Submitted By: Mario Fetka (mario dot fetka at gmail dot com)
Date: 2009-03-19
Initial Package Version: 0.49
Origin: http://oss.netfarm.it/guides/ris-linux.php
Upstream Status: unknown
Description: A patch for hpa-tftp to permit case insensitive file lookups
 
diff -Naur tftp-hpa-0.49.orig/tftpd/tftpd.c tftp-hpa-0.49/tftpd/tftpd.c
--- tftp-hpa-0.49.orig/tftpd/tftpd.c	2009-03-19 17:50:47.883141096 +0000
+++ tftp-hpa-0.49/tftpd/tftpd.c	2009-03-19 18:00:20.991735706 +0000
@@ -46,6 +46,7 @@
 #include <pwd.h>
 #include <limits.h>
 #include <syslog.h>
+#include <dirent.h>
 
 #include "common/tftpsubs.h"
 #include "recvfrom.h"
@@ -972,6 +973,9 @@
 static void tftp_sendfile(struct formats *, struct tftphdr *, int);
 static void tftp_recvfile(struct formats *, struct tftphdr *, int);
 
+int lookup_entry(const char *comp, char *dest);
+void lookup_file(char *filename);
+
 struct formats {
     const char *f_mode;
     char *(*f_rewrite) (char *, int, const char **);
@@ -1332,6 +1336,63 @@
 }
 #endif
 
+int lookup_entry(const char *comp, char *dest)
+{
+  DIR *dirp;
+  struct dirent *dptr;
+  dirp = opendir(dest[0] ? dest : ".");
+  if (!dirp) return 0;
+  while ((dptr = readdir(dirp)))
+  {
+    if (!strcasecmp(dptr->d_name, comp))
+    {
+      if (dest[0]) strcat(dest, "/");
+      strcat(dest, dptr->d_name);
+      closedir(dirp);
+      return 1;
+    }
+  }
+  closedir(dirp);
+  return 0;
+}
+
+
+void lookup_file(char *filename)
+{
+  int found = 0;
+  int len = 0;
+  char dest[1024];
+  char comp[1024];
+  char *check = filename;
+  char *seek = NULL;
+
+  dest[0] = 0;
+  check++;
+  while (*check)
+  {
+    seek = strchr(check, '\\');
+    if (!seek)
+    {
+      if ((*check) && (lookup_entry(check, dest)))
+        found = 1;
+      break;
+    }
+    len = seek - check;
+    memcpy(comp, check, len);
+    comp[len]=0;
+    if (!lookup_entry(comp, dest))
+      break;
+    check += len + 1;
+  }
+
+  if (found)
+  {
+    filename[0] = 0;
+    strcat(filename, dest);
+  }
+}
+
+
 static FILE *file;
 /*
  * Validate file access.  Since we
@@ -1357,6 +1418,7 @@
     tsize_ok = 0;
     *errmsg = NULL;
 
+    if (*filename == '\\') lookup_file(filename);
     if (!secure) {
         if (*filename != '/') {
             *errmsg = "Only absolute filenames allowed";