Fix setinfo.

Repro:

]setinfo
]setinfo tea "earl grey, hot"
]setinfo

This kills the "team=none" info variable.

Also, fix some memory accesses beyond end of string; probably can be
reproduced somehow to cause mayhem.

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@12470 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/common.c b/common.c
index c01e931d798e2a87dbd502e27fec90bfb458fedc..badf4c9ccaca487160a3af26f8d2f3d14fd870df 100644 (file)
--- a/common.c
+++ b/common.c
@@ -2035,16 +2035,20 @@ char *InfoString_GetValue(const char *buffer, const char *key, char *value, size
        }
        while (buffer[pos] == '\\')
        {
-               if (!memcmp(buffer + pos+1, key, keylength))
+               if (!memcmp(buffer + pos+1, key, keylength) &&
+                               (buffer[pos+1 + keylength] == 0 ||
+                                buffer[pos+1 + keylength] == '\\'))
                {
-                       for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
-                       pos++;
+                       pos += 1 + keylength;           // Skip \key
+                       if (buffer[pos] == '\\') pos++; // Skip \ before value.
                        for (j = 0;buffer[pos+j] && buffer[pos+j] != '\\' && j < (int)valuelength - 1;j++)
                                value[j] = buffer[pos+j];
                        value[j] = 0;
                        return value;
                }
+               if (buffer[pos] == '\\') pos++; // Skip \ before value.
                for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
+               if (buffer[pos] == '\\') pos++; // Skip \ before value.
                for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
        }
        // if we reach this point the key was not found
@@ -2077,17 +2081,22 @@ void InfoString_SetValue(char *buffer, size_t bufferlength, const char *key, con
        }
        while (buffer[pos] == '\\')
        {
-               if (!memcmp(buffer + pos+1, key, keylength))
+               if (!memcmp(buffer + pos+1, key, keylength) &&
+                               (buffer[pos+1 + keylength] == 0 ||
+                                buffer[pos+1 + keylength] == '\\'))
                        break;
-               for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
-               for (pos++;buffer[pos] && buffer[pos] != '\\';pos++);
+               if (buffer[pos] == '\\') pos++; // Skip \ before value.
+               for (;buffer[pos] && buffer[pos] != '\\';pos++);
+               if (buffer[pos] == '\\') pos++; // Skip \ before value.
+               for (;buffer[pos] && buffer[pos] != '\\';pos++);
        }
        // if we found the key, find the end of it because we will be replacing it
        pos2 = pos;
        if (buffer[pos] == '\\')
        {
-               for (pos2++;buffer[pos2] && buffer[pos2] != '\\';pos2++);
-               for (pos2++;buffer[pos2] && buffer[pos2] != '\\';pos2++);
+               pos2 += 1 + keylength;  // Skip \key
+               if (buffer[pos2] == '\\') pos2++; // Skip \ before value.
+               for (;buffer[pos2] && buffer[pos2] != '\\';pos2++);
        }
        if (bufferlength <= pos + 1 + strlen(key) + 1 + strlen(value) + strlen(buffer + pos2))
        {