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bisect.c
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/*
* Copyright (C) 2009-2012 B.A.T.M.A.N. contributors:
*
* Marek Lindner <lindner_marek@yahoo.de>
*
* 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
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "main.h"
#include "bisect.h"
#include "bat-hosts.h"
#include "hash.h"
#include "functions.h"
static struct hashtable_t *node_hash = NULL;
static struct bat_node *curr_bat_node = NULL;
static void bisect_usage(void)
{
printf("Usage: batctl bisect [options] <file1> <file2> .. <fileN>\n");
printf("options:\n");
printf(" \t -h print this help\n");
printf(" \t -l run a loop detection of given mac address or bat-host (default)\n");
printf(" \t -n don't convert addresses to bat-host names\n");
printf(" \t -o only display orig events that affect given mac address or bat-host\n");
printf(" \t -r print routing tables of given mac address or bat-host\n");
printf(" \t -s seqno range to limit the output\n");
printf(" \t -t trace seqnos of given mac address or bat-host\n");
}
static int compare_name(void *data1, void *data2)
{
return (memcmp(data1, data2, NAME_LEN) == 0 ? 1 : 0);
}
static int choose_name(void *data, int32_t size)
{
unsigned char *key= data;
uint32_t hash = 0, m_size = NAME_LEN - 1;
size_t i;
for (i = 0; i < m_size; i++) {
hash += key[i];
hash += (hash << 10);
hash ^= (hash >> 6);
}
hash += (hash << 3);
hash ^= (hash >> 11);
hash += (hash << 15);
return (hash % size);
}
static struct bat_node *node_get(char *name)
{
struct bat_node *bat_node;
if (!name)
return NULL;
bat_node = (struct bat_node *)hash_find(node_hash, name);
if (bat_node)
goto out;
bat_node = malloc(sizeof(struct bat_node));
if (!bat_node) {
fprintf(stderr, "Could not allocate memory for data structure (out of mem?) - skipping");
return NULL;
}
strncpy(bat_node->name, name, NAME_LEN);
INIT_LIST_HEAD_FIRST(bat_node->orig_event_list);
INIT_LIST_HEAD_FIRST(bat_node->rt_table_list);
memset(bat_node->loop_magic, 0, sizeof(bat_node->loop_magic));
memset(bat_node->loop_magic2, 0, sizeof(bat_node->loop_magic2));
hash_add(node_hash, bat_node);
out:
return bat_node;
}
static struct orig_event *orig_event_new(struct bat_node *bat_node, struct bat_node *orig_node)
{
struct orig_event *orig_event;
orig_event = malloc(sizeof(struct orig_event));
if (!orig_event) {
fprintf(stderr, "Could not allocate memory for orig event structure (out of mem?) - skipping");
return NULL;
}
INIT_LIST_HEAD(&orig_event->list);
INIT_LIST_HEAD_FIRST(orig_event->event_list);
INIT_LIST_HEAD_FIRST(orig_event->rt_hist_list);
orig_event->orig_node = orig_node;
list_add_tail(&orig_event->list, &bat_node->orig_event_list);
return orig_event;
}
static struct orig_event *orig_event_get_by_name(struct bat_node *bat_node, char *orig)
{
struct bat_node *orig_node;
struct orig_event *orig_event;
if (!bat_node)
return NULL;
list_for_each_entry(orig_event, &bat_node->orig_event_list, list) {
if (compare_name(orig_event->orig_node->name, orig))
return orig_event;
}
orig_node = node_get(orig);
if (!orig_node)
return NULL;
return orig_event_new(bat_node, orig_node);
}
static struct orig_event *orig_event_get_by_ptr(struct bat_node *bat_node, struct bat_node *orig_node)
{
struct orig_event *orig_event;
if (!bat_node)
return NULL;
list_for_each_entry(orig_event, &bat_node->orig_event_list, list) {
if (orig_event->orig_node == orig_node)
return orig_event;
}
return orig_event_new(bat_node, orig_node);
}
static void node_free(void *data)
{
struct orig_event *orig_event, *orig_event_tmp;
struct seqno_event *seqno_event, *seqno_event_tmp;
struct rt_table *rt_table, *rt_table_tmp;
struct rt_hist *rt_hist, *rt_hist_tmp;
struct bat_node *bat_node = (struct bat_node *)data;
list_for_each_entry_safe(orig_event, orig_event_tmp, &bat_node->orig_event_list, list) {
list_for_each_entry_safe(seqno_event, seqno_event_tmp, &orig_event->event_list, list) {
list_del((struct list_head *)&orig_event->event_list, &seqno_event->list, &orig_event->event_list);
free(seqno_event);
}
list_for_each_entry_safe(rt_hist, rt_hist_tmp, &orig_event->rt_hist_list, list) {
list_del((struct list_head *)&orig_event->rt_hist_list, &rt_hist->list, &orig_event->rt_hist_list);
free(rt_hist);
}
list_del((struct list_head *)&bat_node->orig_event_list, &orig_event->list, &bat_node->orig_event_list);
free(orig_event);
}
list_for_each_entry_safe(rt_table, rt_table_tmp, &bat_node->rt_table_list, list) {
list_del((struct list_head *)&bat_node->rt_table_list, &rt_table->list, &bat_node->rt_table_list);
free(rt_table->entries);
free(rt_table);
}
free(bat_node);
}
static int routing_table_new(char *orig, char *next_hop, char *old_next_hop, char rt_flag)
{
struct bat_node *next_hop_node;
struct orig_event *orig_event;
struct seqno_event *seqno_event;
struct rt_table *rt_table, *prev_rt_table = NULL;
struct rt_hist *rt_hist;
int i, j = -1;
if (!curr_bat_node) {
fprintf(stderr, "Routing table change without preceding OGM - skipping");
goto err;
}
if (!orig) {
fprintf(stderr, "Invalid originator found - skipping");
goto err;
}
if ((rt_flag != RT_FLAG_DELETE) && (!next_hop)) {
fprintf(stderr, "Invalid next hop found - skipping");
goto err;
}
if ((rt_flag == RT_FLAG_UPDATE) && (!old_next_hop)) {
fprintf(stderr, "Invalid old next hop found - skipping");
goto err;
}
next_hop_node = node_get(next_hop);
if ((rt_flag != RT_FLAG_DELETE) && (!next_hop_node))
goto err;
orig_event = orig_event_get_by_name(curr_bat_node, orig);
if (!orig_event)
goto err;
if (list_empty(&orig_event->event_list)) {
fprintf(stderr, "Routing table change without any preceding OGM of that originator - skipping");
goto err;
}
if (!compare_name(((struct seqno_event *)(orig_event->event_list.prev))->orig->name, orig)) {
fprintf(stderr, "Routing table change does not match with last received OGM - skipping");
goto err;
}
rt_table = malloc(sizeof(struct rt_table));
if (!rt_table) {
fprintf(stderr, "Could not allocate memory for routing table (out of mem?) - skipping");
goto err;
}
rt_hist = malloc(sizeof(struct rt_hist));
if (!rt_hist) {
fprintf(stderr, "Could not allocate memory for routing history (out of mem?) - skipping");
goto table_free;
}
INIT_LIST_HEAD(&rt_table->list);
rt_table->num_entries = 1;
INIT_LIST_HEAD(&rt_hist->list);
rt_hist->prev_rt_hist = NULL;
rt_hist->next_hop = next_hop_node;
rt_hist->flags = rt_flag;
memset(rt_hist->loop_magic, 0, sizeof(rt_hist->loop_magic));
if (!(list_empty(&orig_event->rt_hist_list)))
rt_hist->prev_rt_hist = (struct rt_hist *)(orig_event->rt_hist_list.prev);
if (!(list_empty(&curr_bat_node->rt_table_list)))
prev_rt_table = (struct rt_table *)(curr_bat_node->rt_table_list.prev);
switch (rt_flag) {
case RT_FLAG_ADD:
if (prev_rt_table)
rt_table->num_entries = prev_rt_table->num_entries + 1;
break;
case RT_FLAG_UPDATE:
if (prev_rt_table) {
rt_table->num_entries = prev_rt_table->num_entries + 1;
/* if we had that route already we just change the entry */
for (i = 0; i < prev_rt_table->num_entries; i++) {
if (compare_name(orig, prev_rt_table->entries[i].orig)) {
rt_table->num_entries = prev_rt_table->num_entries;
break;
}
}
}
break;
case RT_FLAG_DELETE:
if (prev_rt_table) {
rt_table->num_entries = prev_rt_table->num_entries + 1;
/* if we had that route already we just change the entry */
for (i = 0; i < prev_rt_table->num_entries; i++) {
if (compare_name(orig, prev_rt_table->entries[i].orig)) {
rt_table->num_entries = prev_rt_table->num_entries;
break;
}
}
if (rt_table->num_entries != prev_rt_table->num_entries) {
fprintf(stderr,
"Found a delete entry of orig '%s' but no existing record - skipping",
orig);
goto rt_hist_free;
}
/**
* we need to create a special seqno event as a timer instead
* of an OGM triggered that event
*/
seqno_event = malloc(sizeof(struct seqno_event));
if (!seqno_event) {
fprintf(stderr, "Could not allocate memory for delete seqno event (out of mem?) - skipping");
goto rt_hist_free;
}
INIT_LIST_HEAD(&seqno_event->list);
seqno_event->orig = node_get(orig);
seqno_event->neigh = NULL;
seqno_event->prev_sender = NULL;
seqno_event->seqno = -1;
seqno_event->tq = -1;
seqno_event->ttl = -1;
seqno_event->rt_hist = NULL;
list_add_tail(&seqno_event->list, &orig_event->event_list);
}
break;
default:
fprintf(stderr, "Unknown rt_flag received: %i - skipping", rt_flag);
goto rt_hist_free;
}
rt_table->entries = malloc(sizeof(struct rt_entry) * rt_table->num_entries);
if (!rt_table->entries) {
fprintf(stderr, "Could not allocate memory for routing table entries (out of mem?) - skipping");
goto rt_hist_free;
}
if (prev_rt_table) {
for (i = 0; i < prev_rt_table->num_entries; i++) {
/* if we have a previously deleted item don't copy it over */
if (prev_rt_table->entries[i].flags == RT_FLAG_DELETE) {
rt_table->num_entries--;
continue;
}
/**
* if we delete one item the entries are not in sync anymore,
* therefore we need to counters: one for the old and one for
* the new routing table
*/
j++;
memcpy((char *)&rt_table->entries[j],
(char *)&prev_rt_table->entries[i],
sizeof(struct rt_entry));
if (compare_name(orig, rt_table->entries[j].orig)) {
if (rt_flag != RT_FLAG_DELETE)
rt_table->entries[j].next_hop = next_hop_node;
rt_table->entries[j].flags = rt_flag;
continue;
}
rt_table->entries[j].flags = 0;
}
}
if ((rt_table->num_entries == 1) || (rt_table->num_entries != j + 1)) {
i = rt_table->num_entries;
strncpy(rt_table->entries[i - 1].orig, orig, NAME_LEN);
rt_table->entries[i - 1].next_hop = next_hop_node;
rt_table->entries[i - 1].flags = rt_flag;
}
rt_table->rt_hist = rt_hist;
rt_hist->seqno_event = (struct seqno_event *)(orig_event->event_list.prev);
rt_hist->seqno_event->rt_hist = rt_hist;
rt_hist->rt_table = rt_table;
list_add_tail(&rt_table->list, &curr_bat_node->rt_table_list);
list_add_tail(&rt_hist->list, &orig_event->rt_hist_list);
return 1;
rt_hist_free:
free(rt_hist);
table_free:
free(rt_table);
err:
return 0;
}
static int seqno_event_new(char *iface_addr, char *orig, char *prev_sender, char *neigh, long long seqno, int tq, int ttl)
{
struct bat_node *orig_node, *neigh_node, *prev_sender_node;
struct orig_event *orig_event;
struct seqno_event *seqno_event;
if (!iface_addr) {
fprintf(stderr, "Invalid interface address found - skipping");
goto err;
}
if (!orig) {
fprintf(stderr, "Invalid originator found - skipping");
goto err;
}
if (!neigh) {
fprintf(stderr, "Invalid neighbor found - skipping");
goto err;
}
if ((seqno < 0) || (seqno > UINT32_MAX)) {
fprintf(stderr, "Invalid sequence number found (%lli) - skipping", seqno);
goto err;
}
if ((tq < 0) || (tq > UINT8_MAX)) {
fprintf(stderr, "Invalid tq value found (%i) - skipping", tq);
goto err;
}
if ((ttl < 0) || (ttl > UINT8_MAX)) {
fprintf(stderr, "Invalid ttl value found (%i) - skipping", ttl);
goto err;
}
curr_bat_node = node_get(iface_addr);
if (!curr_bat_node)
goto err;
orig_node = node_get(orig);
if (!orig_node)
goto err;
neigh_node = node_get(neigh);
if (!neigh_node)
goto err;
prev_sender_node = node_get(prev_sender);
if (!prev_sender_node)
goto err;
orig_event = orig_event_get_by_ptr(curr_bat_node, orig_node);
if (!orig_event)
goto err;
seqno_event = malloc(sizeof(struct seqno_event));
if (!seqno_event) {
fprintf(stderr, "Could not allocate memory for seqno event (out of mem?) - skipping");
goto err;
}
INIT_LIST_HEAD(&seqno_event->list);
seqno_event->orig = orig_node;
seqno_event->neigh = neigh_node;
seqno_event->prev_sender = prev_sender_node;
seqno_event->seqno = seqno;
seqno_event->tq = tq;
seqno_event->ttl = ttl;
seqno_event->rt_hist = NULL;
list_add_tail(&seqno_event->list, &orig_event->event_list);
return 1;
err:
return 0;
}
static int parse_log_file(char *file_path)
{
FILE *fd;
char line_buff[MAX_LINE], *start_ptr, *start_ptr_safe, *tok_ptr;
char *neigh, *iface_addr, *orig, *prev_sender, rt_flag;
int line_count = 0, tq, ttl, i, res, max;
long long seqno;
fd = fopen(file_path, "r");
if (!fd) {
fprintf(stderr, "Error - could not open file '%s': %s\n", file_path, strerror(errno));
return 0;
}
while (fgets(line_buff, sizeof(line_buff), fd) != NULL) {
/* ignore the timestamp at the beginning of each line */
start_ptr = line_buff + 13;
line_count++;
if (strstr(start_ptr, "Received BATMAN packet via NB")) {
strtok_r(start_ptr, " ", &start_ptr_safe);
neigh = iface_addr = orig = prev_sender = NULL;
seqno = tq = ttl = -1;
for (i = 0; i < 21; i++) {
tok_ptr = strtok_r(NULL, " ", &start_ptr_safe);
if (!tok_ptr)
break;
switch (i) {
case 4:
neigh = tok_ptr;
neigh[strlen(neigh) - 1] = 0;
break;
case 7:
iface_addr = tok_ptr + 1;
iface_addr[strlen(iface_addr) - 1] = 0;
break;
case 10:
orig = tok_ptr;
orig[strlen(orig) - 1] = 0;
break;
case 14:
prev_sender = tok_ptr;
prev_sender[strlen(prev_sender) - 1] = 0;
break;
case 16:
seqno = strtoll(tok_ptr, NULL, 10);
break;
case 18:
tq = strtol(tok_ptr, NULL, 10);
break;
case 20:
ttl = strtol(tok_ptr, NULL, 10);
break;
}
}
if (ttl == -1) {
fprintf(stderr, "Broken 'received packet' line found - skipping [file: %s, line: %i]\n", file_path, line_count);
continue;
}
// fprintf(stderr, "received packet (line %i): neigh: '%s', iface_addr: '%s', orig: '%s', prev_sender: '%s', seqno: %i, tq: %i, ttl: %i\n", line_count, neigh, iface_addr, orig, prev_sender, seqno, tq, ttl);
res = seqno_event_new(iface_addr, orig, prev_sender, neigh, seqno, tq, ttl);
if (res < 1)
fprintf(stderr, " [file: %s, line: %i]\n", file_path, line_count);
} else if (strstr(start_ptr, "Adding route towards") ||
strstr(start_ptr, "Changing route towards") ||
strstr(start_ptr, "Deleting route towards")) {
rt_flag = RT_FLAG_UPDATE;
max = 12;
if (strstr(start_ptr, "Adding route towards")) {
rt_flag = RT_FLAG_ADD;
max = 5;
} else if (strstr(start_ptr, "Deleting route towards")) {
rt_flag = RT_FLAG_DELETE;
max = 3;
}
strtok_r(start_ptr, " ", &start_ptr_safe);
orig = neigh = prev_sender = NULL;
for (i = 0; i < max; i++) {
tok_ptr = strtok_r(NULL, " ", &start_ptr_safe);
if (!tok_ptr)
break;
switch (i) {
case 2:
orig = tok_ptr;
if (rt_flag == RT_FLAG_DELETE)
orig[strlen(orig) - 1] = 0;
break;
case 4:
if (rt_flag == RT_FLAG_ADD) {
neigh = tok_ptr;
neigh[strlen(neigh) - 2] = 0;
}
break;
case 5:
neigh = tok_ptr;
break;
case 9:
prev_sender = tok_ptr;
prev_sender[strlen(prev_sender) - 2] = 0;
break;
}
}
// printf("route (file: %s, line %i): orig: '%s', neigh: '%s', prev_sender: '%s'\n",
// file_path, line_count, orig, neigh, prev_sender);
if (((rt_flag == RT_FLAG_ADD) && (!neigh)) ||
((rt_flag == RT_FLAG_UPDATE) && (!prev_sender)) ||
((rt_flag == RT_FLAG_DELETE) && (!orig))) {
fprintf(stderr, "Broken '%s route' line found - skipping [file: %s, line: %i]\n",
(rt_flag == RT_FLAG_UPDATE ? "changing" :
(rt_flag == RT_FLAG_ADD ? "adding" : "deleting")),
file_path, line_count);
continue;
}
res = routing_table_new(orig, neigh, prev_sender, rt_flag);
if (res < 1)
fprintf(stderr, " [file: %s, line: %i]\n", file_path, line_count);
}
}
// printf("File '%s' parsed (lines: %i)\n", file_path, line_count);
fclose(fd);
curr_bat_node = NULL;
return 1;
}
static struct rt_hist *get_rt_hist_by_seqno(struct orig_event *orig_event, long long seqno)
{
struct seqno_event *seqno_event;
struct rt_hist *rt_hist = NULL;
list_for_each_entry(seqno_event, &orig_event->event_list, list) {
if (seqno_event->seqno > seqno)
break;
if (seqno_event->rt_hist)
rt_hist = seqno_event->rt_hist;
}
return rt_hist;
}
static struct rt_hist *get_rt_hist_by_node_seqno(struct bat_node *bat_node, struct bat_node *orig_node, long long seqno)
{
struct orig_event *orig_event;
struct rt_hist *rt_hist;
orig_event = orig_event_get_by_ptr(bat_node, orig_node);
if (!orig_event)
return NULL;
rt_hist = get_rt_hist_by_seqno(orig_event, seqno);
return rt_hist;
}
static int print_rt_path_at_seqno(struct bat_node *src_node, struct bat_node *dst_node,
struct bat_node *next_hop, long long seqno, long long seqno_rand, int read_opt)
{
struct bat_node *next_hop_tmp;
struct orig_event *orig_event;
struct rt_hist *rt_hist;
char curr_loop_magic[LOOP_MAGIC_LEN];
memset(curr_loop_magic, 0, LOOP_MAGIC_LEN);
snprintf(curr_loop_magic, LOOP_MAGIC_LEN, "%s%s%lli%lli", src_node->name,
dst_node->name, seqno, seqno_rand);
printf("Path towards %s (seqno %lli ",
get_name_by_macstr(dst_node->name, read_opt), seqno);
printf("via neigh %s):", get_name_by_macstr(next_hop->name, read_opt));
next_hop_tmp = next_hop;
while (1) {
printf(" -> %s%s",
get_name_by_macstr(next_hop_tmp->name, read_opt),
(dst_node == next_hop_tmp ? "." : ""));
/* destination reached */
if (dst_node == next_hop_tmp)
break;
orig_event = orig_event_get_by_ptr(next_hop_tmp, dst_node);
if (!orig_event)
goto out;
/* no more data - path seems[tm] fine */
if (list_empty(&orig_event->event_list))
goto out;
/* same here */
if (list_empty(&orig_event->rt_hist_list))
goto out;
/* we are running in a loop */
if (memcmp(curr_loop_magic, next_hop_tmp->loop_magic, LOOP_MAGIC_LEN) == 0) {
printf(" aborted due to loop!");
goto out;
}
memcpy(next_hop_tmp->loop_magic, curr_loop_magic, sizeof(next_hop_tmp->loop_magic));
rt_hist = get_rt_hist_by_seqno(orig_event, seqno);
/* no more routing data - what can we do ? */
if (!rt_hist)
break;
next_hop_tmp = rt_hist->next_hop;
}
out:
printf("\n");
return 1;
}
static int find_rt_table_change(struct bat_node *src_node, struct bat_node *dst_node,
struct bat_node *curr_node, long long seqno_min, long long seqno_max,
long long seqno_rand, int read_opt)
{
struct orig_event *orig_event;
struct rt_hist *rt_hist, *rt_hist_tmp;
char curr_loop_magic[LOOP_MAGIC_LEN], loop_check = 0;
int res;
long long seqno_tmp, seqno_min_tmp = seqno_min;
/* printf("%i: curr_node: %s ", bla,
get_name_by_macstr(curr_node->name, read_opt));
printf("dst_node: %s [%i - %i]\n",
get_name_by_macstr(dst_node->name, read_opt), seqno_min, seqno_max); */
/* recursion ends here */
if (curr_node == dst_node) {
rt_hist = get_rt_hist_by_node_seqno(src_node, dst_node, seqno_max);
if (rt_hist)
print_rt_path_at_seqno(src_node, dst_node, rt_hist->next_hop,
seqno_max, seqno_rand, read_opt);
return 0;
}
memset(curr_loop_magic, 0, LOOP_MAGIC_LEN);
snprintf(curr_loop_magic, LOOP_MAGIC_LEN, "%s%s%lli%lli",
src_node->name, dst_node->name,
seqno_min_tmp, seqno_rand);
orig_event = orig_event_get_by_ptr(curr_node, dst_node);
if (!orig_event)
goto out;
list_for_each_entry(rt_hist, &orig_event->rt_hist_list, list) {
/* special seqno that indicates an originator timeout */
if (rt_hist->seqno_event->seqno == -1) {
printf("Woot - originator timeout ??\n");
continue;
}
if ((seqno_min_tmp != -1) && (rt_hist->seqno_event->seqno < seqno_min_tmp))
continue;
if ((seqno_max != -1) && (rt_hist->seqno_event->seqno >= seqno_max))
continue;
/* we are running in a loop */
if (memcmp(curr_loop_magic, rt_hist->loop_magic, LOOP_MAGIC_LEN) == 0) {
rt_hist_tmp = get_rt_hist_by_node_seqno(src_node, dst_node,
rt_hist->seqno_event->seqno);
if (rt_hist_tmp)
print_rt_path_at_seqno(src_node, dst_node, rt_hist_tmp->next_hop,
rt_hist->seqno_event->seqno, seqno_rand, read_opt);
goto loop;
}
memcpy(rt_hist->loop_magic, curr_loop_magic, sizeof(rt_hist->loop_magic));
loop_check = 1;
/* printf("validate route after change (seqno %i) at node: %s\n",
rt_hist->seqno_event->seqno,
get_name_by_macstr(curr_node->name, read_opt)); */
res = find_rt_table_change(src_node, dst_node, rt_hist->next_hop,
seqno_min_tmp, rt_hist->seqno_event->seqno,
seqno_rand, read_opt);
seqno_min_tmp = rt_hist->seqno_event->seqno + 1;
/* find_rt_table_change() did not run into a loop and printed the path */
if (res == 0)
continue;
/**
* retrieve routing table towards dst at that point and
* print the routing path
**/
rt_hist_tmp = get_rt_hist_by_node_seqno(src_node, dst_node, rt_hist->seqno_event->seqno);
if (!rt_hist_tmp)
continue;
print_rt_path_at_seqno(src_node, dst_node, rt_hist_tmp->next_hop,
rt_hist->seqno_event->seqno, seqno_rand, read_opt);
}
/**
* if we have no routing table changes within the seqno range
* the loop detection above won't be triggered
**/
if (!loop_check) {
if (memcmp(curr_loop_magic, curr_node->loop_magic2, LOOP_MAGIC_LEN) == 0) {
rt_hist_tmp = get_rt_hist_by_node_seqno(src_node, dst_node, seqno_min);
if (rt_hist_tmp)
print_rt_path_at_seqno(src_node, dst_node, rt_hist_tmp->next_hop,
seqno_min, seqno_rand, read_opt);
/* no need to print the path twice */
if (seqno_min == seqno_max)
goto out;
else
goto loop;
}
memcpy(curr_node->loop_magic2, curr_loop_magic, sizeof(curr_node->loop_magic2));
}
seqno_tmp = seqno_max - 1;
if (seqno_min == seqno_max)
seqno_tmp = seqno_max;
rt_hist = get_rt_hist_by_seqno(orig_event, seqno_tmp);
if (rt_hist)
return find_rt_table_change(src_node, dst_node, rt_hist->next_hop,
seqno_min_tmp, seqno_max, seqno_rand, read_opt);
out:
return -1;
loop:
return -2;
}
static void loop_detection(char *loop_orig, long long seqno_min, long long seqno_max, char *filter_orig, int read_opt)
{
struct bat_node *bat_node;
struct orig_event *orig_event;
struct hash_it_t *hashit = NULL;
struct rt_hist *rt_hist, *prev_rt_hist;
long long last_seqno = -1, seqno_count = 0;
int res;
char check_orig[NAME_LEN];
printf("\nAnalyzing routing tables ");
/* if no option was given loop_orig is empty */
memset(check_orig, 0, NAME_LEN);
if (!compare_name(loop_orig, check_orig))
printf("of originator: %s ",
get_name_by_macstr(loop_orig, read_opt));
if ((seqno_min == -1) && (seqno_max == -1))
printf("[all sequence numbers]");
else if (seqno_min == seqno_max)
printf("[sequence number: %lli]", seqno_min);
else
printf("[sequence number range: %lli-%lli]", seqno_min, seqno_max);
if (!compare_name(filter_orig, check_orig))
printf(" [filter originator: %s]",
get_name_by_macstr(filter_orig, read_opt));
printf("\n");
while (NULL != (hashit = hash_iterate(node_hash, hashit))) {
bat_node = hashit->bucket->data;
if (!compare_name(loop_orig, check_orig) &&
!compare_name(loop_orig, bat_node->name))
continue;
printf("\nChecking host: %s\n",
get_name_by_macstr(bat_node->name, read_opt));
list_for_each_entry(orig_event, &bat_node->orig_event_list, list) {
if (bat_node == orig_event->orig_node)
continue;
if (!compare_name(filter_orig, check_orig) &&
!compare_name(filter_orig, orig_event->orig_node->name))
continue;
/* we might have no log file from this node */
if (list_empty(&orig_event->event_list)) {
fprintf(stderr, "No seqno data of originator '%s' - skipping\n",
get_name_by_macstr(orig_event->orig_node->name, read_opt));
continue;
}
/* or routing tables */
if (list_empty(&orig_event->rt_hist_list)) {
fprintf(stderr, "No routing history of originator '%s' - skipping\n",
get_name_by_macstr(orig_event->orig_node->name, read_opt));
continue;
}
list_for_each_entry(rt_hist, &orig_event->rt_hist_list, list) {
/* special seqno that indicates an originator timeout */
if (rt_hist->seqno_event->seqno == -1)
continue;
if ((seqno_min != -1) && (rt_hist->seqno_event->seqno < seqno_min))
continue;
if ((seqno_max != -1) && (rt_hist->seqno_event->seqno > seqno_max))
continue;
/**
* sometime we change the routing table more than once
* with the same seqno
*/
if (last_seqno == rt_hist->seqno_event->seqno)
seqno_count++;
else
seqno_count = 0;
last_seqno = rt_hist->seqno_event->seqno;
if (rt_hist->flags == RT_FLAG_DELETE) {
printf("Path towards %s deleted (originator timeout)\n",
get_name_by_macstr(rt_hist->seqno_event->orig->name, read_opt));
continue;
}
prev_rt_hist = rt_hist->prev_rt_hist;
if ((prev_rt_hist) &&
(rt_hist->seqno_event->seqno != prev_rt_hist->seqno_event->seqno)) {
if (rt_hist->seqno_event->seqno < prev_rt_hist->seqno_event->seqno) {
fprintf(stderr,
"Smaller seqno (%lli) than previously received seqno (%lli) of orig %s triggered routing table change - skipping recursive check\n",
rt_hist->seqno_event->seqno, prev_rt_hist->seqno_event->seqno,
get_name_by_macstr(rt_hist->seqno_event->orig->name, read_opt));
goto validate_path;
}
if (rt_hist->seqno_event->seqno == prev_rt_hist->seqno_event->seqno + 1)
goto validate_path;
/* printf("\n=> checking orig %s in seqno range of: %i - %i ",
get_name_by_macstr(rt_hist->seqno_event->orig->name, read_opt),
prev_rt_hist->seqno_event->seqno + 1,
rt_hist->seqno_event->seqno);
printf("(prev nexthop: %s)\n",
get_name_by_macstr(prev_rt_hist->next_hop->name, read_opt)); */
res = find_rt_table_change(bat_node, rt_hist->seqno_event->orig,
prev_rt_hist->next_hop,
prev_rt_hist->seqno_event->seqno + 1,
rt_hist->seqno_event->seqno,
seqno_count, read_opt);
if (res != -2)
continue;
}
validate_path:
print_rt_path_at_seqno(bat_node, rt_hist->seqno_event->orig, rt_hist->next_hop,
rt_hist->seqno_event->seqno, seqno_count, read_opt);
}
}
}
}
static void seqno_trace_print_neigh(struct seqno_trace_neigh *seqno_trace_neigh,
struct seqno_event *seqno_event_parent,
int num_sisters, char *head, int read_opt)
{
char new_head[MAX_LINE];
int i;
printf("%s%s- %s [tq: %i, ttl: %i", head,
(strlen(head) == 1 ? "" : num_sisters == 0 ? "\\" : "|"),
get_name_by_macstr(seqno_trace_neigh->bat_node->name, read_opt),
seqno_trace_neigh->seqno_event->tq,
seqno_trace_neigh->seqno_event->ttl);
printf(", neigh: %s", get_name_by_macstr(seqno_trace_neigh->seqno_event->neigh->name, read_opt));
printf(", prev_sender: %s]", get_name_by_macstr(seqno_trace_neigh->seqno_event->prev_sender->name, read_opt));
if ((seqno_event_parent) &&
(seqno_trace_neigh->seqno_event->tq > seqno_event_parent->tq))
printf(" TQ UP!\n");
else
printf("\n");
for (i = 0; i < seqno_trace_neigh->num_neighbors; i++) {
snprintf(new_head, sizeof(new_head), "%s%s",
(strlen(head) > 1 ? head : num_sisters == 0 ? " " : head),
(strlen(head) == 1 ? " " :
num_sisters == 0 ? " " : "| "));
seqno_trace_print_neigh(seqno_trace_neigh->seqno_trace_neigh[i], seqno_trace_neigh->seqno_event,
seqno_trace_neigh->num_neighbors - i - 1, new_head, read_opt);
}
}
static void seqno_trace_print(struct list_head_first *trace_list, char *trace_orig,
long long seqno_min, long long seqno_max, char *filter_orig, int read_opt)
{
struct seqno_trace *seqno_trace;
char head[MAX_LINE], check_orig[NAME_LEN];
int i;
/* if no option was given filter_orig is empty */
memset(check_orig, 0, NAME_LEN);
printf("Sequence number flow of originator: %s ",
get_name_by_macstr(trace_orig, read_opt));