mirror of
https://github.com/jart/cosmopolitan.git
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248c6d54bb
Added necessary constants (DNS_TYPE_PTR, NI_NUMERICHOST etc.). Implementation of getnameinfo is similar to getaddrinfo, with internal functions: * ResolveDnsReverse: performs rDNS query and parses the PTR record * ResolveHostsReverse: reads /etc/hosts to map hostname to address Earlier, the HOSTS.txt would only need to be sorted at loading time, because the only kind of lookup was name -> address. Now since address -> name lookups are also possible, so the HostsTxt struct, the sorting method (and the related tests) was changed to reflect this.
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
#ifndef COSMOPOLITAN_LIBC_DNS_DNS_H_
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#define COSMOPOLITAN_LIBC_DNS_DNS_H_
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#include "libc/calls/weirdtypes.h"
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#include "libc/dns/resolvconf.h"
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#include "libc/sock/sock.h"
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#define DNS_PORT 53
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#define DNS_NAME_MAX 253
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#define DNS_LABEL_MAX 63
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#define EAI_SUCCESS 0
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#define EAI_BADFLAGS -1
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#define EAI_NONAME -2
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#define EAI_AGAIN -3
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#define EAI_FAIL -4
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#define EAI_NODATA -5
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#define EAI_FAMILY -6
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#define EAI_SOCKTYPE -7
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#define EAI_SERVICE -8
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#define EAI_ADDRFAMILY -9
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#define EAI_MEMORY -10
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#define EAI_OVERFLOW -12
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#define EAI_SYSTEM -11
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#define EAI_ALLDONE -103
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#define EAI_CANCELED -101
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#define EAI_IDN_ENCODE -105
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#define EAI_INPROGRESS -100
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#define EAI_INTR -104
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#define EAI_NOTCANCELED -102
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/* AI_* conforms to NT ABI */
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#define AI_PASSIVE 1
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#define AI_CANONNAME 2
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#define AI_NUMERICHOST 4
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#define AI_NUMERICSERV 8
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#define AI_ALL 0x0100
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#define AI_ADDRCONFIG 0x0400
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#define AI_V4MAPPED 0x0800
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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struct addrinfo {
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int32_t ai_flags; /* AI_XXX */
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int32_t ai_family; /* AF_INET */
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int32_t ai_socktype; /* SOCK_XXX */
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int32_t ai_protocol; /* IPPROTO_XXX */
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uint32_t ai_addrlen;
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union {
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struct sockaddr *ai_addr;
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struct sockaddr_in *ai_addr4;
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};
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char *ai_canonname /*[DNS_NAME_MAX + 1]*/;
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struct addrinfo *ai_next;
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};
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int getaddrinfo(const char *, const char *, const struct addrinfo *,
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struct addrinfo **) paramsnonnull((4));
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int freeaddrinfo(struct addrinfo *);
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int getnameinfo(const struct sockaddr *, socklen_t, char *, socklen_t, char *,
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socklen_t, int);
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const char *gai_strerror(int);
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int CompareDnsNames(const char *, const char *) paramsnonnull();
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int PascalifyDnsName(uint8_t *, size_t, const char *) paramsnonnull();
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int ResolveDns(const struct ResolvConf *, int, const char *, struct sockaddr *,
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uint32_t) paramsnonnull();
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int ResolveDnsReverse(const struct ResolvConf *resolvconf, int, const char *,
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char *, size_t) paramsnonnull();
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struct addrinfo *newaddrinfo(uint16_t);
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_DNS_DNS_H_ */
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