mirror of
https://github.com/libssh2/libssh2.git
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31d71a94f2
The select() is just to make it nicer so that it doesn't crazy-loop on EAGAIN. The buffer size thing is mostly to verify that this really work as supposed. Transfer timing is just a minor thing, but it can just as well be there and help us time and work on performance easier using out of the box examples.
280 lines
7.1 KiB
C
280 lines
7.1 KiB
C
/*
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* $Id: sftp_write_nonblock.c,v 1.14 2009/04/28 10:35:30 bagder Exp $
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*
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* Sample showing how to do SFTP non-blocking write transfers.
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*
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* The sample code has default values for host name, user name, password
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* and path to copy, but you can specify them on the command line like:
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*
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* "sftp 192.168.0.1 user password sftp_write_nonblock.c /tmp/sftp_write_nonblock.c"
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*/
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#include "libssh2_config.h"
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#include <libssh2.h>
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#include <libssh2_sftp.h>
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#ifdef HAVE_WINSOCK2_H
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# include <winsock2.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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# include <sys/socket.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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# ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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# include <arpa/inet.h>
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#endif
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#include <sys/types.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <time.h>
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static int waitsocket(int socket_fd, LIBSSH2_SESSION *session)
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{
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struct timeval timeout;
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int rc;
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fd_set fd;
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fd_set *writefd = NULL;
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fd_set *readfd = NULL;
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int dir;
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timeout.tv_sec = 10;
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timeout.tv_usec = 0;
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FD_ZERO(&fd);
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FD_SET(socket_fd, &fd);
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/* now make sure we wait in the correct direction */
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dir = libssh2_session_block_directions(session);
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if(dir & LIBSSH2_SESSION_BLOCK_INBOUND)
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readfd = &fd;
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if(dir & LIBSSH2_SESSION_BLOCK_OUTBOUND)
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writefd = &fd;
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rc = select(socket_fd + 1, readfd, writefd, NULL, &timeout);
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return rc;
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}
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int main(int argc, char *argv[])
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{
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unsigned long hostaddr;
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int sock, i, auth_pw = 1;
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struct sockaddr_in sin;
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const char *fingerprint;
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LIBSSH2_SESSION *session;
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const char *username="username";
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const char *password="password";
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const char *loclfile="sftp_write_nonblock.c";
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const char *sftppath="/tmp/sftp_write_nonblock.c";
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int rc;
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#if defined(HAVE_IOCTLSOCKET)
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long flag = 1;
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#endif
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FILE *local;
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LIBSSH2_SFTP *sftp_session;
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LIBSSH2_SFTP_HANDLE *sftp_handle;
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char mem[1024 * 100];
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size_t nread;
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char *ptr;
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time_t start;
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long total = 0;
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int duration;
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#ifdef WIN32
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WSADATA wsadata;
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WSAStartup(MAKEWORD(2,0), &wsadata);
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#endif
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if (argc > 1) {
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hostaddr = inet_addr(argv[1]);
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} else {
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hostaddr = htonl(0x7F000001);
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}
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if (argc > 2) {
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username = argv[2];
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}
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if (argc > 3) {
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password = argv[3];
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}
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if (argc > 4) {
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loclfile = argv[4];
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}
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if (argc > 5) {
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sftppath = argv[5];
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}
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rc = libssh2_init (0);
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if (rc != 0) {
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fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
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return 1;
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}
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local = fopen(loclfile, "rb");
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if (!local) {
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printf("Can't local file %s\n", loclfile);
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return -1;
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}
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/*
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* The application code is responsible for creating the socket
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* and establishing the connection
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*/
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sock = socket(AF_INET, SOCK_STREAM, 0);
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sin.sin_family = AF_INET;
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sin.sin_port = htons(22);
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sin.sin_addr.s_addr = hostaddr;
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if (connect(sock, (struct sockaddr*)(&sin),
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sizeof(struct sockaddr_in)) != 0) {
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fprintf(stderr, "failed to connect!\n");
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return -1;
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}
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/* Create a session instance
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*/
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session = libssh2_session_init();
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if (!session)
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return -1;
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/* Since we have set non-blocking, tell libssh2 we are non-blocking */
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libssh2_session_set_blocking(session, 0);
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/* ... start it up. This will trade welcome banners, exchange keys,
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* and setup crypto, compression, and MAC layers
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*/
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while ((rc = libssh2_session_startup(session, sock))
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== LIBSSH2_ERROR_EAGAIN);
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if (rc) {
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fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
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return -1;
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}
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/* At this point we havn't yet authenticated. The first thing to do is
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* check the hostkey's fingerprint against our known hosts Your app may
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* have it hard coded, may go to a file, may present it to the user,
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* that's your call
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*/
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fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);
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printf("Fingerprint: ");
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for(i = 0; i < 20; i++) {
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printf("%02X ", (unsigned char)fingerprint[i]);
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}
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printf("\n");
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if (auth_pw) {
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/* We could authenticate via password */
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while ((rc = libssh2_userauth_password(session, username, password)) ==
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LIBSSH2_ERROR_EAGAIN);
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if (rc) {
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printf("Authentication by password failed.\n");
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goto shutdown;
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}
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} else {
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/* Or by public key */
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while ((rc = libssh2_userauth_publickey_fromfile(session, username,
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"/home/username/.ssh/id_rsa.pub",
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"/home/username/.ssh/id_rsa",
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password)) ==
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LIBSSH2_ERROR_EAGAIN);
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if (rc) {
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printf("\tAuthentication by public key failed\n");
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goto shutdown;
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}
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}
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fprintf(stderr, "libssh2_sftp_init()!\n");
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do {
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sftp_session = libssh2_sftp_init(session);
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if (!sftp_session &&
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(libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN)) {
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fprintf(stderr, "Unable to init SFTP session\n");
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goto shutdown;
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}
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} while (!sftp_session);
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fprintf(stderr, "libssh2_sftp_open()!\n");
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/* Request a file via SFTP */
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do {
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sftp_handle =
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libssh2_sftp_open(sftp_session, sftppath,
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LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC,
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LIBSSH2_SFTP_S_IRUSR|LIBSSH2_SFTP_S_IWUSR|
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LIBSSH2_SFTP_S_IRGRP|LIBSSH2_SFTP_S_IROTH);
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if (!sftp_handle &&
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(libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN)) {
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fprintf(stderr, "Unable to open file with SFTP\n");
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goto shutdown;
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}
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} while (!sftp_handle);
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fprintf(stderr, "libssh2_sftp_open() is done, now send data!\n");
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start = time(NULL);
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do {
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nread = fread(mem, 1, sizeof(mem), local);
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if (nread <= 0) {
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/* end of file */
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break;
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}
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ptr = mem;
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total += nread;
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do {
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/* write data in a loop until we block */
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while ((rc = libssh2_sftp_write(sftp_handle, ptr, nread)) ==
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LIBSSH2_ERROR_EAGAIN) {
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waitsocket(sock, session);
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}
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if(rc < 0)
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break;
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ptr += rc;
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nread -= rc;
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} while (nread);
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} while (rc > 0);
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duration = (int)(time(NULL)-start);
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printf("%ld bytes in %d seconds makes %.1f bytes/sec\n",
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total, duration, total/(double)duration);
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fclose(local);
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libssh2_sftp_close(sftp_handle);
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libssh2_sftp_shutdown(sftp_session);
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shutdown:
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while (libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing")
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== LIBSSH2_ERROR_EAGAIN);
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libssh2_session_free(session);
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#ifdef WIN32
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closesocket(sock);
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#else
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close(sock);
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#endif
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printf("all done\n");
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libssh2_exit();
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return 0;
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}
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