tomato/docs/Group-Chats.md
Green Sky aae086cc65 Squashed 'external/toxcore/c-toxcore/' changes from e2c01e457b..b03b571272
b03b571272 fix: flaky tcp test This only fixes the symptoms, not the real problem. Sometimes or consistently on some platforms a socket might need a moment before it can be written to.
32e67ab4c2 cleanup: use typedef for private message ID's in callback
7b1db6adc1 feat: add message IDs to private group messages
99e0bcc27d refactor: Observers/ignored peers can now send and receive custom packets
b3c3c49d26 fix: Disable IPv6 in Windows cross-compilation tests
e742deddff feat: Check hashes of Windows dependencies when cross-compiling
dfb9a0b02b fix: Test the current Windows Dockerfile, not an old Dockerhub image
14de93ccec chore: Use WineHQ's Wine as Debian Bookworm's crashes
ed37616249 docs: Update the Windows cross-compilation section
9bb79c174f cleanup: Remove a couple of unnecessary misc_tools dependencies
19475adb70 chore: Statically link OpenMP into the cracker fun util on Windows
1be311e51f feat: Build the fun utils when cross-compiling to Windows
88133f8446 chore: Strip Windows binaries
3cc0ae7535 refactor: Copy over all of the required static dependencies
c4fa8f7fb1 feat: Generate .def, .exp and .lib files when building for Windows
74bbac5363 feat: Let CMake create the dll instead of doing so ourselves
246642e9ae feat: Harden Windows cross-compilation
8d431c0d11 chore: Bump Windows build dependency versions
e519f7998b fix: Remove unnecessary wsock32 dependency on Windows
ed2b60c217 chore: Use a specific non-broken slimcc version.
d7f21010a1 chore: Update github actions.
e71a68b7f2 docs: Update the list of CMake options
77e08876ff chore: Remove mod and founder from group API naming scheme
12bc042767 docs: add the experimental api build option to INSTALL.md
e1fa5cae96 refactor: Rename Queries to Query to align with other enums.
be82a3ea30 fix: Correct type for conference offline peer numbers.
0627c36716 test: Add pkgsrc build.
92578afe4b test: Add FreeBSD VM action on GitHub.
52ece0f57b test: Build toxcore on NetBSD (VM).
3fe8ee2c11 chore: Only install tox_private.h on request.
9a8dfa06ab fix: save_compatibility_test failing on big-endian systems
86f5e55578 fix: Don't serve files from websockify.
710eb674a5 fix: Correctly pass extended public keys to group moderation code.
021db7031c refactor: Use `struct`s for extended public/secret keys.
a1e999fd80 chore: Compile libsodium reference implementation with compcert.
fbe3c19cf5 cleanup: correct a few nullable annotations
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c71567dc18 fix: Pass array, not array pointer, to `memcmp`.
9b46a08144 cleanup: Never pass `void*` directly to `memcpy`.
5d7b7a7bbc refactor: Use tox rng to seed the keypair generation.
961891d568 cleanup: Small improvements found by PVS Studio.
8201019f0d chore: Disable NGC saving by default, enable through Tox_Options.
5dd9ee3f65 cleanup: Replace pointer arithmetic with explicit `&arr[i]`.
ca4606d49d refactor: Use strong typedef for NGC peer id.
442213b722 cleanup: Simplify custom packet length check in NGC.
08d3393def fix: Correct a few potential null derefs in bootstrap daemon.
b9877b32b0 fix: Add missing memunlock of local variable when it goes out of scope.
dab5fe44b9 fix: Zero out stack-allocated secret key before return.
f058103299 refactor: Make prune_gc_sanctions_list more obviously correct.
3ba7a0dec9 docs: Add static analysis tool list to README.
8d0811a0f3 docs: Run prettier-markdown on markdown files.
969e3a2bfc refactor: Fix network test not using the strong typedef
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9fe18b176f fix: Fix some false positive from PVS Studio.
7c44379ccb cleanup: Check that WINXP macro exists before comparing it.
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aacff73939 docs: Fix up doxyfile.
d55fc85ff5 docs: Add more documentation to crypto_core.
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8b05296a78 chore: Check that both gtest and gmock exist for tests.
42010660e1 test: Add slimcc compiler compatibility test.
b473630321 chore: Add some comments to the astyle config.
b7404f24f6 cleanup: Remove implicit bool conversions.
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4359e3a6bc chore: Rename C++ headers to .hh suffixes.
0c05566e58 cleanup: Further `#include` cleanups.
8d29935b7a chore: Only check the bootstrap daemon checksum on release.
f70e588bc6 cleanup: Add more `const` where possible.
511bfe39c8 cleanup: Use Bazel modules to enforce proper `#include` hygiene.
1710a0d091 refactor: Move pack/unpack `IP_Port` from DHT into network module.
a975943564 chore: Really fix coverage docker image build.
c08409390f chore: Fix post-submit coverage image.
39aadf8922 fix: Don't use `memcmp` to compare `IP_Port`s.
d94246a906 fix: partially fix a bug that prevented group part messages from sending.
eeaa039222 chore: Fix rpm build; add a CI check for it.
8328449c1a chore: Speed up docker builds a bit by reducing layer count.
d6d67d56f3 cleanup: Add `const` where possible in auto tests.
6aa9e6850d cleanup: Minor cleanup of event unpack code.
bdf460a3a9 refactor: Rename `system_{memory,...}` to `os_{memory,...}`.
203e1af81e fix: a few off by one errors in group autotests
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8f07755834 cleanup: Use `memzero(x, s)` instead of `memset(x, 0, s)`.
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1cdcf938b9 cleanup: Add comment after every `#endif`.
ba99d4dc4b test: Fix comment I broke in the events test PR.
e07248debb refactor: Migrate auto_tests to new events API.
bdd42b5452 refactor: Add common msgpack array packer with callback.
3c659f5288 cleanup: Rename group to conference in groupav documentation.
89957be230 cleanup: Ensure handler params are named after callback params.
c650d9d345 refactor: Pass `this` pointer as first param to s11n callbacks.
e7fb91ddb8 refactor: Allow NULL pointers for byte arrays in events.
5e2c8cabc1 cleanup: make some improvements to group moderation test
259de4867e cleanup: Remove `bin_pack_{new,free}`.
21a8ff5895 cleanup: skip a do_gc iteration before removing peers marked for deletion
16809dc36e feat: Add dht_get_nodes_response event to the events system.

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: b03b5712720de9a9901ea12fd741f177327a7021
2024-03-07 23:12:55 +01:00

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Markdown

Group chats.
Note: we assume everyone in the chat trusts each other.
These group chats work by temporarily adding the 4 "closest" people defined by a
distance function in group.c in order to form a circle of connected peers. These
peers then relay messages to each other.
A friend invites another friend to a group chat by sending them an invite
packet. The friend either ignores the invite or responds with a response packet
if he wants to join the chat. The friend invite contains the type of groupchat
(text only, A/V) the friend is being invited to.
TODO(irungentoo): write more of this.
## Protocol
Invite packets:
### Invite packet:
```
[uint8_t id 96][uint8_t id 0][uint16_t group chat number][33 bytes group chat identifier[1 byte type][32 bytes id]]
```
### Response packet
```
[uint8_t id 96][uint8_t id 1][uint16_t group chat number(local)][uint16_t group chat number to join][33 bytes group chat identifier[1 byte type][32 bytes id]]
```
### Peer online packet:
```
[uint8_t id 97][uint16_t group chat number (local)][33 bytes group chat identifier[1 byte type][32 bytes id]]
```
### Peer leave packet:
```
[uint8_t id 98][uint16_t group chat number][uint8_t id 1]
```
### Peer query packet:
```
[uint8_t id 98][uint16_t group chat number][uint8_t id 8]
```
### Peer response packet:
```
[uint8_t id 98][uint16_t group chat number][uint8_t id 9][Repeated times number of peers: [uint16_t peer num][uint8_t 32bytes real public key][uint8_t 32bytes temp DHT public key][uint8_t name length][name]]
```
### Title response packet:
```
[uint8_t id 98][uint16_t group chat number][uint8_t id 10][title]
```
### Message packets:
```
[uint8_t id 99][uint16_t group chat number][uint16_t peer number][uint32_t message number][uint8_t with a value representing id of message][data]
```
### Lossy Message packets:
```
[uint8_t id 199][uint16_t group chat number][uint16_t peer number][uint16_t message number][uint8_t with a value representing id of message][data]
```
## Group chat types:
- 0: text
- 1: AV
Note: the message number is increased by 1 for each sent message.
## message ids:
### 0 - ping
sent every ~60 seconds by every peer. No data.
### 16 - new_peer
Tell everyone about a new peer in the chat.
```
[uint16_t peer_num][uint8_t 32bytes real public key][uint8_t 32bytes temp DHT public key]
```
### 17 - kill_peer
```
[uint16_t peer_num]
```
### 48 - name change
```
[uint8_t name[namelen]]
```
### 49 - groupchat title change
```
[uint8_t title[titlelen]]
```
### 64 - chat message
```
[uint8_t message[messagelen]]
```
### 65 - action (/me)
```
[uint8_t message[messagelen]]
```