Move examples from example/simple to example/.

example/sftp_nonblock.c

@@ -0,0 +1,273 @@
+/*
+ * $Id: sftp_nonblock.c,v 1.18 2009/04/28 10:35:30 bagder Exp $
+ *
+ * Sample showing how to do SFTP non-blocking transfers.
+ *
+ * The sample code has default values for host name, user name, password
+ * and path to copy, but you can specify them on the command line like:
+ *
+ * "sftp_nonblock 192.168.0.1 user password /tmp/secrets"
+ */
+
+#include "libssh2_config.h"
+#include <libssh2.h>
+#include <libssh2_sftp.h>
+
+#ifdef HAVE_WINSOCK2_H
+# include <winsock2.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+#ifdef HAVE_SYS_SELECT_H
+# include <sys/select.h>
+#endif
+# ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+# include <arpa/inet.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+
+#include <sys/types.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <ctype.h>
+
+/* diff in ms */
+static long tvdiff(struct timeval newer, struct timeval older)
+{
+  return (newer.tv_sec-older.tv_sec)*1000+
+      (newer.tv_usec-older.tv_usec)/1000;
+}
+
+static int waitsocket(int 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);
+
+    FD_SET(socket_fd, &fd);
+
+    /* 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(socket_fd + 1, readfd, writefd, NULL, &timeout);
+
+    return rc;
+}
+
+int main(int argc, char *argv[])
+{
+    unsigned long hostaddr;
+    int sock, i, auth_pw = 1;
+    struct sockaddr_in sin;
+    const char *fingerprint;
+    LIBSSH2_SESSION *session;
+    const char *username="username";
+    const char *password="password";
+    const char *sftppath="/tmp/TEST";
+    struct timeval start;
+    struct timeval end;
+    int rc;
+    int total = 0;
+    long time_ms;
+    int spin = 0;
+#if defined(HAVE_IOCTLSOCKET)
+    long flag = 1;
+#endif
+    LIBSSH2_SFTP *sftp_session;
+    LIBSSH2_SFTP_HANDLE *sftp_handle;
+
+#ifdef WIN32
+    WSADATA wsadata;
+
+    WSAStartup(MAKEWORD(2,0), &wsadata);
+#endif
+
+    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) {
+        sftppath = argv[4];
+    }
+    /*
+     * The application code is responsible for creating the socket
+     * and establishing the connection
+     */
+    sock = socket(AF_INET, SOCK_STREAM, 0);
+
+    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)) != 0) {
+        fprintf(stderr, "failed to connect!\n");
+        return -1;
+    }
+
+    /* Create a session instance */
+    session = libssh2_session_init();
+    if (!session)
+        return -1;
+
+    /* Since we have set non-blocking, tell libssh2 we are non-blocking */
+    libssh2_session_set_blocking(session, 0);
+
+    gettimeofday(&start, NULL);
+
+    /* ... start it up. This will trade welcome banners, exchange keys,
+        * and setup crypto, compression, and MAC layers
+        */
+    while ((rc = libssh2_session_startup(session, sock)) ==
+           LIBSSH2_ERROR_EAGAIN);
+    if (rc) {
+        fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
+        return -1;
+    }
+
+    /* At this point we havn't yet authenticated.  The first thing to do
+        * is check the hostkey's fingerprint against our known hosts Your app
+        * may have it hard coded, may go to a file, may present it to the
+        * user, that's your call
+        */
+    fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_MD5);
+    fprintf(stderr, "Fingerprint: ");
+    for(i = 0; i < 16; 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,
+                                                    "/home/username/"
+                                                    ".ssh/id_rsa.pub",
+                                                    "/home/username/"
+                                                    ".ssh/id_rsa",
+                                                    password)) ==
+               LIBSSH2_ERROR_EAGAIN);
+        if (rc) {
+            fprintf(stderr, "\tAuthentication by public key failed\n");
+            goto shutdown;
+        }
+    }
+#if 0
+    libssh2_trace(session, LIBSSH2_TRACE_CONN);
+#endif
+    fprintf(stderr, "libssh2_sftp_init()!\n");
+    do {
+        sftp_session = libssh2_sftp_init(session);
+
+        if(!sftp_session) {
+            if(libssh2_session_last_errno(session) ==
+               LIBSSH2_ERROR_EAGAIN) {
+                fprintf(stderr, "non-blocking init\n");
+                waitsocket(sock, session); /* now we wait */
+            }
+            else {
+                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_READ, 0);
+
+        if (!sftp_handle) {
+            if (libssh2_session_last_errno(session) != LIBSSH2_ERROR_EAGAIN) {
+                fprintf(stderr, "Unable to open file with SFTP\n");
+                goto shutdown;
+            }
+            else {
+                fprintf(stderr, "non-blocking open\n");
+                waitsocket(sock, session); /* now we wait */
+            }
+        }
+    } while (!sftp_handle);
+
+    fprintf(stderr, "libssh2_sftp_open() is done, now receive data!\n");
+    do {
+        char mem[1024*24];
+
+        /* loop until we fail */
+        while ((rc = libssh2_sftp_read(sftp_handle, mem,
+                                       sizeof(mem))) == LIBSSH2_ERROR_EAGAIN) {
+            spin++;
+            waitsocket(sock, session); /* now we wait */
+        }
+        if (rc > 0) {
+            total += rc;
+            write(1, mem, rc);
+        } else {
+            break;
+        }
+    } while (1);
+
+    gettimeofday(&end, NULL);
+    time_ms = tvdiff(end, start);
+    printf("Got %d bytes in %ld ms = %.1f bytes/sec spin: %d\n", total,
+           time_ms, total/(time_ms/1000.0), spin );
+
+    libssh2_sftp_close(sftp_handle);
+    libssh2_sftp_shutdown(sftp_session);
+
+shutdown:
+
+    printf("libssh2_session_disconnect\n");
+    while ((rc = libssh2_session_disconnect(session,
+                                            "Normal Shutdown, Thank you")) ==
+           LIBSSH2_ERROR_EAGAIN);
+    libssh2_session_free(session);
+
+#ifdef WIN32
+    closesocket(sock);
+#else
+    close(sock);
+#endif
+    fprintf(stderr, "all done\n");
+    return 0;
+}