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libc: Add gethostbyname(). Untested on initial commit

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This commit is contained in:
Gregory Nutt
2015-07-08 13:40:52 -06:00
parent f94fe747ae
commit 1b1e34e1d5
7 changed files with 1007 additions and 31 deletions
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include/netdb.h
+65 -31
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@@ -156,6 +156,27 @@
#define EAI_SYSTEM 8
#define EAI_OVERFLOW 9
/* h_errno values that may be returned by gethosbyname(), gethostbyname_r(),
* gethostbyaddr(), or gethostbyaddr_r()
*
* HOST_NOT_FOUND - No such host is known.
*
* NO_DATA - The server recognized the request and the name, but no
* address is available. Another type of request to the name server
* for the domain might return an answer.
*
* NO_RECOVERY - An unexpected server failure occurred which cannot be
* recovered.
*
* TRY_AGAIN - A temporary and possibly transient error occurred, such as
* a failure of a server to respond.
*/
#define HOST_NOT_FOUND 1
#define NO_DATA 2
#define NO_RECOVERY 3
#define TRY_AGAIN 4
/****************************************************************************
* Public Types
****************************************************************************/
@@ -215,7 +236,7 @@ struct addrinfo
FAR struct sockaddr *ai_addr; /* Socket address of socket. */
FAR char *ai_canonname; /* Canonical name of service location. */
sFAR truct addrinfo *ai_next; /* Pointer to next in list. */
FAR struct addrinfo *ai_next; /* Pointer to next in list. */
};
/****************************************************************************
@@ -235,46 +256,59 @@ extern "C"
* macro or an identifier declared with external linkage.
*/
/* To be provided */
/* REVISIT: This should at least be per-task? */
EXTERN int h_errno;
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef CONFIG_LIB_NETDB
#if 0 /* None of these are yet supported */
void endhostent(void);
void endnetent(void);
void endprotoent(void);
void endservent(void);
void freeaddrinfo(FAR struct addrinfo *);
const char *gai_strerror(int);
int getaddrinfo(FAR const char *restrict,
FAR const char *restrict,
FAR const struct addrinfo *restrict,
FAR struct addrinfo **restrict);
struct hostent *gethostbyaddr(FAR const void *, socklen_t, int);
struct hostent *gethostbyname(FAR const char *);
struct hostent *gethostent(void);
int getnameinfo(FAR const struct sockaddr *restrict, socklen_t,
FAR char *restrict, socklen_t, FAR char *restrict,
socklen_t, int);
struct netent *getnetbyaddr(uint32_t, int);
struct netent *getnetbyname(FAR const char *);
struct netent *getnetent(void);
struct protoent *getprotobyname(FAR const char *);
struct protoent *getprotobynumber(int);
struct protoent *getprotoent(void);
struct servent *getservbyname(FAR const char *, FAR const char *);
struct servent *getservbyport(int, FAR const char *);
struct servent *getservent(void);
void sethostent(int);
void setnetent(int);
void setprotoent(int);
void setservent(int);
void endhostent(void);
void endnetent(void);
void endprotoent(void);
void endservent(void);
void freeaddrinfo(FAR struct addrinfo *);
FAR const char *gai_strerror(int);
int getaddrinfo(FAR const char *restrict,
FAR const char *restrict,
FAR const struct addrinfo *restrict,
FAR struct addrinfo **restrict);
FAR struct hostent *gethostbyaddr(FAR const void *, socklen_t, int);
#endif
FAR struct hostent *gethostbyname(FAR const char *);
#if 0 /* None of these are yet supported */
FAR struct hostent *gethostent(void);
int getnameinfo(FAR const struct sockaddr *restrict, socklen_t,
FAR char *restrict, socklen_t, FAR char *restrict,
socklen_t, int);
FAR struct netent *getnetbyaddr(uint32_t, int);
FAR struct netent *getnetbyname(FAR const char *);
FAR struct netent *getnetent(void);
FAR struct protoent *getprotobyname(FAR const char *);
FAR struct protoent *getprotobynumber(int);
FAR struct protoent *getprotoent(void);
FAR struct servent *getservbyname(FAR const char *, FAR const char *);
FAR struct servent *getservbyport(int, FAR const char *);
FAR struct servent *getservent(void);
void sethostent(int);
void setnetent(int);
void setprotoent(int);
void setservent(int);
#endif /* None of these are yet supported */
/* Non-standard interfaces similar to Glibc 2 interfaces */
int gethostbyname_r(FAR const char *name, FAR struct hostent *host,
FAR char *buf, size_t buflen, int *h_errnop);
#endif /* CONFIG_LIB_NETDB */
#undef EXTERN
#ifdef __cplusplus
}