Adding upstream version 4.5.upstream/4.5upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 156 insertions, 0 deletions

diff --git a/socket.h b/socket.h
new file mode 100644
index 0000000..8b178e2
--- /dev/null
+++ b/socket.h
@@ -0,0 +1,156 @@
+/*
+  chronyd/chronyc - Programs for keeping computer clocks accurate.
+
+ **********************************************************************
+ * Copyright (C) Miroslav Lichvar  2019
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ * 
+ **********************************************************************
+
+  =======================================================================
+
+  This is the header file for socket operations.
+
+  */
+
+#ifndef GOT_SOCKET_H
+#define GOT_SOCKET_H
+
+#include "addressing.h"
+
+/* Flags for opening sockets */
+#define SCK_FLAG_BLOCK 1
+#define SCK_FLAG_BROADCAST 2
+#define SCK_FLAG_RX_DEST_ADDR 4
+#define SCK_FLAG_ALL_PERMISSIONS 8
+#define SCK_FLAG_PRIV_BIND 16
+
+/* Flags for receiving and sending messages */
+#define SCK_FLAG_MSG_ERRQUEUE 1
+#define SCK_FLAG_MSG_DESCRIPTOR 2
+
+typedef enum {
+  SCK_ADDR_UNSPEC = 0,
+  SCK_ADDR_IP,
+  SCK_ADDR_UNIX
+} SCK_AddressType;
+
+typedef struct {
+  void *data;
+  int length;
+  SCK_AddressType addr_type;
+  int if_index;
+
+  union {
+    IPSockAddr ip;
+    const char *path;
+  } remote_addr;
+
+  union {
+    IPAddr ip;
+  } local_addr;
+
+  struct {
+    struct timespec kernel;
+    struct timespec hw;
+    int if_index;
+    int l2_length;
+    int tx_flags;
+  } timestamp;
+
+  int descriptor;
+} SCK_Message;
+
+/* Pre-initialisation function */
+extern void SCK_PreInitialise(void);
+
+/* Initialisation function (the specified IP family is enabled,
+   or all if IPADDR_UNSPEC) */
+extern void SCK_Initialise(int family);
+
+/* Finalisation function */
+extern void SCK_Finalise(void);
+
+/* Check if support for the IP family is enabled */
+extern int SCK_IsIpFamilyEnabled(int family);
+
+/* Get the 0.0.0.0/::0 or 127.0.0.1/::1 address */
+extern void SCK_GetAnyLocalIPAddress(int family, IPAddr *local_addr);
+extern void SCK_GetLoopbackIPAddress(int family, IPAddr *local_addr);
+
+/* Check if an IP address is a link-local address */
+extern int SCK_IsLinkLocalIPAddress(IPAddr *addr);
+
+/* Specify a bind()-like function for binding sockets to privileged ports when
+   running in a restricted process (e.g. after dropping root privileges) */
+extern void SCK_SetPrivBind(int (*function)(int sock_fd, struct sockaddr *address,
+                                            socklen_t address_len));
+
+/* Open a socket (addresses and iface may be NULL) */
+extern int SCK_OpenUdpSocket(IPSockAddr *remote_addr, IPSockAddr *local_addr,
+                             const char *iface, int flags);
+extern int SCK_OpenTcpSocket(IPSockAddr *remote_addr, IPSockAddr *local_addr,
+                             const char *iface, int flags);
+extern int SCK_OpenUnixDatagramSocket(const char *remote_addr, const char *local_addr,
+                                      int flags);
+extern int SCK_OpenUnixStreamSocket(const char *remote_addr, const char *local_addr,
+                                    int flags);
+extern int SCK_OpenUnixSocketPair(int flags, int *other_fd);
+
+/* Check if a file descriptor was passed from the service manager */
+extern int SCK_IsReusable(int sock_fd);
+
+/* Close all reusable sockets before finalisation (e.g. in a helper process) */
+extern void SCK_CloseReusableSockets(void);
+
+/* Set and get a socket option of int size */
+extern int SCK_SetIntOption(int sock_fd, int level, int name, int value);
+extern int SCK_GetIntOption(int sock_fd, int level, int name, int *value);
+
+/* Enable RX timestamping socket option */
+extern int SCK_EnableKernelRxTimestamping(int sock_fd);
+
+/* Operate on a stream socket - listen()/accept()/shutdown() wrappers */
+extern int SCK_ListenOnSocket(int sock_fd, int backlog);
+extern int SCK_AcceptConnection(int sock_fd, IPSockAddr *remote_addr);
+extern int SCK_ShutdownConnection(int sock_fd);
+
+/* Receive and send data on connected sockets - recv()/send() wrappers */
+extern int SCK_Receive(int sock_fd, void *buffer, int length, int flags);
+extern int SCK_Send(int sock_fd, const void *buffer, int length, int flags);
+
+/* Receive a single message or multiple messages.  The functions return
+   a pointer to static buffers, or NULL on error.  The buffers are valid until
+   another call of the functions and can be reused for sending messages. */
+extern SCK_Message *SCK_ReceiveMessage(int sock_fd, int flags);
+extern SCK_Message *SCK_ReceiveMessages(int sock_fd, int flags, int *num_messages);
+
+/* Initialise a new message (e.g. before sending) */
+extern void SCK_InitMessage(SCK_Message *message, SCK_AddressType addr_type);
+
+/* Send a message */
+extern int SCK_SendMessage(int sock_fd, SCK_Message *message, int flags);
+
+/* Remove bound Unix socket */
+extern int SCK_RemoveSocket(int sock_fd);
+
+/* Close the socket */
+extern void SCK_CloseSocket(int sock_fd);
+
+/* Convert between IPSockAddr and sockaddr_in/in6 */
+extern void SCK_SockaddrToIPSockAddr(struct sockaddr *sa, int sa_length, IPSockAddr *ip_sa);
+extern int SCK_IPSockAddrToSockaddr(IPSockAddr *ip_sa, struct sockaddr *sa, int sa_length);
+
+#endif