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tnftp  20100108
Classes | Defines | Functions | Variables
ftp.c File Reference
#include "tnftp.h"
#include <arpa/telnet.h>
#include "ftp_var.h"

Go to the source code of this file.

Classes

struct  sockinet
union  sockinet::sockunion

Defines

#define su_len   si_len
#define su_family   si_su.su_sin.sin_family
#define su_port   si_su.su_sin.sin_port
#define pack2(var, off)   (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
#define pack4(var, off)
#define UC(b)   (((int)b)&0xff)

Functions

static int empty (FILE *, FILE *, int)
char * hookup (const char *host, const char *port)
void cmdabort (int notused)
void cmdtimeout (int notused)
int command (const char *fmt,...)
int getreply (int expecteof)
void abortxfer (int notused)
static int copy_bytes (int infd, int outfd, char *buf, size_t bufsize, int rate_limit, int hash_interval)
void sendrequest (const char *cmd, const char *local, const char *remote, int printnames)
void recvrequest (const char *cmd, const char *volatile local, const char *remote, const char *lmode, int printnames, int ignorespecial)
int initconn (void)
FILE * dataconn (const char *lmode)
void psabort (int notused)
void pswitch (int flag)
void abortpt (int notused)
void proxtrans (const char *cmd, const char *local, const char *remote)
void reset (int argc, char *argv[])
char * gunique (const char *local)
void abort_squared (int dummy)
void abort_remote (FILE *din)
void ai_unmapped (struct addrinfo *ai)

Variables

volatile sig_atomic_t abrtflag
volatile sig_atomic_t timeoutflag
sigjmp_buf ptabort
int ptabflg
int ptflag = 0
char pasv [BUFSIZ]
static const char * m421 []
sigjmp_buf xferabort

Class Documentation

struct sockinet

Definition at line 69 of file getnameinfo.c.

Collaboration diagram for sockinet:
Class Members
unsigned char si_family
unsigned char si_len
int si_len
unsigned short si_port
union sockunion si_su
union sockinet::sockunion

Definition at line 144 of file ftp.c.


Define Documentation

#define pack2 (   var,
  off 
)    (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
#define pack4 (   var,
  off 
)
Value:
(((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \
        ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0))
#define su_family   si_su.su_sin.sin_family

Definition at line 160 of file ftp.c.

#define su_len   si_len

Definition at line 156 of file ftp.c.

#define su_port   si_su.su_sin.sin_port

Definition at line 161 of file ftp.c.

#define UC (   b)    (((int)b)&0xff)

Function Documentation

void abort_remote ( FILE *  din)

Definition at line 2051 of file ftp.c.

{
       char buf[BUFSIZ];
       int nfnd;

       if (cout == NULL) {
              warnx("Lost control connection for abort");
              if (ptabflg)
                     code = -1;
              lostpeer(0);
              return;
       }
       /*
        * send IAC in urgent mode instead of DM because 4.3BSD places oob mark
        * after urgent byte rather than before as is protocol now
        */
       buf[0] = IAC;
       buf[1] = IP;
       buf[2] = IAC;
       if (send(fileno(cout), buf, 3, MSG_OOB) != 3)
              warn("Can't send abort message");
       fprintf(cout, "%cABOR\r\n", DM);
       (void)fflush(cout);
       if ((nfnd = empty(cin, din, 10)) <= 0) {
              if (nfnd < 0)
                     warn("Can't send abort message");
              if (ptabflg)
                     code = -1;
              lostpeer(0);
       }
       if (din && (nfnd & 2)) {
              while (read(fileno(din), buf, BUFSIZ) > 0)
                     continue;
       }
       if (getreply(0) == ERROR && code == 552) {
              /* 552 needed for nic style abort */
              (void)getreply(0);
       }
       (void)getreply(0);
}

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void abort_squared ( int  dummy)

Definition at line 2036 of file ftp.c.

{
       char msgbuf[100];
       size_t len;

       sigint_raised = 1;
       alarmtimer(0);
       len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n",
           sizeof(msgbuf));
       write(fileno(ttyout), msgbuf, len);
       lostpeer(0);
       siglongjmp(xferabort, 1);
}

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void abortpt ( int  notused)

Definition at line 1824 of file ftp.c.

{

       sigint_raised = 1;
       alarmtimer(0);
       if (fromatty)
              write(fileno(ttyout), "\n", 1);
       ptabflg++;
       mflag = 0;
       abrtflag = 0;
       siglongjmp(ptabort, 1);
}

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void abortxfer ( int  notused)

Definition at line 549 of file ftp.c.

{
       char msgbuf[100];
       size_t len;

       sigint_raised = 1;
       alarmtimer(0);
       mflag = 0;
       abrtflag = 0;
       switch (direction[0]) {
       case 'r':
              strlcpy(msgbuf, "\nreceive", sizeof(msgbuf));
              break;
       case 's':
              strlcpy(msgbuf, "\nsend", sizeof(msgbuf));
              break;
       default:
              errx(1, "abortxfer: unknown direction `%s'", direction);
       }
       len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n",
           sizeof(msgbuf));
       write(fileno(ttyout), msgbuf, len);
       siglongjmp(xferabort, 1);
}

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void ai_unmapped ( struct addrinfo ai)

Definition at line 2111 of file ftp.c.

{
#ifdef INET6
       struct sockaddr_in6 *sin6;
       struct sockaddr_in sin;
       socklen_t len;

       if (ai->ai_family != AF_INET6)
              return;
       if (ai->ai_addrlen != sizeof(struct sockaddr_in6) ||
           sizeof(sin) > ai->ai_addrlen)
              return;
       sin6 = (struct sockaddr_in6 *)ai->ai_addr;
       if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
              return;

       memset(&sin, 0, sizeof(sin));
       sin.sin_family = AF_INET;
       len = sizeof(struct sockaddr_in);
       memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
           sizeof(sin.sin_addr));
       sin.sin_port = sin6->sin6_port;

       ai->ai_family = AF_INET;
#if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
       sin.sin_len = len;
#endif
       memcpy(ai->ai_addr, &sin, len);
       ai->ai_addrlen = len;
#endif
}

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void cmdabort ( int  notused)

Definition at line 290 of file ftp.c.

{
       int oerrno = errno;

       sigint_raised = 1;
       alarmtimer(0);
       if (fromatty)
              write(fileno(ttyout), "\n", 1);
       abrtflag++;
       if (ptflag)
              siglongjmp(ptabort, 1);
       errno = oerrno;
}

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void cmdtimeout ( int  notused)

Definition at line 305 of file ftp.c.

{
       int oerrno = errno;

       alarmtimer(0);
       if (fromatty)
              write(fileno(ttyout), "\n", 1);
       timeoutflag++;
       if (ptflag)
              siglongjmp(ptabort, 1);
       errno = oerrno;
}

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int command ( const char *  fmt,
  ... 
)

Definition at line 320 of file ftp.c.

{
       va_list ap;
       int r;
       sigfunc oldsigint;

#ifndef NO_DEBUG
       if (ftp_debug) {
              fputs("---> ", ttyout);
              va_start(ap, fmt);
              if (strncmp("PASS ", fmt, 5) == 0)
                     fputs("PASS XXXX", ttyout);
              else if (strncmp("ACCT ", fmt, 5) == 0)
                     fputs("ACCT XXXX", ttyout);
              else
                     vfprintf(ttyout, fmt, ap);
              va_end(ap);
              putc('\n', ttyout);
       }
#endif
       if (cout == NULL) {
              warnx("No control connection for command");
              code = -1;
              return (0);
       }

       abrtflag = 0;

       oldsigint = xsignal(SIGINT, cmdabort);

       va_start(ap, fmt);
       vfprintf(cout, fmt, ap);
       va_end(ap);
       fputs("\r\n", cout);
       (void)fflush(cout);
       cpend = 1;
       r = getreply(!strcmp(fmt, "QUIT"));
       if (abrtflag && oldsigint != SIG_IGN)
              (*oldsigint)(SIGINT);
       (void)xsignal(SIGINT, oldsigint);
       return (r);
}

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static int copy_bytes ( int  infd,
int  outfd,
char *  buf,
size_t  bufsize,
int  rate_limit,
int  hash_interval 
) [static]

Definition at line 584 of file ftp.c.

{
       volatile off_t       hashc;
       ssize_t              inc, outc;
       char          *bufp;
       struct timeval       tvthen, tvnow, tvdiff;
       off_t         bufrem, bufchunk;
       int           serr;

       hashc = hash_interval;
       if (rate_limit)
              bufchunk = rate_limit;
       else
              bufchunk = bufsize;

       while (1) {
              if (rate_limit) {
                     (void)gettimeofday(&tvthen, NULL);
              }
              errno = 0;
              inc = outc = 0;
                                   /* copy bufchunk at a time */
              bufrem = bufchunk;
              while (bufrem > 0) {
                     inc = read(infd, buf, MIN((off_t)bufsize, bufrem));
                     if (inc <= 0)
                            goto copy_done;
                     bytes += inc;
                     bufrem -= inc;
                     bufp = buf;
                     while (inc > 0) {
                            outc = write(outfd, bufp, inc);
                            if (outc < 0)
                                   goto copy_done;
                            inc -= outc;
                            bufp += outc;
                     }
                     if (hash_interval) {
                            while (bytes >= hashc) {
                                   (void)putc('#', ttyout);
                                   hashc += hash_interval;
                            }
                            (void)fflush(ttyout);
                     }
              }
              if (rate_limit) {    /* rate limited; wait if necessary */
                     while (1) {
                            (void)gettimeofday(&tvnow, NULL);
                            timersub(&tvnow, &tvthen, &tvdiff);
                            if (tvdiff.tv_sec > 0)
                                   break;
                            usleep(1000000 - tvdiff.tv_usec);
                     }
              }
       }

 copy_done:
       serr = errno;
       if (hash_interval && bytes > 0) {
              if (bytes < hash_interval)
                     (void)putc('#', ttyout);
              (void)putc('\n', ttyout);
              (void)fflush(ttyout);
       }
       errno = serr;
       if (inc == -1)
              return 1;
       if (outc == -1)
              return 2;

       return 0;
}

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FILE* dataconn ( const char *  lmode)

Definition at line 1650 of file ftp.c.

{
       struct sockinet      from;
       int           s, flags, rv, timeout;
       struct timeval       endtime, now, td;
       struct pollfd pfd[1];
       socklen_t     fromlen;

       if (passivemode)     /* passive data connection */
              return (fdopen(data, lmode));

                            /* active mode data connection */

       if ((flags = fcntl(data, F_GETFL, 0)) == -1)
              goto dataconn_failed;              /* get current socket flags  */
       if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1)
              goto dataconn_failed;              /* set non-blocking connect */

              /* NOTE: we now must restore socket flags on successful exit */

                            /* limit time waiting on listening socket */
       pfd[0].fd = data;
       pfd[0].events = POLLIN;
       (void)gettimeofday(&endtime, NULL);       /* determine end time */
       endtime.tv_sec += (quit_time > 0) ? quit_time: 60;
                                          /* without -q, default to 60s */
       do {
              (void)gettimeofday(&now, NULL);
              timersub(&endtime, &now, &td);
              timeout = td.tv_sec * 1000 + td.tv_usec/1000;
              if (timeout < 0)
                     timeout = 0;
              rv = ftp_poll(pfd, 1, timeout);
       } while (rv == -1 && errno == EINTR);     /* loop until poll ! EINTR */
       if (rv == -1) {
              warn("Can't poll waiting before accept");
              goto dataconn_failed;
       }
       if (rv == 0) {
              warnx("Poll timeout waiting before accept");
              goto dataconn_failed;
       }

                            /* (non-blocking) accept the connection */
       fromlen = myctladdr.su_len;
       do {
              s = accept(data, (struct sockaddr *) &from.si_su, &fromlen);
       } while (s == -1 && errno == EINTR);      /* loop until accept ! EINTR */
       if (s == -1) {
              warn("Can't accept data connection");
              goto dataconn_failed;
       }

       (void)close(data);
       data = s;
       if (fcntl(data, F_SETFL, flags) == -1)    /* restore socket flags */
              goto dataconn_failed;

#ifdef IPTOS_THROUGHPUT
       if (from.su_family == AF_INET) {
              int tos = IPTOS_THROUGHPUT;
              if (setsockopt(s, IPPROTO_IP, IP_TOS,
                            (void *)&tos, sizeof(tos)) == -1) {
                     DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
              }
       }
#endif
       return (fdopen(data, lmode));

 dataconn_failed:
       (void)close(data);
       data = -1;
       return (NULL);
}

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static int empty ( FILE *  ecin,
FILE *  din,
int  sec 
) [static]
int getreply ( int  expecteof)

Definition at line 370 of file ftp.c.

{
       char current_line[BUFSIZ];  /* last line of previous reply */
       int c, n, lineno;
       int dig;
       int originalcode = 0, continuation = 0;
       sigfunc oldsigint, oldsigalrm;
       int pflag = 0;
       char *cp, *pt = pasv;

       abrtflag = 0;
       timeoutflag = 0;

       oldsigint = xsignal(SIGINT, cmdabort);
       oldsigalrm = xsignal(SIGALRM, cmdtimeout);

       for (lineno = 0 ;; lineno++) {
              dig = n = code = 0;
              cp = current_line;
              while (alarmtimer(quit_time ? quit_time : 60),
                     ((c = getc(cin)) != '\n')) {
                     if (c == IAC) {     /* handle telnet commands */
                            switch (c = getc(cin)) {
                            case WILL:
                            case WONT:
                                   c = getc(cin);
                                   fprintf(cout, "%c%c%c", IAC, DONT, c);
                                   (void)fflush(cout);
                                   break;
                            case DO:
                            case DONT:
                                   c = getc(cin);
                                   fprintf(cout, "%c%c%c", IAC, WONT, c);
                                   (void)fflush(cout);
                                   break;
                            default:
                                   break;
                            }
                            continue;
                     }
                     dig++;
                     if (c == EOF) {
                            /*
                             * these will get trashed by pswitch()
                             * in lostpeer()
                             */
                            int reply_timeoutflag = timeoutflag;
                            int reply_abrtflag = abrtflag;

                            alarmtimer(0);
                            if (expecteof && feof(cin)) {
                                   (void)xsignal(SIGINT, oldsigint);
                                   (void)xsignal(SIGALRM, oldsigalrm);
                                   code = 221;
                                   return (0);
                            }
                            cpend = 0;
                            lostpeer(0);
                            if (verbose) {
                                   size_t midx;
                                   if (reply_timeoutflag)
                                          midx = 0;
                                   else if (reply_abrtflag)
                                          midx = 1;
                                   else
                                          midx = 2;
                                   (void)fprintf(ttyout,
                         "421 Service not available, %s.\n", m421[midx]);
                                   (void)fflush(ttyout);
                            }
                            code = 421;
                            (void)xsignal(SIGINT, oldsigint);
                            (void)xsignal(SIGALRM, oldsigalrm);
                            return (4);
                     }
                     if (c != '\r' && (verbose > 0 ||
                         ((verbose > -1 && n == '5' && dig > 4) &&
                         (((!n && c < '5') || (n && n < '5'))
                          || !retry_connect)))) {
                            if (proxflag &&
                               (dig == 1 || (dig == 5 && verbose == 0)))
                                   fprintf(ttyout, "%s:", hostname);
                            (void)putc(c, ttyout);
                     }
                     if (dig < 4 && isdigit(c))
                            code = code * 10 + (c - '0');
                     if (!pflag && (code == 227 || code == 228))
                            pflag = 1;
                     else if (!pflag && code == 229)
                            pflag = 100;
                     if (dig > 4 && pflag == 1 && isdigit(c))
                            pflag = 2;
                     if (pflag == 2) {
                            if (c != '\r' && c != ')') {
                                   if (pt < &pasv[sizeof(pasv) - 1])
                                          *pt++ = c;
                            } else {
                                   *pt = '\0';
                                   pflag = 3;
                            }
                     }
                     if (pflag == 100 && c == '(')
                            pflag = 2;
                     if (dig == 4 && c == '-') {
                            if (continuation)
                                   code = 0;
                            continuation++;
                     }
                     if (n == 0)
                            n = c;
                     if (cp < &current_line[sizeof(current_line) - 1])
                            *cp++ = c;
              }
              if (verbose > 0 || ((verbose > -1 && n == '5') &&
                  (n < '5' || !retry_connect))) {
                     (void)putc(c, ttyout);
                     (void)fflush(ttyout);
              }
              if (cp[-1] == '\r')
                     cp[-1] = '\0';
              *cp = '\0';
              if (lineno == 0)
                     (void)strlcpy(reply_string, current_line,
                         sizeof(reply_string));
              if (lineno > 0 && code == 0 && reply_callback != NULL)
                     (*reply_callback)(current_line);
              if (continuation && code != originalcode) {
                     if (originalcode == 0)
                            originalcode = code;
                     continue;
              }
              if (n != '1')
                     cpend = 0;
              alarmtimer(0);
              (void)xsignal(SIGINT, oldsigint);
              (void)xsignal(SIGALRM, oldsigalrm);
              if (code == 421 || originalcode == 421)
                     lostpeer(0);
              if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN)
                     (*oldsigint)(SIGINT);
              if (timeoutflag && oldsigalrm != cmdtimeout &&
                  oldsigalrm != SIG_IGN)
                     (*oldsigalrm)(SIGINT);
              return (n - '0');
       }
}

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char* gunique ( const char *  local)

Definition at line 1984 of file ftp.c.

{
       static char new[MAXPATHLEN];
       char *cp = strrchr(local, '/');
       int d, count=0, len;
       char ext = '1';

       if (cp)
              *cp = '\0';
       d = access(cp == local ? "/" : cp ? local : ".", W_OK);
       if (cp)
              *cp = '/';
       if (d < 0) {
              warn("Can't access `%s'", local);
              return (NULL);
       }
       len = strlcpy(new, local, sizeof(new));
       cp = &new[len];
       *cp++ = '.';
       while (!d) {
              if (++count == 100) {
                     fputs("runique: can't find unique file name.\n",
                         ttyout);
                     return (NULL);
              }
              *cp++ = ext;
              *cp = '\0';
              if (ext == '9')
                     ext = '0';
              else
                     ext++;
              if ((d = access(new, F_OK)) < 0)
                     break;
              if (ext != '0')
                     cp--;
              else if (*(cp - 2) == '.')
                     *(cp - 1) = '1';
              else {
                     *(cp - 2) = *(cp - 2) + 1;
                     cp--;
              }
       }
       return (new);
}

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char* hookup ( const char *  host,
const char *  port 
)

Definition at line 166 of file ftp.c.

{
       int s = -1, error;
       struct addrinfo hints, *res, *res0;
       static char hostnamebuf[MAXHOSTNAMELEN];
       socklen_t len;
       int on = 1;

       memset((char *)&hisctladdr, 0, sizeof (hisctladdr));
       memset((char *)&myctladdr, 0, sizeof (myctladdr));
       memset(&hints, 0, sizeof(hints));
       hints.ai_flags = AI_CANONNAME;
       hints.ai_family = family;
       hints.ai_socktype = SOCK_STREAM;
       hints.ai_protocol = 0;
       error = getaddrinfo(host, port, &hints, &res0);
       if (error) {
              warnx("Can't lookup `%s:%s': %s", host, port,
                  (error == EAI_SYSTEM) ? strerror(errno)
                                     : gai_strerror(error));
              code = -1;
              return (0);
       }

       if (res0->ai_canonname)
              (void)strlcpy(hostnamebuf, res0->ai_canonname,
                  sizeof(hostnamebuf));
       else
              (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf));
       hostname = hostnamebuf;

       for (res = res0; res; res = res->ai_next) {
              char hname[NI_MAXHOST], sname[NI_MAXSERV];

              ai_unmapped(res);
              if (getnameinfo(res->ai_addr, res->ai_addrlen,
                  hname, sizeof(hname), sname, sizeof(sname),
                  NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
                     strlcpy(hname, "?", sizeof(hname));
                     strlcpy(sname, "?", sizeof(sname));
              }
              if (verbose && res0->ai_next) {
                            /* if we have multiple possibilities */
                     fprintf(ttyout, "Trying %s:%s ...\n", hname, sname);
              }
              s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol);
              if (s < 0) {
                     warn("Can't create socket for connection to `%s:%s'",
                         hname, sname);
                     continue;
              }
              if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) {
                     close(s);
                     s = -1;
                     continue;
              }

              /* finally we got one */
              break;
       }
       if (s < 0) {
              warnx("Can't connect to `%s:%s'", host, port);
              code = -1;
              freeaddrinfo(res0);
              return 0;
       }
       memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen);
       hisctladdr.su_len = res->ai_addrlen;
       freeaddrinfo(res0);
       res0 = res = NULL;

       len = hisctladdr.su_len;
       if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) {
              warn("Can't determine my address of connection to `%s:%s'",
                  host, port);
              code = -1;
              goto bad;
       }
       myctladdr.su_len = len;

#ifdef IPTOS_LOWDELAY
       if (hisctladdr.su_family == AF_INET) {
              int tos = IPTOS_LOWDELAY;
              if (setsockopt(s, IPPROTO_IP, IP_TOS,
                            (void *)&tos, sizeof(tos)) == -1) {
                            DWARN("setsockopt %s (ignored)",
                                "IPTOS_LOWDELAY");
              }
       }
#endif
       cin = fdopen(s, "r");
       cout = fdopen(s, "w");
       if (cin == NULL || cout == NULL) {
              warnx("Can't fdopen socket");
              if (cin)
                     (void)fclose(cin);
              if (cout)
                     (void)fclose(cout);
              code = -1;
              goto bad;
       }
       if (verbose)
              fprintf(ttyout, "Connected to %s.\n", hostname);
       if (getreply(0) > 2) {      /* read startup message from server */
              if (cin)
                     (void)fclose(cin);
              if (cout)
                     (void)fclose(cout);
              code = -1;
              goto bad;
       }

       if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE,
                     (void *)&on, sizeof(on)) == -1) {
              DWARN("setsockopt %s (ignored)", "SO_OOBINLINE");
       }

       return (hostname);
 bad:
       (void)close(s);
       return (NULL);
}

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int initconn ( void  )

Definition at line 1201 of file ftp.c.

{
       char *p, *a;
       int result, tmpno = 0;
       int on = 1;
       int error;
       unsigned int addr[16], port[2];
       unsigned int af, hal, pal;
       socklen_t len;
       const char *pasvcmd = NULL;
       int overbose;

#ifdef INET6
#ifndef NO_DEBUG
       if (myctladdr.su_family == AF_INET6 && ftp_debug &&
           (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) ||
            IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) {
              warnx("Use of scoped addresses can be troublesome");
       }
#endif
#endif

 reinit:
       if (passivemode) {
              data_addr = myctladdr;
              data = socket(data_addr.su_family, SOCK_STREAM, 0);
              if (data < 0) {
                     warn("Can't create socket for data connection");
                     return (1);
              }
              if ((options & SO_DEBUG) &&
                  setsockopt(data, SOL_SOCKET, SO_DEBUG,
                            (void *)&on, sizeof(on)) == -1) {
                     DWARN("setsockopt %s (ignored)", "SO_DEBUG");
              }
              result = COMPLETE + 1;
              switch (data_addr.su_family) {
              case AF_INET:
                     if (epsv4 && !epsv4bad) {
                            pasvcmd = "EPSV";
                            overbose = verbose;
                            if (ftp_debug == 0)
                                   verbose = -1;
                            result = command("EPSV");
                            verbose = overbose;
                            if (verbose > 0 &&
                                (result == COMPLETE || !connected))
                                   fprintf(ttyout, "%s\n", reply_string);
                            if (!connected)
                                   return (1);
                            /*
                             * this code is to be friendly with broken
                             * BSDI ftpd
                             */
                            if (code / 10 == 22 && code != 229) {
                                   fputs(
"wrong server: return code must be 229\n",
                                          ttyout);
                                   result = COMPLETE + 1;
                            }
                            if (result != COMPLETE) {
                                   epsv4bad = 1;
                                   DPRINTF("disabling epsv4 for this "
                                       "connection\n");
                            }
                     }
                     if (result != COMPLETE) {
                            pasvcmd = "PASV";
                            result = command("PASV");
                            if (!connected)
                                   return (1);
                     }
                     break;
#ifdef INET6
              case AF_INET6:
                     if (epsv6 && !epsv6bad) {
                            pasvcmd = "EPSV";
                            overbose = verbose;
                            if (ftp_debug == 0)
                                   verbose = -1;
                            result = command("EPSV");
                            verbose = overbose;
                            if (verbose > 0 &&
                                (result == COMPLETE || !connected))
                                   fprintf(ttyout, "%s\n", reply_string);
                            if (!connected)
                                   return (1);
                            /*
                             * this code is to be friendly with
                             * broken BSDI ftpd
                             */
                            if (code / 10 == 22 && code != 229) {
                                   fputs(
                                          "wrong server: return code must be 229\n",
                                          ttyout);
                                   result = COMPLETE + 1;
                            }
                            if (result != COMPLETE) {
                                   epsv6bad = 1;
                                   DPRINTF("disabling epsv6 for this "
                                       "connection\n");
                            }
                     }
                     if (result != COMPLETE) {
                            pasvcmd = "LPSV";
                            result = command("LPSV");
                     }
                     if (!connected)
                            return (1);
                     break;
#endif
              default:
                     result = COMPLETE + 1;
                     break;
              }
              if (result != COMPLETE) {
                     if (activefallback) {
                            (void)close(data);
                            data = -1;
                            passivemode = 0;
#if 0
                            activefallback = 0;
#endif
                            goto reinit;
                     }
                     fputs("Passive mode refused.\n", ttyout);
                     goto bad;
              }

#define       pack2(var, off) \
       (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
#define       pack4(var, off) \
       (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \
        ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0))
#define       UC(b)  (((int)b)&0xff)

              /*
               * What we've got at this point is a string of comma separated
               * one-byte unsigned integer values, separated by commas.
               */
              if (strcmp(pasvcmd, "PASV") == 0) {
                     if (data_addr.su_family != AF_INET) {
                            fputs(
    "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
                            error = 1;
                            goto bad;
                     }
                     if (code / 10 == 22 && code != 227) {
                            fputs("wrong server: return code must be 227\n",
                                   ttyout);
                            error = 1;
                            goto bad;
                     }
                     error = sscanf(pasv, "%u,%u,%u,%u,%u,%u",
                                   &addr[0], &addr[1], &addr[2], &addr[3],
                                   &port[0], &port[1]);
                     if (error != 6) {
                            fputs(
"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
                            error = 1;
                            goto bad;
                     }
                     error = 0;
                     memset(&data_addr, 0, sizeof(data_addr));
                     data_addr.su_family = AF_INET;
                     data_addr.su_len = sizeof(struct sockaddr_in);
                     data_addr.si_su.su_sin.sin_addr.s_addr =
                         htonl(pack4(addr, 0));
                     data_addr.su_port = htons(pack2(port, 0));
              } else if (strcmp(pasvcmd, "LPSV") == 0) {
                     if (code / 10 == 22 && code != 228) {
                            fputs("wrong server: return code must be 228\n",
                                   ttyout);
                            error = 1;
                            goto bad;
                     }
                     switch (data_addr.su_family) {
                     case AF_INET:
                            error = sscanf(pasv,
"%u,%u,%u,%u,%u,%u,%u,%u,%u",
                                   &af, &hal,
                                   &addr[0], &addr[1], &addr[2], &addr[3],
                                   &pal, &port[0], &port[1]);
                            if (error != 9) {
                                   fputs(
"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
                                   error = 1;
                                   goto bad;
                            }
                            if (af != 4 || hal != 4 || pal != 2) {
                                   fputs(
"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
                                   error = 1;
                                   goto bad;
                            }

                            error = 0;
                            memset(&data_addr, 0, sizeof(data_addr));
                            data_addr.su_family = AF_INET;
                            data_addr.su_len = sizeof(struct sockaddr_in);
                            data_addr.si_su.su_sin.sin_addr.s_addr =
                                htonl(pack4(addr, 0));
                            data_addr.su_port = htons(pack2(port, 0));
                            break;
#ifdef INET6
                     case AF_INET6:
                            error = sscanf(pasv,
"%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u",
                                   &af, &hal,
                                   &addr[0], &addr[1], &addr[2], &addr[3],
                                   &addr[4], &addr[5], &addr[6], &addr[7],
                                   &addr[8], &addr[9], &addr[10],
                                   &addr[11], &addr[12], &addr[13],
                                   &addr[14], &addr[15],
                                   &pal, &port[0], &port[1]);
                            if (error != 21) {
                                   fputs(
"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
                                   error = 1;
                                   goto bad;
                            }
                            if (af != 6 || hal != 16 || pal != 2) {
                                   fputs(
"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
                                   error = 1;
                                   goto bad;
                            }

                            error = 0;
                            memset(&data_addr, 0, sizeof(data_addr));
                            data_addr.su_family = AF_INET6;
                            data_addr.su_len = sizeof(struct sockaddr_in6);
                         {
                            size_t i;
                            for (i = 0; i < sizeof(struct in6_addr); i++) {
                                   data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] =
                                       UC(addr[i]);
                            }
                         }
                            data_addr.su_port = htons(pack2(port, 0));
                            break;
#endif
                     default:
                            error = 1;
                     }
              } else if (strcmp(pasvcmd, "EPSV") == 0) {
                     char delim[4];

                     port[0] = 0;
                     if (code / 10 == 22 && code != 229) {
                            fputs("wrong server: return code must be 229\n",
                                   ttyout);
                            error = 1;
                            goto bad;
                     }
                     if (sscanf(pasv, "%c%c%c%d%c", &delim[0],
                                   &delim[1], &delim[2], &port[1],
                                   &delim[3]) != 5) {
                            fputs("parse error!\n", ttyout);
                            error = 1;
                            goto bad;
                     }
                     if (delim[0] != delim[1] || delim[0] != delim[2]
                      || delim[0] != delim[3]) {
                            fputs("parse error!\n", ttyout);
                            error = 1;
                            goto bad;
                     }
                     data_addr = hisctladdr;
                     data_addr.su_port = htons(port[1]);
              } else
                     goto bad;

              if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su,
                  data_addr.su_len) < 0) {
                     if (activefallback) {
                            (void)close(data);
                            data = -1;
                            passivemode = 0;
#if 0
                            activefallback = 0;
#endif
                            goto reinit;
                     }
                     goto bad;
              }
#ifdef IPTOS_THROUGHPUT
              if (data_addr.su_family == AF_INET) {
                     on = IPTOS_THROUGHPUT;
                     if (setsockopt(data, IPPROTO_IP, IP_TOS,
                                   (void *)&on, sizeof(on)) == -1) {
                            DWARN("setsockopt %s (ignored)",
                                "IPTOS_THROUGHPUT");
                     }
              }
#endif
              return (0);
       }

 noport:
       data_addr = myctladdr;
       if (sendport)
              data_addr.su_port = 0;      /* let system pick one */
       if (data != -1)
              (void)close(data);
       data = socket(data_addr.su_family, SOCK_STREAM, 0);
       if (data < 0) {
              warn("Can't create socket for data connection");
              if (tmpno)
                     sendport = 1;
              return (1);
       }
       if (!sendport)
              if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR,
                            (void *)&on, sizeof(on)) == -1) {
                     warn("Can't set SO_REUSEADDR on data connection");
                     goto bad;
              }
       if (bind(data, (struct sockaddr *)&data_addr.si_su,
           data_addr.su_len) < 0) {
              warn("Can't bind for data connection");
              goto bad;
       }
       if ((options & SO_DEBUG) &&
           setsockopt(data, SOL_SOCKET, SO_DEBUG,
                     (void *)&on, sizeof(on)) == -1) {
              DWARN("setsockopt %s (ignored)", "SO_DEBUG");
       }
       len = sizeof(data_addr.si_su);
       memset((char *)&data_addr, 0, sizeof (data_addr));
       if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) {
              warn("Can't determine my address of data connection");
              goto bad;
       }
       data_addr.su_len = len;
       if (ftp_listen(data, 1) < 0)
              warn("Can't listen to data connection");

       if (sendport) {
              char hname[NI_MAXHOST], sname[NI_MAXSERV];
              struct sockinet tmp;

              switch (data_addr.su_family) {
              case AF_INET:
                     if (!epsv4 || epsv4bad) {
                            result = COMPLETE + 1;
                            break;
                     }
                     /* FALLTHROUGH */
#ifdef INET6
              case AF_INET6:
                     if (!epsv6 || epsv6bad) {
                            result = COMPLETE + 1;
                            break;
                     }
#endif
                     af = (data_addr.su_family == AF_INET) ? 1 : 2;
                     tmp = data_addr;
#ifdef INET6
                     if (tmp.su_family == AF_INET6)
                            tmp.si_su.su_sin6.sin6_scope_id = 0;
#endif
                     if (getnameinfo((struct sockaddr *)&tmp.si_su,
                         tmp.su_len, hname, sizeof(hname), sname,
                         sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) {
                            result = ERROR;
                     } else {
                            overbose = verbose;
                            if (ftp_debug == 0)
                                   verbose = -1;
                            result = command("EPRT |%u|%s|%s|", af, hname,
                                sname);
                            verbose = overbose;
                            if (verbose > 0 &&
                                (result == COMPLETE || !connected))
                                   fprintf(ttyout, "%s\n", reply_string);
                            if (!connected)
                                   return (1);
                            if (result != COMPLETE) {
                                   epsv4bad = 1;
                                   DPRINTF("disabling epsv4 for this "
                                       "connection\n");
                            }
                     }
                     break;
              default:
                     result = COMPLETE + 1;
                     break;
              }
              if (result == COMPLETE)
                     goto skip_port;

              switch (data_addr.su_family) {
              case AF_INET:
                     a = (char *)&data_addr.si_su.su_sin.sin_addr;
                     p = (char *)&data_addr.su_port;
                     result = command("PORT %d,%d,%d,%d,%d,%d",
                             UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
                             UC(p[0]), UC(p[1]));
                     break;
#ifdef INET6
              case AF_INET6:
                     a = (char *)&data_addr.si_su.su_sin6.sin6_addr;
                     p = (char *)&data_addr.su_port;
                     result = command(
       "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
                             6, 16,
                             UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]),
                             UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]),
                             UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]),
                             UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]),
                             2, UC(p[0]), UC(p[1]));
                     break;
#endif
              default:
                     result = COMPLETE + 1; /* xxx */
              }
              if (!connected)
                     return (1);
       skip_port:

              if (result == ERROR && sendport == -1) {
                     sendport = 0;
                     tmpno = 1;
                     goto noport;
              }
              return (result != COMPLETE);
       }
       if (tmpno)
              sendport = 1;
#ifdef IPTOS_THROUGHPUT
       if (data_addr.su_family == AF_INET) {
              on = IPTOS_THROUGHPUT;
              if (setsockopt(data, IPPROTO_IP, IP_TOS,
                            (void *)&on, sizeof(on)) == -1) {
                     DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
              }
       }
#endif
       return (0);
 bad:
       (void)close(data);
       data = -1;
       if (tmpno)
              sendport = 1;
       return (1);
}

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void proxtrans ( const char *  cmd,
const char *  local,
const char *  remote 
)

Definition at line 1838 of file ftp.c.

{
       sigfunc volatile oldintr;
       int prox_type, nfnd;
       int volatile secndflag;
       const char *volatile cmd2;

       oldintr = NULL;
       secndflag = 0;
       if (strcmp(cmd, "RETR"))
              cmd2 = "RETR";
       else
              cmd2 = runique ? "STOU" : "STOR";
       if ((prox_type = type) == 0) {
              if (unix_server && unix_proxy)
                     prox_type = TYPE_I;
              else
                     prox_type = TYPE_A;
       }
       if (curtype != prox_type)
              changetype(prox_type, 1);
       if (command("PASV") != COMPLETE) {
              fputs("proxy server does not support third party transfers.\n",
                  ttyout);
              return;
       }
       pswitch(0);
       if (!connected) {
              fputs("No primary connection.\n", ttyout);
              pswitch(1);
              code = -1;
              return;
       }
       if (curtype != prox_type)
              changetype(prox_type, 1);
       if (command("PORT %s", pasv) != COMPLETE) {
              pswitch(1);
              return;
       }
       if (sigsetjmp(ptabort, 1))
              goto abort;
       oldintr = xsignal(SIGINT, abortpt);
       if ((restart_point &&
           (command("REST " LLF, (LLT) restart_point) != CONTINUE))
           || (command("%s %s", cmd, remote) != PRELIM)) {
              (void)xsignal(SIGINT, oldintr);
              pswitch(1);
              return;
       }
       sleep(2);
       pswitch(1);
       secndflag++;
       if ((restart_point &&
           (command("REST " LLF, (LLT) restart_point) != CONTINUE))
           || (command("%s %s", cmd2, local) != PRELIM))
              goto abort;
       ptflag++;
       (void)getreply(0);
       pswitch(0);
       (void)getreply(0);
       (void)xsignal(SIGINT, oldintr);
       pswitch(1);
       ptflag = 0;
       fprintf(ttyout, "local: %s remote: %s\n", local, remote);
       return;
 abort:
       if (sigsetjmp(xferabort, 1)) {
              (void)xsignal(SIGINT, oldintr);
              return;
       }
       (void)xsignal(SIGINT, abort_squared);
       ptflag = 0;
       if (strcmp(cmd, "RETR") && !proxy)
              pswitch(1);
       else if (!strcmp(cmd, "RETR") && proxy)
              pswitch(0);
       if (!cpend && !secndflag) {  /* only here if cmd = "STOR" (proxy=1) */
              if (command("%s %s", cmd2, local) != PRELIM) {
                     pswitch(0);
                     if (cpend)
                            abort_remote(NULL);
              }
              pswitch(1);
              if (ptabflg)
                     code = -1;
              (void)xsignal(SIGINT, oldintr);
              return;
       }
       if (cpend)
              abort_remote(NULL);
       pswitch(!proxy);
       if (!cpend && !secndflag) {  /* only if cmd = "RETR" (proxy=1) */
              if (command("%s %s", cmd2, local) != PRELIM) {
                     pswitch(0);
                     if (cpend)
                            abort_remote(NULL);
                     pswitch(1);
                     if (ptabflg)
                            code = -1;
                     (void)xsignal(SIGINT, oldintr);
                     return;
              }
       }
       if (cpend)
              abort_remote(NULL);
       pswitch(!proxy);
       if (cpend) {
              if ((nfnd = empty(cin, NULL, 10)) <= 0) {
                     if (nfnd < 0)
                            warn("Error aborting proxy command");
                     if (ptabflg)
                            code = -1;
                     lostpeer(0);
              }
              (void)getreply(0);
              (void)getreply(0);
       }
       if (proxy)
              pswitch(0);
       pswitch(1);
       if (ptabflg)
              code = -1;
       (void)xsignal(SIGINT, oldintr);
}

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void psabort ( int  notused)

Definition at line 1726 of file ftp.c.

{
       int oerrno = errno;

       sigint_raised = 1;
       alarmtimer(0);
       abrtflag++;
       errno = oerrno;
}

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void pswitch ( int  flag)

Definition at line 1737 of file ftp.c.

{
       sigfunc oldintr;
       static struct comvars {
              int connect;
              char name[MAXHOSTNAMELEN];
              struct sockinet mctl;
              struct sockinet hctl;
              FILE *in;
              FILE *out;
              int tpe;
              int curtpe;
              int cpnd;
              int sunqe;
              int runqe;
              int mcse;
              int ntflg;
              char nti[17];
              char nto[17];
              int mapflg;
              char mi[MAXPATHLEN];
              char mo[MAXPATHLEN];
       } proxstruct, tmpstruct;
       struct comvars *ip, *op;

       abrtflag = 0;
       oldintr = xsignal(SIGINT, psabort);
       if (flag) {
              if (proxy)
                     return;
              ip = &tmpstruct;
              op = &proxstruct;
              proxy++;
       } else {
              if (!proxy)
                     return;
              ip = &proxstruct;
              op = &tmpstruct;
              proxy = 0;
       }
       ip->connect = connected;
       connected = op->connect;
       if (hostname)
              (void)strlcpy(ip->name, hostname, sizeof(ip->name));
       else
              ip->name[0] = '\0';
       hostname = op->name;
       ip->hctl = hisctladdr;
       hisctladdr = op->hctl;
       ip->mctl = myctladdr;
       myctladdr = op->mctl;
       ip->in = cin;
       cin = op->in;
       ip->out = cout;
       cout = op->out;
       ip->tpe = type;
       type = op->tpe;
       ip->curtpe = curtype;
       curtype = op->curtpe;
       ip->cpnd = cpend;
       cpend = op->cpnd;
       ip->sunqe = sunique;
       sunique = op->sunqe;
       ip->runqe = runique;
       runique = op->runqe;
       ip->mcse = mcase;
       mcase = op->mcse;
       ip->ntflg = ntflag;
       ntflag = op->ntflg;
       (void)strlcpy(ip->nti, ntin, sizeof(ip->nti));
       (void)strlcpy(ntin, op->nti, sizeof(ntin));
       (void)strlcpy(ip->nto, ntout, sizeof(ip->nto));
       (void)strlcpy(ntout, op->nto, sizeof(ntout));
       ip->mapflg = mapflag;
       mapflag = op->mapflg;
       (void)strlcpy(ip->mi, mapin, sizeof(ip->mi));
       (void)strlcpy(mapin, op->mi, sizeof(mapin));
       (void)strlcpy(ip->mo, mapout, sizeof(ip->mo));
       (void)strlcpy(mapout, op->mo, sizeof(mapout));
       (void)xsignal(SIGINT, oldintr);
       if (abrtflag) {
              abrtflag = 0;
              (*oldintr)(SIGINT);
       }
}

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void recvrequest ( const char *  cmd,
const char *volatile  local,
const char *  remote,
const char *  lmode,
int  printnames,
int  ignorespecial 
)

Definition at line 889 of file ftp.c.

{
       FILE *volatile fout;
       FILE *volatile din;
       int (*volatile closefunc)(FILE *);
       sigfunc volatile oldintr;
       sigfunc volatile oldintp;
       int c, d;
       int volatile is_retr;
       int volatile tcrflag;
       int volatile bare_lfs;
       static size_t bufsize;
       static char *buf;
       off_t volatile hashbytes;
       int hash_interval;
       struct stat st;
       time_t mtime;
       struct timeval tval[2];
       int oprogress;
       int opreserve;

       fout = NULL;
       din = NULL;
       hashbytes = mark;
       direction = "received";
       bytes = 0;
       bare_lfs = 0;
       filesize = -1;
       oprogress = progress;
       opreserve = preserve;
       is_retr = (strcmp(cmd, "RETR") == 0);
       if (is_retr && verbose && printnames) {
              if (ignorespecial || *local != '-')
                     fprintf(ttyout, "local: %s ", local);
              if (remote)
                     fprintf(ttyout, "remote: %s\n", remote);
       }
       if (proxy && is_retr) {
              proxtrans(cmd, local, remote);
              return;
       }
       closefunc = NULL;
       oldintr = NULL;
       oldintp = NULL;
       tcrflag = !crflag && is_retr;
       if (sigsetjmp(xferabort, 1)) {
              while (cpend)
                     (void)getreply(0);
              code = -1;
              goto cleanuprecv;
       }
       (void)xsignal(SIGQUIT, psummary);
       oldintr = xsignal(SIGINT, abortxfer);
       if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
              if (access(local, W_OK) < 0) {
                     char *dir = strrchr(local, '/');

                     if (errno != ENOENT && errno != EACCES) {
                            warn("Can't access `%s'", local);
                            code = -1;
                            goto cleanuprecv;
                     }
                     if (dir != NULL)
                            *dir = 0;
                     d = access(dir == local ? "/" :
                         dir ? local : ".", W_OK);
                     if (dir != NULL)
                            *dir = '/';
                     if (d < 0) {
                            warn("Can't access `%s'", local);
                            code = -1;
                            goto cleanuprecv;
                     }
                     if (!runique && errno == EACCES &&
                         chmod(local, (S_IRUSR|S_IWUSR)) < 0) {
                            warn("Can't chmod `%s'", local);
                            code = -1;
                            goto cleanuprecv;
                     }
                     if (runique && errno == EACCES &&
                        (local = gunique(local)) == NULL) {
                            code = -1;
                            goto cleanuprecv;
                     }
              }
              else if (runique && (local = gunique(local)) == NULL) {
                     code = -1;
                     goto cleanuprecv;
              }
       }
       if (!is_retr) {
              if (curtype != TYPE_A)
                     changetype(TYPE_A, 0);
       } else {
              if (curtype != type)
                     changetype(type, 0);
              filesize = remotesize(remote, 0);
              if (code == 421 || code == -1)
                     goto cleanuprecv;
       }
       if (initconn()) {
              code = -1;
              goto cleanuprecv;
       }
       if (sigsetjmp(xferabort, 1))
              goto abort;
       if (is_retr && restart_point &&
           command("REST " LLF, (LLT) restart_point) != CONTINUE)
              goto cleanuprecv;
       if (! EMPTYSTRING(remote)) {
              if (command("%s %s", cmd, remote) != PRELIM)
                     goto cleanuprecv;
       } else {
              if (command("%s", cmd) != PRELIM)
                     goto cleanuprecv;
       }
       din = dataconn("r");
       if (din == NULL)
              goto abort;
       if (!ignorespecial && strcmp(local, "-") == 0) {
              fout = stdout;
              progress = 0;
              preserve = 0;
       } else if (!ignorespecial && *local == '|') {
              oldintp = xsignal(SIGPIPE, SIG_IGN);
              fout = popen(local + 1, "w");
              if (fout == NULL) {
                     warn("Can't execute `%s'", local+1);
                     goto abort;
              }
              progress = 0;
              preserve = 0;
              closefunc = pclose;
       } else {
              fout = fopen(local, lmode);
              if (fout == NULL) {
                     warn("Can't open `%s'", local);
                     goto abort;
              }
              closefunc = fclose;
       }

       if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) {
              progress = 0;
              preserve = 0;
       }
       if ((size_t)rcvbuf_size > bufsize) {
              if (buf)
                     (void)free(buf);
              bufsize = rcvbuf_size;
              buf = ftp_malloc(bufsize);
       }

       progressmeter(-1);
       hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;

       switch (curtype) {

       case TYPE_I:
       case TYPE_L:
              if (is_retr && restart_point &&
                  lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
                     warn("Can't seek to restart `%s'", local);
                     goto cleanuprecv;
              }
              c = copy_bytes(fileno(din), fileno(fout), buf, bufsize,
                            rate_get, hash_interval);
              if (c == 1) {
                     if (errno != EPIPE)
                            warn("Reading from network");
                     bytes = -1;
              } else if (c == 2) {
                     warn("Writing `%s'", local);
              }
              break;

       case TYPE_A:
              if (is_retr && restart_point) {
                     int ch;
                     off_t i;

                     if (fseeko(fout, (off_t)0, SEEK_SET) < 0)
                            goto done;
                     for (i = 0; i++ < restart_point;) {
                            if ((ch = getc(fout)) == EOF)
                                   goto done;
                            if (ch == '\n')
                                   i++;
                     }
                     if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) {
 done:
                            warn("Can't seek to restart `%s'", local);
                            goto cleanuprecv;
                     }
              }
              while ((c = getc(din)) != EOF) {
                     if (c == '\n')
                            bare_lfs++;
                     while (c == '\r') {
                            while (hash_interval && bytes >= hashbytes) {
                                   (void)putc('#', ttyout);
                                   (void)fflush(ttyout);
                                   hashbytes += mark;
                            }
                            bytes++;
                            if ((c = getc(din)) != '\n' || tcrflag) {
                                   if (ferror(fout))
                                          goto break2;
                                   (void)putc('\r', fout);
                                   if (c == '\0') {
                                          bytes++;
                                          goto contin2;
                                   }
                                   if (c == EOF)
                                          goto contin2;
                            }
                     }
                     (void)putc(c, fout);
                     bytes++;
       contin2:      ;
              }
 break2:
              if (hash_interval) {
                     if (bytes < hashbytes)
                            (void)putc('#', ttyout);
                     (void)putc('\n', ttyout);
              }
              if (ferror(din)) {
                     if (errno != EPIPE)
                            warn("Reading from network");
                     bytes = -1;
              }
              if (ferror(fout))
                     warn("Writing `%s'", local);
              break;
       }

       progressmeter(1);
       if (closefunc != NULL) {
              (*closefunc)(fout);
              fout = NULL;
       }
       (void)fclose(din);
       din = NULL;
       (void)getreply(0);
       if (bare_lfs) {
              fprintf(ttyout,
                  "WARNING! %d bare linefeeds received in ASCII mode.\n",
                  bare_lfs);
              fputs("File may not have transferred correctly.\n", ttyout);
       }
       if (bytes >= 0 && is_retr) {
              if (bytes > 0)
                     ptransfer(0);
              if (preserve && (closefunc == fclose)) {
                     mtime = remotemodtime(remote, 0);
                     if (mtime != -1) {
                            (void)gettimeofday(&tval[0], NULL);
                            tval[1].tv_sec = mtime;
                            tval[1].tv_usec = 0;
                            if (utimes(local, tval) == -1) {
                                   fprintf(ttyout,
                            "Can't change modification time on %s to %s",
                                       local,
                                       rfc2822time(localtime(&mtime)));
                            }
                     }
              }
       }
       goto cleanuprecv;

 abort:
                     /*
                      * abort using RFC0959 recommended IP,SYNC sequence
                      */
       if (! sigsetjmp(xferabort, 1)) {
                     /* this is the first call */
              (void)xsignal(SIGINT, abort_squared);
              if (!cpend) {
                     code = -1;
                     goto cleanuprecv;
              }
              abort_remote(din);
       }
       code = -1;
       if (bytes > 0)
              ptransfer(0);

 cleanuprecv:
       if (oldintr)
              (void)xsignal(SIGINT, oldintr);
       if (oldintp)
              (void)xsignal(SIGPIPE, oldintp);
       if (data >= 0) {
              (void)close(data);
              data = -1;
       }
       if (closefunc != NULL && fout != NULL)
              (*closefunc)(fout);
       if (din)
              (void)fclose(din);
       progress = oprogress;
       preserve = opreserve;
       bytes = 0;
}

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void reset ( int  argc,
char *  argv[] 
)

Definition at line 1964 of file ftp.c.

{
       int nfnd = 1;

       if (argc == 0 && argv != NULL) {
              UPRINTF("usage: %s\n", argv[0]);
              code = -1;
              return;
       }
       while (nfnd > 0) {
              if ((nfnd = empty(cin, NULL, 0)) < 0) {
                     warn("Error resetting connection");
                     code = -1;
                     lostpeer(0);
              } else if (nfnd)
                     (void)getreply(0);
       }
}

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void sendrequest ( const char *  cmd,
const char *  local,
const char *  remote,
int  printnames 
)

Definition at line 659 of file ftp.c.

{
       struct stat st;
       int c;
       FILE *volatile fin;
       FILE *volatile dout;
       int (*volatile closefunc)(FILE *);
       sigfunc volatile oldintr;
       sigfunc volatile oldintp;
       off_t volatile hashbytes;
       int hash_interval;
       const char *lmode;
       static size_t bufsize;
       static char *buf;
       int oprogress;

       hashbytes = mark;
       direction = "sent";
       dout = NULL;
       bytes = 0;
       filesize = -1;
       oprogress = progress;
       if (verbose && printnames) {
              if (*local != '-')
                     fprintf(ttyout, "local: %s ", local);
              if (remote)
                     fprintf(ttyout, "remote: %s\n", remote);
       }
       if (proxy) {
              proxtrans(cmd, local, remote);
              return;
       }
       if (curtype != type)
              changetype(type, 0);
       closefunc = NULL;
       oldintr = NULL;
       oldintp = NULL;
       lmode = "w";
       if (sigsetjmp(xferabort, 1)) {
              while (cpend)
                     (void)getreply(0);
              code = -1;
              goto cleanupsend;
       }
       (void)xsignal(SIGQUIT, psummary);
       oldintr = xsignal(SIGINT, abortxfer);
       if (strcmp(local, "-") == 0) {
              fin = stdin;
              progress = 0;
       } else if (*local == '|') {
              oldintp = xsignal(SIGPIPE, SIG_IGN);
              fin = popen(local + 1, "r");
              if (fin == NULL) {
                     warn("Can't execute `%s'", local + 1);
                     code = -1;
                     goto cleanupsend;
              }
              progress = 0;
              closefunc = pclose;
       } else {
              fin = fopen(local, "r");
              if (fin == NULL) {
                     warn("Can't open `%s'", local);
                     code = -1;
                     goto cleanupsend;
              }
              closefunc = fclose;
              if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
                     fprintf(ttyout, "%s: not a plain file.\n", local);
                     code = -1;
                     goto cleanupsend;
              }
              filesize = st.st_size;
       }
       if (initconn()) {
              code = -1;
              goto cleanupsend;
       }
       if (sigsetjmp(xferabort, 1))
              goto abort;

       if (restart_point &&
           (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) {
              int rc;

              rc = -1;
              switch (curtype) {
              case TYPE_A:
                     rc = fseeko(fin, restart_point, SEEK_SET);
                     break;
              case TYPE_I:
              case TYPE_L:
                     rc = lseek(fileno(fin), restart_point, SEEK_SET);
                     break;
              }
              if (rc < 0) {
                     warn("Can't seek to restart `%s'", local);
                     goto cleanupsend;
              }
              if (command("REST " LLF, (LLT)restart_point) != CONTINUE)
                     goto cleanupsend;
              lmode = "r+";
       }
       if (remote) {
              if (command("%s %s", cmd, remote) != PRELIM)
                     goto cleanupsend;
       } else {
              if (command("%s", cmd) != PRELIM)
                     goto cleanupsend;
       }
       dirchange = 1;
       dout = dataconn(lmode);
       if (dout == NULL)
              goto abort;

       if ((size_t)sndbuf_size > bufsize) {
              if (buf)
                     (void)free(buf);
              bufsize = sndbuf_size;
              buf = ftp_malloc(bufsize);
       }

       progressmeter(-1);
       oldintp = xsignal(SIGPIPE, SIG_IGN);
       hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;

       switch (curtype) {

       case TYPE_I:
       case TYPE_L:
              c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize,
                            rate_put, hash_interval);
              if (c == 1) {
                     warn("Reading `%s'", local);
              } else if (c == 2) {
                     if (errno != EPIPE)
                            warn("Writing to network");
                     bytes = -1;
              }
              break;

       case TYPE_A:
              while ((c = getc(fin)) != EOF) {
                     if (c == '\n') {
                            while (hash_interval && bytes >= hashbytes) {
                                   (void)putc('#', ttyout);
                                   (void)fflush(ttyout);
                                   hashbytes += mark;
                            }
                            if (ferror(dout))
                                   break;
                            (void)putc('\r', dout);
                            bytes++;
                     }
                     (void)putc(c, dout);
                     bytes++;
#if 0  /* this violates RFC0959 */
                     if (c == '\r') {
                            (void)putc('\0', dout);
                            bytes++;
                     }
#endif
              }
              if (hash_interval) {
                     if (bytes < hashbytes)
                            (void)putc('#', ttyout);
                     (void)putc('\n', ttyout);
              }
              if (ferror(fin))
                     warn("Reading `%s'", local);
              if (ferror(dout)) {
                     if (errno != EPIPE)
                            warn("Writing to network");
                     bytes = -1;
              }
              break;
       }

       progressmeter(1);
       if (closefunc != NULL) {
              (*closefunc)(fin);
              fin = NULL;
       }
       (void)fclose(dout);
       dout = NULL;
       (void)getreply(0);
       if (bytes > 0)
              ptransfer(0);
       goto cleanupsend;

 abort:
       (void)xsignal(SIGINT, oldintr);
       oldintr = NULL;
       if (!cpend) {
              code = -1;
              goto cleanupsend;
       }
       if (data >= 0) {
              (void)close(data);
              data = -1;
       }
       if (dout) {
              (void)fclose(dout);
              dout = NULL;
       }
       (void)getreply(0);
       code = -1;
       if (bytes > 0)
              ptransfer(0);

 cleanupsend:
       if (oldintr)
              (void)xsignal(SIGINT, oldintr);
       if (oldintp)
              (void)xsignal(SIGPIPE, oldintp);
       if (data >= 0) {
              (void)close(data);
              data = -1;
       }
       if (closefunc != NULL && fin != NULL)
              (*closefunc)(fin);
       if (dout)
              (void)fclose(dout);
       progress = oprogress;
       restart_point = 0;
       bytes = 0;
}

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Variable Documentation

volatile sig_atomic_t abrtflag

Definition at line 133 of file ftp.c.

const char* m421[] [static]
Initial value:
 {
       "remote server timed out. Connection closed",
       "user interrupt. Connection closed",
       "remote server has closed connection",
}

Definition at line 363 of file ftp.c.

char pasv[BUFSIZ]

Definition at line 139 of file ftp.c.

int ptabflg

Definition at line 137 of file ftp.c.

sigjmp_buf ptabort

Definition at line 136 of file ftp.c.

int ptflag = 0

Definition at line 138 of file ftp.c.

volatile sig_atomic_t timeoutflag

Definition at line 134 of file ftp.c.

sigjmp_buf xferabort

Definition at line 546 of file ftp.c.