Code cleanup of acl.c

Reported by dimas
Closes issue #10784


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@86278 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/acl.c

@@ -123,64 +123,71 @@ struct ast_ha *ast_duplicate_ha_list(struct ast_ha *original)
 struct ast_ha *ast_append_ha(char *sense, char *stuff, struct ast_ha *path, int *error)
 {
 	struct ast_ha *ha;
-	char *nm = "255.255.255.255";
-	char tmp[256];
+	char *nm;
 	struct ast_ha *prev = NULL;
 	struct ast_ha *ret;
-	int x, z;
-	unsigned int y;
+	int x;
+	char *tmp = strdupa(stuff);
 
 	ret = path;
 	while (path) {
 		prev = path;
 		path = path->next;
 	}
-	if ((ha = ast_malloc(sizeof(*ha)))) {
-		ast_copy_string(tmp, stuff, sizeof(tmp));
-		nm = strchr(tmp, '/');
-		if (!nm) {
-			nm = "255.255.255.255";
-		} else {
-			*nm = '\0';
-			nm++;
-		}
+
+	ha = ast_malloc(sizeof(*ha));
+	if (!ha)
+		return ret;
+
+	nm = strchr(tmp, '/');
+	if (!nm) {
+		/* assume /32. Yes, htonl does not do anything for this particular mask
+		   but we better use it to show we remember about byte order */
+		ha->netmask.s_addr = htonl(0xFFFFFFFF);
+	} else {
+		*nm = '\0';
+		nm++;
+
 		if (!strchr(nm, '.')) {
-			if ((sscanf(nm, "%d", &x) == 1) && (x >= 0) && (x <= 32)) {
-				y = 0;
-				for (z = 0; z < x; z++) {
-					y >>= 1;
-					y |= 0x80000000;
-				}
-				ha->netmask.s_addr = htonl(y);
+			if ((sscanf(nm, "%d", &x) == 1) && (x >= 0) && (x <= 32))
+				ha->netmask.s_addr = htonl(0xFFFFFFFF << (32 - x));
+			else {
+				ast_log(LOG_WARNING, "Invalid CIDR in %s\n", stuff);
+				ast_free(ha);
+				if (error)
+					*error = 1;
+				return ret;
 			}
 		} else if (!inet_aton(nm, &ha->netmask)) {
-			ast_log(LOG_WARNING, "%s is not a valid netmask\n", nm);
-			if (error)
-				*error = 1;
+			ast_log(LOG_WARNING, "Invalid mask in %s\n", stuff);
 			ast_free(ha);
-			return ret;
-		}
-		if (!inet_aton(tmp, &ha->netaddr)) {
-			ast_log(LOG_WARNING, "%s is not a valid IP\n", tmp);
 			if (error)
 				*error = 1;
-			ast_free(ha);
 			return ret;
 		}
-		ha->netaddr.s_addr &= ha->netmask.s_addr;
-		if (!strncasecmp(sense, "p", 1)) {
-			ha->sense = AST_SENSE_ALLOW;
-		} else {
-			ha->sense = AST_SENSE_DENY;
-		}
-		ha->next = NULL;
-		if (prev) {
-			prev->next = ha;
-		} else {
-			ret = ha;
-		}
 	}
-	ast_debug(1, "%s/%s appended to acl for peer\n", stuff, nm);
+
+	if (!inet_aton(tmp, &ha->netaddr)) {
+		ast_log(LOG_WARNING, "Invalid IP address in %s\n", stuff);
+		ast_free(ha);
+		if (error)
+			*error = 1;
+		return ret;
+	}
+
+	ha->netaddr.s_addr &= ha->netmask.s_addr;
+
+	ha->sense = strncasecmp(sense, "p", 1) ? AST_SENSE_DENY : AST_SENSE_ALLOW;
+
+	ha->next = NULL;
+	if (prev) {
+		prev->next = ha;
+	} else {
+		ret = ha;
+	}
+
+	ast_debug(1, "%s/%s sense %d appended to acl for peer\n", ast_strdupa(ast_inet_ntoa(ha->netaddr)), ast_strdupa(ast_inet_ntoa(ha->netmask)), ha->sense);
+
 	return ret;
 }