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dns: add a comment about case insensitivity

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Simon Goldschmidt 2018-06-13 15:10:47 +02:00
parent a9d6ea5953
commit 47ebb2b267
1 changed files with 5 additions and 0 deletions
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5
src/core/dns.c
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@ -637,6 +637,11 @@ dns_lookup(const char *name, ip_addr_t *addr LWIP_DNS_ADDRTYPE_ARG(u8_t dns_addr
* entry (otherwise, answers might arrive late for hostname not on the list * entry (otherwise, answers might arrive late for hostname not on the list
* any more). * any more).
* *
* For now, this function compares case-insensitive to cope with all kinds of
* servers. This also means that "dns 0x20 bit encoding" must be checked
* externally, if we want to implement it.
* Currently, the request is sent exactly as passed in by he user request.
*
* @param query hostname (not encoded) from the dns_table * @param query hostname (not encoded) from the dns_table
* @param p pbuf containing the encoded hostname in the DNS response * @param p pbuf containing the encoded hostname in the DNS response
* @param start_offset offset into p where the name starts * @param start_offset offset into p where the name starts