118 lines
4.1 KiB
C
118 lines
4.1 KiB
C
#ifndef __PUBSUBD_H__
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#define __PUBSUBD_H__
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#include "communication.h"
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#include "process.h"
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#include "queue.h"
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#define PUBSUB_TYPE_DISCONNECT 1 << 0
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#define PUBSUB_TYPE_INFO 1 << 1
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#define PUBSUB_TYPE_DEBUG 1 << 2
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#define PUBSUB_TYPE_MESSAGE 1 << 3
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#define PUBSUB_SERVICE_NAME "pubsub"
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struct channel;
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struct channels;
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struct app_list_head;
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struct app_list_elm;
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struct pubsub_msg;
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struct pubsub_msg {
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unsigned char *chan;
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size_t chanlen;
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unsigned char *data;
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size_t datalen;
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unsigned char type; // message type : alert, notification, …
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};
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void pubsubd_msg_serialize (const struct pubsub_msg *msg, char **data, size_t *len);
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void pubsubd_msg_unserialize (struct pubsub_msg *msg, const char *data, size_t len);
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void pubsubd_msg_free (struct pubsub_msg *msg);
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void pubsubd_msg_print (const struct pubsub_msg *msg);
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// parse pubsubd init msg (sent in TMPDIR/<service>)
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//
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// line fmt : pid index version action chan
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// action : quit | pub | sub
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int pubsubd_get_new_process (const char *spath, struct app_list_elm *ale
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, struct channels *chans, struct channel **c);
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int pubsubd_msg_read_cb (FILE *f, char ** buf, size_t * msize);
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void pubsubd_msg_send (const struct app_list_head *alh, const struct pubsub_msg *m);
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void pubsubd_msg_recv (struct process *p, struct pubsub_msg *m);
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void pubsub_disconnect (struct process *p);
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void pubsub_msg_send (struct process *p, const struct pubsub_msg *msg);
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void pubsub_msg_recv (struct process *p, struct pubsub_msg *msg);
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// CHANNEL
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// head of the list
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LIST_HEAD(channels, channel);
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// element of the list
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// channel : chan name + chan name length + a list of applications
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struct channel {
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char *chan;
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size_t chanlen;
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struct app_list_head *alh;
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LIST_ENTRY(channel) entries;
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};
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// simple channel
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int pubsubd_channel_new (struct channel *c, const char *name);
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struct channel * pubsubd_channel_copy (struct channel *c);
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struct channel * pubsubd_channel_get (struct channels *chans, struct channel *c);
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void pubsubd_channel_free (struct channel *c);
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int pubsubd_channel_eq (const struct channel *c1, const struct channel *c2);
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void pubsubd_channel_print (const struct channel *c);
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// list of channels
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void pubsubd_channels_init (struct channels *chans);
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void pubsubd_channels_print (const struct channels *chans);
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struct channel * pubsubd_channels_add (struct channels *chans, struct channel *c);
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void pubsubd_channels_del (struct channels *chans, struct channel *c);
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void pubsubd_channels_del_all (struct channels *chans);
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// remove an app_list_elm from the list (msg type DISCONNECT received)
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int pubsubd_channels_del_subscriber (struct channels *chans
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, struct channel *c);
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struct channel *
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pubsubd_channels_search_from_app_list_elm (struct channels *chans
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, struct app_list_elm *ale);
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// APPLICATION
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// head of the list
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LIST_HEAD(app_list_head, app_list_elm);
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enum app_list_elm_action {PUBSUB_QUIT = 1, PUBSUB_PUB, PUBSUB_SUB, PUBSUB_BOTH};
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// element of the list
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struct app_list_elm {
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struct process *p;
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enum app_list_elm_action action;
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LIST_ENTRY(app_list_elm) entries;
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};
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int
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pubsubd_subscriber_eq (const struct app_list_elm *, const struct app_list_elm *);
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void pubsubd_subscriber_init (struct app_list_head **chans);
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void pubsubd_subscriber_add (struct app_list_head *
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, const struct app_list_elm *);
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struct app_list_elm * pubsubd_subscriber_get (const struct app_list_head *
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, const struct app_list_elm *);
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int pubsubd_subscriber_del (struct app_list_head *al, struct app_list_elm *p);
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void pubsubd_subscriber_del_all (struct app_list_head *alh);
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struct app_list_elm * pubsubd_app_list_elm_copy (const struct app_list_elm *ale);
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void pubsubd_app_list_elm_create (struct app_list_elm *ale, struct process *p);
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void pubsubd_app_list_elm_free (struct app_list_elm *todel);
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void pubsub_connection (struct service *srv, struct process *p, enum app_list_elm_action action, const char *channame);
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void pubsubd_quit (struct service *srv);
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#endif
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