Fault injection methods and apparatus
View Patent ↗A method of testing a target in a network by fault injection, includes: defining a transaction baseline; modifying at least one of an order and a structure of the transaction baseline to obtain a modified transaction with malformed grammar; and transmitting the modified transaction to a target. The method may further include, receiving a feedback from the target to determine fault occurrence. An apparatus for testing a target in a network by fault injection, includes: a driver configured to generate patterns, where a pattern can generate a plurality of packets for transmission to the target, the pattern being represented by an expression with a literal string and a wild character class; and a network interface coupled to the driver and configured to transmit and receive network traffic.
1. A method of testing a target in a network by fault injection, the method comprising:
defining a transaction baseline;
using the transaction baseline in order to create a supplement transaction;
modifying at least one of an order and a structure of the supplement transaction to obtain a modified transaction with malformed grammar; and
transmitting the modified transaction to a target;
wherein the modifying step comprises:
sending a single character and delimiter-value pair at a repeated large buffer in the transaction.
2. The method of claim 1 , further comprising:
after transmitting the modified transaction, receiving a feedback from the target to determine fault occurrence.
3. The method of claim 1 wherein the modifying step comprises:
removing a field from the transaction.
4. The method of claim 1 wherein the modifying step comprises:
duplicating a field in the transaction.
5. A method of testing a target in a network by fault injection, the method comprising:
defining a transaction baseline;
using the transaction baseline in order to create a supplement transaction;
modifying at least one of an order and a structure of the supplement transaction to obtain a modified transaction with malformed grammar; and
transmitting the modified transaction to a target;
wherein the modifying step comprises:
replacing a delimiter with random ranges that cover the value of the delimiter;
wherein the modifying step comprises:
parsing out a delimiter to obtain an intermediate representation of the transaction, where a value in the transaction is replaced by a buffer function.
6. The method of claim 5 , further comprising:
after transmitting the modified transaction, receiving a feedback from the target to determine fault occurrence.
7. The method of claim 5 wherein the modifying step comprises:
providing alternative character encoding for a character in the transaction baseline.
8. The method of claim 5 wherein the modifying step comprises:
removing a field from the transaction.
9. The method of claim 5 wherein the modifying step comprises:
duplicating a field in the transaction.
10. The method of claim 5 wherein the modifying step comprises:
creating a double delimiter in the transaction.
11. The method of claim 5 wherein the modifying step comprises:
sending an unbalanced pair in the transaction.
12. The method of claim 5 wherein the modifying step comprises:
using an alternative encoding to encode a transaction field with a character that is equal in nature and different in representation.
13. The method of claim 5 wherein the modifying step comprises:
using prefixed escapes in the transaction.
14. The method of claim 5 wherein the modifying step comprises:
using value injection to alter an input field in the transaction.
15. The method of claim 5 wherein the modifying step comprises:
using ghost character encoding in the transaction.
16. The method of claim 5 wherein the modifying step comprises:
determining a value injection based on numerical ranges of the input field content.
17. The method of claim 5 wherein the modifying step comprises:
controlling the user identity which is a field indicating resource name or user identity.
18. The method of claim 5 wherein the modifying step comprises:
injecting unfiltered metacharacters to a secondary process.
19. The method of claim 5 wherein the modifying step comprises:
using extraneous meta-characters for causing misclassification.
20. A method of testing a target in a network by fault injection, the method comprising:
defining a transaction baseline;
using the transaction baseline in order to create a supplement transaction;
modifying at least one of an order and a structure of the supplement transaction to obtain a modified transaction with malformed grammar; and
transmitting the modified transaction to a target;
wherein the modifying step comprises:
parsing out a delimiter to obtain an intermediate representation of the transaction, where a value in the transaction is replaced by a buffer function.
21. The method of claim 20 , further comprising:
after transmitting the modified transaction, receiving a feedback from the target to determine fault occurrence.
22. The method of claim 20 wherein the modifying step comprises:
providing alternative character encoding for a character in the transaction baseline.
23. The method of claim 20 wherein the modifying step comprises:
removing a field from the transaction.
24. The method of claim 20 wherein the modifying step comprises:
duplicating a field in the transaction.
25. The method of claim 20 wherein the modifying step comprises:
creating a double delimiter in the transaction.
26. The method of claim 20 wherein the modifying step comprises:
sending an unbalanced pair in the transaction.
27. The method of claim 20 wherein the modifying step comprises:
replacing a delimiter with random ranges that cover the value of the delimiter.
28. The method of claim 20 wherein the modifying step comprises:
using an alternative encoding to encode a transaction field with a character that is equal in nature and different in representation.
29. The method of claim 20 wherein the modifying step comprises:
using prefixed escapes in the transaction.
30. The method of claim 20 wherein the modifying step comprises:
using value injection to alter an input field in the transaction.
31. The method of claim 20 wherein the modifying step comprises:
using ghost character encoding in the transaction.
32. The method of claim 20 wherein the modifying step comprises:
determining a value injection based on numerical ranges of the input field content.
33. The method of claim 20 wherein the modifying step comprises:
controlling the user identity which is a field indicating resource name or user identity.
34. The method of claim 20 wherein the modifying step comprises:
injecting unfiltered metacharacters to a secondary process.
35. The method of claim 20 wherein the modifying step comprises:
using extraneous meta-characters for causing misclassification.