lws-network-helper.h

/*
 * libwebsockets - small server side websockets and web server implementation
 *
 * Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */
 
 
typedef union {
#if defined(LWS_WITH_IPV6)
        struct sockaddr_in6 sa6;
#endif
        struct sockaddr_in sa4;
} lws_sockaddr46;
 
LWS_VISIBLE LWS_EXTERN const char * LWS_WARN_UNUSED_RESULT
lws_canonical_hostname(struct lws_context *context);
 
LWS_VISIBLE LWS_EXTERN void
lws_get_peer_addresses(struct lws *wsi, lws_sockfd_type fd, char *name,
                       int name_len, char *rip, int rip_len);
 
LWS_VISIBLE LWS_EXTERN const char *
lws_get_peer_simple(struct lws *wsi, char *name, size_t namelen);
 
LWS_VISIBLE LWS_EXTERN const char *
lws_get_peer_simple_fd(lws_sockfd_type fd, char *name, size_t namelen);
 
#define LWS_ITOSA_USABLE        0
#define LWS_ITOSA_NOT_EXIST     -1
#define LWS_ITOSA_NOT_USABLE    -2
#define LWS_ITOSA_BUSY          -3 /* only returned by lws_socket_bind() on
                                        EADDRINUSE */
 
#if !defined(LWS_PLAT_FREERTOS) && !defined(LWS_PLAT_OPTEE)
 
LWS_VISIBLE LWS_EXTERN int
lws_interface_to_sa(int ipv6, const char *ifname, struct sockaddr_in *addr,
                    size_t addrlen);
#endif
 
LWS_VISIBLE LWS_EXTERN int
lws_sa46_compare_ads(const lws_sockaddr46 *sa46a, const lws_sockaddr46 *sa46b);
 
/*
 * lws_parse_numeric_address() - converts numeric ipv4 or ipv6 to byte address
 *
 * \param ads: the numeric ipv4 or ipv6 address string
 * \param result: result array
 * \param max_len: max length of result array
 *
 * Converts a 1.2.3.4 or 2001:abcd:123:: or ::ffff:1.2.3.4 formatted numeric
 * address into an array of network ordered byte address elements.
 *
 * Returns < 0 on error, else length of result set, either 4 or 16 for ipv4 /
 * ipv6.
 */
LWS_VISIBLE LWS_EXTERN int
lws_parse_numeric_address(const char *ads, uint8_t *result, size_t max_len);
 
/*
 * lws_sa46_parse_numeric_address() - converts numeric ipv4 or ipv6 to sa46
 *
 * \param ads: the numeric ipv4 or ipv6 address string
 * \param sa46: pointer to sa46 to set
 *
 * Converts a 1.2.3.4 or 2001:abcd:123:: or ::ffff:1.2.3.4 formatted numeric
 * address into an sa46, a union of sockaddr_in or sockaddr_in6 depending on
 * what kind of address was found.  sa46->sa4.sin_fmaily will be AF_INET if
 * ipv4, or AF_INET6 if ipv6.
 *
 * Returns 0 if the sa46 was set, else < 0 on error.
 */
LWS_VISIBLE LWS_EXTERN int
lws_sa46_parse_numeric_address(const char *ads, lws_sockaddr46 *sa46);
 
LWS_VISIBLE LWS_EXTERN int
lws_write_numeric_address(const uint8_t *ads, int size, char *buf, size_t len);
 
LWS_VISIBLE LWS_EXTERN int
lws_sa46_write_numeric_address(lws_sockaddr46 *sa46, char *buf, size_t len);