {
bit_set((uint8_t*) &ron->bmx6_redist_bits,
sizeof (ron->bmx6_redist_bits) * 8,
t, (c->val && strtol(c->val, NULL, 10) == 1) ? 1 : 0);
}
}
}
}
}
} else if (cmd == OPT_UNREGISTER) {
struct avl_node *an = NULL;
while ((ron = avl_iterate_item(redist_opt_tree, &an))) {
avl_remove(redist_opt_tree, &ron->nameKey, -300501);
debugFree(ron, -300502);
}
}
return SUCCESS;
}