X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?p=sim%2Fe2-interface.git;a=blobdiff_plain;f=e2sim%2Fe2apv1sim%2Fe2sim%2Fsrc%2FSCTP%2Fe2sim_sctp.c;fp=e2sim%2Fe2apv1sim%2Fe2sim%2Fsrc%2FSCTP%2Fe2sim_sctp.c;h=b4880f9283a42358dbb9ade60080188206d2dfc1;hp=0000000000000000000000000000000000000000;hb=3ebf932d23dcbec9ed19f4a51f9d00a0a54f5124;hpb=6896318f2b4ff01b4a88b16019c3dc93b0b693f5

diff --git a/e2sim/e2apv1sim/e2sim/src/SCTP/e2sim_sctp.c b/e2sim/e2apv1sim/e2sim/src/SCTP/e2sim_sctp.c
new file mode 100644
index 0000000..b4880f9
--- /dev/null
+++ b/e2sim/e2apv1sim/e2sim/src/SCTP/e2sim_sctp.c
@@ -0,0 +1,173 @@
+/*
+ *
+ * Copyright 2019 AT&T Intellectual Property
+ * Copyright 2019 Nokia
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>		//for close()
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/sctp.h>
+#include <arpa/inet.h>	//for inet_ntop()
+#include <assert.h>
+
+#include "e2sim_sctp.h"
+
+const int CLIENT_SEND_COUNT         = 1;
+const int SERVER_LISTEN_QUEUE_SIZE  = 10;
+
+int sctp_start_server(const char *server_ip_str, const int server_port)
+{
+  if(server_port < 1 || server_port > 65535) {
+      fprintf(stderr, "Invalid port number (%d). Valid values are between 1 and 65535.\n", server_port);
+      return -1;
+  }
+
+  int server_fd;
+  if((server_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_SCTP)) == -1) {
+    perror("socket");
+    return -1;
+  }
+
+  struct sockaddr_in server_addr;
+  memset(&server_addr, 0, sizeof(struct sockaddr_in));
+  server_addr.sin_family      = AF_INET;
+  server_addr.sin_port        = htons(server_port);
+  server_addr.sin_addr.s_addr = inet_addr(server_ip_str);
+
+  if(bind(server_fd, (struct sockaddr*)&server_addr, sizeof(server_addr)) == -1) {
+    perror("bind");
+    return -1;
+  }
+
+  if(listen(server_fd, SERVER_LISTEN_QUEUE_SIZE) != 0) {
+    perror("listen");
+    return -1;
+  }
+
+  assert(server_fd != 0);
+
+  fprintf(stderr, "SCTP server started on %s:%d\n", server_ip_str, server_port);
+
+  return server_fd;
+}
+
+int sctp_start_client(const char *server_ip_str, const int server_port)
+{
+  int client_fd;
+
+  if((client_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_SCTP)) == -1)
+  {
+     perror("socket");
+     return -1;
+  }
+
+  struct sockaddr_in peer_addr;
+  memset(&peer_addr, 0, sizeof(struct sockaddr_in));
+  peer_addr.sin_family      = AF_INET;
+  peer_addr.sin_port        = htons(server_port);
+  peer_addr.sin_addr.s_addr = inet_addr(server_ip_str);
+  // if(inet_pton(AF_INET, server_ip, &(peer_addr.sin_addr)) != 1) {
+  //     printf("Error converting IP address (%s) to sockaddr_in structure\n", server_ip);
+  //     return 0;
+  // }
+
+  fprintf(stderr, "Connecting to server at %s:%d ...", server_ip_str, server_port);
+  if(connect(client_fd, (struct sockaddr*)&peer_addr, sizeof(peer_addr)) == -1) {
+    perror("connect");
+    return -1;
+  }
+
+  assert(client_fd != 0);
+
+  fprintf(stderr, "OK\n");
+
+  return client_fd;
+
+}
+
+//ssize_t sctp_send_to_socket(int sockfd, const void* buf, size_t len)
+int sctp_send_to_socket(int sockfd, const void* buf, size_t len)
+{
+  int sent_len = 0;
+
+  sent_len = send(sockfd, buf, len, 0);
+
+  if(sent_len == -1)
+  {
+    perror("sctp_send_to_socket");
+    return -1;
+  }
+
+  return sent_len;
+}
+
+// int sctp_recv_from_socket(int sockfd, void *buf, size_t buf_size)
+// {
+//   //int len = 0;
+//
+//   memset(buf, 0, buf_size);
+//
+//   int len = recv(sockfd, &buf, buf_size, 0);
+//   if(len == -1)
+//   {
+//     perror("sctp_recv_from_socket");
+//     return -1;
+//   }
+//
+//   return len;
+// }
+
+
+//test only
+void client_send_multiple_test_msg(int client_fd)
+{
+  char buf[1024];
+  int SEND_COUNT = 4;
+
+  for(int i = 0; i < SEND_COUNT; i++)
+  {
+    fprintf(stderr, "Sending message %d of %d \n", i+1, SEND_COUNT);
+
+    memset(buf, 0, sizeof(buf));
+    snprintf(buf, sizeof(buf)-1, "DATA %d", i+1);
+
+    if(send(client_fd, &buf, strlen(buf), 0) == -1) {
+      perror("send");
+      return;
+    }
+
+    memset(buf, 0, sizeof(buf));
+
+    if(recv(client_fd, &buf, sizeof(buf), 0) == -1) {
+      perror("recv");
+      return;
+    }
+
+    fprintf(stderr, "Server reply: %s\n", buf);
+
+    sleep(1);
+  }
+
+  fprintf(stderr, "Closing...\n");
+  if(close(client_fd) == -1) {
+      perror("close");
+      return;
+  }
+}