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+/* $NetBSD: fetch.c,v 1.158 2005/05/14 15:26:43 lukem Exp $ */
+
+/*-
+ * Copyright (c) 1997-2004 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Luke Mewburn.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Scott Aaron Bamford.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__RCSID("$NetBSD: fetch.c,v 1.158 2005/05/14 15:26:43 lukem Exp $");
+#endif /* not lint */
+
+/*
+ * FTP User Program -- Command line file retrieval
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+
+#include <netinet/in.h>
+
+#include <arpa/ftp.h>
+#include <arpa/inet.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <netdb.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+#include <libutil.h>
+
+#include "ftp_var.h"
+#include "version.h"
+
+typedef enum {
+ UNKNOWN_URL_T=-1,
+ HTTP_URL_T,
+ FTP_URL_T,
+ FILE_URL_T,
+ CLASSIC_URL_T
+} url_t;
+
+void aborthttp(int);
+#ifndef NO_AUTH
+static int auth_url(const char *, char **, const char *, const char *);
+static void base64_encode(const unsigned char *, size_t, unsigned char *);
+#endif
+static int go_fetch(const char *);
+static int fetch_ftp(const char *);
+static int fetch_url(const char *, const char *, char *, char *);
+static const char *match_token(const char **, const char *);
+static int parse_url(const char *, const char *, url_t *, char **,
+ char **, char **, char **, in_port_t *, char **);
+static void url_decode(char *);
+
+static int redirect_loop;
+
+
+#define STRNEQUAL(a,b) (strncasecmp((a), (b), sizeof((b))-1) == 0)
+#define ISLWS(x) ((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t')
+#define SKIPLWS(x) do { while (ISLWS((*x))) x++; } while (0)
+
+
+#define ABOUT_URL "about:" /* propaganda */
+#define FILE_URL "file://" /* file URL prefix */
+#define FTP_URL "ftp://" /* ftp URL prefix */
+#define HTTP_URL "http://" /* http URL prefix */
+
+
+/*
+ * Determine if token is the next word in buf (case insensitive).
+ * If so, advance buf past the token and any trailing LWS, and
+ * return a pointer to the token (in buf). Otherwise, return NULL.
+ * token may be preceeded by LWS.
+ * token must be followed by LWS or NUL. (I.e, don't partial match).
+ */
+static const char *
+match_token(const char **buf, const char *token)
+{
+ const char *p, *orig;
+ size_t tlen;
+
+ tlen = strlen(token);
+ p = *buf;
+ SKIPLWS(p);
+ orig = p;
+ if (strncasecmp(p, token, tlen) != 0)
+ return NULL;
+ p += tlen;
+ if (*p != '\0' && !ISLWS(*p))
+ return NULL;
+ SKIPLWS(p);
+ orig = *buf;
+ *buf = p;
+ return orig;
+}
+
+#ifndef NO_AUTH
+/*
+ * Generate authorization response based on given authentication challenge.
+ * Returns -1 if an error occurred, otherwise 0.
+ * Sets response to a malloc(3)ed string; caller should free.
+ */
+static int
+auth_url(const char *challenge, char **response, const char *guser,
+ const char *gpass)
+{
+ const char *cp, *scheme;
+ char *ep, *clear, *realm;
+ char user[BUFSIZ], *pass;
+ int rval;
+ size_t len, clen, rlen;
+
+ *response = NULL;
+ clear = realm = NULL;
+ rval = -1;
+ cp = challenge;
+ scheme = "Basic"; /* only support Basic authentication */
+
+ if (debug)
+ fprintf(ttyout, "auth_url: challenge `%s'\n", challenge);
+
+ if (! match_token(&cp, scheme)) {
+ warnx("Unsupported authentication challenge - `%s'",
+ challenge);
+ goto cleanup_auth_url;
+ }
+
+#define REALM "realm=\""
+ if (STRNEQUAL(cp, REALM))
+ cp += sizeof(REALM) - 1;
+ else {
+ warnx("Unsupported authentication challenge - `%s'",
+ challenge);
+ goto cleanup_auth_url;
+ }
+/* XXX: need to improve quoted-string parsing to support \ quoting, etc. */
+ if ((ep = strchr(cp, '\"')) != NULL) {
+ size_t len = ep - cp;
+
+ realm = (char *)xmalloc(len + 1);
+ (void)strlcpy(realm, cp, len + 1);
+ } else {
+ warnx("Unsupported authentication challenge - `%s'",
+ challenge);
+ goto cleanup_auth_url;
+ }
+
+ fprintf(ttyout, "Username for `%s': ", realm);
+ if (guser != NULL) {
+ (void)strlcpy(user, guser, sizeof(user));
+ fprintf(ttyout, "%s\n", user);
+ } else {
+ (void)fflush(ttyout);
+ if (fgets(user, sizeof(user) - 1, stdin) == NULL) {
+ clearerr(stdin);
+ goto cleanup_auth_url;
+ }
+ user[strlen(user) - 1] = '\0';
+ }
+ if (gpass != NULL)
+ pass = (char *)gpass;
+ else
+ pass = getpass("Password: ");
+
+ clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */
+ clear = (char *)xmalloc(clen);
+ (void)strlcpy(clear, user, clen);
+ (void)strlcat(clear, ":", clen);
+ (void)strlcat(clear, pass, clen);
+ if (gpass == NULL)
+ memset(pass, 0, strlen(pass));
+
+ /* scheme + " " + enc + "\0" */
+ rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1;
+ *response = (char *)xmalloc(rlen);
+ (void)strlcpy(*response, scheme, rlen);
+ len = strlcat(*response, " ", rlen);
+ /* use `clen - 1' to not encode the trailing NUL */
+ base64_encode((unsigned char *)clear, clen - 1,
+ (unsigned char *)*response + len);
+ memset(clear, 0, clen);
+ rval = 0;
+
+ cleanup_auth_url:
+ FREEPTR(clear);
+ FREEPTR(realm);
+ return (rval);
+}
+
+/*
+ * Encode len bytes starting at clear using base64 encoding into encoded,
+ * which should be at least ((len + 2) * 4 / 3 + 1) in size.
+ */
+static void
+base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded)
+{
+ static const unsigned char enc[] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+ unsigned char *cp;
+ int i;
+
+ cp = encoded;
+ for (i = 0; i < len; i += 3) {
+ *(cp++) = enc[((clear[i + 0] >> 2))];
+ *(cp++) = enc[((clear[i + 0] << 4) & 0x30)
+ | ((clear[i + 1] >> 4) & 0x0f)];
+ *(cp++) = enc[((clear[i + 1] << 2) & 0x3c)
+ | ((clear[i + 2] >> 6) & 0x03)];
+ *(cp++) = enc[((clear[i + 2] ) & 0x3f)];
+ }
+ *cp = '\0';
+ while (i-- > len)
+ *(--cp) = '=';
+}
+#endif
+
+/*
+ * Decode %xx escapes in given string, `in-place'.
+ */
+static void
+url_decode(char *url)
+{
+ unsigned char *p, *q;
+
+ if (EMPTYSTRING(url))
+ return;
+ p = q = (unsigned char *)url;
+
+#define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10))
+ while (*p) {
+ if (p[0] == '%'
+ && p[1] && isxdigit((unsigned char)p[1])
+ && p[2] && isxdigit((unsigned char)p[2])) {
+ *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]);
+ p+=3;
+ } else
+ *q++ = *p++;
+ }
+ *q = '\0';
+}
+
+
+/*
+ * Parse URL of form:
+ * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>]
+ * Returns -1 if a parse error occurred, otherwise 0.
+ * It's the caller's responsibility to url_decode() the returned
+ * user, pass and path.
+ *
+ * Sets type to url_t, each of the given char ** pointers to a
+ * malloc(3)ed strings of the relevant section, and port to
+ * the number given, or ftpport if ftp://, or httpport if http://.
+ *
+ * If <host> is surrounded by `[' and ']', it's parsed as an
+ * IPv6 address (as per RFC 2732).
+ *
+ * XXX: this is not totally RFC 1738 compliant; <path> will have the
+ * leading `/' unless it's an ftp:// URL, as this makes things easier
+ * for file:// and http:// URLs. ftp:// URLs have the `/' between the
+ * host and the URL-path removed, but any additional leading slashes
+ * in the URL-path are retained (because they imply that we should
+ * later do "CWD" with a null argument).
+ *
+ * Examples:
+ * input URL output path
+ * --------- -----------
+ * "ftp://host" NULL
+ * "http://host/" NULL
+ * "file://host/dir/file" "dir/file"
+ * "ftp://host/" ""
+ * "ftp://host//" NULL
+ * "ftp://host//dir/file" "/dir/file"
+ */
+static int
+parse_url(const char *url, const char *desc, url_t *type,
+ char **user, char **pass, char **host, char **port,
+ in_port_t *portnum, char **path)
+{
+ const char *origurl;
+ char *cp, *ep, *thost, *tport;
+ size_t len;
+
+ if (url == NULL || desc == NULL || type == NULL || user == NULL
+ || pass == NULL || host == NULL || port == NULL || portnum == NULL
+ || path == NULL)
+ errx(1, "parse_url: invoked with NULL argument!");
+
+ origurl = url;
+ *type = UNKNOWN_URL_T;
+ *user = *pass = *host = *port = *path = NULL;
+ *portnum = 0;
+ tport = NULL;
+
+ if (STRNEQUAL(url, HTTP_URL)) {
+ url += sizeof(HTTP_URL) - 1;
+ *type = HTTP_URL_T;
+ *portnum = HTTP_PORT;
+ tport = httpport;
+ } else if (STRNEQUAL(url, FTP_URL)) {
+ url += sizeof(FTP_URL) - 1;
+ *type = FTP_URL_T;
+ *portnum = FTP_PORT;
+ tport = ftpport;
+ } else if (STRNEQUAL(url, FILE_URL)) {
+ url += sizeof(FILE_URL) - 1;
+ *type = FILE_URL_T;
+ } else {
+ warnx("Invalid %s `%s'", desc, url);
+ cleanup_parse_url:
+ FREEPTR(*user);
+ FREEPTR(*pass);
+ FREEPTR(*host);
+ FREEPTR(*port);
+ FREEPTR(*path);
+ return (-1);
+ }
+
+ if (*url == '\0')
+ return (0);
+
+ /* find [user[:pass]@]host[:port] */
+ ep = strchr(url, '/');
+ if (ep == NULL)
+ thost = xstrdup(url);
+ else {
+ len = ep - url;
+ thost = (char *)xmalloc(len + 1);
+ (void)strlcpy(thost, url, len + 1);
+ if (*type == FTP_URL_T) /* skip first / for ftp URLs */
+ ep++;
+ *path = xstrdup(ep);
+ }
+
+ cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */
+ if (cp != NULL) {
+ if (*type == FTP_URL_T)
+ anonftp = 0; /* disable anonftp */
+ *user = thost;
+ *cp = '\0';
+ thost = xstrdup(cp + 1);
+ cp = strchr(*user, ':');
+ if (cp != NULL) {
+ *cp = '\0';
+ *pass = xstrdup(cp + 1);
+ }
+ url_decode(*user);
+ if (*pass)
+ url_decode(*pass);
+ }
+
+#ifdef INET6
+ /*
+ * Check if thost is an encoded IPv6 address, as per
+ * RFC 2732:
+ * `[' ipv6-address ']'
+ */
+ if (*thost == '[') {
+ cp = thost + 1;
+ if ((ep = strchr(cp, ']')) == NULL ||
+ (ep[1] != '\0' && ep[1] != ':')) {
+ warnx("Invalid address `%s' in %s `%s'",
+ thost, desc, origurl);
+ goto cleanup_parse_url;
+ }
+ len = ep - cp; /* change `[xyz]' -> `xyz' */
+ memmove(thost, thost + 1, len);
+ thost[len] = '\0';
+ if (! isipv6addr(thost)) {
+ warnx("Invalid IPv6 address `%s' in %s `%s'",
+ thost, desc, origurl);
+ goto cleanup_parse_url;
+ }
+ cp = ep + 1;
+ if (*cp == ':')
+ cp++;
+ else
+ cp = NULL;
+ } else
+#endif /* INET6 */
+ if ((cp = strchr(thost, ':')) != NULL)
+ *cp++ = '\0';
+ *host = thost;
+
+ /* look for [:port] */
+ if (cp != NULL) {
+ long nport;
+
+ nport = parseport(cp, -1);
+ if (nport == -1) {
+ warnx("Unknown port `%s' in %s `%s'",
+ cp, desc, origurl);
+ goto cleanup_parse_url;
+ }
+ *portnum = nport;
+ tport = cp;
+ }
+
+ if (tport != NULL)
+ *port = xstrdup(tport);
+ if (*path == NULL)
+ *path = xstrdup("/");
+
+ if (debug)
+ fprintf(ttyout,
+ "parse_url: user `%s' pass `%s' host %s port %s(%d) "
+ "path `%s'\n",
+ *user ? *user : "<null>", *pass ? *pass : "<null>",
+ *host ? *host : "<null>", *port ? *port : "<null>",
+ *portnum ? *portnum : -1, *path ? *path : "<null>");
+
+ return (0);
+}
+
+sigjmp_buf httpabort;
+
+/*
+ * Retrieve URL, via a proxy if necessary, using HTTP.
+ * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or
+ * http_proxy as appropriate.
+ * Supports HTTP redirects.
+ * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
+ * is still open (e.g, ftp xfer with trailing /)
+ */
+static int
+fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth)
+{
+ struct addrinfo hints, *res, *res0 = NULL;
+ int error;
+ char hbuf[NI_MAXHOST];
+ volatile sigfunc oldintr, oldintp;
+ volatile int s;
+ struct stat sb;
+ int ischunked, isproxy, rval, hcode;
+ size_t len;
+ static size_t bufsize;
+ static char *xferbuf;
+ const char *cp, *token;
+ char *ep, *buf, *savefile;
+ char *auth, *location, *message;
+ char *user, *pass, *host, *port, *path, *decodedpath;
+ char *puser, *ppass, *useragent;
+ off_t hashbytes, rangestart, rangeend, entitylen;
+ int (*closefunc)(FILE *);
+ FILE *fin, *fout;
+ time_t mtime;
+ url_t urltype;
+ in_port_t portnum;
+
+ oldintr = oldintp = NULL;
+ closefunc = NULL;
+ fin = fout = NULL;
+ s = -1;
+ buf = savefile = NULL;
+ auth = location = message = NULL;
+ ischunked = isproxy = hcode = 0;
+ rval = 1;
+ user = pass = host = path = decodedpath = puser = ppass = NULL;
+
+#ifdef __GNUC__ /* shut up gcc warnings */
+ (void)&closefunc;
+ (void)&fin;
+ (void)&fout;
+ (void)&buf;
+ (void)&savefile;
+ (void)&rval;
+ (void)&isproxy;
+ (void)&hcode;
+ (void)&ischunked;
+ (void)&message;
+ (void)&location;
+ (void)&auth;
+ (void)&decodedpath;
+#endif
+
+ if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port,
+ &portnum, &path) == -1)
+ goto cleanup_fetch_url;
+
+ if (urltype == FILE_URL_T && ! EMPTYSTRING(host)
+ && strcasecmp(host, "localhost") != 0) {
+ warnx("No support for non local file URL `%s'", url);
+ goto cleanup_fetch_url;
+ }
+
+ if (EMPTYSTRING(path)) {
+ if (urltype == FTP_URL_T) {
+ rval = fetch_ftp(url);
+ goto cleanup_fetch_url;
+ }
+ if (urltype != HTTP_URL_T || outfile == NULL) {
+ warnx("Invalid URL (no file after host) `%s'", url);
+ goto cleanup_fetch_url;
+ }
+ }
+
+ decodedpath = xstrdup(path);
+ url_decode(decodedpath);
+
+ if (outfile)
+ savefile = xstrdup(outfile);
+ else {
+ cp = strrchr(decodedpath, '/'); /* find savefile */
+ if (cp != NULL)
+ savefile = xstrdup(cp + 1);
+ else
+ savefile = xstrdup(decodedpath);
+ }
+ if (EMPTYSTRING(savefile)) {
+ if (urltype == FTP_URL_T) {
+ rval = fetch_ftp(url);
+ goto cleanup_fetch_url;
+ }
+ warnx("no file after directory (you must specify an "
+ "output file) `%s'", url);
+ goto cleanup_fetch_url;
+ } else {
+ if (debug)
+ fprintf(ttyout, "savefile `%s'\n", savefile);
+ }
+
+ restart_point = 0;
+ filesize = -1;
+ rangestart = rangeend = entitylen = -1;
+ mtime = -1;
+ if (restartautofetch) {
+ if (strcmp(savefile, "-") != 0 && *savefile != '|' &&
+ stat(savefile, &sb) == 0)
+ restart_point = sb.st_size;
+ }
+ if (urltype == FILE_URL_T) { /* file:// URLs */
+ direction = "copied";
+ fin = fopen(decodedpath, "r");
+ if (fin == NULL) {
+ warn("Cannot open file `%s'", decodedpath);
+ goto cleanup_fetch_url;
+ }
+ if (fstat(fileno(fin), &sb) == 0) {
+ mtime = sb.st_mtime;
+ filesize = sb.st_size;
+ }
+ if (restart_point) {
+ if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
+ warn("Can't lseek to restart `%s'",
+ decodedpath);
+ goto cleanup_fetch_url;
+ }
+ }
+ if (verbose) {
+ fprintf(ttyout, "Copying %s", decodedpath);
+ if (restart_point)
+ fprintf(ttyout, " (restarting at " LLF ")",
+ (LLT)restart_point);
+ fputs("\n", ttyout);
+ }
+ } else { /* ftp:// or http:// URLs */
+ char *leading;
+ int hasleading;
+
+ if (proxyenv == NULL) {
+ if (urltype == HTTP_URL_T)
+ proxyenv = getoptionvalue("http_proxy");
+ else if (urltype == FTP_URL_T)
+ proxyenv = getoptionvalue("ftp_proxy");
+ }
+ direction = "retrieved";
+ if (! EMPTYSTRING(proxyenv)) { /* use proxy */
+ url_t purltype;
+ char *phost, *ppath;
+ char *pport, *no_proxy;
+
+ isproxy = 1;
+
+ /* check URL against list of no_proxied sites */
+ no_proxy = getoptionvalue("no_proxy");
+ if (! EMPTYSTRING(no_proxy)) {
+ char *np, *np_copy;
+ long np_port;
+ size_t hlen, plen;
+
+ np_copy = xstrdup(no_proxy);
+ hlen = strlen(host);
+ while ((cp = strsep(&np_copy, " ,")) != NULL) {
+ if (*cp == '\0')
+ continue;
+ if ((np = strrchr(cp, ':')) != NULL) {
+ *np = '\0';
+ np_port =
+ strtol(np + 1, &ep, 10);
+ if (*ep != '\0')
+ continue;
+ if (np_port != portnum)
+ continue;
+ }
+ plen = strlen(cp);
+ if (hlen < plen)
+ continue;
+ if (strncasecmp(host + hlen - plen,
+ cp, plen) == 0) {
+ isproxy = 0;
+ break;
+ }
+ }
+ FREEPTR(np_copy);
+ if (isproxy == 0 && urltype == FTP_URL_T) {
+ rval = fetch_ftp(url);
+ goto cleanup_fetch_url;
+ }
+ }
+
+ if (isproxy) {
+ if (parse_url(proxyenv, "proxy URL", &purltype,
+ &puser, &ppass, &phost, &pport, &portnum,
+ &ppath) == -1)
+ goto cleanup_fetch_url;
+
+ if ((purltype != HTTP_URL_T
+ && purltype != FTP_URL_T) ||
+ EMPTYSTRING(phost) ||
+ (! EMPTYSTRING(ppath)
+ && strcmp(ppath, "/") != 0)) {
+ warnx("Malformed proxy URL `%s'",
+ proxyenv);
+ FREEPTR(phost);
+ FREEPTR(pport);
+ FREEPTR(ppath);
+ goto cleanup_fetch_url;
+ }
+ if (isipv6addr(host) &&
+ strchr(host, '%') != NULL) {
+ warnx(
+"Scoped address notation `%s' disallowed via web proxy",
+ host);
+ FREEPTR(phost);
+ FREEPTR(pport);
+ FREEPTR(ppath);
+ goto cleanup_fetch_url;
+ }
+
+ FREEPTR(host);
+ host = phost;
+ FREEPTR(port);
+ port = pport;
+ FREEPTR(path);
+ path = xstrdup(url);
+ FREEPTR(ppath);
+ }
+ } /* ! EMPTYSTRING(proxyenv) */
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_flags = 0;
+ hints.ai_family = family;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_protocol = 0;
+ error = getaddrinfo(host, NULL, &hints, &res0);
+ if (error) {
+ warnx("%s", gai_strerror(error));
+ goto cleanup_fetch_url;
+ }
+ if (res0->ai_canonname)
+ host = res0->ai_canonname;
+
+ s = -1;
+ for (res = res0; res; res = res->ai_next) {
+ /*
+ * see comment in hookup()
+ */
+ ai_unmapped(res);
+ if (getnameinfo(res->ai_addr, res->ai_addrlen,
+ hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
+ strlcpy(hbuf, "invalid", sizeof(hbuf));
+
+ if (verbose && res != res0)
+ fprintf(ttyout, "Trying %s...\n", hbuf);
+
+ ((struct sockaddr_in *)res->ai_addr)->sin_port =
+ htons(portnum);
+ s = socket(res->ai_family, SOCK_STREAM,
+ res->ai_protocol);
+ if (s < 0) {
+ warn("Can't create socket");
+ continue;
+ }
+
+ if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) {
+ warn("Connect to address `%s'", hbuf);
+ close(s);
+ s = -1;
+ continue;
+ }
+
+ /* success */
+ break;
+ }
+
+ if (s < 0) {
+ warn("Can't connect to %s", host);
+ goto cleanup_fetch_url;
+ }
+
+ fin = fdopen(s, "r+");
+ /*
+ * Construct and send the request.
+ */
+ if (verbose)
+ fprintf(ttyout, "Requesting %s\n", url);
+ leading = " (";
+ hasleading = 0;
+ if (isproxy) {
+ if (verbose) {
+ fprintf(ttyout, "%svia %s:%s", leading,
+ host, port);
+ leading = ", ";
+ hasleading++;
+ }
+ fprintf(fin, "GET %s HTTP/1.0\r\n", path);
+ if (flushcache)
+ fprintf(fin, "Pragma: no-cache\r\n");
+ } else {
+ fprintf(fin, "GET %s HTTP/1.1\r\n", path);
+ if (strchr(host, ':')) {
+ char *h, *p;
+
+ /*
+ * strip off IPv6 scope identifier, since it is
+ * local to the node
+ */
+ h = xstrdup(host);
+ if (isipv6addr(h) &&
+ (p = strchr(h, '%')) != NULL) {
+ *p = '\0';
+ }
+ fprintf(fin, "Host: [%s]", h);
+ free(h);
+ } else
+ fprintf(fin, "Host: %s", host);
+ if (portnum != HTTP_PORT)
+ fprintf(fin, ":%u", portnum);
+ fprintf(fin, "\r\n");
+ fprintf(fin, "Accept: */*\r\n");
+ fprintf(fin, "Connection: close\r\n");
+ if (restart_point) {
+ fputs(leading, ttyout);
+ fprintf(fin, "Range: bytes=" LLF "-\r\n",
+ (LLT)restart_point);
+ fprintf(ttyout, "restarting at " LLF,
+ (LLT)restart_point);
+ leading = ", ";
+ hasleading++;
+ }
+ if (flushcache)
+ fprintf(fin, "Cache-Control: no-cache\r\n");
+ }
+ if ((useragent=getenv("FTPUSERAGENT")) != NULL) {
+ fprintf(fin, "User-Agent: %s\r\n", useragent);
+ } else {
+ fprintf(fin, "User-Agent: %s/%s\r\n",
+ FTP_PRODUCT, FTP_VERSION);
+ }
+ if (wwwauth) {
+ if (verbose) {
+ fprintf(ttyout, "%swith authorization",
+ leading);
+ leading = ", ";
+ hasleading++;
+ }
+ fprintf(fin, "Authorization: %s\r\n", wwwauth);
+ }
+ if (proxyauth) {
+ if (verbose) {
+ fprintf(ttyout,
+ "%swith proxy authorization", leading);
+ leading = ", ";
+ hasleading++;
+ }
+ fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth);
+ }
+ if (verbose && hasleading)
+ fputs(")\n", ttyout);
+ fprintf(fin, "\r\n");
+ if (fflush(fin) == EOF) {
+ warn("Writing HTTP request");
+ goto cleanup_fetch_url;
+ }
+
+ /* Read the response */
+ if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) {
+ warn("Receiving HTTP reply");
+ goto cleanup_fetch_url;
+ }
+ while (len > 0 && (ISLWS(buf[len-1])))
+ buf[--len] = '\0';
+ if (debug)
+ fprintf(ttyout, "received `%s'\n", buf);
+
+ /* Determine HTTP response code */
+ cp = strchr(buf, ' ');
+ if (cp == NULL)
+ goto improper;
+ else
+ cp++;
+ hcode = strtol(cp, &ep, 10);
+ if (*ep != '\0' && !isspace((unsigned char)*ep))
+ goto improper;
+ message = xstrdup(cp);
+
+ /* Read the rest of the header. */
+ while (1) {
+ FREEPTR(buf);
+ if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0))
+ == NULL) {
+ warn("Receiving HTTP reply");
+ goto cleanup_fetch_url;
+ }
+ while (len > 0 && (ISLWS(buf[len-1])))
+ buf[--len] = '\0';
+ if (len == 0)
+ break;
+ if (debug)
+ fprintf(ttyout, "received `%s'\n", buf);
+
+ /*
+ * Look for some headers
+ */
+
+ cp = buf;
+
+ if (match_token(&cp, "Content-Length:")) {
+ filesize = STRTOLL(cp, &ep, 10);
+ if (filesize < 0 || *ep != '\0')
+ goto improper;
+ if (debug)
+ fprintf(ttyout,
+ "parsed len as: " LLF "\n",
+ (LLT)filesize);
+
+ } else if (match_token(&cp, "Content-Range:")) {
+ if (! match_token(&cp, "bytes"))
+ goto improper;
+
+ if (*cp == '*')
+ cp++;
+ else {
+ rangestart = STRTOLL(cp, &ep, 10);
+ if (rangestart < 0 || *ep != '-')
+ goto improper;
+ cp = ep + 1;
+ rangeend = STRTOLL(cp, &ep, 10);
+ if (rangeend < 0 || rangeend < rangestart)
+ goto improper;
+ cp = ep;
+ }
+ if (*cp != '/')
+ goto improper;
+ cp++;
+ if (*cp == '*')
+ cp++;
+ else {
+ entitylen = STRTOLL(cp, &ep, 10);
+ if (entitylen < 0)
+ goto improper;
+ cp = ep;
+ }
+ if (*cp != '\0')
+ goto improper;
+
+ if (debug) {
+ fprintf(ttyout, "parsed range as: ");
+ if (rangestart == -1)
+ fprintf(ttyout, "*");
+ else
+ fprintf(ttyout, LLF "-" LLF,
+ (LLT)rangestart,
+ (LLT)rangeend);
+ fprintf(ttyout, "/" LLF "\n", (LLT)entitylen);
+ }
+ if (! restart_point) {
+ warnx(
+ "Received unexpected Content-Range header");
+ goto cleanup_fetch_url;
+ }
+
+ } else if (match_token(&cp, "Last-Modified:")) {
+ struct tm parsed;
+ char *t;
+
+ /* RFC 1123 */
+ if ((t = strptime(cp,
+ "%a, %d %b %Y %H:%M:%S GMT",
+ &parsed))
+ /* RFC 850 */
+ || (t = strptime(cp,
+ "%a, %d-%b-%y %H:%M:%S GMT",
+ &parsed))
+ /* asctime */
+ || (t = strptime(cp,
+ "%a, %b %d %H:%M:%S %Y",
+ &parsed))) {
+ parsed.tm_isdst = -1;
+ if (*t == '\0')
+ mtime = timegm(&parsed);
+ if (debug && mtime != -1) {
+ fprintf(ttyout,
+ "parsed date as: %s",
+ ctime(&mtime));
+ }
+ }
+
+ } else if (match_token(&cp, "Location:")) {
+ location = xstrdup(cp);
+ if (debug)
+ fprintf(ttyout,
+ "parsed location as `%s'\n", cp);
+
+ } else if (match_token(&cp, "Transfer-Encoding:")) {
+ if (match_token(&cp, "binary")) {
+ warnx(
+ "Bogus transfer encoding - `binary' (fetching anyway)");
+ continue;
+ }
+ if (! (token = match_token(&cp, "chunked"))) {
+ warnx(
+ "Unsupported transfer encoding - `%s'",
+ token);
+ goto cleanup_fetch_url;
+ }
+ ischunked++;
+ if (debug)
+ fprintf(ttyout,
+ "using chunked encoding\n");
+
+ } else if (match_token(&cp, "Proxy-Authenticate:")
+ || match_token(&cp, "WWW-Authenticate:")) {
+ if (! (token = match_token(&cp, "Basic"))) {
+ if (debug)
+ fprintf(ttyout,
+ "skipping unknown auth scheme `%s'\n",
+ token);
+ continue;
+ }
+ FREEPTR(auth);
+ auth = xstrdup(token);
+ if (debug)
+ fprintf(ttyout,
+ "parsed auth as `%s'\n", cp);
+ }
+
+ }
+ /* finished parsing header */
+ FREEPTR(buf);
+
+ switch (hcode) {
+ case 200:
+ break;
+ case 206:
+ if (! restart_point) {
+ warnx("Not expecting partial content header");
+ goto cleanup_fetch_url;
+ }
+ break;
+ case 300:
+ case 301:
+ case 302:
+ case 303:
+ case 305:
+ if (EMPTYSTRING(location)) {
+ warnx(
+ "No redirection Location provided by server");
+ goto cleanup_fetch_url;
+ }
+ if (redirect_loop++ > 5) {
+ warnx("Too many redirections requested");
+ goto cleanup_fetch_url;
+ }
+ if (hcode == 305) {
+ if (verbose)
+ fprintf(ttyout, "Redirected via %s\n",
+ location);
+ rval = fetch_url(url, location,
+ proxyauth, wwwauth);
+ } else {
+ if (verbose)
+ fprintf(ttyout, "Redirected to %s\n",
+ location);
+ rval = go_fetch(location);
+ }
+ goto cleanup_fetch_url;
+#ifndef NO_AUTH
+ case 401:
+ case 407:
+ {
+ char **authp;
+ char *auser, *apass;
+
+ if (hcode == 401) {
+ authp = &wwwauth;
+ auser = user;
+ apass = pass;
+ } else {
+ authp = &proxyauth;
+ auser = puser;
+ apass = ppass;
+ }
+ if (verbose || *authp == NULL ||
+ auser == NULL || apass == NULL)
+ fprintf(ttyout, "%s\n", message);
+ if (EMPTYSTRING(auth)) {
+ warnx(
+ "No authentication challenge provided by server");
+ goto cleanup_fetch_url;
+ }
+ if (*authp != NULL) {
+ char reply[10];
+
+ fprintf(ttyout,
+ "Authorization failed. Retry (y/n)? ");
+ if (fgets(reply, sizeof(reply), stdin)
+ == NULL) {
+ clearerr(stdin);
+ goto cleanup_fetch_url;
+ }
+ if (tolower((unsigned char)reply[0]) != 'y')
+ goto cleanup_fetch_url;
+ auser = NULL;
+ apass = NULL;
+ }
+ if (auth_url(auth, authp, auser, apass) == 0) {
+ rval = fetch_url(url, proxyenv,
+ proxyauth, wwwauth);
+ memset(*authp, 0, strlen(*authp));
+ FREEPTR(*authp);
+ }
+ goto cleanup_fetch_url;
+ }
+#endif
+ default:
+ if (message)
+ warnx("Error retrieving file - `%s'", message);
+ else
+ warnx("Unknown error retrieving file");
+ goto cleanup_fetch_url;
+ }
+ } /* end of ftp:// or http:// specific setup */
+
+ /* Open the output file. */
+ if (strcmp(savefile, "-") == 0) {
+ fout = stdout;
+ } else if (*savefile == '|') {
+ oldintp = xsignal(SIGPIPE, SIG_IGN);
+ fout = popen(savefile + 1, "w");
+ if (fout == NULL) {
+ warn("Can't run `%s'", savefile + 1);
+ goto cleanup_fetch_url;
+ }
+ closefunc = pclose;
+ } else {
+ if ((rangeend != -1 && rangeend <= restart_point) ||
+ (rangestart == -1 && filesize != -1 && filesize <= restart_point)) {
+ /* already done */
+ if (verbose)
+ fprintf(ttyout, "already done\n");
+ rval = 0;
+ goto cleanup_fetch_url;
+ }
+ if (restart_point && rangestart != -1) {
+ if (entitylen != -1)
+ filesize = entitylen;
+ if (rangestart != restart_point) {
+ warnx(
+ "Size of `%s' differs from save file `%s'",
+ url, savefile);
+ goto cleanup_fetch_url;
+ }
+ fout = fopen(savefile, "a");
+ } else
+ fout = fopen(savefile, "w");
+ if (fout == NULL) {
+ warn("Can't open `%s'", savefile);
+ goto cleanup_fetch_url;
+ }
+ closefunc = fclose;
+ }
+
+ /* Trap signals */
+ if (sigsetjmp(httpabort, 1))
+ goto cleanup_fetch_url;
+ (void)xsignal(SIGQUIT, psummary);
+ oldintr = xsignal(SIGINT, aborthttp);
+
+ if (rcvbuf_size > bufsize) {
+ if (xferbuf)
+ (void)free(xferbuf);
+ bufsize = rcvbuf_size;
+ xferbuf = xmalloc(bufsize);
+ }
+
+ bytes = 0;
+ hashbytes = mark;
+ progressmeter(-1);
+
+ /* Finally, suck down the file. */
+ do {
+ long chunksize;
+
+ chunksize = 0;
+ /* read chunksize */
+ if (ischunked) {
+ if (fgets(xferbuf, bufsize, fin) == NULL) {
+ warnx("Unexpected EOF reading chunksize");
+ goto cleanup_fetch_url;
+ }
+ chunksize = strtol(xferbuf, &ep, 16);
+
+ /*
+ * XXX: Work around bug in Apache 1.3.9 and
+ * 1.3.11, which incorrectly put trailing
+ * space after the chunksize.
+ */
+ while (*ep == ' ')
+ ep++;
+
+ if (strcmp(ep, "\r\n") != 0) {
+ warnx("Unexpected data following chunksize");
+ goto cleanup_fetch_url;
+ }
+ if (debug)
+ fprintf(ttyout, "got chunksize of " LLF "\n",
+ (LLT)chunksize);
+ if (chunksize == 0)
+ break;
+ }
+ /* transfer file or chunk */
+ while (1) {
+ struct timeval then, now, td;
+ off_t bufrem;
+
+ if (rate_get)
+ (void)gettimeofday(&then, NULL);
+ bufrem = rate_get ? rate_get : bufsize;
+ if (ischunked)
+ bufrem = MIN(chunksize, bufrem);
+ while (bufrem > 0) {
+ len = fread(xferbuf, sizeof(char),
+ MIN(bufsize, bufrem), fin);
+ if (len <= 0)
+ goto chunkdone;
+ bytes += len;
+ bufrem -= len;
+ if (fwrite(xferbuf, sizeof(char), len, fout)
+ != len) {
+ warn("Writing `%s'", savefile);
+ goto cleanup_fetch_url;
+ }
+ if (hash && !progress) {
+ while (bytes >= hashbytes) {
+ (void)putc('#', ttyout);
+ hashbytes += mark;
+ }
+ (void)fflush(ttyout);
+ }
+ if (ischunked) {
+ chunksize -= len;
+ if (chunksize <= 0)
+ break;
+ }
+ }
+ if (rate_get) {
+ while (1) {
+ (void)gettimeofday(&now, NULL);
+ timersub(&now, &then, &td);
+ if (td.tv_sec > 0)
+ break;
+ usleep(1000000 - td.tv_usec);
+ }
+ }
+ if (ischunked && chunksize <= 0)
+ break;
+ }
+ /* read CRLF after chunk*/
+ chunkdone:
+ if (ischunked) {
+ if (fgets(xferbuf, bufsize, fin) == NULL)
+ break;
+ if (strcmp(xferbuf, "\r\n") != 0) {
+ warnx("Unexpected data following chunk");
+ goto cleanup_fetch_url;
+ }
+ }
+ } while (ischunked);
+ if (hash && !progress && bytes > 0) {
+ if (bytes < mark)
+ (void)putc('#', ttyout);
+ (void)putc('\n', ttyout);
+ }
+ if (ferror(fin)) {
+ warn("Reading file");
+ goto cleanup_fetch_url;
+ }
+ progressmeter(1);
+ (void)fflush(fout);
+ if (closefunc == fclose && mtime != -1) {
+ struct timeval tval[2];
+
+ (void)gettimeofday(&tval[0], NULL);
+ tval[1].tv_sec = mtime;
+ tval[1].tv_usec = 0;
+ (*closefunc)(fout);
+ fout = NULL;
+
+ if (utimes(savefile, tval) == -1) {
+ fprintf(ttyout,
+ "Can't change modification time to %s",
+ asctime(localtime(&mtime)));
+ }
+ }
+ if (bytes > 0)
+ ptransfer(0);
+ bytes = 0;
+
+ rval = 0;
+ goto cleanup_fetch_url;
+
+ improper:
+ warnx("Improper response from `%s'", host);
+
+ cleanup_fetch_url:
+ if (oldintr)
+ (void)xsignal(SIGINT, oldintr);
+ if (oldintp)
+ (void)xsignal(SIGPIPE, oldintp);
+ if (fin != NULL)
+ fclose(fin);
+ else if (s != -1)
+ close(s);
+ if (closefunc != NULL && fout != NULL)
+ (*closefunc)(fout);
+ if (res0)
+ freeaddrinfo(res0);
+ FREEPTR(savefile);
+ FREEPTR(user);
+ FREEPTR(pass);
+ FREEPTR(host);
+ FREEPTR(port);
+ FREEPTR(path);
+ FREEPTR(decodedpath);
+ FREEPTR(puser);
+ FREEPTR(ppass);
+ FREEPTR(buf);
+ FREEPTR(auth);
+ FREEPTR(location);
+ FREEPTR(message);
+ return (rval);
+}
+
+/*
+ * Abort a HTTP retrieval
+ */
+void
+aborthttp(int notused)
+{
+ char msgbuf[100];
+ int len;
+
+ sigint_raised = 1;
+ alarmtimer(0);
+ len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf));
+ write(fileno(ttyout), msgbuf, len);
+ siglongjmp(httpabort, 1);
+}
+
+/*
+ * Retrieve ftp URL or classic ftp argument using FTP.
+ * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
+ * is still open (e.g, ftp xfer with trailing /)
+ */
+static int
+fetch_ftp(const char *url)
+{
+ char *cp, *xargv[5], rempath[MAXPATHLEN];
+ char *host, *path, *dir, *file, *user, *pass;
+ char *port;
+ int dirhasglob, filehasglob, oautologin, rval, type, xargc;
+ in_port_t portnum;
+ url_t urltype;
+
+ host = path = dir = file = user = pass = NULL;
+ port = NULL;
+ rval = 1;
+ type = TYPE_I;
+
+ if (STRNEQUAL(url, FTP_URL)) {
+ if ((parse_url(url, "URL", &urltype, &user, &pass,
+ &host, &port, &portnum, &path) == -1) ||
+ (user != NULL && *user == '\0') ||
+ EMPTYSTRING(host)) {
+ warnx("Invalid URL `%s'", url);
+ goto cleanup_fetch_ftp;
+ }
+ /*
+ * Note: Don't url_decode(path) here. We need to keep the
+ * distinction between "/" and "%2F" until later.
+ */
+
+ /* check for trailing ';type=[aid]' */
+ if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) {
+ if (strcasecmp(cp, ";type=a") == 0)
+ type = TYPE_A;
+ else if (strcasecmp(cp, ";type=i") == 0)
+ type = TYPE_I;
+ else if (strcasecmp(cp, ";type=d") == 0) {
+ warnx(
+ "Directory listing via a URL is not supported");
+ goto cleanup_fetch_ftp;
+ } else {
+ warnx("Invalid suffix `%s' in URL `%s'", cp,
+ url);
+ goto cleanup_fetch_ftp;
+ }
+ *cp = 0;
+ }
+ } else { /* classic style `[user@]host:[file]' */
+ urltype = CLASSIC_URL_T;
+ host = xstrdup(url);
+ cp = strchr(host, '@');
+ if (cp != NULL) {
+ *cp = '\0';
+ user = host;
+ anonftp = 0; /* disable anonftp */
+ host = xstrdup(cp + 1);
+ }
+ cp = strchr(host, ':');
+ if (cp != NULL) {
+ *cp = '\0';
+ path = xstrdup(cp + 1);
+ }
+ }
+ if (EMPTYSTRING(host))
+ goto cleanup_fetch_ftp;
+
+ /* Extract the file and (if present) directory name. */
+ dir = path;
+ if (! EMPTYSTRING(dir)) {
+ /*
+ * If we are dealing with classic `[user@]host:[path]' syntax,
+ * then a path of the form `/file' (resulting from input of the
+ * form `host:/file') means that we should do "CWD /" before
+ * retrieving the file. So we set dir="/" and file="file".
+ *
+ * But if we are dealing with URLs like `ftp://host/path' then
+ * a path of the form `/file' (resulting from a URL of the form
+ * `ftp://host//file') means that we should do `CWD ' (with an
+ * empty argument) before retrieving the file. So we set
+ * dir="" and file="file".
+ *
+ * If the path does not contain / at all, we set dir=NULL.
+ * (We get a path without any slashes if we are dealing with
+ * classic `[user@]host:[file]' or URL `ftp://host/file'.)
+ *
+ * In all other cases, we set dir to a string that does not
+ * include the final '/' that separates the dir part from the
+ * file part of the path. (This will be the empty string if
+ * and only if we are dealing with a path of the form `/file'
+ * resulting from an URL of the form `ftp://host//file'.)
+ */
+ cp = strrchr(dir, '/');
+ if (cp == dir && urltype == CLASSIC_URL_T) {
+ file = cp + 1;
+ dir = "/";
+ } else if (cp != NULL) {
+ *cp++ = '\0';
+ file = cp;
+ } else {
+ file = dir;
+ dir = NULL;
+ }
+ } else
+ dir = NULL;
+ if (urltype == FTP_URL_T && file != NULL) {
+ url_decode(file);
+ /* but still don't url_decode(dir) */
+ }
+ if (debug)
+ fprintf(ttyout,
+ "fetch_ftp: user `%s' pass `%s' host %s port %s "
+ "path `%s' dir `%s' file `%s'\n",
+ user ? user : "<null>", pass ? pass : "<null>",
+ host ? host : "<null>", port ? port : "<null>",
+ path ? path : "<null>",
+ dir ? dir : "<null>", file ? file : "<null>");
+
+ dirhasglob = filehasglob = 0;
+ if (doglob && urltype == CLASSIC_URL_T) {
+ if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL)
+ dirhasglob = 1;
+ if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL)
+ filehasglob = 1;
+ }
+
+ /* Set up the connection */
+ if (connected)
+ disconnect(0, NULL);
+ xargv[0] = (char *)getprogname(); /* XXX discards const */
+ xargv[1] = host;
+ xargv[2] = NULL;
+ xargc = 2;
+ if (port) {
+ xargv[2] = port;
+ xargv[3] = NULL;
+ xargc = 3;
+ }
+ oautologin = autologin;
+ /* don't autologin in setpeer(), use ftp_login() below */
+ autologin = 0;
+ setpeer(xargc, xargv);
+ autologin = oautologin;
+ if ((connected == 0) ||
+ (connected == 1 && !ftp_login(host, user, pass))) {
+ warnx("Can't connect or login to host `%s'", host);
+ goto cleanup_fetch_ftp;
+ }
+
+ switch (type) {
+ case TYPE_A:
+ setascii(1, xargv);
+ break;
+ case TYPE_I:
+ setbinary(1, xargv);
+ break;
+ default:
+ errx(1, "fetch_ftp: unknown transfer type %d", type);
+ }
+
+ /*
+ * Change directories, if necessary.
+ *
+ * Note: don't use EMPTYSTRING(dir) below, because
+ * dir=="" means something different from dir==NULL.
+ */
+ if (dir != NULL && !dirhasglob) {
+ char *nextpart;
+
+ /*
+ * If we are dealing with a classic `[user@]host:[path]'
+ * (urltype is CLASSIC_URL_T) then we have a raw directory
+ * name (not encoded in any way) and we can change
+ * directories in one step.
+ *
+ * If we are dealing with an `ftp://host/path' URL
+ * (urltype is FTP_URL_T), then RFC 1738 says we need to
+ * send a separate CWD command for each unescaped "/"
+ * in the path, and we have to interpret %hex escaping
+ * *after* we find the slashes. It's possible to get
+ * empty components here, (from multiple adjacent
+ * slashes in the path) and RFC 1738 says that we should
+ * still do `CWD ' (with a null argument) in such cases.
+ *
+ * Many ftp servers don't support `CWD ', so if there's an
+ * error performing that command, bail out with a descriptive
+ * message.
+ *
+ * Examples:
+ *
+ * host: dir="", urltype=CLASSIC_URL_T
+ * logged in (to default directory)
+ * host:file dir=NULL, urltype=CLASSIC_URL_T
+ * "RETR file"
+ * host:dir/ dir="dir", urltype=CLASSIC_URL_T
+ * "CWD dir", logged in
+ * ftp://host/ dir="", urltype=FTP_URL_T
+ * logged in (to default directory)
+ * ftp://host/dir/ dir="dir", urltype=FTP_URL_T
+ * "CWD dir", logged in
+ * ftp://host/file dir=NULL, urltype=FTP_URL_T
+ * "RETR file"
+ * ftp://host//file dir="", urltype=FTP_URL_T
+ * "CWD ", "RETR file"
+ * host:/file dir="/", urltype=CLASSIC_URL_T
+ * "CWD /", "RETR file"
+ * ftp://host///file dir="/", urltype=FTP_URL_T
+ * "CWD ", "CWD ", "RETR file"
+ * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T
+ * "CWD /", "RETR file"
+ * ftp://host/foo/file dir="foo", urltype=FTP_URL_T
+ * "CWD foo", "RETR file"
+ * ftp://host/foo/bar/file dir="foo/bar"
+ * "CWD foo", "CWD bar", "RETR file"
+ * ftp://host//foo/bar/file dir="/foo/bar"
+ * "CWD ", "CWD foo", "CWD bar", "RETR file"
+ * ftp://host/foo//bar/file dir="foo//bar"
+ * "CWD foo", "CWD ", "CWD bar", "RETR file"
+ * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar"
+ * "CWD /", "CWD foo", "CWD bar", "RETR file"
+ * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar"
+ * "CWD /foo", "CWD bar", "RETR file"
+ * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar"
+ * "CWD /foo/bar", "RETR file"
+ * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL
+ * "RETR /foo/bar/file"
+ *
+ * Note that we don't need `dir' after this point.
+ */
+ do {
+ if (urltype == FTP_URL_T) {
+ nextpart = strchr(dir, '/');
+ if (nextpart) {
+ *nextpart = '\0';
+ nextpart++;
+ }
+ url_decode(dir);
+ } else
+ nextpart = NULL;
+ if (debug)
+ fprintf(ttyout, "dir `%s', nextpart `%s'\n",
+ dir ? dir : "<null>",
+ nextpart ? nextpart : "<null>");
+ if (urltype == FTP_URL_T || *dir != '\0') {
+ xargv[0] = "cd";
+ xargv[1] = dir;
+ xargv[2] = NULL;
+ dirchange = 0;
+ cd(2, xargv);
+ if (! dirchange) {
+ if (*dir == '\0' && code == 500)
+ fprintf(stderr,
+"\n"
+"ftp: The `CWD ' command (without a directory), which is required by\n"
+" RFC 1738 to support the empty directory in the URL pathname (`//'),\n"
+" conflicts with the server's conformance to RFC 959.\n"
+" Try the same URL without the `//' in the URL pathname.\n"
+"\n");
+ goto cleanup_fetch_ftp;
+ }
+ }
+ dir = nextpart;
+ } while (dir != NULL);
+ }
+
+ if (EMPTYSTRING(file)) {
+ rval = -1;
+ goto cleanup_fetch_ftp;
+ }
+
+ if (dirhasglob) {
+ (void)strlcpy(rempath, dir, sizeof(rempath));
+ (void)strlcat(rempath, "/", sizeof(rempath));
+ (void)strlcat(rempath, file, sizeof(rempath));
+ file = rempath;
+ }
+
+ /* Fetch the file(s). */
+ xargc = 2;
+ xargv[0] = "get";
+ xargv[1] = file;
+ xargv[2] = NULL;
+ if (dirhasglob || filehasglob) {
+ int ointeractive;
+
+ ointeractive = interactive;
+ interactive = 0;
+ if (restartautofetch)
+ xargv[0] = "mreget";
+ else
+ xargv[0] = "mget";
+ mget(xargc, xargv);
+ interactive = ointeractive;
+ } else {
+ if (outfile == NULL) {
+ cp = strrchr(file, '/'); /* find savefile */
+ if (cp != NULL)
+ outfile = cp + 1;
+ else
+ outfile = file;
+ }
+ xargv[2] = (char *)outfile;
+ xargv[3] = NULL;
+ xargc++;
+ if (restartautofetch)
+ reget(xargc, xargv);
+ else
+ get(xargc, xargv);
+ }
+
+ if ((code / 100) == COMPLETE)
+ rval = 0;
+
+ cleanup_fetch_ftp:
+ FREEPTR(host);
+ FREEPTR(path);
+ FREEPTR(user);
+ FREEPTR(pass);
+ return (rval);
+}
+
+/*
+ * Retrieve the given file to outfile.
+ * Supports arguments of the form:
+ * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else
+ * call fetch_ftp()
+ * "http://host/path" call fetch_url() to use HTTP
+ * "file:///path" call fetch_url() to copy
+ * "about:..." print a message
+ *
+ * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
+ * is still open (e.g, ftp xfer with trailing /)
+ */
+static int
+go_fetch(const char *url)
+{
+ char *proxy;
+
+#ifndef NO_ABOUT
+ /*
+ * Check for about:*
+ */
+ if (STRNEQUAL(url, ABOUT_URL)) {
+ url += sizeof(ABOUT_URL) -1;
+ if (strcasecmp(url, "ftp") == 0 ||
+ strcasecmp(url, "tnftp") == 0) {
+ fputs(
+"This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n"
+"for the NetBSD project. Execute `man ftp' for more details.\n", ttyout);
+ } else if (strcasecmp(url, "lukem") == 0) {
+ fputs(
+"Luke Mewburn is the author of most of the enhancements in this ftp client.\n"
+"Please email feedback to <lukem@NetBSD.org>.\n", ttyout);
+ } else if (strcasecmp(url, "netbsd") == 0) {
+ fputs(
+"NetBSD is a freely available and redistributable UNIX-like operating system.\n"
+"For more information, see http://www.NetBSD.org/\n", ttyout);
+ } else if (strcasecmp(url, "version") == 0) {
+ fprintf(ttyout, "Version: %s %s%s\n",
+ FTP_PRODUCT, FTP_VERSION,
+#ifdef INET6
+ ""
+#else
+ " (-IPv6)"
+#endif
+ );
+ } else {
+ fprintf(ttyout, "`%s' is an interesting topic.\n", url);
+ }
+ fputs("\n", ttyout);
+ return (0);
+ }
+#endif
+
+ /*
+ * Check for file:// and http:// URLs.
+ */
+ if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL))
+ return (fetch_url(url, NULL, NULL, NULL));
+
+ /*
+ * Try FTP URL-style and host:file arguments next.
+ * If ftpproxy is set with an FTP URL, use fetch_url()
+ * Othewise, use fetch_ftp().
+ */
+ proxy = getoptionvalue("ftp_proxy");
+ if (!EMPTYSTRING(proxy) && STRNEQUAL(url, FTP_URL))
+ return (fetch_url(url, NULL, NULL, NULL));
+
+ return (fetch_ftp(url));
+}
+
+/*
+ * Retrieve multiple files from the command line,
+ * calling go_fetch() for each file.
+ *
+ * If an ftp path has a trailing "/", the path will be cd-ed into and
+ * the connection remains open, and the function will return -1
+ * (to indicate the connection is alive).
+ * If an error occurs the return value will be the offset+1 in
+ * argv[] of the file that caused a problem (i.e, argv[x]
+ * returns x+1)
+ * Otherwise, 0 is returned if all files retrieved successfully.
+ */
+int
+auto_fetch(int argc, char *argv[])
+{
+ volatile int argpos;
+ int rval;
+
+ argpos = 0;
+
+ if (sigsetjmp(toplevel, 1)) {
+ if (connected)
+ disconnect(0, NULL);
+ if (rval > 0)
+ rval = argpos + 1;
+ return (rval);
+ }
+ (void)xsignal(SIGINT, intr);
+ (void)xsignal(SIGPIPE, lostpeer);
+
+ /*
+ * Loop through as long as there's files to fetch.
+ */
+ for (rval = 0; (rval == 0) && (argpos < argc); argpos++) {
+ if (strchr(argv[argpos], ':') == NULL)
+ break;
+ redirect_loop = 0;
+ if (!anonftp)
+ anonftp = 2; /* Handle "automatic" transfers. */
+ rval = go_fetch(argv[argpos]);
+ if (outfile != NULL && strcmp(outfile, "-") != 0
+ && outfile[0] != '|')
+ outfile = NULL;
+ if (rval > 0)
+ rval = argpos + 1;
+ }
+
+ if (connected && rval != -1)
+ disconnect(0, NULL);
+ return (rval);
+}
+
+
+int
+auto_put(int argc, char **argv, const char *uploadserver)
+{
+ char *uargv[4], *path, *pathsep;
+ int uargc, rval, len;
+
+ uargc = 0;
+ uargv[uargc++] = "mput";
+ uargv[uargc++] = argv[0];
+ uargv[2] = uargv[3] = NULL;
+ pathsep = NULL;
+ rval = 1;
+
+ if (debug)
+ fprintf(ttyout, "auto_put: target `%s'\n", uploadserver);
+
+ path = xstrdup(uploadserver);
+ len = strlen(path);
+ if (path[len - 1] != '/' && path[len - 1] != ':') {
+ /*
+ * make sure we always pass a directory to auto_fetch
+ */
+ if (argc > 1) { /* more than one file to upload */
+ int len;
+
+ len = strlen(uploadserver) + 2; /* path + "/" + "\0" */
+ free(path);
+ path = (char *)xmalloc(len);
+ (void)strlcpy(path, uploadserver, len);
+ (void)strlcat(path, "/", len);
+ } else { /* single file to upload */
+ uargv[0] = "put";
+ pathsep = strrchr(path, '/');
+ if (pathsep == NULL) {
+ pathsep = strrchr(path, ':');
+ if (pathsep == NULL) {
+ warnx("Invalid URL `%s'", path);
+ goto cleanup_auto_put;
+ }
+ pathsep++;
+ uargv[2] = xstrdup(pathsep);
+ pathsep[0] = '/';
+ } else
+ uargv[2] = xstrdup(pathsep + 1);
+ pathsep[1] = '\0';
+ uargc++;
+ }
+ }
+ if (debug)
+ fprintf(ttyout, "auto_put: URL `%s' argv[2] `%s'\n",
+ path, uargv[2] ? uargv[2] : "<null>");
+
+ /* connect and cwd */
+ rval = auto_fetch(1, &path);
+ free(path);
+ if(rval >= 0)
+ goto cleanup_auto_put;
+
+ /* XXX : is this the best way? */
+ if (uargc == 3) {
+ uargv[1] = argv[0];
+ put(uargc, uargv);
+ goto cleanup_auto_put;
+ }
+
+ for(; argv[0] != NULL; argv++) {
+ uargv[1] = argv[0];
+ mput(uargc, uargv);
+ }
+ rval = 0;
+
+ cleanup_auto_put:
+ FREEPTR(uargv[2]);
+ return (rval);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-08 13:51:23 +0000