Files needed for building applications with libcurl
The libcurl-devel package includes header files and libraries necessary for
developing programs which use the libcurl library. It contains the API
documentation of the library, too.
| Command | Description |
|---|---|
| curl-config | Get information about a libcurl installation |
| Library Function | Description |
|---|---|
| curl_easy_cleanup | End a libcurl easy handle |
| curl_easy_duphandle | Clone a libcurl session handle |
| curl_easy_escape | URL encodes the given string |
| curl_easy_getinfo | extract information from a curl handle |
| curl_easy_init | Start a libcurl easy session |
| curl_easy_pause | pause and unpause a connection |
| curl_easy_perform | perform a blocking file transfer |
| curl_easy_recv | receives raw data on an "easy" connection |
| curl_easy_reset | reset all options of a libcurl session handle |
| curl_easy_send | sends raw data over an "easy" connection |
| curl_easy_setopt | set options for a curl easy handle |
| curl_easy_strerror | return string describing error code |
| curl_easy_unescape | URL decodes the given string |
| curl_easy_upkeep | Perform any connection upkeep checks. |
| curl_escape | URL encodes the given string |
| curl_formadd | add a section to a multipart/formdata HTTP POST |
| curl_formfree | free a previously build multipart/formdata HTTP POST chain |
| curl_formget | serialize a previously built multipart/formdata HTTP POST chain |
| curl_free | reclaim memory that has been obtained through a libcurl call |
| curl_getdate | Convert a date string to number of seconds |
| curl_getenv | return value for environment name |
| curl_global_cleanup | global libcurl cleanup |
| curl_global_init | Global libcurl initialisation |
| curl_global_init_mem | Global libcurl initialisation with memory callbacks |
| curl_global_sslset | Select SSL backend to use with libcurl |
| CURLINFO_ACTIVESOCKET | get the active socket |
| CURLINFO_APPCONNECT_TIME | get the time until the SSL/SSH handshake is completed |
| CURLINFO_APPCONNECT_TIME_T | get the time until the SSL/SSH handshake is completed |
| CURLINFO_CERTINFO | get the TLS certificate chain |
| CURLINFO_CONDITION_UNMET | get info on unmet time conditional |
| CURLINFO_CONNECT_TIME | get the time until connect |
| CURLINFO_CONNECT_TIME_T | get the time until connect |
| CURLINFO_CONTENT_LENGTH_DOWNLOAD | get content-length of download |
| CURLINFO_CONTENT_LENGTH_DOWNLOAD_T | get content-length of download |
| CURLINFO_CONTENT_LENGTH_UPLOAD | get the specified size of the upload |
| CURLINFO_CONTENT_LENGTH_UPLOAD_T | get the specified size of the upload |
| CURLINFO_CONTENT_TYPE | get Content-Type |
| CURLINFO_COOKIELIST | get all known cookies |
| CURLINFO_EFFECTIVE_URL | get the last used URL |
| CURLINFO_FILETIME | get the remote time of the retrieved document |
| CURLINFO_FILETIME_T | get the remote time of the retrieved document |
| CURLINFO_FTP_ENTRY_PATH | get entry path in FTP server |
| CURLINFO_HEADER_SIZE | get size of retrieved headers |
| CURLINFO_HTTPAUTH_AVAIL | get available HTTP authentication methods |
| CURLINFO_HTTP_CONNECTCODE | get the CONNECT response code |
| CURLINFO_HTTP_VERSION | get the http version used in the connection |
| CURLINFO_LASTSOCKET | get the last socket used |
| CURLINFO_LOCAL_IP | get local IP address of last connection |
| CURLINFO_LOCAL_PORT | get the latest local port number |
| CURLINFO_NAMELOOKUP_TIME | get the name lookup time |
| CURLINFO_NAMELOOKUP_TIME_T | get the name lookup time in microseconds |
| CURLINFO_NUM_CONNECTS | get number of created connections |
| CURLINFO_OS_ERRNO | get errno number from last connect failure |
| CURLINFO_PRETRANSFER_TIME | get the time until the file transfer start |
| CURLINFO_PRETRANSFER_TIME_T | get the time until the file transfer start |
| CURLINFO_PRIMARY_IP | get IP address of last connection |
| CURLINFO_PRIMARY_PORT | get the latest destination port number |
| CURLINFO_PRIVATE | get the private pointer |
| CURLINFO_PROTOCOL | get the protocol used in the connection |
| CURLINFO_PROXYAUTH_AVAIL | get available HTTP proxy authentication methods |
| CURLINFO_PROXY_SSL_VERIFYRESULT | get the result of the proxy certificate verification |
| CURLINFO_REDIRECT_COUNT | get the number of redirects |
| CURLINFO_REDIRECT_TIME | get the time for all redirection steps |
| CURLINFO_REDIRECT_TIME_T | get the time for all redirection steps |
| CURLINFO_REDIRECT_URL | get the URL a redirect would go to |
| CURLINFO_REQUEST_SIZE | get size of sent request |
| CURLINFO_RESPONSE_CODE | get the last response code |
| CURLINFO_RTSP_CLIENT_CSEQ | get the next RTSP client CSeq |
| CURLINFO_RTSP_CSEQ_RECV | get the recently received CSeq |
| CURLINFO_RTSP_SERVER_CSEQ | get the next RTSP server CSeq |
| CURLINFO_RTSP_SESSION_ID | get RTSP session ID |
| CURLINFO_SCHEME | get the URL scheme (sometimes called protocol) used in the connection |
| CURLINFO_SIZE_DOWNLOAD | get the number of downloaded bytes |
| CURLINFO_SIZE_DOWNLOAD_T | get the number of downloaded bytes |
| CURLINFO_SIZE_UPLOAD | get the number of uploaded bytes |
| CURLINFO_SIZE_UPLOAD_T | get the number of uploaded bytes |
| CURLINFO_SPEED_DOWNLOAD | get download speed |
| CURLINFO_SPEED_DOWNLOAD_T | get download speed |
| CURLINFO_SPEED_UPLOAD | get upload speed |
| CURLINFO_SPEED_UPLOAD_T | get upload speed |
| CURLINFO_SSL_ENGINES | get an slist of OpenSSL crypto-engines |
| CURLINFO_SSL_VERIFYRESULT | get the result of the certificate verification |
| CURLINFO_STARTTRANSFER_TIME | get the time until the first byte is received |
| CURLINFO_STARTTRANSFER_TIME_T | get the time until the first byte is received |
| CURLINFO_TLS_SESSION | get TLS session info |
| CURLINFO_TLS_SSL_PTR | get TLS session info |
| CURLINFO_TOTAL_TIME | get total time of previous transfer |
| CURLINFO_TOTAL_TIME_T | get total time of previous transfer in microseconds |
| curl_mime_addpart | append a new empty part to a mime structure |
| curl_mime_data | set a mime part's body data from memory |
| curl_mime_data_cb | set a callback-based data source for a mime part's body |
| curl_mime_encoder | set a mime part's encoder and content transfer encoding |
| curl_mime_filedata | set a mime part's body data from a file contents |
| curl_mime_filename | set a mime part's remote file name |
| curl_mime_free | free a previously built mime structure |
| curl_mime_headers | set a mime part's custom headers |
| curl_mime_init | create a mime handle |
| curl_mime_name | set a mime part's name |
| curl_mime_subparts | set subparts of a multipart mime part |
| curl_mime_type | set a mime part's content type |
| CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE | chunk length threshold for pipelining |
| CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE | size threshold for pipelining penalty |
| CURLMOPT_MAXCONNECTS | set size of connection cache |
| CURLMOPT_MAX_HOST_CONNECTIONS | set max number of connections to a single host |
| CURLMOPT_MAX_PIPELINE_LENGTH | maximum number of requests in a pipeline |
| CURLMOPT_MAX_TOTAL_CONNECTIONS | max simultaneously open connections |
| CURLMOPT_PIPELINING | enable HTTP pipelining and multiplexing |
| CURLMOPT_PIPELINING_SERVER_BL | pipelining server blacklist |
| CURLMOPT_PIPELINING_SITE_BL | pipelining host blacklist |
| CURLMOPT_PUSHDATA | pointer to pass to push callback |
| CURLMOPT_PUSHFUNCTION | callback that approves or denies server pushes |
| CURLMOPT_SOCKETDATA | custom pointer passed to the socket callback |
| CURLMOPT_SOCKETFUNCTION | callback informed about what to wait for |
| CURLMOPT_TIMERDATA | custom pointer to pass to timer callback |
| CURLMOPT_TIMERFUNCTION | set callback to receive timeout values |
| curl_mprintf | formatted output conversion |
| curl_multi_add_handle | add an easy handle to a multi session |
| curl_multi_assign | set data to associate with an internal socket |
| curl_multi_cleanup | close down a multi session |
| curl_multi_fdset | extracts file descriptor information from a multi handle |
| curl_multi_info_read | read multi stack informationals |
| curl_multi_init | create a multi handle |
| curl_multi_perform | reads/writes available data from each easy handle |
| curl_multi_remove_handle | remove an easy handle from a multi session |
| curl_multi_setopt | set options for a curl multi handle |
| curl_multi_socket | reads/writes available data |
| curl_multi_socket_action | reads/writes available data given an action |
| curl_multi_strerror | return string describing error code |
| curl_multi_timeout | how long to wait for action before proceeding |
| curl_multi_wait | polls on all easy handles in a multi handle |
| CURLOPT_ABSTRACT_UNIX_SOCKET | set an abstract Unix domain socket |
| CURLOPT_ACCEPT_ENCODING | enables automatic decompression of HTTP downloads |
| CURLOPT_ACCEPTTIMEOUT_MS | timeout waiting for FTP server to connect back |
| CURLOPT_ADDRESS_SCOPE | set scope for local IPv6 addresses |
| CURLOPT_APPEND | enable appending to the remote file |
| CURLOPT_AUTOREFERER | automatically update the referer header |
| CURLOPT_BUFFERSIZE | set preferred receive buffer size |
| CURLOPT_CAINFO | path to Certificate Authority (CA) bundle |
| CURLOPT_CAPATH | specify directory holding CA certificates |
| CURLOPT_CERTINFO | request SSL certificate information |
| CURLOPT_CHUNK_BGN_FUNCTION | callback before a transfer with FTP wildcardmatch |
| CURLOPT_CHUNK_DATA | custom pointer to the FTP chunk callbacks |
| CURLOPT_CHUNK_END_FUNCTION | callback after a transfer with FTP wildcardmatch |
| CURLOPT_CLOSESOCKETDATA | pointer passed to the socket close callback |
| CURLOPT_CLOSESOCKETFUNCTION | callback to socket close replacement function |
| CURLOPT_CONNECT_ONLY | stop when connected to target server |
| CURLOPT_CONNECTTIMEOUT | timeout for the connect phase |
| CURLOPT_CONNECTTIMEOUT_MS | timeout for the connect phase |
| CURLOPT_CONNECT_TO | Connect to a specific host and port instead of the URL's host and port |
| CURLOPT_CONV_FROM_NETWORK_FUNCTION | convert data from network to host encoding |
| CURLOPT_CONV_FROM_UTF8_FUNCTION | convert data from UTF8 to host encoding |
| CURLOPT_CONV_TO_NETWORK_FUNCTION | convert data to network from host encoding |
| CURLOPT_COOKIE | set contents of HTTP Cookie header |
| CURLOPT_COOKIEFILE | file name to read cookies from |
| CURLOPT_COOKIEJAR | file name to store cookies to |
| CURLOPT_COOKIELIST | add to or manipulate cookies held in memory |
| CURLOPT_COOKIESESSION | start a new cookie session |
| CURLOPT_COPYPOSTFIELDS | have libcurl copy data to POST |
| CURLOPT_CRLF | enable/disable CRLF conversion |
| CURLOPT_CRLFILE | specify a Certificate Revocation List file |
| CURLOPT_CURLU | set URL with CURLU * |
| CURLOPT_CUSTOMREQUEST | custom string for request |
| CURLOPT_DEBUGDATA | custom pointer for debug callback |
| CURLOPT_DEBUGFUNCTION | debug callback |
| CURLOPT_DEFAULT_PROTOCOL | default protocol to use if the URL is missing a scheme name |
| CURLOPT_DIRLISTONLY | ask for names only in a directory listing |
| CURLOPT_DISALLOW_USERNAME_IN_URL | disallow specifying username in the url |
| CURLOPT_DNS_CACHE_TIMEOUT | set life-time for DNS cache entries |
| CURLOPT_DNS_INTERFACE | set interface to speak DNS over |
| CURLOPT_DNS_LOCAL_IP4 | IPv4 address to bind DNS resolves to |
| CURLOPT_DNS_LOCAL_IP6 | IPv6 address to bind DNS resolves to |
| CURLOPT_DNS_SERVERS | set preferred DNS servers |
| CURLOPT_DNS_SHUFFLE_ADDRESSES | Shuffle addresses when a hostname returns more than one |
| CURLOPT_DNS_USE_GLOBAL_CACHE | enable/disable global DNS cache |
| CURLOPT_DOH_URL | provide the DNS-over-HTTPS URL |
| CURLOPT_EGDSOCKET | set EGD socket path |
| CURLOPT_ERRORBUFFER | set error buffer for error messages |
| CURLOPT_EXPECT_100_TIMEOUT_MS | timeout for Expect: 100-continue response |
| CURLOPT_FAILONERROR | request failure on HTTP response >= 400 |
| CURLOPT_FILETIME | get the modification time of the remote resource |
| CURLOPT_FNMATCH_DATA | custom pointer to fnmatch callback |
| CURLOPT_FNMATCH_FUNCTION | wildcard matching function callback |
| CURLOPT_FOLLOWLOCATION | follow HTTP 3xx redirects |
| CURLOPT_FORBID_REUSE | make connection get closed at once after use |
| CURLOPT_FRESH_CONNECT | force a new connection to be used |
| CURLOPT_FTP_ACCOUNT | set account info for FTP |
| CURLOPT_FTP_ALTERNATIVE_TO_USER | command to use instead of USER with FTP |
| CURLOPT_FTP_CREATE_MISSING_DIRS | create missing dirs for FTP and SFTP |
| CURLOPT_FTP_FILEMETHOD | select directory traversing method for FTP |
| CURLOPT_FTPPORT | make FTP transfer active |
| CURLOPT_FTP_RESPONSE_TIMEOUT | time allowed to wait for FTP response |
| CURLOPT_FTP_SKIP_PASV_IP | ignore the IP address in the PASV response |
| CURLOPT_FTPSSLAUTH | set order in which to attempt TLS vs SSL when using FTP |
| CURLOPT_FTP_SSL_CCC | switch off SSL again with FTP after auth |
| CURLOPT_FTP_USE_EPRT | enable/disable use of EPRT with FTP |
| CURLOPT_FTP_USE_EPSV | enable/disable use of EPSV |
| CURLOPT_FTP_USE_PRET | enable the PRET command |
| CURLOPT_GSSAPI_DELEGATION | set allowed GSS-API delegation |
| CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS | head start for ipv6 for happy eyeballs |
| CURLOPT_HAPROXYPROTOCOL | send HAProxy PROXY protocol v1 header |
| CURLOPT_HEADER | pass headers to the data stream |
| CURLOPT_HEADERDATA | pointer to pass to header callback |
| CURLOPT_HEADERFUNCTION | callback that receives header data |
| CURLOPT_HEADEROPT | set how to send HTTP headers |
| CURLOPT_HTTP200ALIASES | specify alternative matches for HTTP 200 OK |
| CURLOPT_HTTPAUTH | set HTTP server authentication methods to try |
| CURLOPT_HTTP_CONTENT_DECODING | enable/disable HTTP content decoding |
| CURLOPT_HTTPGET | ask for an HTTP GET request |
| CURLOPT_HTTPHEADER | set custom HTTP headers |
| CURLOPT_HTTPPOST | specify the multipart formpost content |
| CURLOPT_HTTPPROXYTUNNEL | tunnel through HTTP proxy |
| CURLOPT_HTTP_TRANSFER_DECODING | enable/disable HTTP transfer decoding |
| CURLOPT_HTTP_VERSION | specify HTTP protocol version to use |
| CURLOPT_IGNORE_CONTENT_LENGTH | ignore content length |
| CURLOPT_INFILESIZE | set size of the input file to send off |
| CURLOPT_INFILESIZE_LARGE | set size of the input file to send off |
| CURLOPT_INTERFACE | source interface for outgoing traffic |
| CURLOPT_INTERLEAVEDATA | custom pointer passed to RTSP interleave callback |
| CURLOPT_INTERLEAVEFUNCTION | callback function for RTSP interleaved data |
| CURLOPT_IOCTLDATA | custom pointer passed to I/O callback |
| CURLOPT_IOCTLFUNCTION | callback for I/O operations |
| CURLOPT_IPRESOLVE | specify which IP protocol version to use |
| CURLOPT_ISSUERCERT | issuer SSL certificate filename |
| CURLOPT_KEEP_SENDING_ON_ERROR | keep sending on early HTTP response >= 300 |
| CURLOPT_KEYPASSWD | set passphrase to private key |
| CURLOPT_KRBLEVEL | set FTP kerberos security level |
| CURLOPT_LOCALPORT | set local port number to use for socket |
| CURLOPT_LOCALPORTRANGE | number of additional local ports to try |
| CURLOPT_LOGIN_OPTIONS | set login options |
| CURLOPT_LOW_SPEED_LIMIT | set low speed limit in bytes per second |
| CURLOPT_LOW_SPEED_TIME | set low speed limit time period |
| CURLOPT_MAIL_AUTH | SMTP authentication address |
| CURLOPT_MAIL_FROM | SMTP sender address |
| CURLOPT_MAIL_RCPT | list of SMTP mail recipients |
| CURLOPT_MAXCONNECTS | maximum connection cache size |
| CURLOPT_MAXFILESIZE | maximum file size allowed to download |
| CURLOPT_MAXFILESIZE_LARGE | maximum file size allowed to download |
| CURLOPT_MAX_RECV_SPEED_LARGE | rate limit data download speed |
| CURLOPT_MAXREDIRS | maximum number of redirects allowed |
| CURLOPT_MAX_SEND_SPEED_LARGE | rate limit data upload speed |
| CURLOPT_MIMEPOST | set post/send data from mime structure |
| CURLOPT_NETRC | request that .netrc is used |
| CURLOPT_NETRC_FILE | file name to read .netrc info from |
| CURLOPT_NEW_DIRECTORY_PERMS | permissions for remotely created directories |
| CURLOPT_NEW_FILE_PERMS | permissions for remotely created files |
| CURLOPT_NOBODY | do the download request without getting the body |
| CURLOPT_NOPROGRESS | switch off the progress meter |
| CURLOPT_NOPROXY | disable proxy use for specific hosts |
| CURLOPT_NOSIGNAL | skip all signal handling |
| CURLOPT_OPENSOCKETDATA | custom pointer passed to open socket callback |
| CURLOPT_OPENSOCKETFUNCTION | set callback for opening sockets |
| CURLOPT_PASSWORD | password to use in authentication |
| CURLOPT_PATH_AS_IS | do not handle dot dot sequences |
| CURLOPT_PINNEDPUBLICKEY | set pinned public key |
| CURLOPT_PIPEWAIT | wait for pipelining/multiplexing |
| CURLOPT_PORT | set remote port number to work with |
| CURLOPT_POST | request an HTTP POST |
| CURLOPT_POSTFIELDS | specify data to POST to server |
| CURLOPT_POSTFIELDSIZE | size of POST data pointed to |
| CURLOPT_POSTFIELDSIZE_LARGE | size of POST data pointed to |
| CURLOPT_POSTQUOTE | (S)FTP commands to run after the transfer |
| CURLOPT_POSTREDIR | how to act on an HTTP POST redirect |
| CURLOPT_PRE_PROXY | set pre-proxy to use |
| CURLOPT_PREQUOTE | commands to run before an FTP transfer |
| CURLOPT_PRIVATE | store a private pointer |
| CURLOPT_PROGRESSDATA | custom pointer passed to the progress callback |
| CURLOPT_PROGRESSFUNCTION | callback to progress meter function |
| CURLOPT_PROTOCOLS | set allowed protocols |
| CURLOPT_PROXY | set proxy to use |
| CURLOPT_PROXYAUTH | set HTTP proxy authentication methods to try |
| CURLOPT_PROXY_CAINFO | path to proxy Certificate Authority (CA) bundle |
| CURLOPT_PROXY_CAPATH | specify directory holding proxy CA certificates |
| CURLOPT_PROXY_CRLFILE | specify a proxy Certificate Revocation List file |
| CURLOPT_PROXYHEADER | custom HTTP headers to pass to proxy |
| CURLOPT_PROXY_KEYPASSWD | set passphrase to proxy private key |
| CURLOPT_PROXYPASSWORD | password to use with proxy authentication |
| CURLOPT_PROXY_PINNEDPUBLICKEY | set pinned public key for https proxy |
| CURLOPT_PROXYPORT | port number the proxy listens on |
| CURLOPT_PROXY_SERVICE_NAME | proxy authentication service name |
| CURLOPT_PROXY_SSLCERT | set SSL proxy client certificate |
| CURLOPT_PROXY_SSLCERTTYPE | specify type of the proxy client SSL certificate |
| CURLOPT_PROXY_SSL_CIPHER_LIST | specify ciphers to use for proxy TLS |
| CURLOPT_PROXY_SSLKEY | specify private keyfile for TLS and SSL proxy client cert |
| CURLOPT_PROXY_SSLKEYTYPE | set type of the proxy private key file |
| CURLOPT_PROXY_SSL_OPTIONS | set proxy SSL behavior options |
| CURLOPT_PROXY_SSL_VERIFYHOST | verify the proxy certificate's name against host |
| CURLOPT_PROXY_SSL_VERIFYPEER | verify the proxy's SSL certificate |
| CURLOPT_PROXY_SSLVERSION | set preferred proxy TLS/SSL version |
| CURLOPT_PROXY_TLS13_CIPHERS | ciphers suites for proxy TLS 1.3 |
| CURLOPT_PROXY_TLSAUTH_PASSWORD | password to use for proxy TLS authentication |
| CURLOPT_PROXY_TLSAUTH_TYPE | set proxy TLS authentication methods |
| CURLOPT_PROXY_TLSAUTH_USERNAME | user name to use for proxy TLS authentication |
| CURLOPT_PROXY_TRANSFER_MODE | append FTP transfer mode to URL for proxy |
| CURLOPT_PROXYTYPE | proxy protocol type |
| CURLOPT_PROXYUSERNAME | user name to use for proxy authentication |
| CURLOPT_PROXYUSERPWD | user name and password to use for proxy authentication |
| CURLOPT_PUT | make an HTTP PUT request |
| CURLOPT_QUOTE | (S)FTP commands to run before transfer |
| CURLOPT_RANDOM_FILE | specify a source for random data |
| CURLOPT_RANGE | set byte range to request |
| CURLOPT_READDATA | custom pointer passed to the read callback |
| CURLOPT_READFUNCTION | read callback for data uploads |
| CURLOPT_REDIR_PROTOCOLS | set protocols allowed to redirect to |
| CURLOPT_REFERER | set the HTTP referer header |
| CURLOPT_REQUEST_TARGET | specify an alternative target for this request |
| CURLOPT_RESOLVE | provide custom host name to IP address resolves |
| CURLOPT_RESOLVER_START_DATA | custom pointer passed to the resolver start callback |
| CURLOPT_RESOLVER_START_FUNCTION | set callback to be called before a new resolve request is started |
| CURLOPT_RESUME_FROM | set a point to resume transfer from |
| CURLOPT_RESUME_FROM_LARGE | set a point to resume transfer from |
| CURLOPT_RTSP_CLIENT_CSEQ | set the RTSP client CSEQ number |
| CURLOPT_RTSP_REQUEST | specify RTSP request |
| CURLOPT_RTSP_SERVER_CSEQ | set the RTSP server CSEQ number |
| CURLOPT_RTSP_SESSION_ID | set RTSP session ID |
| CURLOPT_RTSP_STREAM_URI | set RTSP stream URI |
| CURLOPT_RTSP_TRANSPORT | set RTSP Transport: header |
| CURLOPT_SASL_IR | enable sending initial response in first packet |
| CURLOPT_SEEKDATA | custom pointer passed to the seek callback |
| CURLOPT_SEEKFUNCTION | user callback for seeking in input stream |
| CURLOPT_SERVICE_NAME | authentication service name |
| CURLOPT_SHARE | specify share handle to use |
| CURLOPT_SOCKOPTDATA | custom pointer to pass to sockopt callback |
| CURLOPT_SOCKOPTFUNCTION | set callback for setting socket options |
| CURLOPT_SOCKS5_AUTH | set allowed methods for SOCKS5 proxy authentication |
| CURLOPT_SOCKS5_GSSAPI_NEC | set socks proxy gssapi negotiation protection |
| CURLOPT_SOCKS5_GSSAPI_SERVICE | SOCKS5 proxy authentication service name |
| CURLOPT_SSH_AUTH_TYPES | set desired auth types for SFTP and SCP |
| CURLOPT_SSH_COMPRESSION | enables compression / decompression of SSH traffic |
| CURLOPT_SSH_HOST_PUBLIC_KEY_MD5 | checksum of SSH server public key |
| CURLOPT_SSH_KEYDATA | pointer to pass to the SSH key callback |
| CURLOPT_SSH_KEYFUNCTION | callback for known host matching logic |
| CURLOPT_SSH_KNOWNHOSTS | file name holding the SSH known hosts |
| CURLOPT_SSH_PRIVATE_KEYFILE | set private key file for SSH auth |
| CURLOPT_SSH_PUBLIC_KEYFILE | set public key file for SSH auth |
| CURLOPT_SSLCERT | set SSL client certificate |
| CURLOPT_SSLCERTTYPE | specify type of the client SSL certificate |
| CURLOPT_SSL_CIPHER_LIST | specify ciphers to use for TLS |
| CURLOPT_SSL_CTX_DATA | custom pointer passed to ssl_ctx callback |
| CURLOPT_SSL_CTX_FUNCTION | SSL context callback for OpenSSL, wolfSSL/CyaSSL or mbedTLS |
| CURLOPT_SSL_ENABLE_ALPN | enable ALPN |
| CURLOPT_SSL_ENABLE_NPN | enable NPN |
| CURLOPT_SSLENGINE | set SSL engine identifier |
| CURLOPT_SSLENGINE_DEFAULT | make SSL engine default |
| CURLOPT_SSL_FALSESTART | enable TLS false start |
| CURLOPT_SSLKEY | specify private keyfile for TLS and SSL client cert |
| CURLOPT_SSLKEYTYPE | set type of the private key file |
| CURLOPT_SSL_OPTIONS | set SSL behavior options |
| CURLOPT_SSL_SESSIONID_CACHE | enable/disable use of the SSL session-ID cache |
| CURLOPT_SSL_VERIFYHOST | verify the certificate's name against host |
| CURLOPT_SSL_VERIFYPEER | verify the peer's SSL certificate |
| CURLOPT_SSL_VERIFYSTATUS | verify the certificate's status |
| CURLOPT_SSLVERSION | set preferred TLS/SSL version |
| CURLOPT_STDERR | redirect stderr to another stream |
| CURLOPT_STREAM_DEPENDS | set stream this transfer depends on |
| CURLOPT_STREAM_DEPENDS_E | set stream this transfer depends on exclusively |
| CURLOPT_STREAM_WEIGHT | set numerical stream weight |
| CURLOPT_SUPPRESS_CONNECT_HEADERS | Suppress proxy CONNECT response headers from user callbacks |
| CURLOPT_TCP_FASTOPEN | enable TCP Fast Open |
| CURLOPT_TCP_KEEPALIVE | enable TCP keep-alive probing |
| CURLOPT_TCP_KEEPIDLE | set TCP keep-alive idle time wait |
| CURLOPT_TCP_KEEPINTVL | set TCP keep-alive interval |
| CURLOPT_TCP_NODELAY | set the TCP_NODELAY option |
| CURLOPT_TELNETOPTIONS | custom telnet options |
| CURLOPT_TFTP_BLKSIZE | TFTP block size |
| CURLOPT_TFTP_NO_OPTIONS | Do not send TFTP options requests. |
| CURLOPT_TIMECONDITION | select condition for a time request |
| CURLOPT_TIMEOUT | set maximum time the request is allowed to take |
| CURLOPT_TIMEOUT_MS | set maximum time the request is allowed to take |
| CURLOPT_TIMEVALUE | set time value for conditional |
| CURLOPT_TIMEVALUE_LARGE | set time value for conditional |
| CURLOPT_TLS13_CIPHERS | specify ciphers suites to use for TLS 1.3 |
| CURLOPT_TLSAUTH_PASSWORD | password to use for TLS authentication |
| CURLOPT_TLSAUTH_TYPE | set TLS authentication methods |
| CURLOPT_TLSAUTH_USERNAME | user name to use for TLS authentication |
| CURLOPT_TRANSFER_ENCODING | ask for HTTP Transfer Encoding |
| CURLOPT_TRANSFERTEXT | request a text based transfer for FTP |
| CURLOPT_UNIX_SOCKET_PATH | set Unix domain socket |
| CURLOPT_UNRESTRICTED_AUTH | send credentials to other hosts too |
| CURLOPT_UPKEEP_INTERVAL_MS | connection upkeep interval |
| CURLOPT_UPLOAD | enable data upload |
| CURLOPT_UPLOAD_BUFFERSIZE | set preferred upload buffer size |
| CURLOPT_URL | provide the URL to use in the request |
| CURLOPT_USERAGENT | set HTTP user-agent header |
| CURLOPT_USERNAME | user name to use in authentication |
| CURLOPT_USERPWD | user name and password to use in authentication |
| CURLOPT_USE_SSL | request using SSL / TLS for the transfer |
| CURLOPT_VERBOSE | set verbose mode on/off |
| CURLOPT_WILDCARDMATCH | enable directory wildcard transfers |
| CURLOPT_WRITEDATA | custom pointer passed to the write callback |
| CURLOPT_WRITEFUNCTION | set callback for writing received data |
| CURLOPT_XFERINFODATA | custom pointer passed to the progress callback |
| CURLOPT_XFERINFOFUNCTION | callback to progress meter function |
| CURLOPT_XOAUTH2_BEARER | specify OAuth 2.0 access token |
| curl_share_cleanup | Clean up a shared object |
| curl_share_init | Create a shared object |
| curl_share_setopt | Set options for a shared object |
| curl_share_strerror | return string describing error code |
| curl_slist_append | add a string to an slist |
| curl_slist_free_all | free an entire curl_slist list |
| curl_strequal | case insensitive string comparisons |
| curl_unescape | URL decodes the given string |
| curl_url | returns a new CURLU handle |
| curl_url_cleanup | free a CURLU handle |
| curl_url_dup | duplicate a CURLU handle |
| curl_url_get | extract a part from a URL |
| curl_url_set | set a URL part |
| curl_version | returns the libcurl version string |
| curl_version_info | returns run-time libcurl version info |
| libcurl | client-side URL transfers |
| libcurl-easy | easy interface overview |
| libcurl-env | environment variables libcurl understands |
| libcurl-errors | error codes in libcurl |
| libcurl-multi | how to use the multi interface |
| libcurl-security | security considerations when using libcurl |
| libcurl-share | how to use the share interface |
| libcurl-symbols | libcurl symbol version information |
| libcurl-thread | libcurl thread safety |
| libcurl-tutorial | libcurl programming tutorial |
| libcurl-url | URL interface overview |