/** Returns a copy of percent decoded \a src[begin, end) */
static char *decode_and_copy_component(grpc_exec_ctx *exec_ctx, const char *src,
size_t begin, size_t end) {
grpc_slice component =
grpc_slice_from_copied_buffer(src + begin, end - begin);
grpc_slice decoded_component =
grpc_permissive_percent_decode_slice(component);
char *out = grpc_dump_slice(decoded_component, GPR_DUMP_ASCII);
grpc_slice_unref_internal(exec_ctx, component);
grpc_slice_unref_internal(exec_ctx, decoded_component);
return out;
}
static grpc_mdelem *client_recv_filter(void *user_data, grpc_mdelem *md) {
client_recv_filter_args *a = user_data;
if (md == GRPC_MDELEM_STATUS_200) {
return NULL;
} else if (md->key == GRPC_MDSTR_STATUS) {
char *message_string;
gpr_asprintf(&message_string, "Received http2 header with status: %s",
grpc_mdstr_as_c_string(md->value));
grpc_slice message = grpc_slice_from_copied_string(message_string);
gpr_free(message_string);
grpc_call_element_send_close_with_message(a->exec_ctx, a->elem,
GRPC_STATUS_CANCELLED, &message);
return NULL;
} else if (md->key == GRPC_MDSTR_GRPC_MESSAGE) {
grpc_slice pct_decoded_msg =
grpc_permissive_percent_decode_slice(md->value->slice);
if (grpc_slice_is_equivalent(pct_decoded_msg, md->value->slice)) {
grpc_slice_unref(pct_decoded_msg);
return md;
} else {
return grpc_mdelem_from_metadata_strings(
GRPC_MDSTR_GRPC_MESSAGE, grpc_mdstr_from_slice(pct_decoded_msg));
}
} else if (md == GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC) {
return NULL;
} else if (md->key == GRPC_MDSTR_CONTENT_TYPE) {
const char *value_str = grpc_mdstr_as_c_string(md->value);
if (strncmp(value_str, EXPECTED_CONTENT_TYPE,
EXPECTED_CONTENT_TYPE_LENGTH) == 0 &&
(value_str[EXPECTED_CONTENT_TYPE_LENGTH] == '+' ||
value_str[EXPECTED_CONTENT_TYPE_LENGTH] == ';')) {
/* Although the C implementation doesn't (currently) generate them,
any custom +-suffix is explicitly valid. */
/* TODO(klempner): We should consider preallocating common values such
as +proto or +json, or at least stashing them if we see them. */
/* TODO(klempner): Should we be surfacing this to application code? */
} else {
/* TODO(klempner): We're currently allowing this, but we shouldn't
see it without a proxy so log for now. */
gpr_log(GPR_INFO, "Unexpected content-type '%s'", value_str);
}
return NULL;
}
return md;
}
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
struct grpc_memory_counters counters;
grpc_memory_counters_init();
grpc_slice input = grpc_slice_from_copied_buffer((const char *)data, size);
grpc_slice output;
if (grpc_strict_percent_decode_slice(
input, grpc_url_percent_encoding_unreserved_bytes, &output)) {
grpc_slice_unref(output);
}
if (grpc_strict_percent_decode_slice(
input, grpc_compatible_percent_encoding_unreserved_bytes, &output)) {
grpc_slice_unref(output);
}
grpc_slice_unref(grpc_permissive_percent_decode_slice(input));
grpc_slice_unref(input);
counters = grpc_memory_counters_snapshot();
grpc_memory_counters_destroy();
GPR_ASSERT(counters.total_size_relative == 0);
return 0;
}
