From b1b94e828f477b384eb36a8cee9e511069ee77a5 Mon Sep 17 00:00:00 2001
From: Paul Oliver <contact@pauloliver.dev>
Date: Tue, 28 Apr 2026 00:06:58 +0200
Subject: Adds native server and client (WIP)

---
 core/client.c |  28 ++++++++++++++++
 core/server.c | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 128 insertions(+)
 create mode 100644 core/client.c
 create mode 100644 core/server.c

(limited to 'core')

diff --git a/core/client.c b/core/client.c
new file mode 100644
index 0000000..220a90c
--- /dev/null
+++ b/core/client.c
@@ -0,0 +1,28 @@
+#include <arpa/inet.h>
+#include <json-c/json.h>
+
+#include "logger.c"
+
+int main(void) {
+    log_info("Initializing salis data client");
+    int client_fd = socket(AF_INET, SOCK_STREAM, 0);
+    struct sockaddr_in server_addr = { 0 };
+    server_addr.sin_family = AF_INET;
+    server_addr.sin_addr.s_addr = inet_addr(IP);
+    server_addr.sin_port = htons(PORT);
+
+    log_info("Attempting to connect to salis data server at: %s:%d", IP, PORT);
+    if (connect(client_fd, (struct sockaddr *)&server_addr, sizeof(struct sockaddr_in))) {
+        log_warn("Could not connect to salis data server!");
+        return 1;
+    }
+
+    log_info("Fetching simulation info");
+    write(client_fd, "o", sizeof(char));
+    struct json_object *response = json_object_from_fd(client_fd);
+    const char *str_rep = json_object_to_json_string_ext(response, JSON_C_TO_STRING_PRETTY);
+    printf("resp: %s\n", str_rep);
+
+    close(client_fd);
+    return 0;
+}
diff --git a/core/server.c b/core/server.c
new file mode 100644
index 0000000..388776d
--- /dev/null
+++ b/core/server.c
@@ -0,0 +1,100 @@
+#include <arpa/inet.h>
+#include <json-c/json.h>
+#include <signal.h>
+#include <string.h>
+#include <threads.h>
+
+#include "logger.c"
+
+#define BACKLOG 10
+#define REQUEST_OPTS 'o'
+
+struct Client {
+    int fd;
+    struct sockaddr_in addr;
+};
+
+void sig_handler(int signo) {
+    log_warn("Signal %d received, shutting down server", signo);
+    exit(0);
+}
+
+void respond_opts(int client_fd) {
+    log_info("Client requested simulator options");
+
+    struct json_object *response = json_object_new_object();
+    json_object_object_add(response, "anc", json_object_new_string(ANC));
+    json_object_object_add(response, "arch", json_object_new_string(ARCH));
+    json_object_object_add(response, "auto-save-interval", json_object_new_int64(AUTOSAVE_INTERVAL));
+    json_object_object_add(response, "clones", json_object_new_int64(CLONES));
+    json_object_object_add(response, "compress", json_object_new_boolean(COMPRESS));
+    json_object_object_add(response, "cores", json_object_new_int64(CORES));
+    json_object_object_add(response, "data-push", json_object_new_boolean(DATA_PUSH));
+    json_object_object_add(response, "data-push-interval", json_object_new_int64(DATA_PUSH_INTERVAL));
+    json_object_object_add(response, "muta-flip", json_object_new_boolean(MUTA_FLIP));
+    json_object_object_add(response, "muta-range", json_object_new_int64(MUTA_RANGE));
+    json_object_object_add(response, "mvec-loop", json_object_new_boolean(MVEC_LOOP));
+    json_object_object_add(response, "mvec-size", json_object_new_int64(MVEC_SIZE));
+    json_object_object_add(response, "name", json_object_new_string(NAME));
+    json_object_object_add(response, "seed", json_object_new_int64(SEED));
+    json_object_object_add(response, "sync-interval", json_object_new_int64(SYNC_INTERVAL));
+
+    const char *str_rep = json_object_to_json_string_ext(response, JSON_C_TO_STRING_PRETTY);
+    send(client_fd, str_rep, strlen(str_rep), 0);
+    json_object_put(response);
+}
+
+int handle_client(struct Client *client) {
+    assert(client);
+
+    char client_ip[INET_ADDRSTRLEN];
+    inet_ntop(AF_INET, &client->addr.sin_addr, client_ip, INET_ADDRSTRLEN);
+    log_info("Client connected: %s:%d", client_ip, ntohs(client->addr.sin_port));
+
+    char request = '\0';
+    recv(client->fd, &request, 1, 0);
+
+    switch (request) {
+    case REQUEST_OPTS: respond_opts(client->fd); break;
+    default: log_warn("Client made invalid request");
+    }
+
+    log_info("Client disconnected: %s:%d", client_ip, ntohs(client->addr.sin_port));
+    close(client->fd);
+
+    free(client);
+    return 0;
+}
+
+int main(void) {
+    signal(SIGINT, sig_handler);
+    signal(SIGTERM, sig_handler);
+
+    log_info("Initializing salis data server");
+    int opt = 1;
+    int server_fd = socket(AF_INET, SOCK_STREAM, 0);
+    setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
+
+    log_info("Binding to port: %d", PORT);
+    struct sockaddr_in server_addr = { 0 };
+    server_addr.sin_family = AF_INET;
+    server_addr.sin_addr.s_addr = INADDR_ANY;
+    server_addr.sin_port = htons(PORT);
+    bind(server_fd, (struct sockaddr *)&server_addr, sizeof(struct sockaddr_in));
+
+    log_info("Listening...");
+    listen(server_fd, BACKLOG);
+
+    while (true) {
+        struct Client *client = calloc(1, sizeof(struct Client));
+        socklen_t client_len = sizeof(struct sockaddr_in);
+        client->fd = accept(server_fd, (struct sockaddr *)&client->addr, &client_len);
+
+        thrd_t thrd;
+        thrd_create(&thrd, (thrd_start_t)handle_client, client);
+        thrd_detach(thrd);
+    }
+
+    close(server_fd);
+    return 0;
+}
-- 
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