lynxis lazus has submitted this change. (
https://gerrit.osmocom.org/c/libosmocore/+/19416 )
Change subject: add osmo_sockaddr_local_ip() to determine the local address for
a remote.
......................................................................
add osmo_sockaddr_local_ip() to determine the local address for a remote.
Similiar to osmo_sock_local_ip but for osmo_sockaddr.
Change-Id: I9cd2c5ceb28183e2fd2d28f9c9088c3fcac643d2
---
M include/osmocom/core/socket.h
M src/socket.c
2 files changed, 25 insertions(+), 0 deletions(-)
Approvals:
Jenkins Builder: Verified
pespin: Looks good to me, approved
diff --git a/include/osmocom/core/socket.h b/include/osmocom/core/socket.h
index e417f42..47a372c 100644
--- a/include/osmocom/core/socket.h
+++ b/include/osmocom/core/socket.h
@@ -113,6 +113,8 @@
int osmo_sock_local_ip(char *local_ip, const char *remote_ip);
+int osmo_sockaddr_local_ip(struct osmo_sockaddr *local_ip,
+ const struct osmo_sockaddr *remote_ip);
int osmo_sockaddr_cmp(struct osmo_sockaddr *a, struct osmo_sockaddr *b);
#endif /* (!EMBEDDED) */
diff --git a/src/socket.c b/src/socket.c
index 803af31..f078242 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -1662,6 +1662,29 @@
return 0;
}
+/*! Determine the matching local address for a given remote address.
+ * \param[out] local_ip caller provided memory for resulting local address
+ * \param[in] remote_ip remote address
+ * \returns 0 on success; negative otherwise
+ */
+int osmo_sockaddr_local_ip(struct osmo_sockaddr *local_ip, const struct
osmo_sockaddr *remote_ip)
+{
+ int sfd;
+ int rc;
+ socklen_t local_ip_len;
+
+ sfd = osmo_sock_init_osa(SOCK_DGRAM, IPPROTO_UDP, NULL, remote_ip,
OSMO_SOCK_F_CONNECT);
+ if (sfd < 0)
+ return -EINVAL;
+
+ memset(local_ip, 0, sizeof(*local_ip));
+ local_ip_len = sizeof(*local_ip);
+ rc = getsockname(sfd, (struct sockaddr *)local_ip, &local_ip_len);
+ close(sfd);
+
+ return rc;
+}
+
/*! Compare two osmo_sockaddr.
* \param[in] a
* \param[in] b
--
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Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Change-Id: I9cd2c5ceb28183e2fd2d28f9c9088c3fcac643d2
Gerrit-Change-Number: 19416
Gerrit-PatchSet: 20
Gerrit-Owner: lynxis lazus <[email protected]>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: daniel <[email protected]>
Gerrit-Reviewer: laforge <[email protected]>
Gerrit-Reviewer: lynxis lazus <[email protected]>
Gerrit-Reviewer: pespin <[email protected]>
Gerrit-MessageType: merged
