1 /*****************************************************************************
3 # Copyright 2019 AT&T Intellectual Property *
4 # Copyright 2019 Nokia *
6 # Licensed under the Apache License, Version 2.0 (the "License"); *
7 # you may not use this file except in compliance with the License. *
8 # You may obtain a copy of the License at *
10 # http://www.apache.org/licenses/LICENSE-2.0 *
12 # Unless required by applicable law or agreed to in writing, software *
13 # distributed under the License is distributed on an "AS IS" BASIS, *
14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
15 # See the License for the specific language governing permissions and *
16 # limitations under the License. *
18 ******************************************************************************/
21 #include <unistd.h> //for close()
23 #include <sys/socket.h>
24 #include <netinet/in.h>
25 #include <netinet/sctp.h>
26 #include <arpa/inet.h> //for inet_ntop()
29 #include "e2sim_sctp.hpp"
30 // #include "e2sim_defs.h"
32 int sctp_start_server(const char *server_ip_str, const int server_port)
34 if(server_port < 1 || server_port > 65535) {
35 LOG_E("Invalid port number (%d). Valid values are between 1 and 65535.\n", server_port);
40 struct sockaddr* server_addr;
43 struct sockaddr_in server4_addr;
44 memset(&server4_addr, 0, sizeof(struct sockaddr_in));
46 struct sockaddr_in6 server6_addr;
47 memset(&server6_addr, 0, sizeof(struct sockaddr_in6));
49 if(inet_pton(AF_INET, server_ip_str, &server4_addr.sin_addr) == 1)
51 server4_addr.sin_family = AF_INET;
52 server4_addr.sin_port = htons(server_port);
54 server_addr = (struct sockaddr*)&server4_addr;
56 addr_len = sizeof(server4_addr);
58 else if(inet_pton(AF_INET6, server_ip_str, &server6_addr.sin6_addr) == 1)
60 server6_addr.sin6_family = AF_INET6;
61 server6_addr.sin6_port = htons(server_port);
63 server_addr = (struct sockaddr*)&server6_addr;
65 addr_len = sizeof(server6_addr);
68 perror("inet_pton()");
72 if((server_fd = socket(af, SOCK_STREAM, IPPROTO_SCTP)) == -1) {
77 if(bind(server_fd, server_addr, addr_len) == -1) {
82 if(listen(server_fd, SERVER_LISTEN_QUEUE_SIZE) != 0) {
87 assert(server_fd != 0);
89 LOG_I("[SCTP] Server started on %s:%d", server_ip_str, server_port);
94 int sctp_start_client(const char *server_ip_str, const int server_port)
98 struct sockaddr* server_addr;
101 struct sockaddr_in server4_addr;
102 memset(&server4_addr, 0, sizeof(struct sockaddr_in));
104 struct sockaddr_in6 server6_addr;
105 memset(&server6_addr, 0, sizeof(struct sockaddr_in6));
107 if(inet_pton(AF_INET, server_ip_str, &server4_addr.sin_addr) == 1)
109 server4_addr.sin_family = AF_INET;
110 server4_addr.sin_port = htons(server_port);
112 server_addr = (struct sockaddr*)&server4_addr;
114 addr_len = sizeof(server4_addr);
116 else if(inet_pton(AF_INET6, server_ip_str, &server6_addr.sin6_addr) == 1)
118 server6_addr.sin6_family = AF_INET6;
119 server6_addr.sin6_port = htons(server_port);
121 server_addr = (struct sockaddr*)&server6_addr;
123 addr_len = sizeof(server6_addr);
126 perror("inet_pton()");
130 if((client_fd = socket(af, SOCK_STREAM, IPPROTO_SCTP)) == -1)
136 LOG_I("[SCTP] Connecting to server at %s:%d ...", server_ip_str, server_port);
138 if(connect(client_fd, server_addr, addr_len) == -1) {
143 assert(client_fd != 0);
145 LOG_I("[SCTP] Connection established");
151 int sctp_accept_connection(const char *server_ip_str, const int server_fd)
153 LOG_I("[SCTP] Waiting for new connection...");
155 struct sockaddr client_addr;
156 socklen_t client_addr_size;
160 client_fd = accept(server_fd, &client_addr, &client_addr_size);
167 //Retrieve client IP_ADDR
168 char client_ip6_addr[INET6_ADDRSTRLEN], client_ip4_addr[INET_ADDRSTRLEN];
169 if(strchr(server_ip_str, ':') != NULL) //IPv6
171 struct sockaddr_in6* client_ipv6 = (struct sockaddr_in6*)&client_addr;
172 inet_ntop(AF_INET6, &(client_ipv6->sin6_addr), client_ip6_addr, INET6_ADDRSTRLEN);
173 LOG_I("[SCTP] New client connected from %s", client_ip6_addr);
176 struct sockaddr_in* client_ipv4 = (struct sockaddr_in*)&client_addr;
177 inet_ntop(AF_INET, &(client_ipv4->sin_addr), client_ip4_addr, INET_ADDRSTRLEN);
178 LOG_I("[SCTP] New client connected from %s", client_ip4_addr);
184 int sctp_send_data(int &socket_fd, sctp_buffer_t &data)
186 int sent_len = send(socket_fd, (void*)(&(data.buffer[0])), data.len, 0);
189 perror("[SCTP] sctp_send_data");
197 Receive data from SCTP socket
200 0: close the connection
203 int sctp_receive_data(int &socket_fd, sctp_buffer_t &data)
205 //clear out the data before receiving
206 memset(data.buffer, 0, sizeof(data.buffer));
209 //receive data from the socket
210 int recv_len = recv(socket_fd, &(data.buffer), sizeof(data.buffer), 0);
213 perror("[SCTP] recv");
216 else if (recv_len == 0)
218 LOG_I("[SCTP] Connection closed by remote peer");
219 if(close(socket_fd) == -1)
221 perror("[SCTP] close");