vty: Add configuration for Gb DSCP and socket priority

While libosmogb / ns2 supports that natively in the VTY, the PCU
doesn't want to use the complexities of the full NS2 vty.

Change-Id: I7bfbad46582e65e5ad2ac0cc66545538bc632df8
Related: SYS#5427

TODO-RELEASE

@@ -8,3 +8,4 @@
 # If any interfaces have been removed or changed since the last public release: c:r:0.
 #library        what            description / commit summary line
 libosmocore     struct bssgp_bvc_ctx->is_sgsn   field used available only on libosmocore >1.5.1
+libosmocore     gprs_ns2_ip_bind_set_priority   function used available only on libosmocore >1.5.1

src/gprs_bssgp_pcu.c

@@ -1060,6 +1060,11 @@ static int ns_configure_nse(struct gprs_rlcmac_bts *bts,
 					continue;
 				}
 			}
+
+			if (the_pcu->vty.ns_ip_dscp != -1)
+				gprs_ns2_ip_bind_set_dscp(bind[i], the_pcu->vty.ns_ip_dscp);
+			if (the_pcu->vty.ns_priority != -1)
+				gprs_ns2_ip_bind_set_priority(bind[i], the_pcu->vty.ns_priority);
 		}
 
 		binds |= 1 << i;

src/gprs_pcu.c

@@ -105,6 +105,8 @@ struct gprs_pcu *gprs_pcu_alloc(void *ctx)
 	pcu->vty.mcs_lqual_ranges[8].low = 23;
 	pcu->vty.mcs_lqual_ranges[8].high = 256;
 	pcu->vty.ns_dialect = GPRS_NS2_DIALECT_IPACCESS;
+	pcu->vty.ns_ip_dscp = -1;
+	pcu->vty.ns_priority = -1;
 	/* TODO: increase them when CRBB decoding is implemented */
 	pcu->vty.ws_base = 64;
 	pcu->vty.ws_pdch = 0;

src/gprs_pcu.h

@@ -102,6 +102,8 @@ struct gprs_pcu {
 		struct {int16_t low; int16_t high; } cs_lqual_ranges[MAX_GPRS_CS];
 		struct {int16_t low; int16_t high; } mcs_lqual_ranges[MAX_EDGE_MCS];
 		enum gprs_ns2_dialect ns_dialect; /* Are we talking Gb with IP-SNS (true) or classic Gb? */
+		int ns_ip_dscp;
+		int ns_priority;
 		uint16_t ws_base;
 		uint16_t ws_pdch; /* increase WS by this value per PDCH */
 		uint16_t force_llc_lifetime; /* overrides lifetime from SGSN */

src/pcu_vty.c

@@ -251,6 +251,11 @@ static int config_write_pcu(struct vty *vty)
 	else
 		vty_out(vty, " gb-dialect classic%s", VTY_NEWLINE);
 
+	if (the_pcu->vty.ns_ip_dscp != -1)
+		vty_out(vty, " gb ip-dscp %d%s", the_pcu->vty.ns_ip_dscp, VTY_NEWLINE);
+	if (the_pcu->vty.ns_priority != -1)
+		vty_out(vty, " gb socket-priority %d%s", the_pcu->vty.ns_priority, VTY_NEWLINE);
+
 	if (the_pcu->vty.neigh_ctrl_addr) {
 		vty_out(vty, " neighbor resolution %s %u%s",
 			the_pcu->vty.neigh_ctrl_addr, the_pcu->vty.neigh_ctrl_port, VTY_NEWLINE);
@@ -1031,6 +1036,30 @@ DEFUN_USRATTR(cfg_pcu_gb_dialect,
 	return CMD_SUCCESS;
 }
 
+DEFUN_USRATTR(cfg_pcu_gb_ip_dscp,
+	      cfg_pcu_gb_ip_dscp_cmd,
+	      X(PCU_VTY_ATTR_NS_RESET),
+	      "gb ip-dscp <0-63>",
+	      "Configure Gb interface\n"
+	      "Set IP DSCP value for outbound packets\n"
+	      "IP DSCP value to use\n")
+{
+	the_pcu->vty.ns_ip_dscp = atoi(argv[0]);
+	return CMD_SUCCESS;
+}
+
+DEFUN_USRATTR(cfg_pcu_gb_priority,
+	      cfg_pcu_gb_priority_cmd,
+	      X(PCU_VTY_ATTR_NS_RESET),
+	      "gb socket-priority <0-255>",
+	      "Configure Gb interface\n"
+	      "Set socket priority value for outbound packets\n"
+	      "Socket priority value to use (>6 requires CAP_NET_ADMIN)")
+{
+	the_pcu->vty.ns_priority = atoi(argv[0]);
+	return CMD_SUCCESS;
+}
+
 DEFUN(cfg_neighbor_resolution, cfg_neighbor_resolution_cmd,
        "neighbor resolution " VTY_IPV46_CMD " [<0-65535>]",
        "Manage local and remote-BSS neighbor cells\n"
@@ -1265,6 +1294,8 @@ int pcu_vty_init(void)
 	install_element(PCU_NODE, &cfg_pcu_no_gsmtap_categ_cmd);
 	install_element(PCU_NODE, &cfg_pcu_sock_cmd);
 	install_element(PCU_NODE, &cfg_pcu_gb_dialect_cmd);
+	install_element(PCU_NODE, &cfg_pcu_gb_ip_dscp_cmd);
+	install_element(PCU_NODE, &cfg_pcu_gb_priority_cmd);
 	install_element(PCU_NODE, &cfg_neighbor_resolution_cmd);
 	install_element(PCU_NODE, &cfg_pcu_timer_cmd);