| //===-- RNBSocket.cpp -------------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Created by Greg Clayton on 12/12/07. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "RNBSocket.h" |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <netinet/in.h> |
| #include <netinet/tcp.h> |
| #include <termios.h> |
| #include "DNBLog.h" |
| #include "DNBError.h" |
| |
| #if defined (__arm__) |
| #include "lockdown.h" |
| #endif |
| |
| /* Once we have a RNBSocket object with a port # specified, |
| this function is called to wait for an incoming connection. |
| This function blocks while waiting for that connection. */ |
| |
| rnb_err_t |
| RNBSocket::Listen (in_port_t listen_port_num) |
| { |
| //DNBLogThreadedIf(LOG_RNB_COMM, "%8u RNBSocket::%s called", (uint32_t)m_timer.ElapsedMicroSeconds(true), __FUNCTION__); |
| // Disconnect without saving errno |
| Disconnect (false); |
| |
| DNBError err; |
| int listen_port = ::socket (AF_INET, SOCK_STREAM, IPPROTO_TCP); |
| if (listen_port == -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_port); |
| |
| if (err.Fail()) |
| return rnb_err; |
| |
| // enable local address reuse |
| SetSocketOption (listen_port, 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 (listen_port_num); |
| sa.sin_addr.s_addr = htonl (INADDR_ANY); |
| |
| int error = ::bind (listen_port, (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_port); |
| |
| if (err.Fail()) |
| { |
| ClosePort (listen_port, false); |
| return rnb_err; |
| } |
| |
| error = ::listen (listen_port, 1); |
| if (error == -1) |
| err.SetError(errno, DNBError::POSIX); |
| |
| if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM)) |
| err.LogThreaded("::listen ( socket = %i, backlog = 1 )", listen_port); |
| |
| if (err.Fail()) |
| { |
| ClosePort (listen_port, false); |
| return rnb_err; |
| } |
| |
| m_conn_port = ::accept (listen_port, NULL, 0); |
| if (m_conn_port == -1) |
| err.SetError(errno, DNBError::POSIX); |
| |
| if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM)) |
| err.LogThreaded("::accept ( socket = %i, address = NULL, address_len = 0 )", listen_port); |
| |
| if (err.Fail()) |
| { |
| ClosePort (listen_port, false); |
| return rnb_err; |
| } |
| else |
| { |
| // We are done with the listen port |
| ClosePort (listen_port, false); |
| |
| // Keep our TCP packets coming without any delays. |
| SetSocketOption (m_conn_port, IPPROTO_TCP, TCP_NODELAY, 1); |
| } |
| |
| return rnb_success; |
| } |
| |
| #if defined (__arm__) |
| rnb_err_t |
| RNBSocket::ConnectToService() |
| { |
| DNBLog("Connecting to com.apple.%s service...", DEBUGSERVER_PROGRAM_NAME); |
| // Disconnect from any previous connections |
| Disconnect(false); |
| |
| m_conn_port = ::lockdown_checkin (NULL, NULL); |
| if (m_conn_port == -1) |
| { |
| DNBLogThreadedIf(LOG_RNB_COMM, "::lockdown_checkin(NULL, NULL) failed"); |
| return rnb_not_connected; |
| } |
| m_conn_port_from_lockdown = true; |
| return rnb_success; |
| } |
| #endif |
| |
| rnb_err_t |
| RNBSocket::OpenFile (const char *path) |
| { |
| DNBError err; |
| m_conn_port = open (path, O_RDWR); |
| if (m_conn_port == -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_conn_port, &stdin_termios) == 0) |
| { |
| stdin_termios.c_lflag &= ~ECHO; // Turn off echoing |
| stdin_termios.c_lflag &= ~ICANON; // Get one char at a time |
| ::tcsetattr (m_conn_port, 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) |
| { |
| if (m_conn_port_from_lockdown) |
| m_conn_port_from_lockdown = false; |
| return ClosePort (m_conn_port, save_errno); |
| } |
| |
| |
| rnb_err_t |
| RNBSocket::Read (std::string &p) |
| { |
| char buf[1024]; |
| p.clear(); |
| |
| // Note that BUF is on the stack so we must be careful to keep any |
| // writes to BUF from overflowing or we'll have security issues. |
| |
| if (m_conn_port == -1) |
| return rnb_err; |
| |
| //DNBLogThreadedIf(LOG_RNB_COMM, "%8u RNBSocket::%s calling read()", (uint32_t)m_timer.ElapsedMicroSeconds(true), __FUNCTION__); |
| DNBError err; |
| int bytesread = read (m_conn_port, 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, %zu ) => %i", m_conn_port, buf, sizeof (buf), bytesread); |
| |
| // Our port went away - we have to mark this so IsConnected will return the truth. |
| if (bytesread == 0) |
| { |
| m_conn_port = -1; |
| return rnb_not_connected; |
| } |
| else if (bytesread == -1) |
| { |
| m_conn_port = -1; |
| return rnb_err; |
| } |
| // Strip spaces from the end of the buffer |
| while (!p.empty() && isspace (p[p.size() - 1])) |
| p.erase (p.size () - 1); |
| |
| // Most data in the debugserver packets valid printable characters... |
| 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_conn_port == -1) |
| return rnb_err; |
| |
| DNBError err; |
| int bytessent = send (m_conn_port, buffer, length, 0); |
| if (bytessent < 0) |
| err.SetError(errno, DNBError::POSIX); |
| |
| if (err.Fail() || DNBLogCheckLogBit(LOG_RNB_COMM)) |
| err.LogThreaded("::send ( socket = %i, buffer = %p, length = %zu, flags = 0 ) => %i", m_conn_port, buffer, length, bytessent); |
| |
| if (bytessent < 0) |
| return rnb_err; |
| |
| if (bytessent != length) |
| return rnb_err; |
| |
| DNBLogThreadedIf(LOG_RNB_PACKETS, "putpkt: %*s", length, (char *)buffer); // All data is string based in debugserver, so this is safe |
| DNBLogThreadedIf(LOG_RNB_COMM, "sent: %*s", 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; |
| } |
| |
| |