From ddac76d3f528debac7ffea90b57902eef5d66f99 Mon Sep 17 00:00:00 2001
From: bfsc19 <bfsc19@inf.ufpr.br>
Date: Sun, 26 Feb 2023 05:10:05 -0300
Subject: [PATCH] bugs: tentando adicionar envio e recebimento de arquivos
---
headers/client.h | 110 +++++++++++++++++++++++++------------------
headers/server.h | 120 +++++++++++++++++++++++++++++++++++------------
saida.txt | Bin 0 -> 29362 bytes
teste | Bin 33352 -> 0 bytes
texto.txt | 37 +++++++++++++++
5 files changed, 192 insertions(+), 75 deletions(-)
create mode 100644 saida.txt
delete mode 100755 teste
create mode 100644 texto.txt
diff --git a/headers/client.h b/headers/client.h
index 0c81bf3..3523ef1 100644
--- a/headers/client.h
+++ b/headers/client.h
@@ -51,6 +51,7 @@ private:
bool verify_ack(frame *received, frame *sent);
frame *receive_ack(frame *f);
vector<frame *> create_frames(vector<char> data, int type);
+ vector<frame *> create_frames_midia(vector<char> data);
int send_frame_socket(frame *f);
int start_transmission();
int end_transmission();
@@ -62,7 +63,7 @@ public:
string userInput;
// ------- Construtores ------ //
- client(conexao *socketAddr) { socket = socketAddr; };
+ client(conexao *socketAddr) { socket = socketAddr; }
// ---------- Funcoes -------- //
void run();
@@ -145,6 +146,8 @@ int client::end_transmission() {
* @return int
*/
int client::send_frames(vector<frame *> frames) {
+ if (frames.empty()) { return 0; }
+
if (!start_transmission()) { return 0; }
// Envia um frame por vez
@@ -190,7 +193,16 @@ int client::send_message(vector<char> data, int type) {
int messageSize = data.size();
vector<frame *> frames;
- frames = create_frames(data, type);
+
+ switch (type) {
+ case TEXTO:
+ frames = create_frames(data, type);
+ break;
+
+ case MIDIA:
+ frames = create_frames_midia(data);
+ break;
+ }
return send_frames(frames);
}
@@ -207,15 +219,12 @@ string client::calc_file_size(string fileName) {
}
vector<char> client::read_file(string fileName) {
- fstream file;
+ ifstream file;
file.open(fileName, ios::binary);
- string teste;
vector<char> fileData;
- char c;
- while ((file.get(c), file.eof() == false)) {
- fileData.push_back(c);
- }
+ for (char c; (file.read(&c, 1), file.eof()) == false; fileData.push_back(c))
+ ;
file.close();
return fileData;
@@ -226,49 +235,23 @@ vector<char> client::read_file(string fileName) {
*
*/
void client::send_file() {
+ vector<char> fileNameVector;
string fileName;
+
do {
- cout << "Digite o nome do arquivo(maximo de " << TAM_DADOS - 4 << " char):\n";
+ cout << "Digite o nome do arquivo(maximo de " << TAM_DADOS
+ << " char):\n";
getline(cin, fileName);
- } while (fileName.size() > TAM_DADOS - 4);
+ } while (fileName.size() > TAM_DADOS);
- // Envia o primeiro frame com o tamanho do arquivo
- string fileSize = calc_file_size(fileName);
- if (fileSize.empty()) { return; }
+ fileNameVector.insert(fileNameVector.begin(), fileName.begin(),
+ fileName.end());
- cout << "Tamanho do arquivo: " << fileSize << "\n";
- cout << "Enviando tamanho do arquivo\n";
- if (!send_message(vector<char>(fileSize.begin(), fileSize.end()), MIDIA)) {
- cout << "Limite de timout, arquivo nao foi enviado\n";
+ if (!send_message(fileNameVector, MIDIA)) {
+ cout << "Falha ao enviar o arquivo\n";
return;
}
- // Envia o segundo frame com o nome do arquivo
- cout << "Enviando nome do arquivo\n";
- string name = "NAME";
- vector<char>fileNameVector(name.begin(), name.end());
- fileNameVector.insert(fileNameVector.end(), fileName.begin(), fileName.end());
-
- if (!send_message(fileNameVector, MIDIA))
- {
- cout << "Limite de timout, arquivo nao foi enviado\n";
- return;
- }
-
- cout << "Enviando arquivo\n";
- vector<char> file = read_file(fileName);
- if ( file.empty() )
- {
- cout << "Falha ao abrir o arquivo para leitura. Abortado\n";
- return;
- }
-
- if (!send_message(file, DADOS))
- {
- cout << "Limite de timout, arquivo nao foi enviado\n";
- return;
- }
-
cout << "Arquivo enviado com sucesso\n";
}
@@ -289,6 +272,43 @@ void client::send_text(string message) {
cout << "Mensagem enviada com sucesso\n";
}
+vector<frame *> client::create_frames_midia(vector<char> vectorName) {
+ vector<frame *> framesToSend;
+ vector<frame *> framesAux;
+
+ // Cria um vetor com o tamanho do arquivo
+ vector<char> vectorTam;
+ string fileName = string(vectorName.begin(), vectorName.end());
+ string fileSize = calc_file_size(fileName);
+ if (fileSize.empty()) { return vector<frame *>(); }
+ vectorTam.insert(vectorTam.begin(), fileSize.begin(), fileSize.end());
+
+ // Adiciona o tamanho no primeiro frame a ser enviado
+ framesAux = create_frames(vectorTam, MIDIA);
+ framesToSend.insert(framesToSend.end(), framesAux.begin(), framesAux.end());
+
+ // Adiciona o nome no segundo frame a ser enviado
+ framesAux = create_frames(vectorName, MIDIA);
+ framesToSend.insert(framesToSend.end(), framesAux.begin(), framesAux.end());
+
+ // Cria um vetor com os dados do arquivo
+ vector<char> vectorData = read_file(fileName);
+ if (vectorData.empty()) {
+ cout << "Falha ao abrir o arquivo para leitura\n";
+ return vector<frame *>();
+ }
+
+ // Adiciona os dados do arquivo
+ framesAux = create_frames(vectorData, DADOS);
+ framesToSend.insert(framesToSend.end(), framesAux.begin(), framesAux.end());
+
+ // Arruma a sequencia dos frames
+ for (int i = 0; i < framesToSend.size(); i++)
+ framesToSend[i]->set_seq(i%16);
+
+ return framesToSend;
+}
+
/**
* @brief Creates a vector with all the frames to be sent
*
@@ -337,8 +357,8 @@ void client::print_help() {
cout << "Comandos disponiveis:\n";
cout << "help ou -h ou h ou HELP ou Help ou H ou ajuda ou Ajuda ou AJUDA\n";
cout << "exit ou -e ou e ou EXIT ou Exit ou E ou sair ou Sair ou SAIR\n";
- cout
- << "send ou -s ou s ou SEND ou Send ou S ou enviar ou Enviar ou ENVIAR\n";
+ cout << "send ou -s ou s ou SEND ou Send ou S ou enviar ou Enviar ou "
+ "ENVIAR\n";
cout << "para enviar uma mensagem, digite a mensagem e pressione enter\n";
}
diff --git a/headers/server.h b/headers/server.h
index 691cf5f..1316bea 100644
--- a/headers/server.h
+++ b/headers/server.h
@@ -52,6 +52,8 @@ private:
bool create_received_dir();
string receive_file_name();
int receive_file_data(string fileName);
+ bool verify_crc8(frame *f);
+ bool verify_seq(int seq, int lastSeq);
public:
// ------- Construtores ------ //
@@ -140,12 +142,33 @@ unsigned long server::chk_available_size() {
// Recebe o frame com o tamanho do arquivo
int server::receive_file_size(frame *f) {
- if ( !strncmp(f->get_dado(), "NAME", 4)) { return 0; }
+
+ /*
+ > verifica a sequencia do frame e o tipo
+ > se o frame nao for a sequencia esperada, envia um ack(0) e espera receber
+ a sequencia esperada > se o frame for o esperado, verifica o crc8 > se o
+ crc estiver certo, envia um ack e continua > se estiver errado, envia um
+ nack e espera receber o proximo frame
+ */
+ do {
+ while (f->get_seq() != 1 && f->get_tipo() != MIDIA) {
+ f->set_seq(0);
+ send_ack(f);
+ f = receive_frame_socket();
+ if (!f) { return 0; }
+ }
+
+ if (verify_crc8(f)) { break; }
+
+ // Se o ack nao estiver certo, espera receber o proximo frame
+ f = receive_frame_socket();
+ if (!f) { return 0; }
+ } while (true);
unsigned long availSize = chk_available_size();
if (availSize == -1) { return -1; }
- cout << "frame file size:" << f->get_dado() << "\n";
+ cout << "Frame file size:" << f->get_dado() << "\n";
int fileSize = stoi(f->get_dado());
if (fileSize > availSize * 0.9) {
@@ -179,32 +202,50 @@ bool server::create_received_dir() {
string server::receive_file_name() {
frame *fReceive;
- int lastSeq = -1;
// Aguarda receber um frame do tipo midia com o nome do arquivo
+ // E com a sequencia de numero 2
+ /*
+ > recebe o frame e verifica se o tipo e a sequencia estao corretos
+ > se estiverem, verifica o crc8
+ > se estiver correto, envia um ack e continua
+ > se estiver errado, envia um nack e espera receber o proximo frame
+ */
do {
- if (!receive_valid_frame(&fReceive)) { return string {}; }
- if (fReceive->get_tipo() != MIDIA) { continue; }
- if (strncmp(fReceive->get_dado(), "NAME", 4)) { continue; }
+ do {
+ fReceive = receive_frame_socket();
+ if (!fReceive) { return string{}; }
+
+ if (fReceive->get_tipo() != MIDIA) { continue; }
+ fReceive->set_seq(1);
+ send_ack(fReceive);
+
+ } while (fReceive->get_seq() != 2);
+ if (verify_crc8(fReceive)) { break; }
- if (fReceive->get_seq() == lastSeq) { continue; }
- lastSeq = fReceive->get_seq();
+ fReceive = receive_frame_socket();
+ if (!fReceive) { return string{}; }
- } while (fReceive->get_tipo() != FIMT);
+ } while (true);
-
cout << "Nome do arquivo recebido com sucesso\n";
- cout << "Nome do arquivo: " << fReceive->get_dado()+4 << "\n";
+ cout << "Nome do arquivo: " << fReceive->get_dado() << "\n";
- return string(fReceive->get_dado()+4);
+ return string(fReceive->get_dado());
}
-int server::receive_file_data(string fileName) {
+bool server::verify_seq(int seq, int lastSeq) {
+ if (lastSeq == 15 && seq != 0) { return false; }
+ if (seq != lastSeq + 1) { return false; }
+ return true;
+}
+int server::receive_file_data(string fileName) {
+ cout << "\tRecebendo dados arquivo\n";
// Abre o arquivo para escrita
ofstream file;
- file.open(FILE_DESTINATION+"/"+fileName);
+ file.open(fileName, ios::binary);
if (!file.is_open()) {
cout << "Falha ao criar o arquivo. Abortado\n";
return 0;
@@ -212,30 +253,45 @@ int server::receive_file_data(string fileName) {
cout << "Arquivo criado com sucesso\n";
- int lastSeq = -1;
+ int lastSeq = 2;
frame *f;
do {
- if (!receive_valid_frame(&f)) { return 0; }
- if (f->get_tipo() != DADOS) { continue; }
- if (f->get_seq() == lastSeq) { continue; }
+ // Fica tentando receber um frame
+ f = receive_frame_socket();
+ if (f == NULL) { return 0; }
+
+ if (f->get_tipo() == FIMT) { break; }
+
+ if (f->get_tipo() != DADOS) { continue; }
+
+ // Recebeu um frame com uma sequencia errada
+ if (!verify_seq(f->get_seq(), lastSeq)) {
+ f->set_seq(lastSeq);
+ send_ack(f);
+ continue;
+ }
+
+ if (!verify_crc8(f)) { continue; }
lastSeq = f->get_seq();
file.write(f->get_dado(), f->get_tam());
- } while (f->get_tipo() != FIMT);
+
+ } while (true);
cout << "Arquivo recebido com sucesso\n";
+
file.close();
return 1;
}
void server::receive_midia(frame *f) {
if (!create_received_dir()) { return; }
- if (!receive_file_size(f)) { return; }
+ if (!receive_file_size(f)) { return; }
string fileName = receive_file_name();
- if (fileName.size() == 0) { return; }
+ if (fileName.size() == 0) { return; }
receive_file_data(fileName);
}
@@ -258,23 +314,27 @@ frame *server::receive_frame_socket() {
return fReceive;
}
+bool server::verify_crc8(frame *f) {
+ int crc8 = f->chk_crc8();
+ if (!crc8) {
+ send_nack(f);
+ }
+ else
+ send_ack(f);
+ return crc8;
+}
+
int server::receive_valid_frame(frame **f) {
- int crc8;
do {
// Se nao conseguir receber o frame, mata a comunicacao
*f = receive_frame_socket();
if (*f == NULL) { return 0; }
+ cout << "Frame recebido loop\n";
+ (*f)->imprime(HEX);
// Avisa o cliente se nao conseguiu receber o frame
- crc8 = (*f)->chk_crc8();
- if (crc8) {
- send_ack(*f);
- break;
- }
- send_nack(*f);
- } while (!crc8);
-
+ } while (!verify_crc8(*f));
return 1;
}
diff --git a/saida.txt b/saida.txt
new file mode 100644
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GIT binary patch
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diff --git a/teste b/teste
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diff --git a/texto.txt b/texto.txt
new file mode 100644
index 0000000..4ae3093
--- /dev/null
+++ b/texto.txt
@@ -0,0 +1,37 @@
+
+
+ //string fileSize = calc_file_size(fileName);
+ //if (fileSize.empty()) { return; }
+ //franesFile.insert(framesFile.end(), fileSize.begin(), fileSize.end());
+
+ //cout << "Tamanho do arquivo: " << fileSize << "\n";
+ //cout << "Enviando tamanho do arquivo\n";
+ //if (!send_message(vector<char>(fileSize.begin(), fileSize.end()), MIDIA)) {
+ // cout << "Limite de timout, arquivo nao foi enviado\n";
+ // return;
+ //}
+
+ // Envia o segundo frame com o nome do arquivo
+ //cout << "Enviando nome do arquivo\n";
+ //string name = "NAME";
+ //vector<char> fileNameVector(name.begin(), name.end());
+ //fileNameVector.insert(fileNameVector.end(), fileName.begin(), fileName.end());
+
+ //if (!send_message(fileNameVector, MIDIA)) {
+ // cout << "Limite de timout, arquivo nao foi enviado\n";
+ // return;
+ //}
+
+ //cout << "Enviando arquivo\n";
+ //vector<char> file = read_file(fileName);
+ //if ( file.empty())
+ //{
+ // cout << "Falha ao abrir o arquivo para leitura\n";
+ // return;
+ //}
+
+ //if (!send_message(file, DADOS)) {
+ // cout << "Limite de timout, arquivo nao foi enviado\n";
+ // return;
+ //}
+
--
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