// A wrapper function to send a query and print the output onto stderr
//
int
sendquery(val_context_t * context, const char *desc, char * name,
int class_h, int type_h, u_int32_t flags,
const int *result_ar, int trusted_only,
struct val_response *resp)
{
int ret_val;
struct val_result_chain *results = NULL;
int err = 0;
struct timeval start;
if ((NULL == desc) || (NULL == name) || (NULL == result_ar) || (resp == NULL))
return -1;
fprintf(stderr, "%s: ****START**** \n", desc);
gettimeofday(&start, NULL);
ret_val =
val_resolve_and_check(context, name, class_h, type_h, flags, &results);
if (ret_val == VAL_NO_ERROR) {
ret_val = compose_answer(name, type_h, class_h, results, resp);
if (result_ar)
err =
check_results(context, desc, name, class_h, type_h,
result_ar, results, trusted_only, &start);
val_free_result_chain(results);
} else {
fprintf(stderr, "%s: \t", desc);
fprintf(stderr, "FAILED: Error in val_resolve_and_check(): %s\n",
p_val_err(ret_val));
}
results = NULL;
return (err != 0); /* 0 success, 1 error */
}
int
val_get_answer_from_result(val_context_t *context, const char *name, int class_h,
int type_h, struct val_result_chain **results,
struct val_answer_chain **answers,
unsigned int vgafr_flags)
{
struct val_result_chain *res = NULL;
struct val_answer_chain *ans = NULL;
struct val_answer_chain *last_ans = NULL;
int retval = VAL_NO_ERROR;
const char *n = NULL;
int len;
char *name_alias = NULL;
int trusted, validated;
if (name == NULL || answers == NULL || results == NULL || answers == NULL) {
return VAL_BAD_ARGUMENT;
}
*answers = NULL;
last_ans = NULL;
if (*results == NULL) {
/* Construct a single val_answer_chain with the untrusted status */
ans = (struct val_answer_chain *) MALLOC (sizeof(struct val_answer_chain));
if (ans == NULL) {
return VAL_OUT_OF_MEMORY;
}
ans->val_ans_name = strdup(name);
if (ans->val_ans_name == NULL) {
FREE(ans);
ans = NULL;
return VAL_OUT_OF_MEMORY;
}
ans->val_ans_status = VAL_UNTRUSTED_ANSWER;
ans->val_ans_class = class_h;
ans->val_ans_type = type_h;
ans->val_ans = NULL;
ans->val_ans_next = NULL;
*answers = ans;
return VAL_NO_ERROR;
}
trusted = 1;
validated = 1;
/* Construct the val_answer_chain linked list for returned results */
for (res = *results; res; res=res->val_rc_next) {
if (!validated || !val_isvalidated(res->val_rc_status))
validated = 0;
if (!trusted || !val_istrusted(res->val_rc_status))
trusted = 0;
/*
* we don't need cnames/dnames in the answer,
* we only need the name that is being pointed to.
*/
if (res->val_rc_alias) {
name_alias = res->val_rc_alias;
continue;
}
ans = (struct val_answer_chain *) MALLOC (sizeof(struct val_answer_chain));
if (ans == NULL) {
retval = VAL_OUT_OF_MEMORY;
goto err;
}
/* add to end of chain */
ans->val_ans_next = NULL;
if (last_ans) {
last_ans->val_ans_next = ans;
} else {
*answers = ans;
}
last_ans = ans;
if (res->val_rc_rrset) {
/* use values from the rrset */
n = res->val_rc_rrset->val_rrset_name;
ans->val_ans_class = res->val_rc_rrset->val_rrset_class;
ans->val_ans_type = res->val_rc_rrset->val_rrset_type;
ans->val_ans = (struct rr_rec *) (res->val_rc_rrset->val_rrset_data);
res->val_rc_rrset->val_rrset_data = NULL;
} else {
if (name_alias) {
n = name_alias; /* the last alias target */
} else {
n = name; /* the name being queried for */
}
ans->val_ans_class = class_h;
ans->val_ans_type = type_h;
ans->val_ans = NULL;
}
/* Convert the name to a string */
ans->val_ans_name = NULL;
len = strlen(n) + 1;
ans->val_ans_name = (char *) MALLOC (len * sizeof (char));
if (ans->val_ans_name == NULL) {
retval = VAL_OUT_OF_MEMORY;
goto err;
}
strcpy(ans->val_ans_name, n);
/*
* if the current answer was validated or
* if the current answer was trusted use the exact status
*/
if (validated ||
(trusted && !val_isvalidated(res->val_rc_status))) {
ans->val_ans_status = res->val_rc_status;
} else if (trusted) {
/*
* If the combined answer was trusted but the current answer
* was validated (implied), use the lower bounds of trust
*/
if (val_does_not_exist(res->val_rc_status)) {
if (res->val_rc_status == VAL_NONEXISTENT_NAME)
ans->val_ans_status = VAL_NONEXISTENT_NAME_NOCHAIN;
else
ans->val_ans_status = VAL_NONEXISTENT_TYPE_NOCHAIN;
} else {
ans->val_ans_status = VAL_TRUSTED_ANSWER;
}
} else {
ans->val_ans_status = VAL_UNTRUSTED_ANSWER;
}
/*
* reset the below values so that we are able to handle different
* status values for different answers
*/
validated = 1;
trusted = 1;
}
val_free_result_chain(*results);
*results = NULL;
return VAL_NO_ERROR;
err:
val_free_answer_chain(*answers);
*answers = NULL;
val_free_result_chain(*results);
*results = NULL;
return retval;
}
static int
get_results(val_context_t * context, const char *desc, char *name,
int class_h, int type_h, u_char *response,
int *response_size, int trusted_only)
{
int response_size_max, ret_val, err = 0;
struct val_result_chain *results = NULL;
struct val_response resp;
if ((NULL == desc) || (NULL == name) || (NULL == response) ||
(NULL == response_size))
return -1;
response_size_max = *response_size;
*response_size = 0;
fprintf(stderr, "%s: ****START**** \n", desc);
/*
* Query the validator
*/
ret_val = val_resolve_and_check(context, name, class_h, type_h,
VAL_QUERY_AC_DETAIL, &results);
if (ret_val == VAL_NO_ERROR) {
ret_val = compose_answer(name, type_h, class_h, results, &resp);
val_free_result_chain(results);
if (VAL_NO_ERROR != ret_val) {
fprintf(stderr, "%s: \t", desc);
fprintf(stderr, "FAILED: Error in compose_answer(): %d\n",
ret_val);
}
else {
if (resp.vr_response == NULL) {
fprintf(stderr, "FAILED: No response\n");
} else {
printf("DNSSEC status: %s [%d]\n",
p_val_error(resp.vr_val_status), resp.vr_val_status);
if (val_isvalidated(resp.vr_val_status)) {
printf("Validated response:\n");
} else if (val_istrusted(resp.vr_val_status)) {
printf("Trusted but not validated response:\n");
} else {
printf("Non-validated response:\n");
}
if (resp.vr_length > response_size_max) {
err = 1;
}
else {
print_response(resp.vr_response, resp.vr_length);
memcpy(response, resp.vr_response, resp.vr_length);
*response_size = resp.vr_length;
}
FREE(resp.vr_response);
}
}
} else {
fprintf(stderr, "%s: \t", desc);
fprintf(stderr, "FAILED: Error in val_resolve_and_check(): %d, %s\n",
ret_val, p_val_err(ret_val));
}
fprintf(stderr, "%s: ****END**** \n", desc);
return (err != 0); /* 0 success, 1 error */
}
/*
* Function: val_gethostbyname2_r
*
* Purpose: A validating DNSSEC-aware version of the reentrant gethostbyname2_r
* function. This function supports both IPv4 and IPv6 addresses.
*
* Parameters:
* ctx -- The validation context. Can be NULL for default value.
* name -- The domain name or IP address in string format.
* af -- Address family AF_INET or AF_INET6
* ret -- Pointer to a hostent variable to store the return value.
* This parameter must not be NULL.
* buf -- Pointer to a buffer to store auxiliary data. This
* parameter must not be NULL.
* buflen -- Length of the buffer 'buf'.
* result -- Pointer to a variable of type (struct hostent *). This
* parameter must not be NULL. *result will contain NULL on
* failure and will point to the 'ret' parameter on success.
* h_errnop -- Pointer to an integer variable to return the h_errno error
* code. This parameter must not be NULL.
* val_status -- A pointer to a val_status_t variable to hold the
* returned validation-status value. This parameter
* must not be NULL.
* If successful, *val_status will contain a success
* code. If there is a failure, *val_status will contain
* the validator error code. To test whether the returned
* error code represents a trustworthy status, the caller
* can use the val_istrusted() function.
*
* Return value: 0 on success, and a non-zero error-code on failure.
*
* See also: val_gethostbyname2(), val_gethostbyname_r(), val_istrusted()
*/
int
val_gethostbyname2_r(val_context_t * context,
const char *name,
int af,
struct hostent *ret,
char *buf,
size_t buflen,
struct hostent **result,
int *h_errnop, val_status_t * val_status)
{
struct sockaddr_in sa;
#if defined( WIN32 )
size_t addrlen4 = sizeof(struct sockaddr_in);
#endif
#ifdef VAL_IPV6
struct sockaddr_in6 sa6;
#if defined( WIN32 )
size_t addrlen6 = sizeof(struct sockaddr_in6);
#endif
#endif
int offset = 0;
val_status_t local_ans_status = VAL_OOB_ANSWER;
int trusted = 0;
int retval;
struct val_result_chain *results = NULL;
u_int16_t type;
val_context_t *ctx = NULL;
*val_status = VAL_DONT_KNOW;
if (!name || !ret || !h_errnop || !val_status || !result || !buf) {
goto err;
}
ctx = val_create_or_refresh_context(context); /* does CTX_LOCK_POL_SH */
if (ctx == NULL)
goto err;
if (VAL_NO_ERROR == val_is_local_trusted(ctx, &trusted)) {
if (trusted) {
local_ans_status = VAL_TRUSTED_ANSWER;
}
}
/*
* Check if the address-family is AF_INET and the address is an IPv4 address
*/
if ((af == AF_INET) && (INET_PTON(AF_INET, name, ((struct sockaddr *)&sa), &addrlen4) > 0)) {
memset(ret, 0, sizeof(struct hostent));
// Name
ret->h_name = bufalloc(buf, buflen, &offset, strlen(name) + 1);
if (ret->h_name == NULL) {
goto err;
}
memcpy(ret->h_name, name, strlen(name) + 1);
// Alias
ret->h_aliases =
(char **) bufalloc(buf, buflen, &offset, sizeof(char *));
if (ret->h_aliases == NULL) {
goto err;
}
ret->h_aliases[0] = 0;
// Address
ret->h_addrtype = AF_INET;
ret->h_length = sizeof(struct in_addr);
ret->h_addr_list =
(char **) bufalloc(buf, buflen, &offset, 2 * sizeof(char *));
if (ret->h_addr_list == NULL) {
goto err;
}
ret->h_addr_list[0] =
(char *) bufalloc(buf, buflen, &offset,
sizeof(struct in_addr));
if (ret->h_addr_list[0] == NULL) {
goto err;
}
memcpy(ret->h_addr_list[0], &sa.sin_addr, sizeof(struct in_addr));
ret->h_addr_list[1] = 0;
*val_status = VAL_TRUSTED_ANSWER;
*h_errnop = NETDB_SUCCESS;
*result = ret;
}
#ifdef VAL_IPV6
/*
* Check if the address-family is AF_INET6 and the address is an IPv6 address
*/
else if ((af == AF_INET6)
&& (INET_PTON(AF_INET6, name, ((struct sockaddr *)&sa6), &addrlen6) > 0)) {
memset(ret, 0, sizeof(struct hostent));
// Name
ret->h_name = bufalloc(buf, buflen, &offset, strlen(name) + 1);
if (ret->h_name == NULL) {
goto err;
}
memcpy(ret->h_name, name, strlen(name) + 1);
// Alias
ret->h_aliases =
(char **) bufalloc(buf, buflen, &offset, sizeof(char *));
if (ret->h_aliases == NULL) {
goto err;
}
ret->h_aliases[0] = 0;
// Address
ret->h_addrtype = AF_INET6;
ret->h_length = sizeof(struct in6_addr);
ret->h_addr_list =
(char **) bufalloc(buf, buflen, &offset, 2 * sizeof(char *));
if (ret->h_addr_list == NULL) {
goto err;
}
ret->h_addr_list[0] =
(char *) bufalloc(buf, buflen, &offset,
sizeof(struct in6_addr));
if (ret->h_addr_list[0] == NULL) {
goto err;
}
memcpy(ret->h_addr_list[0], &sa6.sin6_addr, sizeof(struct in6_addr));
ret->h_addr_list[1] = 0;
*val_status = VAL_TRUSTED_ANSWER;
*h_errnop = NETDB_SUCCESS;
*result = ret;
}
#endif
else if (NULL !=
(*result = get_hostent_from_etc_hosts(ctx, name, af,
ret, buf, buflen, &offset))) {
/*
* First check the ETC_HOSTS file
* XXX: TODO check the order in the ETC_HOST_CONF file
*/
*val_status = local_ans_status;
*h_errnop = NETDB_SUCCESS;
} else {
#ifdef VAL_IPV6
if (af == AF_INET6)
type = ns_t_aaaa;
else
#endif
type = ns_t_a;
/*
* Query the validator
*/
if (VAL_NO_ERROR ==
(retval =
val_resolve_and_check(ctx, name, ns_c_in, type,
0,
&results))) {
/*
* Convert the validator result into hostent
*/
*result =
get_hostent_from_response(ctx, af, ret, results,
h_errnop, buf, buflen, &offset, val_status);
} else {
val_log(ctx, LOG_ERR,
"val_gethostbyname2_r(): val_resolve_and_check failed - %s", p_val_err(retval));
}
if (*result == NULL) {
goto err;
} else {
val_free_result_chain(results);
results = NULL;
*h_errnop = NETDB_SUCCESS;
}
}
val_log(ctx, LOG_DEBUG, "val_gethostbyname2_r returned success, herrno = %d, val_status = %s",
*h_errnop, val_status? p_val_status(*val_status) : NULL);
CTX_UNLOCK_POL(ctx);
return 0;
err:
if (result) {
*result = NULL;
}
if (h_errnop)
*h_errnop = NO_RECOVERY;
if (ctx) {
val_log(ctx, LOG_DEBUG, "val_gethostbyname2_r returned failure, herrno = %d, val_status = %s",
*h_errnop, val_status? p_val_status(*val_status) : NULL);
CTX_UNLOCK_POL(ctx);
}
return (NO_RECOVERY);
}
