2 * Copyright (C) 2006-2012 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
6 /** \file net.h exported symbols from net.c */
9 * The buffer size of the sun_path component of struct sockaddr_un.
11 * While glibc doesn't define \p UNIX_PATH_MAX, it documents it has being
12 * limited to 108 bytes. On NetBSD it is only 104 bytes though. We trust \p
13 * UNIX_PATH_MAX if it is defined and use the size of the ->sun_path member
14 * otherwise. This should be safe everywhere.
17 #define UNIX_PATH_MAX (sizeof(((struct sockaddr_un *)0)->sun_path))
20 /* Userland defines for Linux DCCP support. */
23 #define IPPROTO_DCCP 33 /**< IANA assigned value. */
27 #define SOCK_DCCP 6 /**< Linux socket type. */
30 #ifndef DCCP_SOCKOPT_RX_CCID
31 /** Per-connection CCID support (set/get the RX CCID, since v2.6.30-rc1). */
32 #define DCCP_SOCKOPT_RX_CCID 15
36 #define SOL_DCCP 269 /**< Linux socket level. */
39 #ifndef DCCP_SOCKOPT_GET_CUR_MPS
40 #define DCCP_SOCKOPT_GET_CUR_MPS 5 /**< Max packet size, RFC 4340, 14. */
43 #ifndef DCCP_SOCKOPT_AVAILABLE_CCIDS
44 #define DCCP_SOCKOPT_AVAILABLE_CCIDS 12 /**< List of supported CCIDs. */
47 #ifndef DCCP_SOCKOPT_CCID
48 #define DCCP_SOCKOPT_CCID 13 /**< Sets both TX/RX CCID. */
51 #ifndef DCCP_SOCKOPT_TX_CCID
52 #define DCCP_SOCKOPT_TX_CCID 14 /**< Set/get the TX CCID. */
56 * Flowopts: Transport-layer independent encapsulation of socket options
57 * that need to be registered prior to setting up a connection.
61 extern struct flowopts
*flowopt_new(void);
62 extern void flowopt_add(struct flowopts
*fo
, int level
, int opt
,
63 const char *name
, const void *val
, int len
);
64 extern void flowopt_add_bool(struct flowopts
*fo
, int lev
, int opt
,
65 const char *optname
, bool on_or_off
);
66 /** Flowopt shortcut macros */
67 #define OPT_ADD(fo, lev, opt, val, len) flowopt_add(fo, lev, opt, #opt, val, len)
68 #define OPT_ENABLE(fo, lev, opt) flowopt_add_bool(fo, lev, opt, #opt, 1)
69 #define OPT_DISABLE(fo, lev, opt) flowopt_add_bool(fo, lev, opt, #opt, 0)
72 * Functions to parse and validate (parts of) URLs.
74 extern char *parse_cidr(const char *cidr
,
75 char *addr
, ssize_t addrlen
, int32_t *netmask
);
76 extern char *parse_url(const char *url
,
77 char *host
, ssize_t hostlen
, int32_t *port
);
78 extern const char *stringify_port(int port
, const char *transport
);
80 * Ensure that string conforms to the IPv4 address format.
82 * \param address The address string to check.
84 * \return 1 if \a address conforms to the IPv4 address format, else 0.
86 _static_inline_
bool is_valid_ipv4_address(const char *address
)
88 struct in_addr test_it
;
90 return inet_pton(AF_INET
, address
, &test_it
) != 0;
94 * Ensure that string conforms to IPv6 address format.
96 * \param address The address string to check.
98 * \return 1 if string has a valid IPv6 address syntax, 0 if not.
101 _static_inline_
bool is_valid_ipv6_address(const char *address
)
103 struct in6_addr test_it
;
105 return inet_pton(AF_INET6
, address
, &test_it
) != 0;
109 * Generic socket creation (passive and active sockets).
111 extern int makesock(unsigned l4type
, bool passive
,
112 const char *host
, uint16_t port_number
,
113 struct flowopts
*fo
);
115 static inline int para_connect_simple(unsigned l4type
,
116 const char *host
, uint16_t port
)
118 return makesock(l4type
, 0, host
, port
, NULL
);
121 extern struct in_addr
extract_v4_addr(const struct sockaddr_storage
*ss
);
124 * Functions to support listening sockets.
126 /** How many pending connections queue of a listening server will hold. */
128 extern int para_listen(unsigned l4type
, uint16_t port
, struct flowopts
*fo
);
130 static inline int para_listen_simple(unsigned l4type
, uint16_t port
)
132 return para_listen(l4type
, port
, NULL
);
135 /** Pretty-printing of IPv4/6 socket addresses */
136 extern char *local_name(int sockfd
);
137 extern char *remote_name(int sockfd
);
140 * Determining maximum payload (packet) size
142 extern int generic_max_transport_msg_size(int sockfd
);
144 int send_bin_buffer(int, const char *, size_t);
145 int send_buffer(int, const char *);
146 __printf_2_3
int send_va_buffer(int fd
, const char *fmt
, ...);
148 int recv_bin_buffer(int fd
, char *buf
, size_t size
);
149 int recv_buffer(int fd
, char *buf
, size_t size
);
151 int para_accept(int fd
, fd_set
*rfds
, void *addr
, socklen_t size
, int *new_fd
);
152 int create_local_socket(const char *name
, struct sockaddr_un
*unix_addr
,
154 int connect_local_socket(const char *name
);
155 int recv_cred_buffer(int, char *, size_t);
156 ssize_t
send_cred_buffer(int, char*);
159 * Functions and definitions to support \p IPPROTO_DCCP
161 /** Estimated worst-case length of a DCCP header including options. */
162 #define DCCP_MAX_HEADER 128
163 /** Hardcoded maximum number of separate CCID modules compiled into a host. */
164 #define DCCP_MAX_HOST_CCIDS 20
165 extern int dccp_available_ccids(uint8_t **ccid_array
);