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lynxis lazus gerrit-no-reply at lists.osmocom.orglynxis lazus has uploaded this change for review. ( 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, 27 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/16/19416/1 diff --git a/include/osmocom/core/socket.h b/include/osmocom/core/socket.h index b162066..e5383ba 100644 --- a/include/osmocom/core/socket.h +++ b/include/osmocom/core/socket.h @@ -110,6 +110,8 @@ int osmo_sock_local_ip(char *local_ip, const char *remote_ip); +int osmo_sockaddr_local_ip(struct osmo_sockaddr *local_ip, + struct osmo_sockaddr *remote_ip); int osmo_sockaddr_cmp(struct osmo_sockaddr *a, struct osmo_sockaddr *b); /*! @} */ diff --git a/src/socket.c b/src/socket.c index 70f96c4..bc0f904 100644 --- a/src/socket.c +++ b/src/socket.c @@ -1529,6 +1529,31 @@ 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, struct osmo_sockaddr *remote_ip) +{ + int sfd; + int rc; + socklen_t local_ip_len; + + sfd = osmo_sock_init3(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); + if (rc < 0) + return -EINVAL; + + return rc; +} + /*! Compare two osmo_sockaddr. Return 0 if they are same * \brief osmo_sockaddr_cmp * \param[in] a -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/19416 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I9cd2c5ceb28183e2fd2d28f9c9088c3fcac643d2 Gerrit-Change-Number: 19416 Gerrit-PatchSet: 1 Gerrit-Owner: lynxis lazus <lynxis at fe80.eu> Gerrit-MessageType: newchange -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20200728/66a82bb3/attachment.htm>