1 /* Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
2 /** \file net.h exported symbols from net.c */
5 * The buffer size of the sun_path component of struct sockaddr_un.
7 * While glibc doesn't define \p UNIX_PATH_MAX, it documents it has being
8 * limited to 108 bytes. On NetBSD it is only 104 bytes though. We trust \p
9 * UNIX_PATH_MAX if it is defined and use the size of the ->sun_path member
10 * otherwise. This should be safe everywhere.
13 #define UNIX_PATH_MAX (sizeof(((struct sockaddr_un *)0)->sun_path))
16 /* Userland defines for Linux DCCP support. */
19 #define IPPROTO_DCCP 33 /**< IANA assigned value. */
23 #define SOCK_DCCP 6 /**< Linux socket type. */
26 #ifndef DCCP_SOCKOPT_RX_CCID
27 /** Per-connection CCID support (set/get the RX CCID, since v2.6.30-rc1). */
28 #define DCCP_SOCKOPT_RX_CCID 15
32 #define SOL_DCCP 269 /**< Linux socket level. */
35 #ifndef DCCP_SOCKOPT_GET_CUR_MPS
36 #define DCCP_SOCKOPT_GET_CUR_MPS 5 /**< Max packet size, RFC 4340, 14. */
39 #ifndef DCCP_SOCKOPT_AVAILABLE_CCIDS
40 #define DCCP_SOCKOPT_AVAILABLE_CCIDS 12 /**< List of supported CCIDs. */
43 #ifndef DCCP_SOCKOPT_CCID
44 #define DCCP_SOCKOPT_CCID 13 /**< Sets both TX/RX CCID. */
47 #ifndef DCCP_SOCKOPT_TX_CCID
48 #define DCCP_SOCKOPT_TX_CCID 14 /**< Set/get the TX CCID. */
52 * Flowopts: Transport-layer independent encapsulation of socket options
53 * that need to be registered prior to setting up a connection.
57 extern struct flowopts *flowopt_new(void);
58 extern void flowopt_add(struct flowopts *fo, int level, int opt,
59 const char *name, const void *val, int len);
60 void flowopt_cleanup(struct flowopts *fo);
61 /** Flowopt shortcut macros */
62 #define OPT_ADD(fo, lev, opt, val, len) flowopt_add(fo, lev, opt, #opt, val, len)
65 * Functions to parse and validate (parts of) URLs.
67 extern char *parse_cidr(const char *cidr,
68 char *addr, ssize_t addrlen, int32_t *netmask);
69 extern char *parse_url(const char *url,
70 char *host, ssize_t hostlen, int32_t *port);
71 extern const char *stringify_port(int port, const char *transport);
73 * Ensure that string conforms to the IPv4 address format.
75 * \param address The address string to check.
77 * \return 1 if \a address conforms to the IPv4 address format, else 0.
79 _static_inline_ bool is_valid_ipv4_address(const char *address)
81 struct in_addr test_it;
83 return inet_pton(AF_INET, address, &test_it) != 0;
87 * Ensure that string conforms to IPv6 address format.
89 * \param address The address string to check.
91 * \return 1 if string has a valid IPv6 address syntax, 0 if not.
94 _static_inline_ bool is_valid_ipv6_address(const char *address)
96 struct in6_addr test_it;
98 return inet_pton(AF_INET6, address, &test_it) != 0;
101 int lookup_address(unsigned l4type, bool passive, const char *host,
102 int port_number, struct addrinfo **result);
105 * Generic socket creation (passive and active sockets).
107 int makesock(unsigned l4type, bool passive, const char *host,
108 uint16_t port_number, struct flowopts *fo);
110 int makesock_addrinfo(unsigned l4type, bool passive, struct addrinfo *ai,
111 struct flowopts *fo);
113 static inline int para_connect_simple(unsigned l4type,
114 const char *host, uint16_t port)
116 return makesock(l4type, 0, host, port, NULL);
119 void extract_v4_addr(const struct sockaddr_storage *ss, struct in_addr *ia);
120 bool sockaddr_equal(const struct sockaddr *sa1, const struct sockaddr *sa2);
123 * Functions to support listening sockets.
125 /** How many pending connections queue of a listening server will hold. */
127 extern int para_listen(unsigned l4type, uint16_t port, struct flowopts *fo);
129 static inline int para_listen_simple(unsigned l4type, uint16_t port)
131 return para_listen(l4type, port, NULL);
134 /** Pretty-printing of IPv4/6 socket addresses */
135 extern char *remote_name(int sockfd);
138 * Determining maximum payload (packet) size
140 extern int generic_max_transport_msg_size(int sockfd);
142 int recv_bin_buffer(int fd, char *buf, size_t size);
143 int recv_buffer(int fd, char *buf, size_t size);
145 int para_accept(int fd, fd_set *rfds, void *addr, socklen_t size, int *new_fd);
146 int create_local_socket(const char *name);
147 int connect_local_socket(const char *name);
148 int recv_cred_buffer(int, char *, size_t);
149 ssize_t send_cred_buffer(int, char*);
152 * Functions and definitions to support \p IPPROTO_DCCP
154 /** Estimated worst-case length of a DCCP header including options. */
155 #define DCCP_MAX_HEADER 128
156 /** Hardcoded maximum number of separate CCID modules compiled into a host. */
157 #define DCCP_MAX_HOST_CCIDS 20
158 extern int dccp_available_ccids(uint8_t **ccid_array);