802.11: no need for an element ID in the structures for IEs.

Remove the element_id member, and, instead of copying over the entire IE
header, just set the length to the value we've already fetched.

diff --git a/print-802_11.c b/print-802_11.c
index a3ce42734ca3c3127d00971476d644a2e4341254..0303e2869c92841e051d2caee0c37d28a77e2bd3 100644 (file)
--- a/print-802_11.c
+++ b/print-802_11.c
@@ -193,25 +193,21 @@ struct mgmt_header_t {
 #define        CAPABILITY_PRIVACY(cap) ((cap) & 0x0010)
 
 struct ssid_t {
-       uint8_t         element_id;
        uint8_t         length;
        u_char          ssid[33];  /* 32 + 1 for null */
 };
 
 struct rates_t {
-       uint8_t         element_id;
        uint8_t         length;
        uint8_t         rate[16];
 };
 
 struct challenge_t {
-       uint8_t         element_id;
        uint8_t         length;
        uint8_t         text[254]; /* 1-253 + 1 for null */
 };
 
 struct fh_t {
-       uint8_t         element_id;
        uint8_t         length;
        uint16_t        dwell_time;
        uint8_t         hop_set;
@@ -220,13 +216,11 @@ struct fh_t {
 };
 
 struct ds_t {
-       uint8_t         element_id;
        uint8_t         length;
        uint8_t         channel;
 };
 
 struct cf_t {
-       uint8_t         element_id;
        uint8_t         length;
        uint8_t         count;
        uint8_t         period;
@@ -235,7 +229,6 @@ struct cf_t {
 };
 
 struct tim_t {
-       uint8_t         element_id;
        uint8_t         length;
        uint8_t         count;
        uint8_t         period;
@@ -1170,7 +1163,7 @@ parse_elements(netdissect_options *ndo,
 
                switch (GET_U_1(p + offset)) {
                case E_SSID:
-                       memcpy(&ssid, p + offset, 2);
+                       ssid.length = elementlen;
                        offset += 2;
                        length -= 2;
                        if (ssid.length != 0) {
@@ -1194,7 +1187,7 @@ parse_elements(netdissect_options *ndo,
                        }
                        break;
                case E_CHALLENGE:
-                       memcpy(&challenge, p + offset, 2);
+                       challenge.length = elementlen;
                        offset += 2;
                        length -= 2;
                        if (challenge.length != 0) {
@@ -1220,7 +1213,7 @@ parse_elements(netdissect_options *ndo,
                        }
                        break;
                case E_RATES:
-                       memcpy(&rates, p + offset, 2);
+                       rates.length = elementlen;
                        offset += 2;
                        length -= 2;
                        if (rates.length != 0) {
@@ -1252,7 +1245,7 @@ parse_elements(netdissect_options *ndo,
                        }
                        break;
                case E_DS:
-                       memcpy(&ds, p + offset, 2);
+                       ds.length = elementlen;
                        offset += 2;
                        length -= 2;
                        if (ds.length != 1) {
@@ -1276,7 +1269,7 @@ parse_elements(netdissect_options *ndo,
                        }
                        break;
                case E_CF:
-                       memcpy(&cf, p + offset, 2);
+                       cf.length = elementlen;
                        offset += 2;
                        length -= 2;
                        if (cf.length != 6) {
@@ -1300,7 +1293,7 @@ parse_elements(netdissect_options *ndo,
                        }
                        break;
                case E_TIM:
-                       memcpy(&tim, p + offset, 2);
+                       tim.length = elementlen;
                        offset += 2;
                        length -= 2;
                        if (tim.length <= 3U) {