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DNS: added compile-time check for some defines to fit into an u8_t (bug #49658)

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This commit is contained in:
goldsimon 2016-12-07 09:09:45 +01:00
parent e00a131160
commit c87855423c
1 changed files with 15 additions and 0 deletions
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15
src/core/dns.c
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@ -116,6 +116,13 @@ static u16_t dns_txid;
#error DNS_MAX_TTL must be a positive 32-bit value
#endif
#if DNS_TABLE_SIZE > 255
#error DNS_TABLE_SIZE must fit into an u8_t
#endif
#if DNS_MAX_SERVERS > 255
#error DNS_MAX_SERVERS must fit into an u8_t
#endif
/* The number of parallel requests (i.e. calls to dns_gethostbyname
* that cannot be answered from the DNS table.
* This is set to the table size by default.
@ -123,6 +130,10 @@ static u16_t dns_txid;
#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_NO_MULTIPLE_OUTSTANDING) != 0)
#ifndef DNS_MAX_REQUESTS
#define DNS_MAX_REQUESTS DNS_TABLE_SIZE
#else
#if DNS_MAX_REQUESTS > 255
#error DNS_MAX_REQUESTS must fit into an u8_t
#endif
#endif
#else
/* In this configuration, both arrays have to have the same size and are used
@ -134,6 +145,10 @@ static u16_t dns_txid;
#if ((LWIP_DNS_SECURE & LWIP_DNS_SECURE_RAND_SRC_PORT) != 0)
#ifndef DNS_MAX_SOURCE_PORTS
#define DNS_MAX_SOURCE_PORTS DNS_MAX_REQUESTS
#else
#if DNS_MAX_SOURCE_PORTS > 255
#error DNS_MAX_SOURCE_PORTS must fit into an u8_t
#endif
#endif
#else
#ifdef DNS_MAX_SOURCE_PORTS