/*
- * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2010 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
+#include <stdbool.h>
/** \file net.h exported symbols from net.c */
#define UNIX_PATH_MAX 108
#endif
-/** used to crypt the communication between para_server and para_client */
-typedef void crypt_function(unsigned long len,
- const unsigned char *indata, unsigned char *outdata, void *private_data);
+/* Userland defines for Linux DCCP support. */
-#include <netdb.h> /* hostent */
-int get_host_info(char *host, struct hostent **ret);
-int get_stream_socket(int domain);
-void init_sockaddr(struct sockaddr_in*, int, const struct hostent*);
-int send_buffer(int, const char *);
-int send_bin_buffer(int, const char *, size_t);
-__printf_2_3 int send_va_buffer(int fd, const char *fmt, ...);
-int recv_buffer(int fd, char *buf, size_t size);
-int recv_bin_buffer(int fd, char *buf, size_t size);
-int para_accept(int, void *addr, socklen_t size);
-int create_local_socket(const char *name, struct sockaddr_un *unix_addr,
- mode_t mode);
-int init_unix_addr(struct sockaddr_un *, const char *);
-int recv_cred_buffer(int, char *, size_t);
-ssize_t send_cred_buffer(int, char*);
-int recv_pattern(int fd, const char *pattern, size_t bufsize);
-int init_tcp_socket(int port);
-void enable_crypt(int fd, crypt_function *recv_f, crypt_function *send_f,
- void *private_data);
-void disable_crypt(int fd);
+#ifndef IPPROTO_DCCP
+#define IPPROTO_DCCP 33 /**< IANA assigned value. */
+#endif
+
+#ifndef SOCK_DCCP
+#define SOCK_DCCP 6 /**< Linux socket type. */
+#endif
+
+#ifndef DCCP_SOCKOPT_RX_CCID
+/** Per-connection CCID support (set/get the RX CCID, since v2.6.30-rc1). */
+#define DCCP_SOCKOPT_RX_CCID 15
+#endif
+
+#ifndef SOL_DCCP
+#define SOL_DCCP 269 /**< Linux socket level. */
+#endif
+
+#ifndef DCCP_SOCKOPT_GET_CUR_MPS
+#define DCCP_SOCKOPT_GET_CUR_MPS 5 /**< Max packet size, RFC 4340, 14. */
+#endif
+
+#ifndef DCCP_SOCKOPT_AVAILABLE_CCIDS
+#define DCCP_SOCKOPT_AVAILABLE_CCIDS 12 /**< List of supported CCIDs. */
+#endif
+
+#ifndef DCCP_SOCKOPT_CCID
+#define DCCP_SOCKOPT_CCID 13 /**< Sets both TX/RX CCID. */
+#endif
+
+#ifndef DCCP_SOCKOPT_TX_CCID
+#define DCCP_SOCKOPT_TX_CCID 14 /**< Set/get the TX CCID. */
+#endif
/**
- * A wrapper around connect(2).
+ * Flowopts: Transport-layer independent encapsulation of socket options
+ * that need to be registered prior to setting up a connection.
+ */
+struct flowopts;
+
+extern struct flowopts *flowopt_new(void);
+extern void flowopt_add(struct flowopts *fo, int level, int opt,
+ char *name, const void *val, int len);
+extern void flowopt_add_bool(struct flowopts *fo, int lev, int opt,
+ char *optname, bool on_or_off);
+/** Flowopt shortcut macros */
+#define OPT_ADD(fo, lev, opt, val, len) flowopt_add(fo, lev, opt, #opt, val, len)
+#define OPT_ENABLE(fo, lev, opt) flowopt_add_bool(fo, lev, opt, #opt, 1)
+#define OPT_DISABLE(fo, lev, opt) flowopt_add_bool(fo, lev, opt, #opt, 0)
+
+/**
+ * Functions to parse and validate (parts of) URLs.
+ */
+extern char *parse_cidr(const char *cidr,
+ char *addr, ssize_t addrlen, int32_t *netmask);
+extern char *parse_url(const char *url,
+ char *host, ssize_t hostlen, int32_t *port);
+extern const char *stringify_port(int port, const char *transport);
+/**
+ * Ensure that string conforms to the IPv4 address format.
*
- * \param fd The file descriptor.
- * \param addr The address to connect.
- * \param len The size of \a addr.
+ * \param address The address string to check.
*
- * This should not be called directly. Always use the PARA_CONNECT macro.
+ * \return 1 if \a address conforms to the IPv4 address format, else 0.
+ */
+_static_inline_ bool is_valid_ipv4_address(const char *address)
+{
+ struct in_addr test_it;
+
+ return inet_pton(AF_INET, address, &test_it) != 0;
+}
+
+/**
+ * Ensure that string conforms to IPv6 address format.
*
- * \return \p -E_CONNECT on errors, 1 on success.
+ * \param address The address string to check.
*
- * \sa connect(2), PARA_CONNECT.
+ * \return 1 if string has a valid IPv6 address syntax, 0 if not.
+ * \sa RFC 4291
*/
-static inline int _para_connect(int fd, void *addr, socklen_t len)
+_static_inline_ bool is_valid_ipv6_address(const char *address)
+{
+ struct in6_addr test_it;
+
+ return inet_pton(AF_INET6, address, &test_it) != 0;
+}
+
+/**
+ * Generic socket creation (passive and active sockets).
+ */
+extern int makesock(unsigned l4type, bool passive,
+ const char *host, uint16_t port_number,
+ struct flowopts *fo);
+
+static inline int para_connect_simple(unsigned l4type,
+ const char *host, uint16_t port)
{
- if (connect(fd, (struct sockaddr *)addr, len) == -1)
- return -E_CONNECT;
- return 1;
+ return makesock(l4type, 0, host, port, NULL);
}
-/** A macro for connect() which does not need a \a len parameter. */
-#define PARA_CONNECT(fd, addr) _para_connect(fd, addr, sizeof(*(addr)))
+extern struct in_addr extract_v4_addr(const struct sockaddr_storage *ss);
+
+/**
+ * Functions to support listening sockets.
+ */
+/** How many pending connections queue of a listening server will hold. */
+#define BACKLOG 10
+extern int para_listen(unsigned l4type, uint16_t port, struct flowopts *fo);
+
+static inline int para_listen_simple(unsigned l4type, uint16_t port)
+{
+ return para_listen(l4type, port, NULL);
+}
+
+/** Pretty-printing of IPv4/6 socket addresses */
+extern char *local_name(int sockfd);
+extern char *remote_name(int sockfd);
+
+/**
+ * Determining maximum payload (packet) size
+ */
+extern int generic_max_transport_msg_size(int sockfd);
+
+int send_bin_buffer(int, const char *, size_t);
+int send_buffer(int, const char *);
+__printf_2_3 int send_va_buffer(int fd, const char *fmt, ...);
+
+int recv_bin_buffer(int fd, char *buf, size_t size);
+int recv_buffer(int fd, char *buf, size_t size);
+
+int para_accept(int fd, fd_set *rfds, void *addr, socklen_t size, int *new_fd);
+int create_local_socket(const char *name, struct sockaddr_un *unix_addr,
+ mode_t mode);
+int connect_local_socket(const char *name);
+int recv_cred_buffer(int, char *, size_t);
+ssize_t send_cred_buffer(int, char*);
+
+/**
+ * Functions and definitions to support \p IPPROTO_DCCP
+ */
+/** Estimated worst-case length of a DCCP header including options. */
+#define DCCP_MAX_HEADER 128
+/** Hardcoded maximum number of separate CCID modules compiled into a host. */
+#define DCCP_MAX_HOST_CCIDS 20
+extern int dccp_available_ccids(uint8_t **ccid_array);
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