msg format: fonctionne sur les programmes de test (core-test/app/communication-*)

core-test/app/Makefile

@@ -10,7 +10,7 @@ TESTS=$(addsuffix .test, $(EXEC))
 all: $(SOURCES) $(EXEC)
 
 $(EXEC): $(OBJECTS) $(CFILES)
-	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJECTS) $@.c -lcbor -o $@.bin
+	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJECTS) $@.c -o $@.bin
 
 .c.o:
 	$(CC) -c $(CFLAGS) $< -o $@

core-test/app/communication-client.c

@@ -2,26 +2,18 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include "../../core/msg.h"
+#include "../../core/error.h"
 #include "../../core/communication.h"
 
-#define handle_err(fun,msg)\
-    fprintf (stderr, "%s: file %s line %d %s\n", fun, __FILE__, __LINE__, msg);
-
 #define MSG "coucou"
 #define SERVICE_NAME "test"
 
 int main (int argc, char *argv[], char *env[])
 {
 
-    size_t msize = BUFSIZ;
+    struct msg m;
-    char *buf = NULL;
+    memset (&m, 0, sizeof (struct msg));
-
-    if ( (buf = malloc (BUFSIZ)) == NULL) {
-        handle_err ("main", "malloc");
-        return EXIT_FAILURE;
-    }
-    memset (buf, 0, BUFSIZ);
-
     struct service srv;
     memset (&srv, 0, sizeof (struct service));
 
@@ -36,25 +28,27 @@ int main (int argc, char *argv[], char *env[])
     }
 
     printf ("msg to send: %s\n", MSG);
-    if (app_write (&srv, MSG, strlen(MSG)) < 0) {
+    msg_format_data (&m, MSG, strlen(MSG) +1);
+    printf ("msg to send in the client: ");
+    print_msg (&m);
+    if (app_write (&srv, &m) < 0) {
         handle_err("main", "app_write < 0");
         return EXIT_FAILURE;
     }
+    msg_free (&m);
 
-    if (app_read (&srv, &buf, &msize) < 0) {
+    if (app_read (&srv, &m) < 0) {
         handle_err("main", "app_read < 0");
         return EXIT_FAILURE;
     }
 
-    printf ("msg recv: %s\n", buf);
+    printf ("msg recv: %s\n", m.val);
+    msg_free (&m);
 
     if (app_close (&srv) < 0) {
         handle_err("main", "app_close < 0");
         return EXIT_FAILURE;
     }
 
-    if (buf != NULL)
-        free (buf);
-
     return EXIT_SUCCESS;
 }

core-test/app/communication-server.c

@@ -2,26 +2,17 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include "../../core/error.h"
 #include "../../core/communication.h"
 
-#define handle_err(fun,msg)\
-    fprintf (stderr, "%s: file %s line %d %s\n", fun, __FILE__, __LINE__, msg);
-
 #define MSG "coucou"
 #define SERVICE_NAME "test"
 
 int main (int argc, char *argv[], char *env[])
 {
 
-    size_t msize = BUFSIZ;
+    struct msg m;
-    char *buf = NULL;
+    memset (&m, 0, sizeof (struct msg));
-
-    if ( (buf = malloc (BUFSIZ)) == NULL) {
-        handle_err ("main", "malloc");
-        return EXIT_FAILURE;
-    }
-    memset (buf, 0, BUFSIZ);
-
     struct service srv;
     memset(&srv, 0, sizeof (struct service));
 
@@ -43,17 +34,31 @@ int main (int argc, char *argv[], char *env[])
         return EXIT_FAILURE;
     }
 
-    if (srv_read (&p, &buf, &msize) < 0) {
+    if (srv_read (&p, &m) < 0) {
         handle_err("main", "srv_read < 0");
         return EXIT_FAILURE;
     }
 
-    printf ("msg recv: %s\n", buf);
+    printf ("msg recv: %s\n", m.val);
 
-    if (srv_write (&p, buf, msize) < 0) {
+    if (srv_write (&p, &m) < 0) {
         handle_err("main", "srv_write < 0");
         return EXIT_FAILURE;
     }
+    msg_free (&m);
+
+    // client quits
+    if (srv_read (&p, &m) < 0) {
+        handle_err("main", "srv_read < 0");
+        return EXIT_FAILURE;
+    }
+    if (m.type == MSG_TYPE_DIS) {
+        printf ("the client quits\n");
+    }
+    else {
+        fprintf (stderr, "err: should have received the client dis msg\n");
+    }
+    msg_free (&m);
 
     if (srv_close_proc (&p) < 0) {
         handle_err("main", "srv_close_proc < 0");
@@ -65,8 +70,5 @@ int main (int argc, char *argv[], char *env[])
         return EXIT_FAILURE;
     }
 
-    if (buf != NULL)
-        free (buf);
-
     return EXIT_SUCCESS;
 }

core/communication.c

@@ -69,13 +69,6 @@ int srv_close (struct service *srv)
 
 int srv_close_proc (struct process *p)
 {
-    struct msg m;
-    memset (&m, 0, sizeof (struct msg));
-    m.type = MSG_TYPE_DIS;
-    if (msg_write (p->proc_fd, &m) < 0) {
-        handle_err ("srv_close_proc", "msg_write < 0");
-    }
-
     return usock_close (p->proc_fd);
 }
 

core/msg.c

@@ -4,12 +4,16 @@
 
 #include <assert.h>
 
+void print_msg (const struct msg *m)
+{
+    assert (m != NULL);
+    printf ("msg: type %d len %d\n", m->type, m->valsize);
+}
+
 int msg_format_read (struct msg *m, const char *buf, size_t msize)
 {
     assert (m != NULL);
     assert (buf != NULL);
-    assert (msize >= 3);
-
     assert (msize <= BUFSIZ - 3);
 
     if (m == NULL)
@@ -19,11 +23,13 @@ int msg_format_read (struct msg *m, const char *buf, size_t msize)
     memcpy (&m->valsize, buf+1, 2);
 
     assert (m->valsize <= BUFSIZ -3);
+    // printf ("type %d : msize = %ld, valsize = %d\n", m->type, msize, m->valsize);
+    assert (m->valsize == msize - 3);
 
     if (m->val != NULL)
         free (m->val), m->val = NULL;
 
-    if (m->val == NULL) {
+    if (m->val == NULL && m->valsize > 0) {
         m->val = malloc (m->valsize);
         memcpy (m->val, buf+3, m->valsize);
     }
@@ -31,7 +37,7 @@ int msg_format_read (struct msg *m, const char *buf, size_t msize)
     return 0;
 }
 
-int msg_format_write (struct msg *m, char **buf, size_t *msize)
+int msg_format_write (const struct msg *m, char **buf, size_t *msize)
 {
     assert (m != NULL);
     assert (buf != NULL);
@@ -47,11 +53,17 @@ int msg_format_write (struct msg *m, char **buf, size_t *msize)
     if (msize == NULL)
         return -3;
 
+    if (*buf == NULL) {
+        *buf = malloc (3 + m->valsize);
+    }
+
     char *buffer = *buf;
 
     buffer[0] = m->type;
     memcpy (buffer + 1, &m->valsize, 2);
-    memcpy (buffer + 3, &m->val, (m->valsize <= BUFSIZ) ? m->valsize : BUFSIZ);
+    memcpy (buffer + 3, m->val, m->valsize);
+
+    *msize = 3 + m->valsize;
 
     return 0;
 }
@@ -61,7 +73,7 @@ int msg_read (int fd, struct msg *m)
     assert (m != NULL);
 
     char *buf = NULL;
-    size_t msize = 0;
+    size_t msize = BUFSIZ;
 
     int ret = usock_recv (fd, &buf, &msize);
     if (ret < 0) {
@@ -74,6 +86,9 @@ int msg_read (int fd, struct msg *m)
     }
     free (buf);
 
+    // printf ("msg received: ");
+    // print_msg (m);
+
     return 0;
 }
 
@@ -81,10 +96,14 @@ int msg_write (int fd, const struct msg *m)
 {
     assert (m != NULL);
 
+    // printf ("msg to write: ");
+    // print_msg (m);
+
     char *buf = NULL;
     size_t msize = 0;
     msg_format_write (m, &buf, &msize);
 
+    // printf ("msg to send, real size %ld\n", msize);
     int ret = usock_send (fd, buf, msize);
     if (ret < 0) {
         handle_err ("msg_write", "usock_send");
@@ -103,7 +122,7 @@ int msg_format (struct msg *m, char type, const char *val, size_t valsize)
 {
     assert (m != NULL);
     assert (valsize + 3 <= BUFSIZ);
-    assert (valsize == 0 && val == NULL || valsize > 0 && val != NULL);
+    assert ((valsize == 0 && val == NULL) || (valsize > 0 && val != NULL));
 
     if (valsize + 3 > BUFSIZ) {
         handle_err ("msg_format_con", "msgsize > BUFSIZ");
@@ -112,6 +131,10 @@ int msg_format (struct msg *m, char type, const char *val, size_t valsize)
 
     m->type = type;
     m->valsize = (short) valsize;
+
+    if (m->val == NULL)
+        m->val = malloc (valsize);
+
     memcpy (m->val, val, valsize);
     return 0;
 }
@@ -139,7 +162,9 @@ int msg_free (struct msg *m)
         return -1;
 
     if (m->val != NULL)
-        free (m->val);
+        free (m->val), m->val = NULL;
+
+    m->valsize = 0;
 
     return 0;
 }

core/msg.h

@@ -20,7 +20,7 @@ struct msg {
 // used to create msg structure from buffer
 int msg_format_read (struct msg *m, const char *buf, size_t msize);
 // used to create buffer from msg structure
-int msg_format_write (struct msg *m, char **buf, size_t *msize);
+int msg_format_write (const struct msg *m, char **buf, size_t *msize);
 
 // read a structure msg from fd
 int msg_read (int fd, struct msg *m);
@@ -32,5 +32,6 @@ int msg_format_data (struct msg *m, const char *val, size_t valsize);
 int msg_format_ack (struct msg *m, const char *val, size_t valsize);
 
 int msg_free (struct msg *m);
+void print_msg (const struct msg *m);
 
 #endif

core/usocket.c

@@ -1,18 +1,16 @@
 #include "usocket.h"
 #include "utils.h"
+#include "error.h"
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
 #include <unistd.h>
 #include <assert.h>
 
-#define handle_err(fun,msg)\
-    fprintf (stderr, "%s: file %s line %d %s\n", fun, __FILE__, __LINE__, msg);
-
 int usock_send (const int fd, const char *buf, const int msize)
 {
     print_hexa ("msg send", (unsigned char *)buf, msize);
-    printf ("msg to send: (%d) \n", msize);
     fflush(stdout);
 
     int ret = 0;
@@ -42,6 +40,8 @@ int usock_recv (const int fd, char **buf, size_t *msize)
         // do not allocate too much memory
         if (*msize > BUFSIZ)
             handle_err ("usock_recv", "msize > BUFSIZ");
+        if (*msize == 0)
+            *msize = BUFSIZ;
         *buf = malloc ((*msize < BUFSIZ) ? *msize : BUFSIZ);
     }
 
@@ -54,6 +54,7 @@ int usock_recv (const int fd, char **buf, size_t *msize)
     }
     *msize = (size_t) ret;
     print_hexa ("msg recv", (unsigned char *)*buf, *msize);
+    fflush(stdout);
     return ret;
 }