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swarm/: Enable advanced dialing requests (#2317)

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Enable advanced dialing requests both on `Swarm` and via
`NetworkBehaviourAction`. Users can now trigger a dial with a specific
set of addresses, optionally extended via
`NetworkBehaviour::addresses_of_peer`. In addition the whole process is
now modelled in a type safe way via the builder pattern.

Example of a `NetworkBehaviour` requesting a dial to a specific peer
with a set of addresses additionally extended through
`NetworkBehaviour::addresses_of_peer`:

```rust
NetworkBehaviourAction::Dial {
    opts: DialOpts::peer_id(peer_id)
              .condition(PeerCondition::Always)
              .addresses(addresses)
              .extend_addresses_through_behaviour()
              .build(),
    handler,
}
```

Example of a user requesting a dial to an unknown peer with a single
address via `Swarm`:

```rust
swarm1.dial(
    DialOpts::unknown_peer_id()
        .address(addr2.clone())
        .build()
)
```
This commit is contained in:
Max Inden
2021-11-15 14:17:23 +01:00
committed by GitHub
parent 144dc12fb6
commit 220f84a97f
53 changed files with 680 additions and 414 deletions
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4
protocols/relay/src/lib.rs
View File

@ -26,7 +26,7 @@
//! ```rust
//! # use libp2p_core::transport::memory::MemoryTransport;
//! # use libp2p_relay::{RelayConfig, new_transport_and_behaviour};
//! # use libp2p_swarm::Swarm;
//! # use libp2p_swarm::{Swarm, dial_opts::DialOpts};
//! # use libp2p_core::{identity, Multiaddr, multiaddr::Protocol, PeerId, upgrade, Transport};
//! # use libp2p_yamux::YamuxConfig;
//! # use libp2p_plaintext::PlainText2Config;
@ -62,7 +62,7 @@
//! swarm.listen_on(relay_addr).unwrap();
//!
//! // Dial node (5678) via relay node (1234).
//! swarm.dial_addr(dst_addr).unwrap();
//! swarm.dial(dst_addr).unwrap();
//! ```
//!
//! ## Terminology