This is an implementation of a simple messenger on a local network

• We can send messages to everyone using the UDP broadcast protocol.
• We can send private messages using the TCP protocol, as well as encryption using the OpenSSL library and certificates.
• We can send and receive files using encrypted messages of any size.
• If the connection is disconnected, we can resume downloading the file from the same location.
• The functionality of detecting new users has been implemented.
• The clients in the network have the same rights and priorities.
• All messages are saved.
• It is possible to send messages to a group of users
• Connecting/disconnecting to a general chat

/help - for help message.
/pm <name> <text> - for private message.
/members - print list of current members.
/trust <user> - Trust the user. He will be able to send you files.
/untrust <user> - Stop trust user. He won't be able to send you files.
/trusted - List of your trusted users.
/sendfile <user> <path-to-file> - Send a file to user. Need to be a trusted user.
/general - Enable/Disable general chat.
/history <username> - Prints the history with user.
/sendg <Number-of-users> <Users> <Text> - Sends a message to group of users.

make # Default
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make OUT_O_DIR=debug CC=clang CFLAGS="-g -O0" # Debug
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make test # Run tests
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# Coverage of tests using lcov.
make coverage
lcov --capture --directory build --output-file coverage.info
lcov --remove coverage.info 'thirdparty/*' --output-file coverage.info
genhtml coverage.info --output-directory coverage-report
firefox coverage-report/index.html