[PATCH] libosmo-sccp[master]: xua_msg: Add xua_msg_free_tag() and xua_msg_copy_part()

[Harald Welte]

Review at  https://gerrit.osmocom.org/2196

xua_msg: Add xua_msg_free_tag() and xua_msg_copy_part()

... also, mark input to xua_msg_find_tag as 'const' pointer.

Change-Id: I083634db9c3606bcff87700f253054a38a20816d
---
M include/osmocom/sigtran/xua_msg.h
M src/xua_msg.c
2 files changed, 31 insertions(+), 2 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/libosmo-sccp refs/changes/96/2196/1

diff --git a/include/osmocom/sigtran/xua_msg.h 
b/include/osmocom/sigtran/xua_msg.h
index 2a6e3ae..23f92c5 100644
--- a/include/osmocom/sigtran/xua_msg.h
+++ b/include/osmocom/sigtran/xua_msg.h
@@ -50,7 +50,10 @@
 
 int xua_msg_add_data(struct xua_msg *msg, uint16_t tag, uint16_t len, uint8_t 
*dat);
 
-struct xua_msg_part *xua_msg_find_tag(struct xua_msg *msg, uint16_t tag);
+struct xua_msg_part *xua_msg_find_tag(const struct xua_msg *msg, uint16_t tag);
+int xua_msg_free_tag(struct xua_msg *xua, uint16_t tag);
+int xua_msg_copy_part(struct xua_msg *xua_out, uint16_t tag_out,
+                     const struct xua_msg *xua_in, uint16_t tag_in);
 
 struct xua_msg *xua_from_msg(const int version, uint16_t len, uint8_t *data);
 struct msgb *xua_to_msg(const int version, struct xua_msg *msg);
diff --git a/src/xua_msg.c b/src/xua_msg.c
index 4a3e013..98c1832 100644
--- a/src/xua_msg.c
+++ b/src/xua_msg.c
@@ -77,7 +77,7 @@
        return 0;
 }
 
-struct xua_msg_part *xua_msg_find_tag(struct xua_msg *xua, uint16_t tag)
+struct xua_msg_part *xua_msg_find_tag(const struct xua_msg *xua, uint16_t tag)
 {
        struct xua_msg_part *part;
 
@@ -88,6 +88,32 @@
        return NULL;
 }
 
+int xua_msg_free_tag(struct xua_msg *xua, uint16_t tag)
+{
+       struct xua_msg_part *part;
+
+       llist_for_each_entry(part, &xua->headers, entry) {
+               if (part->tag == tag) {
+                       llist_del(&part->entry);
+                       talloc_free(part);
+                       return 1;
+               }
+       }
+       return 0;
+}
+
+int xua_msg_copy_part(struct xua_msg *xua_out, uint16_t tag_out,
+                     const struct xua_msg *xua_in, uint16_t tag_in)
+{
+       const struct xua_msg_part *part;
+       
+       part = xua_msg_find_tag(xua_in, tag_in);
+       if (!part)
+               return -1;
+
+       return xua_msg_add_data(xua_out, tag_out, part->len, part->dat);
+}
+
 struct xua_msg *xua_from_msg(const int version, uint16_t len, uint8_t *data)
 {
        struct xua_parameter_hdr *par;

-- 
To view, visit https://gerrit.osmocom.org/2196
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I083634db9c3606bcff87700f253054a38a20816d
Gerrit-PatchSet: 1
Gerrit-Project: libosmo-sccp
Gerrit-Branch: master
Gerrit-Owner: Harald Welte <lafo...@gnumonks.org>