[Tex/LaTex] Linking the section titles to toc using only hyperref

hyperreftable of contents

How to link section titles back to toc? I want to use only hyperref and not any toc related packages (answer with titlesec can be found here)

I can do the hypertarget to toc sections (answer provided by cmhughes and shown in the MWE below). Thus, my question really is: where to put the hyperlink line?

\documentclass{report}
\usepackage{hyperref}

\let\oldcontentsline\contentsline%
\renewcommand\contentsline[4]{%
\hypertarget{toc#4}{}%
\oldcontentsline{#1}{#2}{#3}{#4}}

\begin{document}
\tableofcontents
\chapter{A Chapter to act as a Link}
\section{A Section to act as a Link}
\end{document}

Best Answer

Not sure if this is what you want

\documentclass{report}
\usepackage[colorlinks]{hyperref}

\let\oldcontentsline\contentsline%
\renewcommand\contentsline[4]{%
    \oldcontentsline{#1}{\smash{\raisebox{1em}{\hypertarget{toc#4}{}}}#2}{#3}{#4}}
\newcommand\mychapter[1]{%
    \chapter[#1]{\protect\hyperlink{tocchapter.\thechapter}{#1}}}
\newcommand\mysection[1]{%
    \section[#1]{\protect\hyperlink{tocsection.\thesection}{#1}}}
\newcommand\mysubsection[1]{%
    \subsection[#1]{\protect\hyperlink{tocsubsection.\thesubsection}{#1}}}

\begin{document}
    \tableofcontents
    \mychapter{A Chapter to act as a Link}
        \mysection{A Section to act as a Link}
            \mysubsection{A Subection to act as a Link}
            \mysubsection{A Subection to act as a Link}
        \mysection{A Section to act as a Link}
            \mysubsection{A Subection to act as a Link}
            \mysubsection{A Subection to act as a Link}
    \mychapter{A Chapter to act as a Link}
        \mysection{A Section to act as a Link}
            \mysubsection{A Subection to act as a Link}
            \mysubsection{A Subection to act as a Link}
        \mysection{A Section to act as a Link}
            \mysubsection{A Subection to act as a Link}
            \mysubsection{A Subection to act as a Link}
    \clearpage~
\end{document}
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