diff options
| author | Volker Lendecke <vl@samba.org> | 2014-12-31 13:14:41 +0100 |
|---|---|---|
| committer | Jeremy Allison <jra@samba.org> | 2015-01-06 00:33:09 +0100 |
| commit | cd46f7685b47bb40e2f794ec7380b8078627d87f (patch) | |
| tree | bc40f9b18baae780fa9b486d5b189274ce4f47e3 /source3/lib | |
| parent | 9bd7e52db0386b928a3d777e519ee23f2a0fedfb (diff) | |
| download | samba-cd46f7685b47bb40e2f794ec7380b8078627d87f.tar.gz samba-cd46f7685b47bb40e2f794ec7380b8078627d87f.tar.xz samba-cd46f7685b47bb40e2f794ec7380b8078627d87f.zip | |
lib: Add msghdr_extract_fds
This is a copy of the extract_fd_array_from_msghdr routine in unix_msg.c, with
a similar use pattern: First call it without an output array to get the length
and then call it a second time to actually fill in the array.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Diffstat (limited to 'source3/lib')
| -rw-r--r-- | source3/lib/msghdr.c | 28 | ||||
| -rw-r--r-- | source3/lib/msghdr.h | 2 |
2 files changed, 30 insertions, 0 deletions
diff --git a/source3/lib/msghdr.c b/source3/lib/msghdr.c index 9d5f28bbb3..3449579b43 100644 --- a/source3/lib/msghdr.c +++ b/source3/lib/msghdr.c @@ -125,3 +125,31 @@ struct msghdr *msghdr_buf_msghdr(struct msghdr_buf *msg) { return &msg->msg; } + +size_t msghdr_extract_fds(struct msghdr *msg, int *fds, size_t fds_size) +{ + struct cmsghdr *cmsg; + size_t num_fds; + + for(cmsg = CMSG_FIRSTHDR(msg); + cmsg != NULL; + cmsg = CMSG_NXTHDR(msg, cmsg)) + { + if ((cmsg->cmsg_type == SCM_RIGHTS) && + (cmsg->cmsg_level == SOL_SOCKET)) { + break; + } + } + + if (cmsg == NULL) { + return 0; + } + + num_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int); + + if ((num_fds != 0) && (fds_size >= num_fds)) { + memcpy(fds, CMSG_DATA(cmsg), num_fds * sizeof(int)); + } + + return num_fds; +} diff --git a/source3/lib/msghdr.h b/source3/lib/msghdr.h index af9506c625..88829238a2 100644 --- a/source3/lib/msghdr.h +++ b/source3/lib/msghdr.h @@ -35,4 +35,6 @@ ssize_t msghdr_copy(struct msghdr_buf *msg, size_t msgsize, const int *fds, size_t num_fds); struct msghdr *msghdr_buf_msghdr(struct msghdr_buf *msg); +size_t msghdr_extract_fds(struct msghdr *msg, int *fds, size_t num_fds); + #endif |