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httpfs2.c
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httpfs2.c
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/*
* HTTPFS: import a file from a web server to local file system
* the main use is, to mount an iso on a web server with loop device
*
* depends on:
* FUSE: Filesystem in Userspace
* Copyright (C) 2001-2007 Miklos Szeredi <[email protected]>
*
* This program can be distributed under the terms of the GNU GPL.
*
*/
/*
* (c) 2006 hmb marionraven at users.sourceforge.net
*
*/
/*
* Modified to work with fuse 2.7.
* Added keepalive
* The passthru functionality removed to simplify the code.
* (c) 2008-2012,2016 Michal Suchanek <[email protected]>
*
*/
#define FUSE_USE_VERSION 26
#include <fuse_lowlevel.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <assert.h>
#include <ctype.h>
#include <sys/stat.h>
#include <sys/dir.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <time.h>
#include <stddef.h>
#include <inttypes.h>
#ifdef USE_THREAD
#include <pthread.h>
static pthread_key_t url_key;
#define FUSE_LOOP fuse_session_loop_mt
#else
#define FUSE_LOOP fuse_session_loop
#endif
#ifdef USE_SSL
#include <gnutls/gnutls.h>
#include <gnutls/x509.h>
#endif
/*
* ECONNRESET happens with some dodgy servers so may need to handle that.
* Allow for building without ECONNRESET in case it is not defined.
*/
#ifdef ECONNRESET
#define RETRY_ON_RESET
#endif
#define TIMEOUT 30
#define CONSOLE "/dev/console"
#define HEADER_SIZE 1024
#define MAX_REQUEST (32*1024)
#define MAX_REDIRECTS 32
#define TNAME_LEN 13
#define RESET_RETRIES 8
#define VERSION "0.1.5 \"The Message\""
enum sock_state {
SOCK_CLOSED,
SOCK_OPEN,
SOCK_KEEPALIVE,
};
enum url_flags {
URL_DUP,
URL_SAVE,
URL_DROP,
};
typedef struct url {
int proto;
long timeout;
char * url;
char * host; /*hostname*/
int port;
char * path; /*get path*/
char * name; /*file name*/
char * filename; /*content file name*/
int filename_from_header; /* take filename from HTTP header */
#ifdef USE_AUTH
char * auth; /*encoded auth data*/
#endif
#ifdef RETRY_ON_RESET
long retry_reset; /*retry reset connections*/
long resets;
#endif
int sockfd;
enum sock_state sock_type;
int redirected;
int redirect_followed;
int redirect_depth;
#ifdef USE_SSL
long ssl_log_level;
unsigned md5;
unsigned md2;
int ssl_initialized;
int ssl_connected;
gnutls_certificate_credentials_t sc;
gnutls_session_t ss;
const char * cafile;
#endif
char * req_buf;
size_t req_buf_size;
off_t file_size;
time_t last_modified;
char tname[TNAME_LEN + 1];
} struct_url;
static struct_url main_url;
static char* argv0;
static off_t get_stat(struct_url*, struct stat * stbuf);
static ssize_t get_data(struct_url*, off_t start, size_t size);
static int open_client_socket(struct_url *url);
static int close_client_socket(struct_url *url);
static int close_client_force(struct_url *url);
static struct_url * thread_setup(void);
static void destroy_url_copy(void *);
/* Protocol symbols. */
#define PROTO_HTTP 0
#ifdef USE_SSL
#define PROTO_HTTPS 1
#endif
#ifdef USE_AUTH
static char b64_encode_table[64] = {
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', /* 0-7 */
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', /* 8-15 */
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', /* 16-23 */
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', /* 24-31 */
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', /* 32-39 */
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', /* 40-47 */
'w', 'x', 'y', 'z', '0', '1', '2', '3', /* 48-55 */
'4', '5', '6', '7', '8', '9', '+', '/' /* 56-63 */
};
/* Do base-64 encoding on a hunk of bytes. Return pointer to the
** bytes generated. Base-64 encoding takes up 4/3 the space of the original,
** plus a bit for end-padding. 3/2+5 gives a safe margin.
*/
static char * b64_encode(unsigned const char* ptr, long len) {
char * space;
int ptr_idx;
int c = 0;
int d = 0;
int space_idx = 0;
int phase = 0;
/*FIXME calculate the occupied space properly*/
size_t size = ((size_t)len * 3) /2 + 5;
space = malloc(size+1);
space[size] = 0;
for (ptr_idx = 0; ptr_idx < len; ++ptr_idx) {
switch (phase++) {
case 0:
c = ptr[ptr_idx] >> 2;
d = (ptr[ptr_idx] & 0x3) << 4;
break;
case 1:
c = d | (ptr[ptr_idx] >> 4);
d = (ptr[ptr_idx] & 0xf) << 2;
break;
case 2:
c = d | (ptr[ptr_idx] >> 6);
if (space_idx < size) space[space_idx++] = b64_encode_table[c];
c = ptr[ptr_idx] & 0x3f;
break;
}
space[space_idx++] = b64_encode_table[c];
if (space_idx == size) return space;
phase %= 3;
}
if (phase != 0) {
space[space_idx++] = b64_encode_table[d];
if (space_idx == size) return space;
/* Pad with ='s. */
while (phase++ > 0) {
space[space_idx++] = '=';
if (space_idx == size) return space;
phase %= 3;
}
}
return space;
}
#endif /* USE_AUTH */
/*
* The FUSE operations originally ripped from the hello_ll sample.
*/
static int httpfs_stat(fuse_ino_t ino, struct stat *stbuf)
{
stbuf->st_ino = ino;
switch (ino) {
case 1:
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 2;
break;
case 2: {
struct_url * url = thread_setup();
fprintf(stderr, "%s: %s: stat()\n", argv0, url->tname); /*DEBUG*/
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
return -(get_stat(url, stbuf) < 0);
}
break;
default:
errno = ENOENT;
return -1;
}
return 0;
}
static void httpfs_getattr(fuse_req_t req, fuse_ino_t ino,
struct fuse_file_info *fi)
{
struct stat stbuf;
(void) fi;
memset(&stbuf, 0, sizeof(stbuf));
if (httpfs_stat(ino, &stbuf) < 0)
assert(errno),fuse_reply_err(req, errno);
else
fuse_reply_attr(req, &stbuf, 1.0);
}
static void httpfs_lookup(fuse_req_t req, fuse_ino_t parent, const char *name)
{
struct fuse_entry_param e;
memset(&e, 0, sizeof(e));
e.attr_timeout = 1.0;
e.entry_timeout = 1.0;
if (parent != 1 || strcmp(name, main_url.filename) != 0){
e.ino = 0;
} else {
e.ino = 2;
if(httpfs_stat(e.ino, &e.attr) < 0){
assert(errno);
fuse_reply_err(req, errno);
return;
}
}
fuse_reply_entry(req, &e);
}
struct dirbuf {
char *p;
size_t size;
};
static void dirbuf_add(fuse_req_t req, struct dirbuf *b, const char *name,
fuse_ino_t ino)
{
struct stat stbuf;
size_t oldsize = b->size;
b->size += fuse_add_direntry(req, NULL, 0, name, NULL, 0);
b->p = (char *) realloc(b->p, b->size);
memset(&stbuf, 0, sizeof(stbuf));
stbuf.st_ino = ino;
fuse_add_direntry(req, b->p + oldsize, b->size - oldsize, name, &stbuf,
(off_t) b->size);
}
#define min(x, y) ((x) < (y) ? (x) : (y))
static int reply_buf_limited(fuse_req_t req, const char *buf, size_t bufsize,
off_t off, size_t maxsize)
{
assert(off >= 0);
if (off < bufsize)
return fuse_reply_buf(req, buf + off,
min(bufsize - (size_t)off, maxsize));
else
return fuse_reply_buf(req, NULL, 0);
}
static void httpfs_readdir(fuse_req_t req, fuse_ino_t ino, size_t size,
off_t off, struct fuse_file_info *fi)
{
(void) fi;
if (ino != 1)
fuse_reply_err(req, ENOTDIR);
else {
struct dirbuf b;
memset(&b, 0, sizeof(b));
dirbuf_add(req, &b, ".", 1);
dirbuf_add(req, &b, "..", 1);
dirbuf_add(req, &b, main_url.filename, 2);
reply_buf_limited(req, b.p, b.size, off, size);
free(b.p);
}
}
static void httpfs_open(fuse_req_t req, fuse_ino_t ino,
struct fuse_file_info *fi)
{
if (ino != 2)
fuse_reply_err(req, EISDIR);
else if ((fi->flags & 3) != O_RDONLY)
fuse_reply_err(req, EACCES);
else{
/* direct_io is supposed to allow partial reads. However, setting
* the flag causes read length max at 4096 bytes which leads to
* *many* requests, poor performance, and errors. Some resources
* like TCP ports are recycled too fast for Linux to cope.
*/
//fi->direct_io = 1;
fuse_reply_open(req, fi);
}
}
static void httpfs_read(fuse_req_t req, fuse_ino_t ino, size_t size,
off_t off, struct fuse_file_info *fi)
{
(void) fi;
struct_url * url = thread_setup();
ssize_t res;
assert(ino == 2);
assert(url->file_size >= off);
size=min(size, (size_t)(url->file_size - off));
if(url->file_size == off) {
/* Handling of EOF is not well documented, returning EOF as error
* does not work but this does. */
fuse_reply_buf(req, NULL, 0);
return;
}
/* since we have to return all stuff requested the buffer cannot be
* allocated in advance */
if(url->req_buf
&& ( (url->req_buf_size < size )
|| ( (url->req_buf_size > size )
&& (url->req_buf_size > MAX_REQUEST) ) ) ){
free(url->req_buf);
url->req_buf = 0;
}
if(! url->req_buf){
url->req_buf_size = size;
url->req_buf = malloc(size);
}
fprintf(stderr, "httpfs_read: size: %lld b (%lld kb), off: %lld b (%lld kb)\n", (long long)url->req_buf_size, (long long)(url->req_buf_size/1024), (long long)off, (long long)(off/1024));
if((res = get_data(url, off, size)) < 0){
assert(errno);
fuse_reply_err(req, errno);
}else{
fuse_reply_buf(req, url->req_buf, (size_t)res);
}
}
static struct fuse_lowlevel_ops httpfs_oper = {
.lookup = httpfs_lookup,
.getattr = httpfs_getattr,
.readdir = httpfs_readdir,
.open = httpfs_open,
.read = httpfs_read,
};
/*
* A few utility functions
*/
#ifdef NEED_STRNDUP
static char * strndup(const char * str, size_t n){
if(n > strlen(str)) n = strlen(str);
char * res = malloc(n + 1);
memcpy(res, str, n);
res[n] = 0;
return res;
}
#endif
static int mempref(const char * mem, const char * pref, size_t size, int case_sensitive)
{
/* return true if found */
if (size < strlen(pref)) return 0;
if (case_sensitive)
return ! memcmp(mem, pref, strlen(pref));
else {
int i;
for (i = 0; i < strlen(pref); i++)
/* Unless somebody calling setlocale() behind our back locale should be C. */
/* It is important to not uppercase in languages like Turkish. */
if (tolower(mem[i]) != tolower(pref[i]))
return 0;
return 1;
}
}
#ifdef USE_SSL
static void errno_report(const char * where);
static void ssl_error(ssize_t error, struct_url * url, const char * where);
static void ssl_error_p(ssize_t error, struct_url * url, const char * where, const char * extra);
/* Functions to deal with gnutls_datum_t stolen from gnutls docs.
* The structure does not seem documented otherwise.
*/
static gnutls_datum_t
load_file (const char *file)
{
FILE *f;
gnutls_datum_t loaded_file = { NULL, 0 };
long filelen;
void *ptr;
f = fopen (file, "r");
if (!f)
errno_report(file);
else if (fseek (f, 0, SEEK_END) != 0)
errno_report(file);
else if ((filelen = ftell (f)) < 0)
errno_report(file);
else if (fseek (f, 0, SEEK_SET) != 0)
errno_report(file);
else if (!(ptr = malloc ((size_t) filelen)))
errno_report(file);
else if (fread (ptr, 1, (size_t) filelen, f) < (size_t) filelen)
errno_report(file);
else {
loaded_file.data = ptr;
loaded_file.size = (unsigned int) filelen;
fprintf(stderr, "Loaded '%s' %ld bytes\n", file, filelen);
/* fwrite(ptr, filelen, 1, stderr); */
}
return loaded_file;
}
static void
unload_file (gnutls_datum_t data)
{
free (data.data);
}
/* This function will print some details of the
* given session.
*
* Stolen from the GNUTLS docs.
*/
int
print_ssl_info (gnutls_session_t session)
{
const char *tmp;
gnutls_credentials_type_t cred;
gnutls_kx_algorithm_t kx;
int dhe, ecdh;
dhe = ecdh = 0;
if (!session) {
fprintf(stderr, "No SSL session data.\n");
return 0;
}
/* print the key exchange’s algorithm name
*/
kx = gnutls_kx_get (session);
tmp = gnutls_kx_get_name (kx);
fprintf(stderr, "- Key Exchange: %s\n", tmp);
/* Check the authentication type used and switch
* to the appropriate.
*/
cred = gnutls_auth_get_type (session);
switch (cred)
{
case GNUTLS_CRD_CERTIFICATE:
/* certificate authentication */
/* Check if we have been using ephemeral Diffie-Hellman.
*/
if (kx == GNUTLS_KX_DHE_RSA || kx == GNUTLS_KX_DHE_DSS)
dhe = 1;
#if (GNUTLS_VERSION_MAJOR > 3 )
else if (kx == GNUTLS_KX_ECDHE_RSA || kx == GNUTLS_KX_ECDHE_ECDSA)
ecdh = 1;
#endif
/* cert should have been printed when it was verified */
break;
default:
fprintf(stderr, "Not a x509 sesssion !?!\n");
}
#if (GNUTLS_VERSION_MAJOR > 3 )
/* switch */
if (ecdh != 0)
fprintf(stderr, "- Ephemeral ECDH using curve %s\n",
gnutls_ecc_curve_get_name (gnutls_ecc_curve_get (session)));
else
#endif
if (dhe != 0)
fprintf(stderr, "- Ephemeral DH using prime of %d bits\n",
gnutls_dh_get_prime_bits (session));
/* print the protocol’s name (ie TLS 1.0)
*/
tmp = gnutls_protocol_get_name (gnutls_protocol_get_version (session));
fprintf(stderr, "- Protocol: %s\n", tmp);
/* print the certificate type of the peer.
* ie X.509
*/
tmp =
gnutls_certificate_type_get_name (gnutls_certificate_type_get (session));
fprintf(stderr, "- Certificate Type: %s\n", tmp);
/* print the compression algorithm (if any)
*/
tmp = gnutls_compression_get_name (gnutls_compression_get (session));
fprintf(stderr, "- Compression: %s\n", tmp);
/* print the name of the cipher used.
* ie 3DES.
*/
tmp = gnutls_cipher_get_name (gnutls_cipher_get (session));
fprintf(stderr, "- Cipher: %s\n", tmp);
/* Print the MAC algorithms name.
* ie SHA1
*/
tmp = gnutls_mac_get_name (gnutls_mac_get (session));
fprintf(stderr, "- MAC: %s\n", tmp);
fprintf(stderr, "Note: SSL paramaters may change as new connections are established to the server.\n");
return 0;
}
/* This function will try to verify the peer’s certificate, and
* also check if the hostname matches, and the activation, expiration dates.
*
* Stolen from the gnutls manual.
*/
static int
verify_certificate_callback (gnutls_session_t session)
{
unsigned int status;
const gnutls_datum_t *cert_list;
unsigned int cert_list_size;
int ret;
gnutls_x509_crt_t cert;
gnutls_datum_t data = {0};
struct_url * url = gnutls_session_get_ptr (session);
const char *hostname = url->host;
/* This verification function uses the trusted CAs in the credentials
* structure. So you must have installed one or more CA certificates.
*/
ret = gnutls_certificate_verify_peers2 (session, &status);
if (ret < 0)
{
ssl_error(ret, url, "verify certificate");
return GNUTLS_E_CERTIFICATE_ERROR;
}
if (status & GNUTLS_CERT_INVALID)
fprintf(stderr, "The server certificate is NOT trusted.\n");
if (status & GNUTLS_CERT_INSECURE_ALGORITHM)
fprintf(stderr, "The server certificate uses an insecure algorithm.\n");
if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)
fprintf(stderr, "The server certificate hasn’t got a known issuer.\n");
if (status & GNUTLS_CERT_REVOKED)
fprintf(stderr, "The server certificate has been revoked.\n");
if (status & GNUTLS_CERT_EXPIRED)
fprintf(stderr, "The server certificate has expired\n");
if (status & GNUTLS_CERT_NOT_ACTIVATED)
fprintf(stderr, "The server certificate is not yet activated\n");
/* Up to here the process is the same for X.509 certificates and
* OpenPGP keys. From now on X.509 certificates are assumed. This can
* be easily extended to work with openpgp keys as well.
*/
if (gnutls_certificate_type_get (session) != GNUTLS_CRT_X509)
return GNUTLS_E_CERTIFICATE_ERROR;
if (gnutls_x509_crt_init (&cert) < 0)
{
ssl_error(ret, url, "verify certificate");
return GNUTLS_E_CERTIFICATE_ERROR;
}
cert_list = gnutls_certificate_get_peers (session, &cert_list_size);
if (cert_list == NULL)
{
fprintf(stderr, "No server certificate was found!\n");
return GNUTLS_E_CERTIFICATE_ERROR;
}
/* Check the hostname matches the certificate. */
ret = gnutls_x509_crt_import (cert, &cert_list[0], GNUTLS_X509_FMT_DER);
if (ret < 0)
{
ssl_error(ret, url, "parsing certificate");
return GNUTLS_E_CERTIFICATE_ERROR;
}
if (!(url->ssl_connected)) if (!gnutls_x509_crt_print (cert, GNUTLS_CRT_PRINT_FULL, &data)) {
fprintf(stderr, "%s", data.data);
gnutls_free(data.data);
}
if (!hostname || !gnutls_x509_crt_check_hostname (cert, hostname))
{
int found = 0;
if (hostname) {
int i;
size_t len = strlen(hostname);
if (*(hostname+len-1) == '.') len--;
if (!(url->ssl_connected)) fprintf(stderr, "Server hostname verification failed. Trying to peek into the cert.\n");
for (i=0;;i++) {
char * dn = NULL;
size_t dn_size = 0;
int dn_ret = 0;
int match=0;
gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME, i, 0, dn, &dn_size);
if (dn_size) dn = malloc(dn_size + 1); /* nul not counted */
if (dn)
dn_ret = gnutls_x509_crt_get_dn_by_oid(cert, GNUTLS_OID_X520_COMMON_NAME, i, 0, dn, &dn_size);
if (!dn_ret){
if (dn) {
if (*(dn+dn_size-1) == '.') dn_size--;
if (len == dn_size)
match = ! strncmp(dn, hostname, len);
if (match) found = 1;
if (!(url->ssl_connected)) fprintf(stderr, "Cert CN(%i): %s: %c\n", i, dn, match?'*':'X');
}}
else
ssl_error(dn_ret, url, "getting cert subject data");
if (dn) free(dn);
if (dn_ret || !dn)
break;
}
}
if(!found){
fprintf(stderr, "The server certificate’s owner does not match hostname ’%s’\n",
hostname);
return GNUTLS_E_CERTIFICATE_ERROR;
}
}
gnutls_x509_crt_deinit (cert);
/*
* It the status includes GNUTLS_CERT_INVALID whenever
* there is a problem and the other flags are just informative.
*/
if (status & GNUTLS_CERT_INVALID)
return GNUTLS_E_CERTIFICATE_ERROR;
/* notify gnutls to continue handshake normally */
return 0;
}
static void logfunc(int level, const char * str)
{
fputs(str, stderr);
}
static void ssl_error_p(ssize_t error, struct_url * url, const char * where, const char * extra)
{
const char * err_desc;
if((error == GNUTLS_E_FATAL_ALERT_RECEIVED) || (error == GNUTLS_E_WARNING_ALERT_RECEIVED))
err_desc = gnutls_alert_get_name(gnutls_alert_get(url->ss));
else
err_desc = gnutls_strerror((int)error);
fprintf(stderr, "%s: %s: %s: %s%zd %s.\n", argv0, url->tname, where, extra, error, err_desc);
}
static void ssl_error(ssize_t error, struct_url * url, const char * where)
{
ssl_error_p(error, url, where, "");
/* FIXME try to decode errors more meaningfully */
errno = EIO;
}
#endif
static void errno_report(const char * where)
{
struct_url * url = thread_setup();
int e = errno;
fprintf(stderr, "%s: %s: %s: %d %s.\n", argv0, url->tname, where, errno, strerror(errno));
errno = e;
}
static char * url_encode(char * path) {
return strdup(path); /*FIXME encode*/
}
/*
* functions for handling struct_url
*/
static int init_url(struct_url* url)
{
memset(url, 0, sizeof(*url));
url->sock_type = SOCK_CLOSED;
url->timeout = TIMEOUT;
#ifdef RETRY_ON_RESET
url->retry_reset = RESET_RETRIES;
#endif
#ifdef USE_SSL
url->cafile = CERT_STORE;
#endif
return 0;
}
static int free_url(struct_url* url)
{
if(url->sock_type != SOCK_CLOSED)
close_client_force(url);
if(url->host) free(url->host);
url->host = 0;
if(url->path) free(url->path);
url->path = 0;
if(url->name) free(url->name);
url->name = 0;
#ifdef USE_AUTH
if(url->auth) free(url->auth);
url->auth = 0;
#endif
url->port = 0;
url->proto = 0; /* only after socket closed */
url->file_size=0;
url->last_modified=0;
return 0;
}
static void print_url(FILE *f, const struct_url * url)
{
char * protocol = "?!?";
switch(url->proto){
case PROTO_HTTP:
protocol = "http";
break;;
#ifdef USE_SSL
case PROTO_HTTPS:
protocol = "https";
break;;
#endif
}
fprintf(f, "file name: \t%s\n", url->name);
fprintf(f, "content file name: \t%s\n", url->filename);
fprintf(f, "host name: \t%s\n", url->host);
fprintf(f, "port number: \t%d\n", url->port);
fprintf(f, "protocol: \t%s\n", protocol);
fprintf(f, "request path: \t%s\n", url->path);
#ifdef USE_AUTH
fprintf(f, "auth data: \t%s\n", url->auth ? "(present)" : "(null)");
#endif
}
static int parse_url(char * _url, struct_url* res, enum url_flags flag)
{
const char * url_orig;
const char * url;
const char * http = "http://";
#ifdef USE_SSL
const char * https = "https://";
#endif /* USE_SSL */
int path_start = '/';
if (!_url)
_url = res->url;
assert(_url);
switch(flag) {
case URL_DUP:
_url = strdup(_url);
case URL_SAVE:
assert (_url != res->url);
if (res->url)
free(res->url);
res->url = _url;
break;
case URL_DROP:
assert (res->url);
break;
}
/* constify so compiler warns about modification */
url_orig = url = _url;
close_client_force(res);
#ifdef USE_SSL
res->ssl_connected = 0;
#endif
if (strncmp(http, url, strlen(http)) == 0) {
url += strlen(http);
res->proto = PROTO_HTTP;
res->port = 80;
#ifdef USE_SSL
} else if (strncmp(https, url, strlen(https)) == 0) {
url += strlen(https);
res->proto = PROTO_HTTPS;
res->port = 443;
#endif /* USE_SSL */
} else {
fprintf(stderr, "Invalid protocol in url: %s\n", url_orig);
return -1;
}
/* determine if path was given */
if(res->path)
free(res->path);
if(strchr(url, path_start))
res->path = url_encode(strchr(url, path_start));
else{
path_start = 0;
res->path = strdup("/");
}
#ifdef USE_AUTH
/* Get user and password */
if(res->auth)
free(res->auth);
if(strchr(url, '@') && (strchr(url, '@') < strchr(url, path_start))){
res->auth = b64_encode((unsigned char *)url, strchr(url, '@') - url);
url = strchr(url, '@') + 1;
}else{
res->auth = 0;
}
#endif /* USE_AUTH */
/* Get port number. */
int host_end = path_start;
if(strchr(url, ':') && (strchr(url, ':') < strchr(url, path_start))){
/* FIXME check that port is a valid numeric value */
res->port = atoi(strchr(url, ':') + 1);
if (! res->port) {
fprintf(stderr, "Invalid port in url: %s\n", url_orig);
return -1;
}
host_end = ':';
}
/* Get the host name. */
if (url == strchr(url, host_end)){ /*no hastname in the url */
fprintf(stderr, "No hostname in url: %s\n", url_orig);
return -1;
}
if(res->host)
free(res->host);
res->host = strndup(url, (size_t)(strchr(url, host_end) - url));
if(flag != URL_DROP) {
/* Get the file name. */
url = strchr(url, path_start);
const char * end = url + strlen(url);
end--;
/* Handle broken urls with multiple slashes. */
while((end > url) && (*end == '/')) end--;
end++;
if(res->name)
free(res->name);
if((path_start == 0) || (end == url)
|| (strncmp(url, "/", (size_t)(end - url)) == 0)){
res->name = strdup(res->host);
}else{
while(strchr(url, '/') && (strchr(url, '/') < end))
url = strchr(url, '/') + 1;
res->name = strndup(url, (size_t)(end - url));
}
} else
assert(res->name);
res->filename = res->name;
return res->proto;
}
static void usage(void)
{
fprintf(stderr, "%s >>> Version: %s <<<\n", __FILE__, VERSION);
fprintf(stderr, "usage: %s [-c [console]] "
#ifdef USE_SSL
"[-a file] [-d n] [-5] [-2] "
#endif
"[-f] [-t timeout] [-r n] url mount-parameters\n\n", argv0);
#ifdef USE_SSL
fprintf(stderr, "\t -2 \tAllow RSA-MD2 server certificate\n");
fprintf(stderr, "\t -5 \tAllow RSA-MD5 server certificate\n");
fprintf(stderr, "\t -a \tCA file used to verify server certificate\n\t\t(default: %s)\n", CERT_STORE);
#endif
fprintf(stderr, "\t -c \tuse console for standard input/output/error\n\t\t(default: %s)\n", CONSOLE);
#ifdef USE_SSL
fprintf(stderr, "\t -d \tGNUTLS debug level (default 0)\n");
#endif
fprintf(stderr, "\t -f \tstay in foreground - do not fork\n");
#ifdef RETRY_ON_RESET
fprintf(stderr, "\t -r \tnumber of times to retry connection on reset\n\t\t(default: %i)\n", RESET_RETRIES);
#endif
fprintf(stderr, "\t -n \ttake filename from HTTP header (default: from url)\n");
fprintf(stderr, "\t -t \tset socket timeout in seconds (default: %i)\n", TIMEOUT);
fprintf(stderr, "\tmount-parameters should include the mount point\n");
}
#define shift { if(!argv[1] || !argv[2]) { usage(); return 4; };\
argc--; argv[1] = argv[0]; argv = argv + 1;}
static int convert_num(long * num, char ** argv)
{
char * end = " ";
if( isdigit(*(argv[1]))) {
*num = strtol(argv[1], &end, 0);
/* now end should point to '\0' */
}
if(*end){
usage();
fprintf(stderr, "'%s' is not a number.\n",
argv[1]);
return -1;
}
return 0;
}
int main(int argc, char *argv[])
{
char * fork_terminal = CONSOLE;
int do_fork = 1;
putenv("TZ=");/*UTC*/
argv0 = argv[0];
init_url(&main_url);
strncpy(main_url.tname, "main", TNAME_LEN);
while( argv[1] && (*(argv[1]) == '-') )
{
char * arg = argv[1]; shift;
while (*++arg){
switch (*arg){
case 'c': if( *(argv[1]) != '-' ) {
fork_terminal = argv[1]; shift;
}else{
fork_terminal = 0;
}
break;
case 'n': main_url.filename_from_header = 1;
break;
#ifdef USE_SSL
case '2': main_url.md2 = GNUTLS_VERIFY_ALLOW_SIGN_RSA_MD2;
break;
case '5': main_url.md5 = GNUTLS_VERIFY_ALLOW_SIGN_RSA_MD5;
break;
case 'a': main_url.cafile = argv[1];
shift;
break;
case 'd': if (convert_num(&main_url.ssl_log_level, argv))
return 4;
shift;
break;
#endif
#ifdef RETRY_ON_RESET
case 'r': if (convert_num(&main_url.retry_reset, argv))
return 4;
shift;
break;
#endif
case 't': if (convert_num(&main_url.timeout, argv))
return 4;
shift;
break;
case 'f': do_fork = 0;
break;
default:
usage();
fprintf(stderr, "Unknown option '%c'.\n", *arg);
return 4;
}
}
}
if (argc < 3) {
usage();
return 1;
}
if(parse_url(argv[1], &main_url, URL_DUP) == -1){
fprintf(stderr, "invalid url: %s\n", argv[1]);
return 2;
}
print_url(stderr, &main_url);
int sockfd = open_client_socket(&main_url);
if(sockfd < 0) {
fprintf(stderr, "Connection failed.\n");
return 3;