X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=net.h;h=b2bb47c9b40b43fe2eb7c8813e6ffa7364b0853e;hp=4a89778b87495136ca046813c3af274201097b19;hb=74592ed100009a2d73e03861ae9626363f06aca9;hpb=8a8cd0f5bb40dcfad68608193e8c57decd90b25e diff --git a/net.h b/net.h index 4a89778b..b2bb47c9 100644 --- a/net.h +++ b/net.h @@ -1,54 +1,162 @@ /* - * Copyright (C) 2006 Andre Noll + * Copyright (C) 2006 Andre Noll * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. + * Licensed under the GPL v2. For licencing details see COPYING. + */ +/** \file net.h exported symbols from net.c */ + +/** + * The buffer size of the sun_path component of struct sockaddr_un. + * + * While glibc doesn't define \p UNIX_PATH_MAX, it documents it has being + * limited to 108 bytes. On NetBSD it is only 104 bytes though. We trust \p + * UNIX_PATH_MAX if it is defined and use the size of the ->sun_path member + * otherwise. This should be safe everywhere. + */ +#ifndef UNIX_PATH_MAX +#define UNIX_PATH_MAX (sizeof(((struct sockaddr_un *)0)->sun_path)) +#endif + +/* Userland defines for Linux DCCP support. */ + +#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 + +/** + * 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, + const char *name, const void *val, int len); +void flowopt_cleanup(struct flowopts *fo); +/** Flowopt shortcut macros */ +#define OPT_ADD(fo, lev, opt, val, len) flowopt_add(fo, lev, opt, #opt, val, len) + +/** + * 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. * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * \param address The address string to check. * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. + * \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; -/** \file net.h exported symbols from net.c */ + return inet_pton(AF_INET, address, &test_it) != 0; +} /** - * the buffer size of the sun_path component of struct sockaddr_un + * Ensure that string conforms to IPv6 address format. + * + * \param address The address string to check. * - * While glibc doesn't define \p UNIX_PATH_MAX, it - * documents it has being limited to 108 bytes. + * \return 1 if string has a valid IPv6 address syntax, 0 if not. + * \sa RFC 4291 */ -#ifndef UNIX_PATH_MAX -#define UNIX_PATH_MAX 108 -#endif - -typedef void crypt_function(unsigned long len, - const unsigned char *indata, unsigned char *outdata, void *private_data); - -#include /* hostent */ -int get_host_info(char *host, struct hostent **ret); -int get_socket(void); -void init_sockaddr(struct sockaddr_in*, int, const struct hostent*); -int para_connect(int, struct sockaddr_in *); -int send_buffer(int, const char *); -int send_bin_buffer(int, const char *, size_t); -int send_va_buffer(int, const char *, ...); -int recv_buffer(int, char *, ssize_t); -int recv_bin_buffer(int, char *, ssize_t); -int para_accept(int, void *addr, socklen_t size); -int create_pf_socket(const char *, struct sockaddr_un *, int mod); -int init_unix_addr(struct sockaddr_un *, const char *); +_static_inline_ bool is_valid_ipv6_address(const char *address) +{ + struct in6_addr test_it; + + return inet_pton(AF_INET6, address, &test_it) != 0; +} + +int lookup_address(unsigned l4type, bool passive, const char *host, + int port_number, struct addrinfo **result); + +/** + * Generic socket creation (passive and active sockets). + */ +int makesock(unsigned l4type, bool passive, const char *host, + uint16_t port_number, struct flowopts *fo); + +int makesock_addrinfo(unsigned l4type, bool passive, struct addrinfo *ai, + struct flowopts *fo); + +static inline int para_connect_simple(unsigned l4type, + const char *host, uint16_t port) +{ + return makesock(l4type, 0, host, port, NULL); +} + +void extract_v4_addr(const struct sockaddr_storage *ss, struct in_addr *ia); +bool sockaddr_equal(const struct sockaddr *sa1, const struct sockaddr *sa2); + +/** + * 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 *remote_name(int sockfd); + +/** + * Determining maximum payload (packet) size + */ +extern int generic_max_transport_msg_size(int sockfd); + +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, 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*); -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); +/** + * 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);