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91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
#ifndef LLARP_DNS_H_
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#define LLARP_DNS_H_
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#include <llarp/ev.h>
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#include <sys/types.h> // for uint & ssize_t
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/**
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* dns.h
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*
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* dns client/server
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*/
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#define DNC_BUF_SIZE 512
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struct dns_query
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{
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uint16_t length;
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char *url;
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unsigned char request[DNC_BUF_SIZE];
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uint16_t reqType;
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};
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struct dns_client_request;
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typedef void (*resolve_dns_hook_func)(dns_client_request *request,
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struct sockaddr *);
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struct dns_client_request
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{
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/// sock type
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void *sock;
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/// customizeable (used for outer request)
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void *user;
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/// storage
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dns_query query;
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/// hook
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resolve_dns_hook_func resolved;
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};
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// forward declare
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struct dns_context;
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/// returns true if the dns query was intercepted
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typedef bool (*intercept_query_hook)(struct dns_context *, const dns_query *);
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/// context for dns subsystem
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struct dns_context
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{
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/// populated by llarp_dns_init
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struct llarp_udp_io udp;
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/// set by caller
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void *user;
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/// hook function for intercepting dns requests
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intercept_query_hook intercept;
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};
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struct sockaddr *
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resolveHost(const char *url);
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/// initialize dns subsystem and bind socket
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/// returns true on bind success otherwise returns false
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bool
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llarp_dns_init(struct dns_context *dns, struct llarp_ev_loop *loop,
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const char *addr, uint16_t port);
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/// async resolve hostname
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bool
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llarp_resolve_host(struct dns_context *dns, const char *url,
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resolve_dns_hook_func resolved, void *user);
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/*
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// XXX: these should be internal and not exposed
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void
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llarp_handle_recvfrom(struct llarp_udp_io *udp, const struct sockaddr *saddr,
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const void *buf, ssize_t sz);
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void
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raw_handle_recvfrom(int *sockfd, const struct sockaddr *saddr, const void
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*buf, ssize_t sz);
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif
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