122 lines
3.5 KiB
Plaintext
122 lines
3.5 KiB
Plaintext
FreeRDP has a few dependencies that are required for proper operation:
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1. SSL
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RDP requires a secure tunnel and utilizes TLS for this. We do not implement this
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ourselves but reuse existing libraries:
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We support
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* OpenSSL our main development SSL library
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* LibreSSL (supported by community)
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* MBedTLS (supported by community)
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2. Kerberos
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Authentication to many services requires kerberos (especially if smartcards are in use)
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We support:
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* MIT
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* Heimdal
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3. JSON
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Azure logon requires HTTP/JSON messages to be parsed.
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We support:
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* cJSON
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4. H264
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RDP GFX modes (anything newer Windows 8.1 / Server 2012) supports a graphics mode based
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on the H264 codec
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We support
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* OpenH264
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* FFMPEG (x264 or OpenH264)
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There are some platform specific implementations too (e.g. mediacodec on android) but these
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two are the options that are always required.
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5. Graphics scaling support
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High DPI support and smart-sizing option require bitmaps to be scaled by the client.
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We support
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* Swscale
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* Cairo
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6. Audio encoders/decoders
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Sound and Microphone options allow transmission of data in compressed formats.
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The most widely supported formats are uncompressed PCM (all systems support that)
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and compressed AAC (windows 8 or newer). Some other codecs are supported as well (GSM)
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but do not provide the same quality as the afore mentioned ones.
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We support
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* FAAC / FAAD2 / soxr (encoder/decoder/resampling)
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* FFMPEG
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* GSM (older low bandwidth codec)
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7. Smartcard
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To utilize smartcards for authentication/redirection
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We support
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* PCSC
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* pkcs11
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PCSC is required for smartcard redirection, pkcs11 for NLA smartcard logon support
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8. Unicode
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Most of the protocol preferably uses UCS-2/UTF16 for strings. To convert to/from UTF-8 a
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unicode support library is required:
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* Windows natively supports these (well, it is a microsoft protocol after all ;))
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* ICU on linux/unix and android
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* On Apple (iOS/Mac) we use native NSString unicode conversion routines
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9. USB redirection
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The protocol has an extension (channel) to allow low level USB redirection
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We support
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* libusb 1
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10. Platform support (mainly linux, for others the platform SDK is usually enough)
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* SDL2 for the SDL client (all platforms)
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* CUPS (linux/apple) for printing support
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* libsystemd (linux) for journald logging support
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* PAM headers/libraries (server side authentication)
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* FUSE/FUSE3 for file clipboard support (linux/mac os)
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* Wayland for wlfreerdp
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* X11 development headers for X11 client
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* ALSA development headers/libraris
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* PULSE development headers/libraries
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* OSS development headers/libraries
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11. Building recommendations
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* Use Ninja to speed up your builds
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* For release builds add -DCMAKE_BUILD_TYPE=Release (or RelWithDebInfo for less optimized but with debug symbols)
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* -DWITH_VERBOSE_WINPR_ASSERT=OFF reduces the size of the build considerably but removes lots
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of santity checks in code. Recommended for stable builds, for builds not from stable releases
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it is recommended to keep -DWITH_VERBOSE_WINPR_ASSERT=ON to have useful information on crashes.
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12. Example build instructions:
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Assume we have the source checked out to /tmp/freerdp/src and we want to install to /tmp/freerdp/install:
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(on windows this needs to be called from a visual studio command prompt or a cmd that has run vcvarsall.bat, paths obviously need to be adjusted)
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cmake -GNinja -DCMAKE_BUILD_TYPE=Release -DWITH_VERBOSE_WINPR_ASSERT=OFF -DCMAKE_PREFIX_PATH=/tmp/freerdp/install -B /tmp/freerdp/build -S /tmp/freerdp/src
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cmake --build /tmp/freerdp/build --target install
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