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• ZMQ_AFFINITY:
• ZMQ_BACKLOG: set maximum length of the queue of outstanding connections;
• ZMQ_BINDTODEVICE: binds the socket to an interface;
• ZMQ_CONNECT_TIMEOUT: sets how long to wait before timeout a connect syscall.

CURVE options

• ZMQ_CURVE_PUBLICKEY

• ZMQ_CURVE_SECRETKEY

• ZMQ_CURVE_SERVERKEY

• ZMQ_EVENTS

(preallocated) FD options

• ZMQ_USE_FD
• ZMQ_FD

GSSAPI options

• ZMQ_GSSAPI_PLAINTEXT

• ZMQ_GSSAPI_PRINCIPAL

• ZMQ_GSSAPI_PRINCIPAL_NAMETYPE

• ZMQ_GSSAPI_SERVER

• ZMQ_GSSAPI_SERVICE_PRINCIPAL

• ZMQ_GSSAPI_SERVICE_PRINCIPAL_NAMETYPE

• ZMQ_HANDSHAKE_IVL

• ZMQ_IDENTITY

• ZMQ_IMMEDIATE

• ZMQ_INVERT_MATCHING

• ZMQ_IPV4ONLY

• ZMQ_IPV6

• ZMQ_LAST_ENDPOINT

• ZMQ_LINGER

• ZMQ_MAXMSGSIZE

• ZMQ_MECHANISM

• ZMQ_PLAIN_USERNAME

• ZMQ_PLAIN_PASSWORD

• ZMQ_PLAIN_SERVER

• ZMQ_RCVHWM

• ZMQ_RCVBUF

• ZMQ_RCVMORE

• ZMQ_RCVTIMEO

• ZMQ_RECONNECT_IVL

• ZMQ_RECONNECT_IVL_MAX

• ZMQ_RECONNECT_STOP

• ZMQ_RECOVERY_IVL

• ZMQ_ROUTING_ID

• ZMQ_SNDBUF

• ZMQ_SNDHWM

• ZMQ_SNDTIMEO

• ZMQ_RECONNECT_

• ZMQ_SOCKS_PROXY

• ZMQ_TCP_KEEPALIVE_CNT

• ZMQ_TCP_KEEPALIVE_IDLE

• ZMQ_TCP_KEEPALIVE_INTVL

• ZMQ_TCP_MAXRT

• ZMQ_THREAD_SAFE

• ZMQ_TOS

• ZMQ_TYPE

• ZMQ_ZAP_DOMAIN

• ZMQ_ZAP_ENFORCE_DOMAIN

• ZMQ_ROUTER_NOTIFY

• ZMQ_IN_BATCH_SIZE

• ZMQ_OUT_BATCH_SIZE

• ZMQ_TOPICS_COUNT

VMCI options

• ZMQ_VMCI_BUFFER_SIZE

• ZMQ_VMCI_BUFFER_MAX_SIZE

• ZMQ_VMCI_CONNECT_TIMEOUT

• `ZMQ_MULTICAST_LOOP

NORM options

• ZMQ_NORM_MODE
• ZMQ_NORM_UNICAST_NACK
• ZMQ_NORM_BUFFER_SIZE
• ZMQ_NORM_SEGMENT_SIZE
• ZMQ_NORM_BLOCK_SIZE
• ZMQ_NORM_NUM_PARITY
• ZMQ_NORM_NUM_AUTOPARITY
• ZMQ_NORM_PUSH