126 lines
2.5 KiB
C
126 lines
2.5 KiB
C
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/*
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** Copyright 1998 - 1999 Double Precision, Inc. See COPYING for
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** distribution information.
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "rfc2045.h"
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#if HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#ifdef __WINDOWS__
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#define strncasecmp strnicmp
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#include <io.h>
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#define read _read
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#define lseek _lseek
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#endif
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/* $Id$ */
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extern void rfc2045_add_buf( char **, size_t *, size_t *,
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const char *, size_t);
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static const char *boundary_chk_val;
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static size_t boundary_chk_val_len;
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static char *boundary_chk_buf;
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static size_t boundary_chk_bufsize, boundary_chk_buflen;
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static int boundary_chk_flag;
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static void boundary_chk_add(const char *p, size_t l)
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{
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if (boundary_chk_buflen < boundary_chk_val_len+20)
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rfc2045_add_buf( &boundary_chk_buf,
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&boundary_chk_bufsize,
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&boundary_chk_buflen, p, l);
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}
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static int boundary_chk(const char *p, size_t l, void *ptr)
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{
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static size_t i, j;
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for (j=i=0; i<l; i++)
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{
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if (p[i] == '\n')
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{
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boundary_chk_add(p+j, i-j);
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if (boundary_chk_buflen >= boundary_chk_val_len+2 &&
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boundary_chk_buf[0] == '-' &&
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boundary_chk_buf[1] == '-' &&
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strncasecmp(boundary_chk_val,
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boundary_chk_buf+2,
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boundary_chk_val_len) == 0)
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boundary_chk_flag=1;
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boundary_chk_buflen=0;
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j=i+1;
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}
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}
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boundary_chk_add(p+j, l-j);
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return (0);
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}
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static int try_boundary(struct rfc2045 *p, int fd)
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{
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int rc;
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char buf[512];
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int n, cnt;
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off_t ps;
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if (p->firstpart)
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{
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for (p=p->firstpart; p; p=p->next)
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if ((rc=try_boundary(p, fd)) != 0)
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return (rc);
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return (0);
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}
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if (p->content_transfer_encoding &&
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strcmp(p->content_transfer_encoding, "base64") == 0)
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return (0);
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boundary_chk_flag=0;
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boundary_chk_buflen=0;
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if (lseek(fd, p->startbody, SEEK_SET) == -1) return (-1);
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rfc2045_cdecode_start(p, boundary_chk, 0);
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ps=p->startbody;
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while (ps < p->endbody)
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{
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if (p->endbody - ps < sizeof(buf))
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cnt=p->endbody-ps;
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else cnt=sizeof(buf);
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n=read(fd, buf, cnt);
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if (n <= 0) return (-1);
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rfc2045_cdecode(p, buf, n);
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ps += n;
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if (boundary_chk_flag) break;
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}
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rfc2045_cdecode_end(p);
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if (boundary_chk_buflen)
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boundary_chk("\n", 1, 0); /* Flush out partial line */
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return (boundary_chk_flag);
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}
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int rfc2045_try_boundary(struct rfc2045 *p, int fd, const char *boundary)
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{
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int n;
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boundary_chk_val_len=strlen(boundary_chk_val=boundary);
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boundary_chk_buf=0;
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boundary_chk_bufsize=0;
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n=try_boundary(p, fd);
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if (boundary_chk_buf) free(boundary_chk_buf);
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return (n);
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}
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