--- pftpx.c.orig Mon Jun 27 17:58:30 2005
+++ pftpx.c Mon Jun 27 18:01:11 2005
@@ -58,6 +58,58 @@
#define sstosa(ss) ((struct sockaddr *)(ss))
+#include <sys/types.h>
+
+#include <ctype.h>
+#include <limits.h>
+#include <string.h>
+
+#define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
+#include <sys/types.h>
+
+#define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
+#define isvisible(c) (((u_int)(c) <= UCHAR_MAX && isascii((u_char)(c)) && \
+ isgraph((u_char)(c))) || \
+ ((flag & VIS_SP) == 0 && (c) == ' ') || \
+ ((flag & VIS_TAB) == 0 && (c) == '\t') || \
+ ((flag & VIS_NL) == 0 && (c) == '\n') || \
+ ((flag & VIS_SAFE) && ((c) == '\b' || \
+ (c) == '\007' || (c) == '\r' || \
+ isgraph((u_char)(c)))))
+
+#define _VIS_H_
+
+#include <sys/types.h>
+#include <limits.h>
+
+/*
+ * to select alternate encoding format
+ */
+#define VIS_OCTAL 0x01 /* use octal \ddd format */
+#define VIS_CSTYLE 0x02 /* use \[nrft0..] where appropriate */
+
+/*
+ * to alter set of characters encoded (default is to encode all
+ * non-graphic except space, tab, and newline).
+ */
+#define VIS_SP 0x04 /* also encode space */
+#define VIS_TAB 0x08 /* also encode tab */
+#define VIS_NL 0x10 /* also encode newline */
+#define VIS_WHITE (VIS_SP | VIS_TAB | VIS_NL)
+#define VIS_SAFE 0x20 /* only encode "unsafe" characters */
+
+/*
+ * other
+ */
+#define VIS_NOSLASH 0x40 /* inhibit printing '\' */
+
+#define LIST_FIRST(head) ((head)->lh_first)
+#define LIST_END(head) NULL
+#define LIST_NEXT(elm, field) ((elm)->field.le_next)
+
+char *vis(char *, int, int, int);
+int strnvis(char *, const char *, size_t, int);
+
enum { CMD_NONE = 0, CMD_PORT, CMD_EPRT, CMD_PASV, CMD_EPSV };
struct session {
@@ -1037,3 +1089,143 @@
"[-p address] [-q queue] [-t timeout]\n", __progname);
exit(1);
}
+
+
+/*
+ * vis - visually encode characters
+ */
+char *
+vis(dst, c, flag, nextc)
+ register char *dst;
+ int c, nextc;
+ register int flag;
+{
+ if (isvisible(c)) {
+ *dst++ = c;
+ if (c == '\\' && (flag & VIS_NOSLASH) == 0)
+ *dst++ = '\\';
+ *dst = '\0';
+ return (dst);
+ }
+
+ if (flag & VIS_CSTYLE) {
+ switch(c) {
+ case '\n':
+ *dst++ = '\\';
+ *dst++ = 'n';
+ goto done;
+ case '\r':
+ *dst++ = '\\';
+ *dst++ = 'r';
+ goto done;
+ case '\b':
+ *dst++ = '\\';
+ *dst++ = 'b';
+ goto done;
+ case '\a':
+ *dst++ = '\\';
+ *dst++ = 'a';
+ goto done;
+ case '\v':
+ *dst++ = '\\';
+ *dst++ = 'v';
+ goto done;
+ case '\t':
+ *dst++ = '\\';
+ *dst++ = 't';
+ goto done;
+ case '\f':
+ *dst++ = '\\';
+ *dst++ = 'f';
+ goto done;
+ case ' ':
+ *dst++ = '\\';
+ *dst++ = 's';
+ goto done;
+ case '\0':
+ *dst++ = '\\';
+ *dst++ = '0';
+ if (isoctal(nextc)) {
+ *dst++ = '0';
+ *dst++ = '0';
+ }
+ goto done;
+ }
+ }
+ if (((c & 0177) == ' ') || (flag & VIS_OCTAL)) {
+ *dst++ = '\\';
+ *dst++ = ((u_char)c >> 6 & 07) + '0';
+ *dst++ = ((u_char)c >> 3 & 07) + '0';
+ *dst++ = ((u_char)c & 07) + '0';
+ goto done;
+ }
+ if ((flag & VIS_NOSLASH) == 0)
+ *dst++ = '\\';
+ if (c & 0200) {
+ c &= 0177;
+ *dst++ = 'M';
+ }
+ if (iscntrl(c)) {
+ *dst++ = '^';
+ if (c == 0177)
+ *dst++ = '?';
+ else
+ *dst++ = c + '@';
+ } else {
+ *dst++ = '-';
+ *dst++ = c;
+ }
+done:
+ *dst = '\0';
+ return (dst);
+}
+
+int
+strnvis(dst, src, siz, flag)
+ char *dst;
+ const char *src;
+ size_t siz;
+ int flag;
+{
+ char c;
+ char *start, *end;
+ char tbuf[5];
+ int i;
+
+ i = 0;
+ for (start = dst, end = start + siz - 1; (c = *src) && dst < end; ) {
+ if (isvisible(c)) {
+ i = 1;
+ *dst++ = c;
+ if (c == '\\' && (flag & VIS_NOSLASH) == 0) {
+ /* need space for the extra '\\' */
+ if (dst < end)
+ *dst++ = '\\';
+ else {
+ dst--;
+ i = 2;
+ break;
+ }
+ }
+ src++;
+ } else {
+ i = vis(tbuf, c, flag, *++src) - tbuf;
+ if (dst + i <= end) {
+ memcpy(dst, tbuf, i);
+ dst += i;
+ } else {
+ src--;
+ break;
+ }
+ }
+ }
+ if (siz > 0)
+ *dst = '\0';
+ if (dst + i > end) {
+ /* adjust return value for truncation */
+ while ((c = *src))
+ dst += vis(tbuf, c, flag, *++src) - tbuf;
+ }
+ return (dst - start);
+}
+
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