/**
* Initialize the dirwatch package
*
* @exceptions Aborts if already initialized or on failure to initialize inotify
*/
void
sxe_dirwatch_init(void)
{
SXEE60("()");
if (sxe_dirwatch_inotify_fd != -1) {
SXEL60("sxe_dirwatch_init: Already initialized");
goto SXE_EARLY_OUT;
}
SXEA11((sxe_dirwatch_inotify_fd = inotify_init()) != -1, "sxe_dirwatch_init: inotify_init() failed with %s", strerror(errno));
SXEL61("inotify_init() returned fd: %d", sxe_dirwatch_inotify_fd);
SXE_LIST_CONSTRUCT(&sxe_dirwatch_list, 0, SXE_DIRWATCH, node);
ev_io_init(&sxe_dirwatch_watcher, sxe_dirwatch_event, sxe_dirwatch_inotify_fd, EV_READ);
SXE_EARLY_OUT:
SXER60("return");
}
/* Note that the decoded_name will be NUL terminated, and therefore the
* maximum_name_length_maximum should probably be 254 and not 253 (though, with
* pointers, the decoded name could well be *longer* than 253 characters!
*/
static SXE_RETURN
sxe_dns_decode_name(
const unsigned char * dns_packet ,
unsigned dns_packet_length ,
unsigned name_offset ,
char * decoded_name ,
unsigned decoded_name_length_maximum,
unsigned * decoded_name_length )
{
SXE_RETURN result = SXE_RETURN_ERROR_INTERNAL;
unsigned decoded_name_offset = 0;
SXEE86("sxe_dns_decode_name(dns_packet=%p, dns_packet_length=%u, name_offset=%u, decoded_name=%p, decoded_name_length_maximum=%u, decoded_name_length=%p)", dns_packet, dns_packet_length, name_offset, decoded_name, decoded_name_length_maximum, decoded_name_length);
SXEA10(decoded_name_length != 0, "A value for decoded_name_length must be provided");
SXEA10(decoded_name == NULL || decoded_name_length_maximum != 0, "NAME can not be decoded into an empty buffer");
while (name_offset < dns_packet_length) {
unsigned char len = dns_packet[name_offset];
if (len == '\0') {
SXEL60("NAME is terminated normally");
if (decoded_name_offset > 0) {
--decoded_name_offset;
}
if (decoded_name != NULL) {
decoded_name[decoded_name_offset] = '\0';
}
*decoded_name_length = decoded_name_offset;
result = SXE_RETURN_OK;
goto SXE_EARLY_OUT;
}
else if ((len & SXE_DNS_LABEL_LENGTH_POINTER) == 0) {
SXEL73("Normal label of length %u '%.*s'", len, len, &dns_packet[name_offset + 1]);
/* Don't allow the NAME to exceed the known packet length */
if ((decoded_name != NULL) && (decoded_name_offset + len + 1 >= decoded_name_length_maximum)) {
SXEL51("sxe_dns_decode_name(): NAME is invalid; Decoded NAME is longer than the provided buffer length %u", decoded_name_length_maximum);
goto SXE_ERROR_OUT;
}
/* Copy the label */
if (decoded_name != NULL) {
memcpy((unsigned char*)(decoded_name + decoded_name_offset), dns_packet + name_offset + 1, len);
decoded_name[decoded_name_offset + len] = '.';
}
decoded_name_offset += len + 1;
}
else if ((len & SXE_DNS_LABEL_LENGTH_POINTER) == SXE_DNS_LABEL_LENGTH_POINTER) {
SXEL60("NAME includes a pointer");
name_offset = (len & ~SXE_DNS_LABEL_LENGTH_POINTER) + dns_packet[name_offset + 1];
SXEL61("New NAME offset is %u", name_offset);
/* Prevent looping forever - a pointer should never point to a pointer
*/
if ((dns_packet[name_offset] & SXE_DNS_LABEL_LENGTH_POINTER) != 0) {
SXEL51("sxe_dns_decode_name(): NAME contains a pointer which points to another pointer at packet offset %u",
name_offset);
goto SXE_ERROR_OUT;
}
continue;
}
else {
SXEL51("sxe_dns_decode_name(): NAME is invalid; NAME contains an invalid length/pointer value at packet offset %u", name_offset);
goto SXE_ERROR_OUT;
}
name_offset += len + 1;
}
SXEL60("NAME is invalid because it extends outside the packet");
SXE_ERROR_OUT:
SXE_EARLY_OUT:
SXER81("return // result=%s", sxe_return_to_string(result));
return result;
}
int
main(int argc, char ** argv)
{
#ifdef WINDOWS_NT
SXEL10("WARNING: Need to implement sxe_spawn() on Windows to run this test file!");
#else
int fd;
double start_time;
unsigned count;
unsigned id;
unsigned * pool;
unsigned * shared;
size_t size;
SXE_MMAP memmap;
SXE_RETURN result;
SXE_SPAWN spawn[TEST_CLIENT_INSTANCES];
if (argc > 1) {
count = atoi(argv[1]);
sxe_mmap_open(&memmap, "memmap");
shared = (unsigned *)(unsigned long)SXE_MMAP_ADDR(&memmap);
pool = sxe_pool_from_base(shared);
SXEL63("Instance %u mapped to shared pool // base=%p, pool=%p", count, shared, pool);
do {
usleep(10000 * count);
id = sxe_pool_set_oldest_element_state_locked(pool, TEST_STATE_FREE, TEST_STATE_CLIENT_TAKE);
SXEA10(id != SXE_POOL_LOCK_NEVER_TAKEN, "Got SXE_POOL_LOCK_NEVER_TAKEN");;
} while (id == SXE_POOL_NO_INDEX);
SXEL62("Instance %u got pool element %u", count, id);
pool[id] = count;
sxe_pool_set_indexed_element_state_locked(pool, id, TEST_STATE_CLIENT_TAKE, TEST_STATE_CLIENT_DONE);
sxe_mmap_close(&memmap);
SXEL61("Instance %u exiting", count);
return 0;
}
plan_tests(5);
ok((size = sxe_pool_size(TEST_CLIENT_INSTANCES/2, sizeof(*pool), TEST_STATE_NUMBER_OF_STATES)) >= TEST_CLIENT_INSTANCES * sizeof(*pool),
"Expect pool size %u to be at least the size of the array %u", size, TEST_CLIENT_INSTANCES * sizeof(*pool));
SXEA11((fd = open("memmap", O_CREAT | O_TRUNC | O_WRONLY, 0666)) >= 0, "Failed to create file 'memmap': %s", strerror(errno));
SXEA12(ftruncate(fd, size) >= 0, "Failed to extend the file to %lu bytes: %s", size, strerror(errno));
close(fd);
sxe_mmap_open(&memmap, "memmap");
shared = (unsigned *)(unsigned long)SXE_MMAP_ADDR(&memmap);
pool = sxe_pool_construct(shared, "shared-pool", TEST_CLIENT_INSTANCES/2, sizeof(*pool), TEST_STATE_NUMBER_OF_STATES, SXE_POOL_LOCKS_ENABLED);
sxe_register(TEST_CLIENT_INSTANCES + 1, 0);
SXEA11((result = sxe_init()) == SXE_RETURN_OK, "Failed to initialize the SXE package: %s", sxe_return_to_string(result));
for (count = 1; count <= TEST_CLIENT_INSTANCES; count++) {
char buffer[12];
snprintf(buffer, sizeof(buffer), "%u", count);
result = sxe_spawn(NULL, &spawn[count - 1], argv[0], buffer, NULL, NULL, NULL, NULL);
SXEA13(result == SXE_RETURN_OK, "Failed to spawn '%s %s': %s", argv[0], buffer, sxe_return_to_string(result));
}
start_time = sxe_get_time_in_seconds();
for (count = 0; (count < TEST_CLIENT_INSTANCES); ) {
SXEA10((TEST_WAIT + start_time ) > sxe_get_time_in_seconds(), "Unexpected timeout... is the hardware too slow?");
usleep(10000);
id = sxe_pool_set_oldest_element_state_locked(pool, TEST_STATE_CLIENT_DONE, TEST_STATE_FREE);
/* Assert here in the test. The actual service would take specific action here */
SXEA12(id != SXE_POOL_LOCK_NEVER_TAKEN, "Parent: Failed to acqure lock .. yield limit reached. id %u vs %u", id, SXE_POOL_LOCK_NEVER_TAKEN);
if (id != SXE_POOL_NO_INDEX) {
SXEL62("Looks like instance %u got element %u", pool[id], id);
count++;
}
}
ok(count == TEST_CLIENT_INSTANCES, "All clients got an element in the pool");
start_time = sxe_get_time_in_seconds();
for (count = 0; (count < TEST_CLIENT_INSTANCES); count++) {
SXEA10((TEST_WAIT + start_time ) > sxe_get_time_in_seconds(), "Unexpected timeout... is the hardware too slow?");
waitpid(spawn[count].pid, NULL, 0);
}
ok(SXE_POOL_LOCK_NEVER_TAKEN != sxe_pool_lock(pool), "Forced lock to be always locked!");
id = sxe_pool_set_oldest_element_state_locked(pool, TEST_STATE_FREE, TEST_STATE_FREE);
ok(id == SXE_POOL_LOCK_NEVER_TAKEN, "sxe_pool_set_oldest_element_state_locked() Failed to acquire lock");
id = sxe_pool_set_indexed_element_state_locked(pool, 0, TEST_STATE_FREE, TEST_STATE_FREE);
ok(id == SXE_POOL_LOCK_NEVER_TAKEN, "sxe_pool_set_indexed_element_state_locked() Failed to acquire lock");
sxe_pool_unlock(pool);
sxe_pool_override_locked(pool); /* for coverage */
sxe_mmap_close(&memmap);
return exit_status();
#endif
}
