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mdns: Fixed the ip header TTL to be correctly set to 255

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Defined in https://tools.ietf.org/html/rfc6762#section-11: All Multicast DNS responses (including responses sent via unicast)
   SHOULD be sent with IP TTL set to 255


* Original commit: espressif/esp-idf@5cce919cbe
This commit is contained in:
David Cermak
2020-12-28 17:37:03 +01:00
committed by suren-gabrielyan-espressif
parent c3a5826d60
commit ab3fa69b8f
1 changed files with 1 additions and 1 deletions
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2
components/mdns/mdns_networking.c
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@ -38,7 +38,7 @@ static esp_err_t _udp_pcb_main_init(void)
_pcb_main = NULL; _pcb_main = NULL;
return ESP_ERR_INVALID_STATE; return ESP_ERR_INVALID_STATE;
} }
_pcb_main->mcast_ttl = 1; _pcb_main->mcast_ttl = 255;
_pcb_main->remote_port = MDNS_SERVICE_PORT; _pcb_main->remote_port = MDNS_SERVICE_PORT;
ip_addr_copy(_pcb_main->remote_ip, *(IP_ANY_TYPE)); ip_addr_copy(_pcb_main->remote_ip, *(IP_ANY_TYPE));
udp_recv(_pcb_main, &_udp_recv, _mdns_server); udp_recv(_pcb_main, &_udp_recv, _mdns_server);