Struct DialogInner 

pub struct DialogInner {

    pub role: TransactionRole,
    pub cancel_token: CancellationToken,
    pub id: Mutex<DialogId>,
    pub state: Mutex<DialogState>,
    pub local_seq: AtomicU32,
    pub local_contact: Option<Uri>,
    pub remote_contact: Mutex<Option<Contact>>,
    pub remote_seq: AtomicU32,
    pub remote_uri: Mutex<Uri>,
    pub from: From,
    pub to: Mutex<To>,
    pub credential: Option<Credential>,
    pub route_set: Mutex<Vec<Route>>,
    /* private fields */
}

Internal Dialog State and Management

DialogInner contains the core state and functionality shared between client and server dialogs. It manages dialog state transitions, sequence numbers, routing information, and communication with the transaction layer.

Key Responsibilities

• Managing dialog state transitions
• Tracking local and remote sequence numbers
• Maintaining routing information (route set, contact URIs)
• Handling authentication credentials
• Coordinating with the transaction layer

Fields

• role - Whether this is a client or server dialog
• cancel_token - Token for canceling dialog operations
• id - Unique dialog identifier
• state - Current dialog state
• local_seq - Local CSeq number for outgoing requests
• remote_seq - Remote CSeq number for incoming requests
• local_contact - Local contact URI
• remote_uri - Remote target URI
• from - From header value
• to - To header value
• credential - Authentication credentials if needed
• route_set - Route set for request routing
• endpoint_inner - Reference to the SIP endpoint
• state_sender - Channel for sending state updates
• tu_sender - Transaction user sender
• initial_request - The initial request that created this dialog

Fields

role: TransactionRole

cancel_token: CancellationToken

id: Mutex<DialogId>

state: Mutex<DialogState>

local_seq: AtomicU32

local_contact: Option<Uri>

remote_contact: Mutex<Option<Contact>>

remote_seq: AtomicU32

remote_uri: Mutex<Uri>

from: From

to: Mutex<To>

credential: Option<Credential>

route_set: Mutex<Vec<Route>>

Implementations

impl DialogInner

pub fn new( role: TransactionRole, id: DialogId, initial_request: Request, endpoint_inner: EndpointInnerRef, state_sender: DialogStateSender, credential: Option<Credential>, local_contact: Option<Uri>, tu_sender: TransactionEventSender, ) -> Result<Self>

pub fn can_cancel(&self) -> bool

pub fn is_confirmed(&self) -> bool

pub fn is_terminated(&self) -> bool

pub fn get_local_seq(&self) -> u32

pub fn increment_local_seq(&self) -> u32

pub fn update_remote_tag(&self, tag: &str) -> Result<()>