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swarm.go
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swarm.go
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package commands
import (
"bytes"
"fmt"
"io"
"sort"
cmds "github.com/jbenet/go-ipfs/commands"
peer "github.com/jbenet/go-ipfs/p2p/peer"
errors "github.com/jbenet/go-ipfs/util/debugerror"
iaddr "github.com/jbenet/go-ipfs/util/ipfsaddr"
ma "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-multiaddr"
context "github.com/jbenet/go-ipfs/Godeps/_workspace/src/golang.org/x/net/context"
)
type stringList struct {
Strings []string
}
type addrMap struct {
Addrs map[string][]string
}
var SwarmCmd = &cmds.Command{
Helptext: cmds.HelpText{
Tagline: "swarm inspection tool",
Synopsis: `
ipfs swarm peers - List peers with open connections
ipfs swarm addrs - List known addresses. Useful to debug.
ipfs swarm connect <address> - Open connection to a given address
ipfs swarm disconnect <address> - Close connection to a given address
`,
ShortDescription: `
ipfs swarm is a tool to manipulate the network swarm. The swarm is the
component that opens, listens for, and maintains connections to other
ipfs peers in the internet.
`,
},
Subcommands: map[string]*cmds.Command{
"peers": swarmPeersCmd,
"addrs": swarmAddrsCmd,
"connect": swarmConnectCmd,
"disconnect": swarmDisconnectCmd,
},
}
var swarmPeersCmd = &cmds.Command{
Helptext: cmds.HelpText{
Tagline: "List peers with open connections",
ShortDescription: `
ipfs swarm peers lists the set of peers this node is connected to.
`,
},
Run: func(req cmds.Request, res cmds.Response) {
log.Debug("ipfs swarm peers")
n, err := req.Context().GetNode()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
if n.PeerHost == nil {
res.SetError(errNotOnline, cmds.ErrClient)
return
}
conns := n.PeerHost.Network().Conns()
addrs := make([]string, len(conns))
for i, c := range conns {
pid := c.RemotePeer()
addr := c.RemoteMultiaddr()
addrs[i] = fmt.Sprintf("%s/ipfs/%s", addr, pid.Pretty())
}
sort.Sort(sort.StringSlice(addrs))
res.SetOutput(&stringList{addrs})
},
Marshalers: cmds.MarshalerMap{
cmds.Text: stringListMarshaler,
},
Type: stringList{},
}
var swarmAddrsCmd = &cmds.Command{
Helptext: cmds.HelpText{
Tagline: "List known addresses. Useful to debug.",
ShortDescription: `
ipfs swarm addrs lists all addresses this node is aware of.
`,
},
Run: func(req cmds.Request, res cmds.Response) {
n, err := req.Context().GetNode()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
if n.PeerHost == nil {
res.SetError(errNotOnline, cmds.ErrClient)
return
}
addrs := make(map[string][]string)
ps := n.PeerHost.Network().Peerstore()
for _, p := range ps.Peers() {
s := p.Pretty()
for _, a := range ps.Addrs(p) {
addrs[s] = append(addrs[s], a.String())
}
sort.Sort(sort.StringSlice(addrs[s]))
}
res.SetOutput(&addrMap{Addrs: addrs})
},
Marshalers: cmds.MarshalerMap{
cmds.Text: func(res cmds.Response) (io.Reader, error) {
m, ok := res.Output().(*addrMap)
if !ok {
return nil, errors.New("failed to cast map[string]string")
}
// sort the ids first
ids := make([]string, 0, len(m.Addrs))
for p := range m.Addrs {
ids = append(ids, p)
}
sort.Sort(sort.StringSlice(ids))
var buf bytes.Buffer
for _, p := range ids {
paddrs := m.Addrs[p]
buf.WriteString(fmt.Sprintf("%s (%d)\n", p, len(paddrs)))
for _, addr := range paddrs {
buf.WriteString("\t" + addr + "\n")
}
}
return &buf, nil
},
},
Type: addrMap{},
}
var swarmConnectCmd = &cmds.Command{
Helptext: cmds.HelpText{
Tagline: "Open connection to a given address",
ShortDescription: `
'ipfs swarm connect' opens a connection to a peer address. The address format
is an ipfs multiaddr:
ipfs swarm connect /ip4/104.131.131.82/tcp/4001/ipfs/QmaCpDMGvV2BGHeYERUEnRQAwe3N8SzbUtfsmvsqQLuvuJ
`,
},
Arguments: []cmds.Argument{
cmds.StringArg("address", true, true, "address of peer to connect to").EnableStdin(),
},
Run: func(req cmds.Request, res cmds.Response) {
ctx := context.TODO()
n, err := req.Context().GetNode()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
addrs := req.Arguments()
if n.PeerHost == nil {
res.SetError(errNotOnline, cmds.ErrClient)
return
}
pis, err := peersWithAddresses(addrs)
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
output := make([]string, len(pis))
for i, pi := range pis {
output[i] = "connect " + pi.ID.Pretty()
err := n.PeerHost.Connect(ctx, pi)
if err != nil {
output[i] += " failure: " + err.Error()
} else {
output[i] += " success"
}
}
res.SetOutput(&stringList{output})
},
Marshalers: cmds.MarshalerMap{
cmds.Text: stringListMarshaler,
},
Type: stringList{},
}
var swarmDisconnectCmd = &cmds.Command{
Helptext: cmds.HelpText{
Tagline: "Close connection to a given address",
ShortDescription: `
'ipfs swarm disconnect' closes a connection to a peer address. The address format
is an ipfs multiaddr:
ipfs swarm disconnect /ip4/104.131.131.82/tcp/4001/ipfs/QmaCpDMGvV2BGHeYERUEnRQAwe3N8SzbUtfsmvsqQLuvuJ
`,
},
Arguments: []cmds.Argument{
cmds.StringArg("address", true, true, "address of peer to connect to").EnableStdin(),
},
Run: func(req cmds.Request, res cmds.Response) {
n, err := req.Context().GetNode()
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
addrs := req.Arguments()
if n.PeerHost == nil {
res.SetError(errNotOnline, cmds.ErrClient)
return
}
iaddrs, err := parseAddresses(addrs)
if err != nil {
res.SetError(err, cmds.ErrNormal)
return
}
output := make([]string, len(iaddrs))
for i, addr := range iaddrs {
taddr := addr.Transport()
output[i] = "disconnect " + addr.ID().Pretty()
found := false
conns := n.PeerHost.Network().ConnsToPeer(addr.ID())
for _, conn := range conns {
if !conn.RemoteMultiaddr().Equal(taddr) {
log.Debug("it's not", conn.RemoteMultiaddr(), taddr)
continue
}
if err := conn.Close(); err != nil {
output[i] += " failure: " + err.Error()
} else {
output[i] += " success"
}
found = true
break
}
if !found {
output[i] += " failure: conn not found"
}
}
res.SetOutput(&stringList{output})
},
Marshalers: cmds.MarshalerMap{
cmds.Text: stringListMarshaler,
},
Type: stringList{},
}
func stringListMarshaler(res cmds.Response) (io.Reader, error) {
list, ok := res.Output().(*stringList)
if !ok {
return nil, errors.New("failed to cast []string")
}
var buf bytes.Buffer
for _, s := range list.Strings {
buf.WriteString(s)
buf.WriteString("\n")
}
return &buf, nil
}
// parseAddresses is a function that takes in a slice of string peer addresses
// (multiaddr + peerid) and returns slices of multiaddrs and peerids.
func parseAddresses(addrs []string) (iaddrs []iaddr.IPFSAddr, err error) {
iaddrs = make([]iaddr.IPFSAddr, len(addrs))
for i, saddr := range addrs {
iaddrs[i], err = iaddr.ParseString(saddr)
if err != nil {
return nil, cmds.ClientError("invalid peer address: " + err.Error())
}
}
return
}
// peersWithAddresses is a function that takes in a slice of string peer addresses
// (multiaddr + peerid) and returns a slice of properly constructed peers
func peersWithAddresses(addrs []string) (pis []peer.PeerInfo, err error) {
iaddrs, err := parseAddresses(addrs)
if err != nil {
return nil, err
}
for _, iaddr := range iaddrs {
pis = append(pis, peer.PeerInfo{
ID: iaddr.ID(),
Addrs: []ma.Multiaddr{iaddr.Transport()},
})
}
return pis, nil
}