void printUsage()

in fizz/tool/FizzServerCommand.cpp [44:101]

• 56 lines of code
• 1 McCabe index (conditional complexity)

void printUsage() {
  // clang-format off
  std::cerr
    << "Usage: server args\n"
    << "\n"
    << "Supported arguments:\n"
    << " -accept port             (set port to accept connections on. Default: 8443)\n"
    << " -ciphers c1,c2:c3;...    (Lists of ciphers in preference order, separated by colons. Default:\n"
    << "                           TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256)\n"
    << " -sigschemes s1:...       (colon-separated list of signature schemes in preference order.\n"
    << " -curves c1:...           (colon-separated list of supported ECDSA curves. Default: secp256r1, x25519)\n"
    << " -cert cert               (PEM format server certificate. Default: none, generates a self-signed cert)\n"
    << " -key key                 (PEM format private key for server certificate. Default: none)\n"
    << "                          (note: you can specify cert and key multiple times to support multiple certs.\n"
    << "                           The first (non-delegated) cert passed in will be used as the default cert.)\n"
    << " -pass password           (private key password. Default: none)\n"
    << " -requestcert             (request an optional client certificate from clients. Default: false)\n"
    << " -requirecert             (require a client certificate from clients. Default: false)\n"
    << " -capath directory        (path to a directory of hashed formed CA certs used for verification.\n"
    << "                           The directory should contain one certificate or CRL per file in PEM format,\n"
    << "                           with a file name of the form hash.N for a certificate, or hash.rN for a CRL.\n"
    << "                           Refer to https://www.openssl.org/docs/man1.1.1/man1/rehash.html for how to generate such files.)\n"
    << " -cafile file             (path to a bundle file of CA certs used for verification; can be used with or without -capath.)\n"
    << " -keylog file             (dump TLS secrets to a NSS key log file; for debugging purpose only)\n"
    << " -early                   (enables sending early data during resumption. Default: false)\n"
    << " -early_max maxBytes      (sets the maximum amount allowed in early data. Default: UINT32_MAX)\n"
    << " -alpn alpn1:...          (comma-separated list of ALPNs to support. Default: none)\n"
    << " -certcompression a1:...  (enables certificate compression support for given algorithms. Default: None)\n"
    << " -fallback                (enables falling back to OpenSSL for pre-1.3 connections. Default: false)\n"
    << " -loop                    (don't exit after client disconnect. Default: false)\n"
    << " -quiet                   (hide informational logging. Default: false)\n"
    << " -v verbosity             (set verbose log level for VLOG macros. Default: 0)\n"
    << " -vmodule m1=N,...        (set per-module verbose log level for VLOG macros. Default: none)\n"
    << " -http                    (run a crude HTTP server that returns stats for GET requests. Default: false)\n"
    << " -delegatedcred cred      (use a delegated credential. If set, -cert and -key must also be set. Default: none)\n"
    << " -ech                     (use default values to simulate the sending of an encrypted client hello.)\n"
    << " -echconfigs file         (path to read ECH configs to use when decrypting an encrypted client hello.)\n"
    << "                          (If more than 1 ECH config is provided, the first config will be used.)\n"
    << "                          (The ech configs should be in JSON format: {echconfigs: [${your ECH config here with all the fields..}]})\n"
    << "                          (See FizzCommandCommonTest for an example.)\n"
    << "                          (Note ECH is implicitly enabled if this and a private key are provided.)\n"
    << " -echprivatekey key       (path to read the private key used in the ECH decryption.)\n"
    << "                          (This MUST correspond to the public key set in the ECH config.)\n"
    << "                          (If this option is specified, a corresponding ECH config must be set.)\n"
    << "                          (For OpenSSL key exchanges, please use the PEM format for the private key.)\n"
    << "                          (For the X25519 key exchange, please specify the private key in hex on the first line, "
    << "                          (and the public key in hex on the second line.)\n"
#ifdef FIZZ_TOOL_ENABLE_IO_URING
    << " -io_uring                (use io_uring for I/O. Default: false)\n"
    << " -io_uring_capacity N     (backend capacity for io_uring. Default: 128)\n"
    << " -io_uring_max_submit N   (maximum submit size for io_uring. Default: 64)\n"
    << " -io_uring_max_get N      (maximum get size for io_uring. Default: no limit)\n"
    << " -io_uring_register_fds   (use registered fds with io_uring. Default: false)\n"
    << " -io_uring_async_recv     (use async recv for io_uring. Default: false)\n"
#endif
  ;
  // clang-format on
}