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authorSamuel Mendoza-Jonas <sam@mendozajonas.com>2018-05-14 04:29:11 (GMT)
committerDenys Vlasenko <vda.linux@googlemail.com>2018-05-14 08:46:00 (GMT)
commitbcdec1a8b8bf9fb3ea4de96d153b203e12e035fd (patch)
tree332059063249009610ee676388392099606a0a74
parent43b9235f66aa56bb884c13443d9e7d56003b5c36 (diff)
downloadbusybox-bcdec1a8b8bf9fb3ea4de96d153b203e12e035fd.tar.gz
busybox-bcdec1a8b8bf9fb3ea4de96d153b203e12e035fd.tar.bz2
udhcpc6: add DHCPv6 env helper
Add string_option_to_env() to easily generate environment variables for known simple options. Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--networking/udhcp/d6_dhcpc.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/networking/udhcp/d6_dhcpc.c b/networking/udhcp/d6_dhcpc.c
index 85d9da7..fa1568b 100644
--- a/networking/udhcp/d6_dhcpc.c
+++ b/networking/udhcp/d6_dhcpc.c
@@ -195,6 +195,34 @@ static char** new_env(void)
return &client6_data.env_ptr[client6_data.env_idx++];
}
+static char *string_option_to_env(uint8_t *option, uint8_t *option_end)
+{
+ const char *ptr, *name = NULL;
+ unsigned val_len;
+ int i;
+
+ ptr = d6_option_strings;
+ i = 0;
+ while (*ptr) {
+ if (d6_optflags[i].code == option[1]) {
+ name = ptr;
+ goto found;
+ }
+ ptr += strlen(ptr) + 1;
+ i++;
+ }
+ bb_error_msg("can't find option name for 0x%x, skipping", option[1]);
+ return NULL;
+
+ found:
+ val_len = (option[2] << 8) | option[3];
+ if (val_len + &option[D6_OPT_DATA] > option_end) {
+ bb_error_msg("option data exceeds option length");
+ return NULL;
+ }
+ return xasprintf("%s=%.*s", name, val_len, (char*)option + 4);
+}
+
/* put all the parameters into the environment */
static void option_to_env(uint8_t *option, uint8_t *option_end)
{