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/*
* netsniff-ng - the packet sniffing beast
* Copyright 2009 - 2013 Daniel Borkmann.
* Subject to the GPL, version 2.
*/
#include <stdint.h>
#include <stdbool.h>
#include "hash.h"
#include "xmalloc.h"
#include "oui.h"
#include "str.h"
static struct hash_table oui;
static bool initialized = false;
struct vendor_id {
unsigned int id;
char *vendor;
struct vendor_id *next;
};
const char *lookup_vendor(unsigned int id)
{
struct vendor_id *v;
v = lookup_hash(id, &oui);
while (v && id != v->id)
v = v->next;
return (v && id == v->id ? v->vendor : NULL);
}
void dissector_init_oui(void)
{
FILE *fp;
char buff[128], *ptr, *end;
struct vendor_id *v;
void **pos;
if (initialized)
return;
fp = fopen(PREFIX_STRING "/etc/netsniff-ng/oui.conf", "r");
if (!fp)
panic("No oui.conf found!\n");
memset(buff, 0, sizeof(buff));
while (fgets(buff, sizeof(buff), fp) != NULL) {
buff[sizeof(buff) - 1] = 0;
ptr = buff;
v = xmalloc(sizeof(*v));
v->id = strtol(ptr, &end, 0);
/* not a valid line, skip */
if (v->id == 0 && end == ptr)
continue;
ptr = strstr(buff, ", ");
/* likewise */
if (!ptr)
continue;
ptr += strlen(", ");
ptr = strtrim_right(ptr, '\n');
ptr = strtrim_right(ptr, ' ');
v->vendor = xstrdup(ptr);
v->next = NULL;
pos = insert_hash(v->id, v, &oui);
if (pos) {
v->next = *pos;
*pos = v;
}
memset(buff, 0, sizeof(buff));
}
fclose(fp);
initialized = true;
}
static int dissector_cleanup_oui_hash(void *ptr)
{
struct vendor_id *tmp, *v = ptr;
if (!ptr)
return 0;
while ((tmp = v->next)) {
xfree(v->vendor);
xfree(v);
v = tmp;
}
xfree(v->vendor);
xfree(v);
return 0;
}
void dissector_cleanup_oui(void)
{
for_each_hash(&oui, dissector_cleanup_oui_hash);
free_hash(&oui);
initialized = false;
}
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