static void test_ipv6_multi_frags(void)
{
struct net_pkt *pkt;
struct net_buf *frag;
struct ipv6_hdr *ipv6;
struct udp_hdr *udp;
int bytes, remaining = strlen(example_data), pos = 0;
/* Example of multi fragment scenario with IPv6 */
pkt = net_pkt_get_reserve_rx(0, K_FOREVER);
frag = net_pkt_get_reserve_rx_data(LL_RESERVE, K_FOREVER);
/* Place the IP + UDP header in the first fragment */
if (!net_buf_tailroom(frag)) {
ipv6 = (struct ipv6_hdr *)(frag->data);
udp = (struct udp_hdr *)((void *)ipv6 + sizeof(*ipv6));
if (net_buf_tailroom(frag) < sizeof(ipv6)) {
printk("Not enough space for IPv6 header, "
"needed %zd bytes, has %zd bytes\n",
sizeof(ipv6), net_buf_tailroom(frag));
zassert_true(false, "No space for IPv6 header");
}
net_buf_add(frag, sizeof(ipv6));
if (net_buf_tailroom(frag) < sizeof(udp)) {
printk("Not enough space for UDP header, "
"needed %zd bytes, has %zd bytes\n",
sizeof(udp), net_buf_tailroom(frag));
zassert_true(false, "No space for UDP header");
}
net_pkt_set_appdata(pkt, (void *)udp + sizeof(*udp));
net_pkt_set_appdatalen(pkt, 0);
}
net_pkt_frag_add(pkt, frag);
/* Put some data to rest of the fragments */
frag = net_pkt_get_reserve_rx_data(LL_RESERVE, K_FOREVER);
if (net_buf_tailroom(frag) -
(CONFIG_NET_BUF_DATA_SIZE - LL_RESERVE)) {
printk("Invalid number of bytes available in the buf, "
"should be 0 but was %zd - %d\n",
net_buf_tailroom(frag),
CONFIG_NET_BUF_DATA_SIZE - LL_RESERVE);
zassert_true(false, "Invalid byte count");
}
if (((int)net_buf_tailroom(frag) - remaining) > 0) {
printk("We should have been out of space now, "
"tailroom %zd user data len %zd\n",
net_buf_tailroom(frag),
strlen(example_data));
zassert_true(false, "Still space");
}
while (remaining > 0) {
int copy;
bytes = net_buf_tailroom(frag);
copy = remaining > bytes ? bytes : remaining;
memcpy(net_buf_add(frag, copy), &example_data[pos], copy);
DBG("Remaining %d left %d copy %d\n", remaining, bytes, copy);
pos += bytes;
remaining -= bytes;
if (net_buf_tailroom(frag) - (bytes - copy)) {
printk("There should have not been any tailroom left, "
"tailroom %zd\n",
net_buf_tailroom(frag) - (bytes - copy));
zassert_true(false, "There is still tailroom left");
}
net_pkt_frag_add(pkt, frag);
if (remaining > 0) {
frag = net_pkt_get_reserve_rx_data(LL_RESERVE,
K_FOREVER);
}
}
bytes = net_pkt_get_len(pkt);
if (bytes != strlen(example_data)) {
printk("Invalid number of bytes in message, %zd vs %d\n",
strlen(example_data), bytes);
zassert_true(false, "Invalid number of bytes");
}
/* Normally one should not unref the fragment list like this
* because it will leave the pkt->frags pointing to already
* freed fragment.
*/
net_pkt_frag_unref(pkt->frags);
zassert_not_null(pkt->frags, "Frag list empty");
pkt->frags = NULL; /* to prevent double free */
net_pkt_unref(pkt);
}
void http_rx_tx(struct net_context *net_ctx, struct net_pkt *rx, int status,
void *user_data)
{
struct http_server_ctx *http_ctx = NULL;
struct net_buf *data = NULL;
u16_t rcv_len;
u16_t offset;
int parsed_len;
int rc;
if (status) {
printf("[%s:%d] Status code: %d, <%s>\n",
__func__, __LINE__, status, RC_STR(status));
goto lb_exit;
}
if (!user_data) {
printf("[%s:%d] User data is null\n", __func__, __LINE__);
goto lb_exit;
}
http_ctx = (struct http_server_ctx *)user_data;
if (http_ctx->net_ctx != net_ctx) {
printf("[%s:%d] Wrong network context received\n",
__func__, __LINE__);
goto lb_exit;
}
if (!rx) {
printf("[%s:%d] Connection closed by peer\n",
__func__, __LINE__);
goto lb_exit;
}
rcv_len = net_pkt_appdatalen(rx);
if (rcv_len == 0) {
/* don't print info about zero-length app data buffers */
goto lb_exit;
}
data = net_buf_alloc(&http_msg_pool, APP_SLEEP_MSECS);
if (data == NULL) {
printf("[%s:%d] Data buffer alloc error\n", __func__, __LINE__);
goto lb_exit;
}
offset = net_pkt_get_len(rx) - rcv_len;
rc = net_frag_linear_copy(data, rx->frags, offset, rcv_len);
if (rc != 0) {
printf("[%s:%d] Linear copy error\n", __func__, __LINE__);
goto lb_exit;
}
data->data[min(data->size - 1, rcv_len)] = 0;
parser_init(http_ctx);
parsed_len = parser_parse_request(http_ctx, data);
if (parsed_len <= 0) {
printf("[%s:%d] Received: %u bytes, only parsed: %d bytes\n",
__func__, __LINE__, rcv_len, parsed_len);
}
if (http_ctx->parser.http_errno != HPE_OK) {
http_response_400(http_ctx, NULL);
} else {
http_tx(http_ctx);
}
lb_exit:
net_pkt_frag_unref(data);
net_pkt_unref(rx);
http_ctx_release(http_ctx);
}
