Finally finished FID4 Transmission Header decoding.
svn path=/trunk/; revision=890
This commit is contained in:
Gilbert Ramirez
parent
f50168c85d
commit
984d9b8988
235
packet-sna.c
235
packet-sna.c
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@ -2,7 +2,7 @@
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* Routines for SNA
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* Gilbert Ramirez <gram@xiexie.org>
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*
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* $Id: packet-sna.c,v 1.3 1999/10/18 12:41:37 gram Exp $
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* $Id: packet-sna.c,v 1.4 1999/10/20 05:19:50 gram Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@unicom.net>
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@ -65,6 +65,20 @@ static int hf_sna_th_nlp_cp = -1;
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static int hf_sna_th_ern = -1;
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static int hf_sna_th_vrn = -1;
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static int hf_sna_th_tpf = -1;
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static int hf_sna_th_vr_cwi = -1;
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static int hf_sna_th_tg_nonfifo_ind = -1;
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static int hf_sna_th_vr_sqti = -1;
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static int hf_sna_th_tg_snf = -1;
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static int hf_sna_th_vrprq = -1;
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static int hf_sna_th_vrprs = -1;
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static int hf_sna_th_vr_cwri = -1;
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static int hf_sna_th_vr_rwi = -1;
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static int hf_sna_th_vr_snf_send = -1;
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static int hf_sna_th_dsaf = -1;
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static int hf_sna_th_osaf = -1;
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static int hf_sna_th_snai = -1;
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static int hf_sna_th_def = -1;
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static int hf_sna_th_oef = -1;
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static int hf_sna_rh = -1;
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static int hf_sna_rh_0 = -1;
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@ -225,6 +239,47 @@ static const value_string sna_th_tpf_vals[] = {
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{ 0x10, "High Priority" },
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};
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/* VR_CWI */
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static const value_string sna_th_vr_cwi_vals[] = {
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{ 0x0, "Increment window size" },
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{ 0x1, "Decrement window size" },
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};
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/* TG_NONFIFO_IND */
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static const true_false_string sna_th_tg_nonfifo_ind_truth =
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{ "TG FIFO is not required", "TG FIFO is required" };
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/* VR_SQTI */
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static const value_string sna_th_vr_sqti_vals[] = {
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{ 0x00, "Non-sequenced, Non-supervisory" },
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{ 0x01, "Non-sequenced, Supervisory" },
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{ 0x10, "Singly-sequenced" },
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};
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/* VRPRQ */
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static const true_false_string sna_th_vrprq_truth = {
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"VR pacing request is sent asking for a VR pacing response",
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"No VR pacing response is requested",
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};
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/* VRPRS */
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static const true_false_string sna_th_vrprs_truth = {
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"VR pacing response is sent in response to a VRPRQ bit set",
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"No pacing response sent",
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};
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/* VR_CWRI */
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static const value_string sna_th_vr_cwri_vals[] = {
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{ 0, "Increment window size by 1" },
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{ 1, "Decrement window size by 1" },
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};
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/* VR_RWI */
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static const true_false_string sna_th_vr_rwi_truth = {
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"Reset window size to the minimum specified in NC_ACTVR",
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"Do not reset window size",
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};
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static int dissect_fid0_1 (const u_char*, int, frame_data*, proto_tree*);
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static int dissect_fid2 (const u_char*, int, frame_data*, proto_tree*);
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static int dissect_fid3 (const u_char*, int, frame_data*, proto_tree*);
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@ -472,6 +527,8 @@ dissect_fid4 (const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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proto_item *bf_item;
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guint8 th_byte, mft;
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guint16 th_word;
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guint16 def, oef, snf, dcf;
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guint32 dsaf, osaf;
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static int bytes_in_header = 26;
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@ -479,11 +536,28 @@ dissect_fid4 (const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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return 0;
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}
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dsaf = pntohl(&pd[offset+8]);
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osaf = pntohl(&pd[offset+12]);
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def = pntohs(&pd[offset+18]);
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oef = pntohs(&pd[offset+20]);
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snf = pntohs(&pd[offset+22]);
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dcf = pntohs(&pd[offset+24]);
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/* Addresses in FID 2 are FT_UINT8 */
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if (check_col(fd, COL_RES_NET_DST))
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col_add_fstr(fd, COL_RES_NET_DST, "%08X.%04X", dsaf, def);
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if (check_col(fd, COL_UNRES_NET_DST))
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col_add_fstr(fd, COL_UNRES_NET_DST, "%08X.%04X", dsaf, def);
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if (check_col(fd, COL_RES_NET_SRC))
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col_add_fstr(fd, COL_RES_NET_SRC, "%08X.%04X", osaf, oef);
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if (check_col(fd, COL_RES_NET_SRC))
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col_add_fstr(fd, COL_UNRES_NET_SRC, "%08X.%04X", osaf, oef);
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if (!tree) {
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return bytes_in_header;
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}
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th_byte = pd[offset+0];
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th_byte = pd[offset];
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/* Create the bitfield tree */
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bf_item = proto_tree_add_item(tree, hf_sna_th_0, offset, 1, th_byte);
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@ -496,7 +570,12 @@ dissect_fid4 (const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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proto_tree_add_item(bf_tree, hf_sna_th_vr_pac_cnt_ind, offset, 1, th_byte);
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proto_tree_add_item(bf_tree, hf_sna_th_ntwk_prty, offset, 1, th_byte);
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th_byte = pd[offset+1];
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offset += 1;
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th_byte = pd[offset];
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/* Create the bitfield tree */
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bf_item = proto_tree_add_text(tree, offset, 1, "Transmision Header Byte 1");
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bf_tree = proto_item_add_subtree(bf_item, ETT_SNA_TH_FID);
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/* Byte 1 */
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proto_tree_add_item(bf_tree, hf_sna_th_tgsf, offset, 1, th_byte);
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@ -504,7 +583,12 @@ dissect_fid4 (const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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proto_tree_add_item(bf_tree, hf_sna_th_piubf, offset, 1, th_byte);
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mft = th_byte & 0x04;
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th_byte = pd[offset+2];
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offset += 1;
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th_byte = pd[offset];
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/* Create the bitfield tree */
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bf_item = proto_tree_add_text(tree, offset, 1, "Transmision Header Byte 2");
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bf_tree = proto_item_add_subtree(bf_item, ETT_SNA_TH_FID);
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/* Byte 2 */
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if (mft) {
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@ -515,16 +599,85 @@ dissect_fid4 (const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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proto_tree_add_item(bf_tree, hf_sna_th_iern, offset, 1, th_byte);
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}
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proto_tree_add_item(bf_tree, hf_sna_th_ern, offset, 1, th_byte);
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th_byte = pd[offset+3];
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offset += 1;
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th_byte = pd[offset];
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/* Create the bitfield tree */
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bf_item = proto_tree_add_text(tree, offset, 1, "Transmision Header Byte 3");
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bf_tree = proto_item_add_subtree(bf_item, ETT_SNA_TH_FID);
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/* Byte 3 */
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proto_tree_add_item(bf_tree, hf_sna_th_vrn, offset, 1, th_byte);
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proto_tree_add_item(bf_tree, hf_sna_th_tpf, offset, 1, th_byte);
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th_word = pntohs(&pd[offset+4]);
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offset += 1;
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th_word = pntohs(&pd[offset]);
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/* Create the bitfield tree */
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bf_item = proto_tree_add_text(tree, offset, 2, "Transmision Header Bytes 4-5");
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bf_tree = proto_item_add_subtree(bf_item, ETT_SNA_TH_FID);
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/* Bytes 4-5 */
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proto_tree_add_item(bf_tree, hf_sna_th_vr_cwi, offset, 2, th_word);
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proto_tree_add_item(bf_tree, hf_sna_th_tg_nonfifo_ind, offset, 2, th_word);
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proto_tree_add_item(bf_tree, hf_sna_th_vr_sqti, offset, 2, th_word);
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/* I'm not sure about byte-order on this one... */
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proto_tree_add_item(bf_tree, hf_sna_th_tg_snf, offset, 2, th_word);
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offset += 2;
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th_word = pntohs(&pd[offset]);
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/* Create the bitfield tree */
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bf_item = proto_tree_add_text(tree, offset, 2, "Transmision Header Bytes 6-7");
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bf_tree = proto_item_add_subtree(bf_item, ETT_SNA_TH_FID);
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/* Bytes 6-7 */
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proto_tree_add_item(bf_tree, hf_sna_th_vrprq, offset, 2, th_word);
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proto_tree_add_item(bf_tree, hf_sna_th_vrprs, offset, 2, th_word);
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proto_tree_add_item(bf_tree, hf_sna_th_vr_cwri, offset, 2, th_word);
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proto_tree_add_item(bf_tree, hf_sna_th_vr_rwi, offset, 2, th_word);
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/* I'm not sure about byte-order on this one... */
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proto_tree_add_item(bf_tree, hf_sna_th_vr_snf_send, offset, 2, th_word);
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offset += 2;
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/* Bytes 8-11 */
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proto_tree_add_item(tree, hf_sna_th_dsaf, offset, 4, dsaf);
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offset += 4;
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/* Bytes 12-15 */
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proto_tree_add_item(tree, hf_sna_th_osaf, offset, 4, osaf);
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offset += 4;
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th_byte = pd[offset];
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/* Create the bitfield tree */
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bf_item = proto_tree_add_text(tree, offset, 2, "Transmision Header Byte 16");
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bf_tree = proto_item_add_subtree(bf_item, ETT_SNA_TH_FID);
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/* Byte 16 */
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proto_tree_add_item(tree, hf_sna_th_snai, offset, 1, th_byte);
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/* We luck out here because in their infinite wisdom the SNA
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* architects placed the MPF and EFI fields in the same bitfield
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* locations, even though for FID4 they're not in byte 0.
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* Thank you IBM! */
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proto_tree_add_item(tree, hf_sna_th_mpf, offset, 1, th_byte);
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proto_tree_add_item(tree, hf_sna_th_efi, offset, 1, th_byte);
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offset += 2; /* 1 for byte 16, 1 for byte 17 which is reserved */
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/* Bytes 18-25 */
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proto_tree_add_item(tree, hf_sna_th_def, offset+0, 2, def);
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proto_tree_add_item(tree, hf_sna_th_oef, offset+2, 2, oef);
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proto_tree_add_item(tree, hf_sna_th_snf, offset+4, 2, snf);
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proto_tree_add_item(tree, hf_sna_th_snf, offset+6, 2, dcf);
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g_assert(offset+8 == 26);
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return bytes_in_header;
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}
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@ -715,6 +868,74 @@ proto_register_sna(void)
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VALS(sna_th_tpf_vals), 0x03,
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"" }},
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{ &hf_sna_th_vr_cwi,
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{ "Virtual Route Change Window Indicator", "sna.th.vr_cwi", FT_UINT16, BASE_DEC,
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VALS(sna_th_vr_cwi_vals), 0x8000,
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"Used to change the window size of the virtual route by 1." }},
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{ &hf_sna_th_tg_nonfifo_ind,
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{ "Transmission Group Non-FIFO Indicator", "sna.th.tg_nonfifo_ind", FT_BOOLEAN, 16,
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TFS(&sna_th_tg_nonfifo_ind_truth), 0x4000,
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"Indicates whether or not FIFO discipline is to enforced in "
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"transmitting PIUs through the tranmission groups to prevent the PIUs "
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"getting out of sequence during transmission over the TGs." }},
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{ &hf_sna_th_vr_sqti,
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{ "Virtual Route Sequence and Type Indicator", "sna.th.vr_sqti", FT_UINT16, BASE_HEX,
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VALS(sna_th_vr_sqti_vals), 0x3000,
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"Specifies the PIU type." }},
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{ &hf_sna_th_tg_snf,
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{ "Transmission Group Sequence Number Field", "sna.th.tg_snf", FT_UINT16, BASE_DEC,
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NULL, 0x0fff,
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"" }},
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{ &hf_sna_th_vrprq,
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{ "Virtual Route Pacing Request", "sna.th.vrprq", FT_BOOLEAN, 16,
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TFS(&sna_th_vrprq_truth), 0x8000,
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"" }},
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{ &hf_sna_th_vrprs,
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{ "Virtual Route Pacing Response", "sna.th.vrprs", FT_BOOLEAN, 16,
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TFS(&sna_th_vrprs_truth), 0x4000,
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"" }},
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{ &hf_sna_th_vr_cwri,
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{ "Virtual Route Change Window Reply Indicator", "sna.th.vr_cwri", FT_UINT16, BASE_DEC,
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VALS(sna_th_vr_cwri_vals), 0x2000,
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"Permits changing of the window size by 1 for PIUs received by the "
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"sender of this bit." }},
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{ &hf_sna_th_vr_rwi,
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{ "Virtual Route Reset Window Indicator", "sna.th.vr_rwi", FT_BOOLEAN, 16,
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TFS(&sna_th_vr_rwi_truth), 0x1000,
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"Indicates severe congestion in a node on the virtual route." }},
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{ &hf_sna_th_vr_snf_send,
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{ "Virtual Route Send Sequence Number Field", "sna.th.vr_snf_send", FT_UINT16, BASE_DEC,
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NULL, 0x0fff,
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"" }},
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{ &hf_sna_th_dsaf,
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{ "Destination Subarea Address Field", "sna.th.dsaf", FT_UINT32, BASE_HEX, NULL, 0x0,
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"" }},
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{ &hf_sna_th_osaf,
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{ "Origin Subarea Address Field", "sna.th.osaf", FT_UINT32, BASE_HEX, NULL, 0x0,
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"" }},
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{ &hf_sna_th_snai,
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{ "SNA Indicator", "sna.th.snai", FT_BOOLEAN, 8, NULL, 0x10,
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"Used to identify whether the PIU originated or is destined for "
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"an SNA or non-SNA device." }},
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{ &hf_sna_th_def,
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{ "Destination Element Field", "sna.th.def", FT_UINT16, BASE_HEX, NULL, 0x0,
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"" }},
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{ &hf_sna_th_oef,
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{ "Origin Element Field", "sna.th.oef", FT_UINT16, BASE_HEX, NULL, 0x0,
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"" }},
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{ &hf_sna_rh,
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{ "Request/Response Header", "sna.rh", FT_NONE, BASE_NONE, NULL, 0x0,
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