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Contiki 3.x
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This application is a quick'n'dirty hack for registering, disseminating, and looking up services. More...
Functions | |
| void | servreg_hack_init (void) |
| Initialize and start the servreg-hack application. More... | |
| void | servreg_hack_register (servreg_hack_id_t service_id, const uip_ipaddr_t *addr) |
| Register that this node provides a service. More... | |
| servreg_hack_item_t * | servreg_hack_list_head (void) |
| Obtain the list of services provided by neighbors. More... | |
| servreg_hack_id_t | servreg_hack_item_id (servreg_hack_item_t *item) |
| Get the service ID for a list item. More... | |
| uip_ipaddr_t * | servreg_hack_item_address (servreg_hack_item_t *item) |
| Get the IP address for a list item. More... | |
| uip_ipaddr_t * | servreg_hack_lookup (servreg_hack_id_t service_id) |
| Get the IP address of a node offering a service. More... | |
This application is a quick'n'dirty hack for registering, disseminating, and looking up services.
A service is identified by an 8-bit integer between 1 and 255. Integers below 128 are reserved for system services.
A service is registered with the function servreg_hack_register(). Registered services will be transmitted to all neighbors that run the servreg-hack application. These will in turn resend the registration to their neighbors.
Services from neighbors are stored in a local table. Services stored in the table can be looked up using a combination of the servreg_hack_list() and servreg_hack_item_match() functions.
| void servreg_hack_init | ( | void | ) |
Initialize and start the servreg-hack application.
This function initializes and starts the servreg-hack application and daemon.
Definition at line 119 of file servreg-hack.c.
References list_init(), memb_init(), NULL, and process_start().
Referenced by servreg_hack_lookup(), and servreg_hack_register().
| uip_ipaddr_t * servreg_hack_item_address | ( | servreg_hack_item_t * | item | ) |
Get the IP address for a list item.
| item | The list item |
This function is used when iterating through the list
of registered services. Definition at line 183 of file servreg-hack.c.
Referenced by servreg_hack_lookup().
| servreg_hack_id_t servreg_hack_item_id | ( | servreg_hack_item_t * | item | ) |
Get the service ID for a list item.
| item | The list item |
This function is used when iterating through the list
of registered services. Definition at line 177 of file servreg-hack.c.
Referenced by servreg_hack_lookup(), and servreg_hack_register().
| servreg_hack_item_t * servreg_hack_list_head | ( | void | ) |
Obtain the list of services provided by neighbors.
This function returns a list of services registered by
other nodes. To find a specific service, the caller
needs to iterate through the list and check each list
item with the servreg_hack_item_match() function. Definition at line 170 of file servreg-hack.c.
References list_head().
Referenced by servreg_hack_lookup().
| uip_ipaddr_t * servreg_hack_lookup | ( | servreg_hack_id_t | service_id | ) |
Get the IP address of a node offering a service.
| service_id | The service ID of the service |
This function returns the address of the node offering
a specific service. If the service is not known, the
function returns NULL. If there are more than one nodes
offering the service, this function returns the address
of the node that most recently announced its service.
To get a list of all nodes offering a specific service,
use the servreg_hack_list_head() function to get the
full list of offered services. Definition at line 189 of file servreg-hack.c.
References list_item_next(), NULL, servreg_hack_init(), servreg_hack_item_address(), servreg_hack_item_id(), and servreg_hack_list_head().
| void servreg_hack_register | ( | servreg_hack_id_t | service_id, |
| const uip_ipaddr_t * | addr | ||
| ) |
Register that this node provides a service.
| service_id | The 8-bit ID for the service |
| addr | The address associated with the service This function is used to register a
service. Registering a service means that other nodes
in the network will become aware that this node
provides this service. The servreg-hack application
does not specify what this service means, nor does it
provide any mechanism by which the service can be
reached: this is up to the application that uses the
servreg-hack application. |
Definition at line 132 of file servreg-hack.c.
References etimer_set(), list_head(), list_item_next(), list_push(), memb_alloc(), NULL, PROCESS_CONTEXT_BEGIN, PROCESS_CONTEXT_END, random_rand(), servreg_hack_init(), servreg_hack_item_id(), timer_set(), and uip_ipaddr_copy.
1.8.5