mirrors/sway
1
0
Fork 0
mirror of https://github.com/swaywm/sway.git synced 2025-11-14 06:59:47 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

ipc: fix aligment issue of data buffer

Browse source 
The pointer `data` is cast to a more strictly aligned pointer type. To
prevent issues, the `data32` buffer is removed and its occurrences are
replaced with an offset from the `data` buffer.
This commit is contained in:
Antonin Décimo 2020-06-04 13:00:45 +02:00 • committed by Tudor Brindus
parent b20d52f71d
commit 8033b575f7
2 changed files with 9 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

10
sway/ipc-server.c
View file

@ -242,7 +242,6 @@ int ipc_client_handle_readable(int client_fd, uint32_t mask, void *data) {
}
uint8_t buf[IPC_HEADER_SIZE];
uint32_t *buf32 = (uint32_t*)(buf + sizeof(ipc_magic));
// Should be fully available, because read_available >= IPC_HEADER_SIZE
ssize_t received = recv(client_fd, buf, IPC_HEADER_SIZE, 0);
if (received == -1) {
@ -257,8 +256,8 @@ int ipc_client_handle_readable(int client_fd, uint32_t mask, void *data) {
return 0;
}
memcpy(&client->pending_length, &buf32[0], sizeof(buf32[0]));
memcpy(&client->pending_type, &buf32[1], sizeof(buf32[1]));
memcpy(&client->pending_length, buf + sizeof(ipc_magic), sizeof(uint32_t));
memcpy(&client->pending_type, buf + sizeof(ipc_magic) + sizeof(uint32_t), sizeof(uint32_t));
if (read_available - received >= (long)client->pending_length) {
// Reset pending values.
@ -920,11 +919,10 @@ bool ipc_send_reply(struct ipc_client *client, enum ipc_command_type payload_typ
assert(payload);
char data[IPC_HEADER_SIZE];
uint32_t *data32 = (uint32_t*)(data + sizeof(ipc_magic));
memcpy(data, ipc_magic, sizeof(ipc_magic));
memcpy(&data32[0], &payload_length, sizeof(payload_length));
memcpy(&data32[1], &payload_type, sizeof(payload_type));
memcpy(data + sizeof(ipc_magic), &payload_length, sizeof(payload_length));
memcpy(data + sizeof(ipc_magic) + sizeof(payload_length), &payload_type, sizeof(payload_type));
while (client->write_buffer_len + IPC_HEADER_SIZE + payload_length >=
client->write_buffer_size) {