e78b7629348bde49831ccc31a2f660719ad3d16d
[paraslash.git] / net.h
1 /*
2 * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file net.h exported symbols from net.c */
8
9 /**
10 * the buffer size of the sun_path component of struct sockaddr_un
11 *
12 * While glibc doesn't define \p UNIX_PATH_MAX, it
13 * documents it has being limited to 108 bytes.
14 */
15 #ifndef UNIX_PATH_MAX
16 #define UNIX_PATH_MAX 108
17 #endif
18
19 /** \cond Userland defines for Linux DCCP support. */
20 #ifndef IPPROTO_DCCP
21 #define IPPROTO_DCCP 33 /**< IANA assigned value */
22 #define SOCK_DCCP 6 /**< Linux socket type */
23 #define SOL_DCCP 269 /**< Linux socket level */
24 #endif
25 /** \endcond */
26
27 /**
28 * Generic socket creation (passive and active sockets).
29 */
30 extern int makesock(unsigned l3type, unsigned l4type, int passive,
31 const char *host, unsigned short port_number);
32
33 /**
34 * Functions to support listening sockets.
35 */
36 /** How many pending connections queue of a listening server will hold. */
37 #define BACKLOG 10
38 extern int para_listen(unsigned l3type, unsigned l4type, unsigned short port);
39
40 /** used to crypt the communication between para_server and para_client */
41 typedef void crypt_function(unsigned long len,
42 const unsigned char *indata, unsigned char *outdata, void *private_data);
43
44 int tcp_connect(char *host, int port);
45 int get_stream_socket(int domain);
46 int send_buffer(int, const char *);
47 int send_bin_buffer(int, const char *, size_t);
48 __printf_2_3 int send_va_buffer(int fd, const char *fmt, ...);
49 int recv_buffer(int fd, char *buf, size_t size);
50 int recv_bin_buffer(int fd, char *buf, size_t size);
51 int para_accept(int, void *addr, socklen_t size);
52 int create_local_socket(const char *name, struct sockaddr_un *unix_addr,
53 mode_t mode);
54 int init_unix_addr(struct sockaddr_un *, const char *);
55 int recv_cred_buffer(int, char *, size_t);
56 ssize_t send_cred_buffer(int, char*);
57 int recv_pattern(int fd, const char *pattern, size_t bufsize);
58 int tcp_listen(int port);
59 void enable_crypt(int fd, crypt_function *recv_f, crypt_function *send_f,
60 void *private_data);
61 void disable_crypt(int fd);
62
63 /**
64 * A wrapper around connect(2).
65 *
66 * \param fd The file descriptor.
67 * \param addr The address to connect.
68 * \param len The size of \a addr.
69 *
70 * This should not be called directly. Always use the PARA_CONNECT macro.
71 *
72 * \return \p -E_CONNECT on errors, 1 on success.
73 *
74 * \sa connect(2), PARA_CONNECT.
75 */
76 static inline int _para_connect(int fd, void *addr, socklen_t len)
77 {
78 if (connect(fd, (struct sockaddr *)addr, len) == -1)
79 return -E_CONNECT;
80 return 1;
81 }
82
83 /** A macro for connect() which does not need a \a len parameter. */
84 #define PARA_CONNECT(fd, addr) _para_connect(fd, addr, sizeof(*(addr)))