2 * ftpsbr.c -- simple FTP client library
6 * This code is Copyright (c) 2002, by the authors of nmh. See the
7 * COPYRIGHT file in the root directory of the nmh distribution for
8 * complete copyright information.
14 #ifdef HAVE_ARPA_FTP_H
15 # include <arpa/ftp.h>
18 #define v_debug debugsw
19 #define v_verbose verbosw
21 static int ftp_fd = NOTOK;
22 static int data_fd = NOTOK;
29 #include <sys/types.h>
30 #include <sys/socket.h>
31 #include <netinet/in.h>
35 #define start_tcp_client(res) \
36 socket (res->ai_family, res->ai_socktype, res->ai_protocol)
38 #define join_tcp_server(fd, sock, len) \
39 connect ((fd), (struct sockaddr *) (sock), len)
44 int ftp_get (char *, char *, char *, char *, char *, char *, int, int);
45 int ftp_trans (char *, char *, char *, char *, char *, char *, char *, int, int);
50 static int start_tcp_server (struct sockaddr_in *, int, int, int);
51 static void _asnprintf (char *, int, char *, va_list);
52 static int ftp_quit (void);
53 static int ftp_read (char *, char *, char *, int);
54 static int initconn (void);
55 static int dataconn (void);
56 static int command (int arg1, ...);
57 static int vcommand (int, va_list);
58 static int getreply (int, int);
62 start_tcp_server (struct sockaddr_in *sock, int backlog, int opt1, int opt2)
66 if ((sd = socket (AF_INET, SOCK_STREAM, 0)) == NOTOK)
69 if (bind (sd, (struct sockaddr *) sock, sizeof *sock) == NOTOK) {
83 #define join_tcp_client(fd,sock) \
84 accept ((fd), (struct sockaddr *) (sock), \
85 (__len__ = sizeof *(sock), &__len__))
87 #define read_tcp_socket read
88 #define write_tcp_socket write
89 #define close_tcp_socket close
92 _asnprintf (char *bp, int len_bp, char *what, va_list ap)
100 fmt = va_arg (ap, char *);
103 vsnprintf(bp, len_bp, fmt, ap);
113 snprintf (bp, len_bp, " %s: ", what);
118 if ((s = strerror(eindex)))
119 strncpy (bp, s, len_bp);
121 snprintf (bp, len_bp, "Error %d", eindex);
130 ftp_get (char *host, char *user, char *password, char *cwd,
131 char *remote, char *local, int ascii, int stayopen)
133 return ftp_trans (host, user, password, cwd, remote, local,
134 "RETR", ascii, stayopen);
139 ftp_trans (char *host, char *user, char *password, char *cwd, char *remote,
140 char *local, char *cmd, int ascii, int stayopen)
145 result = ftp_quit ();
150 if (ftp_fd == NOTOK) {
151 struct addrinfo hints, *res;
153 memset(&hints, 0, sizeof(hints));
155 hints.ai_flags = AI_ADDRCONFIG;
157 hints.ai_family = PF_INET;
158 hints.ai_socktype = SOCK_STREAM;
160 result = getaddrinfo(host, "ftp", &hints, &res);
163 fprintf(stderr, "%s/ftp: %s\n", host, gai_strerror(result));
167 if ((ftp_fd = start_tcp_client (res)) == NOTOK) {
172 if (join_tcp_server (ftp_fd, res->ai_addr, res->ai_addrlen) == NOTOK) {
175 close_tcp_socket (ftp_fd), ftp_fd = NOTOK;
182 fprintf (stdout, "Connected to %s\n", host);
187 if ((result = command (0, "USER %s", user)) == CONTINUE)
188 result = command (1, "PASS %s", password);
189 if (result != COMPLETE) {
199 if (cwd && ((result = command (0, "CWD %s", cwd)) != COMPLETE
200 && result != CONTINUE)) {
205 if (command (1, ascii ? "TYPE A" : "TYPE I") != COMPLETE) {
210 result = ftp_read (remote, local, cmd, ascii);
213 if (result != OK || !stayopen)
228 n = command (1, "QUIT");
229 close_tcp_socket (ftp_fd), ftp_fd = NOTOK;
230 return (n == 0 || n == COMPLETE ? OK : NOTOK);
234 ftp_read (char *remote, char *local, char *cmd, int ascii)
236 int istdio = 0, istore;
238 int expectingreply = 0;
242 if (initconn () == NOTOK)
246 if (command (-1, *remote ? "%s %s" : "%s", cmd, remote) != PRELIM)
250 if (dataconn () == NOTOK) {
254 if (data_fd != NOTOK)
255 close_tcp_socket (data_fd), data_fd = NOTOK;
262 istore = !strcmp (cmd, "STOR");
264 if ((istdio = !strcmp (local, "-")))
265 fp = istore ? stdin : stdout;
267 if ((fp = fopen (local, istore ? "r" : "w")) == NULL) {
277 if (!(out = fdopen (data_fd, "w"))) {
282 while ((c = getc (fp)) != EOF) {
285 if (putc (c, out) == EOF) {
297 while ((cc = fread (buffer, sizeof *buffer, sizeof buffer, fp)) > 0)
298 if (write_tcp_socket (data_fd, buffer, cc) != cc) {
299 perror ("write_tcp_socket");
303 close_tcp_socket (data_fd), data_fd = NOTOK;
311 if (!(in = fdopen (data_fd, "r"))) {
316 while ((c = getc (in)) != EOF) {
318 switch (c = getc (in)) {
332 if (putc (c, fp) == EOF) {
344 while ((cc = read_tcp_socket (data_fd, buffer, sizeof buffer)) > 0)
345 if (fwrite (buffer, sizeof *buffer, cc, fp) == 0) {
350 perror ("read_tcp_socket");
354 close_tcp_socket (data_fd), data_fd = NOTOK;
362 return (getreply (1, 0) == COMPLETE ? OK : NOTOK);
366 #define UC(b) (((int) b) & 0xff)
372 register char *a, *p;
373 struct sockaddr_in in_socket;
375 if (getsockname (ftp_fd, (struct sockaddr *) &in_socket,
376 (len = sizeof(in_socket), &len)) == NOTOK) {
377 perror ("getsockname");
380 in_socket.sin_port = 0;
381 if ((data_fd = start_tcp_server (&in_socket, 1, 0, 0)) == NOTOK) {
382 perror ("start_tcp_server");
386 if (getsockname (data_fd, (struct sockaddr *) &in_socket,
387 (len = sizeof in_socket, &len)) == NOTOK) {
388 perror ("getsockname");
392 a = (char *) &in_socket.sin_addr;
393 p = (char *) &in_socket.sin_port;
395 if (command (1, "PORT %d,%d,%d,%d,%d,%d",
396 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
397 UC(p[0]), UC(p[1])) == COMPLETE)
407 struct sockaddr_in in_socket;
409 if ((fd = join_tcp_client (data_fd, &in_socket)) == NOTOK) {
410 perror ("join_tcp_client");
413 close_tcp_socket (data_fd);
421 command (int arg1, ...)
427 val = vcommand (arg1, ap);
434 vcommand (int complete, va_list ap)
442 _asnprintf (buffer, sizeof(buffer), NULL, ap);
444 fprintf (stderr, "<--- %s\n", buffer);
446 strcat (buffer, "\r\n");
447 len = strlen (buffer);
449 if (write_tcp_socket (ftp_fd, buffer, len) != len) {
450 perror ("write_tcp_socket");
454 return (getreply (complete, !strcmp (buffer, "QUIT")));
459 getreply (int complete, int expecteof)
462 register int code, dig, n;
467 code = dig = n = continuation = 0;
473 if (read_tcp_socket (ftp_fd, &c, 1) < 1) {
477 perror ("read_tcp_socket");
482 *bp++ = c != '\r' ? c : '\0';
487 code = code * 10 + (c - '0');
488 else /* XXX: naughty FTP... */
493 if (dig == 4 && c == '-')
500 fprintf (stderr, "---> %s\n", buffer);
507 fprintf (stdout, "%s\n", buffer);
512 if ((complete == -1 && n != PRELIM)
513 || (complete == 0 && n != CONTINUE && n != COMPLETE)
514 || (complete == 1 && n != COMPLETE))
515 fprintf (stderr, "%s\n", buffer);