#971 split wake on lan code

Add wol.c and wol.h that implements WakeOnLan.

1 files changed, 67 insertions, 0 deletions

diff --git a/src/wol.c b/src/wol.c
new file mode 100644
index 0000000..79bfaa3
--- /dev/null
+++ b/src/wol.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2020 Soleta Networks <info@soleta.eu>
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Affero General Public License as published by the
+ * Free Software Foundation, version 3.
+ */
+#include <sys/types.h>
+#include <ifaddrs.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <syslog.h>
+#include <stddef.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <fcntl.h>
+#include "wol.h"
+#include "ogAdmServer.h"
+
+bool wake_up_send(int sd, struct sockaddr_in *client,
+		  const struct wol_msg *msg, const struct in_addr *addr)
+{
+	int ret;
+
+	client->sin_addr.s_addr = addr->s_addr;
+
+	ret = sendto(sd, msg, sizeof(*msg), 0,
+		     (struct sockaddr *)client, sizeof(*client));
+	if (ret < 0) {
+		syslog(LOG_ERR, "failed to send wol\n");
+		return false;
+	}
+
+	return true;
+}
+
+bool wake_up_broadcast(int sd, struct sockaddr_in *client,
+		       const struct wol_msg *msg)
+{
+	struct sockaddr_in *broadcast_addr, addr = {};
+	struct ifaddrs *ifaddr, *ifa;
+
+	if (getifaddrs(&ifaddr) < 0) {
+		syslog(LOG_ERR, "cannot get list of addresses\n");
+		return false;
+	}
+
+	addr.sin_addr.s_addr = htonl(INADDR_BROADCAST);
+
+	for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
+		if (ifa->ifa_addr == NULL ||
+		    ifa->ifa_addr->sa_family != AF_INET ||
+		    strcmp(ifa->ifa_name, interface) != 0)
+			continue;
+
+		broadcast_addr =
+			(struct sockaddr_in *)ifa->ifa_ifu.ifu_broadaddr;
+		addr.sin_addr.s_addr = broadcast_addr->sin_addr.s_addr;
+		break;
+	}
+	freeifaddrs(ifaddr);
+
+	return wake_up_send(sd, client, msg, &addr.sin_addr);
+}