From 6d3cd3c58e6521c37070ae8c539aa0ec98e19ca5 Mon Sep 17 00:00:00 2001
From: Alexander Vdolainen <vdo@askele.com>
Date: Fri, 5 Dec 2014 18:04:13 +0200
Subject: [PATCH] added daemon example;

---
 examples/sntld.c | 183 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 182 insertions(+), 1 deletion(-)

diff --git a/examples/sntld.c b/examples/sntld.c
index ddf5a3a..998981e 100644
--- a/examples/sntld.c
+++ b/examples/sntld.c
@@ -1,6 +1,187 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <errno.h>
+
+#include <tdata/usrtc.h>
+#include <sexpr/sexp.h>
+#include <sntl/connection.h>
+
+/* helper functions */
+int __openlistener(int port)
+{
+  int sd;
+  struct sockaddr_in addr;
+
+  sd = socket(PF_INET, SOCK_STREAM, 0);
+  bzero(&addr, sizeof(addr));
+  addr.sin_family = AF_INET;
+  addr.sin_port = htons(port);
+  addr.sin_addr.s_addr = INADDR_ANY;
+  if ( bind(sd, (struct sockaddr*)&addr, sizeof(addr)) != 0 ) {
+    perror("can't bind port");
+    abort();
+  }
+  if ( listen(sd, 10) != 0 ) {
+    perror("Can't configure listening port");
+    abort();
+  }
+
+  return sd;
+}
+
+/*
+ * Validation of the SSL certificate
+ * this function must be exist.
+ */
+static int __validate_sslpem(conn_t *co)
+{
+  return 0;
+}
+
+/*
+ * validate - authorize user with password
+ */
+static int __secure_check(conn_t *co)
+{
+  return 0;
+}
+
+/*
+ * typed list callback
+ */
+static int __set_typed_list_callback(conn_t *co, int ch, char *desc)
+{
+  printf("allowed channel %d (%s)\n", ch, desc);
+  return 0;
+}
+
+/* list of rpc calls functions */
+usrtc_t *fulist;
+
+/* our fake */
+usrtc_t *__rettlist(conn_t *c)
+{
+  return fulist;
+}
+
+/* RPC functions implementation */
+static int __ar_add(void *data, sexp_t *sx)
+{
+  return 0;
+}
+
+static int __ar_multiply(void *data, sexp_t *sx)
+{
+  return 0;
+}
+
+/* define a little bit */
+#define DEFAULT_PORT  13133
 
 int main(int argc, char **argv)
 {
-return 0;
+  char *rootca = NULL, *cert = NULL;
+  int port = DEFAULT_PORT;
+  int opt;
+
+  while((opt = getopt(argc, argv, "p:r:u:")) != -1) {
+    switch(opt) {
+    case 'p':
+      port = atoi(optarg);
+      break;
+    case 'r':
+      rootca = strdup(optarg);
+      break;
+    case 'u':
+      cert = strdup(optarg);
+      break;
+    default:
+      fprintf(stderr, "usage: %s [-p <PORTNUM>] -r <PATH to Root CA> -u <PATH"
+              " to SSL certificate>\n", argv[0]);
+      return EINVAL;
+    }
+  }
+
+  if(!rootca) {
+    fprintf(stderr, "Root CA not pointed.\n Failure.\n");
+    return EINVAL;
+  }
+
+  if(!cert) {
+    fprintf(stderr, "User certificate not pointed.\n Failure.\n");
+    return EINVAL;
+  }
+
+  /* all is fine let's init connection subsystem */
+  opt = connections_subsystem_init();
+  if(opt) {
+    fprintf(stderr, "Subsystem init failed: %d\n", opt);
+    return opt;
+  }
+  /* set wroking certificates */
+  opt = connections_subsystem_setsslserts(rootca, cert, cert);
+  if(opt) {
+    fprintf(stderr, "Subsystem init failed (set SSL x.509 pems): %d\n", opt);
+    return opt;
+  }
+
+  /* clean up */
+  free(rootca);
+  free(cert);
+
+  /* set important callbacks to do the security checking */
+  connections_subsystem_set_securecheck(conn_sys, __secure_check);
+  connections_subsystem_set_sslvalidator(conn_sys, __validate_sslpem);
+  /* set a callback, it's optional and doesn't required in server side apps */
+  connections_subsystem_set_rpctlist_call(conn_sys, __set_typed_list_callback);
+
+  /* ok, now we need to construct RPC lists (channels) */
+  if(!(fulist = malloc(sizeof(usrtc_t)))) {
+    fprintf(stderr, "Cannot allocate memory for RPC lists\n Failure.\n");
+    return ENOMEM;
+  }
+  opt = sntl_rpclist_init(fulist);
+  if(opt) {
+    fprintf(stderr, "Failed to init rpc list\n Failure.\n");
+    return opt;
+  }
+  /* we will add one channel with type id 12 "Demo rpc list" */
+  opt = sntl_rpclist_add(fulist, 12, "Demo RPC list", NULL);
+  if(opt) {
+    fprintf(stderr, "Failed to add typed RPC channel\n Failure.\n");
+    return opt;
+  }
+  /* ok, let's add two functions */
+  opt = sntl_rpclist_add_function(fulist, 12, "ar-add", __ar_add);
+  if(opt) {
+  __fail:
+    fprintf(stderr, "Failed to add functions to typed RPC channel\n Failure.\n");
+    return opt;
+  }
+  opt = sntl_rpclist_add_function(fulist, 12, "ar-multiply", __ar_multiply);
+  if(opt) goto __fail;
+  /* ok, setup it */
+  connections_subsystem_setrpclist_function(__rettlist);
+
+  /* now we're ready to run the listen process */
+  int srv = __openlistener(port);
+  while(1) {
+    struct sockaddr_in addr;
+    socklen_t len = sizeof(addr);
+    conn_t *co = malloc(sizeof(conn_t));
+
+    int client = accept(srv, (struct sockaddr*)&addr, &len); /* accept connection as usual */
+    opt = connection_create(co, client); /* create connection, that's all */
+    if(opt) return opt;
+  }
+
+  return 0;
 }