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nested structs on the sender, for more lean packet size computation

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This commit is contained in:
Philippe Teuwen 2019-05-23 20:54:21 +02:00
parent 270afb89aa
commit fda181890c
1 changed files with 6 additions and 3 deletions
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9
client/cmdusart.c
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@ -169,15 +169,18 @@ static int usart_rx(uint8_t *data, size_t *len, uint32_t waittime) {
static int usart_txrx(uint8_t *srcdata, size_t srclen, uint8_t *dstdata, size_t *dstlen, uint32_t waittime) {
clearCommandBuffer();
struct {
struct payload_header {
uint32_t waittime;
} PACKED;
struct {
struct payload_header header;
uint8_t data[PM3_CMD_DATA_SIZE - sizeof(uint32_t)];
} PACKED payload;
payload.waittime = waittime;
payload.header.waittime = waittime;
if (srclen >= sizeof(payload.data))
return PM3_EOVFLOW;
memcpy(payload.data, srcdata, srclen);
SendCommandNG(CMD_USART_TXRX, (uint8_t *)&payload, srclen + sizeof(payload.waittime));
SendCommandNG(CMD_USART_TXRX, (uint8_t *)&payload, srclen + sizeof(payload.header));
PacketResponseNG resp;
if (!WaitForResponseTimeout(CMD_USART_TXRX, &resp, waittime + 500)) {
return PM3_ETIMEOUT;