libwebsockets
Lightweight C library for HTML5 websockets
lws-network-helper.h
1/*
2 * libwebsockets - small server side websockets and web server implementation
3 *
4 * Copyright (C) 2010 - 2020 Andy Green <andy@warmcat.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
31
32#if defined(LWS_ESP_PLATFORM)
33#include <lwip/sockets.h>
34#endif
35
36/* cope with large amounts of route information */
37typedef uint16_t lws_route_uidx_t;
38
39typedef struct lws_dns_score {
40 uint8_t precedence;
41 uint8_t label;
43
44/*
45 * This represents an entry in the system routing table
46 */
47
48typedef struct lws_route {
49 lws_dll2_t list;
50
52 lws_sockaddr46 dest;
53 lws_sockaddr46 gateway;
54
55 struct lws_route *source; /* when used as lws_dns_sort_t */
56 lws_dns_score_t score; /* when used as lws_dns_sort_t */
57
58 int if_idx;
59 int priority;
60 int ifa_flags; /* if source_ads */
61
62 lws_route_uidx_t uidx; /* unique index for this route */
63
64 uint8_t proto;
65 uint8_t dest_len;
66 uint8_t src_len;
67 uint8_t scope; /* if source_ads */
68 uint8_t af; /* if source_ads */
69
70 uint8_t source_ads:1;
72
73/*
74 * We reuse the route object as the dns sort granule, so there's only one
75 * struct needs to know all the gnarly ipv6 details
76 */
77
79
89LWS_VISIBLE LWS_EXTERN const char * LWS_WARN_UNUSED_RESULT
90lws_canonical_hostname(struct lws_context *context);
91
106LWS_VISIBLE LWS_EXTERN void
107lws_get_peer_addresses(struct lws *wsi, lws_sockfd_type fd, char *name,
108 int name_len, char *rip, int rip_len);
109
120LWS_VISIBLE LWS_EXTERN const char *
121lws_get_peer_simple(struct lws *wsi, char *name, size_t namelen);
122
123LWS_VISIBLE LWS_EXTERN const char *
124lws_get_peer_simple_fd(lws_sockfd_type fd, char *name, size_t namelen);
125
126#define LWS_ITOSA_USABLE 0
127#define LWS_ITOSA_NOT_EXIST -1
128#define LWS_ITOSA_NOT_USABLE -2
129#define LWS_ITOSA_BUSY -3 /* only returned by lws_socket_bind() on
130 EADDRINUSE */
131
132#if !defined(LWS_PLAT_FREERTOS) && !defined(LWS_PLAT_OPTEE)
153LWS_VISIBLE LWS_EXTERN int
154lws_interface_to_sa(int ipv6, const char *ifname, struct sockaddr_in *addr,
155 size_t addrlen);
156#endif
157
167LWS_VISIBLE LWS_EXTERN int
168lws_sa46_compare_ads(const lws_sockaddr46 *sa46a, const lws_sockaddr46 *sa46b);
169
182LWS_VISIBLE LWS_EXTERN int
183lws_sa46_on_net(const lws_sockaddr46 *sa46a, const lws_sockaddr46 *sa46_net,
184 int net_len);
185
186/*
187 * lws_parse_numeric_address() - converts numeric ipv4 or ipv6 to byte address
188 *
189 * \param ads: the numeric ipv4 or ipv6 address string
190 * \param result: result array
191 * \param max_len: max length of result array
192 *
193 * Converts a 1.2.3.4 or 2001:abcd:123:: or ::ffff:1.2.3.4 formatted numeric
194 * address into an array of network ordered byte address elements.
195 *
196 * Returns < 0 on error, else length of result set, either 4 or 16 for ipv4 /
197 * ipv6.
198 */
199LWS_VISIBLE LWS_EXTERN int
200lws_parse_numeric_address(const char *ads, uint8_t *result, size_t max_len);
201
202/*
203 * lws_sa46_parse_numeric_address() - converts numeric ipv4 or ipv6 to sa46
204 *
205 * \param ads: the numeric ipv4 or ipv6 address string
206 * \param sa46: pointer to sa46 to set
207 *
208 * Converts a 1.2.3.4 or 2001:abcd:123:: or ::ffff:1.2.3.4 formatted numeric
209 * address into an sa46, a union of sockaddr_in or sockaddr_in6 depending on
210 * what kind of address was found. sa46->sa4.sin_fmaily will be AF_INET if
211 * ipv4, or AF_INET6 if ipv6.
212 *
213 * Returns 0 if the sa46 was set, else < 0 on error.
214 */
215LWS_VISIBLE LWS_EXTERN int
216lws_sa46_parse_numeric_address(const char *ads, lws_sockaddr46 *sa46);
217
231LWS_VISIBLE LWS_EXTERN int
232lws_write_numeric_address(const uint8_t *ads, int size, char *buf, size_t len);
233
246LWS_VISIBLE LWS_EXTERN int
247lws_sa46_write_numeric_address(lws_sockaddr46 *sa46, char *buf, size_t len);
248
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_WARN_UNUSED_RESULT lws_canonical_hostname(struct lws_context *context)
LWS_VISIBLE LWS_EXTERN int lws_interface_to_sa(int ipv6, const char *ifname, struct sockaddr_in *addr, size_t addrlen)
LWS_VISIBLE LWS_EXTERN int lws_sa46_on_net(const lws_sockaddr46 *sa46a, const lws_sockaddr46 *sa46_net, int net_len)
LWS_VISIBLE LWS_EXTERN int lws_sa46_compare_ads(const lws_sockaddr46 *sa46a, const lws_sockaddr46 *sa46b)
LWS_VISIBLE LWS_EXTERN int lws_write_numeric_address(const uint8_t *ads, int size, char *buf, size_t len)
LWS_VISIBLE LWS_EXTERN const char * lws_get_peer_simple(struct lws *wsi, char *name, size_t namelen)
LWS_VISIBLE LWS_EXTERN int lws_sa46_write_numeric_address(lws_sockaddr46 *sa46, char *buf, size_t len)
Definition: lws-dll2.h:197
Definition: lws-network-helper.h:39
Definition: lws-network-helper.h:48
Definition: lws-adopt.h:86