#include "libssh2_setup.h"

#include <libssh2.h>

#include <libssh2_sftp.h>

#ifdef HAVE_SYS_SOCKET_H

#include <sys/socket.h>

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#ifdef HAVE_NETINET_IN_H

#include <netinet/in.h>

#ifdef HAVE_ARPA_INET_H

#include <arpa/inet.h>

#ifdef HAVE_SYS_TIME_H

#include <sys/time.h>

#include <stdio.h>

#include <time.h> /* for time() */

#include <string.h>

static const char *pubkey = "/home/username/.ssh/id_rsa.pub";

static const char *privkey = "/home/username/.ssh/id_rsa";

static const char *username = "username";

static const char *password = "password";

static const char *loclfile = "sftp_write_nonblock.c";

static const char *sftppath = "/tmp/sftp_write_nonblock.c";

static int waitsocket(libssh2_socket_t socket_fd, LIBSSH2_SESSION *session)

{

struct timeval timeout;

int rc;

fd_set fd;

fd_set *writefd = NULL;

fd_set *readfd = NULL;

int dir;

timeout.tv_sec = 10;

timeout.tv_usec = 0;

FD_ZERO(&fd);

#if defined(__GNUC__)

#pragma GCC diagnostic push

#pragma GCC diagnostic ignored "-Wsign-conversion"

FD_SET(socket_fd, &fd);

#if defined(__GNUC__)

#pragma GCC diagnostic pop

/* now make sure we wait in the correct direction */

dir = libssh2_session_block_directions(session);

if(dir & LIBSSH2_SESSION_BLOCK_INBOUND)

readfd = &fd;

if(dir & LIBSSH2_SESSION_BLOCK_OUTBOUND)

writefd = &fd;

rc = select((int)(socket_fd + 1), readfd, writefd, NULL, &timeout);

return rc;

}

int main(int argc, char *argv[])

{

uint32_t hostaddr;

libssh2_socket_t sock;

int i, auth_pw = 1;

struct sockaddr_in sin;

const char *fingerprint;

int rc;

LIBSSH2_SESSION *session = NULL;

LIBSSH2_SFTP *sftp_session;

LIBSSH2_SFTP_HANDLE *sftp_handle;

FILE *local;

char mem[1024 * 1000];

size_t nread;

ssize_t nwritten;

size_t memuse;

time_t start;

libssh2_struct_stat_size total = 0;

int duration;

#ifdef _WIN32

WSADATA wsadata;

rc = WSAStartup(MAKEWORD(2, 0), &wsadata);

if(rc) {

fprintf(stderr, "WSAStartup failed with error: %d\n", rc);

return 1;

}

if(argc > 1) {

hostaddr = inet_addr(argv[1]);

}

else {

hostaddr = htonl(0x7F000001);

}

if(argc > 2) {

username = argv[2];

}

if(argc > 3) {

password = argv[3];

}

if(argc > 4) {

loclfile = argv[4];

}

if(argc > 5) {

sftppath = argv[5];

}

rc = libssh2_init(0);

if(rc) {

fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);

return 1;

}

local = fopen(loclfile, "rb");

if(!local) {

fprintf(stderr, "Cannot open local file %s\n", loclfile);

return 1;

}

/*

sock = socket(AF_INET, SOCK_STREAM, 0);

if(sock == LIBSSH2_INVALID_SOCKET) {

fprintf(stderr, "failed to create socket.\n");

goto shutdown;

}

sin.sin_family = AF_INET;

sin.sin_port = htons(22);

sin.sin_addr.s_addr = hostaddr;

if(connect(sock, (struct sockaddr*)(&sin), sizeof(struct sockaddr_in))) {

fprintf(stderr, "failed to connect.\n");

goto shutdown;

}

/* Create a session instance */

session = libssh2_session_init();

if(!session) {

fprintf(stderr, "Could not initialize SSH session.\n");

goto shutdown;

}

/* Since we have set non-blocking, tell libssh2 we are non-blocking */

libssh2_session_set_blocking(session, 0);

/* ... start it up. This will trade welcome banners, exchange keys,

while((rc = libssh2_session_handshake(session, sock)) ==

LIBSSH2_ERROR_EAGAIN);

if(rc) {

fprintf(stderr, "Failure establishing SSH session: %d\n", rc);

goto shutdown;

}

/* At this point we have not yet authenticated. The first thing to do

fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);

fprintf(stderr, "Fingerprint: ");

for(i = 0; i < 20; i++) {

fprintf(stderr, "%02X ", (unsigned char)fingerprint[i]);

}

fprintf(stderr, "\n");

if(auth_pw) {

/* We could authenticate via password */

while((rc = libssh2_userauth_password(session, username, password)) ==

LIBSSH2_ERROR_EAGAIN);

if(rc) {

fprintf(stderr, "Authentication by password failed.\n");

goto shutdown;

}

}

else {

/* Or by public key */

while((rc = libssh2_userauth_publickey_fromfile(session, username,

pubkey, privkey,

password)) ==

LIBSSH2_ERROR_EAGAIN);

if(rc) {

fprintf(stderr, "Authentication by public key failed.\n");

goto shutdown;

}

}

fprintf(stderr, "libssh2_sftp_init().\n");

do {

sftp_session = libssh2_sftp_init(session);

if(!sftp_session &&

libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN) {

fprintf(stderr, "Unable to init SFTP session\n");

goto shutdown;

}

} while(!sftp_session);

fprintf(stderr, "libssh2_sftp_open().\n");

/* Request a file via SFTP */

do {

sftp_handle = libssh2_sftp_open(sftp_session, sftppath,

LIBSSH2_FXF_WRITE |

LIBSSH2_FXF_CREAT |

LIBSSH2_FXF_TRUNC,

LIBSSH2_SFTP_S_IRUSR |

LIBSSH2_SFTP_S_IWUSR |

LIBSSH2_SFTP_S_IRGRP |

LIBSSH2_SFTP_S_IROTH);

if(!sftp_handle &&

libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN) {

fprintf(stderr, "Unable to open file with SFTP: %ld\n",

libssh2_sftp_last_error(sftp_session));

goto shutdown;

}

} while(!sftp_handle);

fprintf(stderr, "libssh2_sftp_open() is done, now send data.\n");

start = time(NULL);

memuse = 0; /* it starts blank */

do {

nread = fread(&mem[memuse], 1, sizeof(mem) - memuse, local);

if(nread <= 0) {

/* end of file */

if(memuse > 0)

/* the previous sending is not finished */

nread = 0;

else

break;

}

memuse += nread;

total += (libssh2_struct_stat_size)nread;

/* write data in a loop until we block */

while((nwritten = libssh2_sftp_write(sftp_handle, mem, memuse)) ==

LIBSSH2_ERROR_EAGAIN) {

waitsocket(sock, session);

}

if(nwritten < 0)

break;

if(memuse - (size_t)nwritten) {

/* make room for more data at the end of the buffer */

memmove(&mem[0], &mem[nwritten], memuse - (size_t)nwritten);

memuse -= (size_t)nwritten;

}

else

/* 'mem' was consumed fully */

memuse = 0;

} while(nwritten > 0);

duration = (int)(time(NULL) - start);

fprintf(stderr, "%ld bytes in %d seconds makes %.1f bytes/sec\n",

(long)total, duration, (double)total / duration);

fclose(local);

libssh2_sftp_close(sftp_handle);

libssh2_sftp_shutdown(sftp_session);

shutdown:

if(session) {

while(libssh2_session_disconnect(session, "Normal Shutdown") ==

LIBSSH2_ERROR_EAGAIN);

libssh2_session_free(session);

}

if(sock != LIBSSH2_INVALID_SOCKET) {

shutdown(sock, 2);

LIBSSH2_SOCKET_CLOSE(sock);

}

fprintf(stderr, "all done\n");

libssh2_exit();

#ifdef _WIN32

WSACleanup();

return 0;

}