Add VTY function to set the ipa bind address:
    e1_input
     ipa bind A.B.C.D

Add a priv pointer to struct e1inp_driver in order to communicate the bind
address parameter to ipaccess_line_update(). Add two "internal.h" functions to
get/set it in the ipa driver struct.

Add static ip_bind_addr() to use the IP address set from the VTY or, if NULL,
use "0.0.0.0". Apply in ipaccess_line_update().
---
 include/internal.h              |  3 +++
 include/osmocom/abis/e1_input.h |  1 +
 src/e1_input_vty.c              | 20 ++++++++++++++++++++
 src/input/ipaccess.c            | 26 ++++++++++++++++++++++++--
 4 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/include/internal.h b/include/internal.h
index 7f6e31a..740a86d 100644
--- a/include/internal.h
+++ b/include/internal.h
@@ -13,6 +13,9 @@ extern void *libosmo_abis_ctx;
 /* use libosmo_abis_init, this is only for internal use. */
 void e1inp_init(void);

+void e1inp_ipaccess_set_bind(const char *ip_bind_addr);
+const char *e1inp_ipaccess_get_bind(void);
+
 /* ipaccess.c requires these functions defined here */
 struct msgb;
 struct msgb *ipa_msg_alloc(int headroom);
diff --git a/include/osmocom/abis/e1_input.h b/include/osmocom/abis/e1_input.h
index e5d2991..4d00e03 100644
--- a/include/osmocom/abis/e1_input.h
+++ b/include/osmocom/abis/e1_input.h
@@ -139,6 +139,7 @@ struct e1inp_driver {
        void (*vty_show)(struct vty *vty, struct e1inp_line *line);
        int default_delay;
        int has_keepalive;
+       void *priv;
 };

 struct e1inp_line_ops {
diff --git a/src/e1_input_vty.c b/src/e1_input_vty.c
index 0b4adb2..71747f0 100644
--- a/src/e1_input_vty.c
+++ b/src/e1_input_vty.c
@@ -168,6 +168,18 @@ DEFUN(cfg_e1inp, cfg_e1inp_cmd,
        return CMD_SUCCESS;
 }

+DEFUN(cfg_ipa_bind,
+      cfg_ipa_bind_cmd,
+      "ipa bind A.B.C.D",
+      "ipa driver config\n"
+      "Set ipa local bind address\n"
+      "Listen on this IP address (default 0.0.0.0)\n")
+{
+       e1inp_ipaccess_set_bind(argv[0]);
+       return CMD_SUCCESS;
+}
+
+
 static int e1inp_config_write(struct vty *vty)
 {
        struct e1inp_line *line;
@@ -202,6 +214,12 @@ static int e1inp_config_write(struct vty *vty)
                                VTY_NEWLINE);

        }
+
+       const char *ipa_bind = e1inp_ipaccess_get_bind();
+       if (ipa_bind)
+               vty_out(vty, " ipa bind %s%s",
+                       ipa_bind, VTY_NEWLINE);
+
        return CMD_SUCCESS;
 }

@@ -351,6 +369,8 @@ int e1inp_vty_init(void)
        install_element(L_E1INP_NODE, &cfg_e1_line_keepalive_params_cmd);
        install_element(L_E1INP_NODE, &cfg_e1_line_no_keepalive_cmd);

+       install_element(L_E1INP_NODE, &cfg_ipa_bind_cmd);
+
        install_element_ve(&show_e1drv_cmd);
        install_element_ve(&show_e1line_cmd);
        install_element_ve(&show_e1ts_cmd);
diff --git a/src/input/ipaccess.c b/src/input/ipaccess.c
index 8ffdb19..8f4f027 100644
--- a/src/input/ipaccess.c
+++ b/src/input/ipaccess.c
@@ -804,6 +804,13 @@ struct ipaccess_line {
        int line_already_initialized;
 };

+static const char *ip_bind_addr()
+{
+       return ipaccess_driver.priv?
+               ((const char*)ipaccess_driver.priv)
+               : "0.0.0.0";
+}
+
 static int ipaccess_line_update(struct e1inp_line *line)
 {
        int ret = -ENOENT;
@@ -831,7 +838,7 @@ static int ipaccess_line_update(struct e1inp_line *line)
                LOGP(DLINP, LOGL_NOTICE, "enabling ipaccess BSC mode\n");

                oml_link = ipa_server_link_create(tall_ipa_ctx, line,
-                                                 "0.0.0.0", IPA_TCP_PORT_OML,
+                                                 ip_bind_addr(), 
IPA_TCP_PORT_OML,
                                                  ipaccess_bsc_oml_cb, NULL);
                if (oml_link == NULL) {
                        LOGP(DLINP, LOGL_ERROR, "cannot create OML "
@@ -845,7 +852,7 @@ static int ipaccess_line_update(struct e1inp_line *line)
                        return -EIO;
                }
                rsl_link = ipa_server_link_create(tall_ipa_ctx, line,
-                                                 "0.0.0.0", IPA_TCP_PORT_RSL,
+                                                 ip_bind_addr(), 
IPA_TCP_PORT_RSL,
                                                  ipaccess_bsc_rsl_cb, NULL);
                if (rsl_link == NULL) {
                        LOGP(DLINP, LOGL_ERROR, "cannot create RSL "
@@ -944,3 +951,18 @@ void e1inp_ipaccess_init(void)
        tall_ipa_ctx = talloc_named_const(libosmo_abis_ctx, 1, "ipa");
        e1inp_driver_register(&ipaccess_driver);
 }
+
+void e1inp_ipaccess_set_bind(const char *ip_bind_addr)
+{
+       talloc_free(ipaccess_driver.priv);
+       ipaccess_driver.priv = NULL;
+
+       if (ip_bind_addr)
+               ipaccess_driver.priv = (void*)talloc_strdup(tall_ipa_ctx,
+                                                           ip_bind_addr);
+}
+
+const char *e1inp_ipaccess_get_bind(void)
+{
+       return (const char*)ipaccess_driver.priv;
+}
-- 
2.1.4

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