Class: EventMachine::Udns::Resolver

Inherits:
Object
  • Object
show all
Defined in:
lib/em-udns/resolver.rb,
ext/em-udns.c

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Resolver

Returns a new instance of Resolver.

Raises:



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# File 'lib/em-udns/resolver.rb', line 4

def initialize
  raise UdnsError, @alloc_error if @alloc_error
  @queries = {}
  dns_open
end

Instance Method Details

#active ⇒ Object 



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# File 'ext/em-udns.c', line 156

VALUE Resolver_active(VALUE self)
{
  struct dns_ctx *dns_context = NULL;

  Data_Get_Struct(self, struct dns_ctx, dns_context);
  return INT2FIX(dns_active(dns_context));
}

#cancel(query) ⇒ Object 



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# File 'ext/em-udns.c', line 141

VALUE Resolver_cancel(VALUE self, VALUE query)
{
  VALUE queries;
  VALUE value;
  
  queries = rb_ivar_get(self, id_queries);
  if (TYPE(rb_hash_aref(queries, query)) == T_TRUE) {
    rb_hash_aset(queries, query, Qfalse);
    return Qtrue;
  }
  else
    return Qfalse;
}

#fd ⇒ Object 



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# File 'ext/em-udns.c', line 111

VALUE Resolver_fd(VALUE self)
{
  struct dns_ctx *dns_context = NULL;

  Data_Get_Struct(self, struct dns_ctx, dns_context);
  return INT2FIX(dns_sock(dns_context));
}

#ioevent ⇒ Object 



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# File 'ext/em-udns.c', line 120

VALUE Resolver_ioevent(VALUE self)
{
  struct dns_ctx *dns_context = NULL;
    
  Data_Get_Struct(self, struct dns_ctx, dns_context);
  dns_ioevent(dns_context, 0);
  return Qfalse;
}

#submit_A(rb_domain) ⇒ Object 



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# File 'ext/em-udns.c', line 383

VALUE Resolver_submit_A(VALUE self, VALUE rb_domain)
{
  struct dns_ctx *dns_context;
  char *domain;
  VALUE query;
  VALUE error;
  struct resolver_query *data;

  
  Data_Get_Struct(self, struct dns_ctx, dns_context);
  domain = StringValueCStr(rb_domain);
  query = rb_obj_alloc(cQuery);

  data = ALLOC(struct resolver_query);
  data->resolver = self;
  data->query = query;
  
  if (!dns_submit_a4(dns_context, domain, 0, dns_result_A_cb, (void *)data)) {
    error = get_dns_error(dns_context);
    xfree(data);
    rb_funcall(query, method_do_error, 1, error);
  }
  else {
    rb_hash_aset(rb_ivar_get(self, id_queries), query, Qtrue);
  }
  
  return query;
}

#submit_AAAA(rb_domain) ⇒ Object 



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# File 'ext/em-udns.c', line 413

VALUE Resolver_submit_AAAA(VALUE self, VALUE rb_domain)
{
  struct dns_ctx *dns_context;
  char *domain;
  VALUE query;
  VALUE error;
  struct resolver_query *data;

  Data_Get_Struct(self, struct dns_ctx, dns_context);
  domain = StringValueCStr(rb_domain);
  query = rb_obj_alloc(cQuery);

  data = ALLOC(struct resolver_query);
  data->resolver = self;
  data->query = query;

  if (!dns_submit_a6(dns_context, domain, 0, dns_result_AAAA_cb, (void *)data)) {
    error = get_dns_error(dns_context);
    xfree(data);
    rb_funcall(query, method_do_error, 1, error);
  }
  else {
    rb_hash_aset(rb_ivar_get(self, id_queries), query, Qtrue);
  }
  
  return query;
}

#submit_MX(rb_domain) ⇒ Object 



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# File 'ext/em-udns.c', line 499

VALUE Resolver_submit_MX(VALUE self, VALUE rb_domain)
{
  struct dns_ctx *dns_context;
  char *domain;
  VALUE query;
  VALUE error;
  struct resolver_query *data;

  Data_Get_Struct(self, struct dns_ctx, dns_context);
  domain = StringValueCStr(rb_domain);
  query = rb_obj_alloc(cQuery);

  data = ALLOC(struct resolver_query);
  data->resolver = self;
  data->query = query;

  if (!dns_submit_mx(dns_context, domain, 0, dns_result_MX_cb, (void *)data)) {
    error = get_dns_error(dns_context);
    xfree(data);
    rb_funcall(query, method_do_error, 1, error);
  }
  else {
    rb_hash_aset(rb_ivar_get(self, id_queries), query, Qtrue);
  }
  
  return query;
}

#submit_NAPTR(rb_domain) ⇒ Object 



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# File 'ext/em-udns.c', line 599

VALUE Resolver_submit_NAPTR(VALUE self, VALUE rb_domain)
{
  struct dns_ctx *dns_context;
  char *domain;
  VALUE query;
  VALUE error;
  struct resolver_query *data;

  Data_Get_Struct(self, struct dns_ctx, dns_context);
  domain = StringValueCStr(rb_domain);
  query = rb_obj_alloc(cQuery);

  data = ALLOC(struct resolver_query);
  data->resolver = self;
  data->query = query;

  if (!dns_submit_naptr(dns_context, domain, 0, dns_result_NAPTR_cb, (void *)data)) {
    error = get_dns_error(dns_context);
    xfree(data);
    rb_funcall(query, method_do_error, 1, error);
  }
  else {
    rb_hash_aset(rb_ivar_get(self, id_queries), query, Qtrue);
  }
  
  return query;
}

#submit_PTR(rb_ip) ⇒ Object 



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# File 'ext/em-udns.c', line 442

VALUE Resolver_submit_PTR(VALUE self, VALUE rb_ip)
{
  struct dns_ctx *dns_context;
  char *ip;
  VALUE query;
  VALUE error;
  struct resolver_query *data;
  struct in_addr addr;
  struct in6_addr addr6;

  Data_Get_Struct(self, struct dns_ctx, dns_context);
  ip = StringValueCStr(rb_ip);
  query = rb_obj_alloc(cQuery);

  data = ALLOC(struct resolver_query);
  data->resolver = self;
  data->query = query;

  switch(dns_pton(AF_INET, ip, &addr)) {
    /* It's valid IPv4. */
    case 1:
      if (!dns_submit_a4ptr(dns_context, &addr, dns_result_PTR_cb, (void *)data)) {
        error = get_dns_error(dns_context);
        xfree(data);
        rb_funcall(query, method_do_error, 1, error);
      }
      else {
        rb_hash_aset(rb_ivar_get(self, id_queries), query, Qtrue);
      }
      break;
    /* Invalid IPv4, let's try with IPv6. */
    case 0:
      switch(dns_pton(AF_INET6, ip, &addr6)) {
        /* It's valid IPv6. */
        case 1:
          if (!dns_submit_a6ptr(dns_context, &addr6, dns_result_PTR_cb, (void *)data)) {
            error = get_dns_error(dns_context);
            xfree(data);
            rb_funcall(query, method_do_error, 1, error);
          }
          else {
            rb_hash_aset(rb_ivar_get(self, id_queries), query, Qtrue);
          }
          break;
        /* Also an invalid IPv6 so the IP is invalid. */
        case 0:
          xfree(data);
          rb_funcall(query, method_do_error, 1, symbol_dns_error_badquery);
          break;
      }
      break;
  }

  return query;
}

#submit_SRV(*args) ⇒ Object 



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# File 'ext/em-udns.c', line 557

VALUE Resolver_submit_SRV(int argc, VALUE *argv, VALUE self)
{
  struct dns_ctx *dns_context;
  char *domain;
  char *service = NULL;
  char *protocol = NULL;
  VALUE query;
  VALUE error;
  struct resolver_query *data;

  if (argc == 1 && TYPE(argv[0]) == T_STRING);
  else if (argc == 3 && TYPE(argv[0]) == T_STRING &&
           TYPE(argv[1]) == T_STRING && TYPE(argv[2]) == T_STRING) {
    service = StringValueCStr(argv[1]);
    protocol = StringValueCStr(argv[2]);
  }
  else if (argc == 3 && TYPE(argv[0]) == T_STRING &&
           TYPE(argv[1]) == T_NIL && TYPE(argv[2]) == T_NIL);
  else
    rb_raise(rb_eArgError, "arguments must be `domain' or `domain',`service',`protocol'");

  Data_Get_Struct(self, struct dns_ctx, dns_context);
  domain = StringValueCStr(argv[0]);
  query = rb_obj_alloc(cQuery);
  
  data = ALLOC(struct resolver_query);
  data->resolver = self;
  data->query = query;
  
  if (!dns_submit_srv(dns_context, domain, service, protocol, 0, dns_result_SRV_cb, (void *)data)) {
    error = get_dns_error(dns_context);
    xfree(data);
    rb_funcall(query, method_do_error, 1, error);
  }
  else {
    rb_hash_aset(rb_ivar_get(self, id_queries), query, Qtrue);
  }
  
  return query;
}

#submit_TXT(rb_domain) ⇒ Object 



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# File 'ext/em-udns.c', line 528

VALUE Resolver_submit_TXT(VALUE self, VALUE rb_domain)
{
  struct dns_ctx *dns_context;
  char *domain;
  VALUE query;
  VALUE error;
  struct resolver_query *data;

  Data_Get_Struct(self, struct dns_ctx, dns_context);
  domain = StringValueCStr(rb_domain);
  query = rb_obj_alloc(cQuery);

  data = ALLOC(struct resolver_query);
  data->resolver = self;
  data->query = query;

  if (!dns_submit_txt(dns_context, domain, DNS_C_IN, 0, dns_result_TXT_cb, (void *)data)) {
    error = get_dns_error(dns_context);
    xfree(data);
    rb_funcall(query, method_do_error, 1, error);
  }
  else {
    rb_hash_aset(rb_ivar_get(self, id_queries), query, Qtrue);
  }
  
  return query;
}