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ESP8266mDNS: support AP and STA interfaces at once

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Bind the UDP connection to IP_ADDR_ANY rather than a specific interface
IP, so that it can receive queries from all interfaces at once.

When processing a query, detect which interface it was received on, and
pass this information to the reply code. Set the IP multicast interface
before each transmission, so that we can route each packet to a
different interface if required. These changes enable the code to
respond correctly on both AP and STA interfaces at once. The original
code only worked correctly for the STA interface if both were enabled.

When advertizing all services, do it on both AP and STA interfaces if
they're both enabled.

Provide an API for the application to notify the MDNS code if the AP
configuration changes (enabled, disabled, IP changed). Ideally, the WiFi
core would provide an event callback for this purpose, as it does for
STA changes, but it does not appear to, so the application must provide
this information.
This commit is contained in:
Stephen Warren
2017-01-14 21:09:09 -07:00
committed by Ivan Grokhotkov
parent eb1ac103e4
commit a546d64e07
2 changed files with 40 additions and 38 deletions
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5
libraries/ESP8266mDNS/ESP8266mDNS.h
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@ -66,6 +66,8 @@ public:
bool begin(const char* hostName, IPAddress ip, uint32_t ttl=120){
return begin(hostName);
}
/* Application should call this whenever AP is configured/disabled */
void notifyAPChange();
void update();
void addService(char *service, char *proto, uint16_t port);
@ -118,12 +120,11 @@ private:
WiFiEventHandler _gotIPHandler;
uint32_t _getOurIp();
uint16_t _getServicePort(char *service, char *proto);
MDNSTxt * _getServiceTxt(char *name, char *proto);
uint16_t _getServiceTxtLen(char *name, char *proto);
void _parsePacket();
void _reply(uint8_t replyMask, char * service, char *proto, uint16_t port);
void _reply(uint8_t replyMask, char * service, char *proto, uint16_t port, uint32_t ip);
size_t advertiseServices(); // advertise all hosted services
MDNSAnswer* _getAnswerFromIdx(int idx);
int _getNumAnswers();