From bf48ef81f165e14f8b73320973c1fcc978e96e0d Mon Sep 17 00:00:00 2001
From: Spencer Sevilla <spencer.builds.networks@gmail.com>
Date: Sat, 8 Feb 2025 11:15:11 -0800
Subject: [PATCH] add option to support curl binding local interface/ip for sbi
 calls

---
 lib/sbi/client.c  |  6 ++++++
 lib/sbi/client.h  |  1 +
 lib/sbi/context.c | 10 ++++++++++
 3 files changed, 17 insertions(+)

diff --git a/lib/sbi/client.c b/lib/sbi/client.c
index 16ec19515b..bb108c8da3 100644
--- a/lib/sbi/client.c
+++ b/lib/sbi/client.c
@@ -212,6 +212,8 @@ void ogs_sbi_client_remove(ogs_sbi_client_t *client)
         ogs_free(client->private_key);
     if (client->cert)
         ogs_free(client->cert);
+    if (client->local_if)
+        ogs_free(client->local_if);
 
     if (client->fqdn)
         ogs_free(client->fqdn);
@@ -516,6 +518,10 @@ static connection_t *connection_add(
         curl_easy_setopt(conn->easy, CURLOPT_RESOLVE, conn->resolve_list);
     }
 
+    if (client->local_if) {
+        curl_easy_setopt(conn->easy, CURLOPT_INTERFACE, client->local_if);
+    }
+
     curl_easy_setopt(conn->easy, CURLOPT_PRIVATE, conn);
     curl_easy_setopt(conn->easy, CURLOPT_WRITEFUNCTION, write_cb);
     curl_easy_setopt(conn->easy, CURLOPT_WRITEDATA, conn);
diff --git a/lib/sbi/client.h b/lib/sbi/client.h
index d6687b38ed..4a69ae728e 100644
--- a/lib/sbi/client.h
+++ b/lib/sbi/client.h
@@ -81,6 +81,7 @@ typedef struct ogs_sbi_client_s {
     OpenAPI_uri_scheme_e scheme;
     bool insecure_skip_verify;
     char *cacert, *private_key, *cert;
+    char *local_if;
 
     char *fqdn;
     uint16_t fqdn_port;
diff --git a/lib/sbi/context.c b/lib/sbi/context.c
index 8d9a7ea12e..932013516a 100644
--- a/lib/sbi/context.c
+++ b/lib/sbi/context.c
@@ -935,6 +935,7 @@ ogs_sbi_client_t *ogs_sbi_context_parse_client_config(ogs_yaml_iter_t *iter)
 
     const char *client_private_key = NULL;
     const char *client_cert = NULL;
+    const char *local_if = NULL;
 
     bool rc;
 
@@ -976,6 +977,8 @@ ogs_sbi_client_t *ogs_sbi_context_parse_client_config(ogs_yaml_iter_t *iter)
             client_private_key = ogs_yaml_iter_value(iter);
         } else if (!strcmp(key, "client_cert")) {
             client_cert = ogs_yaml_iter_value(iter);
+        } else if (!strcmp(key, "interface")) {
+            local_if = ogs_yaml_iter_value(iter);
         }
     }
 
@@ -1045,6 +1048,13 @@ ogs_sbi_client_t *ogs_sbi_context_parse_client_config(ogs_yaml_iter_t *iter)
         ogs_assert(client->cert);
     }
 
+    if (local_if) {
+        if (client->local_if)
+            ogs_free(client->local_if);
+        client->local_if = ogs_strdup(local_if);
+        ogs_assert(client->local_if);
+    }
+
     if ((!client_private_key && client_cert) ||
         (client_private_key && !client_cert)) {
         ogs_error("Either the private key or certificate is missing.");