remoted & remotec: compilation, connection to remoted serv

pubsub/lib/pubsubd.c

@@ -55,6 +55,10 @@ void pubsubd_send (const struct array_proc *ap, const struct pubsub_msg * m)
 //     msg_free (&m_data);
 // }
 
+/**
+ * new connection, once accepted the process is added to the array_proc
+ * structure to be checked periodically for new messages
+ */
 void handle_new_connection (struct service *srv, struct array_proc *ap)
 {
     struct process *p = malloc(sizeof(struct process));

remote/app/README.md

@@ -4,6 +4,9 @@ This service creates a path on the relevent remote location, going through anyth
 
 # TODO
 
+* authorizations
+* code the -d option
+
 ### authorizations
 
 The idea is to have a simple configuration file for authentication of remote connections, such as:

remote/app/remotec.c

@@ -1,9 +1,8 @@
-// int main(void) { return 0; }
-
 #include "../../core/communication.h"
 #include "../../core/error.h"
 #include "../lib/remoted.h"
-#include "../lib/remote.h"
+#include "../lib/remotec.h"
+#include "../lib/msg.h"
 
 #include <stdlib.h>
 #include <pthread.h>
@@ -31,8 +30,8 @@ void * listener (void *params)
 
     // main loop
     while (1) {
-        struct remote_msg m;
+        struct remoted_msg m;
-        memset (&m, 0, sizeof (struct remote_msg));
+        memset (&m, 0, sizeof (struct remoted_msg));
 
         remote_msg_recv (srv, &m);
         printf ("\r\033[31m>\033[00m %s\n", m.data);
@@ -55,31 +54,30 @@ void main_loop (int argc, char **argv, char **env
     (void) argv;
     (void) env;
 
-#if 0
     struct service srv;
     memset (&srv, 0, sizeof (struct service));
 
-    remote_connection (argc, argv, env, &srv);
+    remotec_connection (argc, argv, env, &srv);
-    printf ("connected\n");
+    log_debug ("remotec connected");
+    log_debug ("remotec main loop");
 
-    printf ("main_loop\n");
+    struct remoted_msg msg;
-
+    memset (&msg, 0, sizeof (struct remoted_msg));
-    struct remote_msg msg;
-    memset (&msg, 0, sizeof (struct remote_msg));
 
+#if 0
     // msg loop
     for (;;) {
         char buf[BUFSIZ];
         memset (buf, 0, BUFSIZ);
 
-        msg.datalen = /* TODO  */0;
+        /* TODO  */
-        msg.data = /* TODO */ NULL;
+        msg.datalen = 5; // FIXME: take parameters into account
+        msg.data = malloc (msg.datalen);
         memset (msg.data, 0, msg.datalen);
-        strncpy ((char *) msg.data, /* TODO */NULL, msg.datalen);
+        strncpy ((char *) msg.data, "salut", msg.datalen);
-        msg.data[msg.datalen -1] = '\0';
 
         /* TODO */
-        remote_msg_send (&srv, &msg);
+        remotec_msg_send (&srv, &msg);
         free (msg.data);
         msg.data = NULL;
         msg.datalen = 0;
@@ -87,11 +85,11 @@ void main_loop (int argc, char **argv, char **env
 
     // free everything
     remote_msg_free (&msg);
-
-    printf ("disconnection...\n");
-    // disconnect from the server
-    remote_disconnect (&srv);
 #endif
+
+    log_debug ("remotec disconnection...");
+    // disconnect from the server
+    remotec_disconnection (&srv);
 }
 
 int main(int argc, char **argv, char **env)

remote/app/remoted.c

@@ -11,6 +11,8 @@
 #include <unistd.h>
 #include <signal.h>
 
+#include <stdio.h>
+
 // to quit them properly if a signal occurs
 struct service srv;
 
@@ -25,14 +27,42 @@ void handle_signal (int signalnumber)
     exit (EXIT_SUCCESS);
 }
 
+void usage ()
+{
+    fprintf (stderr, "remoted [-d <unix-socket-dir>] [-h]\n");
+}
+
 /* TODO: handle command line arguments */
+
+// cmdline: remoted -d <unix-socket-dir>
 void remoted_cmd_args (int argc, char **argv, char **env
         , struct remoted_ctx *ctx)
 {
-    (void) argc;
-    (void) argv;
     (void) env;
     (void) ctx;
+
+    int c;
+    while ( (c = getopt(argc, argv, "hd:")) != -1) {
+        switch (c) {
+            case 'd':
+                ctx->unix_socket_dir = malloc (strlen (optarg) +1);
+                strncpy (ctx->unix_socket_dir, optarg, strlen (optarg));
+                log_debug ("remoted unix socket dir: %s", ctx->unix_socket_dir);
+                break;
+            case '?':
+            case 'h':
+                usage ();
+                exit (EXIT_FAILURE);
+            default:
+                log_debug ("remoted getopt returned character code 0%o ??\n", c);
+        }
+    }
+
+    if (optind < argc) {
+        log_debug ("remoted non-option ARGV-elements:");
+        while (optind < argc)
+            log_debug ("\t%s", argv[optind++]);
+    }
 }
 
 /* TODO: handle authorizations */
@@ -42,9 +72,7 @@ int remoted_auth_conf (struct remoted_ctx *ctx)
     return 0;
 }
 
-
+int main(int argc, char **argv, char **env)
-int
-main(int argc, char **argv, char **env)
 {
     struct remoted_ctx ctx;
     memset (&ctx, 0, sizeof (struct remoted_ctx));
@@ -75,7 +103,7 @@ main(int argc, char **argv, char **env)
     // TODO: here comes pledge (openbsd)
 
     // the service will loop until the end of time, a specific message, a signal
-    remoted_main_loop (&srv);
+    remoted_main_loop (&srv, &ctx);
 
     // the application will shut down, and remove the service unix socket
     if (srv_close (&srv) < 0) {
@@ -83,5 +111,7 @@ main(int argc, char **argv, char **env)
     }
     log_info ("remoted ended");
 
+    remoted_free_ctx (&ctx);
+
     return EXIT_SUCCESS;
 }

remote/lib/msg.c

@@ -0,0 +1,109 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "msg.h"
+#include "../../core/error.h"
+
+void remote_msg_serialize (const struct remoted_msg *msg, char **data, size_t *len)
+{
+    if (msg == NULL) {
+        handle_err ("remote remote_msg_serialize", "msg == NULL");
+        return;
+    }
+
+    if (data == NULL) {
+        handle_err ("remote remote_msg_serialize", "data == NULL");
+        return;
+    }
+
+    if (*data != NULL) {
+        handle_err ("remote remote_msg_serialize", "*data != NULL");
+        return;
+    }
+
+    if (len == NULL) {
+        handle_err ("remote remote_msg_serialize", "len == NULL");
+        return;
+    }
+
+    // buflen = remote msg type (1) + size_t (16) + data
+    size_t buflen = 1 + sizeof (size_t) + msg->datalen;
+
+    if (buflen > BUFSIZ) {
+        handle_err ("remote remote_msg_serialize", "datalen too high");
+        return;
+    }
+
+    char *buf = malloc (buflen);
+    memset (buf, 0, buflen);
+
+    size_t offset = 0;
+
+    // msg type
+    buf[offset++] = msg->type;
+
+    // data
+    memcpy (buf + offset, &msg->datalen, sizeof (size_t));
+    offset += sizeof (size_t);
+    memcpy (buf + offset, msg->data, msg->datalen);
+    offset += msg->datalen;
+
+    *data = buf;
+    *len = buflen;
+}
+
+void remote_msg_unserialize (struct remoted_msg *msg, const char *buf, size_t mlen)
+{
+    if (msg == NULL) {
+        handle_err ("remote remote_msg_unserialize", "msg == NULL");
+        return;
+    }
+
+    remote_msg_free (msg);
+
+    if (mlen > BUFSIZ) {
+        handle_err ("remote remote_msg_unserialize", "mlen > BUFSIZ");
+        return;
+    }
+
+    size_t offset = 0;
+
+    // msg type
+    msg->type = buf[offset++];
+
+    // data
+    memcpy (&msg->datalen, buf + offset, sizeof (size_t));
+    if (msg->datalen > BUFSIZ) {
+        handle_err ("remote remote_msg_unserialize", "datalen > BUFSIZ");
+        return;
+    }
+    msg->data = malloc (msg->datalen);
+    memset (msg->data, 0, msg->datalen);
+    offset += sizeof (size_t);
+    memcpy (msg->data, buf + offset, msg->datalen);
+    offset += msg->datalen;
+}
+
+void remote_msg_free (struct remoted_msg *msg)
+{
+    if (msg == NULL) {
+        handle_err ("remote remote_msg_free", "msg == NULL");
+        return;
+    }
+
+    if (msg->data) {
+        free (msg->data);
+        msg->data = NULL;
+    }
+}
+
+void remote_msg_print (const struct remoted_msg *msg)
+{
+    if (msg == NULL) {
+        handle_err ("remote remote_msg_print", "msg == NULL");
+        return;
+    }
+
+    printf ("msg: type=%d data=%s\n", msg->type, msg->data);
+}

remote/lib/msg.h

@@ -0,0 +1,20 @@
+#ifndef __REMOTE_MSG_H__
+#define __REMOTE_MSG_H__
+
+#define REMOTE_MSG_TYPE_CONNECT     1
+#define REMOTE_MSG_TYPE_LISTEN      2
+#define REMOTE_MSG_TYPE_PUB         3
+
+struct remoted_msg {
+    unsigned char type; // message types = commands (connect, listen, ...)
+    char *data;
+    size_t datalen;
+};
+
+void remote_msg_serialize (const struct remoted_msg *msg, char **data, size_t *len);
+void remote_msg_unserialize (struct remoted_msg *msg, const char *data, size_t len);
+
+void remote_msg_free (struct remoted_msg *msg);
+void remote_msg_print (const struct remoted_msg *msg);
+
+#endif

remote/lib/remote.h

@@ -1,9 +0,0 @@
-#ifndef __REMOTE_H__
-#define __REMOTE_H__
-
-#include "../../core/process.h"
-#include "../../core/msg.h"
-
-/* TODO */
-
-#endif

remote/lib/remotec.c

@@ -0,0 +1,74 @@
+#include "../../core/communication.h"
+#include "../../core/error.h"
+#include "msg.h"
+#include "remotec.h"
+#include "remoted.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int remotec_connection (int argc, char **argv, char **env, struct service *srv)
+{
+    int ret = app_connection (argc, argv, env
+            , srv, REMOTED_SERVICE_NAME, NULL, 0);
+
+    if (ret != 0) {
+        handle_err ("remote remotec_connection", "app_connection != 0");
+    }
+
+    return ret;
+}
+
+int remotec_disconnection (struct service *srv)
+{
+    return app_close (srv);
+}
+
+int remotec_msg_send (struct service *srv, const struct remoted_msg * m)
+{
+    size_t msize = 0;
+    char * buf = NULL;
+    remote_msg_serialize (m, &buf, &msize);
+
+    struct msg m_data;
+    memset (&m_data, 0, sizeof (struct msg));
+
+    // format the connection msg
+    if (msg_format_data (&m_data, buf, msize) < 0) {
+        handle_err ("remotec_msg_send", "msg_format_data");
+        if (buf != NULL)
+            free (buf);
+        return -1;
+    }
+
+    app_write (srv, &m_data);
+    msg_free (&m_data);
+
+    if (buf != NULL)
+        free(buf);
+
+    return 0;
+}
+
+int remotec_msg_recv (struct service *srv, struct remoted_msg *m)
+{
+    if (srv == NULL) {
+        handle_err ("remotec_msg_recv", "srv == NULL");
+        return -1;
+    }
+
+    if (m == NULL) {
+        handle_err ("remotec_msg_recv", "m == NULL");
+        return -1;
+    }
+
+    struct msg m_recv;
+    memset (&m_recv, 0, sizeof (struct msg));
+
+    app_read (srv, &m_recv);
+    remote_msg_unserialize (m, m_recv.val, m_recv.valsize);
+
+    msg_free (&m_recv);
+
+    return 0;
+}

remote/lib/remotec.h

@@ -0,0 +1,16 @@
+#ifndef __REMOTEC_H__
+#define __REMOTEC_H__
+
+#include "../../core/process.h"
+#include "../../core/msg.h"
+#include "remoted.h"
+
+/* TODO */
+
+int remotec_connection (int argc, char **argv, char **env, struct service *srv);
+int remotec_disconnection (struct service *srv);
+
+int remotec_msg_send (struct service *srv, const struct remoted_msg *msg);
+int remotec_msg_recv (struct service *srv, struct remoted_msg *msg);
+
+#endif

remote/lib/remoted.c

@@ -11,9 +11,139 @@
 #include <sys/un.h>
 #include <unistd.h>
 
-void remoted_main_loop (struct service *srv)
+/**
+ * new connection, once accepted the process is added to the array_proc
+ * structure to be checked periodically for new messages
+ */
+void handle_new_connection (struct service *srv, struct array_proc *ap)
 {
-    (void) srv;
+    struct process *p = malloc(sizeof(struct process));
-    log_debug ("remoted entering main loop");
+    memset(p, 0, sizeof(struct process));
-    /* TODO */
+
+    if (srv_accept (srv, p) < 0) {
+        handle_error("srv_accept < 0");
+    } else {
+        log_debug ("remoted, new connection", p->proc_fd);
+    }
+
+    if (add_proc (ap, p) < 0) {
+        handle_error("add_proc < 0");
+    }
+}
+
+void handle_new_msg (struct array_proc *ap, struct array_proc *proc_to_read)
+{
+    struct msg m;
+    memset (&m, 0, sizeof (struct msg));
+    int i;
+    for (i = 0; i < proc_to_read->size; i++) {
+        if (srv_read (proc_to_read->tab_proc[i], &m) < 0) {
+            handle_error("srv_read < 0");
+        }
+
+        mprint_hexa ("msg received: ", (unsigned char *) m.val, m.valsize);
+
+        // close the process then delete it from the process array
+        if (m.type == MSG_TYPE_CLOSE) {
+            struct process *p = proc_to_read->tab_proc[i];
+
+            log_debug ("remoted, proc %d disconnecting", p->proc_fd);
+
+            // close the connection to the process
+            if (srv_close_proc (p) < 0)
+                handle_error( "srv_close_proc < 0");
+
+            // remove the process from the processes list
+            if (del_proc (ap, p) < 0)
+                handle_error( "del_proc < 0");
+            if (del_proc (proc_to_read, p) < 0)
+                handle_err( "handle_new_msg", "del_proc < 0");
+
+            msg_free (&m);
+
+            // free process
+            free (p);
+
+            i--;
+            continue;
+        }
+
+#if 0
+        struct pubsub_msg m_data;
+        memset (&m_data, 0, sizeof (struct pubsub_msg));
+
+        pubsub_msg_unserialize (&m_data, m.val, m.valsize);
+
+        if (m_data.type == PUBSUB_MSG_TYPE_SUB) {
+            printf ("proc %d subscribing to %s\n"
+                    , proc_to_read->tab_proc[i]->proc_fd
+                    , m_data.chan);
+            pubsubd_channels_subscribe (chans
+                    , m_data.chan, proc_to_read->tab_proc[i]);
+        }
+
+        if (m_data.type == PUBSUB_MSG_TYPE_UNSUB) {
+            printf ("proc %d unsubscribing to %s\n"
+                    , proc_to_read->tab_proc[i]->proc_fd
+                    , m_data.chan);
+            pubsubd_channels_unsubscribe (chans
+                    , m_data.chan, proc_to_read->tab_proc[i]);
+        }
+
+        if (m_data.type == PUBSUB_MSG_TYPE_PUB) {
+            printf ("proc %d publishing to %s\n"
+                    , proc_to_read->tab_proc[i]->proc_fd
+                    , m_data.chan);
+            struct channel *chan = pubsubd_channel_search (chans, m_data.chan);
+            if (chan == NULL) {
+                handle_err ("handle_new_msg", "publish on nonexistent channel");
+                msg_free (&m);
+                return ;
+            }
+            pubsubd_send (chan->subs, &m_data);
+        }
+
+        pubsub_msg_free (&m_data);
+#endif
+        msg_free (&m);
+    }
+}
+
+void remoted_main_loop (struct service *srv, struct remoted_ctx *ctx)
+{
+    log_debug ("remoted entering main loop");
+    int i, ret = 0; 
+
+    struct array_proc ap;
+    memset(&ap, 0, sizeof(struct array_proc));
+
+    struct array_proc proc_to_read;
+    memset(&proc_to_read, 0, sizeof(struct array_proc));
+
+    while(1) {
+        /* TODO: authorizations */
+        ret = srv_select (&ap, srv, &proc_to_read);
+
+        if (ret == CONNECTION) {
+            handle_new_connection (srv, &ap);
+        } else if (ret == APPLICATION) {
+            handle_new_msg (&ap, &proc_to_read);
+        } else { // both new connection and new msg from at least one client
+            handle_new_connection (srv, &ap);
+            handle_new_msg (&ap, &proc_to_read);
+        }
+        array_proc_free (&proc_to_read);
+    }
+
+    for (i = 0; i < ap.size; i++) {
+        if (srv_close_proc (ap.tab_proc[i]) < 0) {
+            handle_error( "srv_close_proc < 0");
+        }
+    }
+}
+
+void remoted_free_ctx (struct remoted_ctx *ctx)
+{
+    if (ctx->unix_socket_dir != NULL)
+        free (ctx->unix_socket_dir), ctx->unix_socket_dir = NULL;
 }

remote/lib/remoted.h

@@ -3,13 +3,16 @@
 
 #include "../../core/process.h"
 #include "../../core/msg.h"
+#include "msg.h"
 
 #define REMOTED_SERVICE_NAME "remoted"
 
 struct remoted_ctx {
-    /* TODO */
+    char * unix_socket_dir;
+    /* TODO: authorizations */
 };
 
-void remoted_main_loop (struct service *srv);
+void remoted_main_loop (struct service *srv, struct remoted_ctx *ctx);
+void remoted_free_ctx (struct remoted_ctx *ctx);
 
 #endif