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Negotiation API
Marios Fragkoulis edited this page Dec 6, 2016
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/* Each tool in the sgsh graph calls dgsh_negotiate() to take part in
* peer-to-peer negotiation.
* The function's return value signifies success (0) or failure (4) of the
* negotiation phase.
*/
enum prot_state
dgsh_negotiate(const char *tool_name, /* Input variable: the program's name */
int *n_input_fds, /* Input/Output variable:
* number of input file descriptors
* required. The number may be changed
* by the API and will reflect the size
* of the input file descriptor array.
* If NULL is provided, then 0 or 1
* is implied and no file descriptor
* array is returned. The input file
* descriptor to return (in case of 1)
* substitutes stdin.
*/
int *n_output_fds,/* Input/Output variable:
* number of output file descriptors
* provided. The semantics for n_input_fds
* apply here respectively.
*/
int **input_fds, /* Output variable:
* input file descriptor array
* The caller has the responsbility
* to free the array.
*/
int **output_fds);/* Output variable:
* output file descriptor array
* The caller has the responsbility
* to free the array.
*/