110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
#include <unistd.h>
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#include <cyassl/ssl.h>
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#include <cyassl/options.h>
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#include <netdb.h>
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#include <signal.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define MAXLINE 4096
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#define SERV_PORT 11111
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/* Send and receive function */
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void DatagramClient (CYASSL* ssl)
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{
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int n = 0;
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char sendLine[MAXLINE], recvLine[MAXLINE - 1];
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while (fgets(sendLine, MAXLINE, stdin) != NULL) {
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if ( ( CyaSSL_write(ssl, sendLine, strlen(sendLine))) !=
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strlen(sendLine)) {
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printf("SSL_write failed");
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}
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n = CyaSSL_read(ssl, recvLine, sizeof(recvLine)-1);
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if (n < 0) {
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int readErr = CyaSSL_get_error(ssl, 0);
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if(readErr != SSL_ERROR_WANT_READ) {
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printf("CyaSSL_read failed");
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}
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}
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recvLine[n] = '\0';
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fputs(recvLine, stdout);
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}
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}
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int main (int argc, char** argv)
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{
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int sockfd = 0;
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struct sockaddr_in servAddr;
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CYASSL* ssl = 0;
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CYASSL_CTX* ctx = 0;
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char cert_array[] = "../cyassl/certs/ca-cert.pem";
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char* certs = cert_array;
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if (argc != 2) {
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printf("usage: udpcli <IP address>\n");
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return 1;
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}
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CyaSSL_Init();
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/* CyaSSL_Debugging_ON(); */
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if ( (ctx = CyaSSL_CTX_new(CyaDTLSv1_2_client_method())) == NULL) {
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fprintf(stderr, "CyaSSL_CTX_new error.\n");
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return 1;
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}
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if (CyaSSL_CTX_load_verify_locations(ctx, certs, 0)
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!= SSL_SUCCESS) {
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fprintf(stderr, "Error loading %s, please check the file.\n", certs);
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return 1;
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}
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ssl = CyaSSL_new(ctx);
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if (ssl == NULL) {
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printf("unable to get ssl object");
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return 1;
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}
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memset(&servAddr, 0, sizeof(servAddr));
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servAddr.sin_family = AF_INET;
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servAddr.sin_port = htons(SERV_PORT);
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if (inet_pton(AF_INET, argv[1], &servAddr.sin_addr) < 1) {
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printf("Error and/or invalid IP address");
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return 1;
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}
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CyaSSL_dtls_set_peer(ssl, &servAddr, sizeof(servAddr));
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if ( (sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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printf("cannot create a socket.");
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return 1;
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}
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CyaSSL_set_fd(ssl, sockfd);
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if (CyaSSL_connect(ssl) != SSL_SUCCESS) {
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int err1 = CyaSSL_get_error(ssl, 0);
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printf("err = %d, %s\n", err1, CyaSSL_ERR_reason_error_string(err1));
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printf("SSL_connect failed");
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return 1;
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}
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DatagramClient(ssl);
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CyaSSL_shutdown(ssl);
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CyaSSL_free(ssl);
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close(sockfd);
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CyaSSL_CTX_free(ctx);
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CyaSSL_Cleanup();
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return 0;
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}
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