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eapol: Refactor eapol tx path

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This commit is contained in:
Denis Kenzior 2016-06-28 18:45:49 -05:00
parent de84aff10b
commit 943acddb49
2 changed files with 34 additions and 43 deletions
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75
src/eapol.c
View File

@ -793,6 +793,36 @@ static void eapol_timeout(struct l_timeout *timeout, void *user_data)
MPDU_REASON_CODE_4WAY_HANDSHAKE_TIMEOUT);
}
static void eapol_tx_packet(struct eapol_sm *sm, const struct eapol_frame *ef)
{
size_t frame_size;
struct sockaddr_ll sll;
ssize_t r;
int fd;
if (!sm->io) {
tx_packet(sm->ifindex, sm->aa, sm->spa, ef, sm->tx_user_data);
return;
}
fd = l_io_get_fd(sm->io);
memset(&sll, 0, sizeof(sll));
sll.sll_family = AF_PACKET;
sll.sll_ifindex = sm->ifindex;
sll.sll_protocol = htons(ETH_P_PAE);
sll.sll_halen = ETH_ALEN;
memcpy(sll.sll_addr, sm->aa, ETH_ALEN);
frame_size = sizeof(struct eapol_header) +
L_BE16_TO_CPU(ef->header.packet_len);
r = sendto(fd, ef, frame_size, 0,
(struct sockaddr *) &sll, sizeof(sll));
if (r < 0)
l_error("EAPoL write socket: %s", strerror(errno));
}
static void eapol_handle_ptk_1_of_4(uint32_t ifindex, struct eapol_sm *sm,
const struct eapol_key *ek)
{
@ -844,8 +874,7 @@ static void eapol_handle_ptk_1_of_4(uint32_t ifindex, struct eapol_sm *sm,
}
memcpy(step2->key_mic_data, mic, sizeof(mic));
tx_packet(ifindex, sm->aa, sm->spa,
(struct eapol_frame *) step2, sm->tx_user_data);
eapol_tx_packet(sm, (struct eapol_frame *) step2);
l_free(step2);
l_timeout_remove(sm->timeout);
@ -1170,8 +1199,7 @@ static void eapol_handle_ptk_3_of_4(uint32_t ifindex,
goto fail;
memcpy(step4->key_mic_data, mic, sizeof(mic));
tx_packet(ifindex, sm->aa, sm->spa,
(struct eapol_frame *) step4, sm->tx_user_data);
eapol_tx_packet(sm, (struct eapol_frame *) step4);
sm->ptk_complete = true;
@ -1253,8 +1281,7 @@ static void eapol_handle_gtk_1_of_2(uint32_t ifindex,
goto done;
memcpy(step2->key_mic_data, mic, sizeof(mic));
tx_packet(ifindex, sm->aa, sm->spa,
(struct eapol_frame *) step2, sm->tx_user_data);
eapol_tx_packet(sm, (struct eapol_frame *) step2);
if (install_gtk) {
uint32_t cipher =
@ -1405,7 +1432,7 @@ static void eapol_eap_msg_cb(const uint8_t *eap_data, size_t len,
memcpy(frame->data, eap_data, len);
tx_packet(sm->ifindex, sm->aa, sm->spa, frame, sm->tx_user_data);
eapol_tx_packet(sm, frame);
}
/* This respresentes the eapTimout, eapFail and eapSuccess messages */
@ -1642,38 +1669,6 @@ static bool eapol_read(struct l_io *io, void *user_data)
return true;
}
/*
* Default implementation of the frame transmission function.
* This function expects an fd to be passed as user_data
*/
static int eapol_write(uint32_t ifindex, const uint8_t *aa, const uint8_t *spa,
const struct eapol_frame *ef, void *user_data)
{
int fd = L_PTR_TO_INT(user_data);
size_t frame_size;
struct sockaddr_ll sll;
ssize_t r;
memset(&sll, 0, sizeof(sll));
sll.sll_family = AF_PACKET;
sll.sll_ifindex = ifindex;
sll.sll_protocol = htons(ETH_P_PAE);
sll.sll_halen = ETH_ALEN;
memcpy(sll.sll_addr, aa, ETH_ALEN);
frame_size = sizeof(struct eapol_header) +
L_BE16_TO_CPU(ef->header.packet_len);
r = sendto(fd, ef, frame_size, 0,
(struct sockaddr *) &sll, sizeof(sll));
if (r < 0) {
l_error("EAPoL write socket: %s", strerror(errno));
return -errno;
}
return 0;
}
static bool eapol_get_nonce(uint8_t nonce[])
{
return l_getrandom(nonce, 32);
@ -1703,7 +1698,6 @@ bool eapol_init()
state_machines = l_queue_new();
protocol_version = EAPOL_PROTOCOL_VERSION_2004;
get_nonce = eapol_get_nonce;
tx_packet = eapol_write;
eap_init();
@ -1714,7 +1708,6 @@ bool eapol_exit()
{
l_queue_destroy(state_machines, eapol_sm_destroy);
get_nonce = NULL;
tx_packet = NULL;
eap_exit();

2
src/netdev.c
View File

@ -865,8 +865,6 @@ static void netdev_connect_event(struct l_genl_msg *msg,
goto error;
if (netdev->sm) {
eapol_sm_set_tx_user_data(netdev->sm,
L_INT_TO_PTR(l_io_get_fd(netdev->eapol_io)));
eapol_start(netdev->index, netdev->eapol_io, netdev->sm);
netdev->sm = NULL;