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libipc-old
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Philippe PITTOLI 2019-06-04 01:35:33 +02:00
parent 75c00d229e
commit a8d0a82adf
4 changed files with 18 additions and 14 deletions
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4
examples/pong.c
View File

@ -35,7 +35,7 @@ void non_interactive (char *env[])
}
printf ("msg to send (%ld): %.*s\n", (ssize_t) strlen(MSG) +1, (int) strlen(MSG), MSG);
ret = ipc_message_format_data (&m, MSG, (ssize_t) strlen(MSG) +1);
ret = ipc_message_format_data (&m, 42, MSG, (ssize_t) strlen(MSG) +1);
if (ret != IPC_ERROR_NONE) {
PRINTERR(ret, "message format data");
exit (EXIT_FAILURE);
@ -58,7 +58,7 @@ void non_interactive (char *env[])
exit (EXIT_FAILURE);
}
printf ("msg recv: %s\n", m.payload);
printf ("msg recv (type: %u): %s\n", m.user_type, m.payload);
ipc_message_empty (&m);
ret = ipc_close (&srv);

4
src/communication.h
View File

@ -1,4 +0,0 @@
#ifndef __IPC_COMMUNICATION_H__
#define __IPC_COMMUNICATION_H__
#endif

10
src/ipc.h
View File

@ -11,7 +11,7 @@
#define RUNDIR "/run/ipc/"
#define PATH_MAX 4096
#define IPC_HEADER_SIZE 5
#define IPC_HEADER_SIZE 6
#define IPC_MAX_MESSAGE_SIZE 8000000-IPC_HEADER_SIZE
// #define IPC_MAX_MESSAGE_SIZE 100-IPC_HEADER_SIZE
// #include "queue.h"
@ -146,6 +146,7 @@ struct ipc_connection_infos {
struct ipc_message {
char type;
char user_type;
uint32_t length;
char *payload;
};
@ -211,7 +212,6 @@ enum ipc_errors ipc_connection (char **env, struct ipc_connection_info *srv, c
enum ipc_errors ipc_server_close (struct ipc_connection_info *srv);
enum ipc_errors ipc_close (struct ipc_connection_info *p);
enum ipc_errors ipc_accept (struct ipc_connection_info *srv, struct ipc_connection_info *p);
enum ipc_errors ipc_read (const struct ipc_connection_info *, struct ipc_message *m);
enum ipc_errors ipc_write (const struct ipc_connection_info *, const struct ipc_message *m);
@ -259,8 +259,10 @@ enum ipc_errors ipc_message_read (int32_t fd, struct ipc_message *m);
// write a structure msg to fd
enum ipc_errors ipc_message_write (int32_t fd, const struct ipc_message *m);
enum ipc_errors ipc_message_format (struct ipc_message *m, char type, const char *payload, ssize_t length);
enum ipc_errors ipc_message_format_data (struct ipc_message *m, const char *payload, ssize_t length);
enum ipc_errors ipc_message_format (struct ipc_message *m
, char type, char utype, const char *payload, ssize_t length);
enum ipc_errors ipc_message_format_data (struct ipc_message *m
, char utype, const char *payload, ssize_t length);
enum ipc_errors ipc_message_format_server_close (struct ipc_message *m);
enum ipc_errors ipc_message_empty (struct ipc_message *m);

14
src/message.c
View File

@ -56,8 +56,11 @@ enum ipc_errors ipc_message_format_read (struct ipc_message *m, const char *buf,
return IPC_ERROR_MESSAGE_FORMAT_READ__MESSAGE_SIZE;
}
// message format:
// Type (1 B) | Length (4 B) | UserType (1 B) | Payload (Length B)
m->type = buf[0];
memcpy (&m->length, buf+1, sizeof m->length);
m->user_type = buf[1 + sizeof m->length];
assert (m->length <= IPC_MAX_MESSAGE_SIZE);
#if defined(IPC_WITH_ERRORS) && IPC_WITH_ERRORS > 2
@ -106,6 +109,7 @@ enum ipc_errors ipc_message_format_write (const struct ipc_message *m, char **bu
buffer[0] = m->type;
memcpy (buffer + 1, &m->length, sizeof m->length);
buffer[1 + sizeof m->length] = m->user_type;
if (m->payload != NULL) {
memcpy (buffer + IPC_HEADER_SIZE, m->payload, m->length);
}
@ -185,7 +189,8 @@ enum ipc_errors ipc_message_write (int32_t fd, const struct ipc_message *m)
// MSG FORMAT
enum ipc_errors ipc_message_format (struct ipc_message *m, char type, const char *payload, ssize_t length)
enum ipc_errors ipc_message_format (struct ipc_message *m
, char type, char utype, const char *payload, ssize_t length)
{
assert (m != NULL);
assert (length <= IPC_MAX_MESSAGE_SIZE);
@ -206,6 +211,7 @@ enum ipc_errors ipc_message_format (struct ipc_message *m, char type, const char
}
m->type = type;
m->user_type = utype;
m->length = (uint32_t) length;
if (payload != NULL) {
@ -226,14 +232,14 @@ enum ipc_errors ipc_message_format (struct ipc_message *m, char type, const char
return IPC_ERROR_NONE;
}
enum ipc_errors ipc_message_format_data (struct ipc_message *m, const char *payload, ssize_t length)
enum ipc_errors ipc_message_format_data (struct ipc_message *m, char utype, const char *payload, ssize_t length)
{
return ipc_message_format (m, MSG_TYPE_DATA, payload, length);
return ipc_message_format (m, MSG_TYPE_DATA, utype, payload, length);
}
enum ipc_errors ipc_message_format_server_close (struct ipc_message *m)
{
return ipc_message_format (m, MSG_TYPE_SERVER_CLOSE, NULL, 0);
return ipc_message_format (m, MSG_TYPE_SERVER_CLOSE, 0, NULL, 0);
}
enum ipc_errors ipc_message_empty (struct ipc_message *m)