262 lines
8.6 KiB
C
262 lines
8.6 KiB
C
|
/*
|
||
|
|
* libwebsockets - small server side websockets and web server implementation
|
||
|
|
*
|
||
|
|
* Copyright (C) 2010 - 2023 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/** \defgroup net Network related helper APIs
|
||
|
|
* ##Network related helper APIs
|
||
|
|
*
|
||
|
|
* These wrap miscellaneous useful network-related functions
|
||
|
|
*/
|
||
|
|
///@{
|
||
|
|
|
||
|
|
#if defined(LWS_ESP_PLATFORM)
|
||
|
|
#include <lwip/sockets.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* cope with large amounts of route information */
|
||
|
|
typedef uint16_t lws_route_uidx_t;
|
||
|
|
|
||
|
|
typedef struct lws_dns_score {
|
||
|
|
uint8_t precedence;
|
||
|
|
uint8_t label;
|
||
|
|
} lws_dns_score_t;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This represents an entry in the system routing table
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef struct lws_route {
|
||
|
|
lws_dll2_t list;
|
||
|
|
|
||
|
|
lws_sockaddr46 src;
|
||
|
|
lws_sockaddr46 dest;
|
||
|
|
lws_sockaddr46 gateway;
|
||
|
|
|
||
|
|
struct lws_route *source; /* when used as lws_dns_sort_t */
|
||
|
|
lws_dns_score_t score; /* when used as lws_dns_sort_t */
|
||
|
|
|
||
|
|
int if_idx;
|
||
|
|
int priority;
|
||
|
|
int ifa_flags; /* if source_ads */
|
||
|
|
|
||
|
|
lws_route_uidx_t uidx; /* unique index for this route */
|
||
|
|
|
||
|
|
uint8_t proto;
|
||
|
|
uint8_t dest_len;
|
||
|
|
uint8_t src_len;
|
||
|
|
uint8_t scope; /* if source_ads */
|
||
|
|
uint8_t af; /* if source_ads */
|
||
|
|
|
||
|
|
uint8_t source_ads:1;
|
||
|
|
} lws_route_t;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* We reuse the route object as the dns sort granule, so there's only one
|
||
|
|
* struct needs to know all the gnarly ipv6 details
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef lws_route_t lws_dns_sort_t;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* lws_canonical_hostname() - returns this host's hostname
|
||
|
|
*
|
||
|
|
* This is typically used by client code to fill in the host parameter
|
||
|
|
* when making a client connection. You can only call it after the context
|
||
|
|
* has been created.
|
||
|
|
*
|
||
|
|
* \param context: Websocket context
|
||
|
|
*/
|
||
|
|
LWS_VISIBLE LWS_EXTERN const char * LWS_WARN_UNUSED_RESULT
|
||
|
|
lws_canonical_hostname(struct lws_context *context);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* lws_get_peer_addresses() - Get client address information
|
||
|
|
* \param wsi: Local struct lws associated with
|
||
|
|
* \param fd: Connection socket descriptor
|
||
|
|
* \param name: Buffer to take client address name
|
||
|
|
* \param name_len: Length of client address name buffer
|
||
|
|
* \param rip: Buffer to take client address IP dotted quad
|
||
|
|
* \param rip_len: Length of client address IP buffer
|
||
|
|
*
|
||
|
|
* This function fills in name and rip with the name and IP of
|
||
|
|
* the client connected with socket descriptor fd. Names may be
|
||
|
|
* truncated if there is not enough room. If either cannot be
|
||
|
|
* determined, they will be returned as valid zero-length strings.
|
||
|
|
*/
|
||
|
|
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_get_peer_simple() - Get client address information without RDNS
|
||
|
|
*
|
||
|
|
* \param wsi: Local struct lws associated with
|
||
|
|
* \param name: Buffer to take client address name
|
||
|
|
* \param namelen: Length of client address name buffer
|
||
|
|
*
|
||
|
|
* This provides a 123.123.123.123 type IP address in name from the
|
||
|
|
* peer that has connected to wsi
|
||
|
|
*/
|
||
|
|
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_interface_to_sa() - Convert interface name or IP to sockaddr struct
|
||
|
|
*
|
||
|
|
* \param ipv6: Allow IPV6 addresses
|
||
|
|
* \param ifname: Interface name or IP
|
||
|
|
* \param addr: struct sockaddr_in * to be written
|
||
|
|
* \param addrlen: Length of addr
|
||
|
|
*
|
||
|
|
* This converts a textual network interface name to a sockaddr usable by
|
||
|
|
* other network functions.
|
||
|
|
*
|
||
|
|
* If the network interface doesn't exist, it will return LWS_ITOSA_NOT_EXIST.
|
||
|
|
*
|
||
|
|
* If the network interface is not usable, eg ethernet cable is removed, it
|
||
|
|
* may logically exist but not have any IP address. As such it will return
|
||
|
|
* LWS_ITOSA_NOT_USABLE.
|
||
|
|
*
|
||
|
|
* If the network interface exists and is usable, it will return
|
||
|
|
* LWS_ITOSA_USABLE.
|
||
|
|
*/
|
||
|
|
LWS_VISIBLE LWS_EXTERN int
|
||
|
|
lws_interface_to_sa(int ipv6, const char *ifname, struct sockaddr_in *addr,
|
||
|
|
size_t addrlen);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/**
|
||
|
|
* lws_sa46_compare_ads() - checks if two sa46 have the same address
|
||
|
|
*
|
||
|
|
* \param sa46a: first
|
||
|
|
* \param sa46b: second
|
||
|
|
*
|
||
|
|
* Returns 0 if the address family is INET or INET6 and the address is the same,
|
||
|
|
* or if the AF is the same but not INET or INET6, otherwise nonzero.
|
||
|
|
*/
|
||
|
|
LWS_VISIBLE LWS_EXTERN int
|
||
|
|
lws_sa46_compare_ads(const lws_sockaddr46 *sa46a, const lws_sockaddr46 *sa46b);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* lws_sa46_on_net() - checks if an sa46 is on the subnet represented by another
|
||
|
|
*
|
||
|
|
* \param sa46a: first
|
||
|
|
* \param sa46_net: network
|
||
|
|
* \param net_len: length of network non-mask
|
||
|
|
*
|
||
|
|
* Returns 0 if sa46a belongs on network sa46_net/net_len
|
||
|
|
*
|
||
|
|
* If there is an ipv4 / v6 mismatch between the ip and the net, the ipv4
|
||
|
|
* address is promoted to ::ffff:x.x.x.x before the comparison.
|
||
|
|
*/
|
||
|
|
LWS_VISIBLE LWS_EXTERN int
|
||
|
|
lws_sa46_on_net(const lws_sockaddr46 *sa46a, const lws_sockaddr46 *sa46_net,
|
||
|
|
int net_len);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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_write_numeric_address() - convert network byte order ads to text
|
||
|
|
*
|
||
|
|
* \param ads: network byte order address array
|
||
|
|
* \param size: number of bytes valid in ads
|
||
|
|
* \param buf: result buffer to take text format
|
||
|
|
* \param len: max size of text buffer
|
||
|
|
*
|
||
|
|
* Converts an array of network-ordered byte address elements to a textual
|
||
|
|
* representation of the numeric address, like "1.2.3.4" or "::1". Returns the
|
||
|
|
* number of chars written into buf, else < 0. ipv6 only supported with
|
||
|
|
* LWS_IPV6=1 at cmake.
|
||
|
|
*/
|
||
|
|
LWS_VISIBLE LWS_EXTERN int
|
||
|
|
lws_write_numeric_address(const uint8_t *ads, int size, char *buf, size_t len);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* lws_sa46_write_numeric_address() - convert sa46 ads to textual numeric ads
|
||
|
|
*
|
||
|
|
* \param sa46: the sa46 whose address to show
|
||
|
|
* \param buf: result buffer to take text format
|
||
|
|
* \param len: max size of text buffer
|
||
|
|
*
|
||
|
|
* Converts the ipv4 or ipv6 address in an lws_sockaddr46 to a textual
|
||
|
|
* representation of the numeric address, like "1.2.3.4" or "::1". Returns the
|
||
|
|
* number of chars written into buf, else < 0. ipv6 only supported with
|
||
|
|
* LWS_IPV6=1 at cmake.
|
||
|
|
*/
|
||
|
|
LWS_VISIBLE LWS_EXTERN int
|
||
|
|
lws_sa46_write_numeric_address(lws_sockaddr46 *sa46, char *buf, size_t len);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* lws_parse_mac() - convert XX:XX:XX:XX:XX:XX to 6-byte MAC address
|
||
|
|
*
|
||
|
|
* \param ads: mac address as XX:XX:XX:XX:XX:XX string
|
||
|
|
* \param result_6_bytes: result buffer to take 6 bytes
|
||
|
|
*
|
||
|
|
* Converts a string representation of a 6-byte hex mac address to a 6-byte
|
||
|
|
* array.
|
||
|
|
*/
|
||
|
|
LWS_VISIBLE LWS_EXTERN int
|
||
|
|
lws_parse_mac(const char *ads, uint8_t *result_6_bytes);
|
||
|
|
|
||
|
|
///@}
|