Hi, Header IPv4 in Portuguese

[ronyjah]

\begin{figure}[h!]
\begin{center}
\caption{Cabeçalho do quadro IPv4}
\begin{tikzpicture}[scale=0.47]
\foreach \x in {0,...,31}
\node at (\x+0.5,20.5) {\scriptsize \x};
\foreach \x in {0,...,31}
\node at (\x+0.5,13.5) {\scriptsize \x};
\foreach \x in {0,...,32}
\draw[thick, blue] (\x,13) -- (\x,21);
\node[thick] (bit1) at (-0.5,20.5) {\scriptsize bit};
\node[thick] (bit2) at (-0.5,13.5) {\scriptsize bit};
\draw [<->, thick] (-0.5, 19.9) -- (-0.5,15.1);
\draw [thick] (-1, 20) -- (-0.1,20);
\draw [thick] (-1, 15) -- (-0.1,15);
\node[fill=white] at (-1.1,17.5) {\tiny 20 bytes};
\filldraw[thick,draw=black, fill=white] (0,20) rectangle (4,19); \node (mode) at (2,19.5) {\scriptsize versão};
\filldraw[thick,draw=black, fill=white] (4,20) rectangle (8,19); \node (mode) at (6,19.68) {\tiny comp. Cabeçalho};\node (mode) at (6,19.25) {\tiny com opções};
\draw[thick, draw=black, fill=white] (8,20) rectangle (16,19); \node (stratum) at (11.5,19.5) {\scriptsize Tipo de serviço (TOS)};
\draw[thick, draw=black, fill=white] (16,20) rectangle (32,19); \node (li) at (24,19.5) {\scriptsize Comprimento do pacote completo};
\filldraw[thick,draw=black, fill=white] (0,19) rectangle (16,18); \node (mode) at (8,18.5) {\scriptsize Identificação};
\draw[thick, draw=black] (16,19) rectangle (19,18); \filldraw[white] (16.5,18.43) rectangle (19,18.88); \node at (17.5,18.67) {\tiny IP flags}; \node at (16.5,18.25) {\tiny x};\node at (17.5,18.25) {\tiny D};\node at (18.5,18.25) {\tiny M};
\draw[thick, draw=black, fill=white] (19,19) rectangle (32,18); \node (li) at (24,18.5) {\scriptsize Offset do fragmento};
\filldraw[thick,draw=black, fill=white] (0,18) rectangle (8,17); \node (mode) at (4,17.5) {\scriptsize Tempo de vida (TTL)};
\draw[thick, draw=black, fill=white] (8,18) rectangle (16,17); \node (stratum) at (11.5,17.5) {\scriptsize Protocolo};
\draw[thick, draw=black, fill=white] (16,18) rectangle (32,17); \node (li) at (24,17.5) {\scriptsize cabeçalho do checksum};
\filldraw[thick,draw=black, fill=white] (0,17) rectangle (32,16); \node (mode) at (16,16.5) {\scriptsize Endereço IP de origem};
\filldraw[thick,draw=black, fill=white] (0,16) rectangle (32,15); \node (mode) at (16,15.5) {\scriptsize Endereço IP de destino};
\draw[thick,draw=black, fill=white] (0,15) rectangle (31.5,14);
\draw[fill=white, draw=white] (31.4,14.96) rectangle (31.6,14.05);
\draw[thick] (31.5,14.97) decorate [decoration=saw] { -- (31.5,14.02)};
\node (mode) at (16,14.5) {\scriptsize Opções IP (Tamanho variável)};
\end{tikzpicture}
\captionof*{figure}{Fonte: \citeonline{tikzrepo}}
\end{center}
\end{figure}