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Netlink: Fixed handling of undefined bitfields in filters

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The default value is obviously false everywhere so we just return zero
if nothing is found, instead of undef.
This commit is contained in:
Maria Matejka 2024-11-25 17:14:32 +01:00
parent 7491cdbd1d
commit 1dd21f6024
4 changed files with 9 additions and 2 deletions
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2
filter/f-inst.c
View File

@ -886,6 +886,8 @@
}]]);
}
}
else if (da->empty)
RESULT_VAL(da->empty(da));
else if ((empty = f_get_empty(da->type)).type != T_VOID)
RESULT_VAL(empty);
else

4
filter/test.conf
View File

@ -2301,9 +2301,9 @@ bool t;
krt_source = 17;
krt_metric = 19;
# krt_lock_mtu = false;
# if krt_lock_congctl then krt_lock_mtu = false;
# krt_lock_window = true;
# krt_lock_rtt = krt_lock_rttvar && krt_lock_sstresh || krt_lock_cwnd;
# krt_lock_rtt = krt_lock_rttvar && krt_lock_ssthresh || krt_lock_cwnd;
accept "ok I take that";
}

1
lib/route.h
View File

@ -278,6 +278,7 @@ struct ea_class {
void (*format)(const eattr *ea, byte *buf, uint size); \
void (*stored)(const eattr *ea); /* When stored into global hash */ \
void (*freed)(const eattr *ea); /* When released from global hash */ \
struct f_val (*empty)(const struct ea_class *); /* Return this instead of T_VOID as default value for filters */ \
EA_CLASS_INSIDE;
};

4
sysdep/linux/netlink.c
View File

@ -51,6 +51,8 @@ struct nl_parse_state
#define KRT_FEATURES_MAX 4
static void krt_bitfield_format(const eattr *e, byte *buf, uint buflen);
static struct f_val krt_bitfield_empty(const struct ea_class *cls UNUSED)
{ return (struct f_val) { .type = T_INT }; }
static struct ea_class
ea_krt_prefsrc = {
@ -71,11 +73,13 @@ static struct ea_class ea_krt_metrics[] = {
.name = "krt_lock",
.type = T_INT,
.format = krt_bitfield_format,
.empty = krt_bitfield_empty,
},
[RTAX_FEATURES] = {
.name = "krt_features",
.type = T_INT,
.format = krt_bitfield_format,
.empty = krt_bitfield_empty,
},
[RTAX_CC_ALGO] = {
.name = "krt_congctl",