0568e81701
This adds an implementation of node discovery via DNS TXT records to the go-ethereum library. The implementation doesn't match EIP-1459 exactly, the main difference being that this implementation uses separate merkle trees for tree links and ENRs. The EIP will be updated to match p2p/dnsdisc. To maintain DNS trees, cmd/devp2p provides a frontend for the p2p/dnsdisc library. The new 'dns' subcommands can be used to create, sign and deploy DNS discovery trees.
45 lines
1013 B
Go
45 lines
1013 B
Go
package cloudflare
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import (
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"encoding/json"
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"io/ioutil"
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"net/http"
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"github.com/pkg/errors"
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)
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// IPRanges contains lists of IPv4 and IPv6 CIDRs.
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type IPRanges struct {
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IPv4CIDRs []string `json:"ipv4_cidrs"`
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IPv6CIDRs []string `json:"ipv6_cidrs"`
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}
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// IPsResponse is the API response containing a list of IPs.
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type IPsResponse struct {
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Response
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Result IPRanges `json:"result"`
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}
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// IPs gets a list of Cloudflare's IP ranges.
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//
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// This does not require logging in to the API.
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//
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// API reference: https://api.cloudflare.com/#cloudflare-ips
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func IPs() (IPRanges, error) {
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resp, err := http.Get(apiURL + "/ips")
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if err != nil {
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return IPRanges{}, errors.Wrap(err, "HTTP request failed")
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}
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defer resp.Body.Close()
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return IPRanges{}, errors.Wrap(err, "Response body could not be read")
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}
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var r IPsResponse
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err = json.Unmarshal(body, &r)
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if err != nil {
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return IPRanges{}, errors.Wrap(err, errUnmarshalError)
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}
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return r.Result, nil
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}
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