#include "RNBSocket.h"
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <termios.h>
#include "DNBLog.h"
#include "DNBError.h"
#ifdef WITH_LOCKDOWN
#include "lockdown.h"
#endif
rnb_err_t
RNBSocket::Listen (in_port_t port, PortBoundCallback callback, const void *callback_baton)
{
Disconnect (false);
DNBError err;
int listen_fd = ::socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (listen_fd == -1)
err.SetError(errno, DNBError::POSIX);
if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
err.LogThreaded("::socket ( domain = AF_INET, type = SOCK_STREAM, protocol = IPPROTO_TCP ) => socket = %i", listen_fd);
if (err.Fail())
return rnb_err;
SetSocketOption (listen_fd, SOL_SOCKET, SO_REUSEADDR, 1);
struct sockaddr_in sa;
::memset (&sa, 0, sizeof sa);
sa.sin_len = sizeof sa;
sa.sin_family = AF_INET;
sa.sin_port = htons (port);
sa.sin_addr.s_addr = htonl (INADDR_ANY);
int error = ::bind (listen_fd, (struct sockaddr *) &sa, sizeof(sa));
if (error == -1)
err.SetError(errno, DNBError::POSIX);
if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
err.LogThreaded("::bind ( socket = %i, (struct sockaddr *) &sa, sizeof(sa)) )", listen_fd);
if (err.Fail())
{
ClosePort (listen_fd, false);
return rnb_err;
}
if (callback && port == 0)
{
socklen_t sa_len = sizeof (sa);
if (getsockname(listen_fd, (struct sockaddr *)&sa, &sa_len) == 0)
{
port = ntohs (sa.sin_port);
callback (callback_baton, port);
}
}
error = ::listen (listen_fd, 1);
if (error == -1)
err.SetError(errno, DNBError::POSIX);
if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
err.LogThreaded("::listen ( socket = %i, backlog = 1 )", listen_fd);
if (err.Fail())
{
ClosePort (listen_fd, false);
return rnb_err;
}
m_fd = ::accept (listen_fd, NULL, 0);
if (m_fd == -1)
err.SetError(errno, DNBError::POSIX);
if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
err.LogThreaded("::accept ( socket = %i, address = NULL, address_len = 0 )", listen_fd);
ClosePort (listen_fd, false);
if (err.Fail())
{
return rnb_err;
}
else
{
SetSocketOption (m_fd, IPPROTO_TCP, TCP_NODELAY, 1);
}
return rnb_success;
}
rnb_err_t
RNBSocket::Connect (const char *host, uint16_t port)
{
Disconnect (false);
m_fd = ::socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (m_fd == -1)
return rnb_err;
SetSocketOption (m_fd, SOL_SOCKET, SO_REUSEADDR, 1);
struct sockaddr_in sa;
::memset (&sa, 0, sizeof (sa));
sa.sin_family = AF_INET;
sa.sin_port = htons (port);
if (host == NULL)
host = "localhost";
int inet_pton_result = ::inet_pton (AF_INET, host, &sa.sin_addr);
if (inet_pton_result <= 0)
{
struct hostent *host_entry = gethostbyname (host);
if (host_entry)
{
std::string host_str (::inet_ntoa (*(struct in_addr *)*host_entry->h_addr_list));
inet_pton_result = ::inet_pton (AF_INET, host_str.c_str(), &sa.sin_addr);
if (inet_pton_result <= 0)
{
Disconnect (false);
return rnb_err;
}
}
}
if (-1 == ::connect (m_fd, (const struct sockaddr *)&sa, sizeof(sa)))
{
Disconnect (false);
return rnb_err;
}
SetSocketOption (m_fd, IPPROTO_TCP, TCP_NODELAY, 1);
return rnb_success;
}
rnb_err_t
RNBSocket::useFD(int fd)
{
if (fd < 0) {
DNBLogThreadedIf(LOG_RNB_COMM, "Bad file descriptor passed in.");
return rnb_err;
}
m_fd = fd;
return rnb_success;
}
#ifdef WITH_LOCKDOWN
rnb_err_t
RNBSocket::ConnectToService()
{
DNBLog("Connecting to com.apple.%s service...", DEBUGSERVER_PROGRAM_NAME);
Disconnect(false);
SSLContextRef ssl_ctx;
bzero(&ssl_ctx, sizeof(ssl_ctx));
if (::lockdown_secure_checkin (&m_fd, &ssl_ctx, NULL, NULL) != kLDESuccess)
{
DNBLogThreadedIf(LOG_RNB_COMM, "::lockdown_secure_checkin(&m_fd, NULL, NULL, NULL) failed");
m_fd = -1;
return rnb_not_connected;
}
m_fd_from_lockdown = true;
return rnb_success;
}
#endif
rnb_err_t
RNBSocket::OpenFile (const char *path)
{
DNBError err;
m_fd = open (path, O_RDWR);
if (m_fd == -1)
{
err.SetError(errno, DNBError::POSIX);
err.LogThreaded ("can't open file '%s'", path);
return rnb_not_connected;
}
else
{
struct termios stdin_termios;
if (::tcgetattr (m_fd, &stdin_termios) == 0)
{
stdin_termios.c_lflag &= ~ECHO; stdin_termios.c_lflag &= ~ICANON; ::tcsetattr (m_fd, TCSANOW, &stdin_termios);
}
}
return rnb_success;
}
int
RNBSocket::SetSocketOption(int fd, int level, int option_name, int option_value)
{
return ::setsockopt(fd, level, option_name, &option_value, sizeof(option_value));
}
rnb_err_t
RNBSocket::Disconnect (bool save_errno)
{
#ifdef WITH_LOCKDOWN
if (m_fd_from_lockdown)
m_fd_from_lockdown = false;
#endif
return ClosePort (m_fd, save_errno);
}
rnb_err_t
RNBSocket::Read (std::string &p)
{
char buf[1024];
p.clear();
if (m_fd == -1)
return rnb_err;
DNBError err;
int bytesread = read (m_fd, buf, sizeof (buf));
if (bytesread <= 0)
err.SetError(errno, DNBError::POSIX);
else
p.append(buf, bytesread);
if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
err.LogThreaded("::read ( %i, %p, %llu ) => %i", m_fd, buf, sizeof (buf), (uint64_t)bytesread);
if (bytesread == 0)
{
m_fd = -1;
return rnb_not_connected;
}
else if (bytesread == -1)
{
m_fd = -1;
return rnb_err;
}
while (!p.empty() && isspace (p[p.size() - 1]))
p.erase (p.size () - 1);
DNBLogThreadedIf(LOG_RNB_COMM, "read: %s", p.c_str());
return rnb_success;
}
rnb_err_t
RNBSocket::Write (const void *buffer, size_t length)
{
if (m_fd == -1)
return rnb_err;
DNBError err;
int bytessent = write (m_fd, buffer, length);
if (bytessent < 0)
err.SetError(errno, DNBError::POSIX);
if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM))
err.LogThreaded("::write ( socket = %i, buffer = %p, length = %llu) => %i", m_fd, buffer, length, (uint64_t)bytessent);
if (bytessent < 0)
return rnb_err;
if (bytessent != length)
return rnb_err;
DNBLogThreadedIf(LOG_RNB_PACKETS, "putpkt: %*s", (int)length, (char *)buffer); DNBLogThreadedIf(LOG_RNB_COMM, "sent: %*s", (int)length, (char *)buffer);
return rnb_success;
}
rnb_err_t
RNBSocket::ClosePort (int& fd, bool save_errno)
{
int close_err = 0;
if (fd > 0)
{
errno = 0;
close_err = close (fd);
fd = -1;
}
return close_err != 0 ? rnb_err : rnb_success;
}