From 692bfaa04e16bc538afeac1da61c88de1f1cbc22 Mon Sep 17 00:00:00 2001
From: Scott Lamb <slamb@slamb.org>
Date: Fri, 15 Jul 2022 16:12:26 -0700
Subject: [PATCH] WebRTC proxy example (#60)

This is a very basic version, as a starting point.
---
 Cargo.lock                        | 1597 ++++++++++++++++++++++++++++-
 Cargo.toml                        |    7 +-
 README.md                         |    9 +
 examples/client/src/main.rs       |    2 +-
 examples/webrtc-proxy/Cargo.toml  |   21 +
 examples/webrtc-proxy/src/main.rs |  335 ++++++
 6 files changed, 1959 insertions(+), 12 deletions(-)
 create mode 100644 examples/webrtc-proxy/Cargo.toml
 create mode 100644 examples/webrtc-proxy/src/main.rs

diff --git a/Cargo.lock b/Cargo.lock
index eeb0f41..e9a4443 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,105 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "aead"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fc95d1bdb8e6666b2b217308eeeb09f2d6728d104be3e31916cc74d15420331"
+dependencies = [
+ "generic-array",
+]
+
+[[package]]
+name = "aead"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b613b8e1e3cf911a086f53f03bf286f52fd7a7258e4fa606f0ef220d39d8877"
+dependencies = [
+ "generic-array",
+ "rand_core 0.6.3",
+]
+
+[[package]]
+name = "aes"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "884391ef1066acaa41e766ba8f596341b96e93ce34f9a43e7d24bf0a0eaf0561"
+dependencies = [
+ "aes-soft",
+ "aesni",
+ "cipher 0.2.5",
+]
+
+[[package]]
+name = "aes"
+version = "0.7.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e8b47f52ea9bae42228d07ec09eb676433d7c4ed1ebdf0f1d1c29ed446f1ab8"
+dependencies = [
+ "cfg-if",
+ "cipher 0.3.0",
+ "cpufeatures",
+ "opaque-debug",
+]
+
+[[package]]
+name = "aes-gcm"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5278b5fabbb9bd46e24aa69b2fdea62c99088e0a950a9be40e3e0101298f88da"
+dependencies = [
+ "aead 0.3.2",
+ "aes 0.6.0",
+ "cipher 0.2.5",
+ "ctr 0.6.0",
+ "ghash 0.3.1",
+ "subtle",
+]
+
+[[package]]
+name = "aes-gcm"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df5f85a83a7d8b0442b6aa7b504b8212c1733da07b98aae43d4bc21b2cb3cdf6"
+dependencies = [
+ "aead 0.4.3",
+ "aes 0.7.5",
+ "cipher 0.3.0",
+ "ctr 0.8.0",
+ "ghash 0.4.4",
+ "subtle",
+]
+
+[[package]]
+name = "aes-soft"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be14c7498ea50828a38d0e24a765ed2effe92a705885b57d029cd67d45744072"
+dependencies = [
+ "cipher 0.2.5",
+ "opaque-debug",
+]
+
+[[package]]
+name = "aesni"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea2e11f5e94c2f7d386164cc2aa1f97823fed6f259e486940a71c174dd01b0ce"
+dependencies = [
+ "cipher 0.2.5",
+ "opaque-debug",
+]
+
+[[package]]
+name = "aho-corasick"
+version = "0.7.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e37cfd5e7657ada45f742d6e99ca5788580b5c529dc78faf11ece6dc702656f"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "ansi_term"
 version = "0.12.1"
@@ -17,6 +116,29 @@ version = "1.0.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bb07d2053ccdbe10e2af2995a2f116c1330396493dc1269f6a91d0ae82e19704"
 
+[[package]]
+name = "arrayvec"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23b62fc65de8e4e7f52534fb52b0f3ed04746ae267519eef2a83941e8085068b"
+
+[[package]]
+name = "async-trait"
+version = "0.1.56"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96cf8829f67d2eab0b2dfa42c5d0ef737e0724e4a82b01b3e292456202b19716"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "atomic-waker"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "065374052e7df7ee4047b1160cca5e1467a12351a40b3da123c870ba0b8eda2a"
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -34,12 +156,33 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
+[[package]]
+name = "base16ct"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "349a06037c7bf932dd7e7d1f653678b2038b9ad46a74102f1fc7bd7872678cce"
+
 [[package]]
 name = "base64"
 version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
 
+[[package]]
+name = "base64ct"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3bdca834647821e0b13d9539a8634eb62d3501b6b6c2cec1722786ee6671b851"
+
+[[package]]
+name = "bincode"
+version = "1.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -55,6 +198,27 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "bitvec"
+version = "0.19.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55f93d0ef3363c364d5976646a38f04cf67cfe1d4c8d160cdea02cab2c116b33"
+dependencies = [
+ "funty",
+ "radium",
+ "tap",
+ "wyz",
+]
+
+[[package]]
+name = "block-buffer"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4152116fd6e9dadb291ae18fc1ec3575ed6d84c29642d97890f4b4a3417297e4"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "block-buffer"
 version = "0.10.2"
@@ -64,6 +228,22 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "block-modes"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57a0e8073e8baa88212fb5823574c02ebccb395136ba9a164ab89379ec6072f0"
+dependencies = [
+ "block-padding",
+ "cipher 0.2.5",
+]
+
+[[package]]
+name = "block-padding"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d696c370c750c948ada61c69a0ee2cbbb9c50b1019ddb86d9317157a99c2cae"
+
 [[package]]
 name = "bstr"
 version = "0.2.17"
@@ -82,6 +262,12 @@ version = "3.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37ccbd214614c6783386c1af30caf03192f17891059cecc394b4fb119e363de3"
 
+[[package]]
+name = "byteorder"
+version = "1.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
+
 [[package]]
 name = "bytes"
 version = "1.1.0"
@@ -103,6 +289,23 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
 
+[[package]]
+name = "cc"
+version = "1.0.73"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11"
+
+[[package]]
+name = "ccm"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5aca1a8fbc20b50ac9673ff014abfb2b5f4085ee1a850d408f14a159c5853ac7"
+dependencies = [
+ "aead 0.3.2",
+ "cipher 0.2.5",
+ "subtle",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -122,6 +325,24 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "cipher"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12f8e7987cbd042a63249497f41aed09f8e65add917ea6566effbc56578d6801"
+dependencies = [
+ "generic-array",
+]
+
+[[package]]
+name = "cipher"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ee52072ec15386f770805afd189a01c8841be8696bed250fa2f13c4c0d6dfb7"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "clap"
 version = "2.34.0"
@@ -131,7 +352,7 @@ dependencies = [
  "ansi_term",
  "atty",
  "bitflags",
- "strsim",
+ "strsim 0.8.0",
  "textwrap",
  "unicode-width",
  "vec_map",
@@ -153,6 +374,23 @@ dependencies = [
  "url",
 ]
 
+[[package]]
+name = "clipboard-win"
+version = "4.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2f3e1238132dc01f081e1cbb9dace14e5ef4c3a51ee244bd982275fb514605db"
+dependencies = [
+ "error-code",
+ "str-buf",
+ "winapi",
+]
+
+[[package]]
+name = "const-oid"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e4c78c047431fee22c1a7bb92e00ad095a02a983affe4d8a72e2a2c62c1b94f3"
+
 [[package]]
 name = "cookie-factory"
 version = "0.3.2"
@@ -168,6 +406,27 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "cpuid-bool"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dcb25d077389e53838a8158c8e99174c5a9d902dee4904320db714f3c653ffba"
+
+[[package]]
+name = "crc"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49fc9a695bca7f35f5f4c15cddc84415f66a74ea78eef08e90c5024f2b540e23"
+dependencies = [
+ "crc-catalog",
+]
+
+[[package]]
+name = "crc-catalog"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ccaeedb56da03b09f598226e25e80088cb4cd25f316e6e4df7d695f0feeb1403"
+
 [[package]]
 name = "criterion"
 version = "0.3.6"
@@ -251,6 +510,18 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "crypto-bigint"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "03c6a1d5fa1de37e071642dfa44ec552ca5b299adb128fab16138e24b548fd21"
+dependencies = [
+ "generic-array",
+ "rand_core 0.6.3",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "crypto-common"
 version = "0.1.5"
@@ -261,6 +532,26 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "crypto-mac"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bff07008ec701e8028e2ceb8f83f0e4274ee62bd2dbdc4fefff2e9a91824081a"
+dependencies = [
+ "generic-array",
+ "subtle",
+]
+
+[[package]]
+name = "crypto-mac"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b1d1a86f49236c215f271d40892d5fc950490551400b02ef360692c29815c714"
+dependencies = [
+ "generic-array",
+ "subtle",
+]
+
 [[package]]
 name = "csv"
 version = "1.1.6"
@@ -283,28 +574,303 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "ctr"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb4a30d54f7443bf3d6191dcd486aca19e67cb3c49fa7a06a319966346707e7f"
+dependencies = [
+ "cipher 0.2.5",
+]
+
+[[package]]
+name = "ctr"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "049bb91fb4aaf0e3c7efa6cd5ef877dbbbd15b39dad06d9948de4ec8a75761ea"
+dependencies = [
+ "cipher 0.3.0",
+]
+
+[[package]]
+name = "curve25519-dalek"
+version = "3.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90f9d052967f590a76e62eb387bd0bbb1b000182c3cefe5364db6b7211651bc0"
+dependencies = [
+ "byteorder",
+ "digest 0.9.0",
+ "rand_core 0.5.1",
+ "subtle",
+ "zeroize",
+]
+
+[[package]]
+name = "darling"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f2c43f534ea4b0b049015d00269734195e6d3f0f6635cb692251aca6f9f8b3c"
+dependencies = [
+ "darling_core",
+ "darling_macro",
+]
+
+[[package]]
+name = "darling_core"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e91455b86830a1c21799d94524df0845183fa55bafd9aa137b01c7d1065fa36"
+dependencies = [
+ "fnv",
+ "ident_case",
+ "proc-macro2",
+ "quote",
+ "strsim 0.10.0",
+ "syn",
+]
+
+[[package]]
+name = "darling_macro"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29b5acf0dea37a7f66f7b25d2c5e93fd46f8f6968b1a5d7a3e02e97768afc95a"
+dependencies = [
+ "darling_core",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "data-encoding"
+version = "2.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ee2393c4a91429dffb4bedf19f4d6abf27d8a732c8ce4980305d782e5426d57"
+
+[[package]]
+name = "der"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6919815d73839e7ad218de758883aae3a257ba6759ce7a9992501efbb53d705c"
+dependencies = [
+ "const-oid",
+]
+
+[[package]]
+name = "der-oid-macro"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4cccf60bb98c0fca115a581f894aed0e43fa55bf289fdac5599bec440bb4fd6"
+dependencies = [
+ "nom 6.1.2",
+ "num-bigint",
+ "num-traits",
+ "syn",
+]
+
+[[package]]
+name = "der-oid-macro"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c73af209b6a5dc8ca7cbaba720732304792cddc933cfea3d74509c2b1ef2f436"
+dependencies = [
+ "num-bigint",
+ "num-traits",
+ "syn",
+]
+
+[[package]]
+name = "der-parser"
+version = "5.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d7ededb7525bb4114bc209685ce7894edc2965f4914312a1ea578a645a237f0"
+dependencies = [
+ "der-oid-macro 0.4.0",
+ "nom 6.1.2",
+ "num-bigint",
+ "num-traits",
+ "rusticata-macros 3.2.0",
+]
+
+[[package]]
+name = "der-parser"
+version = "6.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4cddf120f700b411b2b02ebeb7f04dc0b7c8835909a6c2f52bf72ed0dd3433b2"
+dependencies = [
+ "der-oid-macro 0.5.0",
+ "nom 7.1.1",
+ "num-bigint",
+ "num-traits",
+ "rusticata-macros 4.1.0",
+]
+
+[[package]]
+name = "derive_builder"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d13202debe11181040ae9063d739fa32cfcaaebe2275fe387703460ae2365b30"
+dependencies = [
+ "derive_builder_macro",
+]
+
+[[package]]
+name = "derive_builder_core"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "66e616858f6187ed828df7c64a6d71720d83767a7f19740b2d1b6fe6327b36e5"
+dependencies = [
+ "darling",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "derive_builder_macro"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58a94ace95092c5acb1e97a7e846b310cfbd499652f72297da7493f618a98d73"
+dependencies = [
+ "derive_builder_core",
+ "syn",
+]
+
+[[package]]
+name = "digest"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3dd60d1080a57a05ab032377049e0591415d2b31afd7028356dbf3cc6dcb066"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "digest"
 version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2fb860ca6fafa5552fb6d0e816a69c8e49f0908bf524e30a90d97c85892d506"
 dependencies = [
- "block-buffer",
+ "block-buffer 0.10.2",
  "crypto-common",
 ]
 
+[[package]]
+name = "displaydoc"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3bf95dc3f046b9da4f2d51833c0d3547d8564ef6910f5c1ed130306a75b92886"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "ecdsa"
+version = "0.13.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d0d69ae62e0ce582d56380743515fefaf1a8c70cec685d9677636d7e30ae9dc9"
+dependencies = [
+ "der",
+ "elliptic-curve",
+ "rfc6979",
+ "signature",
+]
+
 [[package]]
 name = "either"
 version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f107b87b6afc2a64fd13cac55fe06d6c8859f12d4b14cbcdd2c67d0976781be"
 
+[[package]]
+name = "elliptic-curve"
+version = "0.11.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25b477563c2bfed38a3b7a60964c49e058b2510ad3f12ba3483fd8f62c2306d6"
+dependencies = [
+ "base16ct",
+ "crypto-bigint",
+ "der",
+ "ff",
+ "generic-array",
+ "group",
+ "rand_core 0.6.3",
+ "sec1",
+ "subtle",
+ "zeroize",
+]
+
+[[package]]
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+
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+checksum = "f639046355ee4f37944e44f60642c6f3a7efa3cf6b78c78a0d989a8ce6c396a1"
+dependencies = [
+ "errno-dragonfly",
+ "libc",
+ "winapi",
+]
+
+[[package]]
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+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa68f1b12764fab894d2755d2518754e71b4fd80ecfb822714a1206c2aab39bf"
+dependencies = [
+ "cc",
+ "libc",
+]
+
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+checksum = "64f18991e7bf11e7ffee451b5318b5c1a73c52d0d0ada6e5a3017c8c1ced6a21"
+dependencies = [
+ "libc",
+ "str-buf",
+]
+
 [[package]]
 name = "fallible-iterator"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4443176a9f2c162692bd3d352d745ef9413eec5782a80d8fd6f8a1ac692a07f7"
 
+[[package]]
+name = "fd-lock"
+version = "3.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e11dcc7e4d79a8c89b9ab4c6f5c30b1fc4a83c420792da3542fd31179ed5f517"
+dependencies = [
+ "cfg-if",
+ "rustix",
+ "windows-sys",
+]
+
+[[package]]
+name = "ff"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "131655483be284720a17d74ff97592b8e76576dc25563148601df2d7c9080924"
+dependencies = [
+ "rand_core 0.6.3",
+ "subtle",
+]
+
+[[package]]
+name = "fnv"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
 [[package]]
 name = "form_urlencoded"
 version = "1.0.1"
@@ -321,6 +887,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3958af68a31b1d1384d3f39b6aa33eb14b6009065b5ca305ddd9712a4237124f"
 
+[[package]]
+name = "funty"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fed34cd105917e91daa4da6b3728c47b068749d6a62c59811f06ed2ac71d9da7"
+
 [[package]]
 name = "futures"
 version = "0.3.21"
@@ -420,6 +992,17 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "getrandom"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8fc3cb4d91f53b50155bdcfd23f6a4c39ae1969c2ae85982b135750cccaf5fce"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi 0.9.0+wasi-snapshot-preview1",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.7"
@@ -431,6 +1014,37 @@ dependencies = [
  "wasi 0.11.0+wasi-snapshot-preview1",
 ]
 
+[[package]]
+name = "ghash"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97304e4cd182c3846f7575ced3890c53012ce534ad9114046b0a9e00bb30a375"
+dependencies = [
+ "opaque-debug",
+ "polyval 0.4.5",
+]
+
+[[package]]
+name = "ghash"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1583cc1656d7839fd3732b80cf4f38850336cdb9b8ded1cd399ca62958de3c99"
+dependencies = [
+ "opaque-debug",
+ "polyval 0.5.3",
+]
+
+[[package]]
+name = "group"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc5ac374b108929de78460075f3dc439fa66df9d8fc77e8f12caa5165fcf0c89"
+dependencies = [
+ "ff",
+ "rand_core 0.6.3",
+ "subtle",
+]
+
 [[package]]
 name = "h264-reader"
 version = "0.5.0"
@@ -473,6 +1087,26 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
+[[package]]
+name = "hmac"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1441c6b1e930e2817404b5046f1f989899143a12bf92de603b69f4e0aee1e15"
+dependencies = [
+ "crypto-mac 0.10.1",
+ "digest 0.9.0",
+]
+
+[[package]]
+name = "hmac"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a2a2320eb7ec0ebe8da8f744d7812d9fc4cb4d09344ac01898dbcb6a20ae69b"
+dependencies = [
+ "crypto-mac 0.11.1",
+ "digest 0.9.0",
+]
+
 [[package]]
 name = "http-auth"
 version = "0.1.6"
@@ -480,14 +1114,20 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c0b40b39d66c28829a0cf4d09f7e139ff8201f7500a5083732848ed3b4b4d850"
 dependencies = [
  "base64",
- "digest",
+ "digest 0.10.3",
  "hex",
  "md-5",
  "memchr",
  "rand",
- "sha2",
+ "sha2 0.10.2",
 ]
 
+[[package]]
+name = "ident_case"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
+
 [[package]]
 name = "idna"
 version = "0.2.3"
@@ -499,6 +1139,37 @@ dependencies = [
  "unicode-normalization",
 ]
 
+[[package]]
+name = "interceptor"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f9c57d39048948d61191cdbe2d3900560cbe0adc626fa51677fe1fb43ddfc8a"
+dependencies = [
+ "async-trait",
+ "bytes",
+ "log",
+ "rand",
+ "rtcp",
+ "rtp",
+ "thiserror",
+ "tokio",
+ "waitgroup",
+ "webrtc-srtp",
+ "webrtc-util",
+]
+
+[[package]]
+name = "io-lifetimes"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24c3f4eff5495aee4c0399d7b6a0dc2b6e81be84242ffbfcf253ebacccc1d0cb"
+
+[[package]]
+name = "ipnet"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "879d54834c8c76457ef4293a689b2a8c59b076067ad77b15efafbb05f92a592b"
+
 [[package]]
 name = "itertools"
 version = "0.10.3"
@@ -535,12 +1206,41 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
+[[package]]
+name = "lexical-core"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6607c62aa161d23d17a9072cc5da0be67cdfc89d3afb1e8d9c842bebc2525ffe"
+dependencies = [
+ "arrayvec",
+ "bitflags",
+ "cfg-if",
+ "ryu",
+ "static_assertions",
+]
+
 [[package]]
 name = "libc"
 version = "0.2.126"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.0.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d4d2456c373231a208ad294c33dc5bff30051eafd954cd4caae83a712b12854d"
+
+[[package]]
+name = "lock_api"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "327fa5b6a6940e4699ec49a9beae1ea4845c6bab9314e4f84ac68742139d8c53"
+dependencies = [
+ "autocfg",
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.4.17"
@@ -562,7 +1262,7 @@ version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "658646b21e0b72f7866c7038ab086d3d5e1cd6271f060fd37defb241949d0582"
 dependencies = [
- "digest",
+ "digest 0.10.3",
 ]
 
 [[package]]
@@ -623,6 +1323,53 @@ dependencies = [
  "log",
 ]
 
+[[package]]
+name = "nibble_vec"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77a5d83df9f36fe23f0c3648c6bbb8b0298bb5f1939c8f2704431371f4b84d43"
+dependencies = [
+ "smallvec",
+]
+
+[[package]]
+name = "nix"
+version = "0.23.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f866317acbd3a240710c63f065ffb1e4fd466259045ccb504130b7f668f35c6"
+dependencies = [
+ "bitflags",
+ "cc",
+ "cfg-if",
+ "libc",
+ "memoffset",
+]
+
+[[package]]
+name = "nix"
+version = "0.24.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f17df307904acd05aa8e32e97bb20f2a0df1728bbc2d771ae8f9a90463441e9"
+dependencies = [
+ "bitflags",
+ "cfg-if",
+ "libc",
+ "memoffset",
+]
+
+[[package]]
+name = "nom"
+version = "6.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7413f999671bd4745a7b624bd370a569fb6bc574b23c83a3c5ed2e453f3d5e2"
+dependencies = [
+ "bitvec",
+ "funty",
+ "lexical-core",
+ "memchr",
+ "version_check",
+]
+
 [[package]]
 name = "nom"
 version = "7.1.1"
@@ -633,6 +1380,17 @@ dependencies = [
  "minimal-lexical",
 ]
 
+[[package]]
+name = "num-bigint"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f93ab6289c7b344a8a9f60f88d80aa20032336fe78da341afc91c8a2341fc75f"
+dependencies = [
+ "autocfg",
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-integer"
 version = "0.1.45"
@@ -662,6 +1420,24 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "oid-registry"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6aae73e474f83beacd8ae2179e328e03d63d9223949d97e1b7c108059a34715"
+dependencies = [
+ "der-parser 5.1.2",
+]
+
+[[package]]
+name = "oid-registry"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fe554cb2393bc784fd678c82c84cc0599c31ceadc7f03a594911f822cb8d1815"
+dependencies = [
+ "der-parser 6.0.1",
+]
+
 [[package]]
 name = "once_cell"
 version = "1.13.0"
@@ -674,6 +1450,56 @@ version = "11.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"
 
+[[package]]
+name = "opaque-debug"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
+
+[[package]]
+name = "p256"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "19736d80675fbe9fe33426268150b951a3fb8f5cfca2a23a17c85ef3adb24e3b"
+dependencies = [
+ "ecdsa",
+ "elliptic-curve",
+ "sec1",
+ "sha2 0.9.9",
+]
+
+[[package]]
+name = "parking_lot"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
+dependencies = [
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
+name = "parking_lot_core"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09a279cbf25cb0757810394fbc1e359949b59e348145c643a939a525692e6929"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "windows-sys",
+]
+
+[[package]]
+name = "pem"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "03c64931a1a212348ec4f3b4362585eca7159d0d09cbdf4a7f74f02173596fd4"
+dependencies = [
+ "base64",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.1.0"
@@ -712,6 +1538,17 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "pkcs8"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7cabda3fb821068a9a4fab19a683eac3af12edf0f34b94a8be53c4972b8149d0"
+dependencies = [
+ "der",
+ "spki",
+ "zeroize",
+]
+
 [[package]]
 name = "plotters"
 version = "0.3.2"
@@ -740,6 +1577,29 @@ dependencies = [
  "plotters-backend",
 ]
 
+[[package]]
+name = "polyval"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eebcc4aa140b9abd2bc40d9c3f7ccec842679cd79045ac3a7ac698c1a064b7cd"
+dependencies = [
+ "cpuid-bool",
+ "opaque-debug",
+ "universal-hash",
+]
+
+[[package]]
+name = "polyval"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8419d2b623c7c0896ff2d5d96e2cb4ede590fed28fcc34934f4c33c036e620a1"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "opaque-debug",
+ "universal-hash",
+]
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.16"
@@ -794,6 +1654,22 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "radium"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "941ba9d78d8e2f7ce474c015eea4d9c6d25b6a3327f9832ee29a4de27f91bbb8"
+
+[[package]]
+name = "radix_trie"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c069c179fcdc6a2fe24d8d18305cf085fdbd4f922c041943e203685d6a1c58fd"
+dependencies = [
+ "endian-type",
+ "nibble_vec",
+]
+
 [[package]]
 name = "rand"
 version = "0.8.5"
@@ -802,7 +1678,7 @@ checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
 dependencies = [
  "libc",
  "rand_chacha",
- "rand_core",
+ "rand_core 0.6.3",
 ]
 
 [[package]]
@@ -812,7 +1688,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
 dependencies = [
  "ppv-lite86",
- "rand_core",
+ "rand_core 0.6.3",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
+dependencies = [
+ "getrandom 0.1.16",
 ]
 
 [[package]]
@@ -821,7 +1706,7 @@ version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d34f1408f55294453790c48b2f1ebbb1c5b4b7563eb1f418bcfcfdbb06ebb4e7"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.7",
 ]
 
 [[package]]
@@ -848,12 +1733,36 @@ dependencies = [
  "num_cpus",
 ]
 
+[[package]]
+name = "rcgen"
+version = "0.8.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5911d1403f4143c9d56a702069d593e8d0f3fab880a85e103604d0893ea31ba7"
+dependencies = [
+ "chrono",
+ "pem",
+ "ring",
+ "x509-parser 0.12.0",
+ "yasna",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.2.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62f25bc4c7e55e0b0b7a1d43fb893f4fa1361d0abe38b9ce4f323c2adfe6ef42"
+dependencies = [
+ "bitflags",
+]
+
 [[package]]
 name = "regex"
 version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4c4eb3267174b8c6c2f654116623910a0fef09c4753f8dd83db29c48a0df988b"
 dependencies = [
+ "aho-corasick",
+ "memchr",
  "regex-syntax",
 ]
 
@@ -908,6 +1817,55 @@ dependencies = [
  "mpeg4-audio-const",
 ]
 
+[[package]]
+name = "rfc6979"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96ef608575f6392792f9ecf7890c00086591d29a83910939d430753f7c050525"
+dependencies = [
+ "crypto-bigint",
+ "hmac 0.11.0",
+ "zeroize",
+]
+
+[[package]]
+name = "ring"
+version = "0.16.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3053cf52e236a3ed746dfc745aa9cacf1b791d846bdaf412f60a8d7d6e17c8fc"
+dependencies = [
+ "cc",
+ "libc",
+ "once_cell",
+ "spin",
+ "untrusted",
+ "web-sys",
+ "winapi",
+]
+
+[[package]]
+name = "rtcp"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80d9625e47edb43aca711ec826ad12154d364ada9e60f4e6f8d40471b3e1e156"
+dependencies = [
+ "bytes",
+ "thiserror",
+ "webrtc-util",
+]
+
+[[package]]
+name = "rtp"
+version = "0.6.5"
+dependencies = [
+ "async-trait",
+ "bytes",
+ "log",
+ "rand",
+ "thiserror",
+ "webrtc-util",
+]
+
 [[package]]
 name = "rtsp-types"
 version = "0.0.3"
@@ -915,7 +1873,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7b668122d4d00c479c08fb2a0a253669832606ccca80832a6b99bb5288ab4f75"
 dependencies = [
  "cookie-factory",
- "nom",
+ "nom 7.1.1",
  "tinyvec",
  "url",
 ]
@@ -929,6 +1887,80 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rusticata-macros"
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+ "bitflags",
+ "cfg-if",
+ "clipboard-win",
+ "fd-lock",
+ "libc",
+ "log",
+ "memchr",
+ "nix 0.23.1",
+ "radix_trie",
+ "scopeguard",
+ "smallvec",
+ "unicode-segmentation",
+ "unicode-width",
+ "utf8parse",
+ "winapi",
+]
+
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+dependencies = [
+ "ring",
+ "untrusted",
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+dependencies = [
+ "rand",
+ "substring",
+ "thiserror",
+ "url",
+]
+
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@@ -960,6 +2014,19 @@ dependencies = [
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+[[package]]
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+ "generic-array",
+ "pkcs8",
+ "subtle",
+ "zeroize",
+]
+
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+dependencies = [
+ "serde_derive",
+]
 
 [[package]]
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@@ -1004,6 +2074,32 @@ dependencies = [
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+ "cfg-if",
+ "cpufeatures",
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+]
+
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+dependencies = [
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+ "cfg-if",
+ "cpufeatures",
+ "digest 0.9.0",
+ "opaque-debug",
+]
+
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@@ -1012,7 +2108,7 @@ checksum = "55deaec60f81eefe3cce0dc50bda92d6d8e88f2a27df7c5033b42afeb1ed2676"
 dependencies = [
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  "cpufeatures",
- "digest",
+ "digest 0.10.3",
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 [[package]]
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+dependencies = [
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+ "rand_core 0.6.3",
+]
+
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+
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+ "crc",
+ "lazy_static",
+ "md-5",
+ "rand",
+ "ring",
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+ "url",
+ "webrtc-util",
+]
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+
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@@ -1087,6 +2261,24 @@ dependencies = [
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+[[package]]
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+ "quote",
+ "syn",
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+
 [[package]]
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 version = "0.11.0"
@@ -1164,6 +2356,7 @@ dependencies = [
  "mio",
  "num_cpus",
  "once_cell",
+ "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",
  "socket2",
@@ -1216,6 +2409,24 @@ dependencies = [
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+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+dependencies = [
+ "async-trait",
+ "base64",
+ "log",
+ "md-5",
+ "rand",
+ "ring",
+ "stun",
+ "thiserror",
+ "tokio",
+ "webrtc-util",
+]
+
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 checksum = "3ed742d4ea2bd1176e236172c8429aaf54486e7ac098db29ffe6529e0ce50973"
 
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+
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+dependencies = [
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+ "subtle",
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+
 [[package]]
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@@ -1267,6 +2500,21 @@ dependencies = [
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+[[package]]
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+checksum = "936e4b492acfd135421d8dca4b1aa80a7bfc26e702ef3af710e0752684df5372"
+
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+dependencies = [
+ "getrandom 0.2.7",
+]
+
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+dependencies = [
+ "atomic-waker",
+]
+
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@@ -1290,6 +2547,12 @@ dependencies = [
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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@@ -1366,6 +2629,237 @@ dependencies = [
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+ "rcgen",
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+ "ring",
+ "rtcp",
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+ "rustls",
+ "sdp",
+ "serde",
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+ "tokio",
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+ "url",
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+ "webrtc-data",
+ "webrtc-dtls",
+ "webrtc-ice",
+ "webrtc-mdns",
+ "webrtc-media",
+ "webrtc-sctp",
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+ "lazy_static",
+ "nom 7.1.1",
+ "oid-registry 0.2.0",
+ "ring",
+ "rusticata-macros 4.1.0",
+ "thiserror",
+]
+
+[[package]]
+name = "yasna"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e262a29d0e61ccf2b6190d7050d4b237535fc76ce4c1210d9caa316f71dffa75"
+dependencies = [
+ "chrono",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4756f7db3f7b5574938c3eb1c117038b8e07f95ee6718c0efad4ac21508f1efd"
+dependencies = [
+ "zeroize_derive",
+]
+
+[[package]]
+name = "zeroize_derive"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f8f187641dad4f680d25c4bfc4225b418165984179f26ca76ec4fb6441d3a17"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
diff --git a/Cargo.toml b/Cargo.toml
index ca88b9f..dd1e419 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 [workspace]
-members = [".", "examples/client"]
+members = [".", "examples/client", "examples/webrtc-proxy"]
 default-members = ["."]
 
 [package]
@@ -45,6 +45,11 @@ tokio = { version = "1.5.0", features = ["io-util", "macros", "rt-multi-thread",
 [profile.bench]
 debug = true
 
+[patch.crates-io]
+rtp = { path = " ../../../crates/webrtc-rs/webrtc/crates/rtp" }
+webrtc = { path = " ../../../crates/webrtc-rs/webrtc" }
+webrtc-srtp = { path = " ../../../crates/webrtc-rs/webrtc/crates/srtp" }
+
 [[bench]]
 name = "client"
 harness = false
diff --git a/README.md b/README.md
index bcdae1d..db223e2 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,15 @@ Where CMD:
 * **mp4** - Writes RTSP streams to mp4 file; exit with Ctrl+C.
 * **onvif** - Gets realtime onvif metadata if available; exit with Ctrl+C.
 
+## Example WebRTC proxy
+
+This allows viewing a H.264 video stream from your browser, with the help of
+[`webrtc-rs`](https://crates.io/crates/webrtc).
+
+```shell
+$ cargo run --package webrtc-proxy -- --help
+```
+
 ## Acknowledgements
 
 This builds on the whole Rust ecosystem. A couple folks have been especially
diff --git a/examples/client/src/main.rs b/examples/client/src/main.rs
index 4c658f4..f0c9639 100644
--- a/examples/client/src/main.rs
+++ b/examples/client/src/main.rs
@@ -8,7 +8,7 @@ mod mp4;
 mod onvif;
 
 use anyhow::Error;
-use log::{error, info};
+use log::error;
 use std::str::FromStr;
 use structopt::StructOpt;
 
diff --git a/examples/webrtc-proxy/Cargo.toml b/examples/webrtc-proxy/Cargo.toml
new file mode 100644
index 0000000..db29849
--- /dev/null
+++ b/examples/webrtc-proxy/Cargo.toml
@@ -0,0 +1,21 @@
+[package]
+name = "webrtc-proxy"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+anyhow = "1.0.41"
+base64 = "0.13.0"
+futures = "0.3.14"
+log = "0.4.8"
+mylog = { git = "https://github.com/scottlamb/mylog" }
+retina = { path = "../../" }
+rustyline = { version = "9.1.2", default-features = false }
+serde = "1.0.139"
+serde_json = "1.0.82"
+structopt = "0.3.21"
+tokio = { version = "1.5.0", features = ["macros", "rt-multi-thread", "signal"] }
+url = "2.2.1"
+webrtc = "0.4.0"
diff --git a/examples/webrtc-proxy/src/main.rs b/examples/webrtc-proxy/src/main.rs
new file mode 100644
index 0000000..fc55edd
--- /dev/null
+++ b/examples/webrtc-proxy/src/main.rs
@@ -0,0 +1,335 @@
+// Copyright (C) 2022 Scott Lamb <slamb@slamb.org>
+// SPDX-License-Identifier: MIT OR Apache-2.0
+
+use anyhow::{anyhow, bail, Error};
+use futures::StreamExt;
+use log::{error, info};
+use retina::{
+    client::SetupOptions,
+    codec::{CodecItem, VideoFrame},
+};
+use std::{str::FromStr, sync::Arc};
+use structopt::StructOpt;
+use webrtc::{
+    api::{interceptor_registry::register_default_interceptors, APIBuilder},
+    ice_transport::{ice_connection_state::RTCIceConnectionState, ice_server::RTCIceServer},
+    interceptor::registry::Registry,
+    media::Sample,
+    peer_connection::{
+        configuration::RTCConfiguration, peer_connection_state::RTCPeerConnectionState,
+        sdp::session_description::RTCSessionDescription,
+    },
+    rtp_transceiver::rtp_codec::RTCRtpCodecCapability,
+    track::track_local::{track_local_static_sample::TrackLocalStaticSample, TrackLocal},
+};
+
+/// Proxies from the given RTSP server to a WebRTC client.
+///
+/// This currently uses a jsfiddle borrowed from
+/// [webrtc-rs](https://github.com/webrtc-rs/webrtc)'s examples which expects
+/// you to help out the negotiation by pasting the browser's offer (as a long
+/// base64 string) to the CLI, then the CLI's answer back in the same manner. It
+/// also only supports a single client.
+///
+/// A future version might embed a webserver so you can just go to the supplied
+/// URL and have everything work.
+#[derive(StructOpt)]
+struct Opts {
+    /// `rtsp://` URL to connect to.
+    #[structopt(long, parse(try_from_str))]
+    url: url::Url,
+
+    /// Username to send if the server requires authentication.
+    #[structopt(long)]
+    username: Option<String>,
+
+    /// Password; requires username.
+    #[structopt(long, requires = "username")]
+    password: Option<String>,
+
+    /// When to issue a `TEARDOWN` request: `auto`, `always`, or `never`.
+    #[structopt(default_value, long)]
+    teardown: retina::client::TeardownPolicy,
+
+    /// The transport to use: `tcp` or `udp` (experimental).
+    #[structopt(default_value, long)]
+    transport: retina::client::Transport,
+}
+
+fn init_logging() -> mylog::Handle {
+    let h = mylog::Builder::new()
+        .set_format(
+            ::std::env::var("MOONFIRE_FORMAT")
+                .map_err(|_| ())
+                .and_then(|s| mylog::Format::from_str(&s))
+                .unwrap_or(mylog::Format::Google),
+        )
+        .set_spec(::std::env::var("MOONFIRE_LOG").as_deref().unwrap_or("info"))
+        .build();
+    h.clone().install().unwrap();
+    h
+}
+
+#[tokio::main]
+async fn main() {
+    let mut h = init_logging();
+    if let Err(e) = {
+        let _a = h.async_scope();
+        run().await
+    } {
+        error!("{}", e);
+        std::process::exit(1);
+    }
+}
+
+fn read_offer() -> Result<RTCSessionDescription, Error> {
+    // Avoid <https://github.com/webrtc-rs/examples/issues/16> by using rustyline
+    // to take the terminal out of canonical mode.
+    let mut rl = rustyline::Editor::<()>::new();
+    let line = rl.readline(">> ")?;
+    let line = line.trim();
+    let raw = base64::decode(line)?;
+    Ok(serde_json::from_slice(&raw)?)
+}
+
+async fn run() -> Result<(), Error> {
+    let opts = Opts::from_args();
+    let creds = match (opts.username, opts.password) {
+        (Some(username), password) => Some(retina::client::Credentials {
+            username,
+            password: password.unwrap_or_default(),
+        }),
+        (None, None) => None,
+        _ => unreachable!(), // structopt/clap enforce that password requires username.
+    };
+    let stop_signal = tokio::signal::ctrl_c();
+    tokio::pin!(stop_signal);
+    let upstream_session_group = Arc::new(retina::client::SessionGroup::default());
+    let mut upstream_session = retina::client::Session::describe(
+        opts.url.clone(),
+        retina::client::SessionOptions::default()
+            .creds(creds)
+            .session_group(upstream_session_group.clone())
+            .user_agent("Retina webrtc-proxy example".to_owned())
+            .teardown(opts.teardown),
+    )
+    .await?;
+
+    let mut m = webrtc::api::media_engine::MediaEngine::default();
+    m.register_default_codecs()?;
+
+    // Create a InterceptorRegistry. This is the user configurable RTP/RTCP Pipeline.
+    // This provides NACKs, RTCP Reports and other features. If you use `webrtc.NewPeerConnection`
+    // this is enabled by default. If you are manually managing You MUST create a InterceptorRegistry
+    // for each PeerConnection.
+    let mut registry = Registry::new();
+
+    // Use the default set of Interceptors
+    registry = register_default_interceptors(registry, &mut m)?;
+
+    // Create the API object with the MediaEngine
+    let api = APIBuilder::new()
+        .with_media_engine(m)
+        .with_interceptor_registry(registry)
+        .build();
+
+    // Prepare the configuration
+    let downstream_cfg = RTCConfiguration {
+        ice_servers: vec![RTCIceServer {
+            urls: vec!["stun:stun.l.google.com:19302".to_owned()],
+            ..Default::default()
+        }],
+        ..Default::default()
+    };
+
+    let downstream_conn = Arc::new(api.new_peer_connection(downstream_cfg).await?);
+    let mut tracks = Vec::new();
+
+    // Prepare outbound state for each track of interest.
+    for (i, stream) in upstream_session.streams().iter().enumerate() {
+        if stream.media() != "video" && stream.encoding_name() != "h264" {
+            // Currently we only support H.264 video.
+            continue;
+        }
+
+        // This could work in a few different ways:
+        //
+        // 1. Pass RTP packets from upstream to downstream unmodified. (From
+        //    retina::client::Session's Stream impl to
+        //    webrtc::track::track_local::track_local_static_rtp::TrackLocalStaticRtp.)
+        //    This only works if the upstream and downstream agree on an
+        //    acceptable MTU.
+        // 2. Pass whole frames (aka samples or H.264 access units). (From
+        //    retina::client::Demuxed's Stream impl to
+        //    webrtc::track::track_local::track_local_static_sample::TrackLocalStaticSample.)
+        //    This introduces a slight lag if it takes a long time to receive a
+        //    complete frame from upstream.
+        // 3. Repacketize on-the-fly, buffering upstream packets and flushing
+        //    every downstream MTU, buffering at most
+        //    max(upstream MTU, downstream MTU) bytes.
+        //
+        // #3 seems ideal but is not yet implemented. The current approach is #2.
+        let track = Arc::new(TrackLocalStaticSample::new(
+            RTCRtpCodecCapability {
+                mime_type: "video/h264".to_owned(),
+                ..Default::default()
+            },
+            format!("{}-video", i),
+            "retina-webrtc-proxy".to_owned(),
+        ));
+        let sender = downstream_conn
+            .add_track(Arc::clone(&track) as Arc<dyn TrackLocal + Send + Sync>)
+            .await?;
+
+        // Read incoming RTCP packets
+        // Before these packets are returned they are processed by interceptors. For things
+        // like NACK this needs to be called.
+        tokio::spawn(async move {
+            let mut rtcp_buf = vec![0u8; 1500];
+            while let Ok((_, _)) = sender.read(&mut rtcp_buf).await {}
+        });
+
+        if tracks.len() <= i {
+            tracks.resize(i + 1, None);
+        }
+        tracks[i] = Some(track);
+    }
+
+    // Set up the streams on the inbound side.
+    for i in tracks
+        .iter()
+        .enumerate()
+        .filter_map(|(i, track)| track.as_ref().map(|_| i))
+    {
+        upstream_session
+            .setup(i, SetupOptions::default().transport(opts.transport.clone()))
+            .await?;
+    }
+
+    let mut upstream_session = upstream_session
+        .play(retina::client::PlayOptions::default().ignore_zero_seq(true))
+        .await?
+        .demuxed()?;
+
+    // Set the handler for ICE connection state
+    // This will notify you when the peer has connected/disconnected
+    let (ice_conn_state_tx, ice_conn_state_rx) = tokio::sync::mpsc::unbounded_channel();
+    downstream_conn
+        .on_ice_connection_state_change(Box::new(move |state: RTCIceConnectionState| {
+            ice_conn_state_tx.send(state).unwrap();
+            Box::pin(async {})
+        }))
+        .await;
+    tokio::pin!(ice_conn_state_rx);
+    let (peer_conn_state_tx, peer_conn_state_rx) = tokio::sync::mpsc::unbounded_channel();
+    downstream_conn
+        .on_peer_connection_state_change(Box::new(move |state: RTCPeerConnectionState| {
+            peer_conn_state_tx.send(state).unwrap();
+            Box::pin(async {})
+        }))
+        .await;
+    tokio::pin!(peer_conn_state_rx);
+
+    println!("Navigate to https://jsfiddle.net/9s10amwL/ in your browser.");
+    println!("Paste from the 'Browser base64 Session description' box to here:");
+    let offer = read_offer()?;
+    println!();
+    downstream_conn.set_remote_description(offer).await?;
+    let answer = downstream_conn.create_answer(None).await?;
+    downstream_conn.set_local_description(answer).await?;
+    downstream_conn
+        .gathering_complete_promise()
+        .await
+        .recv()
+        .await;
+    if let Some(local_desc) = downstream_conn.local_description().await {
+        println!("Paste from here to the 'Golang base64 Session Description' box:");
+        println!("{}", base64::encode(serde_json::to_string(&local_desc)?));
+    } else {
+        bail!("downstream_conn has no local_description");
+    }
+
+    loop {
+        tokio::select! {
+            item = upstream_session.next() => {
+                match item {
+                    Some(Ok(CodecItem::VideoFrame(f))) => {
+                        if let Some(t) = tracks.get(f.stream_id()).and_then(Option::as_ref) {
+                            t.write_sample(&Sample {
+                                data: convert_h264(f)?.into(),
+
+                                // TODO: webrtc-rs appears to calculate the
+                                // timestamp from this frame's duration:
+                                // https://github.com/webrtc-rs/webrtc/blob/7681d923f216e281f86ca6e453529b9853eeceab/src/track/track_local/track_local_static_sample.rs#L65
+                                // https://github.com/webrtc-rs/rtp/blob/ef3be6febc7d4b261c2ad991cb4e467bb80ccce0/src/packetizer/mod.rs#L137
+                                // which is wrong and unknowable without lagging
+                                // a frame. The timestamp really should be based
+                                // on time elapsed since the *previous* frame;
+                                // maybe supply that here...
+                                duration: tokio::time::Duration::from_secs(1),
+                                ..Default::default()
+                            }).await?;
+                        }
+                    },
+                    Some(Ok(_)) => {},
+                    Some(Err(e)) => {
+                        return Err(anyhow!(e).context("upstream failure"));
+                    }
+                    None => {
+                        info!("upstream EOF");
+                        return Ok(());
+                    }
+                }
+            },
+            state = ice_conn_state_rx.recv() => {
+                let state = state.unwrap();
+                info!("ice conn state: {:?}", state);
+            },
+            state = peer_conn_state_rx.recv() => {
+                let state = state.unwrap();
+                info!("peer conn state: {:?}", state);
+                if matches!(state, RTCPeerConnectionState::Failed) {
+                    return Ok(());
+                }
+            },
+            _ = &mut stop_signal => {
+                info!("received ctrl-C");
+                break;
+            },
+        }
+    }
+
+    Ok(())
+}
+
+/// Converts from AVC representation to the Annex B representation expected by webrtc-rs.
+fn convert_h264(frame: VideoFrame) -> Result<Vec<u8>, Error> {
+    // TODO:
+    // * For each IDR frame, copy the SPS and PPS from the stream's
+    //   parameters, rather than depend on it being present in the frame
+    //   already. In-band parameters aren't guaranteed. This is awkward
+    //   with h264_reader v0.5's h264_reader::avcc::AvcDecoderRecord because it
+    //   strips off the NAL header byte from each parameter. The next major
+    //   version shouldn't do this.
+    // * Copy only the slice data. In particular, don't copy SEI, which confuses
+    //   Safari: <https://github.com/scottlamb/retina/issues/60#issuecomment-1178369955>
+
+    let mut data = frame.into_data();
+    let mut i = 0;
+    while i < data.len() - 3 {
+        // Replace each NAL's length with the Annex B start code b"\x00\x00\x00\x01".
+        let len = u32::from_be_bytes([data[i], data[i + 1], data[i + 2], data[i + 3]]) as usize;
+        data[i] = 0;
+        data[i + 1] = 0;
+        data[i + 2] = 0;
+        data[i + 3] = 1;
+        i += 4 + len;
+        if i > data.len() {
+            bail!("partial NAL body");
+        }
+    }
+    if i < data.len() {
+        bail!("partial NAL length");
+    }
+    Ok(data)
+}