Bug #1380 - Do not allow akill masks to end in @.

This can be used to cause the IRCd to SQUIT us by
adding invalid akills. The only known affected is
Charybdis.

Also fixed a crash caused by receiving a SQUIT for ourselves.

Changes

@@ -1,8 +1,8 @@
 Anope Version 1.8 - GIT
 -----------------------
-02/22  F Fixed several grammar errors in docs/ (patch provided by Simba) [  #00]
 12/31  F Fixed os_svsnick to allow changing the case of a users' nick    [#1369]
-
+02/22  F Fixed several grammar errors in docs/ (patch provided by Simba) [  #00]
+02/25  F Do not allow akill masks to end in @                            [#1380]
 
 Anope Version 1.8.7
 -----------------------

src/operserv.c

@@ -809,6 +809,14 @@ int add_akill(User * u, char *mask, const char *by, const time_t expires,
     *host = 0;
     host++;
 
+    if (!*host)
+    {
+    	if (u)
+		notice_lang(s_OperServ, u, BAD_USERHOST_MASK);
+	free(mask2);
+	return -1;
+    }
+
     entry = scalloc(sizeof(Akill), 1);
 
     if (!entry) {

src/protocol/charybdis.c

@@ -873,6 +873,9 @@ void charybdis_cmd_remove_akill(char *user, char *host)
 {
     Uid *ud;
 
+    if (!user || !*user || !host || !*host)
+        return;
+
     ud = find_uid(s_OperServ);
     send_cmd((UseTS6 ? (ud ? ud->uid : s_OperServ) : s_OperServ),
              "UNKLINE * %s %s", user, host);

src/servers.c

@@ -243,7 +243,7 @@ static void delete_server(Server * serv, const char *quitreason)
         serv->prev->next = serv->next;
     if (serv->next)
         serv->next->prev = serv->prev;
-    if (serv->uplink->links == serv)
+    if (serv->uplink && serv->uplink->links == serv)
         serv->uplink->links = serv->next;
 
     if (debug)

version.log

@@ -8,9 +8,10 @@ VERSION_MAJOR="1"
 VERSION_MINOR="8"
 VERSION_PATCH="8"
 VERSION_EXTRA="-git"
-VERSION_BUILD="3093"
+VERSION_BUILD="3094"
 
 # Changes since 1.8.7 Release
+#Revision 3094 - Bug #1380 - Do not allow akill masks to end in @
 #Revision 3093 - Fixed several grammar errors in docs/ (patch provided by Simba)
 #Revision 3092 - Updated Copyright to 2012
 #Revision 3091 - Bug #1369 - Fixed os_svsnick to allow changing the case of a users' nick