/* * Sample showing how to do an SCP upload. */ #include "libssh2_config.h"#include <libssh2.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_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> 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 = NULL;    LIBSSH2_CHANNEL *channel;    const char *username="username";    const char *password="password";    const char *loclfile="scp_write.c";    const char *scppath="/tmp/TEST";    FILE *local;    int rc;    char mem[1024];    size_t nread;    char *ptr;    struct stat fileinfo; #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) {        loclfile = argv[4];    }    if (argc > 5) {        scppath = argv[5];    }     rc = libssh2_init (0);    if (rc != 0) {        fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);        return 1;    }     local = fopen(loclfile, "rb");    if (!local) {        fprintf(stderr, "Can't open local file %s\n", loclfile);        return -1;    }     stat(loclfile, &fileinfo);     /* Ultra basic "connect to port 22 on localhost"     * Your code is responsible for creating the socket establishing the     * connection     */    sock = socket(AF_INET, SOCK_STREAM, 0);    if(-1 == sock) {        fprintf(stderr, "failed to create socket!\n");        return -1;    }     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;     /* ... start it up. This will trade welcome banners, exchange keys,     * and setup crypto, compression, and MAC layers     */    rc = libssh2_session_handshake(session, sock);    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_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 */        if (libssh2_userauth_password(session, username, password)) {            fprintf(stderr, "Authentication by password failed.\n");            goto shutdown;        }    } else {        /* Or by public key */        if (libssh2_userauth_publickey_fromfile(session, username,                            "/home/username/.ssh/id_rsa.pub",                            "/home/username/.ssh/id_rsa",                            password)) {            fprintf(stderr, "\tAuthentication by public key failed\n");            goto shutdown;        }    }     /* Send a file via scp. The mode parameter must only have permissions! */    channel = libssh2_scp_send(session, scppath, fileinfo.st_mode & 0777,                               (unsigned long)fileinfo.st_size);     if (!channel) {        char *errmsg;        int errlen;        int err = libssh2_session_last_error(session, &errmsg, &errlen, 0);        fprintf(stderr, "Unable to open a session: (%d) %s\n", err, errmsg);        goto shutdown;    }     fprintf(stderr, "SCP session waiting to send file\n");    do {        nread = fread(mem, 1, sizeof(mem), local);        if (nread <= 0) {            /* end of file */            break;        }        ptr = mem;         do {            /* write the same data over and over, until error or completion */            rc = libssh2_channel_write(channel, ptr, nread);            if (rc < 0) {                fprintf(stderr, "ERROR %d\n", rc);                break;            }            else {                /* rc indicates how many bytes were written this time */                ptr += rc;                nread -= rc;            }        } while (nread);     } while (1);     fprintf(stderr, "Sending EOF\n");    libssh2_channel_send_eof(channel);     fprintf(stderr, "Waiting for EOF\n");    libssh2_channel_wait_eof(channel);     fprintf(stderr, "Waiting for channel to close\n");    libssh2_channel_wait_closed(channel);     libssh2_channel_free(channel);    channel = NULL;  shutdown:     if(session) {        libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing");        libssh2_session_free(session);    }#ifdef WIN32    closesocket(sock);#else    close(sock);#endif    if (local)        fclose(local);    fprintf(stderr, "all done\n");     libssh2_exit();     return 0;}