int main(int argc, char **argv)
{
struct s2n_connection *conn;
uint8_t mac_key[] = "sample mac key";
uint8_t des3_key[] = "12345678901234567890123";
struct s2n_blob des3 = {.data = des3_key,.size = sizeof(des3_key) };
uint8_t random_data[S2N_DEFAULT_FRAGMENT_LENGTH + 1];
struct s2n_blob r = {.data = random_data, .size = sizeof(random_data)};
BEGIN_TEST();
EXPECT_SUCCESS(s2n_init());
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
EXPECT_SUCCESS(s2n_get_urandom_data(&r));
/* Peer and we are in sync */
conn->server = &conn->active;
conn->client = &conn->active;
/* test the 3des cipher with a SHA1 hash */
conn->active.cipher_suite->cipher = &s2n_3des;
conn->active.cipher_suite->hmac_alg = S2N_HMAC_SHA1;
EXPECT_SUCCESS(conn->active.cipher_suite->cipher->get_encryption_key(&conn->active.server_key, &des3));
EXPECT_SUCCESS(conn->active.cipher_suite->cipher->get_decryption_key(&conn->active.client_key, &des3));
EXPECT_SUCCESS(s2n_hmac_init(&conn->active.client_record_mac, S2N_HMAC_SHA1, mac_key, sizeof(mac_key)));
EXPECT_SUCCESS(s2n_hmac_init(&conn->active.server_record_mac, S2N_HMAC_SHA1, mac_key, sizeof(mac_key)));
conn->actual_protocol_version = S2N_TLS11;
int max_aligned_fragment = S2N_DEFAULT_FRAGMENT_LENGTH - (S2N_DEFAULT_FRAGMENT_LENGTH % 8);
for (int i = 0; i <= max_aligned_fragment + 1; i++) {
struct s2n_blob in = {.data = random_data,.size = i };
int bytes_written;
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->out));
EXPECT_SUCCESS(bytes_written = s2n_record_write(conn, TLS_APPLICATION_DATA, &in));
if (i < max_aligned_fragment - 20 - 8 - 1) {
EXPECT_EQUAL(bytes_written, i);
} else {
EXPECT_EQUAL(bytes_written, max_aligned_fragment - 20 - 8 - 1);
}
uint16_t predicted_length = bytes_written + 1 + 20 + 8;
if (predicted_length % 8) {
predicted_length += (8 - (predicted_length % 8));
}
EXPECT_EQUAL(conn->out.blob.data[0], TLS_APPLICATION_DATA);
EXPECT_EQUAL(conn->out.blob.data[1], 3);
EXPECT_EQUAL(conn->out.blob.data[2], 2);
EXPECT_EQUAL(conn->out.blob.data[3], (predicted_length >> 8) & 0xff);
EXPECT_EQUAL(conn->out.blob.data[4], predicted_length & 0xff);
/* The data should be encrypted */
if (bytes_written > 10) {
EXPECT_NOT_EQUAL(memcmp(conn->out.blob.data + 5, random_data, bytes_written), 0);
}
/* Copy the encrypted out data to the in data */
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->in));
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->header_in));
EXPECT_SUCCESS(s2n_stuffer_copy(&conn->out, &conn->header_in, 5))
EXPECT_SUCCESS(s2n_stuffer_copy(&conn->out, &conn->in, s2n_stuffer_data_available(&conn->out)))
/* Let's decrypt it */
uint8_t content_type;
uint16_t fragment_length;
EXPECT_SUCCESS(s2n_record_header_parse(conn, &content_type, &fragment_length));
EXPECT_SUCCESS(s2n_record_parse(conn));
EXPECT_EQUAL(content_type, TLS_APPLICATION_DATA);
EXPECT_EQUAL(fragment_length, predicted_length);
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->header_in));
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->in));
}
EXPECT_SUCCESS(conn->active.cipher_suite->cipher->destroy_key(&conn->active.server_key));
EXPECT_SUCCESS(conn->active.cipher_suite->cipher->destroy_key(&conn->active.client_key));
EXPECT_SUCCESS(s2n_connection_free(conn));
END_TEST();
}
int main(int argc, char *const *argv)
{
struct addrinfo hints, *ai_list, *ai;
int r, sockfd = 0;
ssize_t session_state_length = 0;
uint8_t *session_state = NULL;
/* Optional args */
const char *alpn_protocols = NULL;
const char *server_name = NULL;
const char *ca_file = NULL;
const char *ca_dir = NULL;
uint16_t mfl_value = 0;
uint8_t insecure = 0;
int reconnect = 0;
uint8_t session_ticket = 1;
s2n_status_request_type type = S2N_STATUS_REQUEST_NONE;
uint32_t dyn_rec_threshold = 0;
uint8_t dyn_rec_timeout = 0;
/* required args */
const char *cipher_prefs = "default";
const char *host = NULL;
struct verify_data unsafe_verify_data;
const char *port = "443";
int echo_input = 0;
int use_corked_io = 0;
static struct option long_options[] = {
{"alpn", required_argument, 0, 'a'},
{"ciphers", required_argument, 0, 'c'},
{"echo", required_argument, 0, 'e'},
{"help", no_argument, 0, 'h'},
{"name", required_argument, 0, 'n'},
{"status", no_argument, 0, 's'},
{"mfl", required_argument, 0, 'm'},
{"ca-file", required_argument, 0, 'f'},
{"ca-dir", required_argument, 0, 'd'},
{"insecure", no_argument, 0, 'i'},
{"reconnect", no_argument, 0, 'r'},
{"no-session-ticket", no_argument, 0, 'T'},
{"dynamic", required_argument, 0, 'D'},
{"timeout", required_argument, 0, 't'},
{"corked-io", no_argument, 0, 'C'},
};
while (1) {
int option_index = 0;
int c = getopt_long(argc, argv, "a:c:ehn:sf:d:D:t:irTC", long_options, &option_index);
if (c == -1) {
break;
}
switch (c) {
case 'a':
alpn_protocols = optarg;
break;
case 'C':
use_corked_io = 1;
break;
case 'c':
cipher_prefs = optarg;
break;
case 'e':
echo_input = 1;
break;
case 'h':
usage();
break;
case 'n':
server_name = optarg;
break;
case 's':
type = S2N_STATUS_REQUEST_OCSP;
break;
case 'm':
mfl_value = (uint16_t) atoi(optarg);
break;
case 'f':
ca_file = optarg;
break;
case 'd':
ca_dir = optarg;
break;
case 'i':
insecure = 1;
break;
case 'r':
reconnect = 5;
break;
case 'T':
session_ticket = 0;
break;
case 't':
dyn_rec_timeout = (uint8_t) MIN(255, atoi(optarg));
break;
case 'D':
dyn_rec_threshold = strtoul(optarg, 0, 10);
if (errno == ERANGE) {
dyn_rec_threshold = 0;
}
break;
case '?':
default:
usage();
break;
}
}
if (optind < argc) {
host = argv[optind++];
}
if (optind < argc) {
port = argv[optind++];
}
if (!host) {
usage();
}
if (!server_name) {
server_name = host;
}
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) {
fprintf(stderr, "Error disabling SIGPIPE\n");
exit(1);
}
GUARD_EXIT(s2n_init(), "Error running s2n_init()");
if ((r = getaddrinfo(host, port, &hints, &ai_list)) != 0) {
fprintf(stderr, "error: %s\n", gai_strerror(r));
exit(1);
}
do {
int connected = 0;
for (ai = ai_list; ai != NULL; ai = ai->ai_next) {
if ((sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol)) == -1) {
continue;
}
if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) == -1) {
close(sockfd);
continue;
}
connected = 1;
/* connect() succeeded */
break;
}
if (connected == 0) {
fprintf(stderr, "Failed to connect to %s:%s\n", host, port);
exit(1);
}
struct s2n_config *config = s2n_config_new();
setup_s2n_config(config, cipher_prefs, type, &unsafe_verify_data, host, alpn_protocols, mfl_value);
if (ca_file || ca_dir) {
if (s2n_config_set_verification_ca_location(config, ca_file, ca_dir) < 0) {
print_s2n_error("Error setting CA file for trust store.");
}
}
else if (insecure) {
GUARD_EXIT(s2n_config_disable_x509_verification(config), "Error disabling X.509 validation");
}
if (session_ticket) {
GUARD_EXIT(s2n_config_set_session_tickets_onoff(config, 1), "Error enabling session tickets");
}
struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT);
if (conn == NULL) {
print_s2n_error("Error getting new connection");
exit(1);
}
GUARD_EXIT(s2n_connection_set_config(conn, config), "Error setting configuration");
GUARD_EXIT(s2n_set_server_name(conn, server_name), "Error setting server name");
GUARD_EXIT(s2n_connection_set_fd(conn, sockfd) , "Error setting file descriptor");
if (use_corked_io) {
GUARD_EXIT(s2n_connection_use_corked_io(conn), "Error setting corked io");
}
/* Update session state in connection if exists */
if (session_state_length > 0) {
GUARD_EXIT(s2n_connection_set_session(conn, session_state, session_state_length), "Error setting session state in connection");
}
/* See echo.c */
int ret = negotiate(conn);
if (ret != 0) {
/* Error is printed in negotiate */
return -1;
}
printf("Connected to %s:%s\n", host, port);
/* Save session state from connection if reconnect is enabled */
if (reconnect > 0) {
if (!session_ticket && s2n_connection_get_session_id_length(conn) <= 0) {
printf("Endpoint sent empty session id so cannot resume session\n");
exit(1);
}
free(session_state);
session_state_length = s2n_connection_get_session_length(conn);
session_state = calloc(session_state_length, sizeof(uint8_t));
if (s2n_connection_get_session(conn, session_state, session_state_length) != session_state_length) {
print_s2n_error("Error getting serialized session state");
exit(1);
}
}
if (dyn_rec_threshold > 0 && dyn_rec_timeout > 0) {
s2n_connection_set_dynamic_record_threshold(conn, dyn_rec_threshold, dyn_rec_timeout);
}
if (echo_input == 1) {
echo(conn, sockfd);
}
s2n_blocked_status blocked;
s2n_shutdown(conn, &blocked);
GUARD_EXIT(s2n_connection_free(conn), "Error freeing connection");
GUARD_EXIT(s2n_config_free(config), "Error freeing configuration");
close(sockfd);
reconnect--;
} while (reconnect >= 0);
GUARD_EXIT(s2n_cleanup(), "Error running s2n_cleanup()");
free(session_state);
freeaddrinfo(ai_list);
return 0;
}
int main(int argc, char **argv)
{
struct s2n_connection *conn;
struct s2n_config *config;
int status;
pid_t pid;
int server_to_client[2];
int client_to_server[2];
BEGIN_TEST();
EXPECT_SUCCESS(setenv("S2N_ENABLE_CLIENT_MODE", "1", 0));
/* Create a pipe */
EXPECT_SUCCESS(s2n_init());
for (int is_dh_key_exchange = 0; is_dh_key_exchange <= 1; is_dh_key_exchange++) {
EXPECT_SUCCESS(pipe(server_to_client));
EXPECT_SUCCESS(pipe(client_to_server));
/* Create a child process */
pid = fork();
if (pid == 0) {
/* This is the child process, close the read end of the pipe */
EXPECT_SUCCESS(close(client_to_server[0]));
EXPECT_SUCCESS(close(server_to_client[1]));
/* Write the fragmented hello message */
mock_client(client_to_server[1], server_to_client[0]);
}
/* This is the parent */
EXPECT_SUCCESS(close(client_to_server[1]));
EXPECT_SUCCESS(close(server_to_client[0]));
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
EXPECT_NOT_NULL(config = s2n_config_new());
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key(config, certificate, private_key));
if (is_dh_key_exchange) {
EXPECT_SUCCESS(s2n_config_add_dhparams(config, dhparams));
}
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
/* Set up the connection to read from the fd */
EXPECT_SUCCESS(s2n_connection_set_read_fd(conn, client_to_server[0]));
EXPECT_SUCCESS(s2n_connection_set_write_fd(conn, server_to_client[1]));
/* Negotiate the handshake. */
EXPECT_SUCCESS(s2n_negotiate(conn, &status));
char buffer[0xffff];
for (int i = 1; i < 0xffff; i += 100) {
char * ptr = buffer;
int bytes_read = 0;
int size = i;
do {
EXPECT_SUCCESS(bytes_read = s2n_recv(conn, ptr, size, &status));
size -= bytes_read;
ptr += bytes_read;
} while(size);
for (int j = 0; j < i; j++) {
EXPECT_EQUAL(buffer[j], 33);
}
}
/* Verify that read() returns EOF */
EXPECT_SUCCESS(s2n_recv(conn, buffer, 1, &status));
EXPECT_SUCCESS(s2n_shutdown(conn, &status));
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_config_free(config));
/* Clean up */
EXPECT_EQUAL(waitpid(-1, &status, 0), pid);
EXPECT_EQUAL(status, 0);
}
END_TEST();
return 0;
}
int main(int argc, char * const *argv)
{
struct addrinfo hints, *ai_list, *ai;
int r, sockfd = 0;
/* Optional args */
const char *alpn_protocols = NULL;
const char *server_name = NULL;
s2n_status_request_type type = S2N_STATUS_REQUEST_NONE;
/* required args */
const char *host = NULL;
const char *port = "443";
static struct option long_options[] = {
{ "alpn", required_argument, 0, 'a' },
{ "help", no_argument, 0, 'h' },
{ "name", required_argument, 0, 'n' },
{ "status", no_argument, 0, 's' },
};
while (1) {
int option_index = 0;
int c = getopt_long (argc, argv, "a:hn:s", long_options, &option_index);
if (c == -1) {
break;
}
switch (c) {
case 'a':
alpn_protocols = optarg;
break;
case 'h':
usage();
break;
case 'n':
server_name = optarg;
break;
case 's':
type = S2N_STATUS_REQUEST_OCSP;
break;
case '?':
default:
usage();
break;
}
}
if (optind < argc) {
host = argv[optind++];
}
if (optind < argc) {
port = argv[optind++];
}
if (!host) {
usage();
}
if (!server_name) {
server_name = host;
}
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) {
fprintf(stderr, "Error disabling SIGPIPE\n");
exit(1);
}
if ((r = getaddrinfo(host, port, &hints, &ai_list)) != 0) {
fprintf(stderr, "error: %s\n", gai_strerror(r));
exit(1);
}
int connected = 0;
for (ai = ai_list; ai != NULL; ai = ai->ai_next) {
if ((sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol)) == -1) {
continue;
}
if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) == -1) {
close(sockfd);
continue;
}
connected = 1;
/* connect() succeeded */
break;
}
freeaddrinfo(ai_list);
if (connected == 0) {
fprintf(stderr, "Failed to connect to %s:%s\n", argv[1], port);
close(sockfd);
exit(1);
}
if (s2n_init() < 0) {
fprintf(stderr, "Error running s2n_init(): '%s'\n", s2n_strerror(s2n_errno, "EN"));
}
struct s2n_config *config = s2n_config_new();
if (config == NULL) {
fprintf(stderr, "Error getting new config: '%s'\n", s2n_strerror(s2n_errno, "EN"));
exit(1);
}
if (s2n_config_set_status_request_type(config, type) < 0) {
fprintf(stderr, "Error setting status request type: '%s'\n", s2n_strerror(s2n_errno, "EN"));
exit(1);
}
if (alpn_protocols) {
/* Count the number of commas, this tells us how many protocols there
are in the list */
const char *ptr = alpn_protocols;
int protocol_count = 1;
while (*ptr) {
if (*ptr == ',') {
protocol_count++;
}
ptr++;
}
char **protocols = malloc(sizeof(char *) * protocol_count);
if (!protocols) {
fprintf(stderr, "Error allocating memory\n");
exit(1);
}
const char *next = alpn_protocols;
int index = 0;
int length = 0;
ptr = alpn_protocols;
while (*ptr) {
if (*ptr == ',') {
protocols[index] = malloc(length + 1);
if (!protocols[index]) {
fprintf(stderr, "Error allocating memory\n");
exit(1);
}
memcpy(protocols[index], next, length);
protocols[index][length] = '\0';
length = 0;
index++;
ptr++;
next = ptr;
} else {
length++;
ptr++;
}
}
if (ptr != next) {
protocols[index] = malloc(length + 1);
if (!protocols[index]) {
fprintf(stderr, "Error allocating memory\n");
exit(1);
}
memcpy(protocols[index], next, length);
protocols[index][length] = '\0';
}
if (s2n_config_set_protocol_preferences(config, (const char * const *)protocols, protocol_count) < 0) {
fprintf(stderr, "Failed to set protocol preferences: '%s'\n", s2n_strerror(s2n_errno, "EN"));
exit(1);
}
while(protocol_count) {
protocol_count--;
free(protocols[protocol_count]);
}
free(protocols);
}
struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT);
if (conn == NULL) {
fprintf(stderr, "Error getting new connection: '%s'\n", s2n_strerror(s2n_errno, "EN"));
exit(1);
}
printf("Connected to %s:%s\n", host, port);
if (s2n_connection_set_config(conn, config) < 0) {
fprintf(stderr, "Error setting configuration: '%s'\n", s2n_strerror(s2n_errno, "EN"));
exit(1);
}
if (s2n_set_server_name(conn, server_name) < 0) {
fprintf(stderr, "Error setting server name: '%s'\n", s2n_strerror(s2n_errno, "EN"));
exit(1);
}
if (s2n_connection_set_fd(conn, sockfd) < 0) {
fprintf(stderr, "Error setting file descriptor: '%s'\n", s2n_strerror(s2n_errno, "EN"));
exit(1);
}
/* See echo.c */
negotiate(conn);
echo(conn, sockfd);
s2n_blocked_status blocked;
if (s2n_shutdown(conn, &blocked) < 0) {
fprintf(stderr, "Error calling s2n_shutdown: '%s'\n", s2n_strerror(s2n_errno, "EN"));
exit(1);
}
if (s2n_connection_free(conn) < 0) {
fprintf(stderr, "Error freeing connection: '%s'\n", s2n_strerror(s2n_errno, "EN"));
exit(1);
}
if (s2n_config_free(config) < 0) {
fprintf(stderr, "Error freeing configuration: '%s'\n", s2n_strerror(s2n_errno, "EN"));
exit(1);
}
if (s2n_cleanup() < 0) {
fprintf(stderr, "Error running s2n_cleanup(): '%s'\n", s2n_strerror(s2n_errno, "EN"));
}
return 0;
}
int main(int argc, char **argv)
{
if(argc != 2)
{
fprintf(stderr,"usage: %s hostname\n", argv[0]);
return 1;
}
signal(SIGINT, sigint_handler);
printf("Looking up addresses for %s ...\n", argv[1]);
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC; // AF_INET or AF_INET6 to force version
hints.ai_socktype = SOCK_STREAM;
struct addrinfo *dnsres;
int status_1 = getaddrinfo(argv[1], PORT, &hints, &dnsres);
if(status_1 != 0)
{
fprintf(stderr, "dns lookup failed: %s\n", gai_strerror(status_1));
return 2;
}
print_addrinfo(dnsres);
printf("Connecting to %s ...\n", "the server");
int sockfd = socket(dnsres->ai_family, dnsres->ai_socktype, dnsres->ai_protocol);
if(connect(sockfd, dnsres->ai_addr, dnsres->ai_addrlen) != 0)
{
perror("connect");
return 3;
}
printf("Connected.\n");
freeaddrinfo(dnsres); // frees the memory that was dynamically allocated for the linked lists by getaddrinfo
s2n_init();
struct s2n_config *config = s2n_config_new();
s2n_status_request_type type = S2N_STATUS_REQUEST_NONE;
s2n_config_set_status_request_type(config, type);
struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT);
s2n_connection_set_config(conn, config);
s2n_connection_set_fd(conn, sockfd);
s2n_blocked_status blocked;
do {
if (s2n_negotiate(conn, &blocked) < 0) {
fprintf(stderr, "Failed to negotiate: '%s' %d\n", s2n_strerror(s2n_errno, "EN"), s2n_connection_get_alert(conn));
exit(1);
}
} while (blocked);
int client_hello_version;
int client_protocol_version;
int server_protocol_version;
int actual_protocol_version;
if ((client_hello_version = s2n_connection_get_client_hello_version(conn)) < 0) {
fprintf(stderr, "Could not get client hello version\n");
exit(1);
}
if ((client_protocol_version = s2n_connection_get_client_protocol_version(conn)) < 0) {
fprintf(stderr, "Could not get client protocol version\n");
exit(1);
}
if ((server_protocol_version = s2n_connection_get_server_protocol_version(conn)) < 0) {
fprintf(stderr, "Could not get server protocol version\n");
exit(1);
}
if ((actual_protocol_version = s2n_connection_get_actual_protocol_version(conn)) < 0) {
fprintf(stderr, "Could not get actual protocol version\n");
exit(1);
}
printf("Client hello version: %d\n", client_hello_version);
printf("Client protocol version: %d\n", client_protocol_version);
printf("Server protocol version: %d\n", server_protocol_version);
printf("Actual protocol version: %d\n", actual_protocol_version);
if (s2n_get_server_name(conn)) {
printf("Server name: %s\n", s2n_get_server_name(conn));
}
if (s2n_get_application_protocol(conn)) {
printf("Application protocol: %s\n", s2n_get_application_protocol(conn));
}
uint32_t length;
const uint8_t *status = s2n_connection_get_ocsp_response(conn, &length);
if (status && length > 0) {
fprintf(stderr, "OCSP response received, length %d\n", length);
}
printf("Cipher negotiated: %s\n", s2n_connection_get_cipher(conn));
char buf[BUFFERSIZE + 1];
int bytes_read, bytes_written;
// Make sure stdin is a terminal.
if (!isatty(STDIN_FILENO))
{
fprintf(stderr, "Not a terminal.\n");
exit(EXIT_FAILURE);
}
// Save the terminal attributes so we can restore them later.
tcgetattr(STDIN_FILENO, &saved_attributes);
atexit(reset_input_mode);
// Set the funny terminal modes.
struct termios tattr;
tcgetattr(STDIN_FILENO, &tattr);
tattr.c_lflag &= ~(ICANON | ECHO); // Clear ICANON and ECHO.
tattr.c_cc[VMIN] = 1;
tattr.c_cc[VTIME] = 0;
tcsetattr(STDIN_FILENO, TCSAFLUSH, &tattr);
fd_set master, readfds;
FD_ZERO(&master);
FD_SET(STDIN_FILENO, &master);
FD_SET(sockfd, &master);
for(;;)
{
readfds = master;
select(sockfd + 1, &readfds, NULL, NULL, NULL);
if(FD_ISSET(STDIN_FILENO, &readfds))
{
bytes_read = read(STDIN_FILENO, buf, BUFFERSIZE);
if(bytes_read < 1) break;
char *buf_ptr = buf;
int bytes_available = bytes_read;
do
{
bytes_written = s2n_send(conn, buf_ptr, bytes_available, &blocked);
if(bytes_written < 0) break;
bytes_available -= bytes_written;
buf_ptr += bytes_written;
} while(bytes_available || blocked);
}
if(FD_ISSET(sockfd, &readfds))
{
do
{
bytes_read = s2n_recv(conn, buf, BUFFERSIZE, &blocked);
if(bytes_read < 1) break;
write(STDOUT_FILENO, buf, bytes_read);
} while(blocked);
}
//if(nbytes != mbytes) printf("nbytes [%d] != mbytes [%d] \n", nbytes, mbytes);
}
close(sockfd);
s2n_connection_free(conn);
s2n_config_free(config);
s2n_cleanup();
printf("\nBYE!\n");
return 0;
}
