philippelh/bitchx
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Improve the initial seeding of the randm() RNG. This is the RNG selected

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for $rand() when RANDOM_SOURCE is 1.


git-svn-id: svn://svn.code.sf.net/p/bitchx/code/trunk@359 13b04d17-f746-0410-82c6-800466cd88b0
This commit is contained in:
Kevin Easton
2013-08-17 15:10:17 +00:00
parent 641565d4eb
commit 2fea73808f
2 changed files with 18 additions and 12 deletions
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2
Changelog
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@@ -1,5 +1,7 @@
[Changes 1.2c01]
* Improve the initial seeding of the randm() fallback RNG. (caf)
* Strengthen the cookie generation algorithm for /detach. (caf)
* RANDOM_SOURCE now only affects the rand() scripting function. (caf)

18
source/ircaux.c
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@@ -3139,15 +3139,22 @@ static const long RAND_A = 16807L;
static const long RAND_M = 2147483647L;
static const long RAND_Q = 127773L;
static const int RAND_R = 2836L;
static u_long z = 0;
long t;
static unsigned long z = 0;
if (z == 0)
z = (u_long) getuid();
{
struct timeval tv;
get_time(&tv);
z = tv.tv_usec << 12;
z ^= (unsigned long)tv.tv_sec;
z ^= (unsigned long)getuid() << 16;
z ^= (unsigned long)getpid();
}
if (l == 0)
{
t = RAND_A * (z % RAND_Q) - RAND_R * (z / RAND_Q);
long t = RAND_A * (z % RAND_Q) - RAND_R * (z / RAND_Q);
if (t > 0)
z = t;
else
@@ -3156,9 +3163,6 @@ static u_long z = 0;
}
else
{
if (l < 0)
z = (u_long) getuid();
else
z = l;
return 0;
}