int
smbucs2put(ulong flags, uchar *buf, ushort n, ushort maxlen, char *string)
{
uchar *p = buf + n;
int l;
int align;
align = (flags & SMB_STRING_UNALIGNED) == 0 && (n & 1) != 0;
l = string ? utflen(string) * 2 : 0;
if (n + l + ((flags & SMB_STRING_UNTERMINATED) ? 0 : 2) + align > maxlen)
return 0;
if (align)
*p++ = 0;
while (string && *string) {
Rune r;
int i;
i = chartorune(&r, string);
if (flags & SMB_STRING_CONVERT_MASK)
r = smbruneconvert(r, flags);
smbhnputs(p, r);
p += 2;
string += i;
}
if ((flags & SMB_STRING_UNTERMINATED) == 0) {
smbhnputs(p, 0);
p += 2;
}
assert(p <= buf + maxlen);
return p - (buf + n);
}
int
smbbufferoffsetputs(SmbBuffer *sess, ulong offset, ushort s)
{
if (offset + 2 > sess->wn)
return 0;
smbhnputs(sess->buf + offset, s);
return 1;
}
int
smbbufferputs(SmbBuffer *sess, ushort s)
{
if (sess->wn + sizeof(ushort) > sess->maxlen)
return 0;
smbhnputs(sess->buf + sess->wn, s);
sess->wn += sizeof(ushort);
return 1;
}
int
smbbufferfixupabsolutes(SmbBuffer *b, ulong fixupoffset)
{
if (fixupoffset < b->rn || fixupoffset > b->wn - 2)
return 0;
if (b->wn > 65535)
return 0;
smbhnputs(b->buf + fixupoffset, b->wn);
return 1;
}
int
smbbufferfixuprelatives(SmbBuffer *b, ulong fixupoffset)
{
ulong fixval;
if (fixupoffset < b->rn || fixupoffset > b->wn - 2)
return 0;
fixval = b->wn - fixupoffset - 2;
if (fixval > 65535)
return 0;
smbhnputs(b->buf + fixupoffset, fixval);
return 1;
}
int
smbbufferputheader(SmbBuffer *b, SmbHeader *h, SmbPeerInfo *p)
{
SmbRawHeader *rh;
if (offsetof(SmbRawHeader, parameterwords[0]) > smbbufferwritespace(b))
return 0;
if (smbbufferwriteoffset(b) == 0) {
rh = (SmbRawHeader *)smbbufferwritepointer(b);
rh->protocol[0] = 0xff;
memcpy(rh->protocol + 1, "SMB", 3);
rh->flags = SMB_FLAGS_SERVER_TO_REDIR | SmbHeaderFlagCaseless;
rh->command = h->command;
smbhnputs(rh->flags2, BASE_FLAGS | (smbsendunicode(p) ? SMB_FLAGS2_UNICODE : 0));
memset(rh->extra, 0, sizeof(rh->extra));
if (!smbbufferputbytes(b, nil, offsetof(SmbRawHeader, parameterwords[0])))
return 0;
rh->wordcount = h->wordcount;
}
else {
rh = (SmbRawHeader *)smbbufferreadpointer(b);
smbbufferputb(b, h->wordcount);
}
rh->status[0] = h->errclass;
rh->status[1] = 0;
smbhnputs(rh->status + 2, h->error);
smbhnputs(rh->tid, h->tid);
smbhnputs(rh->pid, h->pid);
smbhnputs(rh->uid, h->uid);
smbhnputs(rh->mid, h->mid);
return 1;
}