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socket-util: introduce CMSG_SPACE_TIMEVAL/TIMESPEC macro to support additional 64bit timeval or timespec
Fixes #20482 and #20564.
(cherry picked from commit 9365e296fe
)
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@ -239,6 +239,28 @@ static inline int getsockopt_int(int fd, int level, int optname, int *ret) {
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int socket_bind_to_ifname(int fd, const char *ifname);
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int socket_bind_to_ifindex(int fd, int ifindex);
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/* Define a 64bit version of timeval/timespec in any case, even on 32bit userspace. */
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struct timeval_large {
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uint64_t tvl_sec, tvl_usec;
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};
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struct timespec_large {
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uint64_t tvl_sec, tvl_nsec;
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};
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/* glibc duplicates timespec/timeval on certain 32bit archs, once in 32bit and once in 64bit.
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* See __convert_scm_timestamps() in glibc source code. Hence, we need additional buffer space for them
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* to prevent from recvmsg_safe() returning -EXFULL. */
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#define CMSG_SPACE_TIMEVAL \
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((sizeof(struct timeval) == sizeof(struct timeval_large)) ? \
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CMSG_SPACE(sizeof(struct timeval)) : \
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CMSG_SPACE(sizeof(struct timeval)) + \
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CMSG_SPACE(sizeof(struct timeval_large)))
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#define CMSG_SPACE_TIMESPEC \
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((sizeof(struct timespec) == sizeof(struct timespec_large)) ? \
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CMSG_SPACE(sizeof(struct timespec)) : \
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CMSG_SPACE(sizeof(struct timespec)) + \
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CMSG_SPACE(sizeof(struct timespec_large)))
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ssize_t recvmsg_safe(int sockfd, struct msghdr *msg, int flags);
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int socket_pass_pktinfo(int fd, bool b);
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@ -1273,7 +1273,7 @@ int server_process_datagram(
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* identical to NAME_MAX. For now we use that, but this should be updated one day when the final
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* limit is known. */
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CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct ucred)) +
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CMSG_SPACE(sizeof(struct timeval)) +
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CMSG_SPACE_TIMEVAL +
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CMSG_SPACE(sizeof(int)) + /* fd */
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CMSG_SPACE(NAME_MAX) /* selinux label */) control;
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@ -149,7 +149,7 @@ int icmp6_receive(int fd, void *buffer, size_t size, struct in6_addr *dst,
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triple_timestamp *timestamp) {
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CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(int)) + /* ttl */
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CMSG_SPACE(sizeof(struct timeval))) control;
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CMSG_SPACE_TIMEVAL) control;
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struct iovec iov = {};
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union sockaddr_union sa = {};
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struct msghdr msg = {
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@ -413,7 +413,7 @@ static int manager_receive_response(sd_event_source *source, int fd, uint32_t re
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.iov_base = &ntpmsg,
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.iov_len = sizeof(ntpmsg),
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};
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CMSG_BUFFER_TYPE(CMSG_SPACE(sizeof(struct timespec))) control;
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CMSG_BUFFER_TYPE(CMSG_SPACE_TIMESPEC) control;
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union sockaddr_union server_addr;
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struct msghdr msghdr = {
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.msg_iov = &iov,
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