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Interrupção de conexão automática
A conexão TCP será automaticamente desconectada se não ocorrer comunicação
por 30 segundos depois de ser estabelecida.
O projector não aceita os comandos sem autenticar com sucesso quando activar
a função de autenticação. O projector usa uma autenticação de tipo de resposta
desafiadora com um algorítmo MD5 (5 resumos de mensagem).
Quando o projector usar uma LAN 8 bites aleatórios será devolvidos se activar
autenticação. Ligue estes 8 bites recebidos e a palavra-chave de autenticação e
o faça um resumo destes dados com o algorítmo MD5 e adicione-o na frente dos
comandos para enviar.
A seguir apresentamos um exemplo se a palavra-chave de autenticação é
definida para “password” e os 8 bites aleatórios são “a572f60c”.
Autenticação
1) Ligue o projector.
2) Receba os 8 bites aleatórios “a572f60c” do projector.
3) Liga 8 bites aleatórios “a572f60c” e palavra-chave de autenticação “password”
e torna-se “a572f60cpassword”.
4) Faça um resumo desta ligação “a572f60cpassword” com o algorítmo MD5.
Será “e3d97429adffa11bce1f7275813d4bde”.
5) Adicione este “e3d97429adffa11bce1f7275813d4bde” na frente de comandos
e envie os dados.
Envie “e3d97429adffa11bce1f7275813d4bde”+comando.
6) Quando enviar os dados estiver correcto o comando será executador e
dados de resposta serão devolvidos. Caso contrário, um erro de autenticação
será devolvido.
• Quanto a transmissão do segundo comando e dos comandos
subsequentes, os dados de autenticação podem ser omitidos quando a mesma
conexão.
NOTA
7.4 Controlo de comando através da rede (continuação)
7. Outras funções
198


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