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231 lines
6.8 KiB
C
231 lines
6.8 KiB
C
/******************************************************************************
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* file include/sockunion.h
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* author YuLiang
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* version 1.0.0
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* date 09-Oct-2021
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* brief This file provides all the headers of the sockunion functions.
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******************************************************************************
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* Attention
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*
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* <h2><center>© COPYRIGHT(c) 2021 LandPower</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of LandPower nor the names of its contributors may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************/
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#ifndef _SOCKUNION_H_
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#define _SOCKUNION_H_
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/* Includes ------------------------------------------------------------------*/
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/* Define --------------------------------------------------------------------*/
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#define IPV4_MAX_BITLEN 32
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#define IPV6_MAX_BITLEN 128
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#define PNBBY 8
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#define AFI_IP 1
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#define AFI_IP6 2
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#define AFI_MAX 3
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#define SU_ADDRSTRLEN 46
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/* Default address family. */
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#ifdef HAVE_IPV6
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#define AF_INET_UNION AF_INET6
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#else
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#define AF_INET_UNION AF_INET
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#endif
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/* Exported types ------------------------------------------------------------*/
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/* IPv4 and IPv6 unified prefix structure. */
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typedef struct _prefix
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{
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uint8_t family;
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uint8_t prefixlen;
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union
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{
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uint8_t prefix;
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struct in_addr prefix4;
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#ifdef HAVE_IPV6
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struct in6_addr prefix6;
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#endif /* HAVE_IPV6 */
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struct
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{
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struct in_addr id;
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struct in_addr adv_router;
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} lp;
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uint8_t val[8];
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} u __attribute__ ((aligned (8)));
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} prefix_t;
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/* IPv4 prefix structure. */
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typedef struct _prefix_ipv4
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{
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uint8_t family;
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uint8_t prefixlen;
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struct in_addr prefix __attribute__ ((aligned (8)));
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} prefix_ipv4_t;
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/* IPv6 prefix structure. */
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#ifdef HAVE_IPV6
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typedef struct _prefix_ipv6
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{
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uint8_t family;
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uint8_t prefixlen;
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struct in6_addr prefix __attribute__ ((aligned (8)));
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} prefix_ipv6_t;
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#endif /* HAVE_IPV6 */
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typedef enum
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{
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ACCESS_TYPE_STRING,
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ACCESS_TYPE_NUMBER
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} ACCESS_TYPE_E;
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/* Filter type is made by `permit', `deny' and `dynamic'. */
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typedef enum
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{
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FILTER_DENY,
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FILTER_PERMIT,
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FILTER_DYNAMIC
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} FILTER_TYPE_E;
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/* List of access_list. */
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typedef struct
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{
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struct _access_list *head;
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struct _access_list *tail;
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} access_list_list_t;
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/* Master structure of access_list. */
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typedef struct
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{
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/* List of access_list which name is number. */
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access_list_list_t num;
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/* List of access_list which name is string. */
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access_list_list_t str;
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/* Hook function which is executed when new access_list is added. */
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void (*add_hook)(struct _access_list *);
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/* Hook function which is executed when access_list is deleted. */
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void (*delete_hook)(struct _access_list *);
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} access_master_t;
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typedef struct
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{
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/* Cisco access-list */
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int extended;
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struct in_addr addr;
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struct in_addr addr_mask;
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struct in_addr mask;
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struct in_addr mask_mask;
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} filter_cisco_t;
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typedef struct
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{
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/* If this filter is "exact" match then this flag is set. */
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int exact;
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/* Prefix information. */
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prefix_t prefix;
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} filter_zebra_t;
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/* Filter element of access list */
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typedef struct _filter
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{
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/* For doubly linked list. */
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struct _filter *next;
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struct _filter *prev;
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/* Filter type information. */
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FILTER_TYPE_E type;
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/* Cisco access-list */
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int cisco;
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union
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{
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filter_cisco_t cfilter;
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filter_zebra_t zfilter;
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} u;
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} filter_t;
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/* Access list */
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typedef struct _access_list
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{
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char *name;
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char *remark;
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access_master_t *master;
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ACCESS_TYPE_E type;
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struct _access_list *next;
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struct _access_list *prev;
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filter_t *head;
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filter_t *tail;
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} access_list_t;
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typedef union
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{
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struct sockaddr sa;
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struct sockaddr_in sin;
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#ifdef HAVE_IPV6
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struct sockaddr_in6 sin6;
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#endif /* HAVE_IPV6 */
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} SOCKUNION_U;
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/* Exported macro ------------------------------------------------------------*/
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/* Extern global variables ---------------------------------------------------*/
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/* Extern functions ----------------------------------------------------------*/
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extern void prefix_free(prefix_t *p);
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extern prefix_ipv4_t *prefix_ipv4_new(void);
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#ifdef HAVE_IPV6
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extern prefix_ipv6_t *prefix_ipv6_new(void);
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#endif /* HAVE_IPV6 */
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extern access_list_t *access_list_lookup(uint16_t afi, const char *name);
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extern FILTER_TYPE_E access_list_apply(access_list_t *access, void *object);
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extern void masklen2ip(int masklen, struct in_addr *netmask);
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extern int prefix_match(const prefix_t *n, const prefix_t *p);
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extern int str2sockunion(const char *str, SOCKUNION_U *su);
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extern const char *sockunion2str(SOCKUNION_U *su, char *buf, size_t len);
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extern int sockunion_accept(int sock, SOCKUNION_U *su);
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extern int set_nonblocking(int fd);
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extern prefix_t *sockunion2hostprefix(const SOCKUNION_U *su);
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extern char *sockunion_su2str(SOCKUNION_U *su);
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extern int sockunion_stream_socket(SOCKUNION_U *su);
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extern int sockunion_reuseaddr(int sock);
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extern int sockunion_bind(int sock, SOCKUNION_U *su, unsigned short port, SOCKUNION_U *su_addr);
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extern int sockunion_ip_set(char *name, unsigned int addr);
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extern int sockunion_mask_set(char *name, unsigned int mask);
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extern int sockunion_gw_set(char *name, unsigned int gateway, unsigned int gateway_old);
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#endif
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/************************ (C) COPYRIGHT LandPower ***** END OF FILE ****************/
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