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package netbox
import (
"context"
"encoding/json"
"fmt"
"io"
"net"
"net/http"
"net/url"
"strconv"
)
type NetboxClient interface {
GetSitePrefixesWithTag(ctx context.Context, site string, tag string) ([]*net.IPNet, error)
GetPrefixesWithTag(ctx context.Context, tag string) ([]*net.IPNet, error)
GetServicesForVm(ctx context.Context, vmName string) ([]*Service, error)
}
type BasicNetboxClient struct {
ApiKey string
Endpoint string
}
var _ NetboxClient = (*BasicNetboxClient)(nil)
func (c *BasicNetboxClient) makeRequestRaw(ctx context.Context, method, u string, ib io.Reader, o interface{}) error {
req, err := http.NewRequestWithContext(ctx, method, u, ib)
if err != nil {
return err
}
req.Header.Add("Authorization", fmt.Sprintf("Token %s", c.ApiKey))
res, err := http.DefaultClient.Do(req)
if err != nil {
return err
}
defer res.Body.Close()
if res.StatusCode != http.StatusOK {
apiError := &ApiError{Status: res.StatusCode}
if err = json.NewDecoder(res.Body).Decode(apiError); err != nil {
return fmt.Errorf("Netbox JSON decode error while parsing error with status %d: %w", res.StatusCode, err)
}
return apiError
}
if err = json.NewDecoder(res.Body).Decode(o); err != nil {
return err
}
return nil
}
func (c *BasicNetboxClient) makeRequest(ctx context.Context, method, path string, q url.Values, ib io.Reader, o interface{}) error {
u, err := url.Parse(c.Endpoint)
if err != nil {
return err
}
u.Path = path
u.RawQuery = q.Encode()
return c.makeRequestRaw(ctx, method, u.String(), ib, o)
}
func (c *BasicNetboxClient) GetSitePrefixesWithTag(ctx context.Context, site string, tag string) ([]*net.IPNet, error) {
s, err := c.resolveSiteNameToId(ctx, site)
if err != nil {
return nil, err
}
out := []*net.IPNet{}
q := url.Values{}
q.Add("site_id", strconv.Itoa(s))
q.Add("tag", tag)
page := &PrefixList{}
if err := c.makeRequest(ctx, http.MethodGet, "/api/ipam/prefixes/", q, nil, page); err != nil {
return nil, err
}
for _, r := range page.Results {
_, ipnet, err := net.ParseCIDR(r.Prefix)
if err != nil {
return nil, err
}
out = append(out, ipnet)
}
for page.Next != "" {
page = &PrefixList{}
if err := c.makeRequestRaw(ctx, http.MethodGet, page.Next, nil, page); err != nil {
return nil, err
}
for _, r := range page.Results {
_, ipnet, err := net.ParseCIDR(r.Prefix)
if err != nil {
return nil, err
}
out = append(out, ipnet)
}
}
return out, nil
}
func (c *BasicNetboxClient) GetPrefixesWithTag(ctx context.Context, tag string) ([]*net.IPNet, error) {
out := []*net.IPNet{}
q := url.Values{}
q.Add("tag", tag)
page := &PrefixList{}
if err := c.makeRequest(ctx, http.MethodGet, "/api/ipam/prefixes/", q, nil, page); err != nil {
return nil, err
}
for _, r := range page.Results {
_, ipnet, err := net.ParseCIDR(r.Prefix)
if err != nil {
return nil, err
}
out = append(out, ipnet)
}
for page.Next != "" {
page = &PrefixList{}
if err := c.makeRequestRaw(ctx, http.MethodGet, page.Next, nil, page); err != nil {
return nil, err
}
for _, r := range page.Results {
_, ipnet, err := net.ParseCIDR(r.Prefix)
if err != nil {
return nil, err
}
out = append(out, ipnet)
}
}
return out, nil
}
func (c *BasicNetboxClient) resolveSiteNameToId(ctx context.Context, s string) (int, error) {
q := url.Values{}
q.Add("name", s)
out := &SiteList{}
if err := c.makeRequest(ctx, http.MethodGet, "/api/dcim/sites/", q, nil, out); err != nil {
return 0, err
}
if len(out.Results) == 0 {
return 0, fmt.Errorf("resolveSiteNameToId: no results returned from netbox")
}
return out.Results[0].ID, nil
}
func (c *BasicNetboxClient) GetServicesForVm(ctx context.Context, vmName string) ([]*Service, error) {
out := []*Service{}
q := url.Values{}
q.Add("virtual_machine", vmName)
page := &ServiceList{}
if err := c.makeRequest(ctx, http.MethodGet, "/api/ipam/services/", q, nil, page); err != nil {
return nil, err
}
for _, r := range page.Results {
out = append(out, r)
}
for page.Next != "" {
page = &ServiceList{}
if err := c.makeRequestRaw(ctx, http.MethodGet, page.Next, nil, page); err != nil {
return nil, err
}
for _, r := range page.Results {
out = append(out, r)
}
}
return out, nil
}
|
