ref: ef17043327d999101009f85aae72f77399db15ac
dir: /sys/src/cmd/ip/ftpfs/proto.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <ip.h>
#include <mp.h>
#include <libsec.h>
#include <auth.h>
#include <fcall.h>
#include <ctype.h>
#include <String.h>
#include "ftpfs.h"
enum
{
/* return codes */
Extra= 1,
Success= 2,
Incomplete= 3,
TempFail= 4,
PermFail= 5,
Impossible= 6,
};
Node *remdir; /* current directory on remote machine */
Node *remroot; /* root directory on remote machine */
int ctlfd; /* fd for control connection */
Biobuf ctlin; /* input buffer for control connection */
Biobuf stdin; /* input buffer for standard input */
Biobuf dbuf; /* buffer for data connection */
char msg[512]; /* buffer for replies */
char net[Maxpath]; /* network for connections */
int listenfd; /* fd to listen on for connections */
char netdir[Maxpath];
int os, defos;
char topsdir[64]; /* name of listed directory for TOPS */
String *remrootpath; /* path on remote side to remote root */
char *user;
int nopassive;
long lastsend;
extern int usetls;
static void sendrequest(char*, char*);
static int getreply(Biobuf*, char*, int, int);
static int active(int, Biobuf**, char*, char*);
static int passive(int, Biobuf**, char*, char*);
static int data(int, Biobuf**, char*, char*);
static int port(void);
static void ascii(void);
static void image(void);
static void unixpath(Node*, String*);
static void vmspath(Node*, String*);
static void mvspath(Node*, String*);
static Node* vmsdir(char*);
static int getpassword(char*, char*);
static int nw_mode(char dirlet, char *s);
static void
starttls(int *fd)
{
TLSconn conn;
memset(&conn, 0, sizeof(conn));
if((*fd = tlsClient(*fd, &conn)) < 0)
fatal("starting tls: %r");
free(conn.cert);
free(conn.sessionID);
}
/*
* connect to remote server, default network is "tcp/ip"
*/
void
hello(char *dest)
{
char *p;
char dir[Maxpath];
Binit(&stdin, 0, OREAD); /* init for later use */
ctlfd = dial(netmkaddr(dest, "tcp", "ftp"), 0, dir, 0);
if(ctlfd < 0){
fprint(2, "can't dial %s: %r\n", dest);
exits("dialing");
}
Binit(&ctlin, ctlfd, OREAD);
/* remember network for the data connections */
p = strrchr(dir+1, '/');
if(p == 0)
fatal("wrong dial(2) linked with ftp");
*p = 0;
safecpy(net, dir, sizeof(net));
/* wait for hello from other side */
if(getreply(&ctlin, msg, sizeof(msg), 1) != Success)
fatal("bad hello");
if(strstr(msg, "Plan 9"))
os = Plan9;
if(usetls){
sendrequest("AUTH", "TLS");
if(getreply(&ctlin, msg, sizeof(msg), 1) != Success)
fatal("bad auth tls");
starttls(&ctlfd);
Binit(&ctlin, ctlfd, OREAD);
sendrequest("PBSZ", "0");
if(getreply(&ctlin, msg, sizeof(msg), 1) != Success)
fatal("bad pbsz 0");
sendrequest("PROT", "P");
if(getreply(&ctlin, msg, sizeof(msg), 1) != Success)
fatal("bad prot p");
}
}
/*
* login to remote system
*/
void
rlogin(char *rsys, char *keyspec)
{
char *line;
char pass[128];
UserPasswd *up;
up = nil;
for(;;){
if(up == nil && os != Plan9)
up = auth_getuserpasswd(auth_getkey, "proto=pass server=%s service=ftp %s", rsys, keyspec);
if(up != nil){
sendrequest("USER", up->user);
} else {
print("User[default = %s]: ", user);
line = Brdline(&stdin, '\n');
if(line == 0)
exits(0);
line[Blinelen(&stdin)-1] = 0;
if(*line){
free(user);
user = strdup(line);
}
sendrequest("USER", user);
}
switch(getreply(&ctlin, msg, sizeof(msg), 1)){
case Success:
goto out;
case Incomplete:
break;
case TempFail:
case PermFail:
continue;
}
if(up != nil){
sendrequest("PASS", up->passwd);
} else {
if(getpassword(pass, pass+sizeof(pass)) < 0)
exits(0);
sendrequest("PASS", pass);
}
if(getreply(&ctlin, msg, sizeof(msg), 1) == Success){
if(strstr(msg, "Sess#"))
defos = MVS;
break;
}
}
out:
if(up != nil){
memset(up, 0, sizeof(*up));
free(up);
}
}
/*
* login to remote system with given user name and password.
*/
void
clogin(char *cuser, char *cpassword)
{
free(user);
user = strdup(cuser);
if (strcmp(user, "anonymous") != 0 &&
strcmp(user, "ftp") != 0)
fatal("User must be 'anonymous' or 'ftp'");
sendrequest("USER", user);
switch(getreply(&ctlin, msg, sizeof(msg), 1)){
case Success:
return;
case Incomplete:
break;
case TempFail:
case PermFail:
fatal("login failed");
}
if (cpassword == 0)
fatal("password needed");
sendrequest("PASS", cpassword);
if(getreply(&ctlin, msg, sizeof(msg), 1) != Success)
fatal("password failed");
if(strstr(msg, "Sess#"))
defos = MVS;
return;
}
/*
* find out about the other side. go to it's root if requested. set
* image mode if a Plan9 system.
*/
void
preamble(char *mountroot)
{
char *p, *ep;
int rv;
OS *o;
/*
* create a root directory mirror
*/
remroot = newnode(0, s_copy("/"));
remroot->d->qid.type = QTDIR;
remroot->d->mode = DMDIR|0777;
remdir = remroot;
/*
* get system type
*/
sendrequest("SYST", nil);
switch(getreply(&ctlin, msg, sizeof(msg), 1)){
case Success:
for(o = oslist; o->os != Unknown; o++)
if(strncmp(msg+4, o->name, strlen(o->name)) == 0)
break;
os = o->os;
if(os == NT)
os = Unix;
break;
default:
os = defos;
break;
}
if(os == Unknown)
os = defos;
remrootpath = s_reset(remrootpath);
switch(os){
case NetWare:
/*
* Request long, rather than 8.3 filenames,
* where the Servers & Volume support them.
*/
sendrequest("SITE LONG", nil);
getreply(&ctlin, msg, sizeof(msg), 0);
/* FALL THRU */
case Unix:
case Plan9:
/*
* go to the remote root, if asked
*/
if(mountroot){
sendrequest("CWD", mountroot);
getreply(&ctlin, msg, sizeof(msg), 0);
} else {
s_append(remrootpath, "/usr/");
s_append(remrootpath, user);
}
/*
* get the root directory
*/
sendrequest("PWD", nil);
rv = getreply(&ctlin, msg, sizeof(msg), 1);
if(rv == PermFail){
sendrequest("XPWD", nil);
rv = getreply(&ctlin, msg, sizeof(msg), 1);
}
if(rv == Success){
p = strchr(msg, '"');
if(p){
p++;
ep = strchr(p, '"');
if(ep){
*ep = 0;
s_append(s_reset(remrootpath), p);
}
}
}
break;
case Tops:
case VM:
/*
* top directory is a figment of our imagination.
* make it permanently cached & valid.
*/
CACHED(remroot);
VALID(remroot);
remroot->d->atime = time(0) + 100000;
/*
* no initial directory. We are in the
* imaginary root.
*/
remdir = newtopsdir("???");
topsdir[0] = 0;
if(os == Tops && readdir(remdir) >= 0){
CACHED(remdir);
if(*topsdir)
remdir->remname = s_copy(topsdir);
VALID(remdir);
}
break;
case VMS:
/*
* top directory is a figment of our imagination.
* make it permanently cached & valid.
*/
CACHED(remroot);
VALID(remroot);
remroot->d->atime = time(0) + 100000;
/*
* get current directory
*/
sendrequest("PWD", nil);
rv = getreply(&ctlin, msg, sizeof(msg), 1);
if(rv == PermFail){
sendrequest("XPWD", nil);
rv = getreply(&ctlin, msg, sizeof(msg), 1);
}
if(rv == Success){
p = strchr(msg, '"');
if(p){
p++;
ep = strchr(p, '"');
if(ep){
*ep = 0;
remroot = remdir = vmsdir(p);
}
}
}
break;
case MVS:
usenlst = 1;
break;
}
if(os == Plan9)
image();
}
static void
ascii(void)
{
sendrequest("TYPE A", nil);
switch(getreply(&ctlin, msg, sizeof(msg), 0)){
case Success:
break;
default:
fatal("can't set type to ascii");
}
}
static void
image(void)
{
sendrequest("TYPE I", nil);
switch(getreply(&ctlin, msg, sizeof(msg), 0)){
case Success:
break;
default:
fatal("can't set type to image/binary");
}
}
/*
* decode the time fields, return seconds since epoch began
*/
char *monthchars = "janfebmaraprmayjunjulaugsepoctnovdec";
static Tm now;
static ulong
cracktime(char *month, char *day, char *yr, char *hms)
{
Tm tm;
int i;
char *p;
/* default time */
if(now.year == 0)
now = *localtime(time(0));
tm = now;
tm.yday = 0;
/* convert ascii month to a number twixt 1 and 12 */
if(*month >= '0' && *month <= '9'){
tm.mon = atoi(month) - 1;
if(tm.mon < 0 || tm.mon > 11)
tm.mon = 5;
} else {
for(p = month; *p; p++)
*p = tolower(*p);
for(i = 0; i < 12; i++)
if(strncmp(&monthchars[i*3], month, 3) == 0){
tm.mon = i;
break;
}
}
tm.mday = atoi(day);
if(hms){
tm.hour = strtol(hms, &p, 0);
if(*p == ':'){
tm.min = strtol(p+1, &p, 0);
if(*p == ':')
tm.sec = strtol(p+1, &p, 0);
}
if(tolower(*p) == 'p')
tm.hour += 12;
}
if(yr){
tm.year = atoi(yr);
if(tm.year >= 1900)
tm.year -= 1900;
} else {
if(tm.mon > now.mon || (tm.mon == now.mon && tm.mday > now.mday+1))
tm.year--;
}
/* convert to epoch seconds */
return tm2sec(&tm);
}
/*
* decode a Unix or Plan 9 file mode
*/
static ulong
crackmode(char *p)
{
ulong flags;
ulong mode;
int i;
flags = 0;
switch(strlen(p)){
case 10: /* unix and new style plan 9 */
switch(*p){
case 'l':
return DMSYML|0777;
case 'd':
flags |= DMDIR;
case 'a':
flags |= DMAPPEND;
}
p++;
if(p[2] == 'l')
flags |= DMEXCL;
break;
case 11: /* old style plan 9 */
switch(*p++){
case 'd':
flags |= DMDIR;
break;
case 'a':
flags |= DMAPPEND;
break;
}
if(*p++ == 'l')
flags |= DMEXCL;
break;
default:
return DMDIR|0777;
}
mode = 0;
for(i = 0; i < 3; i++){
mode <<= 3;
if(*p++ == 'r')
mode |= DMREAD;
if(*p++ == 'w')
mode |= DMWRITE;
if(*p == 'x' || *p == 's' || *p == 'S')
mode |= DMEXEC;
p++;
}
return mode | flags;
}
/*
* find first punctuation
*/
char*
strpunct(char *p)
{
int c;
for(;c = *p; p++){
if(ispunct(c))
return p;
}
return 0;
}
/*
* decode a Unix or Plan 9 directory listing
*/
static Dir*
crackdir(char *p, String **remname, int nlst)
{
char *field[15];
char *dfield[4];
char *cp;
String *s;
int dn, n;
Dir d, *dp;
memset(&d, 0, sizeof(d));
if(nlst != 0){
field[0] = p;
n = 1;
} else {
n = getfields(p, field, 15, 1, " \t");
if(n > 2 && strcmp(field[n-2], "->") == 0)
n -= 2;
}
switch(os){
case TSO:
cp = strchr(field[0], '.');
if(cp){
*cp++ = 0;
s = s_copy(cp);
d.uid = field[0];
} else {
s = s_copy(field[0]);
d.uid = "TSO";
}
d.gid = "TSO";
d.mode = 0666;
d.length = 0;
d.atime = 0;
break;
case OS½:
s = s_copy(field[n-1]);
d.uid = "OS½";
d.gid = d.uid;
d.mode = 0666;
switch(n){
case 5:
if(strcmp(field[1], "DIR") == 0)
d.mode |= DMDIR;
d.length = atoll(field[0]);
dn = getfields(field[2], dfield, 4, 1, "-");
if(dn == 3)
d.atime = cracktime(dfield[0], dfield[1], dfield[2], field[3]);
break;
}
break;
case Tops:
if(n != 4){ /* tops directory name */
safecpy(topsdir, field[0], sizeof(topsdir));
return 0;
}
s = s_copy(field[3]);
d.length = atoll(field[0]);
d.mode = 0666;
d.uid = "Tops";
d.gid = d.uid;
dn = getfields(field[1], dfield, 4, 1, "-");
if(dn == 3)
d.atime = cracktime(dfield[1], dfield[0], dfield[2], field[2]);
else
d.atime = time(0);
break;
case VM:
switch(n){
case 9:
s = s_copy(field[0]);
s_append(s, ".");
s_append(s, field[1]);
d.length = atoll(field[3]) * atoll(field[4]);
if(*field[2] == 'F')
d.mode = 0666;
else
d.mode = 0777;
d.uid = "VM";
d.gid = d.uid;
dn = getfields(field[6], dfield, 4, 1, "/-");
if(dn == 3)
d.atime = cracktime(dfield[0], dfield[1], dfield[2], field[7]);
else
d.atime = time(0);
break;
case 1:
s = s_copy(field[0]);
d.uid = "VM";
d.gid = d.uid;
d.mode = 0777;
d.atime = 0;
break;
default:
return nil;
}
break;
case VMS:
switch(n){
case 6:
for(cp = field[0]; *cp; cp++)
*cp = tolower(*cp);
cp = strchr(field[0], ';');
if(cp)
*cp = 0;
d.mode = 0666;
cp = field[0] + strlen(field[0]) - 4;
if(strcmp(cp, ".dir") == 0){
d.mode |= DMDIR;
*cp = 0;
}
s = s_copy(field[0]);
d.length = atoll(field[1]) * 512;
field[4][strlen(field[4])-1] = 0;
d.uid = field[4]+1;
d.gid = d.uid;
dn = getfields(field[2], dfield, 4, 1, "/-");
if(dn == 3)
d.atime = cracktime(dfield[1], dfield[0], dfield[2], field[3]);
else
d.atime = time(0);
break;
default:
return nil;
}
break;
case NetWare:
switch(n){
case 8: /* New style */
s = s_copy(field[7]);
d.uid = field[2];
d.gid = d.uid;
d.mode = nw_mode(field[0][0], field[1]);
d.length = atoll(field[3]);
if(strchr(field[6], ':'))
d.atime = cracktime(field[4], field[5], nil, field[6]);
else
d.atime = cracktime(field[4], field[5], field[6], nil);
break;
case 9:
s = s_copy(field[8]);
d.uid = field[2];
d.gid = d.uid;
d.mode = 0666;
if(*field[0] == 'd')
d.mode |= DMDIR;
d.length = atoll(field[3]);
d.atime = cracktime(field[4], field[5], field[6], field[7]);
break;
case 1:
s = s_copy(field[0]);
d.uid = "none";
d.gid = d.uid;
d.mode = 0777;
d.atime = 0;
break;
default:
return nil;
}
break;
case Unix:
case Plan9:
default:
switch(n){
case 8: /* ls -lg */
s = s_copy(field[7]);
d.uid = field[2];
d.gid = d.uid;
d.mode = crackmode(field[0]);
d.length = atoll(field[3]);
if(strchr(field[6], ':'))
d.atime = cracktime(field[4], field[5], 0, field[6]);
else
d.atime = cracktime(field[4], field[5], field[6], 0);
break;
case 9: /* ls -l */
s = s_copy(field[8]);
d.uid = field[2];
d.gid = field[3];
d.mode = crackmode(field[0]);
d.length = atoll(field[4]);
if(strchr(field[7], ':'))
d.atime = cracktime(field[5], field[6], 0, field[7]);
else
d.atime = cracktime(field[5], field[6], field[7], 0);
break;
case 10: /* plan 9 */
s = s_copy(field[9]);
d.uid = field[3];
d.gid = field[4];
d.mode = crackmode(field[0]);
d.length = atoll(field[5]);
if(strchr(field[8], ':'))
d.atime = cracktime(field[6], field[7], 0, field[8]);
else
d.atime = cracktime(field[6], field[7], field[8], 0);
break;
case 4: /* a Windows_NT version */
s = s_copy(field[3]);
d.uid = "NT";
d.gid = d.uid;
if(strcmp("<DIR>", field[2]) == 0){
d.length = 0;
d.mode = DMDIR|0777;
} else {
d.mode = 0666;
d.length = atoll(field[2]);
}
dn = getfields(field[0], dfield, 4, 1, "/-");
if(dn == 3)
d.atime = cracktime(dfield[0], dfield[1], dfield[2], field[1]);
break;
case 1:
s = s_copy(field[0]);
d.uid = "none";
d.gid = d.uid;
d.mode = 0777;
d.atime = 0;
break;
default:
return nil;
}
}
d.muid = d.uid;
d.qid.type = (d.mode & DMDIR) ? QTDIR : QTFILE;
d.mtime = d.atime;
if(ext && (d.qid.type & QTDIR) == 0)
s_append(s, ext);
d.name = s_to_c(s);
/* allocate a freeable dir structure */
dp = reallocdir(&d, 0);
*remname = s;
return dp;
}
/*
* probe files in a directory to see if they are directories
*/
/*
* read a remote directory
*/
int
readdir(Node *node)
{
Biobuf *bp;
char *line;
Node *np;
Dir *d;
long n;
int tries, x, files;
static int uselist;
int usenlist;
String *remname;
if(changedir(node) < 0)
return -1;
usenlist = 0;
for(tries = 0; tries < 3; tries++){
if(usenlist || usenlst)
x = data(OREAD, &bp, "NLST", nil);
else if(os == Unix && !uselist)
x = data(OREAD, &bp, "LIST -l", nil);
else
x = data(OREAD, &bp, "LIST", nil);
switch(x){
case Extra:
break;
/* case TempFail:
continue;
*/
default:
if(os == Unix && uselist == 0){
uselist = 1;
continue;
}
return seterr(nosuchfile);
}
files = 0;
while(line = Brdline(bp, '\n')){
n = Blinelen(bp);
if(debug)
write(2, line, n);
if(n > 1 && line[n-2] == '\r')
n--;
line[n - 1] = 0;
d = crackdir(line, &remname, (usenlist || usenlst));
if(d == nil)
continue;
files++;
np = extendpath(node, remname);
d->qid.path = np->d->qid.path;
d->qid.vers = np->d->qid.vers;
d->type = np->d->type;
d->dev = 1; /* mark node as valid */
if(os == MVS && node == remroot){
d->qid.type = QTDIR;
d->mode |= DMDIR;
}
free(np->d);
np->d = d;
}
close(Bfildes(bp));
switch(getreply(&ctlin, msg, sizeof(msg), 0)){
case Success:
if(files == 0 && !usenlst && !usenlist){
usenlist = 1;
continue;
}
if(files && usenlist)
usenlst = 1;
if(usenlst)
node->chdirunknown = 1;
return 0;
case TempFail:
break;
default:
return seterr(nosuchfile);
}
}
return seterr(nosuchfile);
}
/*
* create a remote directory
*/
int
createdir(Node *node)
{
if(changedir(node->parent) < 0)
return -1;
sendrequest("MKD", node->d->name);
if(getreply(&ctlin, msg, sizeof(msg), 0) != Success)
return -1;
return 0;
}
/*
* change to a remote directory.
*/
int
changedir(Node *node)
{
Node *to;
String *cdpath;
to = node;
if(to == remdir)
return 0;
/* build an absolute path */
switch(os){
case Tops:
case VM:
switch(node->depth){
case 0:
remdir = node;
return 0;
case 1:
cdpath = s_clone(node->remname);
break;
default:
return seterr(nosuchfile);
}
break;
case VMS:
switch(node->depth){
case 0:
remdir = node;
return 0;
default:
cdpath = s_new();
vmspath(node, cdpath);
}
break;
case MVS:
if(node->depth == 0)
cdpath = s_clone(remrootpath);
else{
cdpath = s_new();
mvspath(node, cdpath);
}
break;
default:
if(node->depth == 0)
cdpath = s_clone(remrootpath);
else{
cdpath = s_new();
unixpath(node, cdpath);
}
break;
}
uncachedir(remdir, 0);
/*
* connect, if we need a password (Incomplete)
* act like it worked (best we can do).
*/
sendrequest("CWD", s_to_c(cdpath));
s_free(cdpath);
switch(getreply(&ctlin, msg, sizeof(msg), 0)){
case Success:
case Incomplete:
remdir = node;
return 0;
default:
return seterr(nosuchfile);
}
}
/*
* read a remote file
*/
int
readfile1(Node *node)
{
Biobuf *bp;
char buf[4*1024];
long off;
int n;
int tries;
if(changedir(node->parent) < 0)
return -1;
for(tries = 0; tries < 4; tries++){
switch(data(OREAD, &bp, "RETR", s_to_c(node->remname))){
case Extra:
break;
case TempFail:
continue;
default:
return seterr(nosuchfile);
}
off = 0;
while((n = read(Bfildes(bp), buf, sizeof buf)) > 0){
if(filewrite(node, buf, off, n) != n){
off = -1;
break;
}
off += n;
}
if(off < 0)
return -1;
/* make sure a file gets created even for a zero length file */
if(off == 0)
filewrite(node, buf, 0, 0);
close(Bfildes(bp));
switch(getreply(&ctlin, msg, sizeof(msg), 0)){
case Success:
return off;
case TempFail:
continue;
default:
return seterr(nosuchfile);
}
}
return seterr(nosuchfile);
}
int
readfile(Node *node)
{
int rv, inimage;
switch(os){
case MVS:
case Plan9:
case Tops:
case TSO:
inimage = 0;
break;
default:
inimage = 1;
image();
break;
}
rv = readfile1(node);
if(inimage)
ascii();
return rv;
}
/*
* write back a file
*/
int
createfile1(Node *node)
{
Biobuf *bp;
char buf[4*1024];
long off;
int n;
if(changedir(node->parent) < 0)
return -1;
if(data(OWRITE, &bp, "STOR", s_to_c(node->remname)) != Extra)
return -1;
for(off = 0; ; off += n){
n = fileread(node, buf, off, sizeof(buf));
if(n <= 0)
break;
write(Bfildes(bp), buf, n);
}
close(Bfildes(bp));
if(getreply(&ctlin, msg, sizeof(msg), 0) != Success)
return -1;
return off;
}
int
createfile(Node *node)
{
int rv;
switch(os){
case Plan9:
case Tops:
break;
default:
image();
break;
}
rv = createfile1(node);
switch(os){
case Plan9:
case Tops:
break;
default:
ascii();
break;
}
return rv;
}
/*
* remove a remote file
*/
int
removefile(Node *node)
{
if(changedir(node->parent) < 0)
return -1;
sendrequest("DELE", s_to_c(node->remname));
if(getreply(&ctlin, msg, sizeof(msg), 0) != Success)
return -1;
return 0;
}
/*
* remove a remote directory
*/
int
removedir(Node *node)
{
if(changedir(node->parent) < 0)
return -1;
sendrequest("RMD", s_to_c(node->remname));
if(getreply(&ctlin, msg, sizeof(msg), 0) != Success)
return -1;
return 0;
}
/*
* tell remote that we're exiting and then do it
*/
void
quit(void)
{
sendrequest("QUIT", nil);
getreply(&ctlin, msg, sizeof(msg), 0);
exits(0);
}
/*
* send a request
*/
static void
sendrequest(char *a, char *b)
{
char buf[2*1024];
int n;
n = strlen(a)+2+1;
if(b != nil)
n += strlen(b)+1;
if(n >= sizeof(buf))
fatal("proto request too long");
strcpy(buf, a);
if(b != nil){
strcat(buf, " ");
strcat(buf, b);
}
strcat(buf, "\r\n");
n = strlen(buf);
if(write(ctlfd, buf, n) != n)
fatal("remote side hung up");
if(debug)
write(2, buf, n);
lastsend = time(0);
}
/*
* replies codes are in the range [100, 999] and may contain multiple lines of
* continuation.
*/
static int
getreply(Biobuf *bp, char *msg, int len, int printreply)
{
char *line;
char *p;
int rv;
int i, n;
while(line = Brdline(bp, '\n')){
/* add line to message buffer, strip off \r */
n = Blinelen(bp);
if(n > 1 && line[n-2] == '\r'){
n--;
line[n-1] = '\n';
}
if(printreply && !quiet)
write(1, line, n);
else if(debug)
write(2, line, n);
if(n > len - 1)
i = len - 1;
else
i = n;
if(i > 0){
memmove(msg, line, i);
msg += i;
len -= i;
*msg = 0;
}
/* stop if not a continuation */
rv = strtol(line, &p, 10);
if(rv >= 100 && rv < 600 && p==line+3 && *p != '-')
return rv/100;
/* tell user about continuations */
if(!debug && !quiet && !printreply)
write(2, line, n);
}
fatal("remote side closed connection");
return 0;
}
/*
* Announce on a local port and tell its address to the the remote side
*/
static int
port(void)
{
char buf[256];
int n, fd;
char *ptr;
uchar ipaddr[IPaddrlen];
int port;
/* get a channel to listen on, let kernel pick the port number */
sprint(buf, "%s!*!0", net);
listenfd = announce(buf, netdir);
if(listenfd < 0)
return seterr("can't announce");
/* get the local address and port number */
sprint(buf, "%s/local", netdir);
fd = open(buf, OREAD);
if(fd < 0)
return seterr("opening %s: %r", buf);
n = read(fd, buf, sizeof(buf)-1);
close(fd);
if(n <= 0)
return seterr("opening %s/local: %r", netdir);
buf[n] = 0;
ptr = strchr(buf, ' ');
if(ptr)
*ptr = 0;
ptr = strchr(buf, '!')+1;
port = atoi(ptr);
memset(ipaddr, 0, IPaddrlen);
if (*net){
strcpy(buf, net);
ptr = strchr(buf +1, '/');
if (ptr)
*ptr = 0;
myipaddr(ipaddr, buf);
}
/* tell remote side */
sprint(buf, "PORT %d,%d,%d,%d,%d,%d", ipaddr[IPv4off+0], ipaddr[IPv4off+1],
ipaddr[IPv4off+2], ipaddr[IPv4off+3], port>>8, port&0xff);
sendrequest(buf, nil);
if(getreply(&ctlin, msg, sizeof(msg), 0) != Success)
return seterr(msg);
return 0;
}
/*
* have server call back for a data connection
*/
static int
active(int mode, Biobuf **bpp, char *cmda, char *cmdb)
{
int cfd, dfd, rv;
char newdir[Maxpath];
char datafile[Maxpath + 6];
if(port() < 0)
return TempFail;
sendrequest(cmda, cmdb);
rv = getreply(&ctlin, msg, sizeof(msg), 0);
if(rv != Extra){
close(listenfd);
return rv;
}
/* wait for a new call */
cfd = listen(netdir, newdir);
if(cfd < 0)
fatal("waiting for data connection");
close(listenfd);
/* open it's data connection and close the control connection */
sprint(datafile, "%s/data", newdir);
dfd = open(datafile, ORDWR);
close(cfd);
if(dfd < 0)
fatal("opening data connection");
if(usetls)
starttls(&dfd);
Binit(&dbuf, dfd, mode);
*bpp = &dbuf;
return Extra;
}
/*
* call out for a data connection
*/
static int
passive(int mode, Biobuf **bpp, char *cmda, char *cmdb)
{
char msg[1024];
char ds[1024];
char *f[6];
char *p;
int x, fd;
if(nopassive)
return Impossible;
sendrequest("PASV", nil);
if(getreply(&ctlin, msg, sizeof(msg), 0) != Success){
nopassive = 1;
return Impossible;
}
/* get address and port number from reply, this is AI */
p = strchr(msg, '(');
if(p == 0){
for(p = msg+3; *p; p++)
if(isdigit(*p))
break;
} else
p++;
if(getfields(p, f, 6, 0, ",") < 6){
if(debug)
fprint(2, "passive mode protocol botch: %s\n", msg);
werrstr("ftp protocol botch");
nopassive = 1;
return Impossible;
}
snprint(ds, sizeof(ds), "%s!%s.%s.%s.%s!%d", net,
f[0], f[1], f[2], f[3],
((atoi(f[4])&0xff)<<8) + (atoi(f[5])&0xff));
/* open data connection */
fd = dial(ds, 0, 0, 0);
if(fd < 0){
if(debug)
fprint(2, "passive mode connect to %s failed: %r\n", ds);
nopassive = 1;
return TempFail;
}
/* tell remote to send a file */
sendrequest(cmda, cmdb);
x = getreply(&ctlin, msg, sizeof(msg), 0);
if(x != Extra){
close(fd);
if(debug)
fprint(2, "passive mode retrieve failed: %s\n", msg);
werrstr("%s", msg);
return x;
}
if(usetls)
starttls(&fd);
Binit(&dbuf, fd, mode);
*bpp = &dbuf;
return Extra;
}
static int
data(int mode, Biobuf **bpp, char* cmda, char *cmdb)
{
int x;
x = passive(mode, bpp, cmda, cmdb);
if(x != Impossible)
return x;
return active(mode, bpp, cmda, cmdb);
}
/*
* used for keep alives
*/
void
nop(void)
{
if(lastsend - time(0) < 15)
return;
sendrequest("PWD", nil);
getreply(&ctlin, msg, sizeof(msg), 0);
}
/*
* turn a vms spec into a path
*/
static Node*
vmsextendpath(Node *np, char *name)
{
np = extendpath(np, s_copy(name));
if(!ISVALID(np)){
np->d->qid.type = QTDIR;
np->d->atime = time(0);
np->d->mtime = np->d->atime;
strcpy(np->d->uid, "who");
strcpy(np->d->gid, "cares");
np->d->mode = DMDIR|0777;
np->d->length = 0;
if(changedir(np) >= 0)
VALID(np);
}
return np;
}
static Node*
vmsdir(char *name)
{
char *cp;
Node *np;
char *oname;
np = remroot;
cp = strchr(name, '[');
if(cp)
strcpy(cp, cp+1);
cp = strchr(name, ']');
if(cp)
*cp = 0;
oname = name = strdup(name);
if(name == 0)
return 0;
while(cp = strchr(name, '.')){
*cp = 0;
np = vmsextendpath(np, name);
name = cp+1;
}
np = vmsextendpath(np, name);
/*
* walk back to first accessible directory
*/
for(; np->parent != np; np = np->parent)
if(ISVALID(np)){
CACHED(np->parent);
break;
}
free(oname);
return np;
}
/*
* walk up the tree building a VMS style path
*/
static void
vmspath(Node *node, String *path)
{
char *p;
int n;
if(node->depth == 1){
p = strchr(s_to_c(node->remname), ':');
if(p){
n = p - s_to_c(node->remname) + 1;
s_nappend(path, s_to_c(node->remname), n);
s_append(path, "[");
s_append(path, p+1);
} else {
s_append(path, "[");
s_append(path, s_to_c(node->remname));
}
s_append(path, "]");
return;
}
vmspath(node->parent, path);
s_append(path, ".");
s_append(path, s_to_c(node->remname));
}
/*
* walk up the tree building a Unix style path
*/
static void
unixpath(Node *node, String *path)
{
if(node == node->parent){
s_append(path, s_to_c(remrootpath));
return;
}
unixpath(node->parent, path);
if(s_len(path) > 0 && strcmp(s_to_c(path), "/") != 0)
s_append(path, "/");
s_append(path, s_to_c(node->remname));
}
/*
* walk up the tree building a MVS style path
*/
static void
mvspath(Node *node, String *path)
{
if(node == node->parent){
s_append(path, s_to_c(remrootpath));
return;
}
mvspath(node->parent, path);
if(s_len(path) > 0)
s_append(path, ".");
s_append(path, s_to_c(node->remname));
}
static int
getpassword(char *buf, char *e)
{
char *p;
int c;
int consctl, rv = 0;
consctl = open("/dev/consctl", OWRITE);
if(consctl >= 0)
write(consctl, "rawon", 5);
print("Password: ");
e--;
for(p = buf; p <= e; p++){
c = Bgetc(&stdin);
if(c < 0){
rv = -1;
goto out;
}
if(c == '\n' || c == '\r')
break;
*p = c;
}
*p = 0;
print("\n");
out:
if(consctl >= 0)
close(consctl);
return rv;
}
/*
* convert from latin1 to utf
*/
static char*
fromlatin1(char *from)
{
char *p, *to;
Rune r;
int n;
if(os == Plan9)
return nil;
/* don't convert if we don't have to */
for(p = from; *p; p += n){
n = chartorune(&r, p);
if(r == Runeerror)
break;
}
if(*p == 0)
return nil;
to = malloc(UTFmax*strlen(from)+2);
if(to == nil)
return nil;
for(p = to; *from; from++){
r = (*from) & 0xff;
p += runetochar(p, &r);
}
*p = 0;
return to;
}
Dir*
reallocdir(Dir *d, int dofree)
{
Dir *dp;
char *p;
int nn, ng, nu, nm;
char *utf;
if(d->name == nil)
d->name = "?name?";
if(d->uid == nil)
d->uid = "?uid?";
if(d->gid == nil)
d->gid = d->uid;
if(d->muid == nil)
d->muid = d->uid;
utf = fromlatin1(d->name);
if(utf != nil)
d->name = utf;
nn = strlen(d->name)+1;
nu = strlen(d->uid)+1;
ng = strlen(d->gid)+1;
nm = strlen(d->muid)+1;
dp = malloc(sizeof(Dir)+nn+nu+ng+nm);
if(dp == nil){
if(dofree)
free(d);
if(utf != nil)
free(utf);
return nil;
}
*dp = *d;
p = (char*)&dp[1];
strcpy(p, d->name);
dp->name = p;
p += nn;
strcpy(p, d->uid);
dp->uid = p;
p += nu;
strcpy(p, d->gid);
dp->gid = p;
p += ng;
strcpy(p, d->muid);
dp->muid = p;
if(dofree)
free(d);
if(utf != nil)
free(utf);
return dp;
}
Dir*
dir_change_name(Dir *d, char *name)
{
if(d->name && strlen(d->name) >= strlen(name)){
strcpy(d->name, name);
return d;
}
d->name = name;
return reallocdir(d, 1);
}
Dir*
dir_change_uid(Dir *d, char *name)
{
if(d->uid && strlen(d->uid) >= strlen(name)){
strcpy(d->name, name);
return d;
}
d->uid = name;
return reallocdir(d, 1);
}
Dir*
dir_change_gid(Dir *d, char *name)
{
if(d->gid && strlen(d->gid) >= strlen(name)){
strcpy(d->name, name);
return d;
}
d->gid = name;
return reallocdir(d, 1);
}
Dir*
dir_change_muid(Dir *d, char *name)
{
if(d->muid && strlen(d->muid) >= strlen(name)){
strcpy(d->name, name);
return d;
}
d->muid = name;
return reallocdir(d, 1);
}
static int
nw_mode(char dirlet, char *s) /* NetWare file mode mapping */
{
int mode = 0777;
if(dirlet == 'd')
mode |= DMDIR;
if (strlen(s) >= 10 && s[0] != '[' || s[9] != ']')
return(mode);
if (s[1] == '-') /* can't read file */
mode &= ~0444;
if (dirlet == 'd' && s[6] == '-') /* cannot scan dir */
mode &= ~0444;
if (s[2] == '-') /* can't write file */
mode &= ~0222;
if (dirlet == 'd' && s[7] == '-' && s[3] == '-') /* cannot create in, or modify dir */
mode &= ~0222;
return(mode);
}