1 files changed, 169 insertions, 0 deletions

diff --git a/echo/netbox/client.go b/echo/netbox/client.go
new file mode 100644
index 0000000..aabadc8
--- /dev/null
+++ b/echo/netbox/client.go
@@ -0,0 +1,169 @@
+package netbox
+
+import (
+        "encoding/json"
+        "fmt"
+        "io"
+        "net"
+        "net/http"
+        "net/url"
+        "strconv"
+
+        "code.crute.us/mcrute/golib/vault"
+)
+
+type NetboxClient interface {
+        GetSitePrefixesWithTag(site string, tag string) ([]*net.IPNet, error)
+        GetPrefixesWithTag(tag string) ([]*net.IPNet, error)
+}
+
+func NewNetboxClientDefault() NetboxClient {
+        return &netboxClient{
+                endpoint:      "https://netbox.crute.me",
+                vaultMaterial: "infra/netbox-readonly",
+        }
+}
+
+func NewNetboxClient(endpoint string, vaultMaterial string) NetboxClient {
+        return &netboxClient{
+                endpoint:      endpoint,
+                vaultMaterial: vaultMaterial,
+        }
+}
+
+type netboxClient struct {
+        endpoint      string
+        vaultMaterial string
+}
+
+func (c *netboxClient) makeRequestRaw(method, u string, ib io.Reader, o interface{}) error {
+        apiKey, err := vault.GetVaultApiKey(c.vaultMaterial)
+        if err != nil {
+                return err
+        }
+
+        req, err := http.NewRequest(method, u, ib)
+        if err != nil {
+                return err
+        }
+        req.Header.Add("Authorization", fmt.Sprintf("Token %s", apiKey))
+
+        res, err := http.DefaultClient.Do(req)
+        if err != nil {
+                return err
+        }
+        defer res.Body.Close()
+
+        if err = json.NewDecoder(res.Body).Decode(o); err != nil {
+                return err
+        }
+
+        return nil
+}
+
+func (c *netboxClient) makeRequest(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(method, u.String(), ib, o)
+}
+
+func (c *netboxClient) GetSitePrefixesWithTag(site string, tag string) ([]*net.IPNet, error) {
+        s, err := c.resolveSiteNameToId(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(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(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 *netboxClient) GetPrefixesWithTag(tag string) ([]*net.IPNet, error) {
+        out := []*net.IPNet{}
+
+        q := url.Values{}
+        q.Add("tag", tag)
+
+        page := &PrefixList{}
+        if err := c.makeRequest(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(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 *netboxClient) resolveSiteNameToId(s string) (int, error) {
+        q := url.Values{}
+        q.Add("name", s)
+
+        out := &SiteList{}
+        if err := c.makeRequest(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
+}