110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
#if bios == 1
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#include <pxe/tftp.h>
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#include <pxe/pxe.h>
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#include <lib/real.h>
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#include <lib/print.h>
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#include <lib/libc.h>
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#include <mm/pmm.h>
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#include <lib/misc.h>
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uint32_t get_boot_server_info(void) {
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struct pxenv_get_cached_info cachedinfo = { 0 };
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cachedinfo.packet_type = 2;
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pxe_call(PXENV_GET_CACHED_INFO, ((uint16_t)rm_seg(&cachedinfo)), (uint16_t)rm_off(&cachedinfo));
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struct bootph *ph = (struct bootph*)(void *) (((((uint32_t)cachedinfo.buffer) >> 16) << 4) + (((uint32_t)cachedinfo.buffer) & 0xFFFF));
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return ph->sip;
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}
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struct file_handle *tftp_open(uint32_t server_ip, uint16_t server_port, const char *name) {
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int ret = 0;
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if (!server_ip) {
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server_ip = get_boot_server_info();
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}
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struct PXENV_UNDI_GET_INFORMATION undi_info = { 0 };
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ret = pxe_call(UNDI_GET_INFORMATION, ((uint16_t)rm_seg(&undi_info)), (uint16_t)rm_off(&undi_info));
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if (ret) {
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return NULL;
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}
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//TODO figure out a more proper way to do this.
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uint16_t mtu = undi_info.MaxTranUnit - 48;
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struct pxenv_get_file_size fsize = {
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.status = 0,
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.sip = server_ip,
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};
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strcpy((char*)fsize.name, name);
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ret = pxe_call(TFTP_GET_FILE_SIZE, ((uint16_t)rm_seg(&fsize)), (uint16_t)rm_off(&fsize));
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if (ret) {
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return NULL;
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}
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struct file_handle *handle = ext_mem_alloc(sizeof(struct file_handle));
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handle->size = fsize.file_size;
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handle->is_memfile = true;
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handle->pxe = true;
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handle->pxe_ip = server_ip;
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handle->pxe_port = server_port;
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struct pxenv_open open = {
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.status = 0,
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.sip = server_ip,
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.port = (server_port) << 8,
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.packet_size = mtu
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};
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strcpy((char*)open.name, name);
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ret = pxe_call(TFTP_OPEN, ((uint16_t)rm_seg(&open)), (uint16_t)rm_off(&open));
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if (ret) {
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print("tftp: Failed to open file %x or bad packet size", open.status);
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pmm_free(handle, sizeof(struct file_handle));
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return NULL;
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}
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mtu = open.packet_size;
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uint8_t *buf = conv_mem_alloc(mtu);
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handle->fd = ext_mem_alloc(handle->size);
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size_t progress = 0;
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bool slow = false;
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while (progress < handle->size) {
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struct pxenv_read read = {
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.boff = ((uint16_t)rm_off(buf)),
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.bseg = ((uint16_t)rm_seg(buf)),
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};
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ret = pxe_call(TFTP_READ, ((uint16_t)rm_seg(&read)), (uint16_t)rm_off(&read));
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if (ret) {
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panic(false, "tftp: Read failure");
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}
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memcpy(handle->fd + progress, buf, read.bsize);
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progress += read.bsize;
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if (read.bsize < mtu && !slow && progress < handle->size) {
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slow = true;
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print("tftp: Server is sending the file in smaller packets (it sent %d bytes), download might take longer.\n", read.bsize);
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}
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}
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uint16_t close = 0;
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ret = pxe_call(TFTP_CLOSE, ((uint16_t)rm_seg(&close)), (uint16_t)rm_off(&close));
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if (ret) {
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panic(false, "tftp: Close failure");
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}
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pmm_free(buf, mtu);
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return handle;
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}
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#endif
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