udhcp: code shrink

function                                             old     new   delta
attach_option                                        406     349     -57

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c
index 41b05b8555f1becbfeee52b2c6d34b2dd498d68f..4c2221b77fb93fd67470bf5ac2dcad4898840369 100644 (file)
--- a/networking/udhcp/common.c
+++ b/networking/udhcp/common.c
@@ -422,6 +422,7 @@ static NOINLINE void attach_option(
                if (errno)
                        bb_error_msg_and_die("malformed hex string '%s'", buffer);
                length = end - allocated;
+               buffer = allocated;
        }
 #if ENABLE_FEATURE_UDHCP_RFC3397
        if ((optflag->flags & OPTION_TYPE_MASK) == OPTION_DNS_STRING) {
@@ -441,15 +442,14 @@ static NOINLINE void attach_option(
                        new->data = xmalloc(length + OPT_DATA);
                        new->data[OPT_CODE] = optflag->code;
                        new->data[OPT_LEN] = length;
-                       memcpy(new->data + OPT_DATA, (allocated ? allocated : buffer),
-                                       length);
+                       memcpy(new->data + OPT_DATA, buffer, length);
                } else {
                        new->data = xmalloc(length + D6_OPT_DATA);
                        new->data[D6_OPT_CODE] = optflag->code >> 8;
                        new->data[D6_OPT_CODE + 1] = optflag->code & 0xff;
                        new->data[D6_OPT_LEN] = length >> 8;
                        new->data[D6_OPT_LEN + 1] = length & 0xff;
-                       memcpy(new->data + D6_OPT_DATA, (allocated ? allocated : buffer),
+                       memcpy(new->data + D6_OPT_DATA, buffer,
                                        length);
                }
 
@@ -472,6 +472,8 @@ static NOINLINE void attach_option(
                        /* actually 255 is ok too, but adding a space can overlow it */
 
                        existing->data = xrealloc(existing->data, OPT_DATA + 1 + old_len + length);
+// So far dhcp_optflags[] has no OPTION_STRING[_HOST] | OPTION_LIST items
+#if 0
                        if ((optflag->flags & OPTION_TYPE_MASK) == OPTION_STRING
                         || (optflag->flags & OPTION_TYPE_MASK) == OPTION_STRING_HOST
                        ) {
@@ -479,7 +481,9 @@ static NOINLINE void attach_option(
                                existing->data[OPT_DATA + old_len] = ' ';
                                old_len++;
                        }
-                       memcpy(existing->data + OPT_DATA + old_len, (allocated ? allocated : buffer), length);
+#endif
+
+                       memcpy(existing->data + OPT_DATA + old_len, buffer, length);
                        existing->data[OPT_LEN] = old_len + length;
                } /* else, ignore the data, we could put this in a second option in the future */
        } /* else, ignore the new data */
@@ -553,7 +557,7 @@ int FAST_FUNC udhcp_str2optset(const char *const_str, void *arg,
                        if (retval)
                                retval = udhcp_str2nip(val, buffer + 4);
                        break;
-case_OPTION_STRING:
+ case_OPTION_STRING:
                case OPTION_STRING:
                case OPTION_STRING_HOST:
 #if ENABLE_FEATURE_UDHCP_RFC3397