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librpc/rpc: simplify dcerpc_parse_binding()

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We now make a copy of the given string, so that we can mark chunks
inline. Then we call dcerpc_binding_set_string_option() in order
to set the elements.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
This commit is contained in:
Stefan Metzmacher 2014-01-23 12:13:14 +01:00 committed by Günther Deschner
parent ed8adc2920
commit 9f5a59eb53
1 changed files with 102 additions and 118 deletions
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220
librpc/rpc/binding.c
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@ -290,156 +290,140 @@ _PUBLIC_ char *dcerpc_binding_string(TALLOC_CTX *mem_ctx, const struct dcerpc_bi
/*
parse a binding string into a dcerpc_binding structure
*/
_PUBLIC_ NTSTATUS dcerpc_parse_binding(TALLOC_CTX *mem_ctx, const char *s, struct dcerpc_binding **b_out)
_PUBLIC_ NTSTATUS dcerpc_parse_binding(TALLOC_CTX *mem_ctx, const char *_s, struct dcerpc_binding **b_out)
{
char *_t;
struct dcerpc_binding *b;
char *options;
char *s;
char *options = NULL;
char *p;
int i, j, comma_count;
size_t i;
NTSTATUS status;
b = talloc_zero(mem_ctx, struct dcerpc_binding);
if (!b) {
return NT_STATUS_NO_MEMORY;
}
_t = talloc_strdup(b, _s);
if (_t == NULL) {
talloc_free(b);
return NT_STATUS_NO_MEMORY;
}
s = _t;
p = strchr(s, '[');
if (p) {
*p = '\0';
options = p + 1;
if (options[strlen(options)-1] != ']') {
talloc_free(b);
return NT_STATUS_INVALID_PARAMETER_MIX;
}
options[strlen(options)-1] = 0;
}
p = strchr(s, '@');
if (p && PTR_DIFF(p, s) == 36) { /* 36 is the length of a UUID */
NTSTATUS status;
DATA_BLOB blob = data_blob(s, 36);
status = GUID_from_data_blob(&blob, &b->object.uuid);
*p = '\0';
if (NT_STATUS_IS_ERR(status)) {
DEBUG(0, ("Failed parsing UUID\n"));
status = dcerpc_binding_set_string_option(b, "object", s);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(b);
return status;
}
s = p + 1;
} else {
ZERO_STRUCT(b->object);
}
b->object.if_version = 0;
p = strchr(s, ':');
if (p == NULL) {
b->transport = NCA_UNKNOWN;
} else {
char *type = talloc_strndup(mem_ctx, s, PTR_DIFF(p, s));
if (!type) {
return NT_STATUS_NO_MEMORY;
*p = '\0';
status = dcerpc_binding_set_string_option(b, "transport", s);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(b);
return status;
}
for (i=0;i<ARRAY_SIZE(transports);i++) {
if (strcasecmp(type, transports[i].name) == 0) {
b->transport = transports[i].transport;
break;
s = p + 1;
}
if (strlen(s) > 0) {
status = dcerpc_binding_set_string_option(b, "host", s);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(b);
return status;
}
b->target_hostname = talloc_strdup(b, b->host);
if (b->target_hostname == NULL) {
talloc_free(b);
return NT_STATUS_NO_MEMORY;
}
}
for (i=0; options != NULL; i++) {
const char *name = options;
const char *value = NULL;
p = strchr(options, ',');
if (p != NULL) {
*p = '\0';
options = p+1;
} else {
options = NULL;
}
p = strchr(name, '=');
if (p != NULL) {
*p = '\0';
value = p + 1;
}
if (value == NULL) {
/*
* If it's not a key=value pair
* it might be a ncacn_option
* or if it's the first option
* it's the endpoint.
*/
const struct ncacn_option *no = NULL;
value = name;
no = ncacn_option_by_name(name);
if (no == NULL) {
if (i > 0) {
/*
* we don't allow unknown options
*/
return NT_STATUS_INVALID_PARAMETER_MIX;
}
/*
* This is the endpoint
*/
name = "endpoint";
if (strlen(value) == 0) {
value = NULL;
}
}
}
if (i==ARRAY_SIZE(transports)) {
DEBUG(0,("Unknown dcerpc transport '%s'\n", type));
return NT_STATUS_INVALID_PARAMETER;
}
talloc_free(type);
s = p+1;
}
p = strchr(s, '[');
if (p) {
b->host = talloc_strndup(b, s, PTR_DIFF(p, s));
options = talloc_strdup(mem_ctx, p+1);
if (options[strlen(options)-1] != ']') {
return NT_STATUS_INVALID_PARAMETER;
}
options[strlen(options)-1] = 0;
} else {
b->host = talloc_strdup(b, s);
options = NULL;
}
if (!b->host) {
return NT_STATUS_NO_MEMORY;
}
b->target_hostname = b->host;
b->options = NULL;
b->flags = 0;
b->assoc_group_id = 0;
b->endpoint = NULL;
if (!options) {
*b_out = b;
return NT_STATUS_OK;
}
comma_count = count_chars(options, ',');
b->options = talloc_array(b, const char *, comma_count+2);
if (!b->options) {
return NT_STATUS_NO_MEMORY;
}
for (i=0; (p = strchr(options, ',')); i++) {
b->options[i] = talloc_strndup(b->options,
options,
PTR_DIFF(p, options));
if (!b->options[i]) {
return NT_STATUS_NO_MEMORY;
}
options = p+1;
}
b->options[i] = talloc_strdup(b->options, options);
if (!b->options[i]) {
return NT_STATUS_NO_MEMORY;
}
b->options[i+1] = NULL;
/* some options are pre-parsed for convenience */
for (i=0;b->options[i];i++) {
for (j=0;j<ARRAY_SIZE(ncacn_options);j++) {
size_t opt_len = strlen(ncacn_options[j].name);
if (strncasecmp(ncacn_options[j].name, b->options[i], opt_len) == 0) {
char *o = discard_const_p(char, b->options[i]);
int k;
char c = b->options[i][opt_len];
if (c != 0) {
continue;
}
b->flags |= ncacn_options[j].flag;
talloc_free(o);
for (k=i;b->options[k];k++) {
b->options[k] = b->options[k+1];
}
i--;
break;
}
status = dcerpc_binding_set_string_option(b, name, value);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(b);
return status;
}
}
if (b->options[0] && strchr(b->options[0], '=') == NULL) {
/* Endpoint is first option */
b->endpoint = talloc_steal(b, b->options[0]);
if (strlen(b->endpoint) == 0) {
char *e = discard_const_p(char, b->endpoint);
talloc_free(e);
b->endpoint = NULL;
}
for (i=0;b->options[i];i++) {
b->options[i] = b->options[i+1];
}
}
if (b->options[0] == NULL) {
TALLOC_FREE(b->options);
}
talloc_free(_t);
*b_out = b;
return NT_STATUS_OK;
}