static err_t
low_level_output(struct netif *netif, struct pbuf *p)
{
if (!dev)
return ERR_OK;
#ifdef ETH_PAD_SIZE
pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
#endif
/* Send the data from the pbuf to the interface, one pbuf at a
time. The size of the data in each pbuf is kept in the ->len
variable. */
if (!p->next) {
/* Only one fragment, can send it directly */
netfront_xmit(dev, p->payload, p->len);
} else {
unsigned char data[p->tot_len], *cur;
struct pbuf *q;
for(q = p, cur = data; q != NULL; cur += q->len, q = q->next)
memcpy(cur, q->payload, q->len);
netfront_xmit(dev, data, p->tot_len);
}
#if ETH_PAD_SIZE
pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
#endif
LINK_STATS_INC(link.xmit);
return ERR_OK;
}
void
VIFHYPER_SEND(struct virtif_user *viu,
struct iovec *iov, size_t iovlen)
{
size_t tlen, i;
int nlocks;
void *d;
char *d0;
rumpkern_unsched(&nlocks, NULL);
/*
* netfront doesn't do scatter-gather, so just simply
* copy the data into one lump here.
*/
if (iovlen == 1) {
d = iov->iov_base;
tlen = iov->iov_len;
} else {
for (i = 0, tlen = 0; i < iovlen; i++) {
tlen += iov[i].iov_len;
}
d = d0 = malloc(tlen);
for (i = 0; i < iovlen; i++) {
memcpy(d0, iov[i].iov_base, iov[i].iov_len);
d0 += iov[i].iov_len;
}
}
netfront_xmit(viu->viu_dev, d, tlen);
if (iovlen != 1)
free(d);
rumpkern_sched(nlocks, NULL);
}
int write(int fd, const void *buf, size_t nbytes)
{
if (fd < 0 || fd >= NOFILE) {
fd = EBADF;
return -1;
}
switch (files[fd].type) {
case FTYPE_SAVEFILE: {
int ret = 0, tot = nbytes;
while (nbytes > 0) {
ret = xencons_ring_send(files[fd].cons.dev, (char *)buf, nbytes);
nbytes -= ret;
buf = (char *)buf + ret;
}
return tot - nbytes;
}
case FTYPE_CONSOLE:
console_print(files[fd].cons.dev, (char *)buf, nbytes);
return nbytes;
#ifdef HAVE_LWIP
case FTYPE_SOCKET:
return lwip_write(files[fd].socket.fd, (void*) buf, nbytes);
#endif
case FTYPE_TAP:
netfront_xmit(files[fd].tap.dev, (void*) buf, nbytes);
return nbytes;
default:
break;
}
printk("write(%d): Bad descriptor\n", fd);
errno = EBADF;
return -1;
}
static void minios_transmit (struct nic *nic, const char *d, unsigned int t,
unsigned int s, const char *p)
{
struct frame *frame = alloca(sizeof(frame) + s);
memcpy(frame->dest, d, ETH_ALEN);
memcpy(frame->src, nic->node_addr, ETH_ALEN);
frame->type = htons(t);
memcpy(frame->data, p, s);
netfront_xmit(net_dev, (void*) frame, sizeof(*frame) + s);
}
int write(int fd, const void *buf, size_t nbytes)
{
switch (files[fd].type) {
case FTYPE_SAVEFILE: {
int ret = 0, tot = nbytes;
while (nbytes > 0) {
ret = xencons_ring_send(files[fd].cons.dev, (char *)buf, nbytes);
nbytes -= ret;
buf = (char *)buf + ret;
}
return tot - nbytes;
}
case FTYPE_CONSOLE:
console_print(files[fd].cons.dev, (char *)buf, nbytes);
return nbytes;
#ifdef HAVE_LWIP
case FTYPE_SOCKET:
return lwip_write(files[fd].socket.fd, (void*) buf, nbytes);
#endif
#ifdef CONFIG_NETFRONT
case FTYPE_TAP:
netfront_xmit(files[fd].tap.dev, (void*) buf, nbytes);
return nbytes;
#endif
#ifdef CONFIG_BLKFRONT
case FTYPE_BLK:
return blkfront_posix_write(fd, buf, nbytes);
#endif
#ifdef CONFIG_TPMFRONT
case FTYPE_TPMFRONT:
return tpmfront_posix_write(fd, buf, nbytes);
#endif
#ifdef CONFIG_TPM_TIS
case FTYPE_TPM_TIS:
return tpm_tis_posix_write(fd, buf, nbytes);
#endif
default:
break;
}
printk("write(%d): Bad descriptor\n", fd);
errno = EBADF;
return -1;
}
/*----------------------------------------------------------------------------*/
void sendViaEth(ethernet_frame_t* eth)
{
uint8_t sendBuffer[max_frame_size]; // the byte array that will be sent
uint8_t current_offset; // keeps track of current offset in the buffer
uint8_t padding_len; // how much padding is required
uint8_t message_len; // length of the message being sent
createMac((uint8_t*)&(eth->eth_header.dest),dom0mac);
createMac((uint8_t*)&(eth->eth_header.source),mymac);
eth->eth_header.data_len = 0x0008; // 0x0008 means frame's content is IP
writeEthernetHeader(sendBuffer, &(eth->eth_header), ethernet_header_offset);
writeIPHeader(sendBuffer, &(eth->ip_header), ip_header_offset);
writeUdpHeader(sendBuffer, &(eth->udp_header), udp_header_offset);
writeMessage(sendBuffer, ð->message, message_offset);
message_len = eth->message.length;
current_offset = message_offset+message_len;
if(sum_headers_len + message_len < min_frame_size)
{
padding_len = min_frame_size - (sum_headers_len + message_len );
writePadding(sendBuffer, current_offset, padding_len);
current_offset += padding_len;
}
else
{
padding_len = 0;
}
writeChecksum(sendBuffer, current_offset);
//netfront_xmit(xen_network_device,(unsigned char*) sendBuffer, current_offset+frame_checksum_length);
netfront_xmit(net_dev,(unsigned char*) sendBuffer, current_offset+frame_checksum_length);//change it to linux version
}
