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DHCP processing semaphore added

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This commit is contained in:
Wiesner András 2023-02-24 11:29:32 +01:00
parent b45e8cd81d
commit 025f6d09b9
1 changed files with 7 additions and 0 deletions
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7
prefab/packet_parsers/dhcp.c
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@ -16,6 +16,7 @@ static struct {
cbd desc;
uint32_t tranId;
EthInterface *intf;
ETHLIB_OS_SEM_TYPE procSem;
} s;
static const uint8_t DHCP_MAGIC_COOKIE[] = {99, 130, 83, 99};
@ -248,6 +249,8 @@ void dhcp_request(ip4_addr reqAddr, ip4_addr dhcpServerAddr) {
}
static void dhcp_process(DhcpProps *props, DhcpOption *opts) {
ETHLIB_OS_SEM_WAIT(&s.procSem); // LOCK!
switch (s.state) {
case DHCP_INIT:
dhcp_discover(); // send discover message
@ -309,6 +312,8 @@ static void dhcp_process(DhcpProps *props, DhcpOption *opts) {
default:
break;
}
ETHLIB_OS_SEM_POST(&s.procSem); // RELEASE!
}
static int dhcp_resp_cb(const Pckt *pckt, PcktSieveLayerTag tag) {
@ -329,6 +334,8 @@ void dhcp_start() {
}
void dhcp_initiate(EthInterface *intf) {
ETHLIB_OS_SEM_CREATE(&s.procSem);
ETHLIB_OS_SEM_POST(&s.procSem);
s.state = DHCP_INIT;
s.buf = dynmem_alloc(DHCP_MIN_PACKET_SIZE);
s.desc = udp_new_connblock(intf, IPv4_ANY_ADDR, DHCP_CLIENT_PORT, dhcp_resp_cb);