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482 lines (428 loc) · 14.3 KB
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/*
* libcsync -- a library to sync a directory with another
*
* Copyright (c) 2011 by Andreas Schneider <asn@cryptomilk.org>
* Copyright (c) 2012 by Klaas Freitag <freitag@owncloud.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "csync_owncloud.h"
#include "csync_owncloud_private.h"
#include "csync_misc.h"
void set_error_message( csync_owncloud_ctx_t *ctx, const char *msg )
{
SAFE_FREE(ctx->dav_session.error_string);
if( msg )
ctx->dav_session.error_string = c_strdup(msg);
}
void set_errno_from_http_errcode( int err ) {
int new_errno = 0;
switch(err) {
case 200: /* OK */
case 201: /* Created */
case 202: /* Accepted */
case 203: /* Non-Authoritative Information */
case 204: /* No Content */
case 205: /* Reset Content */
case 207: /* Multi-Status */
case 304: /* Not Modified */
new_errno = 0;
break;
case 401: /* Unauthorized */
case 402: /* Payment Required */
case 407: /* Proxy Authentication Required */
case 405:
new_errno = EPERM;
break;
case 301: /* Moved Permanently */
case 303: /* See Other */
case 404: /* Not Found */
case 410: /* Gone */
new_errno = ENOENT;
break;
case 408: /* Request Timeout */
case 504: /* Gateway Timeout */
new_errno = EAGAIN;
break;
case 423: /* Locked */
new_errno = EACCES;
break;
case 400: /* Bad Request */
case 403: /* Forbidden */
case 409: /* Conflict */
case 411: /* Length Required */
case 412: /* Precondition Failed */
case 414: /* Request-URI Too Long */
case 415: /* Unsupported Media Type */
case 424: /* Failed Dependency */
case 501: /* Not Implemented */
new_errno = EINVAL;
break;
case 507: /* Insufficient Storage */
new_errno = ENOSPC;
break;
case 206: /* Partial Content */
case 300: /* Multiple Choices */
case 302: /* Found */
case 305: /* Use Proxy */
case 306: /* (Unused) */
case 307: /* Temporary Redirect */
case 406: /* Not Acceptable */
case 416: /* Requested Range Not Satisfiable */
case 417: /* Expectation Failed */
case 422: /* Unprocessable Entity */
case 500: /* Internal Server Error */
case 502: /* Bad Gateway */
case 505: /* HTTP Version Not Supported */
new_errno = EIO;
break;
case 503: /* Service Unavailable */
new_errno = ERRNO_SERVICE_UNAVAILABLE;
break;
case 413: /* Request Entity too Large */
new_errno = EFBIG;
break;
default:
new_errno = EIO;
}
errno = new_errno;
}
int http_result_code_from_session(csync_owncloud_ctx_t *ctx) {
const char *p = ne_get_error( ctx->dav_session.ctx );
char *q;
int err;
set_error_message(ctx, p); /* remember the error message */
err = strtol(p, &q, 10);
if (p == q) {
err = ERRNO_ERROR_STRING;
}
return err;
}
void set_errno_from_session(csync_owncloud_ctx_t *ctx) {
int err = http_result_code_from_session(ctx);
if( err == EIO || err == ERRNO_ERROR_STRING) {
errno = err;
} else {
set_errno_from_http_errcode(err);
}
}
void set_errno_from_neon_errcode(csync_owncloud_ctx_t *ctx, int neon_code ) {
if( neon_code != NE_OK ) {
DEBUG_WEBDAV("Neon error code was %d", neon_code);
}
switch(neon_code) {
case NE_OK: /* Success, but still the possiblity of problems */
case NE_ERROR: /* Generic error; use ne_get_error(session) for message */
set_errno_from_session(ctx); /* Something wrong with http communication */
break;
case NE_LOOKUP: /* Server or proxy hostname lookup failed */
errno = ERRNO_LOOKUP_ERROR;
break;
case NE_AUTH: /* User authentication failed on server */
errno = ERRNO_USER_UNKNOWN_ON_SERVER;
break;
case NE_PROXYAUTH: /* User authentication failed on proxy */
errno = ERRNO_PROXY_AUTH;
break;
case NE_CONNECT: /* Could not connect to server */
errno = ERRNO_CONNECT;
break;
case NE_TIMEOUT: /* Connection timed out */
errno = ERRNO_TIMEOUT;
break;
case NE_FAILED: /* The precondition failed */
errno = ERRNO_PRECONDITION;
break;
case NE_RETRY: /* Retry request (ne_end_request ONLY) */
errno = ERRNO_RETRY;
break;
case NE_REDIRECT: /* See ne_redirect.h */
errno = ERRNO_REDIRECT;
break;
default:
errno = ERRNO_GENERAL_ERROR;
}
}
/* cleanPath to return an escaped path of an uri */
char *_cleanPath( const char* uri ) {
int rc = 0;
char *path = NULL;
char *re = NULL;
rc = c_parse_uri( uri, NULL, NULL, NULL, NULL, NULL, &path );
if( rc < 0 ) {
DEBUG_WEBDAV("Unable to cleanPath %s", uri ? uri: "<zero>" );
re = NULL;
} else {
if(path) {
re = ne_path_escape( path );
}
}
SAFE_FREE( path );
return re;
}
#ifndef HAVE_TIMEGM
#ifdef _WIN32
static int is_leap(unsigned y) {
y += 1900;
return (y % 4) == 0 && ((y % 100) != 0 || (y % 400) == 0);
}
static time_t timegm(struct tm *tm) {
static const unsigned ndays[2][12] = {
{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31} };
time_t res = 0;
int i;
for (i = 70; i < tm->tm_year; ++i)
res += is_leap(i) ? 366 : 365;
for (i = 0; i < tm->tm_mon; ++i)
res += ndays[is_leap(tm->tm_year)][i];
res += tm->tm_mday - 1;
res *= 24;
res += tm->tm_hour;
res *= 60;
res += tm->tm_min;
res *= 60;
res += tm->tm_sec;
return res;
}
#else
/* A hopefully portable version of timegm */
static time_t timegm(struct tm *tm ) {
time_t ret;
char *tz;
tz = getenv("TZ");
setenv("TZ", "", 1);
tzset();
ret = mktime(tm);
if (tz)
setenv("TZ", tz, 1);
else
unsetenv("TZ");
tzset();
return ret;
}
#endif /* Platform switch */
#endif /* HAVE_TIMEGM */
#define RFC1123_FORMAT "%3s, %02d %3s %4d %02d:%02d:%02d GMT"
static const char short_months[12][4] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
/*
* This function is borrowed from libneon's ne_httpdate_parse.
* Unfortunately that one converts to local time but here UTC is
* needed.
* This one uses timegm instead, which returns UTC.
*/
time_t oc_httpdate_parse( const char *date ) {
struct tm gmt;
char wkday[4], mon[4];
int n;
time_t result = 0;
memset(&gmt, 0, sizeof(struct tm));
/* it goes: Sun, 06 Nov 1994 08:49:37 GMT */
n = sscanf(date, RFC1123_FORMAT,
wkday, &gmt.tm_mday, mon, &gmt.tm_year, &gmt.tm_hour,
&gmt.tm_min, &gmt.tm_sec);
/* Is it portable to check n==7 here? */
gmt.tm_year -= 1900;
for (n=0; n<12; n++)
if (strcmp(mon, short_months[n]) == 0)
break;
/* tm_mon comes out as 12 if the month is corrupt, which is desired,
* since the mktime will then fail */
gmt.tm_mon = n;
gmt.tm_isdst = -1;
result = timegm(&gmt);
return result;
}
/*
* helper: convert a resource struct to file_stat struct.
*/
void resourceToFileStat(csync_vio_file_stat_t *lfs, struct resource *res )
{
ZERO_STRUCTP(lfs);
lfs->name = c_strdup( res->name );
lfs->fields = CSYNC_VIO_FILE_STAT_FIELDS_NONE;
if( res->type == resr_normal ) {
lfs->fields |= CSYNC_VIO_FILE_STAT_FIELDS_TYPE;
lfs->type = CSYNC_VIO_FILE_TYPE_REGULAR;
} else if( res->type == resr_collection ) {
lfs->fields |= CSYNC_VIO_FILE_STAT_FIELDS_TYPE;
lfs->type = CSYNC_VIO_FILE_TYPE_DIRECTORY;
} else {
DEBUG_WEBDAV("ERROR: Unknown resource type %d", res->type);
}
lfs->mtime = res->modtime;
lfs->fields |= CSYNC_VIO_FILE_STAT_FIELDS_MTIME;
lfs->size = res->size;
lfs->fields |= CSYNC_VIO_FILE_STAT_FIELDS_SIZE;
if( res->md5 ) {
lfs->etag = c_strdup(res->md5);
lfs->fields |= CSYNC_VIO_FILE_STAT_FIELDS_ETAG;
}
csync_vio_file_stat_set_file_id(lfs, res->file_id);
if (res->directDownloadUrl) {
lfs->fields |= CSYNC_VIO_FILE_STAT_FIELDS_DIRECTDOWNLOADURL;
lfs->directDownloadUrl = c_strdup(res->directDownloadUrl);
}
if (res->directDownloadCookies) {
lfs->fields |= CSYNC_VIO_FILE_STAT_FIELDS_DIRECTDOWNLOADCOOKIES;
lfs->directDownloadCookies = c_strdup(res->directDownloadCookies);
}
if (strlen(res->remotePerm) > 0) {
lfs->fields |= CSYNC_VIO_FILE_STAT_FIELDS_PERM;
strncpy(lfs->remotePerm, res->remotePerm, sizeof(lfs->remotePerm));
}
}
void fill_webdav_properties_into_resource(struct resource* newres, const ne_prop_result_set *set)
{
const char *clength, *modtime, *file_id = NULL;
const char *directDownloadUrl = NULL;
const char *directDownloadCookies = NULL;
const char *resourcetype = NULL;
const char *etag = NULL;
const char *perm = NULL;
modtime = ne_propset_value( set, &ls_props[0] );
clength = ne_propset_value( set, &ls_props[1] );
resourcetype = ne_propset_value( set, &ls_props[2] );
etag = ne_propset_value( set, &ls_props[3] );
file_id = ne_propset_value( set, &ls_props[4] );
directDownloadUrl = ne_propset_value( set, &ls_props[5] );
directDownloadCookies = ne_propset_value( set, &ls_props[6] );
// permission flags: Defined in https://github.com/owncloud/core/issues/8322
perm = ne_propset_value( set, &ls_props[7] );
if( resourcetype && strncmp( resourcetype, "<DAV:collection>", 16 ) == 0) {
newres->type = resr_collection;
} else {
newres->type = resr_normal;
}
if (modtime) {
newres->modtime = oc_httpdate_parse(modtime);
}
/* DEBUG_WEBDAV("Parsing Modtime: %s -> %llu", modtime, (unsigned long long) newres->modtime ); */
newres->size = 0;
if (clength) {
newres->size = atoll(clength);
/* DEBUG_WEBDAV("Parsed File size for %s from %s: %lld", newres->name, clength, (long long)newres->size ); */
}
if( etag ) {
newres->md5 = csync_normalize_etag(etag);
}
csync_vio_set_file_id(newres->file_id, file_id);
/*
DEBUG_WEBDAV("propfind_results_recursive %s [%s] %s", newres->uri, newres->type == resr_collection ? "collection" : "file", newres->md5);
*/
if (directDownloadUrl) {
newres->directDownloadUrl = c_strdup(directDownloadUrl);
}
if (directDownloadCookies) {
newres->directDownloadCookies = c_strdup(directDownloadCookies);
}
if (perm && !perm[0]) {
// special meaning for our code: server returned permissions but are empty
// meaning only reading is allowed for this resource
newres->remotePerm[0] = ' ';
// see _csync_detect_update()
} else if (perm && strlen(perm) < sizeof(newres->remotePerm)) {
strncpy(newres->remotePerm, perm, sizeof(newres->remotePerm));
} else {
// old server, keep newres->remotePerm empty
}
}
struct resource* resource_dup(struct resource* o) {
struct resource *r = c_malloc (sizeof( struct resource ));
ZERO_STRUCTP(r);
r->uri = c_strdup(o->uri);
r->name = c_strdup(o->name);
r->type = o->type;
r->size = o->size;
r->modtime = o->modtime;
if( o->md5 ) {
r->md5 = c_strdup(o->md5);
}
if (o->directDownloadUrl) {
r->directDownloadUrl = c_strdup(o->directDownloadUrl);
}
if (o->directDownloadCookies) {
r->directDownloadCookies = c_strdup(o->directDownloadCookies);
}
if (o->remotePerm) {
strncpy(r->remotePerm, o->remotePerm, sizeof(r->remotePerm));
}
r->next = o->next;
csync_vio_set_file_id(r->file_id, o->file_id);
return r;
}
void resource_free(struct resource* o) {
struct resource* old = NULL;
while (o)
{
old = o;
o = o->next;
SAFE_FREE(old->uri);
SAFE_FREE(old->name);
SAFE_FREE(old->md5);
SAFE_FREE(old->directDownloadUrl);
SAFE_FREE(old->directDownloadCookies);
SAFE_FREE(old);
}
}
void free_fetchCtx( struct listdir_context *ctx )
{
struct resource *newres, *res;
if( ! ctx ) return;
newres = ctx->list;
res = newres;
ctx->ref--;
if (ctx->ref > 0) return;
SAFE_FREE(ctx->target);
while( res ) {
SAFE_FREE(res->uri);
SAFE_FREE(res->name);
SAFE_FREE(res->md5);
memset( res->file_id, 0, FILE_ID_BUF_SIZE+1 );
SAFE_FREE(res->directDownloadUrl);
SAFE_FREE(res->directDownloadCookies);
newres = res->next;
SAFE_FREE(res);
res = newres;
}
SAFE_FREE(ctx);
}
// as per http://sourceforge.net/p/predef/wiki/OperatingSystems/
// extend as required
const char* csync_owncloud_get_platform() {
#if defined (_WIN32)
return "Windows";
#elif defined(__APPLE__)
return "Macintosh";
#elif defined(__gnu_linux__)
return "Linux";
#elif defined(__DragonFly__)
/* might also define __FreeBSD__ */
return "DragonFlyBSD";
#elif defined(__FreeBSD__)
return "FreeBSD";
#elif defined(__NetBSD__)
return "NetBSD";
#elif defined(__OpenBSD__)
return "OpenBSD";
#elif defined(sun) || defined(__sun)
return "Solaris";
#else
return "Unknown OS";
#endif
}