From 3c80cd2b7744a366d39de684c6451285b94a4d1b Mon Sep 17 00:00:00 2001
From: Trumeet <yuuta@yuuta.moe>
Date: Fri, 26 Feb 2021 13:36:37 -0800
Subject: First Commit

---
 net/net.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 net/net.c

(limited to 'net/net.c')

diff --git a/net/net.c b/net/net.c
new file mode 100644
index 0000000..d999f8e
--- /dev/null
+++ b/net/net.c
@@ -0,0 +1,60 @@
+/*
+ * Adopted from mcrcon, Copyright (c) 2012-2020, Tiiffi <tiiffi at gmail>.
+ * https://github.com/Tiiffi/mcrcon/tree/b02201d689b3032bc681b28f175fd3d83d167293
+ */
+
+#include "net.h"
+#include "../common.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+int net_connect(const char *host, const char *port, int *out)
+{
+	int sd;
+	struct addrinfo hints;
+	struct addrinfo *server_info, *p;
+	memset(&hints, 0, sizeof hints);
+	hints.ai_family = AF_UNSPEC;
+	hints.ai_socktype = SOCK_STREAM;
+	hints.ai_protocol = IPPROTO_TCP;
+	int ret = getaddrinfo(host, port, &hints, &server_info);
+	if(ret)
+	{
+		fprintf(stderr, _("Cannot resolve host %s: %s.\n"), host, strerror(ret));
+		return EX_IOERR;
+	}
+	for (p = server_info; p != NULL; p = p->ai_next)
+	{
+		sd = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
+		if (sd == -1) continue;
+		ret = connect(sd, p->ai_addr, p->ai_addrlen);
+		if(ret == -1)
+		{
+			net_close(sd);
+			continue;
+		}
+		break;
+	}
+	if(p == NULL)
+	{
+		fprintf(stderr, _("Cannot connect to %s:%s : %s.\n"), host, port, strerror(errno));
+		freeaddrinfo(server_info);
+		return EX_IOERR;
+	}
+	freeaddrinfo(server_info);
+	*out = sd;
+	return 0;
+}
+
+void net_close(int sd)
+{
+	close(sd);
+}
-- 
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