changes

1 files changed, 61 insertions, 0 deletions

diff --git a/pkgs/yossh/examples/mega_bastion.lua b/pkgs/yossh/examples/mega_bastion.lua
new file mode 100644
index 0000000..d4eb3ee
--- /dev/null
+++ b/pkgs/yossh/examples/mega_bastion.lua
@@ -0,0 +1,61 @@
+-- situation: fictional network where there are three departments:
+--   - tech (172.16.10.0/24)
+--   - HR (172.16.20.0/24)
+--   - Secretary (172.16.40.0/24)
+-- Each department has
+--   - an ssh bastion server at .1:22 (only way to access other devices on the subnet from outside the subnet)
+--   - a shared sftp server at .2:25
+-- 
+-- This exact yoshi script would be deployed to all personal computers inside the network.
+local yoshi = dofile"yoshi.lua"
+
+local function inNetwork()
+  -- company internal landing page
+  local _, _, code = os.execute("nc -z -w1 172.16.0.1 443")
+  return code == 0
+end
+
+local function currDept()
+  local ip_addr = io.popen("hostname -I")
+  local _, _, third_octet, _ = string.gmatch(ip_addr, "%d%.%d%.%d%.%d")
+
+  return third_octet
+end
+
+local depts = {
+  tech = 10,
+  hr = 20,
+  secretary = 40
+}
+
+yoshi.hosts["global-bastion"] = yoshi.ssh{
+  HostName = "bastion.company-website.com",
+  Port = 2222
+}
+
+for name, subnet in pairs(depts) do
+  yoshi.hosts[name.."-bastion"] = function()
+    return yoshi.ssh{
+      HostName = "172.16."..subnet..".1",
+      ProxyJump = inNetwork() or "global-bastion"
+    }
+  end
+
+  yoshi.hosts[name.."-fileserver"] = function()
+    return yoshi.ssh{
+      HostName = "172.16."..subnet..".2",
+      SessionType = "none",
+      LocalForward = {2225, 25},
+      ProxyJump = inNetwork() and currDept() == subnet or name.."-bastion"
+    }
+  end
+end
+
+yoshi.hosts[name.."-db"] = yoshi.ssh{
+  HostName = "172.16.10.3",
+  SessionType = "none",
+  LocalForward = 5432,
+  ProxyJump = inNetwork() and currDept() == subnet or "tech-bastion"
+}
+
+yoshi.run(arg, {dry_run = true})