telebit/rvpn/connection/connection_table.go

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package connection
import "fmt"
const (
initialDomains = 0
incrementDomains = 0
)
//Table maintains the set of connections
type Table struct {
connections map[*Connection][]string
domains map[string]*Connection
register chan *Connection
unregister chan *Connection
domainAnnounce chan *DomainMapping
domainRevoke chan *DomainMapping
}
//NewTable -- consructor
func NewTable() (p *Table) {
p = new(Table)
p.connections = make(map[*Connection][]string)
p.domains = make(map[string]*Connection)
p.register = make(chan *Connection)
p.unregister = make(chan *Connection)
p.domainAnnounce = make(chan *DomainMapping)
p.domainRevoke = make(chan *DomainMapping)
return
}
//ConnByDomain -- Obtains a connection from a domain announcement.
func (c *Table) ConnByDomain(domain string) (conn *Connection, ok bool) {
conn, ok = c.domains[domain]
return
}
//Run -- Execute
func (c *Table) Run() {
loginfo.Println("ConnectionTable starting")
for {
select {
case connection := <-c.register:
loginfo.Println("register fired")
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c.connections[connection] = make([]string, initialDomains)
connection.commCh <- true
// handle initial domain additions
for _, domain := range connection.initialDomains {
// add to the domains regirstation
newDomain := string(domain.(string))
loginfo.Println("adding domain ", newDomain, " to connection ", connection)
c.domains[newDomain] = connection
// add to the connection domain list
s := c.connections[connection]
c.connections[connection] = append(s, newDomain)
}
loginfo.Println("register exiting")
case connection := <-c.unregister:
loginfo.Println("closing connection ", connection)
if _, ok := c.connections[connection]; ok {
for _, domain := range c.connections[connection] {
fmt.Println("removing domain ", domain)
if _, ok := c.domains[domain]; ok {
delete(c.domains, domain)
}
}
delete(c.connections, connection)
close(connection.send)
}
case domainMapping := <-c.domainAnnounce:
loginfo.Println("domainMapping fired ", domainMapping)
//check to make sure connection is already regiered, you can no register a domain without an apporved connection
//if connection, ok := connections[domainMapping.connection]; ok {
//} else {
//}
}
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fmt.Println("domain ", c.domains)
fmt.Println("connections ", c.connections)
}
}
//Register -- Property
func (c *Table) Register() (r chan *Connection) {
r = c.register
return
}