Error: CLANG_WARNING: [#def30]
dnsmasq-2.86test7/src/dbus.c:117:3: warning[deadcode.DeadStores]: Value stored to 'w' is never read
# 115| daemon->watches = w;
# 116|
# 117|-> w = data; /* no warning */
# 118| return TRUE;
# 119| }
Error: CLANG_WARNING: [#def31]
dnsmasq-2.86test7/src/dbus.c:137:3: warning[deadcode.DeadStores]: Value stored to 'w' is never read
# 135| }
# 136|
# 137|-> w = data; /* no warning */
# 138| }
# 139|
Error: CHECKED_RETURN (CWE-252): [#def32]
dnsmasq-2.86test7/src/dbus.c:146: check_return: Calling "dbus_message_iter_init" without checking return value (as is done elsewhere 4 out of 5 times).
dnsmasq-2.86test7/src/dbus.c:460: example_checked: Example 1: "dbus_message_iter_init(message, &iter)" has its value checked in "dbus_message_iter_init(message, &iter)".
dnsmasq-2.86test7/src/dbus.c:573: example_checked: Example 2: "dbus_message_iter_init(message, &iter)" has its value checked in "dbus_message_iter_init(message, &iter)".
dnsmasq-2.86test7/src/dbus.c:257: example_checked: Example 3: "dbus_message_iter_init(message, &iter)" has its value checked in "dbus_message_iter_init(message, &iter)".
dnsmasq-2.86test7/src/dbus.c:427: example_checked: Example 4: "dbus_message_iter_init(message, &iter)" has its value checked in "dbus_message_iter_init(message, &iter)".
# 144| char *domain;
# 145|
# 146|-> dbus_message_iter_init(message, &iter);
# 147|
# 148| mark_servers(SERV_FROM_DBUS);
Error: NEGATIVE_RETURNS (CWE-394): [#def33]
dnsmasq-2.86test7/src/dbus.c:547: negative_return_fn: Function "parse_hex((char *)hwaddr, dhcp_chaddr, 16, NULL, &hw_type)" returns a negative number.
dnsmasq-2.86test7/src/dbus.c:547: assign: Assigning: "hw_len" = "parse_hex((char *)hwaddr, dhcp_chaddr, 16, NULL, &hw_type)".
dnsmasq-2.86test7/src/dbus.c:551: negative_returns: "hw_len" is passed to a parameter that cannot be negative.
# 549| hw_type = ARPHRD_ETHER;
# 550|
# 551|-> lease_set_hwaddr(lease, dhcp_chaddr, clid, hw_len, hw_type,
# 552| clid_len, now, 0);
# 553| lease_set_expires(lease, expires, now);
Error: CLANG_WARNING: [#def34]
dnsmasq-2.86test7/src/dbus.c:722:3: warning[deadcode.DeadStores]: Value stored to 'method' is never read
# 720| clear_cache_and_reload(dnsmasq_time());
# 721|
# 722|-> method = user_data; /* no warning */
# 723|
# 724| /* If no reply or no error, return nothing */
This should be largely transparent, but it drastically
improves performance and reduces memory foot-print when
configuring large numbers domains of the form
local=/adserver.com/
or
local=/adserver.com/#
Lookup times now grow as log-to-base-2 of the number of domains,
rather than greater than linearly, as before.
The change makes multiple addresses associated with a domain work
address=/example.com/1.2.3.4
address=/example.com/5.6.7.8
It also handles multiple upstream servers for a domain better; using
the same try/retry alogrithms as non domain-specific servers. This
also applies to DNSSEC-generated queries.
Finally, some of the oldest and gnarliest code in dnsmasq has had
a significant clean-up. It's far from perfect, but it _is_ better.
This was the source of a large number of #ifdefs, originally
included for use with old embedded libc versions. I'm
sure no-one wants or needs IPv6-free code these days, so this
is a move towards more maintainable code.
Petr Menšík