diff options
Diffstat (limited to 'shared/systemd/src/basic/socket-util.h')
| -rw-r--r-- | shared/systemd/src/basic/socket-util.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/shared/systemd/src/basic/socket-util.h b/shared/systemd/src/basic/socket-util.h index 2596c540..5e5cf731 100644 --- a/shared/systemd/src/basic/socket-util.h +++ b/shared/systemd/src/basic/socket-util.h @@ -160,6 +160,25 @@ int flush_accept(int fd); struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t length); +/* Type-safe, dereferencing version of cmsg_find() */ +#define CMSG_FIND_DATA(mh, level, type, ctype) \ + ({ \ + struct cmsghdr *_found; \ + _found = cmsg_find(mh, level, type, CMSG_LEN(sizeof(ctype))); \ + (ctype*) (_found ? CMSG_DATA(_found) : NULL); \ + }) + +/* Resolves to a type that can carry cmsghdr structures. Make sure things are properly aligned, i.e. the type + * itself is placed properly in memory and the size is also aligned to what's appropriate for "cmsghdr" + * structures. */ +#define CMSG_BUFFER_TYPE(size) \ + union { \ + struct cmsghdr cmsghdr; \ + uint8_t buf[size]; \ + uint8_t align_check[(size) >= CMSG_SPACE(0) && \ + (size) == CMSG_ALIGN(size) ? 1 : -1]; \ + } + /* * Certain hardware address types (e.g Infiniband) do not fit into sll_addr * (8 bytes) and run over the structure. This macro returns the correct size that @@ -201,3 +220,7 @@ static inline int setsockopt_int(int fd, int level, int optname, int value) { int socket_bind_to_ifname(int fd, const char *ifname); int socket_bind_to_ifindex(int fd, int ifindex); + +ssize_t recvmsg_safe(int sockfd, struct msghdr *msg, int flags); + +int socket_pass_pktinfo(int fd, bool b); |