/*
* This file is part of uudeview, the simple and friendly multi-part multi-
* file uudecoder program (c) 1994-2001 by Frank Pilhofer. The author may
* be contacted at fp@fpx.de
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
/*
* These are very central functions of UUDeview. Here, we scan a file
* and decide whether it contains encoded data or not. ScanPart() must
* be called repeatedly on the same file until feof(file). Each time,
* it returns information about the next part found within.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef SYSTEM_WINDLL
#include <windows.h>
#endif
#ifdef SYSTEM_OS2
#include <os2.h>
#endif
#include <stdio.h>
#include <ctype.h>
#ifdef STDC_HEADERS
#include <stdlib.h>
#include <string.h>
#endif
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include <uudeview.h>
#include <uuint.h>
#include <fptools.h>
#include <uustring.h>
char * uuscan_id = "$Id$";
/*
* Header fields we recognize as such. See RFC822. We add "From ",
* the usual marker for a beginning of a new message, and a couple
* of usual MDA, News and MIME headers.
* We make a distinction of MIME headers as we need the difference
* to scan the bodies from partial multipart messages.
*/
#define LSTR(s) { sizeof (s) - 1, s }
struct lstr {
int len;
const char *str;
};
#define MAX_KNOWNHEADERLEN 28 /* max. length of a known header */
static struct lstr knownheaders[] = {
/* "From " handled in IsKnownHeader */
/* knownmsgheaders */
LSTR ("Return-Path"), LSTR ("Received"), LSTR ("Reply-To"),
LSTR ("From"), LSTR ("Sender"), LSTR ("Resent-Reply-To"), LSTR ("Resent-From"),
LSTR ("Resent-Sender"), LSTR ("Date"), LSTR ("Resent-Date"), LSTR ("To"),
LSTR ("Resent-To"), LSTR ("Cc"), LSTR ("Bcc"), LSTR ("Resent-bcc"),
LSTR ("Message-ID"), LSTR ("Resent-Message-Id"), LSTR ("In-Reply-To"),
LSTR ("References"), LSTR ("Keywords"), LSTR ("Subject"), LSTR ("Comments"),
LSTR ("Delivery-Date"), LSTR ("Posted-Date"), LSTR ("Received-Date"),
LSTR ("Precedence"),
LSTR ("Path"), LSTR ("Newsgroups"), LSTR ("Organization"), LSTR ("Lines"),
LSTR ("NNTP-Posting-Host"),
/* knownminehaders */
LSTR ("Mime-Version"), LSTR ("Content-Transfer-Encoding"),
LSTR ("Content-Type"), LSTR ("Content-Disposition"),
LSTR ("Content-Description"), LSTR ("Content-Length")
};
/*
* for MIME (plaintext) parts without filename
*/
int mimseqno;
/*
* how many lines do we read when checking for headers
*/
#define WAITHEADER 10
/*
* The stack for encapsulated Multipart messages
*/
#define MSMAXDEPTH 3
int mssdepth = 0;
scanstate multistack[MSMAXDEPTH+1];
/*
* The state and the local envelope
*/
headers localenv;
scanstate sstate;
/*
* mallocable areas
*/
char *uuscan_shlline;
char *uuscan_shlline2;
char *uuscan_pvvalue;
char *uuscan_phtext;
char *uuscan_sdline;
char *uuscan_sdbhds1;
char *uuscan_sdbhds2;
char *uuscan_spline;
/*
* Macro: print cancellation message in UUScanPart
*/
#define SPCANCEL() {UUMessage(uuscan_id,__LINE__,UUMSG_NOTE,uustring(S_SCAN_CANCEL));*errcode=UURET_CANCEL;goto ScanPartEmergency;}
/*
* Is line empty? A line is empty if it is composed of whitespace.
*/
static int
IsLineEmpty (char *data)
{
if (data == NULL) return 0;
while (*data && isspace (*data)) data++;
return ((*data)?0:1);
}
/*
* Is this a header line? A header line has alphanumeric characters
* followed by a colon.
*/
static int
IsHeaderLine (char *data)
{
if (data == NULL) return 0;
if (*data == ':') return 0;
while (*data && (isalnum (*data) || *data=='-')) data++;
return (*data == ':') ? 1 : 0;
}
/*
* Scans a potentially folded header line from the input file. If
* initial is non-NULL, it is the first line of the header, useful
* if the calling function just coincidentally noticed that this is
* a header.
* RFC0822 does not specify a maximum length for headers, but we
* truncate everything beyond an insane value of 1024 characters.
*/
/* (schmorp)every later rfc says 998 octets max */
static char *
ScanHeaderLine (FILE *datei, char *initial)
{
char *ptr=uuscan_shlline;
char *ptr2, *p1, *p2, *p3;
int llength, c;
long curpos;
if (initial) {
_FP_strncpy (uuscan_shlline, initial, 1024);
} else {
/* read first line */
if (feof (datei) || ferror (datei))
return NULL;
if (_FP_fgets (uuscan_shlline, 1024, datei) == NULL)
return NULL;
}
llength = strlen (uuscan_shlline);
/* strip whitespace at end */
ptr = uuscan_shlline + llength;
while (llength && isspace(*(ptr-1))) {
ptr--; llength--;
}
if (llength == 0)
return uuscan_shlline;
while (!feof (datei)) {
c = _FP_fgetc (datei);
if (c == EOF)
break;
if (c != ' ' && c != '\t')
{
ungetc (c, datei);
break;
}
while (!feof (datei) && (c == ' ' || c == '\t'))
c = _FP_fgetc (datei);
if (!feof (datei))
ungetc (c, datei); /* push back for fgets() */
else
break;
/* read next line */
curpos = ftell (datei);
if (_FP_fgets (uugen_inbuffer, 1024, datei) == NULL)
break;
if (IsLineEmpty (uugen_inbuffer)) { /* oops */
fseek (datei, curpos, SEEK_SET);
break;
}
_FP_strncpy (ptr, uugen_inbuffer, 1024-llength);
c = strlen (ptr);
/*
* strip whitespace
*/
ptr += c;
llength += c;
while (llength && isspace(*(ptr-1))) {
ptr--; llength--;
}
}
*ptr = '\0';
if (llength == 0)
return NULL;
/*
* Now that we've read the header line, we can RFC 1522-decode it
*/
ptr = uuscan_shlline;
ptr2 = uuscan_shlline2;
while (*ptr) {
/*
* Look for =? magic
*/
if (*ptr == '=' && *(ptr+1) == '?') {
/*
* Let p1 point to the charset, look for next question mark
*/
p1 = p2 = ptr+2;
while (*p2 && *p2 != '?') {
p2++;
}
if (*p2 == '?' &&
(*(p2+1) == 'q' || *(p2+1) == 'Q' ||
*(p2+1) == 'b' || *(p2+1) == 'B') &&
*(p2+2) == '?') {
/*
* Let p2 point to the encoding, look for ?= magic
*/
p2++;
p3=p2+2;
while (*p3 && (*p3 != '?' || *(p3+1) != '=')) {
p3++;
}
if (*p3 == '?' && *(p3+1) == '=') {
/*
* Alright, we've found an RFC 1522 header field
*/
if (*p2 == 'q' || *p2 == 'Q') {
c = UUDecodeField (p2+2, ptr2, QP_ENCODED);
}
else if (*p2 == 'b' || *p2 == 'B') {
c = UUDecodeField (p2+2, ptr2, B64ENCODED);
}
if (c >= 0) {
ptr2 += c;
ptr = p3+2;
continue;
}
}
}
}
*ptr2++ = *ptr++;
}
*ptr2 = 0;
return uuscan_shlline2;
}
/*
* Extract the value from a MIME attribute=value pair. This function
* receives a pointer to the attribute.
*/
static char *
ParseValue (char *attribute)
{
char *ptr=uuscan_pvvalue;
int length=0;
if (attribute == NULL)
return NULL;
while ((isalnum(*attribute) || *attribute=='_') && *attribute != '=')
attribute++;
while (isspace(*attribute))
attribute++;
if (*attribute == '=') {
attribute++;
while (isspace (*attribute))
attribute++;
}
else
return NULL;
if (*attribute == '"') {
/* quoted-string */
attribute++;
while (*attribute && *attribute != '"' && length < 255) {
if (*attribute == '\\'
&& (attribute[1] == '"'
|| attribute[1] == '\015'
|| attribute[1] == '\\'))
/* we dequote only the three characters that MUST be quoted, since
* microsoft is obviously unable to correctly implement even mime headers:
* filename="c:\xxx". *sigh*
*/
*ptr++ = *++attribute;
else
*ptr++ = *attribute;
attribute++;
length++;
}
*ptr = '\0';
}
else {
/* tspecials from RFC1521 */
/*
* Note - exclude '[', ']' and ';' on popular request; these are
* used in some Content-Type fields by the Klez virus, and people
* who feed their virus scanners with the output of UUDeview would
* like to catch it!
*/
while (*attribute && !isspace (*attribute) &&
*attribute != '(' && *attribute != ')' &&
*attribute != '<' && *attribute != '>' &&
*attribute != '@' && *attribute != ',' &&
/* *attribute != ';' && */ *attribute != ':' &&
*attribute != '\\' &&*attribute != '"' &&
*attribute != '/' && /* *attribute != '[' &&
*attribute != ']' && */ *attribute != '?' &&
*attribute != '=' && length < 255) {
*ptr++ = *attribute++;
length++;
}
*ptr = '\0';
}
return uuscan_pvvalue;
}
/*
* Extract the information we need from header fields
*/
static headers *
ParseHeader (headers *theheaders, char *line)
{
char **variable=NULL;
char *value, *ptr, *thenew;
int delimit, length;
value = 0; delimit = 0; /* calm down gcc */
if (line == NULL)
return theheaders;
if (_FP_strnicmp (line, "From:", 5) == 0) {
if (theheaders->from) return theheaders;
variable = &theheaders->from;
value = line+5;
delimit = 0;
}
else if (_FP_strnicmp (line, "Subject:", 8) == 0) {
if (theheaders->subject) return theheaders;
variable = &theheaders->subject;
value = line+8;
delimit = 0;
}
else if (_FP_strnicmp (line, "To:", 3) == 0) {
if (theheaders->rcpt) return theheaders;
variable = &theheaders->rcpt;
value = line+3;
delimit = 0;
}
else if (_FP_strnicmp (line, "Date:", 5) == 0) {
if (theheaders->date) return theheaders;
variable = &theheaders->date;
value = line+5;
delimit = 0;
}
else if (_FP_strnicmp (line, "Mime-Version:", 13) == 0) {
if (theheaders->mimevers) return theheaders;
variable = &theheaders->mimevers;
value = line+13;
delimit = 0;
}
else if (_FP_strnicmp (line, "Content-Type:", 13) == 0) {
if (theheaders->ctype) return theheaders;
variable = &theheaders->ctype;
value = line+13;
delimit = ';';
/* we can probably extract more information */
if ((ptr = _FP_stristr (line, "boundary")) != NULL) {
if ((thenew = ParseValue (ptr))) {
if (theheaders->boundary) free (theheaders->boundary);
theheaders->boundary = _FP_strdup (thenew);
}
}
if ((ptr = _FP_stristr (line, "name")) != NULL) {
if ((thenew = ParseValue (ptr))) {
if (theheaders->fname) free (theheaders->fname);
theheaders->fname = _FP_strdup (thenew);
}
}
if ((ptr = _FP_stristr (line, "id")) != NULL) {
if ((thenew = ParseValue (ptr))) {
if (theheaders->mimeid) free (theheaders->mimeid);
theheaders->mimeid = _FP_strdup (thenew);
}
}
if ((ptr = _FP_stristr (line, "number")) != NULL) {
if ((thenew = ParseValue (ptr))) {
theheaders->partno = atoi (thenew);
}
}
if ((ptr = _FP_stristr (line, "total")) != NULL) {
if ((thenew = ParseValue (ptr))) {
theheaders->numparts = atoi (thenew);
}
}
}
else if (_FP_strnicmp (line, "Content-Transfer-Encoding:", 26) == 0) {
if (theheaders->ctenc) return theheaders;
variable = &theheaders->ctenc;
value = line+26;
delimit = ';';
}
else if (_FP_strnicmp (line, "Content-Disposition:", 20) == 0) {
/*
* Some encoders mention the original filename as parameter to
* Content-Type, others as parameter to Content-Disposition. We
* do prefer the first solution, but accept this situation, too.
* TODO: Read RFC1806
*/
if ((ptr = _FP_stristr (line, "name")) != NULL) {
if (theheaders->fname == NULL && (thenew=ParseValue(ptr)) != NULL) {
theheaders->fname = _FP_strdup (thenew);
}
}
variable = NULL;
}
else {
/*
* nothing interesting
*/
return theheaders;
}
/*
* okay, so extract the actual data
*/
if (variable) {
length = 0;
ptr = uuscan_phtext;
while (isspace (*value))
value++;
while (*value && (delimit==0 || *value!=delimit) &&
*value && length < 255) {
*ptr++ = *value++;
length++;
}
while (length && isspace(*(ptr-1))) {
ptr--; length--;
}
*ptr = '\0';
if ((*variable = _FP_strdup (uuscan_phtext)) == NULL)
return NULL;
}
return theheaders;
}
/*
* is this a header line we know about?
*/
static int
IsKnownHeader (char *line)
{
const char *sep;
int len, i;
/* "From " handled specially */
/* we assume the buffer is at least 5 bytes long */
if (line [4] == ' ' && line [1] == 'r' && line [2] == 'o' && line [3] == 'm'
&& (line [0] == 'f' || line [0] == 'F'))
return 1;
sep = memchr (line, ':', MAX_KNOWNHEADERLEN);
/* fast reject, the majority of calls are simple rejects */
if (!sep)
return 0;
len = sep - line; /* length of part before ':' */
for (i = 0; i < sizeof (knownheaders) / sizeof (knownheaders [0]); ++i)
if (len == knownheaders [i].len && _FP_strnicmp (line, knownheaders [i].str, len) == 0)
return 1;
return 0;
}
/*
* Scan a header
*/
int
UUScanHeader (FILE *datei, headers *envelope)
{
char *ptr;
while (!feof (datei)) {
if ((ptr = ScanHeaderLine (datei, NULL)) == NULL)
break;
if (*ptr == '\0')
break;
ParseHeader (envelope, ptr);
}
return 0;
}
/*
* Scan something for encoded data and fill the fileread* structure.
* If boundary is non-NULL, we stop after having read it. If Check-
* Headers != 0, we also stop after we've found uu_headercount recog-
* nized header lines.
* If we have a boundary, then we also don't accept Base64; MIME mails
* really should handle this properly.
* We return -1 if something went wrong, 0 if everything is normal,
* 1 if we found a new header and 2 if we found a boundary.
* In MIME message bodies (not multiparts), we also disable our reduced
* MIME handling.
*/
static int
ScanData (FILE *datei, char *fname, int *errcode,
char *boundary, int ismime, int checkheaders,
fileread *result)
{
char *line=uuscan_sdline, *bhds1=uuscan_sdbhds1, *bhds2=uuscan_sdbhds2;
static char *ptr, *p2, *p3=NULL, *bhdsp, bhl;
int islen[10], isb64[10], isuue[10], isxxe[10], isbhx[10], iscnt;
int cbb64, cbuue, cbxxe, cbbhx;
int bhflag=0, vflag, haddh=0, hadct=0;
int bhrpc=0, bhnf=0, c, hcount, lcount, blen=0;
int encoding=0, dflag=0, ctline=42;
int dontcare=0, hadnl=0;
long preheaders=0, oldposition;
long yepartends=0;
size_t dcc, bhopc;
*errcode = UURET_OK;
(void) UUDecodeLine (NULL, NULL, 0); /* init */
bhdsp = bhds2;
if (datei == NULL || feof (datei))
return -1;
result->startpos = ftell (datei);
hcount = lcount = 0;
for (iscnt=0; iscnt<10; iscnt++) {
isb64[iscnt] = isuue[iscnt] = isxxe[iscnt] = isbhx[iscnt] = 0;
islen[iscnt] = -1;
}
iscnt = 0;
if (boundary)
blen = strlen (boundary);
while (!feof (datei)) {
oldposition = ftell (datei);
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (ferror (datei))
break;
/*
* Make Busy Polls
*/
if (UUBUSYPOLL(ftell(datei),progress.fsize)) {
UUMessage (uuscan_id, __LINE__, UUMSG_NOTE,
uustring (S_SCAN_CANCEL));
*errcode = UURET_CANCEL;
break;
}
if (IsLineEmpty (line)) { /* line empty? */
hcount = 0;
hadnl = 1;
continue; /* then ignore */
}
if (checkheaders) {
if (IsKnownHeader (line)) {
(void) ScanHeaderLine (datei, line);
if (hcount == 0) {
preheaders = oldposition;
lcount = 0;
}
hcount++;
lcount++;
/*
* check for the various restart counters
*/
if ((hcount >= hlcount.restart) ||
(hcount >= hlcount.afterdata && ismime == 0) ||
(hcount >= hlcount.afterdata && result->uudet) ||
(hcount >= hlcount.afternl && result->uudet && hadnl)) {
/*
* Hey, a new header starts here
*/
fseek (datei, preheaders, SEEK_SET);
break;
}
/* continue; */
}
else if (lcount > WAITHEADER) {
hcount = 0;
lcount = 0;
dontcare=0;
}
else if (hcount) {
lcount++;
dontcare=1;
}
else {
dontcare=0;
}
}
else {
dontcare=0;
}
if (boundary != NULL &&
line[0] == '-' && line[1] == '-' &&
strncmp (line+2, boundary, blen) == 0) {
fseek (datei, oldposition, SEEK_SET);
break;
}
if (boundary != NULL && line[0] == 'C' && line[1] == 'o' &&
_FP_strnicmp (line, "Content-Type:", 13) == 0) {
ptr = ScanHeaderLine (datei, line);
p2 = (ptr)?_FP_stristr(ptr,"boundary"):NULL;
p3 = (p2)?ParseValue(p2):NULL;
if (p3 && strcmp (p3, boundary) == 0) {
fseek (datei, oldposition, SEEK_SET);
break;
}
else {
p3 = NULL;
}
}
if (strncmp (line, "begin ", 6) == 0 ||
_FP_strnicmp (line, "<pre>begin ", 11) == 0) {
if ((result->begin || result->end ||
result->uudet == B64ENCODED ||
result->uudet == BH_ENCODED) && !uu_more_mime) {
fseek (datei, oldposition, SEEK_SET);
break;
}
if (*line == '<')
ptr = line + 10;
else
ptr = line + 5;
while (*ptr == ' ') ptr++;
while (isdigit (*ptr))
result->mode = result->mode * 8 + *ptr++ - '0';
while (*ptr == ' ') ptr++;
/*
* We may have picked up a filename from a uuenview-style header
*/
_FP_free (result->filename);
result->filename = _FP_strdup (ptr);
result->begin = 1;
while (isspace (result->filename[strlen(result->filename)-1]))
result->filename[strlen(result->filename)-1] = '\0';
continue;
}
if ((strncmp (line, "end", 3) == 0) &&
result->uudet != BH_ENCODED &&
result->uudet != YENC_ENCODED) {
if (result->uudet == B64ENCODED && result->begin)
result->uudet = XX_ENCODED;
if (result->uudet != B64ENCODED) {
result->end = 1;
if (dflag && encoding)
result->uudet = encoding;
continue;
}
}
hadnl = 0;
/*
* Detect a UUDeview-Style header
*/
if (_FP_strnicmp (line, "_=_ Part ", 9) == 0 &&
result->uudet != YENC_ENCODED) {
if (result->uudet) {
fseek (datei, oldposition, SEEK_SET);
break;
}
result->partno = atoi (line + 8);
if ((ptr = _FP_stristr (line, "of file ")) != NULL) {
ptr += 8;
while (isspace (*ptr)) ptr++;
p2 = ptr;
while (isalnum(*p2) ||
*p2 == '.' || *p2=='_' || *p2 == '-' ||
*p2 == '!' || *p2=='@' || *p2 == '$')
p2++;
c = *p2; *p2 = '\0';
if (p2 != ptr && result->filename == NULL)
result->filename = _FP_strdup (ptr);
else if (p2 - ptr > 5 && strchr (ptr, '.') != NULL) {
/*
* This file name looks good, too. Let's use it
*/
_FP_free (result->filename);
result->filename = _FP_strdup (ptr);
}
*p2 = c;
}
}
/*
* Some reduced MIME handling. Only use if boundary == NULL. Also
* accept the "X-Orcl-Content-Type" used by some braindead program.
*/
if (boundary == NULL && !ismime && !uu_more_mime &&
result->uudet != YENC_ENCODED) {
if (_FP_strnicmp (line, "Content-Type", 12) == 0 ||
_FP_strnicmp (line, "X-Orcl-Content-Type", 19) == 0) {
/*
* We use Content-Type to mark a new attachment and split the file.
* However, we do not split if we haven't found anything encoded yet.
*/
if (result->uudet) {
fseek (datei, oldposition, SEEK_SET);
break;
}
if ((ptr = strchr (line, ':')) != NULL) {
ptr++;
while (isspace (*ptr)) ptr++; p2 = ptr;
while (!isspace (*p2) && *p2 != ';') p2++;
c = *p2; *p2 = '\0';
if (p2 != ptr) {
_FP_free (result->mimetype);
result->mimetype = _FP_strdup (ptr);
}
*p2 = c;
}
ctline=0;
hadct=1;
}
if ((ptr = _FP_stristr (line, "number=")) && ctline<4) {
ptr += 7; if (*ptr == '"') ptr++;
result->partno = atoi (ptr);
}
if ((ptr = _FP_stristr (line, "total=")) && ctline<4) {
ptr += 6; if (*ptr == '"') ptr++;
result->maxpno = atoi (ptr);
}
if ((ptr = _FP_stristr (line, "name=")) && ctline<4) {
ptr += 5;
while (isspace (*ptr)) ptr++;
if (*ptr == '"' && *(ptr+1) && (p2 = strchr (ptr+2, '"')) != NULL) {
c = *p2; *p2 = '\0';
_FP_free (result->filename);
result->filename = _FP_strdup (ptr+1);
*p2 = c;
}
else if (*ptr=='\''&&*(ptr+1)&&(p2 = strchr(ptr+2, '\'')) != NULL) {
c = *p2; *p2 = '\0';
_FP_free (result->filename);
result->filename = _FP_strdup (ptr+1);
*p2 = c;
}
else {
p2 = ptr;
while (isalnum(*p2) ||
*p2 == '.' || *p2=='_' || *p2 == '-' ||
*p2 == '!' || *p2=='@' || *p2 == '$')
p2++;
c = *p2; *p2 = '\0';
if (p2 != ptr && result->filename == NULL)
result->filename = _FP_strdup (ptr);
else if (p2 - ptr > 5 && strchr (ptr, '.') != NULL) {
/*
* This file name looks good, too. Let's use it
*/
_FP_free (result->filename);
result->filename = _FP_strdup (ptr);
}
*p2 = c;
}
}
if ((ptr = _FP_stristr (line, "id=")) && ctline<4) {
p2 = ptr += 3;
if (*p2 == '"') {
p2 = strchr (++ptr, '"');
}
else {
while (*p2 && isprint(*p2) && !isspace(*p2) && *p2 != ';')
p2++;
}
if (p2 && *p2 && p2!=ptr) {
c = *p2; *p2 = '\0';
if (result->mimeid)
_FP_free (result->mimeid);
result->mimeid = _FP_strdup (ptr);
*p2 = c;
}
}
/*
* Handling for very short Base64 files.
*/
if (uu_tinyb64 && !ismime && !uu_more_mime) {
if (line[0] == '-' && line[1] == '-') {
if (dflag && (encoding==B64ENCODED || result->uudet==B64ENCODED)) {
if (encoding==B64ENCODED && result->uudet==0 && (haddh||hadct)) {
result->uudet = encoding;
encoding = dflag = 0;
}
haddh = 1;
continue;
}
hadct = 0;
}
}
} /* end of reduced MIME handling */
/*
* If we're in "freestyle" mode, have not encountered anything
* interesting yet, and stumble upon something that looks like
* a boundary, followed by a Content-* line, try to use it.
*/
if (boundary == NULL && !ismime && !uu_more_mime && dflag <= 1 &&
line[0] == '-' && line[1] == '-' && strlen(line+2)>10 &&
(((ptr = _FP_strrstr (line+2, "--")) == NULL) ||
ptr[2]) &&
_FP_strstr (line+2, "_=_") != NULL) {
long oldposition = ftell (datei); /* refresh oldpositition so the comment below becomes true */
if (_FP_fgets (line, 1024, datei) == NULL) {
break;
}
if (_FP_strnicmp (line, "Content-", 8) == 0) {
/*
* Okay, let's do it. This breaks out of ScanData. ScanPart will
* recognize the boundary on the next call and use it.
*/
fseek (datei, oldposition, SEEK_SET);
break;
}
}
/*
* Detection for yEnc encoding
*/
if (strncmp (line, "=ybegin ", 8) == 0 &&
_FP_strstr (line, " name=") != NULL) {
if ((result->begin || result->end || result->uudet) && !uu_more_mime) {
fseek (datei, oldposition, SEEK_SET);
break;
}
/*
* name continues to the end of the line
*/
ptr = _FP_strstr (line, " name=") + 6;
/* newsbin pro 5.0 (at least) is braindamaged enough to put (null) here */
/* create something sensible, trust a windows program to fuck it up */
if (strncmp (ptr, "(null)", 6))
{
_FP_free (result->filename);
result->filename = _FP_strdup (ptr);
while (isspace (result->filename[strlen(result->filename)-1]))
result->filename[strlen(result->filename)-1] = '\0';
}
/*
* Determine size
*/
if ((ptr = _FP_strstr (line, " size=")) != NULL) {
ptr += 6;
result->yefilesize = atoi (ptr);
}
else {
result->yefilesize = -1;
}
/*
* check for multipart file and read =ypart line
*/
if ((ptr = _FP_strstr (line, " part=")) != NULL) {
result->partno = atoi (ptr + 6);
if (result->partno == 1) {
result->begin = 1;
}
if ((ptr = _FP_strstr (line, " total=")))
result->maxpno = atoi (ptr + 7);
if (_FP_fgets (line, 1024, datei) == NULL) {
break;
}
if (strncmp (line, "=ypart ", 7) != 0) {
break;
}
if ((ptr = _FP_strstr (line, " end=")) == NULL) {
break;
}
yepartends = atoi (ptr + 5);
}
else {
result->partno = 1;
result->begin = 1;
}
/*
* Don't want auto-detection
*/
result->uudet = YENC_ENCODED;
continue;
}
if (strncmp (line, "=yend ", 6) == 0 &&
result->uudet == YENC_ENCODED) {
if (yepartends == 0) {
if (!result->maxpno || result->maxpno == result->partno)
result->end = 1;
} else if (yepartends >= result->yefilesize) {
result->end = 1;
}
#if 0
if (!uu_more_mime)
break;
#endif
continue;
}
/*
* if we haven't yet found anything encoded, try to find something
*/
if (!(result->uudet)) {
/*
* Netscape-Repair code is the same as in uunconc.c
*/
if ((vflag = UUValidData (line, 0, &bhflag)) == 0 && !ismime)
vflag = UURepairData (datei, line, 0, &bhflag);
/*
* Check data against all possible encodings
*/
islen[iscnt%10] = strlen(line);
isb64[iscnt%10] = (UUValidData (line, B64ENCODED, &bhflag)==B64ENCODED);
isuue[iscnt%10] = (UUValidData (line, UU_ENCODED, &bhflag)==UU_ENCODED);
isxxe[iscnt%10] = (UUValidData (line, XX_ENCODED, &bhflag)==XX_ENCODED);
isbhx[iscnt%10] = (UUValidData (line, BH_ENCODED, &bhflag)==BH_ENCODED);
/*
* If we've got a first valid encoded line, we get suspicious if
* it's shorter than, say, 40 characters.
*/
if (vflag == B64ENCODED &&
(dflag == 0 || encoding != B64ENCODED) &&
strlen (line) < 40 && !result->begin && !uu_tinyb64) {
isb64[iscnt%10] = 0;
vflag = 0;
}
if ((vflag == UU_ENCODED || vflag == XX_ENCODED) &&
(dflag == 0 || encoding != vflag) &&
strlen (line) < 40 && !result->begin) {
isuue[iscnt%10] = isxxe[iscnt%10] = 0;
vflag = 0;
}
iscnt++;
/*
* Ah, so we got an encoded line? How interesting!
*/
if (vflag) {
/*
* For BinHex data, we can use the initial colon ':' as begin
* and the terminating colon as ':'.
* If (vflag && !bhflag), this is the last line,
*/
if (vflag == BH_ENCODED) {
if (line[0] == ':' && result->end) {
fseek (datei, oldposition, SEEK_SET);
break;
}
if (line[0] == ':')
result->begin = 1;
if (bhflag == 0) {
result->uudet = BH_ENCODED;
result->end = 1;
}
}
/*
* For BinHex files, the file name is encoded in the first encoded
* data bytes. We try to extract it here
*/
if (vflag == BH_ENCODED && bhnf == 0 && result->filename == NULL) {
if (bhdsp == bhds2 ||
((bhdsp-bhds2) <= (int) bhds2[0] &&
(bhdsp-bhds2) < 256)) {
dcc = UUDecodeLine (line, bhds1, BH_ENCODED);
UUbhdecomp (bhds1, bhdsp, &bhl, &bhrpc,
dcc, 256-(bhdsp-bhds2), &bhopc);
bhdsp += bhopc;
}
if ((bhdsp-bhds2) > (int) bhds2[0] && bhds2[0]>0 &&
result->filename==NULL) {
memcpy (bhds1, bhds2+1, (int) bhds2[0]);
bhds1[(int)bhds2[0]]='\0';
result->filename = _FP_strdup (bhds1);
bhnf = 1;
}
else if (bhdsp-bhds2 >= 256 && bhds2[0]>0) {
memcpy (bhds1, bhds2+1, 255);
bhds1[255] = '\0';
result->filename = _FP_strdup (bhds1);
bhnf = 1;
}
else if (bhds2[0] <= 0)
bhnf = 1;
}
/*
* We accept an encoding if it has been true for four consecutive
* lines. Check the is<enc> arrays to avoid mistaking one encoding
* for the other. Uuencoded data is rather easily mistaken for
* Base 64. If the data matches more than one encoding, we need to
* scan further.
*
* Since text can also rather easily be mistaken for UUencoded
* data if it just happens to have 4 lines in a row that have the
* correct first character for the length of the line, we also add
* a check that the first 3 lines must be the same length, and the
* 4th line must be less than or equal to that length. (since
* uuencoders use the same length for all lines except the last,
* this shouldn't increase the minimum size of UUdata we can
* detect, as it would if we tested all 4 lines for being the same
* length.) - Matthew Mueller, 20030109
*/
if (iscnt > 3) {
cbb64 = (isb64[(iscnt-1)%10] && isb64[(iscnt-2)%10] &&
isb64[(iscnt-3)%10] && isb64[(iscnt-4)%10]);
cbuue = (isuue[(iscnt-1)%10] && isuue[(iscnt-2)%10] &&
isuue[(iscnt-3)%10] && isuue[(iscnt-4)%10] &&
islen[(iscnt-1)%10] <= islen[(iscnt-2)%10] &&
islen[(iscnt-2)%10] == islen[(iscnt-3)%10] &&
islen[(iscnt-3)%10] == islen[(iscnt-4)%10]);
cbxxe = (isxxe[(iscnt-1)%10] && isxxe[(iscnt-2)%10] &&
isxxe[(iscnt-3)%10] && isxxe[(iscnt-4)%10] &&
islen[(iscnt-1)%10] <= islen[(iscnt-2)%10] &&
islen[(iscnt-2)%10] == islen[(iscnt-3)%10] &&
islen[(iscnt-3)%10] == islen[(iscnt-4)%10]);
cbbhx = (isbhx[(iscnt-1)%10] && isbhx[(iscnt-2)%10] &&
isbhx[(iscnt-3)%10] && isbhx[(iscnt-4)%10]);
}
else {
cbb64 = cbuue = cbxxe = cbbhx = 0;
}
if (cbb64 && !cbuue && !cbxxe && !cbbhx) {
result->uudet = B64ENCODED;
}
else if (!cbb64 && cbuue && !cbxxe && !cbbhx) {
result->uudet = UU_ENCODED;
}
else if (!cbb64 && !cbuue && cbxxe && !cbbhx) {
result->uudet = XX_ENCODED;
}
else if (!cbb64 && !cbuue && !cbxxe && cbbhx) {
result->uudet = BH_ENCODED;
}
if (result->uudet) {
encoding = dflag = 0;
/*
* If we're in fast mode, we're told we don't have to look
* for anything below, so we can as well break out of every-
* thing
* We cannot fast-scan if we have a boundary to look after.
*/
if (uu_fast_scanning && boundary == NULL)
break;
/*
* Skip the encoded data. We simply wait for a boundary, for
* a header or for an empty line. But we also try to pick up
* an "end"
*/
hcount = lcount = 0;
while (!feof (datei)) {
/*
* Make Busy Polls
*/
if (UUBUSYPOLL(ftell(datei),progress.fsize)) {
UUMessage (uuscan_id, __LINE__, UUMSG_NOTE,
uustring (S_SCAN_CANCEL));
*errcode = UURET_CANCEL;
break;
}
oldposition = ftell (datei);
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (ferror (datei))
break;
/*
* Stop scanning at an empty line or a MIME-boundary.
*/
if (IsLineEmpty (line))
break;
if (boundary && line[0] == '-' && line[1] == '-' &&
strncmp (line+2, boundary, blen) == 0) {
fseek (datei, oldposition, SEEK_SET);
break;
}
else if (line[0] == 'e' && (result->uudet == UU_ENCODED ||
result->uudet == XX_ENCODED)) {
if (strncmp (line, "end", 3) == 0) {
result->end = 1;
break;
}
}
else if (line[0] == 'b') {
if (strncmp (line, "begin ", 6) == 0) {
fseek (datei, oldposition, SEEK_SET);
break;
}
}
if (checkheaders) {
if (IsKnownHeader (line)) {
(void) ScanHeaderLine (datei, line);
if (hcount == 0)
preheaders = oldposition;
hcount++;
lcount++;
if ((hcount >= hlcount.restart) ||
(hcount >= hlcount.afterdata && result->uudet)) {
/*
* Hey, a new header starts here
*/
fseek (datei, preheaders, SEEK_SET);
break;
}
}
else if (lcount > WAITHEADER) {
hcount = 0;
lcount = 0;
}
else if (hcount) {
lcount++;
}
}
if (result->uudet == BH_ENCODED) {
/* pick up ``EOF'' for BinHex files. Slow :-< */
if (line[0] && strchr (line+1, ':') != NULL) {
result->end = 1;
bhflag = 0;
break;
}
}
}
if (ferror (datei) || *errcode == UURET_CANCEL)
break;
if (line[0] == '-' && line[1] == '-')
haddh = 1;
/*
* Okay, got everything we need. If we had headers or a
* boundary, we break out of the outer loop immediately.
*/
if (IsKnownHeader (line) ||
(boundary && line[0] == '-' && line[1] == '-' &&
strncmp (line+2, boundary, blen) == 0)) {
break;
}
/*
* Otherwise, we wait until finding something more interesting
* in the outer loop
*/
continue;
}
/*
* Select the encoding with the best "history"
*/
cbb64 = isb64[(iscnt-1)%10];
cbuue = isuue[(iscnt-1)%10];
cbxxe = isxxe[(iscnt-1)%10];
cbbhx = isbhx[(iscnt-1)%10];
dflag = 0;
if (cbb64 || cbuue || cbxxe || cbbhx) {
for (dflag=2; dflag<iscnt && dflag<4; dflag++) {
if ((!cbb64 || !isb64[(iscnt-dflag)%10]) &&
(!cbuue || !isuue[(iscnt-dflag)%10]) &&
(!cbxxe || !isxxe[(iscnt-dflag)%10]) &&
(!cbbhx || !isbhx[(iscnt-dflag)%10])) {
dflag--;
break;
}
cbb64 &= isb64[(iscnt-dflag)%10];
cbuue &= isuue[(iscnt-dflag)%10];
cbxxe &= isxxe[(iscnt-dflag)%10];
cbbhx &= isbhx[(iscnt-dflag)%10];
}
}
/*
* clear-cut cases
*/
if (cbb64 && !cbuue && !cbxxe && !cbbhx) {
encoding = B64ENCODED;
}
else if (!cbb64 && cbuue && !cbxxe && !cbbhx) {
encoding = UU_ENCODED;
}
else if (!cbb64 && !cbuue && cbxxe && !cbbhx) {
encoding = XX_ENCODED;
}
else if (!cbb64 && !cbuue && !cbxxe && cbbhx) {
encoding = BH_ENCODED;
}
else {
encoding = 0;
}
/*
* Check a few common non-clear-cut cases
*/
if (!encoding && cbuue && result->begin) {
encoding = UU_ENCODED;
}
else if (!encoding && cbxxe && result->begin) {
encoding = XX_ENCODED;
}
else if (!encoding && cbb64) {
encoding = B64ENCODED;
}
else if (!encoding && cbuue) {
encoding = UU_ENCODED;
}
else if (!encoding && cbxxe) {
encoding = XX_ENCODED;
}
else if (!encoding && cbbhx) {
encoding = BH_ENCODED;
}
}
else if (!dontcare) {
encoding = 0;
dflag = 0;
haddh = 0;
}
} /* if (!uudet) */
/*
* End of scanning loop
*/
} /* while (!feof (datei)) */
if (feof (datei))
oldposition = ftell (datei);
if (dflag && encoding == B64ENCODED && haddh)
result->uudet = B64ENCODED;
else if (dflag && encoding == BH_ENCODED)
result->uudet = BH_ENCODED;
/* Base64 doesn't have begin or end, so it was probably XX */
if (result->uudet == B64ENCODED && result->begin && result->end)
result->uudet = XX_ENCODED;
/* Base64 doesn't have begin or end */
if (result->uudet == B64ENCODED)
result->begin = result->end = 0;
/* Base64 and BinHex don't have a file mode */
if (result->uudet == B64ENCODED || result->uudet == BH_ENCODED ||
result->uudet == YENC_ENCODED)
result->mode = 6*64+4*8+4;
/*
* When strict MIME adherance is set, throw out suspicious attachments
*/
if (uu_more_mime) {
/*
* In a MIME message, Base64 should be appropriately tagged
*/
if (result->uudet == B64ENCODED) {
result->uudet = 0;
}
/*
* Do not accept incomplete UU or XX encoded messages
*/
if ((result->uudet != 0 && result->uudet != B64ENCODED) &&
(!result->begin || !result->end)) {
result->uudet = 0;
}
}
/*
* In fast mode, this length will yield a false value. We don't care.
* This must be checked for in uunconc(), where we usually stop decoding
* after reaching startpos+length
*/
if (uu_fast_scanning)
result->length = progress.fsize-result->startpos;
else
result->length = ftell(datei)-result->startpos;
if (ferror (datei)) {
*errcode = UURET_IOERR;
uu_errno = errno;
return -1;
}
if (*errcode != UURET_OK) {
return -1;
}
if (boundary && line[0] == '-' && line[1] == '-' &&
strncmp (line+2, boundary, blen) == 0)
return 2;
else if (boundary && p3 &&
line[0] == 'C' && line[1] == 'o' &&
_FP_strnicmp (line, "Content-Type:", 13) == 0 &&
strcmp (p3, boundary) == 0)
return 2;
else if (IsKnownHeader (line))
return 1;
return 0;
}
/*
* This is the main scanning function.
*/
fileread *
ScanPart (FILE *datei, char *fname, int *errcode)
{
int ecount, hcount, lcount;
int bhflag, begflag, vflag, blen=0, res;
long preheaders, prevpos=0, preenc, before;
char *line=uuscan_spline;
fileread *result;
char *ptr1, *ptr2;
(void) UUDecodeLine (NULL, NULL, 0); /* init */
if (datei == NULL || feof (datei)) {
*errcode = UURET_OK;
return NULL;
}
*errcode = UURET_OK;
if ((result = (fileread *) malloc (sizeof (fileread))) == NULL) {
*errcode = UURET_NOMEM;
return NULL;
}
memset (result, 0, sizeof (fileread));
result->startpos = ftell (datei);
preheaders = result->startpos;
before = result->startpos;
/* if this is a new file, reset our scanning state */
if (sstate.source == NULL || strcmp (fname, sstate.source) != 0) {
sstate.isfolder = 1; /* assume yes */
sstate.ismime = 0; /* wait for MIME-Version */
sstate.mimestate = MS_HEADERS; /* assume headers follow */
/* mimseqno = 1; */
while (mssdepth) {
mssdepth--;
UUkillheaders (&(multistack[mssdepth].envelope));
_FP_free (multistack[mssdepth].source);
}
UUkillheaders (&sstate.envelope);
memset (&sstate.envelope, 0, sizeof (headers));
_FP_free (sstate.source);
if ((sstate.source = _FP_strdup (fname)) == NULL) {
*errcode = UURET_NOMEM;
_FP_free (result);
return NULL;
}
/* ignore empty lines at the beginning of a file */
preheaders = ftell (datei);
while (!feof (datei)) {
if (UUBUSYPOLL(preheaders,progress.fsize)) SPCANCEL();
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (!IsLineEmpty (line)) {
fseek (datei, preheaders, SEEK_SET);
break;
}
preheaders = ftell (datei);
}
}
if (ferror(datei) || feof(datei)) {
_FP_free (result);
return NULL;
}
/*
* If we are confident that this is a mail folder and are at the
* beginning of the file, expecting to read some headers, scan
* the envelope.
*/
if (sstate.isfolder && sstate.mimestate == MS_HEADERS) {
hcount = 0;
lcount = 0;
UUkillheaders (&sstate.envelope);
/*
* clean up leftovers from invalid messages
*/
while (mssdepth) {
mssdepth--;
UUkillheaders (&(multistack[mssdepth].envelope));
_FP_free (multistack[mssdepth].source);
}
prevpos = ftell (datei);
if (_FP_fgets (line, 1024, datei) == NULL) {
_FP_free (result);
return NULL;
}
/*
* Special handling for AOL folder files, which start off with a boundary.
* We recognize them by a valid boundary line as the first line of a file.
* Note that the rest of the scanning code becomes suspicious if a boun-
* dary does never appear in a file -- this should save us from grave
* false detection errors
*/
if (!feof (datei) && line[0] == '-' && line[1] == '-' && line[2]) {
sstate.ismime = 1;
sstate.envelope.mimevers = _FP_strdup ("1.0");
sstate.envelope.boundary = _FP_strdup (line+2);
sstate.envelope.ctype = _FP_strdup ("multipart/mixed");
sstate.mimestate = MS_SUBPART;
*errcode = UURET_CONT;
_FP_free (result);
return NULL;
}
/*
* Normal behavior: look for a RFC 822 header
*/
while (!feof (datei) && !IsLineEmpty (line)) {
if (IsKnownHeader (line))
hcount++;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
if (IsHeaderLine (line)) {
ptr1 = ScanHeaderLine (datei, line);
if (ParseHeader (&sstate.envelope, ptr1) == NULL) {
*errcode = UURET_NOMEM;
_FP_free (result);
return NULL;
}
}
/*
* if we've read too many lines without finding headers, then
* this probably isn't a mail folder after all
*/
lcount++;
if (lcount > WAITHEADER && hcount < hlcount.afternl) {
fseek (datei, prevpos, SEEK_SET);
line[0] = '\0';
break;
}
if (_FP_fgets (line, 1024, datei) == NULL) {
/* If we are at eof without finding headers, there probably isn't */
if (hcount < hlcount.afternl)
fseek (datei, prevpos, SEEK_SET);
break;
}
}
/* skip empty lines */
prevpos = ftell (datei);
if (IsLineEmpty (line)) {
while (!feof (datei)) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
if (!IsLineEmpty (line)) {
fseek (datei, prevpos, SEEK_SET);
break;
}
prevpos = ftell (datei);
}
}
/*
* If we don't have all valid MIME headers yet, but the following
* line is a MIME header, accept it anyway.
*/
if (!uu_more_mime &&
sstate.envelope.mimevers == NULL &&
sstate.envelope.ctype == NULL &&
sstate.envelope.ctenc == NULL &&
IsKnownHeader (line)) {
/*
* see above
*/
_FP_fgets (line, 1024, datei);
while (!feof (datei) && !IsLineEmpty (line)) {
if (IsKnownHeader (line))
hcount++;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
ptr1 = ScanHeaderLine (datei, line);
if (ParseHeader (&sstate.envelope, ptr1) == NULL) {
*errcode = UURET_NOMEM;
_FP_free (result);
return NULL;
}
if (_FP_fgets (line, 1024, datei) == NULL)
break;
}
/* skip empty lines */
prevpos = ftell (datei);
while (!feof (datei)) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
if (!IsLineEmpty (line)) {
fseek (datei, prevpos, SEEK_SET);
break;
}
prevpos = ftell (datei);
}
}
/*
* A partial multipart message probably has only a Content-Type
* header but nothing else. In this case, at least simulate a
* MIME message
* if mimevers is not set but there are other well-known MIME
* headers, don't be too picky about it.
*/
if (sstate.envelope.ctype && sstate.envelope.mimevers==NULL &&
_FP_stristr (sstate.envelope.ctype, "multipart") != NULL &&
sstate.envelope.boundary != NULL) {
sstate.envelope.mimevers = _FP_strdup ("1.0");
hcount = hlcount.afternl;
}
else if (sstate.envelope.mimevers==NULL && sstate.envelope.ctype &&
sstate.envelope.fname && sstate.envelope.ctenc) {
sstate.envelope.mimevers = _FP_strdup ("1.0");
hcount = hlcount.afternl;
}
if (sstate.envelope.mimevers != NULL) {
/* this is a MIME file. check the Content-Type */
sstate.ismime = 1;
if (_FP_stristr (sstate.envelope.ctype, "multipart") != NULL) {
if (sstate.envelope.boundary == NULL) {
UUMessage (uuscan_id, __LINE__, UUMSG_WARNING,
uustring (S_MIME_NO_BOUNDARY));
sstate.mimestate = MS_BODY;
_FP_free (sstate.envelope.ctype);
sstate.envelope.ctype = _FP_strdup ("text/plain");
}
else {
sstate.mimestate = MS_PREAMBLE;
}
}
else {
sstate.mimestate = MS_BODY; /* just a `simple' message */
}
}
else {
/* not a folder after all */
fseek (datei, prevpos, SEEK_SET);
sstate.isfolder = 0;
sstate.ismime = 0;
}
}
if (feof (datei) || ferror (datei)) { /* oops */
_FP_free (result);
return NULL;
}
/*
* Handle MIME stuff
*/
/*
* Read Preamble. This must be ended by a sstate.envelope.boundary line.
* If uu_usepreamble is set, we produce a result from this one
*/
if (sstate.ismime && sstate.mimestate == MS_PREAMBLE) {
result->startpos = ftell (datei); /* remember start of preamble */
prevpos = ftell (datei);
preheaders = ftell (datei);
blen = strlen (sstate.envelope.boundary);
lcount = 0;
while (!feof (datei)) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
if (line[0] == '-' && line[1] == '-' &&
strncmp (line+2, sstate.envelope.boundary, blen) == 0)
break;
if (!IsLineEmpty (line))
lcount++;
prevpos = ftell (datei);
}
if (feof (datei) || ferror (datei)) {
UUMessage (uuscan_id, __LINE__, UUMSG_WARNING,
uustring (S_MIME_B_NOT_FOUND));
/*
* restart and try again; don't restart if uu_fast_scanning
*/
sstate.isfolder = 0;
sstate.ismime = 0;
sstate.mimestate = MS_BODY;
if (!uu_fast_scanning) {
*errcode = UURET_CONT;
fseek (datei, preheaders, SEEK_SET);
}
_FP_free (result);
return NULL;
}
if (line[0] == '-' && line[1] == '-' &&
strncmp (line+2, sstate.envelope.boundary, blen) == 0) {
ptr1 = line + 2 + blen;
if (*ptr1 == '-' && *(ptr1+1) == '-') {
/* Empty Multipart Message. Duh. */
sstate.mimestate = MS_EPILOGUE;
}
else {
sstate.mimestate = MS_SUBPART;
}
}
else { /* shouldn't happen */
UUMessage (uuscan_id, __LINE__, UUMSG_WARNING,
uustring (S_MIME_B_NOT_FOUND));
/*
* restart and try again; don't restart if uu_fast_scanning
*/
sstate.isfolder = 0;
sstate.ismime = 0;
sstate.mimestate = MS_BODY;
if (!uu_fast_scanning) {
*errcode = UURET_CONT;
fseek (datei, preheaders, SEEK_SET);
}
_FP_free (result);
return NULL;
}
/* produce result if uu_usepreamble is set */
if (uu_usepreamble && lcount) {
sprintf (line, "%04d.txt", ++mimseqno);
result->subject = _FP_strdup (sstate.envelope.subject);
result->filename = _FP_strdup (line);
result->origin = _FP_strdup (sstate.envelope.from);
result->mimeid = _FP_strdup (sstate.envelope.mimeid);
result->mimetype = _FP_strdup ("text/plain");
result->mode = 0644;
result->uudet = PT_ENCODED; /* plain text */
result->sfname = _FP_strdup (fname);
result->flags = FL_SINGLE | FL_PROPER;
/* result->startpos set from above */
result->length = prevpos - result->startpos;
result->partno = 1;
/* MIME message, let's continue */
*errcode = UURET_CONT;
if ((sstate.envelope.subject != NULL && result->subject == NULL) ||
result->filename == NULL || result->sfname == NULL) {
*errcode = UURET_NOMEM;
}
return result;
}
/* MIME message, let's continue */
if (*errcode == UURET_OK)
*errcode = UURET_CONT;
/* otherwise, just return NULL */
_FP_free (result);
return NULL;
}
/*
* Read Epilogue, the plain text after the last boundary.
* This can either end with new headers from the next message of a
* mail folder or with a `parent' boundary if we are inside an
* encapsulated Multipart message. Oh yes, and of course the file
* may also simply end :-)
* Another possibility is that we might find plain encoded data
* without encapsulating message. We're not _too_ flexible here,
* we won't detect Base64, and require a proper `begin' line for
* uuencoding and xxencoding
* If uu_usepreamble is set, we produce a result from this one
*/
if (sstate.ismime && sstate.mimestate == MS_EPILOGUE) {
result->startpos = ftell (datei); /* remember start of epilogue */
prevpos = ftell (datei);
preheaders = ftell (datei);
preenc = ftell (datei);
hcount = lcount = 0;
ecount = bhflag = 0;
begflag = vflag = 0;
res = 0;
/*
* If we are in the outermost message and uu_fast_scanning, we
* know (or assume) that no more messages will follow, so there's
* no need to scan the rest.
*/
if (uu_fast_scanning && mssdepth == 0) {
/*
* check if the epilogue is empty
*/
while (!feof (datei) && !ferror (datei) && lcount<10 && res==0) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (!IsLineEmpty (line))
res++;
lcount++;
}
if (uu_usepreamble && res) {
sprintf (line, "%04d.txt", ++mimseqno);
result->subject = _FP_strdup (sstate.envelope.subject);
result->filename = _FP_strdup (line);
result->origin = _FP_strdup (sstate.envelope.from);
result->mimeid = _FP_strdup (sstate.envelope.mimeid);
result->mimetype = _FP_strdup ("text/plain");
result->mode = 0644;
result->uudet = PT_ENCODED; /* plain text */
result->sfname = _FP_strdup (fname);
result->flags = FL_SINGLE | FL_PROPER | FL_TOEND;
result->partno = 1;
/* result->startpos set from above */
result->length = progress.fsize - result->startpos;
if ((sstate.envelope.subject != NULL && result->subject == NULL) ||
result->filename == NULL || result->sfname == NULL) {
*errcode = UURET_NOMEM;
}
return result;
}
_FP_free (result);
return NULL;
}
if (mssdepth > 0)
blen = strlen (multistack[mssdepth-1].envelope.boundary);
while (!feof (datei)) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
/* check for parent boundary */
if (mssdepth > 0 && line[0] == '-' && line[1] == '-' &&
strncmp (line+2,
multistack[mssdepth-1].envelope.boundary, blen) == 0)
break;
/* check for next headers only at outermost level */
if (mssdepth == 0 && IsKnownHeader (line)) {
(void) ScanHeaderLine (datei, line);
if (hcount == 0) {
preheaders = prevpos;
lcount = 0;
}
hcount++;
lcount++;
if (hcount >= hlcount.restart) {
/* okay, new headers */
break;
}
}
else if (lcount > WAITHEADER) {
hcount = 0;
lcount = 0;
}
else if (hcount) {
lcount++;
}
else {
hcount = lcount = 0;
}
/* check for begin and encoded data only at outermost level */
if (mssdepth == 0 && !uu_more_mime) {
if (strncmp (line, "begin ", 6) == 0 ||
_FP_strnicmp (line, "<pre>begin ", 11) == 0) {
preenc = prevpos;
begflag = 1;
}
else if (strncmp (line, "end", 3) == 0 && begflag) {
ecount = ELC_COUNT;
break;
}
else if ((vflag = UUValidData (line, 0, &bhflag)) != 0) {
if (vflag == BH_ENCODED && bhflag == 0) {
/* very short BinHex file follows */
preenc = prevpos;
break;
}
/* remember that XX can easily be mistaken as Base64 */
if ((vflag == UU_ENCODED || vflag == XX_ENCODED || vflag == B64ENCODED) && begflag) {
if (++ecount >= ELC_COUNT)
break;
}
else {
begflag = 0;
ecount = 0;
}
}
else {
begflag = 0;
ecount = 0;
}
}
if (!IsLineEmpty (line))
res++;
prevpos = ftell (datei);
}
if (mssdepth > 0 && line[0] == '-' && line[1] == '-' &&
strncmp (line+2,
multistack[mssdepth-1].envelope.boundary, blen) == 0) {
/* restore previous state */
mssdepth--;
UUkillheaders (&sstate.envelope);
_FP_free (sstate.source);
memcpy (&sstate, &(multistack[mssdepth]), sizeof (scanstate));
ptr1 = line + 2 + strlen (sstate.envelope.boundary);
if (*ptr1 == '-' && *(ptr1+1) == '-') {
sstate.mimestate = MS_EPILOGUE;
}
else {
sstate.mimestate = MS_SUBPART;
}
result->length = prevpos - result->startpos;
*errcode = UURET_CONT;
}
else if (mssdepth > 0) {
UUMessage (uuscan_id, __LINE__, UUMSG_WARNING,
uustring (S_MIME_B_NOT_FOUND));
/*
* restart and try again; don't restart if uu_fast_scanning
*/
sstate.isfolder = 0;
sstate.ismime = 0;
sstate.mimestate = MS_BODY;
while (mssdepth) {
mssdepth--;
UUkillheaders (&(multistack[mssdepth].envelope));
_FP_free (multistack[mssdepth].source);
}
if (!uu_fast_scanning) {
*errcode = UURET_CONT;
fseek (datei, preheaders, SEEK_SET);
}
_FP_free (result);
return NULL;
}
else if (IsKnownHeader (line)) {
/* new message follows */
sstate.isfolder = 1;
sstate.ismime = 0;
sstate.mimestate = MS_HEADERS;
result->length = preheaders - result->startpos;
fseek (datei, preheaders, SEEK_SET);
}
else if (ecount >= ELC_COUNT) {
/* new plain encoding */
sstate.isfolder = 0;
sstate.ismime = 0;
sstate.mimestate = MS_BODY;
result->length = preenc - result->startpos;
fseek (datei, preenc, SEEK_SET);
}
/* produce result if uu_usepreamble is set */
if (uu_usepreamble && res) {
sprintf (line, "%04d.txt", ++mimseqno);
result->subject = _FP_strdup (sstate.envelope.subject);
result->filename = _FP_strdup (line);
result->origin = _FP_strdup (sstate.envelope.from);
result->mimeid = _FP_strdup (sstate.envelope.mimeid);
result->mimetype = _FP_strdup ("text/plain");
result->mode = 0644;
result->uudet = PT_ENCODED; /* plain text */
result->sfname = _FP_strdup (fname);
result->flags = FL_SINGLE | FL_PROPER;
result->partno = 1;
/* result->startpos set from above */
/* result->length set from above */
if ((sstate.envelope.subject != NULL && result->subject == NULL) ||
result->filename == NULL || result->sfname == NULL) {
*errcode = UURET_NOMEM;
}
return result;
}
/* otherwise, just return NULL */
_FP_free (result);
return NULL;
}
/*
* Scan a new part from a Multipart message. Check for a new local
* envelope (which defaults to `Content-Type: text/plain') and
* evaluate its Content-Type and Content-Transfer-Encoding. If this
* is another Multipart/something, push the current state onto our
* stack and dive into the new environment, starting with another
* preamble.
*/
if (sstate.ismime && sstate.mimestate == MS_SUBPART) {
memset (&localenv, 0, sizeof (headers));
result->startpos = ftell (datei);
prevpos = ftell (datei);
hcount = 0;
lcount = 0;
/*
* Duplicate some data from outer envelope
*/
localenv.mimevers = _FP_strdup (sstate.envelope.mimevers);
localenv.from = _FP_strdup (sstate.envelope.from);
localenv.subject = _FP_strdup (sstate.envelope.subject);
localenv.rcpt = _FP_strdup (sstate.envelope.rcpt);
localenv.date = _FP_strdup (sstate.envelope.date);
if ((sstate.envelope.mimevers != NULL && localenv.mimevers == NULL) ||
(sstate.envelope.from != NULL && localenv.from == NULL) ||
(sstate.envelope.subject != NULL && localenv.subject == NULL) ||
(sstate.envelope.rcpt != NULL && localenv.rcpt == NULL) ||
(sstate.envelope.date != NULL && localenv.date == NULL)) {
while (mssdepth) {
mssdepth--;
UUkillheaders (&(multistack[mssdepth].envelope));
_FP_free (multistack[mssdepth].source);
}
sstate.isfolder = 0;
sstate.ismime = 0;
UUkillheaders (&localenv);
*errcode = UURET_NOMEM;
_FP_free (result);
return NULL;
}
/* Scan subheader. But what if there is no subheader? */
hcount = 0;
lcount = 0;
preheaders = prevpos;
if (_FP_fgets (line, 1024, datei) == NULL) {
sstate.isfolder = 0;
sstate.ismime = 0;
while (mssdepth) {
mssdepth--;
UUkillheaders (&(multistack[mssdepth].envelope));
_FP_free (multistack[mssdepth].source);
}
UUkillheaders (&localenv);
_FP_free (result);
return NULL;
}
while (!feof (datei) && !IsLineEmpty (line)) {
if (IsKnownHeader (line))
hcount++;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
if (lcount > WAITHEADER && hcount == 0) {
fseek (datei, preheaders, SEEK_SET);
prevpos = preheaders;
break;
}
ptr1 = ScanHeaderLine (datei, line);
if (ParseHeader (&localenv, ptr1) == NULL)
*errcode = UURET_NOMEM;
if (line[0] == '-' && line[1] == '-')
break;
prevpos = ftell (datei);
if (_FP_fgets (line, 1024, datei) == NULL)
break;
lcount++;
}
if (line[0] == '-' && line[1] == '-') {
/*
* this shouldn't happen, there must always be an empty line,
* but let's accept it anyway. Just skip back to before the
* boundary, so that it gets handled below
*/
fseek (datei, prevpos, SEEK_SET);
}
if (_FP_stristr (localenv.ctype, "multipart") != NULL) {
/* oh no, not again */
if (mssdepth >= MSMAXDEPTH) {
/* Argh, what an isane message. Treat as plain text */
UUMessage (uuscan_id, __LINE__, UUMSG_WARNING,
uustring (S_MIME_MULTI_DEPTH));
}
else if (localenv.boundary == NULL) {
UUMessage (uuscan_id, __LINE__, UUMSG_WARNING,
uustring (S_MIME_NO_BOUNDARY));
}
else {
memcpy (&multistack[mssdepth], &sstate, sizeof (scanstate));
memcpy (&sstate.envelope, &localenv, sizeof (headers));
memset (&localenv, 0, sizeof (headers));
sstate.mimestate = MS_PREAMBLE;
if ((sstate.source = _FP_strdup (sstate.source)) == NULL)
*errcode = UURET_NOMEM;
if (*errcode == UURET_OK)
*errcode = UURET_CONT;
mssdepth++;
/* need a restart */
_FP_free (result);
return NULL;
}
}
/*
* So this subpart is either plain text or something else. Check
* the Content-Type and Content-Transfer-Encoding. If the latter
* is a defined value, we know what to do and just copy everything
* up to the boundary.
* If Content-Transfer-Encoding is unknown or missing, look at the
* Content-Type. If it's "text/plain" or undefined, we subject the
* message to our encoding detection. Otherwise, treat as plain
* text.
* This is done because users might `attach' a uuencoded file, which
* would then be correctly typed as `text/plain'.
*/
if (_FP_stristr (localenv.ctenc, "base64") != NULL)
result->uudet = B64ENCODED;
else if (_FP_stristr (localenv.ctenc, "x-uue") != NULL) {
result->uudet = UU_ENCODED;
result->begin = result->end = 1;
}
else if (_FP_stristr (localenv.ctenc, "x-yenc") != NULL) {
result->uudet = YENC_ENCODED;
result->begin = result->end = 1;
}
else if (_FP_stristr (localenv.ctenc, "quoted-printable") != NULL)
result->uudet = QP_ENCODED;
else if (_FP_stristr (localenv.ctenc, "7bit") != NULL ||
_FP_stristr (localenv.ctenc, "8bit") != NULL)
result->uudet = PT_ENCODED;
else if (_FP_stristr (localenv.ctype, "multipart") != NULL ||
_FP_stristr (localenv.ctype, "message") != NULL)
result->uudet = PT_ENCODED;
/*
* If we're switched to MIME-only mode, handle as text
*/
if (uu_more_mime >= 2 && !result->uudet) {
result->uudet = PT_ENCODED;
}
if (result->uudet) {
/*
* Oh-kay, go ahead. Just read and wait for the boundary
*/
result->startpos = ftell (datei);
prevpos = ftell (datei);
blen = strlen (sstate.envelope.boundary);
lcount = 0;
while (!feof (datei)) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
line[255] = '\0';
if (line[0] == '-' && line[1] == '-' &&
strncmp (line+2, sstate.envelope.boundary, blen) == 0)
break;
/*
* I've had a report of someone who tried to decode a huge file
* that had an early truncated multipart message and later another
* multipart message with the *same* boundary. Consequently, all
* some hundred messages inbetween were ignored ...
* This check here doesn't cover folded header lines, but we don't
* want to slow down scanning too much. We just check for
* Content-Type: multipart/... boundary="same-boundary"
*/
if (line[0] == 'C' && line[1] == 'o' &&
_FP_strnicmp (line, "Content-Type:", 13) == 0) {
ptr1 = ScanHeaderLine (datei, line);
ptr2 = (ptr1)?_FP_stristr(ptr1,"boundary"):NULL;
ptr1 = (ptr2)?ParseValue(ptr2):NULL;
if (ptr1 && strcmp (ptr1, sstate.envelope.boundary) == 0)
break;
for (res=0; ptr1 && res<mssdepth; res++)
if (strcmp (ptr1, multistack[res].envelope.boundary) == 0)
break;
if (res<mssdepth)
break;
}
if (!IsLineEmpty (line))
lcount++;
prevpos = ftell (datei);
}
if (line[0] == '-' && line[1] == '-' &&
strncmp (line+2, sstate.envelope.boundary, blen) == 0) {
ptr1 = line + 2 + blen;
if (*ptr1 == '-' && *(ptr1+1) == '-')
sstate.mimestate = MS_EPILOGUE;
else
sstate.mimestate = MS_SUBPART;
}
else {
UUMessage (uuscan_id, __LINE__, UUMSG_WARNING,
uustring (S_MIME_B_NOT_FOUND));
while (mssdepth) {
mssdepth--;
UUkillheaders (&(multistack[mssdepth].envelope));
_FP_free (multistack[mssdepth].source);
}
/*
* Don't retry if uu_fast_scanning
*/
if (uu_fast_scanning) {
UUkillheaders (&localenv);
sstate.isfolder = 0;
sstate.ismime = 0;
sstate.mimestate = MS_BODY;
_FP_free (result);
return NULL;
}
/*
* Retry, but listening to headers this time
*/
fseek (datei, result->startpos, SEEK_SET);
UUkillfread (result);
if ((result = (fileread *) malloc (sizeof (fileread))) == NULL) {
*errcode = UURET_NOMEM;
sstate.isfolder = 0;
sstate.ismime = 0;
UUkillheaders (&localenv);
return NULL;
}
memset (result, 0, sizeof (fileread));
if ((res = ScanData (datei, fname, errcode, NULL, 1, 1, result))==-1) {
/* oops, something went wrong */
sstate.isfolder = 0;
sstate.ismime = 0;
UUkillfread (result);
UUkillheaders (&localenv);
return NULL;
}
if (res == 1) {
/*
* new headers found
*/
sstate.isfolder = 1;
sstate.ismime = 0;
sstate.mimestate = MS_HEADERS;
}
else {
sstate.isfolder = 0;
sstate.ismime = 0;
}
}
/* produce result if uu_handletext is set */
/* or if the file is explicitely named */
if (result->uudet == B64ENCODED || lcount) {
if (localenv.fname) {
_FP_free (result->filename);
if ((result->filename = _FP_strdup (localenv.fname)) == NULL)
*errcode = UURET_NOMEM;
}
else if ((result->uudet==QP_ENCODED||result->uudet==PT_ENCODED) &&
result->filename == NULL && uu_handletext) {
sprintf (line, "%04d.txt", ++mimseqno);
if ((result->filename = _FP_strdup (line)) == NULL)
*errcode = UURET_NOMEM;
}
result->subject = _FP_strdup (localenv.subject);
result->origin = _FP_strdup (localenv.from);
result->mimeid = _FP_strdup (localenv.mimeid);
result->mimetype = _FP_strdup (localenv.ctype);
result->mode = 0644;
result->sfname = _FP_strdup (fname);
result->flags = FL_SINGLE | FL_PROPER;
result->partno = 1;
/* result->uudet determined above */
/* result->startpos set from above */
result->length = prevpos - result->startpos;
if ((localenv.subject != NULL && result->subject == NULL) ||
result->filename == NULL || result->sfname == NULL) {
*errcode = UURET_NOMEM;
}
}
else {
/* don't produce a result */
_FP_free (result);
result = NULL;
}
if (*errcode == UURET_OK)
*errcode = UURET_CONT;
/*
* destroy local envelope
*/
UUkillheaders (&localenv);
return result;
}
/*
* we're in a subpart, but the local headers don't give us any
* clue about what's to find here. So look for encoded data by
* ourselves.
*/
if ((res = ScanData (datei, fname, errcode,
sstate.envelope.boundary,
1, 0, result)) == -1) {
/* oops, something went wrong */
sstate.isfolder = 0;
sstate.ismime = 0;
UUkillfread (result);
UUkillheaders (&localenv);
return NULL;
}
/*
* we should really be at a boundary here, but check again
*/
blen = strlen (sstate.envelope.boundary);
prevpos = ftell (datei);
while (!feof (datei)) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
if (line[0] == '-' && line[1] == '-' &&
strncmp (line+2, sstate.envelope.boundary, blen) == 0)
break;
if (line[0] == 'C' && line[1] == 'o' &&
_FP_strnicmp (line, "Content-Type:", 13) == 0) {
ptr1 = ScanHeaderLine (datei, line);
ptr2 = (ptr1)?_FP_stristr(ptr1,"boundary"):NULL;
ptr1 = (ptr2)?ParseValue(ptr2):NULL;
if (ptr1 && strcmp (ptr1, sstate.envelope.boundary) == 0)
break;
}
prevpos = ftell (datei);
}
/*
* check if this was the last subpart
*/
if (line[0] == '-' && line[1] == '-' &&
strncmp (line+2, sstate.envelope.boundary, blen) == 0) {
ptr1 = line + 2 + blen;
if (*ptr1 == '-' && *(ptr1+1) == '-')
sstate.mimestate = MS_EPILOGUE;
else
sstate.mimestate = MS_SUBPART;
}
else {
UUMessage (uuscan_id, __LINE__, UUMSG_WARNING,
uustring (S_MIME_B_NOT_FOUND));
while (mssdepth) {
mssdepth--;
UUkillheaders (&(multistack[mssdepth].envelope));
_FP_free (multistack[mssdepth].source);
}
if (uu_fast_scanning) {
UUkillheaders (&localenv);
sstate.isfolder = 0;
sstate.ismime = 0;
sstate.mimestate = MS_BODY;
_FP_free (result);
return NULL;
}
/*
* Retry, listening to headers this time
*/
fseek (datei, result->startpos, SEEK_SET);
UUkillfread (result);
if ((result = (fileread *) malloc (sizeof (fileread))) == NULL) {
*errcode = UURET_NOMEM;
sstate.isfolder = 0;
sstate.ismime = 0;
UUkillheaders (&localenv);
return NULL;
}
memset (result, 0, sizeof (fileread));
if ((res = ScanData (datei, fname, errcode, NULL, 1, 1, result))==-1) {
/* oops, something went wrong */
sstate.isfolder = 0;
sstate.ismime = 0;
UUkillfread (result);
UUkillheaders (&localenv);
return NULL;
}
if (res == 1) {
/*
* new headers found
*/
sstate.isfolder = 1;
sstate.ismime = 0;
sstate.mimestate = MS_HEADERS;
}
else {
sstate.isfolder = 0;
sstate.ismime = 0;
}
}
/*
* If this file has been nicely MIME so far, then be very suspicious
* if ScanData reports anything else. So do a double check, and if
* it doesn't hold up, handle as plain text instead.
*/
if (sstate.ismime && sstate.mimestate == MS_SUBPART &&
strcmp (localenv.mimevers, "1.0") == 0 &&
_FP_stristr (localenv.ctype, "text") != NULL &&
!uu_desperate) {
if (result->uudet == UU_ENCODED && !(result->begin || result->end)) {
result->uudet = 0;
}
}
/*
* produce result
*/
if (result->uudet == 0) {
result->uudet = PT_ENCODED; /* plain text */
}
if (localenv.fname) {
_FP_free (result->filename);
if ((result->filename = _FP_strdup (localenv.fname)) == NULL)
*errcode = UURET_NOMEM;
}
else if ((result->uudet==QP_ENCODED || result->uudet==PT_ENCODED) &&
result->filename==NULL && uu_handletext) {
sprintf (line, "%04d.txt", ++mimseqno);
if ((result->filename = _FP_strdup (line)) == NULL)
*errcode = UURET_NOMEM;
}
else {
/* assign a filename lateron */
}
if (result->mimetype) _FP_free (result->mimetype);
if (result->uudet) {
if (_FP_stristr (localenv.ctype, "text") != NULL &&
result->uudet != QP_ENCODED && result->uudet != PT_ENCODED)
result->mimetype = NULL; /* better don't set it */
else
result->mimetype = _FP_strdup (localenv.ctype);
}
if (result->origin) _FP_free (result->origin);
result->origin = _FP_strdup (localenv.from);
if (result->subject) _FP_free (result->subject);
result->subject = _FP_strdup (localenv.subject);
if (result->sfname == NULL)
if ((result->sfname = _FP_strdup (fname)) == NULL)
*errcode = UURET_NOMEM;
result->length = prevpos - result->startpos;
result->flags = FL_SINGLE | FL_PROPER;
result->partno = 1;
if (result->mode == 0)
result->mode = 0644;
/*
* the other fields should already be set appropriately
*/
if (*errcode == UURET_OK)
*errcode = UURET_CONT;
/*
* kill local envelope
*/
UUkillheaders (&localenv);
return result;
}
/*
* All right, so we're not in a Multipart message. Phew, took quite
* long to figure this out. But this might still be a MIME message
* body. And if it's a message/partial, we need more special handling
*/
if (sstate.isfolder && sstate.ismime && sstate.mimestate == MS_BODY &&
_FP_stristr (sstate.envelope.ctype, "message") != NULL &&
_FP_stristr (sstate.envelope.ctype, "partial") != NULL) {
result->startpos = ftell (datei);
if (sstate.envelope.partno == 1) {
/* read local envelope */
UUkillheaders (&localenv);
memset (&localenv, 0, sizeof (headers));
/* skip over blank lines first */
prevpos = ftell (datei);
while (!feof (datei)) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
if (!IsLineEmpty (line))
break;
prevpos = ftell (datei);
}
/* Next, read header. But what if there is no subheader? */
hcount = 0;
lcount = 0;
preheaders = prevpos;
while (!feof (datei) && !IsLineEmpty (line)) {
if (IsKnownHeader (line))
hcount++;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
if (lcount > WAITHEADER && hcount == 0) {
fseek (datei, preheaders, SEEK_SET);
break;
}
ptr1 = ScanHeaderLine (datei, line);
if (ParseHeader (&localenv, ptr1) == NULL)
*errcode = UURET_NOMEM;
if (_FP_fgets (line, 1024, datei) == NULL)
break;
lcount++;
}
prevpos = ftell (datei);
/*
* Examine local header. We're mostly interested in the Content-Type
* and the Content-Transfer-Encoding.
*/
if (_FP_stristr (localenv.ctype, "multipart") != NULL) {
UUMessage (uuscan_id, __LINE__, UUMSG_WARNING,
uustring (S_MIME_PART_MULTI));
}
if (localenv.subject)
result->subject = _FP_strdup (localenv.subject);
else
result->subject = _FP_strdup (sstate.envelope.subject);
if (localenv.from)
result->origin = _FP_strdup (localenv.from);
else
result->origin = _FP_strdup (sstate.envelope.from);
if (localenv.ctype)
result->mimetype = _FP_strdup (localenv.ctype);
else
result->mimetype = _FP_strdup ("text/plain");
if (_FP_stristr (localenv.ctenc, "quoted-printable") != NULL)
result->uudet = QP_ENCODED;
else if (_FP_stristr (localenv.ctenc, "base64") != NULL)
result->uudet = B64ENCODED;
else if (_FP_stristr (localenv.ctenc, "x-uue") != NULL) {
result->uudet = UU_ENCODED;
result->begin = result->end = 1;
}
else if (_FP_stristr (localenv.ctenc, "x-yenc") != NULL) {
result->uudet = YENC_ENCODED;
result->begin = result->end = 1;
}
else if (_FP_stristr (localenv.ctenc, "7bit") != NULL ||
_FP_stristr (localenv.ctenc, "8bit") != NULL)
result->uudet = PT_ENCODED;
else if (_FP_stristr (localenv.ctype, "multipart") != NULL ||
_FP_stristr (localenv.ctype, "message") != NULL)
result->uudet = PT_ENCODED;
/*
* If we're switched to MIME-only mode, handle as text
*/
if (uu_more_mime >= 2 && !result->uudet) {
result->uudet = PT_ENCODED;
}
}
else {
memset (&localenv, 0, sizeof (headers));
}
/*
* If this is Quoted-Printable or Plain Text, just try looking
* for the next message header. If uu_fast_scanning, and the
* encoding is known, there's no need to look below. Otherwise,
* we check the type of encoding first.
* The encoding type is determined on the first part; in all
* others, we also don't read on.
* If we have a partial multipart message, scan for headers, but
* do not react on standard MIME headers, as they are probably
* from the subparts. However, we're stuck if there's an embedded
* message/rfc822 :-(
* If it is a "trivial" (non-embedded) message/rfc822, skip over
* the message header and then start looking for the next header.
*/
if (uu_fast_scanning && (result->uudet!=0||sstate.envelope.partno!=1)) {
/* do nothing */
res = 0;
}
else if (result->uudet != 0) {
hcount = lcount = 0;
prevpos = ftell (datei);
if (_FP_stristr (localenv.ctype, "message") != NULL &&
_FP_stristr (localenv.ctype, "rfc822") != NULL) {
/*
* skip over empty lines and local header
*/
preheaders = ftell (datei);
while (!feof (datei)) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (!IsLineEmpty (line)) {
break;
}
}
while (!feof (datei) && !IsLineEmpty (line)) {
if (IsKnownHeader (line))
hcount++;
lcount++;
if (lcount > WAITHEADER && hcount < hlcount.afternl)
break;
if (_FP_fgets (line, 1024, datei) == NULL)
break;
}
if (hcount < hlcount.afternl)
fseek (datei, preheaders, SEEK_SET);
hcount = lcount = 0;
}
/*
* look for next header
*/
while (!feof (datei)) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
if (ferror (datei))
break;
if ((vflag = IsKnownHeader (line))) {
(void) ScanHeaderLine (datei, line);
if (result->uudet != PT_ENCODED || vflag == 1) {
if (hcount == 0)
preheaders = prevpos;
hcount++;
lcount++;
if (hcount >= hlcount.restart) {
/*
* Hey, a new header starts here
*/
fseek (datei, preheaders, SEEK_SET);
prevpos = preheaders;
break;
}
}
}
else if (lcount > WAITHEADER) {
hcount = 0;
lcount = 0;
}
else if (hcount) {
lcount++;
}
prevpos = ftell (datei);
}
res = 1;
}
else {
/*
* Otherwise, let's see what we can find ourself. No
* boundary (NULL) but MIME, and respect new headers.
*/
if ((res = ScanData (datei, fname, errcode, NULL, 1, 1, result)) == -1) {
/* oops, something went wrong */
sstate.isfolder = 0;
sstate.ismime = 0;
UUkillfread (result);
UUkillheaders (&localenv);
return NULL;
}
if (result->uudet == 0 && uu_handletext)
result->uudet = PT_ENCODED;
prevpos = ftell (datei);
}
/*
* produce result
*/
if (localenv.fname) {
_FP_free (result->filename);
if ((result->filename = _FP_strdup (localenv.fname)) == NULL)
*errcode = UURET_NOMEM;
}
else if (sstate.envelope.fname) {
_FP_free (result->filename);
if ((result->filename = _FP_strdup (sstate.envelope.fname)) == NULL)
*errcode = UURET_NOMEM;
}
else if ((result->uudet==QP_ENCODED || result->uudet==PT_ENCODED) &&
result->filename == NULL) {
sprintf (line, "%04d.txt", ++mimseqno);
if ((result->filename = _FP_strdup (line)) == NULL)
*errcode = UURET_NOMEM;
}
else {
/* assign a filename lateron */
}
if (result->subject == NULL) {
if (sstate.envelope.subject)
result->subject = _FP_strdup (sstate.envelope.subject);
}
result->partno = sstate.envelope.partno;
result->maxpno = sstate.envelope.numparts;
result->flags = FL_PARTIAL |
((res==1 || uu_fast_scanning) ? FL_PROPER : 0) |
((uu_fast_scanning) ? FL_TOEND : 0);
result->mimeid = _FP_strdup (sstate.envelope.mimeid);
if (result->partno == 1)
result->begin = 1;
if (uu_fast_scanning)
result->length = progress.fsize - result->startpos;
else
result->length = prevpos - result->startpos;
if (result->sfname == NULL)
result->sfname = _FP_strdup (fname);
if (result->mode == 0)
result->mode = 0644;
/*
* the other fields should already be set appropriately
*/
if (res == 1) {
/*
* new headers found
*/
sstate.isfolder = 1;
sstate.ismime = 0;
sstate.mimestate = MS_HEADERS;
UUkillheaders (&sstate.envelope);
memset (&sstate.envelope, 0, sizeof (headers));
}
else {
/*
* otherwise, this can't be a mail folder
*/
sstate.isfolder = 0;
sstate.ismime = 0;
}
/*
* kill local envelope
*/
UUkillheaders (&localenv);
return result;
}
/*
* If this is a MIME body, honor a Content-Type different than
* text/plain or a proper Content-Transfer-Encoding.
* We also go in here if we have an assigned filename - this means
* that we've had a Content-Disposition field, and we should probably
* decode a plain-text segment with a filename.
*/
if (sstate.isfolder && sstate.ismime &&
sstate.mimestate == MS_BODY &&
(_FP_stristr (sstate.envelope.ctenc, "quoted-printable") != NULL ||
_FP_stristr (sstate.envelope.ctenc, "base64") != NULL ||
_FP_stristr (sstate.envelope.ctenc, "x-uue") != NULL ||
_FP_stristr (sstate.envelope.ctenc, "x-yenc") != NULL ||
_FP_stristr (sstate.envelope.ctype, "message") != NULL ||
sstate.envelope.fname != NULL)) {
if (sstate.envelope.subject)
result->subject = _FP_strdup (sstate.envelope.subject);
if (sstate.envelope.from)
result->origin = _FP_strdup (sstate.envelope.from);
if (sstate.envelope.ctype)
result->mimetype = _FP_strdup (sstate.envelope.ctype);
else
result->mimetype = _FP_strdup ("text/plain");
if (_FP_stristr (sstate.envelope.ctenc, "quoted-printable") != NULL)
result->uudet = QP_ENCODED;
else if (_FP_stristr (sstate.envelope.ctenc, "base64") != NULL)
result->uudet = B64ENCODED;
else if (_FP_stristr (sstate.envelope.ctenc, "x-uue") != NULL) {
result->uudet = UU_ENCODED;
result->begin = result->end = 1;
}
else if (_FP_stristr (sstate.envelope.ctenc, "x-yenc") != NULL) {
result->uudet = YENC_ENCODED;
}
else if (_FP_stristr (sstate.envelope.ctenc, "7bit") != NULL ||
_FP_stristr (sstate.envelope.ctenc, "8bit") != NULL)
result->uudet = PT_ENCODED;
else if (_FP_stristr (sstate.envelope.ctype, "multipart") != NULL ||
_FP_stristr (sstate.envelope.ctype, "message") != NULL ||
sstate.envelope.fname != NULL)
result->uudet = PT_ENCODED;
/*
* If we're switched to MIME-only mode, handle as text
*/
if (uu_more_mime >= 2 && !result->uudet) {
result->uudet = PT_ENCODED;
}
result->startpos = prevpos = ftell (datei);
/*
* If this is Quoted-Printable or Plain Text, just try looking
* for the next message header. If uu_fast_scanning, we know
* there won't be more headers.
* If it is a "trivial" (non-embedded) message/rfc822, skip over
* the message header and then start looking for the next header.
*/
if (result->uudet != 0 && uu_fast_scanning) {
/* do nothing */
res = 0;
}
else if (result->uudet != 0) {
hcount = lcount = 0;
prevpos = ftell (datei);
if (_FP_stristr (sstate.envelope.ctype, "message") != NULL &&
_FP_stristr (sstate.envelope.ctype, "rfc822") != NULL) {
/*
* skip over empty lines and local header
*/
preheaders = ftell (datei);
while (!feof (datei)) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (!IsLineEmpty (line)) {
break;
}
}
while (!feof (datei) && !IsLineEmpty (line)) {
if (IsKnownHeader (line))
hcount++;
lcount++;
if (lcount > WAITHEADER && hcount < hlcount.afternl)
break;
if (_FP_fgets (line, 1024, datei) == NULL)
break;
}
if (hcount < hlcount.afternl)
fseek (datei, preheaders, SEEK_SET);
hcount = lcount = 0;
}
/*
* look for next header
*/
while (!feof (datei)) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
if (ferror (datei))
break;
if (IsKnownHeader (line)) {
(void) ScanHeaderLine (datei, line);
if (hcount == 0)
preheaders = prevpos;
hcount++;
lcount++;
if (hcount >= hlcount.restart) {
/*
* Hey, a new header starts here
*/
fseek (datei, preheaders, SEEK_SET);
prevpos = preheaders;
break;
}
}
else if (lcount > WAITHEADER) {
hcount = 0;
lcount = 0;
}
else if (hcount) {
lcount++;
}
prevpos = ftell (datei);
}
res = 1;
}
else {
/*
* Otherwise, let's see what we can find ourself. No
* boundary (NULL) but MIME, and respect new headers.
*/
if ((res = ScanData (datei, fname, errcode, NULL, 1, 1, result)) == -1) {
/* oops, something went wrong */
sstate.isfolder = 0;
sstate.ismime = 0;
UUkillfread (result);
return NULL;
}
if (result->uudet == 0 && uu_handletext) {
result->startpos = before; /* display headers */
result->uudet = PT_ENCODED;
}
prevpos = ftell (datei);
}
/*
* produce result
*/
if (sstate.envelope.fname) {
_FP_free (result->filename);
if ((result->filename = _FP_strdup (sstate.envelope.fname)) == NULL)
*errcode = UURET_NOMEM;
}
else if ((result->uudet==QP_ENCODED||result->uudet==PT_ENCODED) &&
result->filename == NULL) {
sprintf (line, "%04d.txt", ++mimseqno);
if ((result->filename = _FP_strdup (line)) == NULL)
*errcode = UURET_NOMEM;
}
else {
/* assign a filename lateron */
}
if (result->subject == NULL) {
if (sstate.envelope.subject)
result->subject = _FP_strdup (sstate.envelope.subject);
}
result->flags = ((res==1||uu_fast_scanning)?FL_PROPER:0) |
((uu_fast_scanning) ? FL_TOEND : 0);
result->mimeid = _FP_strdup (sstate.envelope.mimeid);
if (uu_fast_scanning)
result->length = progress.fsize - result->startpos;
else
result->length = prevpos - result->startpos;
if (result->sfname == NULL)
result->sfname = _FP_strdup (fname);
if (result->mode == 0)
result->mode = 0644;
/*
* the other fields should already be set appropriately
*/
if (res == 1) {
/*
* new headers found
*/
sstate.isfolder = 1;
sstate.ismime = 0;
sstate.mimestate = MS_HEADERS;
UUkillheaders (&sstate.envelope);
memset (&sstate.envelope, 0, sizeof (headers));
}
else {
/*
* otherwise, this can't be a mail folder
*/
sstate.isfolder = 0;
sstate.ismime = 0;
}
return result;
}
/*
* Some files have reduced headers, and what should be a multipart
* message is missing the proper Content-Type. If the first thing
* we find after a couple of empty lines is a boundary, try it!
* But make sure that this is indeed intended as being a boundary.
*
* Only accept it if there was indeed no Content-Type header line
* and if the following line is a proper Content-Type header. BTW,
* we know that sstate.envelope.boundary is NULL, or we wouldn't
* be here!
*/
if ((!sstate.envelope.ctype || _FP_stristr (sstate.envelope.ctype, "multipart"))
&& !uu_more_mime) {
prevpos = ftell (datei);
while (!feof (datei)) {
if (_FP_fgets (line, 1024, datei) == NULL)
break;
if (UUBUSYPOLL(ftell(datei),progress.fsize)) SPCANCEL();
if (!IsLineEmpty (line))
break;
}
if (line[0] == '-' && line[1] == '-' &&
!IsLineEmpty (line+2) && !feof (datei)) {
ptr1 = _FP_strrstr (line+2, "--");
ptr2 = ScanHeaderLine (datei, NULL);
if ((ptr1 == NULL || ptr1[2]) &&
ptr2 && _FP_strnicmp (ptr2, "Content-", 8) == 0) {
/*
* hmm, okay, let's do it!
*/
sstate.isfolder = 1;
sstate.ismime = 1;
sstate.mimestate = MS_PREAMBLE;
/*
* get boundary
*/
ptr1 = line+2;
while (*ptr1 && !isspace(*ptr1))
ptr1++;
*ptr1 = '\0';
sstate.envelope.mimevers = _FP_strdup ("1.0");
sstate.envelope.boundary = _FP_strdup (line+2);
/*
* need restart
*/
fseek (datei, prevpos, SEEK_SET);
_FP_free (result);
return NULL;
}
}
fseek (datei, prevpos, SEEK_SET);
}
/*
* Hmm, we're not in a ''special'' state, so it's more or less
* Freestyle time. Anyway, if this seems to be a Mime message,
* don't allow the minimal Base64 handling.
*/
if (sstate.envelope.subject)
result->subject = _FP_strdup (sstate.envelope.subject);
if (sstate.envelope.from)
result->origin = _FP_strdup (sstate.envelope.from);
if (sstate.envelope.ctype)
result->mimetype = _FP_strdup (sstate.envelope.ctype);
if ((res=ScanData (datei, fname, errcode, NULL,
sstate.ismime, 1, result))==-1) {
/* oops, something went wrong */
sstate.isfolder = 0;
sstate.ismime = 0;
UUkillfread (result);
return NULL;
}
/*
* produce result
*/
if (result->uudet == 0 && uu_handletext) {
result->startpos = before; /* display headers */
result->uudet = PT_ENCODED;
result->partno = 1;
}
if (result->uudet == YENC_ENCODED && result->filename != NULL) {
/*
* prevent replacing the filename found on the =ybegin line
*/
}
else if (sstate.envelope.fname) {
_FP_free (result->filename);
if ((result->filename = _FP_strdup (sstate.envelope.fname)) == NULL)
*errcode = UURET_NOMEM;
}
else if ((result->uudet==QP_ENCODED||result->uudet==PT_ENCODED) &&
result->filename == NULL) {
sprintf (line, "%04d.txt", ++mimseqno);
if ((result->filename = _FP_strdup (line)) == NULL)
*errcode = UURET_NOMEM;
}
else {
/* assign a filename lateron */
}
if (result->subject == NULL) {
if (sstate.envelope.subject)
result->subject = _FP_strdup (sstate.envelope.subject);
}
result->flags = (result->uudet==PT_ENCODED)?FL_SINGLE:0;
result->mimeid = _FP_strdup (sstate.envelope.mimeid);
result->length = ftell (datei) - result->startpos;
if (result->mode == 0)
result->mode = 0644;
if (result->sfname == NULL)
result->sfname = _FP_strdup (fname);
if (res == 1) {
/*
* new headers found
*/
sstate.isfolder = 1;
sstate.ismime = 0;
sstate.mimestate = MS_HEADERS;
UUkillheaders (&sstate.envelope);
memset (&sstate.envelope, 0, sizeof (headers));
}
else {
/*
* otherwise, this can't be a mail folder
*/
sstate.isfolder = 0;
sstate.ismime = 0;
}
return result;
/*
* Emergency handling. Set errcode before jumping here.
*/
ScanPartEmergency:
UUkillfread (result);
UUkillheaders (&localenv);
while (mssdepth) {
mssdepth--;
UUkillheaders (&(multistack[mssdepth].envelope));
_FP_free (multistack[mssdepth].source);
}
return NULL;
}