X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=net.h;h=75389aecda5d7a5101771f526d74887f34177513;hp=6613d3f93d606cfe2daa81323298c86cefb670f7;hb=d5538ff0dd9f6531a1a319b49c32bd72597fb2c3;hpb=e1890028c21d233087266fd7997d68a88cb9afce diff --git a/net.h b/net.h index 6613d3f9..75389aec 100644 --- a/net.h +++ b/net.h @@ -1,8 +1,9 @@ /* - * Copyright (C) 2006-2007 Andre Noll + * Copyright (C) 2006-2010 Andre Noll * * Licensed under the GPL v2. For licencing details see COPYING. */ +#include /** \file net.h exported symbols from net.c */ @@ -16,48 +17,149 @@ #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. */ -int tcp_connect(char *host, int port); -int get_stream_socket(int domain); -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);