2 ** ftpsbr.c -- simple FTP client library
4 ** This code is Copyright (c) 2002, by the authors of nmh. See the
5 ** COPYRIGHT file in the root directory of the nmh distribution for
6 ** complete copyright information.
12 #ifdef HAVE_ARPA_FTP_H
13 # include <arpa/ftp.h>
16 #define v_debug debugsw
17 #define v_verbose verbosw
19 static int ftp_fd = NOTOK;
20 static int data_fd = NOTOK;
27 #include <sys/types.h>
28 #include <sys/socket.h>
29 #include <netinet/in.h>
33 #define start_tcp_client(res) \
34 socket (res->ai_family, res->ai_socktype, res->ai_protocol)
36 #define join_tcp_server(fd, sock, len) \
37 connect ((fd), (struct sockaddr *) (sock), len)
42 int ftp_get (char *, char *, char *, char *, char *, char *, int, int);
43 int ftp_trans (char *, char *, char *, char *, char *, char *, char *,
49 static int start_tcp_server (struct sockaddr_in *, int, int, int);
50 static void _asnprintf (char *, int, char *, va_list);
51 static int ftp_quit (void);
52 static int ftp_read (char *, char *, char *, int);
53 static int initconn (void);
54 static int dataconn (void);
55 static int command (int arg1, ...);
56 static int vcommand (int, va_list);
57 static int getreply (int, int);
61 start_tcp_server (struct sockaddr_in *sock, int backlog, int opt1, int opt2)
65 if ((sd = socket (AF_INET, SOCK_STREAM, 0)) == NOTOK)
68 if (bind (sd, (struct sockaddr *) sock, sizeof *sock) == NOTOK) {
82 #define join_tcp_client(fd,sock) \
83 accept ((fd), (struct sockaddr *) (sock), \
84 (__len__ = sizeof *(sock), &__len__))
86 #define read_tcp_socket read
87 #define write_tcp_socket write
88 #define close_tcp_socket close
91 _asnprintf (char *bp, int len_bp, char *what, va_list ap)
99 fmt = va_arg (ap, char *);
102 vsnprintf(bp, len_bp, fmt, ap);
112 snprintf (bp, len_bp, " %s: ", what);
117 if ((s = strerror(eindex)))
118 strncpy (bp, s, len_bp);
120 snprintf (bp, len_bp, "Error %d", eindex);
129 ftp_get (char *host, char *user, char *password, char *cwd,
130 char *remote, char *local, int ascii, int stayopen)
132 return ftp_trans (host, user, password, cwd, remote, local,
133 "RETR", ascii, stayopen);
138 ftp_trans (char *host, char *user, char *password, char *cwd, char *remote,
139 char *local, char *cmd, int ascii, int stayopen)
144 result = ftp_quit ();
149 if (ftp_fd == NOTOK) {
150 struct addrinfo hints, *res;
152 memset(&hints, 0, sizeof(hints));
154 hints.ai_flags = AI_ADDRCONFIG;
156 hints.ai_family = PF_INET;
157 hints.ai_socktype = SOCK_STREAM;
159 result = getaddrinfo(host, "ftp", &hints, &res);
162 fprintf(stderr, "%s/ftp: %s\n", host, gai_strerror(result));
166 if ((ftp_fd = start_tcp_client (res)) == NOTOK) {
171 if (join_tcp_server (ftp_fd, res->ai_addr, res->ai_addrlen) == NOTOK) {
174 close_tcp_socket (ftp_fd), ftp_fd = NOTOK;
181 fprintf (stdout, "Connected to %s\n", host);
186 if ((result = command (0, "USER %s", user)) == CONTINUE)
187 result = command (1, "PASS %s", password);
188 if (result != COMPLETE) {
198 if (cwd && ((result = command (0, "CWD %s", cwd)) != COMPLETE
199 && result != CONTINUE)) {
204 if (command (1, ascii ? "TYPE A" : "TYPE I") != COMPLETE) {
209 result = ftp_read (remote, local, cmd, ascii);
212 if (result != OK || !stayopen)
227 n = command (1, "QUIT");
228 close_tcp_socket (ftp_fd), ftp_fd = NOTOK;
229 return (n == 0 || n == COMPLETE ? OK : NOTOK);
233 ftp_read (char *remote, char *local, char *cmd, int ascii)
235 int istdio = 0, istore;
237 int expectingreply = 0;
241 if (initconn () == NOTOK)
245 if (command (-1, *remote ? "%s %s" : "%s", cmd, remote) != PRELIM)
249 if (dataconn () == NOTOK) {
253 if (data_fd != NOTOK)
254 close_tcp_socket (data_fd), data_fd = NOTOK;
261 istore = !strcmp (cmd, "STOR");
263 if ((istdio = !strcmp (local, "-")))
264 fp = istore ? stdin : stdout;
266 if ((fp = fopen (local, istore ? "r" : "w")) == NULL) {
276 if (!(out = fdopen (data_fd, "w"))) {
281 while ((c = getc (fp)) != EOF) {
284 if (putc (c, out) == EOF) {
295 while ((cc = fread (buffer, sizeof *buffer, sizeof buffer, fp)) > 0)
296 if (write_tcp_socket (data_fd, buffer, cc) != cc) {
297 perror ("write_tcp_socket");
301 close_tcp_socket (data_fd), data_fd = NOTOK;
308 if (!(in = fdopen (data_fd, "r"))) {
313 while ((c = getc (in)) != EOF) {
315 switch (c = getc (in)) {
329 if (putc (c, fp) == EOF) {
340 while ((cc = read_tcp_socket (data_fd, buffer, sizeof buffer)) > 0)
341 if (fwrite (buffer, sizeof *buffer, cc, fp) == 0) {
346 perror ("read_tcp_socket");
350 close_tcp_socket (data_fd), data_fd = NOTOK;
358 return (getreply (1, 0) == COMPLETE ? OK : NOTOK);
362 #define UC(b) (((int) b) & 0xff)
368 register char *a, *p;
369 struct sockaddr_in in_socket;
371 if (getsockname (ftp_fd, (struct sockaddr *) &in_socket,
372 (len = sizeof(in_socket), &len)) == NOTOK) {
373 perror ("getsockname");
376 in_socket.sin_port = 0;
377 if ((data_fd = start_tcp_server (&in_socket, 1, 0, 0)) == NOTOK) {
378 perror ("start_tcp_server");
382 if (getsockname (data_fd, (struct sockaddr *) &in_socket,
383 (len = sizeof in_socket, &len)) == NOTOK) {
384 perror ("getsockname");
388 a = (char *) &in_socket.sin_addr;
389 p = (char *) &in_socket.sin_port;
391 if (command (1, "PORT %d,%d,%d,%d,%d,%d",
392 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
393 UC(p[0]), UC(p[1])) == COMPLETE)
403 struct sockaddr_in in_socket;
405 if ((fd = join_tcp_client (data_fd, &in_socket)) == NOTOK) {
406 perror ("join_tcp_client");
409 close_tcp_socket (data_fd);
417 command (int arg1, ...)
423 val = vcommand (arg1, ap);
430 vcommand (int complete, va_list ap)
438 _asnprintf (buffer, sizeof(buffer), NULL, ap);
440 fprintf (stderr, "<--- %s\n", buffer);
442 strcat (buffer, "\r\n");
443 len = strlen (buffer);
445 if (write_tcp_socket (ftp_fd, buffer, len) != len) {
446 perror ("write_tcp_socket");
450 return (getreply (complete, !strcmp (buffer, "QUIT")));
455 getreply (int complete, int expecteof)
458 register int code, dig, n;
463 code = dig = n = continuation = 0;
469 if (read_tcp_socket (ftp_fd, &c, 1) < 1) {
473 perror ("read_tcp_socket");
478 *bp++ = c != '\r' ? c : '\0';
483 code = code * 10 + (c - '0');
484 else if (isspace (c))
485 /* XXX: naughty FTP... */
488 if (dig == 4 && c == '-')
495 fprintf (stderr, "---> %s\n", buffer);
502 fprintf (stdout, "%s\n", buffer);
506 if ((complete == -1 && n != PRELIM)
507 || (complete == 0 && n != CONTINUE && n != COMPLETE)
508 || (complete == 1 && n != COMPLETE))
509 fprintf (stderr, "%s\n", buffer);