endpoint: server: Add server creation logic

Signed-off-by: Ian Moffett <ian@mirocom.org>

endpoint/core/server_subr.c

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2026, Chloe Moffett
+ * Provided under the BSD-3 clause
+ */
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <strings.h>
+#include <errno.h>
+#include <unistd.h>
+#include "endpoint/server.h"
+#include "endpoint/common.h"
+
+int
+endpoint_server_init(struct endpoint_server *svp)
+{
+    struct sockaddr_in saddr;
+    int error;
+
+    if (svp == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    svp->sockfd = socket(AF_INET, SOCK_STREAM, 0);
+    if (svp->sockfd < 0) {
+        perror("socket");
+        return -1;
+    }
+
+    /* Assign the address */
+    bzero(&saddr, sizeof(saddr));
+    saddr.sin_family = AF_INET;
+    saddr.sin_port = htons(SERVER_PORT);
+    saddr.sin_addr.s_addr = INADDR_ANY;
+
+    /* Try to bind it */
+    error = bind(svp->sockfd, (struct sockaddr *)&saddr, sizeof(saddr));
+    if (error < 0) {
+        perror("bind");
+        close(svp->sockfd);
+        svp->sockfd = -1;
+        return -1;
+    }
+
+    /* Now mark it is active and listening */
+    error = listen(svp->sockfd, SERVER_BACKLOG);
+    if (error < 0) {
+        perror("listen");
+        close(svp->sockfd);
+        svp->sockfd = -1;
+        return -1;
+    }
+
+    return 0;
+}
+
+int
+endpoint_server_close(struct endpoint_server *svp)
+{
+    if (svp == NULL) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    close(svp->sockfd);
+    return 0;
+}