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 #include "h/arpa_ftp.h"
14 #define v_debug debugsw
15 #define v_verbose verbosw
17 static int ftp_fd = NOTOK;
18 static int data_fd = NOTOK;
25 #include <sys/types.h>
26 #include <sys/socket.h>
27 #include <netinet/in.h>
31 #define start_tcp_client(res) \
32 socket (res->ai_family, res->ai_socktype, res->ai_protocol)
34 #define join_tcp_server(fd, sock, len) \
35 connect ((fd), (struct sockaddr *) (sock), len)
40 int ftp_get (char *, char *, char *, char *, char *, char *, int, int);
41 int ftp_trans (char *, char *, char *, char *, char *, char *, char *, int, int);
46 static int start_tcp_server (struct sockaddr_in *, int, int, int);
47 static void _asnprintf (char *, int, char *, va_list);
48 static int ftp_quit (void);
49 static int ftp_read (char *, char *, char *, int);
50 static int initconn (void);
51 static int dataconn (void);
52 static int command (int arg1, ...);
53 static int vcommand (int, va_list);
54 static int getreply (int, int);
58 start_tcp_server (struct sockaddr_in *sock, int backlog, int opt1, int opt2)
62 if ((sd = socket (AF_INET, SOCK_STREAM, 0)) == NOTOK)
65 if (bind (sd, (struct sockaddr *) sock, sizeof *sock) == NOTOK) {
79 #define join_tcp_client(fd,sock) \
80 accept ((fd), (struct sockaddr *) (sock), \
81 (__len__ = sizeof *(sock), &__len__))
83 #define read_tcp_socket read
84 #define write_tcp_socket write
85 #define close_tcp_socket close
88 _asnprintf (char *bp, int len_bp, char *what, va_list ap)
96 fmt = va_arg (ap, char *);
99 vsnprintf(bp, len_bp, fmt, ap);
109 snprintf (bp, len_bp, " %s: ", what);
114 if ((s = strerror(eindex)))
115 strncpy (bp, s, len_bp);
117 snprintf (bp, len_bp, "Error %d", eindex);
126 ftp_get (char *host, char *user, char *password, char *cwd,
127 char *remote, char *local, int ascii, int stayopen)
129 return ftp_trans (host, user, password, cwd, remote, local,
130 "RETR", ascii, stayopen);
135 ftp_trans (char *host, char *user, char *password, char *cwd, char *remote,
136 char *local, char *cmd, int ascii, int stayopen)
141 result = ftp_quit ();
146 if (ftp_fd == NOTOK) {
147 struct addrinfo hints, *res;
149 memset(&hints, 0, sizeof(hints));
151 hints.ai_flags = AI_ADDRCONFIG;
153 hints.ai_family = PF_INET;
154 hints.ai_socktype = SOCK_STREAM;
156 result = getaddrinfo(host, "ftp", &hints, &res);
159 fprintf(stderr, "%s/ftp: %s\n", host, gai_strerror(result));
163 if ((ftp_fd = start_tcp_client (res)) == NOTOK) {
168 if (join_tcp_server (ftp_fd, res->ai_addr, res->ai_addrlen) == NOTOK) {
171 close_tcp_socket (ftp_fd), ftp_fd = NOTOK;
178 fprintf (stdout, "Connected to %s\n", host);
183 if ((result = command (0, "USER %s", user)) == CONTINUE)
184 result = command (1, "PASS %s", password);
185 if (result != COMPLETE) {
195 if (cwd && ((result = command (0, "CWD %s", cwd)) != COMPLETE
196 && result != CONTINUE)) {
201 if (command (1, ascii ? "TYPE A" : "TYPE I") != COMPLETE) {
206 result = ftp_read (remote, local, cmd, ascii);
209 if (result != OK || !stayopen)
224 n = command (1, "QUIT");
225 close_tcp_socket (ftp_fd), ftp_fd = NOTOK;
226 return (n == 0 || n == COMPLETE ? OK : NOTOK);
230 ftp_read (char *remote, char *local, char *cmd, int ascii)
232 int istdio = 0, istore;
234 int expectingreply = 0;
238 if (initconn () == NOTOK)
242 if (command (-1, *remote ? "%s %s" : "%s", cmd, remote) != PRELIM)
246 if (dataconn () == NOTOK) {
250 if (data_fd != NOTOK)
251 close_tcp_socket (data_fd), data_fd = NOTOK;
258 istore = !strcmp (cmd, "STOR");
260 if ((istdio = !strcmp (local, "-")))
261 fp = istore ? stdin : stdout;
263 if ((fp = fopen (local, istore ? "r" : "w")) == NULL) {
273 if (!(out = fdopen (data_fd, "w"))) {
278 while ((c = getc (fp)) != EOF) {
281 if (putc (c, out) == EOF) {
293 while ((cc = fread (buffer, sizeof *buffer, sizeof buffer, fp)) > 0)
294 if (write_tcp_socket (data_fd, buffer, cc) != cc) {
295 perror ("write_tcp_socket");
299 close_tcp_socket (data_fd), data_fd = NOTOK;
307 if (!(in = fdopen (data_fd, "r"))) {
312 while ((c = getc (in)) != EOF) {
314 switch (c = getc (in)) {
328 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 /* XXX: naughty FTP... */
489 if (dig == 4 && c == '-')
496 fprintf (stderr, "---> %s\n", buffer);
503 fprintf (stdout, "%s\n", buffer);
508 if ((complete == -1 && n != PRELIM)
509 || (complete == 0 && n != CONTINUE && n != COMPLETE)
510 || (complete == 1 && n != COMPLETE))
511 fprintf (stderr, "%s\n", buffer);