re-structure the LOG dispatcher

we now have a nice structure for dispatching log messages to various
handlers, each self-contained.  As an added benefit, we remove the need
to manually enable all the various log codes, as we simply auto-generate
the default config from all the message types we support.

Furthermore, we reduce computational complexity by avoiding linear
iteration over the array of registered log handlers.
diff --git a/src/diag_log_gprs.c b/src/diag_log_gprs.c
new file mode 100644
index 0000000..f267600
--- /dev/null
+++ b/src/diag_log_gprs.c
@@ -0,0 +1,177 @@
+#include <stdio.h>
+
+#include "diag_log.h"
+#include "diag_gsm.h"
+#include "gprs_rlc.h"
+#include "gprs_mac.h"
+#include "log_codes_gsm.h"
+
+
+static void handle_grr_state_msg(struct log_hdr *lh, struct msgb *msg)
+{
+	struct diag_gprs_grr_state *rrs = (struct diag_gprs_grr_state *) msgb_data(msg);
+
+	printf("GRR-STATE { active=%u, state=%s }\n", rrs->active_state,
+		get_value_string(diag_gprs_grr_st_vals, rrs->grr_state));
+}
+
+static void handle_rlc_ul_abnrml_rls(struct log_hdr *lh, struct msgb *msg)
+{
+	struct gprs_rlc_ul_abnrml_rls_counts *arc;
+	arc = (struct gprs_rlc_ul_abnrml_rls_counts *) msgb_data(msg);
+
+	printf("RLC-UL-ABNRML-RLS-COUNTS { access_reject_cnt=%u, arc_retry_cnt=%u, arc_wo_retry_cnt=%u, arc_sys_info_cnt=%u }",
+		arc->access_reject_cnt, arc->arc_retry_cnt, arc->arc_wo_retry_cnt, arc->arc_sys_info_cnt);
+}
+
+static void handle_mac_sign_msg(struct log_hdr *lh, struct msgb *msg)
+{
+	struct gprs_mac_signalling_msg *msm;
+	msm = (struct gprs_mac_signalling_msg *) msgb_data(msg);
+	printf("MAC-SIGN-MSG { chan_type=%s, msg_type=%s, msg=%s }\n",
+		get_value_string(gprs_mac_chan_type_vals, msm->chan_type),
+		get_value_string(gprs_mac_msg_type_vals, msm->msg_type),
+			osmo_hexdump(msm->msg, msm->msg_len));
+}
+
+static void handle_llc_me_info(struct log_hdr *lh, struct msgb *msg)
+{
+	struct diag_gprs_llme_info *gli;
+	gli = (struct diag_gprs_llme_info *) msgb_data(msg);
+	printf("LLC-ME-INFO { state=%s, xid_version=%u, tlli_new=0x%08x, tlli_old=0x%08x, gea=%u, key=%s }\n",
+		get_value_string(diag_gprs_llme_st_vals, gli->state), gli->xid_version,
+		gli->tlli_new, gli->tlli_old, gli->enc_alg,
+		osmo_hexdump_nospc(gli->enc_key, sizeof(gli->enc_key)));
+}
+
+static void handle_llc_pdu_stats(struct log_hdr *lh, struct msgb *msg)
+{
+	struct diag_gprs_llc_stats *gls;
+	gls = (struct diag_gprs_llc_stats *) msgb_data(msg);
+	printf("LLC-PDU-STATS-ACK { sap=%u, l3pdu_tx=%u, octet_tx=%u, octet_retrans=%u, l3pdu_rx=%u, octet_rx=%u }\n",
+		gls->sapi, gls->ack_l3pdu_tx, gls->ack_octet_tx, gls->ack_l3pdu_retrans, gls->ack_l3pdu_rx, gls->ack_octet_rx);
+	printf("LLC-PDU-STATS-UNACK { sapi=%u, l3pdu_tx=%u, octet_tx=%u, l3pdu_rx=%u, octet_rx=%u }\n",
+		gls->sapi, gls->unack_l3pdu_tx, gls->unack_octet_tx, gls->unack_l3pdu_rx, gls->unack_octet_rx);
+	printf("LLC-PDU-STATS-LLPDU { tx=%u, rx=%u, fcs_err=%u, frm_rej=%u, tlli_err=%u, addr_err=%u, short_err=%u }\n",
+		gls->llpdu_tx, gls->llpdu_rx, gls->llpdu_fcs_err, gls->llpdu_frm_rej, gls->llpdu_tlli_err, gls->llpdu_addr_err, gls->llpdu_short_err);
+}
+
+static void handle_mac_state(struct log_hdr *lh, struct msgb *msg)
+{
+	struct gprs_mac_state_change *msc;
+	msc = (struct gprs_mac_state_change *) msgb_data(msg);
+	const char *name = "";
+
+	switch (msc->mac_mode) {
+	case NULL_MODE:
+		name = get_value_string(gprs_mac_null_substate_vals, msc->mac_null_fsm_state);
+		break;
+	case IDLE_MODE:
+		name = get_value_string(gprs_mac_idle_substate_vals, msc->mac_idle_fsm_state);
+		break;
+	case TRANSFER_MODE:
+		name = get_value_string(gprs_mac_transfer_substate_vals, msc->mac_transfer_fsm_state);
+		break;
+	}
+
+	printf("MAC-STATE { mode=%s, state=%s }\n",
+		get_value_string(gprs_mac_mode_vals, msc->mac_mode), name);
+}
+
+static void handle_mac_dl_tbf_est(struct log_hdr *lh, struct msgb *msg)
+{
+	struct gprs_mac_dl_tbf_est *dte;
+	dte = (struct gprs_mac_dl_tbf_est *) msgb_data(msg);
+
+	printf("MAC-DL-TBF-EST { tfi=%u, rlc_mode=%u, dl_ts_bmap=0x%x, is_egprs=%u, egprs_win_size=%u, egprs_link_qual_mode=%u, bep_period2=%u }\n",
+		dte->dl_tfi, dte->rlc_mode, dte->dl_ts_bmap, dte->is_egprs_tbf, dte->egprs_win_size, dte->egprs_link_qual_mode, dte->bep_period2);
+}
+
+static void handle_mac_ul_tbf_est(struct log_hdr *lh, struct msgb *msg)
+{
+	struct gprs_mac_ul_tbf_est *ute;
+	ute = (struct gprs_mac_ul_tbf_est *) msgb_data(msg);
+
+	printf("MAC-UL-TBF-EST { tbf_req_cause=%u, acc_granted=%u, radio_prio=%u, peak_tput=%u, ul_tfi=%u, rlc_mode=%u, ul_ts_bmap=0x%x, is_egprs=%u, egprs_win_size=%u, resegment=%u, bep_period2=%u }\n",
+		ute->tbf_req_cause, ute->acc_granted, ute->radio_prio, ute->peak_tput, ute->ul_tfi, ute->rlc_mode, ute->ul_ts_bmap, ute->is_egprs_tbf, ute->egprs_win_size, ute->resegment, ute->bep_period2);
+}
+
+static void handle_mac_dl_tbf_rel(struct log_hdr *lh, struct msgb *msg)
+{
+	struct gprs_mac_tbf_release *tr;
+	tr = (struct gprs_mac_tbf_release *) msgb_data(msg);
+
+	printf("MAC-DL-TBF-REL { tfi=%u, fail_cause=%u }\n", tr->tfi, tr->fail_cause);
+}
+
+static void handle_mac_ul_tbf_rel(struct log_hdr *lh, struct msgb *msg)
+{
+	struct gprs_mac_tbf_release *tr;
+	tr = (struct gprs_mac_tbf_release *) msgb_data(msg);
+
+	printf("MAC-DL-TBF-REL { tfi=%u, fail_cause=%u }\n", tr->tfi, tr->fail_cause);
+}
+
+static void handle_rlc_ul_evt_cnt(struct log_hdr *lh, struct msgb *msg)
+{
+	struct gprs_rlc_ul_event_counts *uec;
+	uec = (struct gprs_rlc_ul_event_counts *) msgb_data(msg);
+
+	printf("RLC-UL-EVT-CNT { llc_event_cnt=%u, mac_event_cnt=%u, pl1_event_cnt=%u, tmr_event_cnt=%u }\n",
+		uec->llc_event_cnt, uec->mac_event_cnt, uec->pl1_event_cnt, uec->tmr_event_cnt);
+}
+
+static void handle_rlc_ul_stats(struct log_hdr *lh, struct msgb *msg)
+{
+	struct gprs_rlc_ul_stats *uls;
+	uls = (struct gprs_rlc_ul_stats *) msgb_data(msg);
+
+	printf("RLC-UL-STATS { state=%s(%s), FIXME... }\n",
+		get_value_string(gprs_rlc_ul_state_vals, uls->rlc_ul_state),
+		get_value_string(gprs_rlc_ul_substate_vals, uls->rlc_ul_substate));
+}
+
+static void handle_rlc_dl_stats(struct log_hdr *lh, struct msgb *msg)
+{
+	struct gprs_rlc_dl_stats *dls;
+	dls = (struct gprs_rlc_dl_stats *) msgb_data(msg);
+
+	printf("RLC-DL-STATS { state=%s, FIXME... }\n",
+		get_value_string(gprs_rlc_dl_state_vals, dls->rlc_dl_state));
+}
+
+static void handle_rlc_rel(struct log_hdr *lh, struct msgb *msg)
+{
+	struct gprs_rlc_release_ind *rli;
+	rli = (struct gprs_rlc_release_ind *) msgb_data(msg);
+	char ud = 'D';
+
+	if (lh->code == LOG_GPRS_RLC_UL_RELEASE_IND_C)
+		ud ='U';
+
+	printf("RLC-%cL-RELEASE { tfi=%u, cause=%u }\n", ud, rli->tfi, rli->cause);
+}
+
+
+static const struct diag_log_dispatch_tbl log_tbl[] = {
+	{ GSM(LOG_GPRS_LLC_ME_INFO_C), handle_llc_me_info },
+	{ GSM(LOG_GPRS_LLC_PDU_STATS_C), handle_llc_pdu_stats },
+	{ GSM(LOG_GPRS_GRR_STATE_C), handle_grr_state_msg },
+	{ GSM(LOG_GPRS_RLC_UL_ABNRML_RLS_COUNTS_C), handle_rlc_ul_abnrml_rls },
+	{ GSM(LOG_GPRS_RLC_UL_EVENT_COUNTS_C), handle_rlc_ul_evt_cnt },
+	{ GSM(LOG_GPRS_RLC_UL_RELEASE_IND_C), handle_rlc_rel },
+	{ GSM(LOG_GPRS_RLC_DL_RELEASE_IND_C), handle_rlc_rel },
+	{ GSM(LOG_GPRS_MAC_SIGNALLING_MESSAGE_C), handle_mac_sign_msg },
+	{ GSM(LOG_GPRS_MAC_STATE_C), handle_mac_state },
+	{ GSM(LOG_GPRS_MAC_DL_TBF_ESTABLISH_C), handle_mac_dl_tbf_est },
+	{ GSM(LOG_GPRS_MAC_UL_TBF_ESTABLISH_C), handle_mac_ul_tbf_est },
+	{ GSM(LOG_GPRS_MAC_DL_TBF_RELEASE_C), handle_mac_dl_tbf_rel },
+	{ GSM(LOG_GPRS_MAC_UL_TBF_RELEASE_C), handle_mac_ul_tbf_rel },
+	{ GSM(LOG_GPRS_RLC_UL_STATS_C), handle_rlc_ul_stats },
+	{ GSM(LOG_GPRS_RLC_DL_STATS_C), handle_rlc_dl_stats },
+};
+
+static __attribute__((constructor)) void on_dso_load_gprs(void)
+{
+	diag_log_reg_dispatch(log_tbl, ARRAY_SIZE(log_tbl));
+}