getaddrinfo.c File Reference

#include "uv.h"
#include "internal.h"
#include "idna.h"
#include <errno.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <net/if.h>
#include <netdb.h>

Go to the source code of this file.

Macros
#define	_GNU_SOURCE

Functions
int	uv__getaddrinfo_translate_error (int sys_err)
static void	uv__getaddrinfo_work (struct uv__work *w)
static void	uv__getaddrinfo_done (struct uv__work *w, int status)
int	uv_getaddrinfo (uv_loop_t *loop, uv_getaddrinfo_t *req, uv_getaddrinfo_cb cb, const char *hostname, const char *service, const struct addrinfo *hints)
void	uv_freeaddrinfo (struct addrinfo *ai)
int	uv_if_indextoname (unsigned int ifindex, char *buffer, size_t *size)
int	uv_if_indextoiid (unsigned int ifindex, char *buffer, size_t *size)

Macro Definition Documentation

_GNU_SOURCE

#define _GNU_SOURCE

Definition at line 25 of file getaddrinfo.c.

Function Documentation

uv__getaddrinfo_done()

static void uv__getaddrinfo_done ( struct uv__work *  w, int  status  )

static

Definition at line 111 of file getaddrinfo.c.

                                                                 {
  uv_getaddrinfo_t* req;
 
  req = container_of(w, uv_getaddrinfo_t, work_req);
  uv__req_unregister(req->loop, req);
 
  /* See initialization in uv_getaddrinfo(). */
  if (req->hints)
    uv__free(req->hints);
  else if (req->service)
    uv__free(req->service);
  else if (req->hostname)
    uv__free(req->hostname);
  else
    assert(0);
 
  req->hints = NULL;
  req->service = NULL;
  req->hostname = NULL;
 
  if (status == UV_ECANCELED) {
    assert(req->retcode == 0);
    req->retcode = UV_EAI_CANCELED;
  }
 
  if (req->cb)
    req->cb(req, req->retcode, req->addrinfo);
}

References assert(), container_of, NULL, req, status, uv__free(), uv__req_unregister, and w.

Referenced by uv_getaddrinfo().

uv__getaddrinfo_translate_error()

int uv__getaddrinfo_translate_error

(

int

sys_err

)

Definition at line 42 of file getaddrinfo.c.

                                                 {
  switch (sys_err) {
  case 0: return 0;
#if defined(EAI_ADDRFAMILY)
  case EAI_ADDRFAMILY: return UV_EAI_ADDRFAMILY;
#endif
#if defined(EAI_AGAIN)
  case EAI_AGAIN: return UV_EAI_AGAIN;
#endif
#if defined(EAI_BADFLAGS)
  case EAI_BADFLAGS: return UV_EAI_BADFLAGS;
#endif
#if defined(EAI_BADHINTS)
  case EAI_BADHINTS: return UV_EAI_BADHINTS;
#endif
#if defined(EAI_CANCELED)
  case EAI_CANCELED: return UV_EAI_CANCELED;
#endif
#if defined(EAI_FAIL)
  case EAI_FAIL: return UV_EAI_FAIL;
#endif
#if defined(EAI_FAMILY)
  case EAI_FAMILY: return UV_EAI_FAMILY;
#endif
#if defined(EAI_MEMORY)
  case EAI_MEMORY: return UV_EAI_MEMORY;
#endif
#if defined(EAI_NODATA)
  case EAI_NODATA: return UV_EAI_NODATA;
#endif
#if defined(EAI_NONAME)
# if !defined(EAI_NODATA) || EAI_NODATA != EAI_NONAME
  case EAI_NONAME: return UV_EAI_NONAME;
# endif
#endif
#if defined(EAI_OVERFLOW)
  case EAI_OVERFLOW: return UV_EAI_OVERFLOW;
#endif
#if defined(EAI_PROTOCOL)
  case EAI_PROTOCOL: return UV_EAI_PROTOCOL;
#endif
#if defined(EAI_SERVICE)
  case EAI_SERVICE: return UV_EAI_SERVICE;
#endif
#if defined(EAI_SOCKTYPE)
  case EAI_SOCKTYPE: return UV_EAI_SOCKTYPE;
#endif
#if defined(EAI_SYSTEM)
  case EAI_SYSTEM: return UV__ERR(errno);
#endif
  }
  assert(!"unknown EAI_* error code");
  abort();
#ifndef __SUNPRO_C
  return 0;  /* Pacify compiler. */
#endif
}

References assert(), and UV__ERR.

Referenced by uv__getaddrinfo_work(), and uv__getnameinfo_work().

uv__getaddrinfo_work()

static void uv__getaddrinfo_work ( struct uv__work *  w )

static

Definition at line 101 of file getaddrinfo.c.

                                                     {
  uv_getaddrinfo_t* req;
  int err;
 
  req = container_of(w, uv_getaddrinfo_t, work_req);
  err = getaddrinfo(req->hostname, req->service, req->hints, &req->addrinfo);
  req->retcode = uv__getaddrinfo_translate_error(err);
}

References container_of, err, req, uv__getaddrinfo_translate_error(), and w.

Referenced by uv_getaddrinfo().

uv_freeaddrinfo()

void uv_freeaddrinfo

(

struct addrinfo *

ai

)

Definition at line 223 of file getaddrinfo.c.

                                          {
  if (ai)
    freeaddrinfo(ai);
}

uv_getaddrinfo()

int uv_getaddrinfo	(	uv_loop_t *	loop,
		uv_getaddrinfo_t *	req,
		uv_getaddrinfo_cb	cb,
		const char *	hostname,
		const char *	service,
		const struct addrinfo *	hints
	)

Definition at line 141 of file getaddrinfo.c.

                                                 {
  char hostname_ascii[256];
  size_t hostname_len;
  size_t service_len;
  size_t hints_len;
  size_t len;
  char* buf;
  long rc;
 
  if (req == NULL || (hostname == NULL && service == NULL))
    return UV_EINVAL;
 
  /* FIXME(bnoordhuis) IDNA does not seem to work z/OS,
   * probably because it uses EBCDIC rather than ASCII.
   */
#ifdef __MVS__
  (void) &hostname_ascii;
#else
  if (hostname != NULL) {
    rc = uv__idna_toascii(hostname,
                          hostname + strlen(hostname),
                          hostname_ascii,
                          hostname_ascii + sizeof(hostname_ascii));
    if (rc < 0)
      return rc;
    hostname = hostname_ascii;
  }
#endif
 
  hostname_len = hostname ? strlen(hostname) + 1 : 0;
  service_len = service ? strlen(service) + 1 : 0;
  hints_len = hints ? sizeof(*hints) : 0;
  buf = uv__malloc(hostname_len + service_len + hints_len);
 
  if (buf == NULL)
    return UV_ENOMEM;
 
  uv__req_init(loop, req, UV_GETADDRINFO);
  req->loop = loop;
  req->cb = cb;
  req->addrinfo = NULL;
  req->hints = NULL;
  req->service = NULL;
  req->hostname = NULL;
  req->retcode = 0;
 
  /* order matters, see uv_getaddrinfo_done() */
  len = 0;
 
  if (hints) {
    req->hints = memcpy(buf + len, hints, sizeof(*hints));
    len += sizeof(*hints);
  }
 
  if (service) {
    req->service = memcpy(buf + len, service, service_len);
    len += service_len;
  }
 
  if (hostname)
    req->hostname = memcpy(buf + len, hostname, hostname_len);
 
  if (cb) {
    uv__work_submit(loop,
                    &req->work_req,
                    UV__WORK_SLOW_IO,
                    uv__getaddrinfo_work,
                    uv__getaddrinfo_done);
    return 0;
  } else {
    uv__getaddrinfo_work(&req->work_req);
    uv__getaddrinfo_done(&req->work_req, 0);
    return req->retcode;
  }
}

uv_if_indextoiid()

int uv_if_indextoiid	(	unsigned int	ifindex,
		char *	buffer,
		size_t *	size
	)

Definition at line 253 of file getaddrinfo.c.

                                                                       {
  return uv_if_indextoname(ifindex, buffer, size);
}

uv_if_indextoname()

int uv_if_indextoname	(	unsigned int	ifindex,
		char *	buffer,
		size_t *	size
	)

Definition at line 229 of file getaddrinfo.c.

                                                                        {
  char ifname_buf[UV_IF_NAMESIZE];
  size_t len;
 
  if (buffer == NULL || size == NULL || *size == 0)
    return UV_EINVAL;
 
  if (if_indextoname(ifindex, ifname_buf) == NULL)
    return UV__ERR(errno);
 
  len = strnlen(ifname_buf, sizeof(ifname_buf));
 
  if (*size <= len) {
    *size = len + 1;
    return UV_ENOBUFS;
  }
 
  memcpy(buffer, ifname_buf, len);
  buffer[len] = '\0';
  *size = len;
 
  return 0;
}

Referenced by uv_if_indextoiid().