forked from risacher/putty-cac
/
pscp.c
2407 lines (2159 loc) · 60.1 KB
/
pscp.c
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/*
* scp.c - Scp (Secure Copy) client for PuTTY.
* Joris van Rantwijk, Simon Tatham
*
* This is mainly based on ssh-1.2.26/scp.c by Timo Rinne & Tatu Ylonen.
* They, in turn, used stuff from BSD rcp.
*
* (SGT, 2001-09-10: Joris van Rantwijk assures me that although
* this file as originally submitted was inspired by, and
* _structurally_ based on, ssh-1.2.26's scp.c, there wasn't any
* actual code duplicated, so the above comment shouldn't give rise
* to licensing issues.)
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <time.h>
#include <assert.h>
#define PUTTY_DO_GLOBALS
#include "putty.h"
#include "psftp.h"
#include "ssh.h"
#include "sftp.h"
#include "storage.h"
#include "int64.h"
static int list = 0;
static int verbose = 0;
static int recursive = 0;
static int preserve = 0;
static int targetshouldbedirectory = 0;
static int statistics = 1;
static int prev_stats_len = 0;
static int scp_unsafe_mode = 0;
static int errs = 0;
static int try_scp = 1;
static int try_sftp = 1;
static int main_cmd_is_sftp = 0;
static int fallback_cmd_is_sftp = 0;
static int using_sftp = 0;
static int uploading = 0;
static Backend *back;
static void *backhandle;
static Conf *conf;
int sent_eof = FALSE;
static void source(char *src);
static void rsource(char *src);
static void sink(char *targ, char *src);
const char *const appname = "PSCP";
/*
* The maximum amount of queued data we accept before we stop and
* wait for the server to process some.
*/
#define MAX_SCP_BUFSIZE 16384
void ldisc_send(void *handle, char *buf, int len, int interactive)
{
/*
* This is only here because of the calls to ldisc_send(NULL,
* 0) in ssh.c. Nothing in PSCP actually needs to use the ldisc
* as an ldisc. So if we get called with any real data, I want
* to know about it.
*/
assert(len == 0);
}
static void tell_char(FILE * stream, char c)
{
fputc(c, stream);
}
static void tell_str(FILE * stream, char *str)
{
unsigned int i;
for (i = 0; i < strlen(str); ++i)
tell_char(stream, str[i]);
}
static void tell_user(FILE * stream, char *fmt, ...)
{
char *str, *str2;
va_list ap;
va_start(ap, fmt);
str = dupvprintf(fmt, ap);
va_end(ap);
str2 = dupcat(str, "\n", NULL);
sfree(str);
tell_str(stream, str2);
sfree(str2);
}
/*
* Print an error message and perform a fatal exit.
*/
void fatalbox(char *fmt, ...)
{
char *str, *str2;
va_list ap;
va_start(ap, fmt);
str = dupvprintf(fmt, ap);
str2 = dupcat("Fatal: ", str, "\n", NULL);
sfree(str);
va_end(ap);
tell_str(stderr, str2);
sfree(str2);
errs++;
cleanup_exit(1);
}
void modalfatalbox(char *fmt, ...)
{
char *str, *str2;
va_list ap;
va_start(ap, fmt);
str = dupvprintf(fmt, ap);
str2 = dupcat("Fatal: ", str, "\n", NULL);
sfree(str);
va_end(ap);
tell_str(stderr, str2);
sfree(str2);
errs++;
cleanup_exit(1);
}
void nonfatal(char *fmt, ...)
{
char *str, *str2;
va_list ap;
va_start(ap, fmt);
str = dupvprintf(fmt, ap);
str2 = dupcat("Error: ", str, "\n", NULL);
sfree(str);
va_end(ap);
tell_str(stderr, str2);
sfree(str2);
errs++;
}
void connection_fatal(void *frontend, char *fmt, ...)
{
char *str, *str2;
va_list ap;
va_start(ap, fmt);
str = dupvprintf(fmt, ap);
str2 = dupcat("Fatal: ", str, "\n", NULL);
sfree(str);
va_end(ap);
tell_str(stderr, str2);
sfree(str2);
errs++;
cleanup_exit(1);
}
/*
* In pscp, all agent requests should be synchronous, so this is a
* never-called stub.
*/
void agent_schedule_callback(void (*callback)(void *, void *, int),
void *callback_ctx, void *data, int len)
{
assert(!"We shouldn't be here");
}
/*
* Receive a block of data from the SSH link. Block until all data
* is available.
*
* To do this, we repeatedly call the SSH protocol module, with our
* own trap in from_backend() to catch the data that comes back. We
* do this until we have enough data.
*/
static unsigned char *outptr; /* where to put the data */
static unsigned outlen; /* how much data required */
static unsigned char *pending = NULL; /* any spare data */
static unsigned pendlen = 0, pendsize = 0; /* length and phys. size of buffer */
int from_backend(void *frontend, int is_stderr, const char *data, int datalen)
{
unsigned char *p = (unsigned char *) data;
unsigned len = (unsigned) datalen;
/*
* stderr data is just spouted to local stderr and otherwise
* ignored.
*/
if (is_stderr) {
if (len > 0)
if (fwrite(data, 1, len, stderr) < len)
/* oh well */;
return 0;
}
if ((outlen > 0) && (len > 0)) {
unsigned used = outlen;
if (used > len)
used = len;
memcpy(outptr, p, used);
outptr += used;
outlen -= used;
p += used;
len -= used;
}
if (len > 0) {
if (pendsize < pendlen + len) {
pendsize = pendlen + len + 4096;
pending = sresize(pending, pendsize, unsigned char);
}
memcpy(pending + pendlen, p, len);
pendlen += len;
}
return 0;
}
int from_backend_untrusted(void *frontend_handle, const char *data, int len)
{
/*
* No "untrusted" output should get here (the way the code is
* currently, it's all diverted by FLAG_STDERR).
*/
assert(!"Unexpected call to from_backend_untrusted()");
return 0; /* not reached */
}
int from_backend_eof(void *frontend)
{
/*
* We usually expect to be the party deciding when to close the
* connection, so if we see EOF before we sent it ourselves, we
* should panic. The exception is if we're using old-style scp and
* downloading rather than uploading.
*/
if ((using_sftp || uploading) && !sent_eof) {
connection_fatal(frontend,
"Received unexpected end-of-file from server");
}
return FALSE;
}
static int ssh_scp_recv(unsigned char *buf, int len)
{
outptr = buf;
outlen = len;
/*
* See if the pending-input block contains some of what we
* need.
*/
if (pendlen > 0) {
unsigned pendused = pendlen;
if (pendused > outlen)
pendused = outlen;
memcpy(outptr, pending, pendused);
memmove(pending, pending + pendused, pendlen - pendused);
outptr += pendused;
outlen -= pendused;
pendlen -= pendused;
if (pendlen == 0) {
pendsize = 0;
sfree(pending);
pending = NULL;
}
if (outlen == 0)
return len;
}
while (outlen > 0) {
if (back->exitcode(backhandle) >= 0 || ssh_sftp_loop_iteration() < 0)
return 0; /* doom */
}
return len;
}
/*
* Loop through the ssh connection and authentication process.
*/
static void ssh_scp_init(void)
{
while (!back->sendok(backhandle)) {
if (back->exitcode(backhandle) >= 0) {
errs++;
return;
}
if (ssh_sftp_loop_iteration() < 0) {
errs++;
return; /* doom */
}
}
/* Work out which backend we ended up using. */
if (!ssh_fallback_cmd(backhandle))
using_sftp = main_cmd_is_sftp;
else
using_sftp = fallback_cmd_is_sftp;
if (verbose) {
if (using_sftp)
tell_user(stderr, "Using SFTP");
else
tell_user(stderr, "Using SCP1");
}
}
/*
* Print an error message and exit after closing the SSH link.
*/
static void bump(char *fmt, ...)
{
char *str, *str2;
va_list ap;
va_start(ap, fmt);
str = dupvprintf(fmt, ap);
va_end(ap);
str2 = dupcat(str, "\n", NULL);
sfree(str);
tell_str(stderr, str2);
sfree(str2);
errs++;
if (back != NULL && back->connected(backhandle)) {
char ch;
back->special(backhandle, TS_EOF);
sent_eof = TRUE;
ssh_scp_recv((unsigned char *) &ch, 1);
}
cleanup_exit(1);
}
/*
* Wait for the reply to a single SFTP request. Parallels the same
* function in psftp.c (but isn't centralised into sftp.c because the
* latter module handles SFTP only and shouldn't assume that SFTP is
* the only thing going on by calling connection_fatal).
*/
struct sftp_packet *sftp_wait_for_reply(struct sftp_request *req)
{
struct sftp_packet *pktin;
struct sftp_request *rreq;
sftp_register(req);
pktin = sftp_recv();
if (pktin == NULL)
connection_fatal(NULL, "did not receive SFTP response packet "
"from server");
rreq = sftp_find_request(pktin);
if (rreq != req)
connection_fatal(NULL, "unable to understand SFTP response packet "
"from server: %s", fxp_error());
return pktin;
}
/*
* Open an SSH connection to user@host and execute cmd.
*/
static void do_cmd(char *host, char *user, char *cmd)
{
const char *err;
char *realhost;
void *logctx;
if (host == NULL || host[0] == '\0')
bump("Empty host name");
/*
* Remove a colon suffix.
*/
host[host_strcspn(host, ":")] = '\0';
/*
* If we haven't loaded session details already (e.g., from -load),
* try looking for a session called "host".
*/
if (!loaded_session) {
/* Try to load settings for `host' into a temporary config */
Conf *conf2 = conf_new();
conf_set_str(conf2, CONF_host, "");
do_defaults(host, conf2);
if (conf_get_str(conf2, CONF_host)[0] != '\0') {
/* Settings present and include hostname */
/* Re-load data into the real config. */
do_defaults(host, conf);
} else {
/* Session doesn't exist or mention a hostname. */
/* Use `host' as a bare hostname. */
conf_set_str(conf, CONF_host, host);
}
} else {
/* Patch in hostname `host' to session details. */
conf_set_str(conf, CONF_host, host);
}
/*
* Force use of SSH. (If they got the protocol wrong we assume the
* port is useless too.)
*/
if (conf_get_int(conf, CONF_protocol) != PROT_SSH) {
conf_set_int(conf, CONF_protocol, PROT_SSH);
conf_set_int(conf, CONF_port, 22);
}
/*
* Enact command-line overrides.
*/
cmdline_run_saved(conf);
/*
* Muck about with the hostname in various ways.
*/
{
char *hostbuf = dupstr(conf_get_str(conf, CONF_host));
char *host = hostbuf;
char *p, *q;
/*
* Trim leading whitespace.
*/
host += strspn(host, " \t");
/*
* See if host is of the form user@host, and separate out
* the username if so.
*/
if (host[0] != '\0') {
char *atsign = strrchr(host, '@');
if (atsign) {
*atsign = '\0';
conf_set_str(conf, CONF_username, host);
host = atsign + 1;
}
}
/*
* Remove any remaining whitespace.
*/
p = hostbuf;
q = host;
while (*q) {
if (*q != ' ' && *q != '\t')
*p++ = *q;
q++;
}
*p = '\0';
conf_set_str(conf, CONF_host, hostbuf);
sfree(hostbuf);
}
/* Set username */
if (user != NULL && user[0] != '\0') {
conf_set_str(conf, CONF_username, user);
} else if (conf_get_str(conf, CONF_username)[0] == '\0') {
user = get_username();
if (!user)
bump("Empty user name");
else {
if (verbose)
tell_user(stderr, "Guessing user name: %s", user);
conf_set_str(conf, CONF_username, user);
sfree(user);
}
}
/*
* Disable scary things which shouldn't be enabled for simple
* things like SCP and SFTP: agent forwarding, port forwarding,
* X forwarding.
*/
conf_set_int(conf, CONF_x11_forward, 0);
conf_set_int(conf, CONF_agentfwd, 0);
conf_set_int(conf, CONF_ssh_simple, TRUE);
{
char *key;
while ((key = conf_get_str_nthstrkey(conf, CONF_portfwd, 0)) != NULL)
conf_del_str_str(conf, CONF_portfwd, key);
}
/*
* Set up main and possibly fallback command depending on
* options specified by user.
* Attempt to start the SFTP subsystem as a first choice,
* falling back to the provided scp command if that fails.
*/
conf_set_str(conf, CONF_remote_cmd2, "");
if (try_sftp) {
/* First choice is SFTP subsystem. */
main_cmd_is_sftp = 1;
conf_set_str(conf, CONF_remote_cmd, "sftp");
conf_set_int(conf, CONF_ssh_subsys, TRUE);
if (try_scp) {
/* Fallback is to use the provided scp command. */
fallback_cmd_is_sftp = 0;
conf_set_str(conf, CONF_remote_cmd2, cmd);
conf_set_int(conf, CONF_ssh_subsys2, FALSE);
} else {
/* Since we're not going to try SCP, we may as well try
* harder to find an SFTP server, since in the current
* implementation we have a spare slot. */
fallback_cmd_is_sftp = 1;
/* see psftp.c for full explanation of this kludge */
conf_set_str(conf, CONF_remote_cmd2,
"test -x /usr/lib/sftp-server &&"
" exec /usr/lib/sftp-server\n"
"test -x /usr/local/lib/sftp-server &&"
" exec /usr/local/lib/sftp-server\n"
"exec sftp-server");
conf_set_int(conf, CONF_ssh_subsys2, FALSE);
}
} else {
/* Don't try SFTP at all; just try the scp command. */
main_cmd_is_sftp = 0;
conf_set_str(conf, CONF_remote_cmd, cmd);
conf_set_int(conf, CONF_ssh_subsys, FALSE);
}
conf_set_int(conf, CONF_nopty, TRUE);
back = &ssh_backend;
err = back->init(NULL, &backhandle, conf,
conf_get_str(conf, CONF_host),
conf_get_int(conf, CONF_port),
&realhost, 0,
conf_get_int(conf, CONF_tcp_keepalives));
if (err != NULL)
bump("ssh_init: %s", err);
logctx = log_init(NULL, conf);
back->provide_logctx(backhandle, logctx);
console_provide_logctx(logctx);
ssh_scp_init();
if (verbose && realhost != NULL && errs == 0)
tell_user(stderr, "Connected to %s", realhost);
sfree(realhost);
}
/*
* Update statistic information about current file.
*/
static void print_stats(char *name, uint64 size, uint64 done,
time_t start, time_t now)
{
float ratebs;
unsigned long eta;
char *etastr;
int pct;
int len;
int elap;
double donedbl;
double sizedbl;
elap = (unsigned long) difftime(now, start);
if (now > start)
ratebs = (float) (uint64_to_double(done) / elap);
else
ratebs = (float) uint64_to_double(done);
if (ratebs < 1.0)
eta = (unsigned long) (uint64_to_double(uint64_subtract(size, done)));
else {
eta = (unsigned long)
((uint64_to_double(uint64_subtract(size, done)) / ratebs));
}
etastr = dupprintf("%02ld:%02ld:%02ld",
eta / 3600, (eta % 3600) / 60, eta % 60);
donedbl = uint64_to_double(done);
sizedbl = uint64_to_double(size);
pct = (int) (100 * (donedbl * 1.0 / sizedbl));
{
char donekb[40];
/* divide by 1024 to provide kB */
uint64_decimal(uint64_shift_right(done, 10), donekb);
len = printf("\r%-25.25s | %s kB | %5.1f kB/s | ETA: %8s | %3d%%",
name,
donekb, ratebs / 1024.0, etastr, pct);
if (len < prev_stats_len)
printf("%*s", prev_stats_len - len, "");
prev_stats_len = len;
if (uint64_compare(done, size) == 0)
printf("\n");
fflush(stdout);
}
free(etastr);
}
/*
* Find a colon in str and return a pointer to the colon.
* This is used to separate hostname from filename.
*/
static char *colon(char *str)
{
/* We ignore a leading colon, since the hostname cannot be
empty. We also ignore a colon as second character because
of filenames like f:myfile.txt. */
if (str[0] == '\0' || str[0] == ':' ||
(str[0] != '[' && str[1] == ':'))
return (NULL);
str += host_strcspn(str, ":/\\");
if (*str == ':')
return (str);
else
return (NULL);
}
/*
* Return a pointer to the portion of str that comes after the last
* slash (or backslash or colon, if `local' is TRUE).
*/
static char *stripslashes(char *str, int local)
{
char *p;
if (local) {
p = strchr(str, ':');
if (p) str = p+1;
}
p = strrchr(str, '/');
if (p) str = p+1;
if (local) {
p = strrchr(str, '\\');
if (p) str = p+1;
}
return str;
}
/*
* Determine whether a string is entirely composed of dots.
*/
static int is_dots(char *str)
{
return str[strspn(str, ".")] == '\0';
}
/*
* Wait for a response from the other side.
* Return 0 if ok, -1 if error.
*/
static int response(void)
{
char ch, resp, rbuf[2048];
int p;
if (ssh_scp_recv((unsigned char *) &resp, 1) <= 0)
bump("Lost connection");
p = 0;
switch (resp) {
case 0: /* ok */
return (0);
default:
rbuf[p++] = resp;
/* fallthrough */
case 1: /* error */
case 2: /* fatal error */
do {
if (ssh_scp_recv((unsigned char *) &ch, 1) <= 0)
bump("Protocol error: Lost connection");
rbuf[p++] = ch;
} while (p < sizeof(rbuf) && ch != '\n');
rbuf[p - 1] = '\0';
if (resp == 1)
tell_user(stderr, "%s", rbuf);
else
bump("%s", rbuf);
errs++;
return (-1);
}
}
int sftp_recvdata(char *buf, int len)
{
return ssh_scp_recv((unsigned char *) buf, len);
}
int sftp_senddata(char *buf, int len)
{
back->send(backhandle, buf, len);
return 1;
}
/* ----------------------------------------------------------------------
* sftp-based replacement for the hacky `pscp -ls'.
*/
static int sftp_ls_compare(const void *av, const void *bv)
{
const struct fxp_name *a = (const struct fxp_name *) av;
const struct fxp_name *b = (const struct fxp_name *) bv;
return strcmp(a->filename, b->filename);
}
void scp_sftp_listdir(char *dirname)
{
struct fxp_handle *dirh;
struct fxp_names *names;
struct fxp_name *ournames;
struct sftp_packet *pktin;
struct sftp_request *req;
int nnames, namesize;
int i;
if (!fxp_init()) {
tell_user(stderr, "unable to initialise SFTP: %s", fxp_error());
errs++;
return;
}
printf("Listing directory %s\n", dirname);
req = fxp_opendir_send(dirname);
pktin = sftp_wait_for_reply(req);
dirh = fxp_opendir_recv(pktin, req);
if (dirh == NULL) {
printf("Unable to open %s: %s\n", dirname, fxp_error());
} else {
nnames = namesize = 0;
ournames = NULL;
while (1) {
req = fxp_readdir_send(dirh);
pktin = sftp_wait_for_reply(req);
names = fxp_readdir_recv(pktin, req);
if (names == NULL) {
if (fxp_error_type() == SSH_FX_EOF)
break;
printf("Reading directory %s: %s\n", dirname, fxp_error());
break;
}
if (names->nnames == 0) {
fxp_free_names(names);
break;
}
if (nnames + names->nnames >= namesize) {
namesize += names->nnames + 128;
ournames = sresize(ournames, namesize, struct fxp_name);
}
for (i = 0; i < names->nnames; i++)
ournames[nnames++] = names->names[i];
names->nnames = 0; /* prevent free_names */
fxp_free_names(names);
}
req = fxp_close_send(dirh);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
/*
* Now we have our filenames. Sort them by actual file
* name, and then output the longname parts.
*/
if (nnames > 0)
qsort(ournames, nnames, sizeof(*ournames), sftp_ls_compare);
/*
* And print them.
*/
for (i = 0; i < nnames; i++)
printf("%s\n", ournames[i].longname);
sfree(ournames);
}
}
/* ----------------------------------------------------------------------
* Helper routines that contain the actual SCP protocol elements,
* implemented both as SCP1 and SFTP.
*/
static struct scp_sftp_dirstack {
struct scp_sftp_dirstack *next;
struct fxp_name *names;
int namepos, namelen;
char *dirpath;
char *wildcard;
int matched_something; /* wildcard match set was non-empty */
} *scp_sftp_dirstack_head;
static char *scp_sftp_remotepath, *scp_sftp_currentname;
static char *scp_sftp_wildcard;
static int scp_sftp_targetisdir, scp_sftp_donethistarget;
static int scp_sftp_preserve, scp_sftp_recursive;
static unsigned long scp_sftp_mtime, scp_sftp_atime;
static int scp_has_times;
static struct fxp_handle *scp_sftp_filehandle;
static struct fxp_xfer *scp_sftp_xfer;
static uint64 scp_sftp_fileoffset;
int scp_source_setup(char *target, int shouldbedir)
{
if (using_sftp) {
/*
* Find out whether the target filespec is in fact a
* directory.
*/
struct sftp_packet *pktin;
struct sftp_request *req;
struct fxp_attrs attrs;
int ret;
if (!fxp_init()) {
tell_user(stderr, "unable to initialise SFTP: %s", fxp_error());
errs++;
return 1;
}
req = fxp_stat_send(target);
pktin = sftp_wait_for_reply(req);
ret = fxp_stat_recv(pktin, req, &attrs);
if (!ret || !(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS))
scp_sftp_targetisdir = 0;
else
scp_sftp_targetisdir = (attrs.permissions & 0040000) != 0;
if (shouldbedir && !scp_sftp_targetisdir) {
bump("pscp: remote filespec %s: not a directory\n", target);
}
scp_sftp_remotepath = dupstr(target);
scp_has_times = 0;
} else {
(void) response();
}
return 0;
}
int scp_send_errmsg(char *str)
{
if (using_sftp) {
/* do nothing; we never need to send our errors to the server */
} else {
back->send(backhandle, "\001", 1);/* scp protocol error prefix */
back->send(backhandle, str, strlen(str));
}
return 0; /* can't fail */
}
int scp_send_filetimes(unsigned long mtime, unsigned long atime)
{
if (using_sftp) {
scp_sftp_mtime = mtime;
scp_sftp_atime = atime;
scp_has_times = 1;
return 0;
} else {
char buf[80];
sprintf(buf, "T%lu 0 %lu 0\n", mtime, atime);
back->send(backhandle, buf, strlen(buf));
return response();
}
}
int scp_send_filename(char *name, uint64 size, int permissions)
{
if (using_sftp) {
char *fullname;
struct sftp_packet *pktin;
struct sftp_request *req;
struct fxp_attrs attrs;
if (scp_sftp_targetisdir) {
fullname = dupcat(scp_sftp_remotepath, "/", name, NULL);
} else {
fullname = dupstr(scp_sftp_remotepath);
}
attrs.flags = 0;
PUT_PERMISSIONS(attrs, permissions);
req = fxp_open_send(fullname,
SSH_FXF_WRITE | SSH_FXF_CREAT | SSH_FXF_TRUNC,
&attrs);
pktin = sftp_wait_for_reply(req);
scp_sftp_filehandle = fxp_open_recv(pktin, req);
if (!scp_sftp_filehandle) {
tell_user(stderr, "pscp: unable to open %s: %s",
fullname, fxp_error());
sfree(fullname);
errs++;
return 1;
}
scp_sftp_fileoffset = uint64_make(0, 0);
scp_sftp_xfer = xfer_upload_init(scp_sftp_filehandle,
scp_sftp_fileoffset);
sfree(fullname);
return 0;
} else {
char buf[40];
char sizestr[40];
uint64_decimal(size, sizestr);
if (permissions < 0)
permissions = 0644;
sprintf(buf, "C%04o %s ", (int)(permissions & 07777), sizestr);
back->send(backhandle, buf, strlen(buf));
back->send(backhandle, name, strlen(name));
back->send(backhandle, "\n", 1);
return response();
}
}
int scp_send_filedata(char *data, int len)
{
if (using_sftp) {
int ret;
struct sftp_packet *pktin;
if (!scp_sftp_filehandle) {
return 1;
}
while (!xfer_upload_ready(scp_sftp_xfer)) {
pktin = sftp_recv();
ret = xfer_upload_gotpkt(scp_sftp_xfer, pktin);
if (ret <= 0) {
tell_user(stderr, "error while writing: %s", fxp_error());
if (ret == INT_MIN) /* pktin not even freed */
sfree(pktin);
errs++;
return 1;
}
}
xfer_upload_data(scp_sftp_xfer, data, len);
scp_sftp_fileoffset = uint64_add32(scp_sftp_fileoffset, len);
return 0;
} else {
int bufsize = back->send(backhandle, data, len);
/*
* If the network transfer is backing up - that is, the
* remote site is not accepting data as fast as we can
* produce it - then we must loop on network events until
* we have space in the buffer again.
*/
while (bufsize > MAX_SCP_BUFSIZE) {
if (ssh_sftp_loop_iteration() < 0)
return 1;
bufsize = back->sendbuffer(backhandle);
}
return 0;
}
}
int scp_send_finish(void)
{
if (using_sftp) {
struct fxp_attrs attrs;
struct sftp_packet *pktin;
struct sftp_request *req;
int ret;
while (!xfer_done(scp_sftp_xfer)) {
pktin = sftp_recv();
ret = xfer_upload_gotpkt(scp_sftp_xfer, pktin);
if (ret <= 0) {
tell_user(stderr, "error while writing: %s", fxp_error());
if (ret == INT_MIN) /* pktin not even freed */
sfree(pktin);
errs++;
return 1;
}
}
xfer_cleanup(scp_sftp_xfer);
if (!scp_sftp_filehandle) {
return 1;
}
if (scp_has_times) {
attrs.flags = SSH_FILEXFER_ATTR_ACMODTIME;
attrs.atime = scp_sftp_atime;
attrs.mtime = scp_sftp_mtime;
req = fxp_fsetstat_send(scp_sftp_filehandle, attrs);
pktin = sftp_wait_for_reply(req);
ret = fxp_fsetstat_recv(pktin, req);
if (!ret) {
tell_user(stderr, "unable to set file times: %s", fxp_error());
errs++;
}
}
req = fxp_close_send(scp_sftp_filehandle);
pktin = sftp_wait_for_reply(req);