The binary options brokers / Hroetch investment holdings

Are my TCPdump filters correct?

I am working on learning to use tcpdump filters without keywords and I think I am doing a pretty good job with these but after trying to check my answers on line I am thinking that I have a few of them slightly wrong but I am not exactly sure. I was hoping that someone could help and explain why my filter is wrong.
Full disclosure I haven't tried any of the filters out since I am trying to write them correctly before I test them on real packets. My exam wont allow me access to testing the filters before I submit them.
  1. Find all of the packets containing ONLY a “SYN” flag
    Tcpdump –n –r testfile.pcap ‘tcp[13] = 2’ or should it be 'tcp[13] 2!=0' I thought that if it equals 2 the only way for that to happen was if in the binary that bit was set to 1 and then it equals 2 in decimal. 
  2. Find all of the packets containing a “FIN ACK” flags.
    Tcpdump –n –r testfile.pcap ‘tcp[13] = 17’ Same thing here where in binary it would equal 17 with the 5th and 1st bits set to 1? 
  3. Find all DNS packets.
    Tcpdump –n –r testfile.pcap ‘udp[0:2] = 0x35 & upd[2:2] = 0x35’ To capture traffic both ways I need source and destination set to DNS? 
  4. Find the ICMP Echo requests ONLY.
     tcpdump –n –r testfile.pcap ‘icmp[0] = 8’ This one seemed pretty straight forward to me. 
  5. Find any packets that have TCP options.
    Tcpdump –n –r testfile.pcap ‘tcp[20:4] > 0’ This one should also work? Any set options would make it greater than 0 
submitted by ITBry to networking [link] [comments]

Adafruit Space Invader pendant. Want to convert to using a bicolor 1.2 led matrix. How would the code change?

 // Trinket/Gemma + LED matrix backpack jewelry. Plays animated // sequence on LED matrix. Press reset button to display again, // or add optional momentary button between pin #1 and +V. // THERE IS NO ANIMATION DATA IN THIS SOURCE FILE, you should // rarely need to change anything here. EDIT anim.h INSTEAD. #define BRIGHTNESS 14 // 0=min, 15=max #define I2C_ADDR 0x70 // Edit if backpack A0/A1 jumpers set #include  #include  #include  #include "anim2.h" // Animation data is located here #include "anim3.h" // Animation data is located here #include "anim4.h" // Animation data is located here static const uint8_t PROGMEM reorder[] = { // Column-reordering table 0x00,0x40,0x20,0x60,0x10,0x50,0x30,0x70,0x08,0x48,0x28,0x68,0x18,0x58,0x38,0x78, 0x04,0x44,0x24,0x64,0x14,0x54,0x34,0x74,0x0c,0x4c,0x2c,0x6c,0x1c,0x5c,0x3c,0x7c, 0x02,0x42,0x22,0x62,0x12,0x52,0x32,0x72,0x0a,0x4a,0x2a,0x6a,0x1a,0x5a,0x3a,0x7a, 0x06,0x46,0x26,0x66,0x16,0x56,0x36,0x76,0x0e,0x4e,0x2e,0x6e,0x1e,0x5e,0x3e,0x7e, 0x01,0x41,0x21,0x61,0x11,0x51,0x31,0x71,0x09,0x49,0x29,0x69,0x19,0x59,0x39,0x79, 0x05,0x45,0x25,0x65,0x15,0x55,0x35,0x75,0x0d,0x4d,0x2d,0x6d,0x1d,0x5d,0x3d,0x7d, 0x03,0x43,0x23,0x63,0x13,0x53,0x33,0x73,0x0b,0x4b,0x2b,0x6b,0x1b,0x5b,0x3b,0x7b, 0x07,0x47,0x27,0x67,0x17,0x57,0x37,0x77,0x0f,0x4f,0x2f,0x6f,0x1f,0x5f,0x3f,0x7f, 0x80,0xc0,0xa0,0xe0,0x90,0xd0,0xb0,0xf0,0x88,0xc8,0xa8,0xe8,0x98,0xd8,0xb8,0xf8, 0x84,0xc4,0xa4,0xe4,0x94,0xd4,0xb4,0xf4,0x8c,0xcc,0xac,0xec,0x9c,0xdc,0xbc,0xfc, 0x82,0xc2,0xa2,0xe2,0x92,0xd2,0xb2,0xf2,0x8a,0xca,0xaa,0xea,0x9a,0xda,0xba,0xfa, 0x86,0xc6,0xa6,0xe6,0x96,0xd6,0xb6,0xf6,0x8e,0xce,0xae,0xee,0x9e,0xde,0xbe,0xfe, 0x81,0xc1,0xa1,0xe1,0x91,0xd1,0xb1,0xf1,0x89,0xc9,0xa9,0xe9,0x99,0xd9,0xb9,0xf9, 0x85,0xc5,0xa5,0xe5,0x95,0xd5,0xb5,0xf5,0x8d,0xcd,0xad,0xed,0x9d,0xdd,0xbd,0xfd, 0x83,0xc3,0xa3,0xe3,0x93,0xd3,0xb3,0xf3,0x8b,0xcb,0xab,0xeb,0x9b,0xdb,0xbb,0xfb, 0x87,0xc7,0xa7,0xe7,0x97,0xd7,0xb7,0xf7,0x8f,0xcf,0xaf,0xef,0x9f,0xdf,0xbf,0xff }; int animationSection = 0; void ledCmd(uint8_t x) { // Issue command to LED backback driver Wire.beginTransmission(I2C_ADDR); Wire.write(x); Wire.endTransmission(); } void clear(void) { // Clear display buffer Wire.beginTransmission(I2C_ADDR); for(uint8_t i=0; i<17; i++) Wire.write(0); Wire.endTransmission(); } void setup() { power_timer1_disable(); // Disable unused peripherals power_adc_disable(); // to save power PCMSK |= _BV(PCINT1); // Set change mask for pin 1 Wire.begin(); // I2C init clear(); // Blank display ledCmd(0x21); // Turn on oscillator ledCmd(0xE0 | BRIGHTNESS); // Set brightness ledCmd(0x81); // Display on, no blink } uint8_t rep = REPS; void loop() { switch (animationSection) { case 0: for(int i=0; i 10) { animationSection = 0; } if(!--rep) { // If last cycle... ledCmd(0x20); // LED matrix in standby mode // GIMSK = _BV(PCIE); // Enable pin change interrupt // power_all_disable(); // All peripherals off // set_sleep_mode(SLEEP_MODE_PWR_DOWN); // sleep_enable(); // sei(); // Keep interrupts disabled // sleep_mode(); // Power down CPU (pin 1 will wake) // Execution resumes here on wake. // PLD - Simply Sleep for 2 minutes then start again... //delay(100000); //delay(100000); delay(120000); animationSection = 0; GIMSK = 0; // Disable pin change interrupt rep = REPS; // Reset animation counter power_timer0_enable(); // Re-enable timer power_usi_enable(); // Re-enable USI Wire.begin(); // Re-init I2C clear(); // Blank display ledCmd(0x21); // Re-enable matrix } } ISR(PCINT0_vect) {} // Button tap 
This is a section of the anim file. I want to be able to set the various colors in these "frames"
// Animation data for Trinket/Gemma + LED matrix backpack jewelry. // Edit this file to change the animation; it's unlikely you'll need // to edit the source code. #define REPS 10 // Number of times to repeat the animation loop (1-255) const int frameSpeed2 = 3; const uint8_t PROGMEM anim2[] = { // Animation bitmaps. Each frame of animation MUST contain // 8 lines of graphics data (there is no error checking for // length). Each line should be prefixed with the letter 'B', // followed by exactly 8 binary digits (0 or 1), no more, // no less (again, no error checking). '0' represents an // 'off' pixel, '1' an 'on' pixel. End line with a comma. B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, B00000000, frameSpeed2, // 0.10 seconds }; 
submitted by pldiguanaman to arduino [link] [comments]

BIP for PoP URI scheme | Kalle Rosenbaum | Jun 06 2015

Kalle Rosenbaum on Jun 06 2015:
Hi
Following earlier posts on Proof of Payment I'm now proposing the following
BIP for a Proof of Payment URI scheme (To read it formatted instead, go to
https://github.com/kallerosenbaum/poppoc/wiki/btcpop-scheme-BIP).
Regards,
Kalle Rosenbaum
BIP:
Title: Proof of Payment URI scheme
Author: Kalle Rosenbaum <kalle at rosenbaum.se>
Status: Draft
Type: Standards Track
Created:
== Abstract ==
This is a proposal for a URI scheme to be used in the Proof of Payment
process.
== Motivation ==
To make a Proof of Payment, the party that wants the proof needs to
transfer a Proof of Payment request to the wallet software of the
other party. To facilitate that transfer, a new URI scheme
representing the PoP request is proposed. This URI can then be encoded
in QR images or sent over NFC in order to transfer it to the wallet.
== Specification ==
The specification is the same as BIP0021, with the following
differences:
the PoP. This could for example be a https: URL or a mailto:
URI.
the transaction to prove.
Just as in BIP0021, elements of the query component may contain
characters outside the valid range. These must first be encoded
according to UTF-8, and then each octet of the corresponding UTF-8
sequence must be percent-encoded as described in RFC 3986.
All parameters except p and n are hints to the
wallet on which transaction to create a PoP for.
The extensibility of BIP0021 applies to this scheme as well. For
example, a date parameter or a toaddr parameter
might be useful. req-* parameters are also allowed and obey
the same rules as in BIP0021, clients not supporting a req-*
parameter must consider the URI invalid.
=== Keep URIs short ===
Implementations should keep the URIs as short as possible. This is
because it makes QR decoding more stable. A camera with a scratched
lens or low resolution may run into problems scanning huge QR
codes. This is why the txid parameter is encoded in Base58
instead of the classic hex encoded string. We get away with 44
characters instead of 64. Also, the nonce parameter is Base58
encoded for the same reason.
== Interpretation ==
=== Transaction hints ===
The wallet processing the URI must use the hints in the PoP request to
filter its transaction set. The label, amount and
message parameters must, if present in the URI, exactly match
the data associated with the original payment according to the
following table:
{|
| btcpop: URI parameter || bitcoin: URI parameter ||
BIP70 PaymentDetails data
|-
| label || label ||
merchant_data
|-
| amount || amount ||
sum of outputs.amount
|-
| message || message ||
memo
|}
The txid parameter value must match the transaction hash of
the payment.
After filtering, the resulting transaction set is displayed to the
user who selects one of them to prove. An implementation could also
automatically select a transaction in the filtered set, but
there must still be a way for the user to select freely among the
matching transactions. If the filtered set is empty, no transaction
fits the hints and a message about that is presented to the user. If
the filtered set contains exactly one transaction, which is
preferable, that transaction can be automatically selected.
As a fallback, there must also be a way for the user to select any
transaction from the wallet regardless of the transaction hints. This
can be useful if the metadata of the wallet is lost, possibly due to a
restore from backup.
=== PoP destination p ===
The p parameter value is the destination where to send the
PoP to. This destination is typically a https: URL or a
http: URL, but it could be any type of URI, for example
mailto:. To keep btcpop: URIs short, users should
not make their p parameter unneccesarily long.
==== http: and https: URLs ====
Wallet implementations must support the http: and
https: schemes in which case POST method must be
used. The content type of the POST request must be set to
Content-Type: application/bitcoin-pop
Content-Transfer-Encoding: binary
== Examples ==
Send PoP for a transaction with label "video 42923" to
https://www.example.com/pop/352>, using nonce 0x73 0xd5
0x1a 0xbb 0xd8 0x9c:
btcpop:?p=
https://www.example.com/pop/352&n=zgWTm8yH&label=video 42923
Send PoP through mail using
mailto:pop at example.com?subject=pop444, amount is 13370000
satoshis, nonce is 0x6f 0xe 0xfb 0x68 0x92 0xf9. Note that
the ? before subject is OK according to RFC3986,
since the query part starts from the first ?:
btcpop:?p=mailto:pop at example.com?subject%3Dpop444&n;=xJdKmEbr&amount;=0.1337
Send PoP for transaction with id
cca7507897abc89628f450e8b1e0c6fca4ec3f7b34cccf55f3f531c659ff4d79
to pizza place at http://pizza.example.com/pop/laszlo111>
using nonce 0xfc 0xcc 0x2c 0x35 0xf0 0xb8
btcpop:?p=
http://pizza.example.com/pop/laszlo111&n=3AtNpVrPh&txid=Emt9MPvt1joznqHy5eEHkNtcuQuYWXzYJBQZN6BJm6NL
== Reference implementation ==
[https://github.com/kallerosenbaum/poppoc poppoc on GitHub]
[https://github.com/kallerosenbaum/wallet Mycelium fork on GitHub]
== References ==
[https://github.com/bitcoin/bips/blob/mastebip-0021.mediawiki BIP21]: URI
Scheme
[[Proof of Payment BIP]]
[https://www.ietf.org/rfc/rfc3986.txt RFC3986]: Uniform Resource Identifier
(URI): Generic Syntax
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TCPdump filter help

I am working on learning to use tcpdump filters without keywords and I think I am doing a pretty good job with these but after trying to check my answers on line I am thinking that I have a few of them slightly wrong but I am not exactly sure. I was hoping that someone could help and explain why my filter is wrong.
Full disclosure I havent tried any of the filters out since I am trying to write them correctly before I test them on real packets. My exam wont allow me access to testing the filters before I submit them.
1. Find all of the packets containing ONLY a “SYN” flag
Tcpdump –n –r testfile.pcap ‘tcp[13] = 2’ or should it be 'tcp[13] 2!=0'
I thought that if it equals 2 the only way for that to happen was if in the binary that bit was set to 1 and then it equals 2 in decimal.
2. Find all of the packets containing a “FIN ACK” flags.
Tcpdump –n –r testfile.pcap ‘tcp[13] = 17’
Same thing here where in binary it would equal 17 with the 5th and 1st bits set to 1?
3. Find all DNS packets.
Tcpdump –n –r testfile.pcap ‘udp[0:2] = 0x35 & upd[2:2] = 0x35’
To capture traffic both ways I need source and destination set to DNS?
4. Find the ICMP Echo requests ONLY.
tcpdump –n –r testfile.pcap ‘icmp[0] = 8’
5.Find any packets that have TCP options.
Tcpdump –n –r testfile.pcap ‘tcp[20:4] > 0’ This one should also work? Any set options would make it greater than 0
submitted by ITBry to AskNetsec [link] [comments]

Reversing and Cracking first simple Program - bin 0x05 ...

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