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Add libresolv from Musl Libc

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Locally modified to get nameservers from Windows Registry when
`\etc\resolv.conf` isn't defined.
This commit is contained in:
Justine Tunney 2023-12-08 20:03:03 -08:00
parent 8874a37abc
commit 1a96de6eda
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GPG key ID: BE714B4575D6E328
36 changed files with 2313 additions and 73 deletions
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52
third_party/musl/lookup.internal.h vendored Normal file
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#ifndef COSMOPOLITAN_THIRD_PARTY_MUSL_LOOKUP_INTERNAL_H_
#define COSMOPOLITAN_THIRD_PARTY_MUSL_LOOKUP_INTERNAL_H_
#include "libc/sock/struct/sockaddr6.h"
#include "libc/sock/struct/sockaddr.h"
#include "libc/dns/dns.h"
COSMOPOLITAN_C_START_
struct aibuf {
struct addrinfo ai;
union sa {
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
} sa;
volatile int lock[1];
short slot, ref;
};
struct address {
int family;
unsigned scopeid;
uint8_t addr[16];
int sortkey;
};
struct service {
uint16_t port;
unsigned char proto, socktype;
};
#define MAXNS 3
struct resolvconf {
struct address ns[MAXNS];
unsigned nns, attempts, ndots;
unsigned timeout;
};
/* The limit of 48 results is a non-sharp bound on the number of addresses
* that can fit in one 512-byte DNS packet full of v4 results and a second
* packet full of v6 results. Due to headers, the actual limit is lower. */
#define MAXADDRS 48
#define MAXSERVS 2
int __lookup_serv(struct service buf[static MAXSERVS], const char *name, int proto, int socktype, int flags);
int __lookup_name(struct address buf[static MAXADDRS], char canon[static 256], const char *name, int family, int flags);
int __lookup_ipliteral(struct address buf[static 1], const char *name, int family);
int __get_resolv_conf(struct resolvconf *, char *, size_t);
int __res_msend_rc(int, const unsigned char *const *, const int *, unsigned char *const *, int *, int, const struct resolvconf *);
int __dns_parse(const unsigned char *, int, int (*)(void *, int, const void *, int, const void *, int), void *);
COSMOPOLITAN_C_END_
#endif /* COSMOPOLITAN_THIRD_PARTY_MUSL_LOOKUP_INTERNAL_H_ */