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Randomize source ports for all outgoing connections. Fix for CERT VU#210620.

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This commit is contained in:
Adam Dunkels 2014-12-02 11:07:05 +01:00
parent d3d33c5699
commit ad744c6218
1 changed files with 4 additions and 4 deletions
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8
core/net/ip64/ip64-addrmap.c
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@ -35,6 +35,8 @@
#include "ip64-conf.h" #include "ip64-conf.h"
#include "lib/random.h"
#include <string.h> #include <string.h>
#ifdef IP64_ADDRMAP_CONF_ENTRIES #ifdef IP64_ADDRMAP_CONF_ENTRIES
@ -173,10 +175,8 @@ ip64_addrmap_lookup_port(uint16_t mapped_port, uint8_t protocol)
static void static void
increase_mapped_port(void) increase_mapped_port(void)
{ {
mapped_port++; mapped_port = (random_rand() % (LAST_MAPPED_PORT - FIRST_MAPPED_PORT)) +
if(mapped_port >= LAST_MAPPED_PORT) { FIRST_MAPPED_PORT;
mapped_port = FIRST_MAPPED_PORT;
}
} }
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
struct ip64_addrmap_entry * struct ip64_addrmap_entry *