void send_file(int sockfd, int* clientlen, struct sockaddr_in* clientaddr, Request* req) {
int last_sent = -1;
FILE *fp = open_file(req->filename);
int file_size = get_filesize(fp);
int final_seq_num = (file_size / DATASIZE); // this accounts for 0 byte DataPkt for file_size % 512 == 0
int window_min = 0;
// window_max can't be greater than final_seq_num
int window_max = (req->window_size - 1 > final_seq_num) ? final_seq_num : (req->window_size - 1);
int num_timeouts = 0;
int n;
fd_set read_set;
struct timeval timeout;
// printf("data size is %d and final_seq_num is %d\n", file_size, final_seq_num);
// printf("window_size is %d and window_max is %d\n", req->window_size, window_max);
// printf("about to send pkts\n");
last_sent = send_pkts(fp, file_size, last_sent, window_max, sockfd, clientlen, clientaddr);
while (1) {
DataPkt ack;
bzero(ack.data, DATASIZE);
FD_ZERO(&read_set);
timeout.tv_sec = 0;
timeout.tv_usec = TIMEOUT_USEC;
FD_SET(sockfd, &read_set);
n = select(sockfd + 1, &read_set, NULL, NULL, &timeout);
if (n == 0) { // timed out
// printf("timed out %d times\n", num_timeouts);
num_timeouts++;
if (num_timeouts == MAX_TIMEOUTS) {
return; // stop communication
}
last_sent = send_pkts(fp, file_size, window_min - 1, window_max, sockfd, clientlen, clientaddr);
}
else {
n = recvfrom(sockfd, (char *) &ack, (TYPEWINDOWSEQSIZE * 2), 0,
(struct sockaddr *) clientaddr, clientlen);
if (n < 0)
error("ERROR in recvfrom");
// printf("got ack for pkt %d\n", ack.seq_num);
if (ack.seq_num >= window_min) { // ACK is new
if (ack.seq_num == final_seq_num) {
// printf("TRANSFER DONE!\n");
return; // completed
}
// adjust window accordingly
window_min = ack.seq_num + 1;
window_max = (window_min + (req->window_size - 1) > final_seq_num) ? final_seq_num : (window_min + (req->window_size - 1));
// printf("window_min is now %d and window_max is now %d\n", window_min, window_max);
// printf("sending next set of pkts\n");
last_sent = send_pkts(fp, file_size, last_sent, window_max, sockfd, clientlen, clientaddr);
// printf("last sent %d\n", last_sent);
}
}
}
}
int main(int argc, char **argv) {
// eal args
int num_args = rte_eal_init(argc, argv);
if (num_args < 0)
rte_exit(EXIT_FAILURE, "init failed");
argc -= num_args;
argv += num_args;
// our args: [-s] port1 port2
uint8_t port1, port2;
char opt = getopt(argc, argv, "s");
bool simple_tx = opt == 's';
if (simple_tx) {
printf("Requesting simple tx path\n");
argc--;
argv++;
} else {
printf("Requesting full-featured tx path\n");
}
if (argc != 3) {
printf("usage: [-s] port1 port2\n");
return -1;
}
port1 = atoi(argv[1]);
port2 = atoi(argv[2]);
printf("Using ports %d and %d\n", port1, port2);
if (!config_port(port1, simple_tx)) return -1;
if (!config_port(port2, simple_tx)) return -1;
struct rte_mempool* pool = make_mempool();
uint64_t sent = 0;
uint64_t next_print = rte_get_tsc_hz();
uint64_t last_sent = 0;
while (true) {
sent += send_pkts(port1, pool);
sent += send_pkts(port2, pool);
uint64_t time = rte_rdtsc();
if (time >= next_print) {
double elapsed = (time - next_print + rte_get_tsc_hz()) / rte_get_tsc_hz();
uint64_t pkts = sent - last_sent;
printf("Packet rate: %.2f Mpps\n", (double) pkts / elapsed / 1000000);
next_print = time + rte_get_tsc_hz();
last_sent = sent;
}
}
return 0;
}
void *thr(void* arg)
{
struct node* n = arg;
struct rte_mbuf* restrict pkts[32];
int i;
int q = n->queue;
int start_sec = cursec();
int rcvd = 0;
int sent = 0;
init_thread(n->tid, n->core);
if (q >= 20) {
printf("Somehow, queue beyond 20\n");
}
while(1) {
/*int recv;*/
i = mbuf_alloc_bulk(pkts, 60, 32);
if (i != 0) {
printf("Error allocating packets %d\n", i);
break;
} else {
int send, recv;
/* Start setting MAC address */
for (i = 0; i < 32; i++) {
struct ether_hdr* hdr =
rte_pktmbuf_mtod(pkts[i],
struct ether_hdr*);
hdr->d_addr.addr_bytes[5] = (10 * q) + 1;
hdr->s_addr.addr_bytes[5] = (10 * q) + 2;
hdr->ether_type = rte_cpu_to_be_16(0x0800);
/*rte_mbuf_sanity_check(pkts[i], 1);*/
}
send = send_pkts(PORT_OUT, q, pkts, 32);
for (i = send; i < 32; i++) {
mbuf_free(pkts[i]);
}
recv = recv_pkts(PORT_IN, q, pkts, 32);
rcvd += recv;
sent += send;
if (cursec() != start_sec) {
printf("%d %d rx=%d tx=%d\n", n->core,
(cursec() - start_sec),
rcvd,
sent);
/*printf("recv_pkt\n");*/
/*rte_pktmbuf_dump(stdout, pkts[0], 16384);*/
start_sec = cursec();
rcvd = 0;
sent = 0;
}
for (int i = 0; i < recv; i++) {
mbuf_free(pkts[i]);
}
}
}
printf("Socket ID (%d) is %d. DONE\n", n->core, rte_socket_id());
return NULL;
}
static void *
sender_body(void *data)
{
struct targ *targ = (struct targ *) data;
struct pollfd fds[1];
struct netmap_if *nifp = targ->nifp;
struct netmap_ring *txring;
int i, n = targ->g->npackets / targ->g->nthreads, sent = 0;
int options = targ->g->options | OPT_COPY;
D("start");
if (setaffinity(targ->thread, targ->affinity))
goto quit;
/* setup poll(2) mechanism. */
memset(fds, 0, sizeof(fds));
fds[0].fd = targ->fd;
fds[0].events = (POLLOUT);
/* main loop.*/
gettimeofday(&targ->tic, NULL);
if (targ->g->use_pcap) {
int size = targ->g->pkt_size;
void *pkt = &targ->pkt;
pcap_t *p = targ->g->p;
for (i = 0; n == 0 || sent < n; i++) {
if (pcap_inject(p, pkt, size) != -1)
sent++;
if (i > 10000) {
targ->count = sent;
i = 0;
}
}
} else {
while (n == 0 || sent < n) {
/*
* wait for available room in the send queue(s)
*/
do {
i = poll(fds, 1, 2000);
if (i < 0) {
D("poll error/timeout on queue %d", targ->me);
goto quit;
}
} while (i==0);
/*
* scan our queues and send on those with room
*/
if (options & OPT_COPY && sent > 100000 && !(targ->g->options & OPT_COPY) ) {
D("drop copy");
options &= ~OPT_COPY;
}
for (i = targ->qfirst; i < targ->qlast; i++) {
int m, limit = targ->g->burst;
if (n > 0 && n - sent < limit)
limit = n - sent;
txring = NETMAP_TXRING(nifp, i);
if (txring->avail == 0)
continue;
m = send_pkts(txring, targ->pkts, targ->g->pkt_size,
limit, options, sent, targ->npkts);
sent += m;
targ->count = sent;
}
}
/* flush any remaining packets */
ioctl(fds[0].fd, NIOCTXSYNC, NULL);
/* final part: wait all the TX queues to be empty. */
for (i = targ->qfirst; i < targ->qlast; i++) {
txring = NETMAP_TXRING(nifp, i);
while (!NETMAP_TX_RING_EMPTY(txring)) {
ioctl(fds[0].fd, NIOCTXSYNC, NULL);
usleep(1); /* wait 1 tick */
}
}
}
gettimeofday(&targ->toc, NULL);
targ->completed = 1;
targ->count = sent;
quit:
/* reset the ``used`` flag. */
targ->used = 0;
return (NULL);
}