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libipc-old
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COMPILE \o/

more_to_read
Philippe PITTOLI 2016-06-07 11:45:21 +02:00
parent f0dbecd67f
commit 539d22a72e
6 changed files with 172 additions and 23 deletions
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41
lib/communication.c
View File

@ -85,7 +85,22 @@ int srv_close (struct service *srv)
return 0;
}
int srv_get_new_process (struct process *p, const struct service *srv)
// only get a raw line from TMPDIR/<service>
int srv_get_listen_raw (const struct service *srv, char **buf, size_t *msize)
{
*buf = malloc(BUFSIZ);
bzero (*buf, BUFSIZ);
FILE * f = fopen (srv->spath, "r");
fgets (*buf, BUFSIZ, f);
fclose (f);
*msize = strlen (*buf);
return 0;
}
int srv_get_new_process (const struct service *srv, struct process *p)
{
if (srv->spath == NULL) {
return -1;
@ -135,15 +150,33 @@ int srv_get_new_process (struct process *p, const struct service *srv)
srv_process_gen (p, pid, index, version);
return 1;
return 0;
}
int srv_read (struct process *p, void * buf, size_t * msize)
int srv_read_cb (struct process *p, char ** buf, size_t * msize
, int (*cb)(FILE *f, char ** buf, size_t * msize))
{
if (file_open (&p->out, p->path_out, "rb"))
return 1;
*msize = fread (buf, 1, *msize, p->out); // FIXME check errors
if (cb != NULL)
(*cb) (p->out, buf, msize);
else
*msize = fread (*buf, 1, *msize, p->out); // FIXME check errors
// printf ("DEBUG read, size %ld : %s\n", *msize, *buf);
if (file_close (p->out))
return 1;
return 0;
}
int srv_read (struct process *p, char ** buf, size_t * msize)
{
if (file_open (&p->out, p->path_out, "rb"))
return 1;
*msize = fread (*buf, 1, *msize, p->out); // FIXME check errors
// printf ("DEBUG read, size %ld : %s\n", *msize, buf);
if (file_close (p->out))

7
lib/communication.h
View File

@ -25,7 +25,8 @@ struct service {
void srv_init (struct service *srv, const char *sname);
int srv_get_new_process (struct process *proc, const struct service *srv);
int srv_get_listen_raw (const struct service *srv, char **buf, size_t *msize);
int srv_get_new_process (const struct service *srv, struct process *proc);
/*
* returns
@ -37,7 +38,9 @@ int srv_get_new_process (struct process *proc, const struct service *srv);
int srv_create (struct service *srv);
int srv_close (struct service *srv);
int srv_read (struct process *, void * buf, size_t *);
int srv_read_cb (struct process *p, char ** buf, size_t * msize
, int (*cb)(FILE *f, char ** buf, size_t * msize));
int srv_read (struct process *, char ** buf, size_t *);
int srv_write (struct process *, void * buf, size_t);
// APPLICATION

111
lib/pubsubd.c
View File

@ -177,16 +177,115 @@ void pubsubd_msg_free (struct pubsub_msg *msg)
// COMMUNICATION
void pubsubd_msg_send (struct service *s, struct pubsub_msg * m, struct process *p)
int pubsubd_get_new_process (struct service *srv, struct app_list_elm *ale)
{
if (ale->p != NULL) {
free (ale->p);
}
ale->p = malloc (sizeof (struct process));
char *buf;
size_t msize;
srv_get_listen_raw (srv, &buf, &msize);
// parse pubsubd init msg (sent in TMPDIR/<service>)
//
// line fmt : pid index version chan action
// action : pub | sub
size_t i;
char *str, *token, *saveptr;
pid_t pid;
int index;
int version;
for (str = buf, i = 1; ; str = NULL, i++) {
token = strtok_r(str, " ", &saveptr);
if (token == NULL)
break;
switch (i) {
case 1 : pid = strtoul(token, NULL, 10); break;
case 2 : index = strtoul(token, NULL, 10); break;
case 3 : version = strtoul(token, NULL, 10); break;
case 4 : memcpy (ale->chan, token, strlen (token)); break;
case 5 : {
if (strncmp("pub", token, 3) == 0) {
ale->action = 0;
}
else if (strncmp("sub", token, 3) == 0) {
ale->action = 1;
}
else {
ale->action = 2; // both
}
}
}
}
srv_process_gen (ale->p, pid, index, version);
ale->chanlen = strlen (ale->chan);
return 0;
}
// TODO CBOR
int pubsubd_msg_read_cb (FILE *f, char ** buf, size_t * msize)
{
// msg: "type(1) chanlen(8) chan datalen(8) data
// read
char type;
fread (&type, 1, 1, f);
size_t chanlen;
fread (&chanlen, sizeof (size_t), 1, f);
char *chan = malloc (chanlen);
fread (chan, chanlen, 1, f);
size_t datalen;
fread (&datalen, sizeof (size_t), 1, f);
char *data = malloc (datalen);
fread (data, datalen, 1, f);
*msize = 1 + chanlen;
*buf = malloc(*msize);
// TODO CHECK THIS
size_t i = 0;
char *cbuf = *buf;
cbuf[i] = type; i++;
memcpy (&cbuf[i], &chanlen, sizeof(size_t)); i += sizeof(size_t);
memcpy (&cbuf[i], chan, chanlen); i += chanlen;
memcpy (&cbuf[i], &datalen, sizeof(size_t)); i += sizeof(size_t);
memcpy (&cbuf[i], data, datalen); i += datalen;
return 0;
}
void pubsubd_msg_send (const struct app_list_head *alh, const struct pubsub_msg * m)
{
}
void pubsubd_msg_recv (struct service *s, struct pubsub_msg * m, struct process *p)
void pubsubd_msg_recv (struct process *p, struct pubsub_msg *m)
{
// read the message from the process
size_t mlen;
char *buf;
srv_read_cb (p, &buf, &mlen, pubsubd_msg_read_cb);
pubsubd_msg_unserialize (m, buf, mlen);
free (buf);
}
void pubsub_msg_send (const struct service *s, const struct pubsub_msg * m)
{
}
void pubsub_msg_send (struct service *s, struct pubsub_msg * m)
{
}
void pubsub_msg_recv (struct service *s, struct pubsub_msg * m)
void pubsub_msg_recv (const struct service *s, struct pubsub_msg * m)
{
}

19
lib/pubsubd.h
View File

@ -8,6 +8,12 @@
#define PUBSUB_SERVICE_NAME "pubsub"
struct channel;
struct channels;
struct app_list_head;
struct app_list_elm;
struct pubsub_msg;
struct pubsub_msg {
unsigned char *chan;
size_t chanlen;
@ -20,11 +26,13 @@ void pubsubd_msg_serialize (const struct pubsub_msg *msg, char **data, size_t *l
void pubsubd_msg_unserialize (struct pubsub_msg *msg, const char *data, size_t len);
void pubsubd_msg_free (struct pubsub_msg *msg);
void pubsubd_msg_send (struct service *, struct pubsub_msg *msg, struct process *p);
void pubsubd_msg_recv (struct service *, struct pubsub_msg *msg, struct process *p);
int pubsubd_get_new_process (struct service *srv, struct app_list_elm *ale);
int pubsubd_msg_read_cb (FILE *f, char ** buf, size_t * msize);
void pubsubd_msg_send (const struct app_list_head *alh, const struct pubsub_msg *m);
void pubsubd_msg_recv (struct process *p, struct pubsub_msg *m);
void pubsub_msg_send (struct service *, struct pubsub_msg *msg);
void pubsub_msg_recv (struct service *, struct pubsub_msg *msg);
void pubsub_msg_send (const struct service *, const struct pubsub_msg *msg);
void pubsub_msg_recv (const struct service *, struct pubsub_msg *msg);
// CHANNEL
@ -53,6 +61,9 @@ LIST_HEAD(app_list_head, app_list_elm);
// element of the list
struct app_list_elm {
struct process *p;
char chan[BUFSIZ];
size_t chanlen;
char action; // 0 : pub, 1 : sub, 2 : both
LIST_ENTRY(app_list_elm) entries;
};

7
pingpong/pingpong.c
View File

@ -19,7 +19,7 @@ void main_loop (const struct service *srv)
while (cnt--) {
// -1 : error, 0 = no new process, 1 = new process
ret = srv_get_new_process (&proc, srv);
ret = srv_get_new_process (srv, &proc);
if (ret == -1) {
fprintf (stderr, "error service_get_new_process\n");
continue;
@ -33,8 +33,7 @@ void main_loop (const struct service *srv)
// about the message
size_t msize = BUFSIZ;
char buf[BUFSIZ];
bzero(buf, BUFSIZ);
char *buf;
// printf ("before read\n");
if ((ret = srv_read (&proc, &buf, &msize))) {
@ -45,7 +44,7 @@ void main_loop (const struct service *srv)
printf ("read, size %ld : %s\n", msize, buf);
// printf ("before proc write\n");
if ((ret = srv_write (&proc, &buf, msize))) {
if ((ret = srv_write (&proc, buf, msize))) {
fprintf(stdout, "error service_write %d\n", ret);
continue;
}

10
pubsub/pubsubd.c
View File

@ -18,13 +18,17 @@ main(int argc, char* argv[])
if (srv_create (&srv))
ohshit(1, "service_create error");
// init chans list
struct channels chans;
pubsubd_channels_init (&chans);
for (;;) {
struct process proc;
srv_get_new_process (&proc, &srv);
process_print (&proc);
// for each new process
struct app_list_elm ale;
pubsubd_get_new_process (&srv, &ale);
process_print (ale.p);
// TODO thread to handle multiple clients at a time
}
// the application will shut down, and remove the service named pipe