mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-03-02 15:08:41 +00:00
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.
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
#ifndef COSMOPOLITAN_LIBC_DNS_HOSTSTXT_H_
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#define COSMOPOLITAN_LIBC_DNS_HOSTSTXT_H_
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#include "libc/sock/sock.h"
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#include "libc/stdio/stdio.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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struct HostsTxtEntry {
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uint8_t ip[4]; /* inet_ntop(AF_INET, he->ip, buf, size) */
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uint32_t name; /* &ht->strings.p[he->name] */
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uint32_t canon; /* &ht->strings.p[he->canon] */
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};
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struct HostsTxtEntries {
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size_t i, n;
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struct HostsTxtEntry *p;
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};
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struct HostsTxtStrings {
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size_t i, n;
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char *p;
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};
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#define HOSTSTXT_NOT_SORTED 0
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#define HOSTSTXT_SORTEDBYNAME 1
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#define HOSTSTXT_SORTEDBYADDR 2
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struct HostsTxt {
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int sorted_by;
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struct HostsTxtEntries entries;
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struct HostsTxtStrings strings;
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};
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const struct HostsTxt *GetHostsTxt(void) returnsnonnull;
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void FreeHostsTxt(struct HostsTxt **) paramsnonnull();
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int ParseHostsTxt(struct HostsTxt *, FILE *) paramsnonnull();
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void SortHostsTxt(struct HostsTxt *, int) paramsnonnull();
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int ResolveHostsTxt(const struct HostsTxt *, int, const char *,
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struct sockaddr *, uint32_t, const char **)
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paramsnonnull((1, 3));
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int ResolveHostsReverse(const struct HostsTxt *, int, const uint8_t *, char *,
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size_t);
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_DNS_HOSTSTXT_H_ */
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