Why isn't my recv getting any data - c++

Question

Here's my function's I'm using to do the send() and recv()'ing.
bool Socket::send( const std::string s ) const noexcept {
int status = ::send ( m_sock, s.c_str(), s.size(), MSG_NOSIGNAL );
if(status == -1)
return false;
else
return true;
}
int Socket::recv( std::string& s ) const noexcept {
char buf [ MAXRECV + 1 ];
s = "";
memset ( buf, 0, MAXRECV + 1 );
int status = ::recv ( m_sock, buf, MAXRECV, 0 );
if ( status == -1 ) {
std::cout << "status == -1 errno == " << errno << " in Socket::recv\n";
return 0;
}
else if ( status == 0 ) {
return 0;
}
else {
s = buf;
return status;
}
}
The server accepts a client then calls send() with a test message.
std::cout << server.send(s) << std::endl;
Which is always returning false (writing 0 to cout). The client recv()'s by doing the following.
std::string s;
int i = 0;
while (s.empty()) {
i = k.read(s);
}
And it never leaves this loop. Both are set blocking by calling this function with false sent as the parameter.
void Socket::set_non_blocking ( const bool b ) noexcept {
int opts;
opts = fcntl(m_sock, F_GETFL);
if(opts < 0)
return;
if( b )
opts = ( opts | O_NONBLOCK );
else
opts = ( opts & ~O_NONBLOCK );
fcntl( m_sock, F_SETFL,opts );
}