diff options
Diffstat (limited to 'sys/contrib/pf/net/pf_subr.c')
| -rw-r--r-- | sys/contrib/pf/net/pf_subr.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/sys/contrib/pf/net/pf_subr.c b/sys/contrib/pf/net/pf_subr.c index 1ac8b40..a722aef 100644 --- a/sys/contrib/pf/net/pf_subr.c +++ b/sys/contrib/pf/net/pf_subr.c @@ -116,22 +116,22 @@ __FBSDID("$FreeBSD$"); #define ISN_STATIC_INCREMENT 4096 #define ISN_RANDOM_INCREMENT (4096 - 1) -static u_char isn_secret[32]; -static int isn_last_reseed; -static u_int32_t isn_offset; -static MD5_CTX isn_ctx; +static u_char pf_isn_secret[32]; +static int pf_isn_last_reseed; +static u_int32_t pf_isn_offset; u_int32_t pf_new_isn(struct pf_state *s) { + MD5_CTX isn_ctx; u_int32_t md5_buffer[4]; u_int32_t new_isn; struct pf_state_host *src, *dst; /* Seed if this is the first use, reseed if requested. */ - if (isn_last_reseed == 0) { - read_random(&isn_secret, sizeof(isn_secret)); - isn_last_reseed = ticks; + if (pf_isn_last_reseed == 0) { + read_random(&pf_isn_secret, sizeof(pf_isn_secret)); + pf_isn_last_reseed = ticks; } if (s->direction == PF_IN) { @@ -160,11 +160,11 @@ pf_new_isn(struct pf_state *s) MD5Update(&isn_ctx, (u_char *) &src->addr, sizeof(struct in_addr)); } - MD5Update(&isn_ctx, (u_char *) &isn_secret, sizeof(isn_secret)); + MD5Update(&isn_ctx, (u_char *) &pf_isn_secret, sizeof(pf_isn_secret)); MD5Final((u_char *) &md5_buffer, &isn_ctx); new_isn = (tcp_seq) md5_buffer[0]; - isn_offset += ISN_STATIC_INCREMENT + + pf_isn_offset += ISN_STATIC_INCREMENT + (arc4random() & ISN_RANDOM_INCREMENT); - new_isn += isn_offset; + new_isn += pf_isn_offset; return (new_isn); } |
