69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
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#include <sys/socket.h>
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#include <limits.h>
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#include <time.h>
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#include <sys/time.h>
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#include <string.h>
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#include "syscall.h"
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hidden void __convert_scm_timestamps(struct msghdr *, socklen_t);
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void __convert_scm_timestamps(struct msghdr *msg, socklen_t csize)
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{
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if (SCM_TIMESTAMP == SCM_TIMESTAMP_OLD) return;
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if (!msg->msg_control || !msg->msg_controllen) return;
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struct cmsghdr *cmsg, *last=0;
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long tmp;
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long long tvts[2];
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int type = 0;
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for (cmsg=CMSG_FIRSTHDR(msg); cmsg; cmsg=CMSG_NXTHDR(msg, cmsg)) {
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if (cmsg->cmsg_level==SOL_SOCKET) switch (cmsg->cmsg_type) {
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case SCM_TIMESTAMP_OLD:
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if (type) break;
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type = SCM_TIMESTAMP;
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goto common;
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case SCM_TIMESTAMPNS_OLD:
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type = SCM_TIMESTAMPNS;
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common:
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memcpy(&tmp, CMSG_DATA(cmsg), sizeof tmp);
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tvts[0] = tmp;
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memcpy(&tmp, CMSG_DATA(cmsg) + sizeof tmp, sizeof tmp);
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tvts[1] = tmp;
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break;
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}
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last = cmsg;
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}
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if (!last || !type) return;
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if (CMSG_SPACE(sizeof tvts) > csize-msg->msg_controllen) {
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msg->msg_flags |= MSG_CTRUNC;
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return;
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}
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msg->msg_controllen += CMSG_SPACE(sizeof tvts);
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cmsg = CMSG_NXTHDR(msg, last);
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cmsg->cmsg_level = SOL_SOCKET;
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cmsg->cmsg_type = type;
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cmsg->cmsg_len = CMSG_LEN(sizeof tvts);
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memcpy(CMSG_DATA(cmsg), &tvts, sizeof tvts);
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}
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ssize_t recvmsg(int fd, struct msghdr *msg, int flags)
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{
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ssize_t r;
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socklen_t orig_controllen = msg->msg_controllen;
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#if LONG_MAX > INT_MAX
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struct msghdr h, *orig = msg;
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if (msg) {
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h = *msg;
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h.__pad1 = h.__pad2 = 0;
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msg = &h;
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}
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#endif
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r = socketcall_cp(recvmsg, fd, msg, flags, 0, 0, 0);
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if (r >= 0) __convert_scm_timestamps(msg, orig_controllen);
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#if LONG_MAX > INT_MAX
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if (orig) *orig = h;
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#endif
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return r;
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}
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