diff options
| author | Alexander Graf <agraf@suse.de> | 2018-06-15 10:29:27 +0200 |
|---|---|---|
| committer | Joe Hershberger <joe.hershberger@ni.com> | 2018-07-02 14:14:20 -0500 |
| commit | 449312c1c0c686ad28c51e6429d8bbdd13812b10 (patch) | |
| tree | 785178cef0d557e6220d5de543c37add091c37c4 /net | |
| parent | d8970dae276377a0beff1c3e9d8b6f805ecf5cd5 (diff) | |
net: Prefer command line arguments
We can call commands like dhcp and bootp without arguments or with
explicit command line arguments that really should tell the code where
to look for files instead.
Unfortunately, the current code simply overwrites command line arguments
in the dhcp case with dhcp values.
This patch allows the code to preserve the command line values if they
were set on the command line. That way the semantics are slightly more
intuitive.
The reason this patch does that by introducing a new variable is that we
can not rely on net_boot_file_name[0] being unset, as today it's
completely legal to call "dhcp" and afterwards run "tftp" and expect the
latter to repeat the same query as before. I would prefer not to break
that behavior in case anyone relies on it.
Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bootp.c | 14 | ||||
| -rw-r--r-- | net/net.c | 2 |
2 files changed, 11 insertions, 5 deletions
diff --git a/net/bootp.c b/net/bootp.c index 9d7cb5d30c..fdcb4374a0 100644 --- a/net/bootp.c +++ b/net/bootp.c @@ -157,7 +157,8 @@ static void store_net_params(struct bootp_hdr *bp) #if defined(CONFIG_CMD_DHCP) !(dhcp_option_overload & OVERLOAD_FILE) && #endif - (strlen(bp->bp_file) > 0)) { + (strlen(bp->bp_file) > 0) && + !net_boot_file_name_explicit) { copy_filename(net_boot_file_name, bp->bp_file, sizeof(net_boot_file_name)); } @@ -889,10 +890,13 @@ static void dhcp_process_options(uchar *popt, uchar *end) case 66: /* Ignore TFTP server name */ break; case 67: /* Bootfile option */ - size = truncate_sz("Bootfile", - sizeof(net_boot_file_name), oplen); - memcpy(&net_boot_file_name, popt + 2, size); - net_boot_file_name[size] = 0; + if (!net_boot_file_name_explicit) { + size = truncate_sz("Bootfile", + sizeof(net_boot_file_name), + oplen); + memcpy(&net_boot_file_name, popt + 2, size); + net_boot_file_name[size] = 0; + } break; default: #if defined(CONFIG_BOOTP_VENDOREX) @@ -174,6 +174,8 @@ ushort net_native_vlan = 0xFFFF; /* Boot File name */ char net_boot_file_name[1024]; +/* Indicates whether the file name was specified on the command line */ +bool net_boot_file_name_explicit; /* The actual transferred size of the bootfile (in bytes) */ u32 net_boot_file_size; /* Boot file size in blocks as reported by the DHCP server */ |