This function works like osmo_hexdump() and return a static buffer
containing hex bytes along with markes for the layers.
Sponsored-by: On-Waves ehf
---
include/osmocom/core/msgb.h | 1 +
src/msgb.c | 48 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+)
diff --git a/include/osmocom/core/msgb.h b/include/osmocom/core/msgb.h
index c4be0c3..33e8081 100644
--- a/include/osmocom/core/msgb.h
+++ b/include/osmocom/core/msgb.h
@@ -73,6 +73,7 @@ extern void msgb_enqueue(struct llist_head *queue, struct
msgb *msg);
extern struct msgb *msgb_dequeue(struct llist_head *queue);
extern void msgb_reset(struct msgb *m);
uint16_t msgb_length(const struct msgb *msg);
+extern const char *msgb_hexdump(const struct msgb *msg);
#ifdef MSGB_DEBUG
#include <osmocom/core/panic.h>
diff --git a/src/msgb.c b/src/msgb.c
index 359a545..98c7d79 100644
--- a/src/msgb.c
+++ b/src/msgb.c
@@ -153,4 +153,52 @@ void msgb_set_talloc_ctx(void *ctx)
tall_msgb_ctx = ctx;
}
+/*! \brief Return (static) buffer containing a hexdump of the msg
+ * \param[in] msg message buffer
+ * \returns a pointer to a static char array
+ */
+const char *msgb_hexdump(const struct msgb *msg)
+{
+ static char buf[4100];
+ int buf_offs = 0;
+ int nchars;
+ const unsigned char *start = msg->data;
+ const unsigned char *lxhs[4];
+ int i;
+
+ lxhs[0] = msg->l1h;
+ lxhs[1] = msg->l2h;
+ lxhs[2] = msg->l3h;
+ lxhs[3] = msg->l4h;
+
+ for (i = 0; i < ARRAY_SIZE(lxhs); i++) {
+ if (lxhs[i]) {
+ if (lxhs[i] < msg->data)
+ goto out_of_range;
+ if (lxhs[i] > msg->tail)
+ goto out_of_range;
+ nchars = snprintf(buf + buf_offs, sizeof(buf) -
buf_offs,
+ "%s[L%d]> ",
+ osmo_hexdump(start, lxhs[i] - start),
+ i+1);
+ if (nchars < 0 || nchars + buf_offs >= sizeof(buf))
+ return "ERROR";
+
+ buf_offs += nchars;
+ start = lxhs[i];
+ }
+ }
+ nchars = snprintf(buf + buf_offs, sizeof(buf) - buf_offs,
+ "%s", osmo_hexdump(start, msg->tail - start));
+ if (nchars < 0 || nchars + buf_offs >= sizeof(buf))
+ return "ERROR";
+
+ return buf;
+
+out_of_range:
+ nchars = snprintf(buf, sizeof(buf) - buf_offs,
+ "!!! L%d out of range", i+1);
+ return buf;
+}
+
/*! @} */
--
1.7.9.5
