wip: Testing the implications of being more aggressive in opening paths

.github/sims-patchbay/integration/1to1-nat.toml

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+# 1-to-1 transfer through NAT with relay.
+# Both: no direct connectivity expected. Fetcher/provider: holepunch should succeed.
+
+[[extends]]
+file = "../iroh-defaults.toml"
+
+[matrix]
+variant = ["both", "fetcher", "provider"]
+
+[matrix.params.variant]
+both     = { topo = "1to1-nat", expect_direct = "false" }
+fetcher  = { topo = "1to1-nat-fetcher", expect_direct = "true" }
+provider = { topo = "1to1-nat-provider", expect_direct = "true" }
+
+[sim]
+name     = "1to1-nat-${matrix.variant}"
+topology = "${matrix.topo}"
+
+[[step]]
+use  = "relay-setup"
+vars = { device = "relay" }
+
+[[step]]
+use      = "transfer-provider"
+id       = "provider"
+device   = "provider"
+requires = ["relay.ready"]
+args     = ["--no-pkarr-publish", "--no-dns-resolve",
+            "--relay-url", "https://$NETSIM_IP_relay:3340"]
+
+[[step]]
+use    = "transfer-fetcher"
+id     = "fetcher"
+device = "fetcher"
+args   = ["${provider.endpoint_id}",
+          "--no-pkarr-publish", "--no-dns-resolve",
+          "--duration=20",
+          "--relay-url",        "https://$NETSIM_IP_relay:3340",
+          "--remote-relay-url", "https://$NETSIM_IP_relay:3340",
+          "--remote-direct-address", "${provider.direct_addr}"]
+
+[[step]]
+action  = "wait-for"
+id      = "fetcher"
+timeout = "60s"
+
+[[step]]
+action = "assert"
+checks = [
+  "fetcher.size matches [0-9]+",
+]
+
+[[step]]
+when   = "${matrix.expect_direct}"
+action = "assert"
+checks = [
+  "fetcher.conn_type contains Ip",
+]

.github/sims-patchbay/integration/direct-adverse.toml

@@ -0,0 +1,47 @@
+# Direct transfer with adverse network conditions.
+
+[[extends]]
+file = "../iroh-defaults.toml"
+
+[matrix]
+cond = ["lossy", "throttled"]
+
+[matrix.params.cond]
+lossy     = { latency = "200", rate = "8000", loss = "1.0" }
+throttled = { latency = "200", rate = "4000", loss = "0" }
+
+[sim]
+name     = "direct-${matrix.cond}"
+topology = "1to1"
+
+[[step]]
+action    = "set-link-condition"
+device    = "fetcher"
+condition = { latency_ms = "${matrix.latency}", rate_kbit = "${matrix.rate}", loss_pct = "${matrix.loss}" }
+
+[[step]]
+use    = "transfer-provider"
+id     = "provider"
+device = "provider"
+args   = ["--no-pkarr-publish", "--no-dns-resolve"]
+
+[[step]]
+use    = "transfer-fetcher"
+id     = "fetcher"
+device = "fetcher"
+args   = ["${provider.endpoint_id}",
+          "--no-pkarr-publish", "--no-dns-resolve",
+          "--duration=30",
+          "--remote-direct-address", "${provider.direct_addr}"]
+
+[[step]]
+action  = "wait-for"
+id      = "fetcher"
+timeout = "120s"
+
+[[step]]
+action = "assert"
+checks = [
+  "fetcher.size matches [0-9]+",
+  "fetcher.conn_type contains Ip",
+]

.github/sims-patchbay/integration/interface-down-up.toml

@@ -0,0 +1,60 @@
+[[extends]]
+file = "../iroh-defaults.toml"
+
+[sim]
+name     = "interface-down-up"
+topology = "1to1-nat-down-up"
+
+[[step]]
+use  = "relay-setup"
+vars = { device = "relay" }
+
+[[step]]
+use      = "transfer-provider"
+id       = "provider"
+device   = "provider"
+requires = ["relay.ready"]
+args     = ["--no-pkarr-publish", "--no-dns-resolve",
+            "--relay-url", "https://$NETSIM_IP_relay:3340"]
+
+[[step]]
+use    = "transfer-fetcher"
+id     = "fetcher"
+device = "fetcher"
+args   = ["${provider.endpoint_id}",
+          "--no-pkarr-publish", "--no-dns-resolve",
+          "--duration=15",
+          "--relay-url",        "https://$NETSIM_IP_relay:3340",
+          "--remote-relay-url", "https://$NETSIM_IP_relay:3340",
+          "--remote-direct-address", "${provider.direct_addr}"]
+
+# After 5s, bring interface down
+[[step]]
+action = "wait"
+duration = "5s"
+
+[[step]]
+action    = "link-down"
+device    = "fetcher"
+interface = "eth0"
+
+# After 10s total, bring interface back up
+[[step]]
+action = "wait"
+duration = "5s"
+
+[[step]]
+action    = "link-up"
+device    = "fetcher"
+interface = "eth0"
+
+[[step]]
+action  = "wait-for"
+id      = "fetcher"
+timeout = "60s"
+
+[[step]]
+action = "assert"
+checks = [
+  "fetcher.size matches [0-9]+",
+]

.github/sims-patchbay/integration/intg-1to1-relay.toml

@@ -0,0 +1,41 @@
+[[extends]]
+file = "../iroh-defaults.toml"
+
+[sim]
+name     = "intg-1to1-relay"
+topology = "1to1"
+
+[[step]]
+use  = "relay-setup"
+vars = { device = "relay" }
+
+[[step]]
+use      = "transfer-provider"
+id       = "provider"
+device   = "provider"
+requires = ["relay.ready"]
+args     = ["--no-pkarr-publish", "--no-dns-resolve",
+            "--relay-url", "https://$NETSIM_IP_relay:3340"]
+
+[[step]]
+use    = "transfer-fetcher"
+id     = "fetcher"
+device = "fetcher"
+args   = ["${provider.endpoint_id}",
+          "--no-pkarr-publish", "--no-dns-resolve",
+          "--duration=20",
+          "--relay-url",        "https://$NETSIM_IP_relay:3340",
+          "--remote-relay-url", "https://$NETSIM_IP_relay:3340",
+          "--remote-direct-address", "${provider.direct_addr}"]
+
+[[step]]
+action  = "wait-for"
+id      = "fetcher"
+timeout = "60s"
+
+[[step]]
+action = "assert"
+checks = [
+  "fetcher.size matches [0-9]+",
+  "fetcher.conn_type contains Ip",
+]

.github/sims-patchbay/integration/intg-direct.toml

@@ -0,0 +1,38 @@
+# Integration test: single-provider direct transfer.
+
+[[extends]]
+file = "../iroh-defaults.toml"
+
+[matrix]
+topo = ["1to1", "1to3"]
+
+[sim]
+name     = "intg-${matrix.topo}-public"
+topology = "${matrix.topo}"
+
+[[step]]
+use    = "transfer-provider"
+id     = "provider"
+device = "provider"
+args   = ["--no-pkarr-publish", "--no-dns-resolve"]
+
+[[step]]
+use    = "transfer-fetcher"
+id     = "fetcher"
+device = "fetcher"
+args   = ["${provider.endpoint_id}",
+          "--no-pkarr-publish", "--no-dns-resolve",
+          "--duration=10",
+          "--remote-direct-address", "${provider.direct_addr}"]
+
+[[step]]
+action  = "wait-for"
+id      = "fetcher"
+timeout = "60s"
+
+[[step]]
+action = "assert"
+checks = [
+  "fetcher.size matches [0-9]+",
+  "fetcher.conn_type contains Ip",
+]

.github/sims-patchbay/integration/intg-multi-direct.toml

@@ -0,0 +1,31 @@
+# Integration test: multi-provider direct transfer.
+
+[[extends]]
+file = "../iroh-defaults.toml"
+
+[matrix]
+topo = ["2to2", "2to4"]
+
+[sim]
+name     = "intg-${matrix.topo}-public"
+topology = "${matrix.topo}"
+
+[[step]]
+use    = "transfer-provider"
+id     = "provider"
+device = "provider"
+args   = ["--no-pkarr-publish", "--no-dns-resolve"]
+
+[[step]]
+use    = "transfer-fetcher"
+id     = "fetcher"
+device = "fetcher"
+args   = ["${provider.endpoint_id}",
+          "--no-pkarr-publish", "--no-dns-resolve",
+          "--duration=10",
+          "--remote-direct-address", "${provider.direct_addr}"]
+
+[[step]]
+action  = "wait-for"
+id      = "fetcher"
+timeout = "60s"

.github/sims-patchbay/integration/intg-relay-dns-relay-only.toml

@@ -0,0 +1,50 @@
+# Integration test: relay-only transfer with full relay + DNS stack.
+# Ported from iroh_full.json 1_to_1ro case.
+
+[[extends]]
+file = "../iroh-defaults.toml"
+
+[sim]
+name     = "intg-1to1-relay-dns-relay-only"
+topology = "1to1"
+
+[[step]]
+use  = "relay-setup"
+vars = { device = "relay" }
+
+[[step]]
+use  = "dns-setup"
+vars = { device = "dns" }
+
+[[step]]
+use      = "transfer-provider"
+id       = "provider"
+device   = "provider"
+requires = ["relay.ready", "dns.ready"]
+args     = ["--relay-only",
+            "--relay-url", "https://$NETSIM_IP_relay:3340",
+            "--pkarr-relay-url", "http://$NETSIM_IP_dns:8080/pkarr",
+            "--dns-origin-domain", "$NETSIM_IP_dns:5300"]
+
+[[step]]
+use    = "transfer-fetcher"
+id     = "fetcher"
+device = "fetcher"
+args   = ["${provider.endpoint_id}",
+          "--relay-only",
+          "--size=1G",
+          "--relay-url",        "https://$NETSIM_IP_relay:3340",
+          "--remote-relay-url", "https://$NETSIM_IP_relay:3340",
+          "--pkarr-relay-url",  "http://$NETSIM_IP_dns:8080/pkarr",
+          "--dns-origin-domain", "$NETSIM_IP_dns:5300"]
+
+[[step]]
+action  = "wait-for"
+id      = "fetcher"
+timeout = "120s"
+
+[[step]]
+action = "assert"
+checks = [
+  "fetcher.size matches [0-9]+",
+]

.github/sims-patchbay/integration/intg-relay-dns.toml

@@ -0,0 +1,52 @@
+# Integration test: relay + DNS discovery.
+
+[[extends]]
+file = "../iroh-defaults.toml"
+
+[matrix]
+topo = ["1to1", "1to3"]
+
+[sim]
+name     = "intg-${matrix.topo}-relay-dns"
+topology = "${matrix.topo}"
+
+[[step]]
+use  = "relay-setup"
+vars = { device = "relay" }
+
+[[step]]
+use  = "dns-setup"
+vars = { device = "dns" }
+
+[[step]]
+use      = "transfer-provider"
+id       = "provider"
+device   = "provider"
+requires = ["relay.ready", "dns.ready"]
+args     = ["--relay-url", "https://$NETSIM_IP_relay:3340",
+            "--pkarr-relay-url", "http://$NETSIM_IP_dns:8080/pkarr",
+            "--dns-origin-domain", "$NETSIM_IP_dns:5300"]
+
+[[step]]
+use    = "transfer-fetcher"
+id     = "fetcher"
+device = "fetcher"
+args   = ["${provider.endpoint_id}",
+          "--size=1G",
+          "--relay-url",        "https://$NETSIM_IP_relay:3340",
+          "--remote-relay-url", "https://$NETSIM_IP_relay:3340",
+          "--pkarr-relay-url",  "http://$NETSIM_IP_dns:8080/pkarr",
+          "--dns-origin-domain", "$NETSIM_IP_dns:5300",
+          "--remote-direct-address", "${provider.direct_addr}"]
+
+[[step]]
+action  = "wait-for"
+id      = "fetcher"
+timeout = "60s"
+
+[[step]]
+action = "assert"
+checks = [
+  "fetcher.size matches [0-9]+",
+  "fetcher.conn_type contains Ip",
+]