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net: remove CONFIG_MCAST_TFTP

Browse Source 
No mainline board enables CONFIG_MCAST_TFTP and there have been
compilation issues with the code for some time. Additionally, it has a
potential buffer underrun issue (reported as a side note in
CVE-2018-18439).

Remove the multicast TFTP code but keep the driver API for the future
addition of IPv6.

Cc: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Signed-off-by: Chris Packham <judge.packham@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Chris Packham 2018-11-26 21:00:29 +13:00 committed by Joe Hershberger
parent 1a4af5c562
commit 67bb984249
10 changed files with 6 additions and 273 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
README
View File

@ -1429,15 +1429,6 @@ The following options need to be configured:
forwarded through a router.
(Environment variable "netmask")
- Multicast TFTP Mode:
CONFIG_MCAST_TFTP
Defines whether you want to support multicast TFTP as per
rfc-2090; for example to work with atftp. Lets lots of targets
tftp down the same boot image concurrently. Note: the Ethernet
driver in use must provide a function: mcast() to join/leave a
multicast group.
- BOOTP Recovery Mode:
CONFIG_BOOTP_RANDOM_DELAY

6
drivers/net/rtl8139.c
View File

@ -183,12 +183,10 @@ static void rtl_reset(struct eth_device *dev);
static int rtl_transmit(struct eth_device *dev, void *packet, int length);
static int rtl_poll(struct eth_device *dev);
static void rtl_disable(struct eth_device *dev);
#ifdef CONFIG_MCAST_TFTP/* This driver already accepts all b/mcast */
static int rtl_bcast_addr(struct eth_device *dev, const u8 *bcast_mac, u8 set)
static int rtl_bcast_addr(struct eth_device *dev, const u8 *bcast_mac, int join)
{
return (0);
}
#endif
static struct pci_device_id supported[] = {
{PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139},
@ -229,9 +227,7 @@ int rtl8139_initialize(bd_t *bis)
dev->halt = rtl_disable;
dev->send = rtl_transmit;
dev->recv = rtl_poll;
#ifdef CONFIG_MCAST_TFTP
dev->mcast = rtl_bcast_addr;
#endif
eth_register (dev);

14
drivers/net/tsec.c
View File

@ -78,8 +78,6 @@ static void tsec_configure_serdes(struct tsec_private *priv)
0, TBI_CR, CONFIG_TSEC_TBICR_SETTINGS);
}
#ifdef CONFIG_MCAST_TFTP
/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
* and this is the ethernet-crc method needed for TSEC -- and perhaps
* some other adapter -- hash tables
@ -124,9 +122,10 @@ static u32 ether_crc(size_t len, unsigned char const *p)
* the entry.
*/
#ifndef CONFIG_DM_ETH
static int tsec_mcast_addr(struct eth_device *dev, const u8 *mcast_mac, u8 set)
static int tsec_mcast_addr(struct eth_device *dev, const u8 *mcast_mac,
int join)
#else
static int tsec_mcast_addr(struct udevice *dev, const u8 *mcast_mac, int set)
static int tsec_mcast_addr(struct udevice *dev, const u8 *mcast_mac, int join)
#endif
{
struct tsec_private *priv = (struct tsec_private *)dev->priv;
@ -140,14 +139,13 @@ static int tsec_mcast_addr(struct udevice *dev, const u8 *mcast_mac, int set)
value = BIT(31 - whichbit);
if (set)
if (join)
setbits_be32(&regs->hash.gaddr0 + whichreg, value);
else
clrbits_be32(&regs->hash.gaddr0 + whichreg, value);
return 0;
}
#endif /* Multicast TFTP ? */
/*
* Initialized required registers to appropriate values, zeroing
@ -745,9 +743,7 @@ static int tsec_initialize(bd_t *bis, struct tsec_info_struct *tsec_info)
dev->halt = tsec_halt;
dev->send = tsec_send;
dev->recv = tsec_recv;
#ifdef CONFIG_MCAST_TFTP
dev->mcast = tsec_mcast_addr;
#endif
/* Tell U-Boot to get the addr from the env */
for (i = 0; i < 6; i++)
@ -887,9 +883,7 @@ static const struct eth_ops tsec_ops = {
.recv = tsec_recv,
.free_pkt = tsec_free_pkt,
.stop = tsec_halt,
#ifdef CONFIG_MCAST_TFTP
.mcast = tsec_mcast_addr,
#endif
};
static const struct udevice_id tsec_ids[] = {

3
drivers/usb/gadget/ether.c
View File

@ -2579,9 +2579,6 @@ int usb_eth_initialize(bd_t *bi)
netdev->halt = usb_eth_halt;
netdev->priv = l_priv;
#ifdef CONFIG_MCAST_TFTP
#error not supported
#endif
eth_register(netdev);
return 0;
}

14
include/net.h
View File

@ -140,9 +140,7 @@ struct eth_ops {
int (*recv)(struct udevice *dev, int flags, uchar **packetp);
int (*free_pkt)(struct udevice *dev, uchar *packet, int length);
void (*stop)(struct udevice *dev);
#ifdef CONFIG_MCAST_TFTP
int (*mcast)(struct udevice *dev, const u8 *enetaddr, int join);
#endif
int (*write_hwaddr)(struct udevice *dev);
int (*read_rom_hwaddr)(struct udevice *dev);
};
@ -175,9 +173,7 @@ struct eth_device {
int (*send)(struct eth_device *, void *packet, int length);
int (*recv)(struct eth_device *);
void (*halt)(struct eth_device *);
#ifdef CONFIG_MCAST_TFTP
int (*mcast)(struct eth_device *, const u8 *enetaddr, u8 set);
#endif
int (*mcast)(struct eth_device *, const u8 *enetaddr, int join);
int (*write_hwaddr)(struct eth_device *);
struct eth_device *next;
int index;
@ -286,11 +282,7 @@ extern void (*push_packet)(void *packet, int length);
int eth_rx(void); /* Check for received packets */
void eth_halt(void); /* stop SCC */
const char *eth_get_name(void); /* get name of current device */
#ifdef CONFIG_MCAST_TFTP
int eth_mcast_join(struct in_addr mcast_addr, int join);
#endif
/**********************************************************************/
/*
@ -577,10 +569,6 @@ extern struct in_addr net_ntp_server; /* the ip address to NTP */
extern int net_ntp_time_offset; /* offset time from UTC */
#endif
#if defined(CONFIG_MCAST_TFTP)
extern struct in_addr net_mcast_addr;
#endif
/* Initialize the network adapter */
void net_init(void);
int net_loop(enum proto_t);

2
net/eth-uclass.c
View File

@ -476,10 +476,8 @@ static int eth_post_probe(struct udevice *dev)
ops->free_pkt += gd->reloc_off;
if (ops->stop)
ops->stop += gd->reloc_off;
#ifdef CONFIG_MCAST_TFTP
if (ops->mcast)
ops->mcast += gd->reloc_off;
#endif
if (ops->write_hwaddr)
ops->write_hwaddr += gd->reloc_off;
if (ops->read_rom_hwaddr)

4
net/eth_legacy.c
View File

@ -291,7 +291,6 @@ int eth_initialize(void)
return num_devices;
}
#ifdef CONFIG_MCAST_TFTP
/* Multicast.
* mcast_addr: multicast ipaddr from which multicast Mac is made
* join: 1=join, 0=leave.
@ -310,9 +309,6 @@ int eth_mcast_join(struct in_addr mcast_ip, int join)
return eth_current->mcast(eth_current, mcast_mac, join);
}
#endif
int eth_init(void)
{
struct eth_device *old_current;

7
net/net.c
View File

@ -131,10 +131,6 @@ struct in_addr net_dns_server;
struct in_addr net_dns_server2;
#endif
#ifdef CONFIG_MCAST_TFTP /* Multicast TFTP */
struct in_addr net_mcast_addr;
#endif
/** END OF BOOTP EXTENTIONS **/
/* Our ethernet address */
@ -1216,9 +1212,6 @@ void net_process_received_packet(uchar *in_packet, int len)
dst_ip = net_read_ip(&ip->ip_dst);
if (net_ip.s_addr && dst_ip.s_addr != net_ip.s_addr &&
dst_ip.s_addr != 0xFFFFFFFF) {
#ifdef CONFIG_MCAST_TFTP
if (net_mcast_addr != dst_ip)
#endif
return;
}
/* Read source IP address for later use */

219
net/tftp.c
View File

@ -140,36 +140,6 @@ static char tftp_filename[MAX_LEN];
static unsigned short tftp_block_size = TFTP_BLOCK_SIZE;
static unsigned short tftp_block_size_option = TFTP_MTU_BLOCKSIZE;
#ifdef CONFIG_MCAST_TFTP
#include <malloc.h>
#define MTFTP_BITMAPSIZE 0x1000
static unsigned *tftp_mcast_bitmap;
static int tftp_mcast_prev_hole;
static int tftp_mcast_bitmap_size = MTFTP_BITMAPSIZE;
static int tftp_mcast_disabled;
static int tftp_mcast_master_client;
static int tftp_mcast_active;
static int tftp_mcast_port;
/* can get 'last' block before done..*/
static ulong tftp_mcast_ending_block;
static void parse_multicast_oack(char *pkt, int len);
static void mcast_cleanup(void)
{
if (net_mcast_addr)
eth_mcast_join(net_mcast_addr, 0);
if (tftp_mcast_bitmap)
free(tftp_mcast_bitmap);
tftp_mcast_bitmap = NULL;
net_mcast_addr.s_addr = 0;
tftp_mcast_active = 0;
tftp_mcast_port = 0;
tftp_mcast_ending_block = -1;
}
#endif /* CONFIG_MCAST_TFTP */
static inline int store_block(int block, uchar *src, unsigned int len)
{
ulong offset = block * tftp_block_size + tftp_block_wrap_offset;
@ -211,10 +181,6 @@ static inline int store_block(int block, uchar *src, unsigned int len)
memcpy(ptr, src, len);
unmap_sysmem(ptr);
}
#ifdef CONFIG_MCAST_TFTP
if (tftp_mcast_active)
ext2_set_bit(block, tftp_mcast_bitmap);
#endif
if (net_boot_file_size < newsize)
net_boot_file_size = newsize;
@ -292,9 +258,6 @@ static void show_block_marker(void)
static void restart(const char *msg)
{
printf("\n%s; starting again\n", msg);
#ifdef CONFIG_MCAST_TFTP
mcast_cleanup();
#endif
net_start_again();
}
@ -349,12 +312,6 @@ static void tftp_send(void)
int len = 0;
ushort *s;
#ifdef CONFIG_MCAST_TFTP
/* Multicast TFTP.. non-MasterClients do not ACK data. */
if (tftp_mcast_active && tftp_state == STATE_DATA &&
tftp_mcast_master_client == 0)
return;
#endif
/*
* We will always be sending some sort of packet, so
* cobble together the packet headers now.
@ -389,30 +346,10 @@ static void tftp_send(void)
/* try for more effic. blk size */
pkt += sprintf((char *)pkt, "blksize%c%d%c",
0, tftp_block_size_option, 0);
#ifdef CONFIG_MCAST_TFTP
/* Check all preconditions before even trying the option */
if (!tftp_mcast_disabled) {
tftp_mcast_bitmap = malloc(tftp_mcast_bitmap_size);
if (tftp_mcast_bitmap && eth_get_dev()->mcast) {
free(tftp_mcast_bitmap);
tftp_mcast_bitmap = NULL;
pkt += sprintf((char *)pkt, "multicast%c%c",
0, 0);
}
}
#endif /* CONFIG_MCAST_TFTP */
len = pkt - xp;
break;
case STATE_OACK:
#ifdef CONFIG_MCAST_TFTP
/* My turn! Start at where I need blocks I missed. */
if (tftp_mcast_active)
tftp_cur_block = ext2_find_next_zero_bit(
tftp_mcast_bitmap,
tftp_mcast_bitmap_size * 8, 0);
/* fall through */
#endif
case STATE_RECV_WRQ:
case STATE_DATA:
@ -482,10 +419,6 @@ static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
int i;
if (dest != tftp_our_port) {
#ifdef CONFIG_MCAST_TFTP
if (tftp_mcast_active &&
(!tftp_mcast_port || dest != tftp_mcast_port))
#endif
return;
}
if (tftp_state != STATE_SEND_RRQ && src != tftp_remote_port &&
@ -566,12 +499,6 @@ static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
}
#endif
}
#ifdef CONFIG_MCAST_TFTP
parse_multicast_oack((char *)pkt, len - 1);
if ((tftp_mcast_active) && (!tftp_mcast_master_client))
tftp_state = STATE_DATA; /* passive.. */
else
#endif
#ifdef CONFIG_CMD_TFTPPUT
if (tftp_put_active) {
/* Get ready to send the first block */
@ -599,11 +526,6 @@ static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
tftp_remote_port = src;
new_transfer();
#ifdef CONFIG_MCAST_TFTP
if (tftp_mcast_active) { /* start!=1 common if mcast */
tftp_prev_block = tftp_cur_block - 1;
} else
#endif
if (tftp_cur_block != 1) { /* Assertion */
puts("\nTFTP error: ");
printf("First block is not block 1 (%ld)\n",
@ -633,44 +555,8 @@ static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
* Acknowledge the block just received, which will prompt
* the remote for the next one.
*/
#ifdef CONFIG_MCAST_TFTP
/* if I am the MasterClient, actively calculate what my next
* needed block is; else I'm passive; not ACKING
*/
if (tftp_mcast_active) {
if (len < tftp_block_size) {
tftp_mcast_ending_block = tftp_cur_block;
} else if (tftp_mcast_master_client) {
tftp_mcast_prev_hole = ext2_find_next_zero_bit(
tftp_mcast_bitmap,
tftp_mcast_bitmap_size * 8,
tftp_mcast_prev_hole);
tftp_cur_block = tftp_mcast_prev_hole;
if (tftp_cur_block >
((tftp_mcast_bitmap_size * 8) - 1)) {
debug("tftpfile too big\n");
/* try to double it and retry */
tftp_mcast_bitmap_size <<= 1;
mcast_cleanup();
net_start_again();
return;
}
tftp_prev_block = tftp_cur_block;
}
}
#endif
tftp_send();
#ifdef CONFIG_MCAST_TFTP
if (tftp_mcast_active) {
if (tftp_mcast_master_client &&
(tftp_cur_block >= tftp_mcast_ending_block)) {
puts("\nMulticast tftp done\n");
mcast_cleanup();
net_set_state(NETLOOP_SUCCESS);
}
} else
#endif
if (len < tftp_block_size)
tftp_complete();
break;
@ -693,9 +579,6 @@ static void tftp_handler(uchar *pkt, unsigned dest, struct in_addr sip,
case TFTP_ERR_FILE_ALREADY_EXISTS:
default:
puts("Starting again\n\n");
#ifdef CONFIG_MCAST_TFTP
mcast_cleanup();
#endif
net_start_again();
break;
}
@ -873,9 +756,6 @@ void tftp_start(enum proto_t protocol)
memset(net_server_ethaddr, 0, 6);
/* Revert tftp_block_size to dflt */
tftp_block_size = TFTP_BLOCK_SIZE;
#ifdef CONFIG_MCAST_TFTP
mcast_cleanup();
#endif
#ifdef CONFIG_TFTP_TSIZE
tftp_tsize = 0;
tftp_tsize_num_hash = 0;
@ -924,102 +804,3 @@ void tftp_start_server(void)
}
#endif /* CONFIG_CMD_TFTPSRV */
#ifdef CONFIG_MCAST_TFTP
/*
* Credits: atftp project.
*/
/*
* Pick up BcastAddr, Port, and whether I am [now] the master-client.
* Frame:
* +-------+-----------+---+-------~~-------+---+
* | opc | multicast | 0 | addr, port, mc | 0 |
* +-------+-----------+---+-------~~-------+---+
* The multicast addr/port becomes what I listen to, and if 'mc' is '1' then
* I am the new master-client so must send ACKs to DataBlocks. If I am not
* master-client, I'm a passive client, gathering what DataBlocks I may and
* making note of which ones I got in my bitmask.
* In theory, I never go from master->passive..
* .. this comes in with pkt already pointing just past opc
*/
static void parse_multicast_oack(char *pkt, int len)
{
int i;
struct in_addr addr;
char *mc_adr;
char *port;
char *mc;
mc_adr = NULL;
port = NULL;
mc = NULL;
/* march along looking for 'multicast\0', which has to start at least
* 14 bytes back from the end.
*/
for (i = 0; i < len - 14; i++)
if (strcmp(pkt + i, "multicast") == 0)
break;
if (i >= (len - 14)) /* non-Multicast OACK, ign. */
return;
i += 10; /* strlen multicast */
mc_adr = pkt + i;
for (; i < len; i++) {
if (*(pkt + i) == ',') {
*(pkt + i) = '\0';
if (port) {
mc = pkt + i + 1;
break;
} else {
port = pkt + i + 1;
}
}
}
if (!port || !mc_adr || !mc)
return;
if (tftp_mcast_active && tftp_mcast_master_client) {
printf("I got a OACK as master Client, WRONG!\n");
return;
}
/* ..I now accept packets destined for this MCAST addr, port */
if (!tftp_mcast_active) {
if (tftp_mcast_bitmap) {
printf("Internal failure! no mcast.\n");
free(tftp_mcast_bitmap);
tftp_mcast_bitmap = NULL;
tftp_mcast_disabled = 1;
return;
}
/* I malloc instead of pre-declare; so that if the file ends
* up being too big for this bitmap I can retry
*/
tftp_mcast_bitmap = malloc(tftp_mcast_bitmap_size);
if (!tftp_mcast_bitmap) {
printf("No bitmap, no multicast. Sorry.\n");
tftp_mcast_disabled = 1;
return;
}
memset(tftp_mcast_bitmap, 0, tftp_mcast_bitmap_size);
tftp_mcast_prev_hole = 0;
tftp_mcast_active = 1;
}
addr = string_to_ip(mc_adr);
if (net_mcast_addr.s_addr != addr.s_addr) {
if (net_mcast_addr.s_addr)
eth_mcast_join(net_mcast_addr, 0);
net_mcast_addr = addr;
if (eth_mcast_join(net_mcast_addr, 1)) {
printf("Fail to set mcast, revert to TFTP\n");
tftp_mcast_disabled = 1;
mcast_cleanup();
net_start_again();
}
}
tftp_mcast_master_client = simple_strtoul((char *)mc, NULL, 10);
tftp_mcast_port = (unsigned short)simple_strtoul(port, NULL, 10);
printf("Multicast: %s:%d [%d]\n", mc_adr, tftp_mcast_port,
tftp_mcast_master_client);
return;
}
#endif /* Multicast TFTP */

1
scripts/config_whitelist.txt
View File

@ -1198,7 +1198,6 @@ CONFIG_MAX_FPGA_DEVICES
CONFIG_MAX_MEM_MAPPED
CONFIG_MAX_PKT
CONFIG_MAX_RAM_BANK_SIZE
CONFIG_MCAST_TFTP
CONFIG_MCF5249
CONFIG_MCF5253
CONFIG_MCFFEC