bool NetworkMessage::send(int sd) {
fseek(payload, 0, SEEK_SET);
uint32_t payload_left = get_payload_size();
uint32_t msg_size = htonl(payload_left);
if (::send(sd, &header, sizeof(uint8_t), 0) < 0)
return false;
if (::send(sd, &msg_size, sizeof(uint32_t), 0) < 0)
return false;
if (payload != NULL) {
off_t offset = 0;
int send_len = 0;
int fd = fileno(payload);
while (payload_left > 0) {
send_len = sendfile(sd, fd, &offset, 65535);
if (send_len < 0)
return false;
payload_left -= send_len;
}
}
return true;
}
static int test_02_incorrect_payload_type(uint32_t data)
{
bool failed = false;
bass_return_code result = BASS_RC_ERROR_UNKNOWN;
bass_payload_type_t correct_payload_type = BASS_PL_TYPE_X_LOADER;
bass_payload_type_t payload_type = BASS_PL_TYPE_TAPP;
bass_hash_type_t hashtype = BASS_APP_SHA256_HASH;
size_t i = 0;
size_t ehash_size = SHA256_HASH_SIZE;
uint8_t ehash[SHA256_HASH_SIZE];
uint32_t payload_size = 0;
uint32_t payload_offset = 0;
(void)data;
dprintf(INFO, "Starting test\n");
memset(&ehash, 0, sizeof(ehash));
/*
* We use the correct payload_type when getting the expected hash from
* verify signed header, since the purpose of this test case is to test if
* bass_app_test_check_payload_hash is working as it should.
*/
result = get_ehash(signed_payload, signed_payload_size,
correct_payload_type, ehash);
if (result != BASS_RC_SUCCESS) {
dprintf(ERROR, "failed to getting ehash\n");
return result;
}
payload_offset = get_header_size(signed_payload);
payload_size = get_payload_size(signed_payload);
for (i = payload_type;
(i <= BASS_PL_TYPE_FRAC) && (i != correct_payload_type);
++i) {
result = bass_check_payload_hash(&hashtype,
&payload_type,
(void *)(signed_payload + payload_offset),
payload_size,
ehash,
ehash_size);
if (result == BASS_RC_SUCCESS) {
dprintf(ERROR, "incorrectly got a successfull result when "
"checking payload hash using payload_type: %d\n", i);
failed = true;
}
}
return failed ? BASS_RC_FAILURE : BASS_RC_SUCCESS;
}
static int test_01_normal_payload_check(uint32_t data)
{
bass_return_code result = BASS_RC_ERROR_UNKNOWN;
bass_payload_type_t payload_type = BASS_PL_TYPE_X_LOADER;
bass_hash_type_t hashtype = BASS_APP_SHA256_HASH;
size_t ehash_size = SHA256_HASH_SIZE;
uint8_t ehash[SHA256_HASH_SIZE];
uint32_t payload_size = 0;
uint32_t payload_offset = 0;
(void)data;
dprintf(INFO, "Starting test\n");
memset(&ehash, 0, sizeof(ehash));
result = get_ehash(signed_payload, signed_payload_size, payload_type,
ehash);
if (result != BASS_RC_SUCCESS) {
dprintf(ERROR, "failed to getting ehash\n");
return result;
}
payload_offset = get_header_size(signed_payload);
payload_size = get_payload_size(signed_payload);
result = bass_check_payload_hash(&hashtype,
&payload_type,
(void *)(signed_payload + payload_offset),
payload_size,
ehash,
ehash_size);
if (result != BASS_RC_SUCCESS) {
dprintf(ERROR, "failed checking payload hash\n");
return result;
}
return result;
}
int rtp_connection_kick(struct rtp_connection *connection) {
int n, err = 0, retval = 0, i = 0, bytes_available = 0, sk = 0;
struct hostent *hp;
char buffer[1000];
struct rtp_packet *packet;
fd_set rfds;
int readchars = 0;
struct timeval tv;
packet = create_rtp_packet(get_payload_size(connection));
if(packet == NULL) {
err = RTP_PACKET_ALLOC_ERROR;
goto exit_no_packet;
}
/* Initialize rtp packet */
init_rtp_packet(packet, connection->seq_no, connection->timestamp,
connection->ssrc);
while(1) {
/* TODO Here we should take into account the
* processing time taken to send the packets,
* so that we don't introduce extra latency
* between samples */
tv.tv_sec = connection->send_interval.tv_sec;
tv.tv_usec = connection->send_interval.tv_usec;
/* Watch stdin (fd 0) to see when it has input. */
FD_ZERO(&rfds);
FD_SET(0, &rfds);
retval = select(fileno(stdin)+1, &rfds, NULL, NULL, &tv);
if (retval < 0) {
perror("Error in select: ");
goto exit;
}
// Check amount of data in pipe
err = ioctl(connection->data_input, FIONREAD, &bytes_available);
if(err != 0) {
perror("Error while checking size of pipe: ");
goto exit;
}
if (FD_ISSET(fileno(stdin), &rfds)) { // stdin
read(fileno(stdin), buffer, 1);
if(buffer[0] == 'e' || buffer[0] == 'E') {
goto exit;
}
else if(buffer[0] == 'f' || buffer[0] == 'F') { // Flush
flush_file(connection->data_input);
continue;
}
}
if (bytes_available >= packet->payload_size) { // audio stream
readchars = read(connection->data_input, packet->payload, packet->payload_size);
for(i = 0; i < connection->howmany; i++) {
sk = (connection->destinations[i].addr.ss_family ==
AF_INET) ? connection->bind_sk4 :
connection->bind_sk6;
n = sendto(sk, packet->start,
packet->packet_size, 0,
(const struct sockaddr *)
&connection->destinations[i].addr,
connection->destinations[i].length);
if (n < 0) {
err = UDP_SEND_ERROR;
goto exit;
}
}
// printf(".");
// fflush(stdout);
connection->seq_no++;
connection->timestamp +=
get_timestamp_per_packet_inc(connection);
/* TODO packet no as seq no might wrap */
init_rtp_packet(packet, htons(connection->seq_no),
htonl(connection->timestamp), connection->ssrc);
}
}
exit:
free(packet);
exit_no_packet:
return err;
}
/**
*
* Hybi 13 data streams represent a series of variable length frames. Each
* frame is made up of a series of fixed length fields. The lengths of later
* fields are contained in earlier fields. The first field length is fixed
* by the spec.
*
* This processor represents a state machine that keeps track of what field
* is presently being read and how many more bytes are needed to complete it
*
*
*
*
* Read two header bytes
* Extract full frame length.
* Read extra header bytes
* Validate frame header (including extension validate)
* Read extension data into extension message state object
* Read payload data into payload
*
* @param buf Input buffer
*
* @param len Length of input buffer
*
* @return Number of bytes processed or zero on error
*/
size_t consume(uint8_t * buf, size_t len, lib::error_code & ec) {
size_t p = 0;
ec = lib::error_code();
//std::cout << "consume: " << utility::to_hex(buf,len) << std::endl;
// Loop while we don't have a message ready and we still have bytes
// left to process.
while (m_state != READY && m_state != FATAL_ERROR &&
(p < len || m_bytes_needed == 0))
{
if (m_state == HEADER_BASIC) {
p += this->copy_basic_header_bytes(buf+p,len-p);
if (m_bytes_needed > 0) {
continue;
}
ec = this->validate_incoming_basic_header(
m_basic_header, base::m_server, !m_data_msg.msg_ptr
);
if (ec) {break;}
// extract full header size and adjust consume state accordingly
m_state = HEADER_EXTENDED;
m_cursor = 0;
m_bytes_needed = frame::get_header_len(m_basic_header) -
frame::BASIC_HEADER_LENGTH;
} else if (m_state == HEADER_EXTENDED) {
p += this->copy_extended_header_bytes(buf+p,len-p);
if (m_bytes_needed > 0) {
continue;
}
ec = validate_incoming_extended_header(m_basic_header,m_extended_header);
if (ec){break;}
m_state = APPLICATION;
m_bytes_needed = static_cast<size_t>(get_payload_size(m_basic_header,m_extended_header));
// check if this frame is the start of a new message and set up
// the appropriate message metadata.
frame::opcode::value op = frame::get_opcode(m_basic_header);
// TODO: get_message failure conditions
if (frame::opcode::is_control(op)) {
m_control_msg = msg_metadata(
m_msg_manager->get_message(op,m_bytes_needed),
frame::get_masking_key(m_basic_header,m_extended_header)
);
m_current_msg = &m_control_msg;
} else {
if (!m_data_msg.msg_ptr) {
if (m_bytes_needed > base::m_max_message_size) {
ec = make_error_code(error::message_too_big);
break;
}
m_data_msg = msg_metadata(
m_msg_manager->get_message(op,m_bytes_needed),
frame::get_masking_key(m_basic_header,m_extended_header)
);
} else {
// Fetch the underlying payload buffer from the data message we
// are writing into.
std::string & out = m_data_msg.msg_ptr->get_raw_payload();
if (out.size() + m_bytes_needed > base::m_max_message_size) {
ec = make_error_code(error::message_too_big);
break;
}
// Each frame starts a new masking key. All other state
// remains between frames.
m_data_msg.prepared_key = prepare_masking_key(
frame::get_masking_key(
m_basic_header,
m_extended_header
)
);
out.reserve(out.size() + m_bytes_needed);
}
m_current_msg = &m_data_msg;
}
} else if (m_state == EXTENSION) {
m_state = APPLICATION;
} else if (m_state == APPLICATION) {
size_t bytes_to_process = (std::min)(m_bytes_needed,len-p);
if (bytes_to_process > 0) {
p += this->process_payload_bytes(buf+p,bytes_to_process,ec);
if (ec) {break;}
}
if (m_bytes_needed > 0) {
continue;
}
// If this was the last frame in the message set the ready flag.
// Otherwise, reset processor state to read additional frames.
if (frame::get_fin(m_basic_header)) {
// ensure that text messages end on a valid UTF8 code point
if (frame::get_opcode(m_basic_header) == frame::opcode::TEXT) {
if (!m_current_msg->validator.complete()) {
ec = make_error_code(error::invalid_utf8);
break;
}
}
m_state = READY;
} else {
this->reset_headers();
}
} else {
// shouldn't be here
ec = make_error_code(error::general);
return 0;
}
}
return p;
}
static int test_03_modified_payload(uint32_t data)
{
bool failed = false;
bass_return_code result = BASS_RC_ERROR_UNKNOWN;
bass_payload_type_t payload_type = BASS_PL_TYPE_X_LOADER;
bass_hash_type_t hashtype = BASS_APP_SHA256_HASH;
size_t ehash_size = SHA256_HASH_SIZE;
uint8_t ehash[SHA256_HASH_SIZE];
uint8_t *modified_payload = NULL;
uint32_t payload_size = 0;
uint32_t payload_offset = 0;
(void)data;
dprintf(INFO, "Starting test\n");
memset(&ehash, 0, sizeof(ehash));
result = get_ehash(signed_payload, signed_payload_size, payload_type,
ehash);
if (result != BASS_RC_SUCCESS) {
dprintf(ERROR, "failed to getting ehash\n");
return result;
}
payload_offset = get_header_size(signed_payload);
payload_size = get_payload_size(signed_payload);
modified_payload = malloc(sizeof(uint8_t) * payload_size);
if (!modified_payload) {
return BASS_RC_FAILURE;
}
memcpy(modified_payload, signed_payload + payload_offset, payload_size);
/*
* Set the first 48 bytes to 0xFF (which is ok in in the payloads used in
* this file, any number is good as long as it isn't greater than payload
* size).
* */
memset(modified_payload, 0xFF, 48);
result = bass_check_payload_hash(&hashtype,
&payload_type,
(void *)(modified_payload),
payload_size,
ehash,
ehash_size);
if (result == BASS_RC_SUCCESS) {
dump_buffer("Expected hash", ehash, ehash_size);
dump_buffer("Correct payload", signed_payload + payload_offset,
payload_size);
dump_buffer("modified_payload", modified_payload, payload_size);
dprintf(ERROR, "incorrectly got a successfull result when checking "
"payload hash using modified payload\n");
failed = true;
}
free(modified_payload);
/*
* Not that we expect this to fail internally, but to the function calling
* this function it should be BASS_RC_SUCCESS test case went as expected.
*/
return failed ? BASS_RC_FAILURE : BASS_RC_SUCCESS;
}