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/*
* TFTP data output backend
*/
#include <string.h>
#include <stdio.h>
#include <syslinux/pxe.h>
#include <syslinux/config.h>
#include <netinet/in.h>
#include <sys/times.h>
#include <fs/pxe/pxe.h>
#include <fs/pxe/url.h>
#include <fs/pxe/tftp.h>
#include "upload_backend.h"
const char *tftp_string_error_message[]={
"Unknown error",
"File not found",
"Access Denied",
"Disk Full",
"Illegal Operation",
"Unknown Transfer ID",
"File already exists",
"Unknown User",
"Negotiation failed",
/* These are not in any RFC, defined internally */
"Unable to resolve hostname",
"Unable to connect",
"No Error",
"Network unavailable",
};
static bool have_real_network(void);
static int upload_tftp_write(struct upload_backend *be) {
const union syslinux_derivative_info *sdi =
syslinux_derivative_info();
struct url_info url;
struct inode inode;
char url_path[255] = {0};
uint32_t ip;
int err;
if (!have_real_network()) {
dprintf("\nNot running from the network\n");
return -TFTP_ERR_NO_NETWORK;
}
if (be->argv[1]) {
ip = pxe_dns(be->argv[1]);
if (!ip) {
dprintf("\nUnable to resolve hostname: %s\n", be->argv[1]);
return -TFTP_ERR_UNABLE_TO_RESOLVE;
}
} else {
ip = sdi->pxe.ipinfo->serverip;
if (!ip) {
dprintf("\nNo server IP address\n");
return -TFTP_ERR_UNABLE_TO_CONNECT;
}
}
snprintf(url_path, sizeof(url_path), "tftp://%u.%u.%u.%u/%s",
((uint8_t *)&ip)[0],
((uint8_t *)&ip)[1],
((uint8_t *)&ip)[2],
((uint8_t *)&ip)[3],
be->argv[0]);
parse_url(&url, url_path);
url.ip = ip;
dprintf("Connecting to %s to send %s\n", url.host, url.path);
err = tftp_put(&url, 0, &inode, NULL, be->outbuf, be->zbytes);
if (-err != TFTP_OK)
printf("upload_tftp_write: TFTP server returned error %d : %s\n", err, tftp_string_error_message[-err]);
return -err;
}
struct upload_backend upload_tftp = {
.name = "tftp",
.helpmsg = "filename [tftp_server]",
.minargs = 1,
.write = upload_tftp_write,
};
/*
* Dummy functions to prevent link failure for non-network cores
*/
static int _dummy_tftp_put(struct url_info *url, int flags,
struct inode *inode, const char **redir,
char *data, int data_length)
{
(void)url;
(void)flags;
(void)inode;
(void)redir;
(void)data;
(void)data_length;
return -TFTP_ERR_NO_NETWORK;
}
__weak int __attribute__((alias("_dummy_tftp_put")))
tftp_put(struct url_info *url, int flags, struct inode *inode,
const char **redir, char *data, int data_length);
static int _dummy_tftp_put(struct url_info *url, int flags,
struct inode *inode, const char **redir,
char *data, int data_length);
static bool have_real_network(void)
{
return tftp_put != _dummy_tftp_put;
}
__weak uint32_t pxe_dns(const char *host)
{
(void)host;
return 0;
}
__weak void parse_url(struct url_info *ui, char *url)
{
(void)ui;
(void)url;
}
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