refactor: split monolithic modules and extract shared components

- Remove dead socket.c/socket.h (accumulated duplicate symbols) - Extract compression.h/c (data_compress/decompress from data.c) - Extract io.h/c (low-level I/O from protocol.c) - Extract metadata.h/c (unified metadata wire format from file.c, chunk.c, utils.c) - Split client.c into client_cli.c (CLI parsing) + client_send.c (send logic) - Move receiver pipeline threads from server.c to multiprocessing.c - Move to_disk/file_restore_metadata from utils.c to file.c/metadata.c - Fix const qualifiers on to_disk and str_dup signatures - Suppress chown unused-result warning
2026-07-15 19:36:26 +02:00
parent b3f69208ce
commit 02619cca5c
29 changed files with 942 additions and 832 deletions
@@ -0,0 +1,119 @@
+#include "transport_tcp.h"
+#include "log.h"
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+Server *server_create(int port) {
+  Server *server = (Server *)malloc(sizeof(Server));
+  if (server == NULL) {
+    perror("Could not allocate space for Server");
+    exit(EXIT_FAILURE);
+  }
+
+  int file_descriptor = socket(AF_INET, SOCK_STREAM, 0);
+  if (file_descriptor < 0) {
+    perror("Could not create Socket!");
+    exit(EXIT_FAILURE);
+  }
+  server->file_descriptor = file_descriptor;
+  int opt = 1;
+  if (setsockopt(server->file_descriptor, SOL_SOCKET, SO_REUSEADDR, &opt,
+                 sizeof(opt))) {
+    perror("Error setting a socket option!");
+    close(server->file_descriptor);
+    free(server);
+    exit(EXIT_FAILURE);
+  }
+
+  server->address.sin_family = AF_INET;
+  server->address.sin_addr.s_addr = INADDR_ANY;
+  server->address.sin_port = htons(port);
+  server->address_length = sizeof(server->address);
+
+  if (bind(server->file_descriptor, (struct sockaddr *)&server->address,
+           server->address_length) < 0) {
+    perror("Could not bind server");
+    close(server->file_descriptor);
+    free(server);
+    exit(EXIT_FAILURE);
+  }
+
+  return server;
+}
+
+void server_delete(Server **server) {
+  if (server == NULL || *server == NULL) return;
+  free(*server);
+  *server = NULL;
+}
+
+void server_listen(Server *server, void (*handler)(int file_descriptor)) {
+  log_message(LOG_LEVEL_INFO, "Start Listening on Port: %d",
+              server->address.sin_port);
+  if (listen(server->file_descriptor, 3) < 0) {
+    perror("Could not listen on port!");
+    exit(EXIT_FAILURE);
+  }
+
+  int file_descriptor =
+      accept(server->file_descriptor, (struct sockaddr *)&server->address,
+             &server->address_length);
+  if (file_descriptor < 0) {
+    perror("Could not accept the connection");
+    exit(EXIT_FAILURE);
+  }
+  log_message(LOG_LEVEL_INFO, "Received Connection");
+  handler(file_descriptor);
+  close(server->file_descriptor);
+  close(file_descriptor);
+}
+
+Client *client_create() {
+  int file_descriptor = socket(AF_INET, SOCK_STREAM, 0);
+  if (file_descriptor < 0) {
+    perror("Could not create Socket!");
+    exit(EXIT_FAILURE);
+  }
+
+  Client *client = (Client *)malloc(sizeof(Client));
+  client->file_descriptor = file_descriptor;
+  client->address.sin_family = AF_INET;
+  client->address_length = sizeof(client->address);
+  client->ssh_child_pid = -1;
+  return client;
+}
+
+void client_connect(Client *client, char *host, int port) {
+  client->address.sin_port = htons(port);
+
+  if (inet_pton(AF_INET, host, &client->address.sin_addr) <= 0) {
+    perror("Could not convert host address!");
+    exit(EXIT_FAILURE);
+  }
+
+  if (connect(client->file_descriptor, (struct sockaddr *)&client->address,
+              client->address_length) < 0) {
+    perror("Could not connect to Server!");
+    exit(EXIT_FAILURE);
+  }
+}
+
+void client_disconnect(Client *client) {
+  close(client->file_descriptor);
+  if (client->ssh_child_pid > 0) {
+    int status;
+    waitpid(client->ssh_child_pid, &status, 0);
+    client->ssh_child_pid = -1;
+  }
+}
+
+void client_delete(Client *client) {
+  if (client == NULL)
+    return;
+  free(client);
+}