3 files changed, 121 insertions, 0 deletions
diff --git a/socket/Makefile b/socket/Makefile
new file mode 100644
index 000000000..a9443f1c4
--- /dev/null
+++ b/socket/Makefile
@@ -0,0 +1,7 @@
+all: server client
+
+server: server.c
+	gcc -Wall -o server server.c
+
+client: client.c
+	gcc -Wall -o client client.c
diff --git a/socket/client.c b/socket/client.c
new file mode 100644
index 000000000..a132a7a9e
--- /dev/null
+++ b/socket/client.c
@@ -0,0 +1,43 @@
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+
+#define SOCKET_PATH "/tmp/nix-daemon"
+
+
+int main(int argc, char * * argv)
+{
+    int res;
+    
+    int sock = socket(PF_UNIX, SOCK_STREAM, 0);
+    assert(sock != -1);
+
+    struct sockaddr_un addr;
+    addr.sun_family = AF_UNIX;
+    strcpy(addr.sun_path, SOCKET_PATH);
+    
+    res = connect(sock, (struct sockaddr *) &addr, sizeof(addr));
+    assert(res != -1);
+
+    int i;
+    for (i = 0; i < 100000; i++) {
+        int len = send(sock, &i, sizeof(i), 0);
+        assert(len == sizeof(i));
+
+        int j;
+        len = recv(sock, &j, sizeof(j), 0);
+        if (len < sizeof(j)) break;
+        assert(i * 2 == j);
+    }
+
+    close(sock);
+
+    return 0;
+}
diff --git a/socket/server.c b/socket/server.c
new file mode 100644
index 000000000..4e457ac21
--- /dev/null
+++ b/socket/server.c
@@ -0,0 +1,71 @@
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+
+#define SOCKET_PATH "/tmp/nix-daemon"
+
+
+int main(int argc, char * * argv)
+{
+    int res;
+    
+    int sock = socket(PF_UNIX, SOCK_STREAM, 0);
+    assert(sock != -1);
+
+    unlink(SOCKET_PATH);
+    
+    struct sockaddr_un addr;
+    addr.sun_family = AF_UNIX;
+    strcpy(addr.sun_path, SOCKET_PATH);
+    
+    res = bind(sock, (struct sockaddr *) &addr, sizeof(addr));
+    assert(res != -1);
+
+    res = listen(sock, 5);
+    if (res == -1)
+        fprintf(stderr, "%s\n", strerror(errno));
+    assert(res != -1);
+
+    while (1) {
+
+        struct sockaddr_un remoteAddr;
+        socklen_t remoteAddrLen = sizeof(remoteAddr);
+        
+        int remote = accept(sock,
+            (struct sockaddr *) &remoteAddr, &remoteAddrLen);
+        if (remote == -1)
+            fprintf(stderr, "%s\n", strerror(errno));
+        assert(remote != -1);
+
+        fprintf(stderr, "connection %d\n", remote);
+
+        while (1) {
+            int i;
+            ssize_t len;
+
+            len = recv(remote, &i, sizeof(i), 0);
+            if (len < sizeof(i)) break;
+
+            //            printf("%d\n", i);
+
+            int j = i * 2;
+            len = send(remote, &j, sizeof(j), 0);
+            if (len == -1)
+                fprintf(stderr, "%s\n", strerror(errno));
+            assert(len == sizeof(j));
+        }
+        
+        close(remote);
+    }
+    
+    close(sock);
+
+    return 0;
+}