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Change parser to handle numbers as unsigned

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Lexer always parsed numbers as unsigned, but parser handled them as
signed and grammar contained many unnecessary checks for negativity.
This commit is contained in:
Ondrej Zajicek (work) 2017-05-23 17:22:53 +02:00
parent 0705a1c565
commit 6aaaa63519
7 changed files with 32 additions and 34 deletions
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20
conf/confbase.Y
View file

@ -27,16 +27,16 @@ CF_HDR
CF_DEFINES
static void
check_u16(unsigned val)
check_u16(uint val)
{
if (val > 0xFFFF)
cf_error("Value %d out of range (0-65535)", val);
cf_error("Value %u out of range (0-65535)", val);
}
CF_DECLS
%union {
int i;
uint i;
u32 i32;
u64 i64;
ip_addr a;
@ -175,7 +175,7 @@ ipa_scope:
pxlen4:
'/' NUM {
if ($2 < 0 || $2 > IP4_MAX_PREFIX_LENGTH) cf_error("Invalid prefix length %d", $2);
if ($2 > IP4_MAX_PREFIX_LENGTH) cf_error("Invalid prefix length %u", $2);
$$ = $2;
}
| ':' IP4 {
@ -196,8 +196,8 @@ net_ip4_: IP4 pxlen4
net_ip6_: IP6 '/' NUM
{
if ($3 < 0 || $3 > IP6_MAX_PREFIX_LENGTH)
cf_error("Invalid prefix length %d", $3);
if ($3 > IP6_MAX_PREFIX_LENGTH)
cf_error("Invalid prefix length %u", $3);
net_fill_ip6(&($$), $1, $3);
@ -223,16 +223,16 @@ net_roa4_: net_ip4_ MAX NUM AS NUM
{
$$ = cfg_alloc(sizeof(net_addr_roa4));
net_fill_roa4($$, net4_prefix(&$1), net4_pxlen(&$1), $3, $5);
if ($3 < (int) net4_pxlen(&$1) || $3 > IP4_MAX_PREFIX_LENGTH)
cf_error("Invalid max prefix length %d", $3);
if ($3 < net4_pxlen(&$1) || $3 > IP4_MAX_PREFIX_LENGTH)
cf_error("Invalid max prefix length %u", $3);
};
net_roa6_: net_ip6_ MAX NUM AS NUM
{
$$ = cfg_alloc(sizeof(net_addr_roa6));
net_fill_roa6($$, net6_prefix(&$1), net6_pxlen(&$1), $3, $5);
if ($3 < (int) net6_pxlen(&$1) || $3 > IP6_MAX_PREFIX_LENGTH)
cf_error("Invalid max prefix length %d", $3);
if ($3 < net6_pxlen(&$1) || $3 > IP6_MAX_PREFIX_LENGTH)
cf_error("Invalid max prefix length %u", $3);
};
net_ip_: net_ip4_ | net_ip6_ ;

4
filter/config.Y
View file

@ -728,8 +728,8 @@ fprefix:
| net_ip_ '-' { $$.net = $1; $$.lo = 0; $$.hi = $1.pxlen; }
| net_ip_ '{' NUM ',' NUM '}' {
$$.net = $1; $$.lo = $3; $$.hi = $5;
if ((0 > $3) || ($3 > $5) || ($5 > net_max_prefix_length[$1.type]))
cf_error("Invalid prefix pattern range: {%d, %d}", $3, $5);
if (($3 > $5) || ($5 > net_max_prefix_length[$1.type]))
cf_error("Invalid prefix pattern range: {%u, %u}", $3, $5);
}
;

4
filter/filter.h
View file

@ -19,11 +19,11 @@ struct f_inst { /* Instruction */
u16 code; /* Instruction code, see the interpret() function and P() macro */
u16 aux; /* Extension to instruction code, T_*, EA_*, EAF_* */
union {
int i;
uint i;
void *p;
} a1; /* The first argument */
union {
int i;
uint i;
void *p;
} a2; /* The second argument */
int lineno;

4
nest/config.Y
View file

@ -349,8 +349,8 @@ iface_patt:
;
tos:
CLASS expr { $$ = $2 & 0xfc; if (($2 < 0) || ($2 > 255)) cf_error("TX class must be in range 0-255"); }
| DSCP expr { $$ = ($2 & 0x3f) << 2; if (($2 < 0) || ($2 > 63)) cf_error("TX DSCP must be in range 0-63"); }
CLASS expr { $$ = $2 & 0xfc; if ($2 > 255) cf_error("TX class must be in range 0-255"); }
| DSCP expr { $$ = ($2 & 0x3f) << 2; if ($2 > 63) cf_error("TX DSCP must be in range 0-63"); }
;
/* Direct device route protocol */

12
proto/ospf/config.Y
View file

@ -126,7 +126,7 @@ static inline void
ospf_check_defcost(int cost)
{
if ((cost <= 0) || (cost >= LSINFINITY))
cf_error("Default cost must be in range 1-%d", LSINFINITY-1);
cf_error("Default cost must be in range 1-%u", LSINFINITY-1);
}
static inline void
@ -185,10 +185,10 @@ ospf_proto_item:
| RFC1583COMPAT bool { OSPF_CFG->rfc1583 = $2; }
| STUB ROUTER bool { OSPF_CFG->stub_router = $3; }
| ECMP bool { OSPF_CFG->ecmp = $2 ? OSPF_DEFAULT_ECMP_LIMIT : 0; }
| ECMP bool LIMIT expr { OSPF_CFG->ecmp = $2 ? $4 : 0; if ($4 < 0) cf_error("ECMP limit cannot be negative"); }
| ECMP bool LIMIT expr { OSPF_CFG->ecmp = $2 ? $4 : 0; }
| MERGE EXTERNAL bool { OSPF_CFG->merge_external = $3; }
| TICK expr { OSPF_CFG->tick = $2; if($2<=0) cf_error("Tick must be greater than zero"); }
| INSTANCE ID expr { OSPF_CFG->instance_id = $3; if (($3<0) || ($3>255)) cf_error("Instance ID must be in range 0-255"); }
| TICK expr { OSPF_CFG->tick = $2; if($2 <= 0) cf_error("Tick must be greater than zero"); }
| INSTANCE ID expr { OSPF_CFG->instance_id = $3; if ($3 > 255) cf_error("Instance ID must be in range 0-255"); }
| ospf_area
;
@ -318,7 +318,7 @@ ospf_iface_item:
| REAL BROADCAST bool { OSPF_PATT->real_bcast = $3; if (!ospf_cfg_is_v2()) cf_error("Real broadcast option requires OSPFv2"); }
| PTP NETMASK bool { OSPF_PATT->ptp_netmask = $3; if (!ospf_cfg_is_v2()) cf_error("PtP netmask option requires OSPFv2"); }
| TRANSMIT DELAY expr { OSPF_PATT->inftransdelay = $3 ; if (($3<=0) || ($3>65535)) cf_error("Transmit delay must be in range 1-65535"); }
| PRIORITY expr { OSPF_PATT->priority = $2 ; if (($2<0) || ($2>255)) cf_error("Priority must be in range 0-255"); }
| PRIORITY expr { OSPF_PATT->priority = $2 ; if ($2>255) cf_error("Priority must be in range 0-255"); }
| STRICT NONBROADCAST bool { OSPF_PATT->strictnbma = $3 ; }
| STUB bool { OSPF_PATT->stub = $2 ; }
| CHECK LINK bool { OSPF_PATT->check_link = $3; }
@ -404,7 +404,7 @@ ospf_iface_start:
ospf_instance_id:
/* empty */
| INSTANCE expr { OSPF_PATT->instance_id = $2; if (($2<0) || ($2>255)) cf_error("Instance ID must be in range 0-255"); }
| INSTANCE expr { OSPF_PATT->instance_id = $2; if ($2 > 255) cf_error("Instance ID must be in range 0-255"); }
;
ospf_iface_patt_list:

20
proto/radv/config.Y
View file

@ -91,14 +91,14 @@ radv_iface_item:
| MIN DELAY expr { RADV_IFACE->min_delay = $3; if ($3 <= 0) cf_error("Min delay must be positive"); }
| MANAGED bool { RADV_IFACE->managed = $2; }
| OTHER CONFIG bool { RADV_IFACE->other_config = $3; }
| LINK MTU expr { RADV_IFACE->link_mtu = $3; if ($3 < 0) cf_error("Link MTU must be 0 or positive"); }
| REACHABLE TIME expr { RADV_IFACE->reachable_time = $3; if (($3 < 0) || ($3 > 3600000)) cf_error("Reachable time must be in range 0-3600000"); }
| RETRANS TIMER expr { RADV_IFACE->retrans_timer = $3; if ($3 < 0) cf_error("Retrans timer must be 0 or positive"); }
| CURRENT HOP LIMIT expr { RADV_IFACE->current_hop_limit = $4; if (($4 < 0) || ($4 > 255)) cf_error("Current hop limit must be in range 0-255"); }
| LINK MTU expr { RADV_IFACE->link_mtu = $3; }
| REACHABLE TIME expr { RADV_IFACE->reachable_time = $3; if ($3 > 3600000) cf_error("Reachable time must be in range 0-3600000"); }
| RETRANS TIMER expr { RADV_IFACE->retrans_timer = $3; }
| CURRENT HOP LIMIT expr { RADV_IFACE->current_hop_limit = $4; if ($4 > 255) cf_error("Current hop limit must be in range 0-255"); }
| DEFAULT LIFETIME expr radv_sensitive {
RADV_IFACE->default_lifetime = $3;
if (($3 < 0) || ($3 > 9000)) cf_error("Default lifetime must be in range 0-9000");
if ($4 != -1) RADV_IFACE->default_lifetime_sensitive = $4;
if ($3 > 9000) cf_error("Default lifetime must be in range 0-9000");
if ($4 != (uint) -1) RADV_IFACE->default_lifetime_sensitive = $4;
}
| DEFAULT PREFERENCE radv_preference { RADV_IFACE->default_preference = $3; }
| PREFIX radv_prefix { add_tail(&RADV_IFACE->pref_list, NODE this_radv_prefix); }
@ -125,7 +125,7 @@ radv_iface_finish:
if ((ic->min_ra_int > 3) &&
(ic->min_ra_int > (ic->max_ra_int * 3 / 4)))
cf_error("Min RA interval must be at most 3/4 * Max RA interval %d %d", ic->min_ra_int, ic->max_ra_int);
cf_error("Min RA interval must be at most 3/4 * Max RA interval");
if ((ic->default_lifetime > 0) && (ic->default_lifetime < ic->max_ra_int))
cf_error("Default lifetime must be either 0 or at least Max RA interval");
@ -163,13 +163,11 @@ radv_prefix_item:
| AUTONOMOUS bool { RADV_PREFIX->autonomous = $2; }
| VALID LIFETIME expr radv_sensitive {
RADV_PREFIX->valid_lifetime = $3;
if ($3 < 0) cf_error("Valid lifetime must be 0 or positive");
if ($4 != -1) RADV_PREFIX->valid_lifetime_sensitive = $4;
if ($4 != (uint) -1) RADV_PREFIX->valid_lifetime_sensitive = $4;
}
| PREFERRED LIFETIME expr radv_sensitive {
RADV_PREFIX->preferred_lifetime = $3;
if ($3 < 0) cf_error("Preferred lifetime must be 0 or positive");
if ($4 != -1) RADV_PREFIX->preferred_lifetime_sensitive = $4;
if ($4 != (uint) -1) RADV_PREFIX->preferred_lifetime_sensitive = $4;
}
;

2
proto/rip/config.Y
View file

@ -65,7 +65,7 @@ rip_proto_item:
proto_item
| proto_channel
| ECMP bool { RIP_CFG->ecmp = $2 ? RIP_DEFAULT_ECMP_LIMIT : 0; }
| ECMP bool LIMIT expr { RIP_CFG->ecmp = $2 ? $4 : 0; if ($4 < 0) cf_error("ECMP limit cannot be negative"); }
| ECMP bool LIMIT expr { RIP_CFG->ecmp = $2 ? $4 : 0; }
| INFINITY expr { RIP_CFG->infinity = $2; }
| INTERFACE rip_iface
;