Initial implementation of core/daemon.

core/Makefile

@@ -2,7 +2,7 @@ CC = gcc
 CFLAGS = -O0 -I../include -I../../c-libp2p/include -I../../c-protobuf -Wall
 LFLAGS = 
 DEPS = builder.h ipfs_node.h
-OBJS = builder.o
+OBJS = builder.o daemon.o null.o
 
 %.o: %.c $(DEPS)
 	$(CC) -c -o $@ $< $(CFLAGS)

core/daemon.c

@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <pthread.h>
+#include "libp2p/net/p2pnet.h"
+#include "ipfs/core/daemon.h"
+
+int ipfs_daemon (int argc, char **argv)
+{
+    int count_pths = 0;
+    pthread_t work_pths[MAX];
+    struct null_listen_params listen_param;
+
+    fprintf(stderr, "Initializing daemon...\n");
+
+    // Set null router param
+    listen_param.ipv4 = 0; // ip 0.0.0.0, all interfaces
+    listen_param.port = 4001;
+
+    // Create pthread for ipfs_null_listen.
+    if (pthread_create(&work_pths[count_pths++], NULL, ipfs_null_listen, &listen_param)) {
+        fprintf(stderr, "Error creating thread for ipfs_null_listen\n");
+        return 1;
+    }
+
+    fprintf(stderr, "Daemon is ready\n");
+
+    // Wait for pthreads to finish.
+    while (count_pths) {
+        if (pthread_join(work_pths[--count_pths], NULL)) {
+            fprintf(stderr, "Error joining thread\n");
+            return 2;
+        }
+    }
+
+    // All pthreads aborted?
+    return 0;
+}

core/null.c

@@ -0,0 +1,63 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <pthread.h>
+#include "libp2p/net/p2pnet.h"
+#include "ipfs/core/daemon.h"
+
+void *ipfs_null_connection (void *ptr)
+{
+    struct null_connection_params *connection_param;
+
+    connection_param = (struct null_connection_params*) ptr;
+
+    // TODO: multistream + secio + message.
+    fprintf(stderr, "Connection %d, count %d\n", connection_param->socket, *(connection_param->count));
+
+    close (connection_param->socket); // close socket.
+    (*(connection_param->count))--; // update counter.
+    free (connection_param);
+    return (void*) 1;
+}
+
+void *ipfs_null_listen (void *ptr)
+{
+    int socketfd, s, count = 0;
+    pthread_t pth_connection;
+    struct null_listen_params *listen_param;
+    struct null_connection_params *connection_param;
+
+    listen_param = (struct null_listen_params*) ptr;
+
+    if ((socketfd = socket_listen(socket_tcp4(), &(listen_param->ipv4), &(listen_param->port))) <= 0) {
+        perror("fail to init null router.");
+        exit (1);
+    }
+
+    fprintf(stderr, "Null listening on %d\n", listen_param->port);
+
+    for (;;) {
+        s = socket_accept4(socketfd, &(listen_param->ipv4), &(listen_param->port));
+        if (count >= CONNECTIONS) { // limit reached.
+            close (s);
+            continue;
+        }
+
+        count++;
+        connection_param = malloc (sizeof (struct null_connection_params));
+        if (connection_param) {
+            connection_param->socket = s;
+            connection_param->count = &count;
+            // Create pthread for ipfs_null_connection.
+            if (pthread_create(&pth_connection, NULL, ipfs_null_connection, connection_param)) {
+                fprintf(stderr, "Error creating thread for connection %d\n", count);
+                close (s);
+            } else {
+                pthread_detach (pth_connection);
+            }
+        }
+    }
+
+    return (void*) 2;
+}

include/ipfs/core/daemon.h

@@ -0,0 +1,21 @@
+#ifndef DAEMON_H
+    #define DAEMON_H
+    #include <stdint.h>
+
+    #define MAX 5
+    #define CONNECTIONS 50
+
+    struct null_connection_params {
+        int socket;
+        int *count;
+    };
+
+    struct null_listen_params {
+        uint32_t ipv4;
+        uint16_t port;
+    };
+
+    void *ipfs_null_connection (void *ptr);
+    void *ipfs_null_listen (void *ptr);
+    int ipfs_daemon (int argc, char **argv);
+#endif // DAEMON_H

main/Makefile

@@ -7,7 +7,7 @@ OBJS = main.o \
 	../cid/cid.o \
 	../cmd/ipfs/init.o \
 	../commands/argument.o ../commands/command_option.o ../commands/command.o ../commands/cli/parse.o \
-	../core/builder.o \
+	../core/builder.o ../core/daemon.o ../core/null.o \
 	../datastore/ds_helper.o \
 	../datastore/key.o \
 	../dnslink/dnslink.o \

main/main.c

@@ -54,6 +54,7 @@ void strip_quotes(int argc, char** argv) {
 #define OBJECT_GET 3
 #define DNS 4
 #define CAT 5
+#define DAEMON 6
 
 /***
  * Basic parsing of command line arguments to figure out where the user wants to go
@@ -78,6 +79,9 @@ int parse_arguments(int argc, char** argv) {
 	if (strcmp("dns", argv[1]) == 0) {
 		return DNS;
 	}
+	if (strcmp("daemon", argv[1]) == 0) {
+		return DAEMON;
+	}
 	return -1;
 }
 
@@ -103,5 +107,8 @@ int main(int argc, char** argv) {
 	case (DNS):
 		ipfs_dns(argc, argv);
 		break;
+	case (DAEMON):
+		ipfs_daemon(argc, argv);
+		break;
 	}
 }