2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
22 #include <sys/resource.h>
24 #include <vcl/vcom_socket_wrapper.h>
28 #include <vcl/vppcom.h>
29 #include <vcl/vcom_socket.h>
31 /* GCC have printf type attribute check. */
32 #ifdef HAVE_FUNCTION_ATTRIBUTE_FORMAT
33 #define PRINTF_ATTRIBUTE(a,b) \
34 __attribute__ ((__format__ (__printf__, a, b)))
36 #define PRINTF_ATTRIBUTE(a,b)
37 #endif /* HAVE_FUNCTION_ATTRIBUTE_FORMAT */
39 #define HAVE_CONSTRUCTOR_ATTRIBUTE
40 #ifdef HAVE_CONSTRUCTOR_ATTRIBUTE
41 #define CONSTRUCTOR_ATTRIBUTE \
42 __attribute__ ((constructor))
44 #define CONSTRUCTOR_ATTRIBUTE
45 #endif /* HAVE_CONSTRUCTOR_ATTRIBUTE */
47 #define HAVE_DESTRUCTOR_ATTRIBUTE
48 #ifdef HAVE_DESTRUCTOR_ATTRIBUTE
49 #define DESTRUCTOR_ATTRIBUTE \
50 __attribute__ ((destructor))
52 #define DESTRUCTOR_ATTRIBUTE
55 #define HAVE_ADDRESS_SANITIZER_ATTRIBUTE
56 #ifdef HAVE_ADDRESS_SANITIZER_ATTRIBUTE
57 #define DO_NOT_SANITIZE_ADDRESS_ATTRIBUTE \
58 __attribute__((no_sanitize_address))
60 #define DO_NOT_SANITIZE_ADDRESS_ATTRIBUTE
63 #define VCOM_SOCKET_FD_MAX 0x10000
65 static char vcom_app_name[MAX_VCOM_APP_NAME];
68 * RETURN: 0 on success or -1 on error.
71 vcom_set_app_name (char *__app_name)
73 return snprintf (vcom_app_name, MAX_VCOM_APP_NAME, "vcom-%s-%d",
74 __app_name, getpid ()) < 0 ? -1 : 0;
80 if (vcom_app_name[0] == '\0')
82 snprintf (vcom_app_name, MAX_VCOM_APP_NAME, "vcom-app-%d", getpid ());
88 * 1 if init, 0 otherwise
90 static int is_vcom_init;
93 * TBD: Make it thread safe
97 * constructor function called before main is called
98 * RETURN: 0 on success -1 on failure
103 pid_t pid = getpid ();
107 if (vppcom_app_create (vcom_get_app_name ()) != 0)
109 printf ("\n[%d] vcom_init...failed!\n", pid);
112 "[%d] vcom_init: vppcom_app_create failed!\n", pid);
115 if (vcom_socket_main_init () != 0)
117 printf ("\n[%d] vcom_init...failed!\n", pid);
120 "[%d] vcom_init: vcom_socket_main_init failed!\n", pid);
125 printf ("\n[%d] vcom_init...done!\n", pid);
133 pid_t pid = getpid ();
137 vcom_socket_main_destroy ();
138 vppcom_app_destroy ();
140 fprintf (stderr, "\n[%d] vcom_destroy...done!\n", pid);
145 is_vcom_socket_fd (int fd)
147 return vcom_socket_is_vcom_fd (fd);
151 is_vcom_epfd (int epfd)
153 return vcom_socket_is_vcom_epfd (epfd);
159 * Generic glibc fd api
163 /* Close the file descriptor FD.
165 This function is a cancellation point and therefore
166 not marked with __THROW. */
168 * PRE: is_vcom_socket_fd(__fd) == 1
169 * RETURN: 0 on success and -1 for errors.
172 vcom_close (int __fd)
174 if (vcom_init () != 0)
179 if (vcom_socket_close (__fd) != 0)
188 * RETURN: 0 on success, or -1 on error
194 pid_t pid = getpid ();
196 if (is_vcom_socket_fd (__fd) || is_vcom_epfd (__fd))
199 vcom_socket_main_show ();
200 rv = vcom_close (__fd);
202 fprintf (stderr, "[%d] close: " "'%04d'='%04d'\n", pid, rv, __fd);
204 vcom_socket_main_show ();
212 return libc_close (__fd);
215 /* Read NBYTES into BUF from FD. Return the
216 number read, -1 for errors or 0 for EOF.
218 This function is a cancellation point and therefore
219 not marked with __THROW. */
221 vcom_read (int __fd, void *__buf, size_t __nbytes)
223 if (vcom_init () != 0)
228 return vcom_socket_read (__fd, __buf, __nbytes);
232 read (int __fd, void *__buf, size_t __nbytes)
235 pid_t pid = getpid ();
236 pthread_t tid = pthread_self ();
238 if (is_vcom_socket_fd (__fd))
242 "[%d][%lu (0x%lx)] read:1 "
243 "'%04d'='%04d', '%p', '%04d'\n",
244 pid, (unsigned long) tid, (unsigned long) tid,
245 (int) size, __fd, __buf, (int) __nbytes);
246 size = vcom_read (__fd, __buf, __nbytes);
249 "[%d][%lu (0x%lx)] read:2 "
250 "'%04d'='%04d', '%p', '%04d'\n",
251 pid, (unsigned long) tid, (unsigned long) tid,
252 (int) size, __fd, __buf, (int) __nbytes);
260 return libc_read (__fd, __buf, __nbytes);
264 vcom_readv (int __fd, const struct iovec * __iov, int __iovcnt)
266 if (vcom_init () != 0)
271 return vcom_socket_readv (__fd, __iov, __iovcnt);
275 readv (int __fd, const struct iovec * __iov, int __iovcnt)
279 if (is_vcom_socket_fd (__fd))
281 size = vcom_readv (__fd, __iov, __iovcnt);
290 return libc_readv (__fd, __iov, __iovcnt);
293 /* Write N bytes of BUF to FD. Return the number written, or -1.
295 This function is a cancellation point and therefore
296 not marked with __THROW. */
298 vcom_write (int __fd, const void *__buf, size_t __n)
300 if (vcom_init () != 0)
305 return vcom_socket_write (__fd, (void *) __buf, __n);
309 write (int __fd, const void *__buf, size_t __n)
312 pid_t pid = getpid ();
313 pthread_t tid = pthread_self ();
315 if (is_vcom_socket_fd (__fd))
319 "[%d][%lu (0x%lx)] write:1 "
320 "'%04d'='%04d', '%p', '%04d'\n",
321 pid, (unsigned long) tid, (unsigned long) tid,
322 (int) size, __fd, __buf, (int) __n);
323 size = vcom_write (__fd, __buf, __n);
326 "[%d][%lu (0x%lx)] write:2 "
327 "'%04d'='%04d', '%p', '%04d'\n",
328 pid, (unsigned long) tid, (unsigned long) tid,
329 (int) size, __fd, __buf, (int) __n);
337 return libc_write (__fd, __buf, __n);
341 vcom_writev (int __fd, const struct iovec * __iov, int __iovcnt)
343 if (vcom_init () != 0)
348 return vcom_socket_writev (__fd, __iov, __iovcnt);
352 writev (int __fd, const struct iovec * __iov, int __iovcnt)
356 if (is_vcom_socket_fd (__fd))
358 size = vcom_writev (__fd, __iov, __iovcnt);
367 return libc_writev (__fd, __iov, __iovcnt);
370 /* Do the file control operation described by CMD on FD.
371 The remaining arguments are interpreted depending on CMD.
373 This function is a cancellation point and therefore
374 not marked with __THROW. */
376 vcom_fcntl_va (int __fd, int __cmd, va_list __ap)
378 if (vcom_init () != 0)
383 return vcom_socket_fcntl_va (__fd, __cmd, __ap);
387 vcom_fcntl (int __fd, int __cmd, ...)
392 if (is_vcom_socket_fd (__fd))
394 va_start (ap, __cmd);
395 rv = vcom_fcntl_va (__fd, __cmd, ap);
402 fcntl (int __fd, int __cmd, ...)
406 pid_t pid = getpid ();
408 va_start (ap, __cmd);
409 if (is_vcom_socket_fd (__fd))
411 rv = vcom_fcntl_va (__fd, __cmd, ap);
415 "'%04d'='%04d', '%04d'\n", pid, rv, __fd, __cmd);
423 rv = libc_vfcntl (__fd, __cmd, ap);
431 vcom_ioctl_va (int __fd, unsigned long int __cmd, va_list __ap)
433 if (vcom_init () != 0)
438 return vcom_socket_ioctl_va (__fd, __cmd, __ap);
442 vcom_ioctl (int __fd, unsigned long int __cmd, ...)
447 if (is_vcom_socket_fd (__fd))
449 va_start (ap, __cmd);
450 rv = vcom_ioctl_va (__fd, __cmd, ap);
457 ioctl (int __fd, unsigned long int __cmd, ...)
461 pid_t pid = getpid ();
463 va_start (ap, __cmd);
464 if (is_vcom_socket_fd (__fd))
466 rv = vcom_ioctl_va (__fd, __cmd, ap);
470 "'%04d'='%04d', '%04ld'\n", pid, rv, __fd, __cmd);
478 rv = libc_vioctl (__fd, __cmd, ap);
486 * Check the first NFDS descriptors each in READFDS (if not NULL) for
487 * read readiness, in WRITEFDS (if not NULL) for write readiness,
488 * and in EXCEPTFDS (if not NULL) for exceptional conditions.
489 * If TIMEOUT is not NULL, time out after waiting the interval
490 * specified therein. Returns the number of ready descriptors,
493 * This function is a cancellation point and therefore not marked
498 * clear all vcom FDs from fd_sets __readfds, __writefds and
499 * __exceptfds and update the new nfds
501 * new nfds is the highest-numbered file descriptor
502 * in any of the three sets, plus 1
504 * Return the number of file descriptors contained in the
505 * three descriptor sets. ie. the total number of the bits
506 * that are set in __readfds, __writefds and __exceptfds
509 vcom_fd_clear (int __nfds,
511 fd_set * __restrict __readfds,
512 fd_set * __restrict __writefds,
513 fd_set * __restrict __exceptfds)
516 /* invalid max_fd is -1 */
521 /* clear all vcom fd from the sets */
522 for (fd = 0; fd < __nfds; fd++)
525 /* clear vcom fd from set */
530 if ((F) && FD_ISSET (fd, (F))) \
532 if (is_vcom_socket_fd (fd)) \
546 * compute nfd and __new_nfds
548 for (fd = 0; fd < __nfds; fd++)
555 if ((F) && FD_ISSET (fd, (F))) \
571 *__new_nfds = max_fd != -1 ? max_fd + 1 : 0;
576 * Return the number of file descriptors contained in the
577 * three descriptor sets. ie. the total number of the bits
578 * that are set in __readfds, __writefds and __exceptfds
581 vcom_fd_set (int __nfds,
584 fd_set * __restrict __readfds,
585 fd_set * __restrict __writefds, fd_set * __restrict __exceptfds,
587 fd_set * __restrict __saved_readfds,
588 fd_set * __restrict __saved_writefds,
589 fd_set * __restrict __saved_exceptfds)
592 /* invalid max_fd is -1 */
596 for (fd = 0; fd < __nfds; fd++)
603 if ((F) && (S) && FD_ISSET (fd, (S))) \
605 if (is_vcom_socket_fd (fd)) \
612 _(__saved_readfds, __readfds);
613 _(__saved_writefds, __writefds);
619 * compute nfd and __new_nfds
621 for (fd = 0; fd < __nfds; fd++)
628 if ((F) && FD_ISSET (fd, (F))) \
644 *__new_nfds = max_fd != -1 ? max_fd + 1 : 0;
649 * split select sets(src) into
650 * vcom sets(dest1) and libc sets(dest2)
654 /* src, select sets */
656 fd_set * __restrict readfds,
657 fd_set * __restrict writefds,
658 fd_set * __restrict exceptfds,
659 /* dest1, vcom sets */
661 fd_set * __restrict vcom_readfds,
662 fd_set * __restrict vcom_writefds,
663 fd_set * __restrict vcom_exceptfds, int *vcom_nfd,
664 /* dest2, libc sets */
666 fd_set * __restrict libc_readfds,
667 fd_set * __restrict libc_writefds,
668 fd_set * __restrict libc_exceptfds, int *libc_nfd)
673 /* invalid max_fd is -1 */
674 int vcom_max_fd = -1;
678 /* invalid max_fd is -1 */
679 int libc_max_fd = -1;
683 for (fd = 0; fd < nfds; fd++)
691 if ((S) && FD_ISSET (fd, (S))) \
693 if (is_vcom_socket_fd (fd)) \
698 if (fd > vcom_max_fd) \
710 if (fd > libc_max_fd) \
720 _(readfds, vcom_readfds, libc_readfds);
721 _(writefds, vcom_writefds, libc_writefds);
722 _(exceptfds, vcom_exceptfds, libc_exceptfds);
727 *vcom_nfds = vcom_max_fd != -1 ? vcom_max_fd + 1 : 0;
729 *vcom_nfd = vcom_nfd2;
731 *libc_nfds = libc_max_fd != -1 ? libc_max_fd + 1 : 0;
733 *libc_nfd = libc_nfd2;
737 * merge vcom sets(src1) and libc sets(src2)
738 * into select sets(dest)
742 /* dest, select sets */
744 fd_set * __restrict readfds,
745 fd_set * __restrict writefds,
746 fd_set * __restrict exceptfds, int *nfd,
747 /* src1, vcom sets */
749 fd_set * __restrict vcom_readfds,
750 fd_set * __restrict vcom_writefds,
751 fd_set * __restrict vcom_exceptfds, int vcom_nfd,
752 /* src2, libc sets */
754 fd_set * __restrict libc_readfds,
755 fd_set * __restrict libc_writefds,
756 fd_set * __restrict libc_exceptfds, int libc_nfd)
759 /* invalid max_fd is -1 */
766 * dest |= src at current bit index
767 * update MAX and NFD of dest fd set
773 * MAX current max_fd of dest fd sets
774 * NFD current nfd of dest fd sets
775 * N nfds of source fd set
777 #define FD_BIT_OR(FD,FS,BI, \
779 if ((FS) && (FD) && FD_ISSET ((BI), (FS))) \
781 FD_SET ((BI), (FD)); \
792 * SR,SW,SE source RWE fd sets
793 * DR,DW,DE dest RWE fd sets
795 * NFDS nfds of source fd sets
796 * MAX current max_fd of dest fd sets
797 * NFD current nfd of dest fd sets
799 #define FD_RWE_SETS_OR(DR,DW,DE, \
805 for ((BI) = 0; (BI) < (NFDS); (BI)++) \
807 FD_BIT_OR((DR), (SR), (BI), (MAX), (NFD)); \
808 FD_BIT_OR((DW), (SW), (BI), (MAX), (NFD)); \
809 FD_BIT_OR((DE), (SE), (BI), (MAX), (NFD)); \
815 /* source(vcom) to dest(select) rwe fd sets */
816 FD_RWE_SETS_OR (readfds, writefds, exceptfds,
817 vcom_readfds, vcom_writefds, vcom_exceptfds,
818 fd, vcom_nfds, max_fd, nfd2);
820 /* source(libc) to dest(select) rwe fd sets */
821 FD_RWE_SETS_OR (readfds, writefds, exceptfds,
822 libc_readfds, libc_writefds, libc_exceptfds,
823 fd, libc_nfds, max_fd, nfd2);
825 #undef FD_RWE_SETS_OR
829 *nfds = max_fd != -1 ? max_fd + 1 : 0;
835 * RETURN 1 if fds is NULL or empty. 0 otherwise
838 fd_set_iszero (fd_set * __restrict fds)
846 for (fd = 0; fd < FD_SETSIZE; fd++)
848 if (FD_ISSET (fd, fds))
864 typedef long int s64;
865 typedef unsigned long int u64;
867 typedef long long int __s64;
868 typedef unsigned long long int __u64;
870 typedef __s64 time64_t;
871 typedef __u64 timeu64_t;
873 /* Parameters used to convert the timespec values: */
874 #define MSEC_PER_SEC 1000L
875 #define USEC_PER_MSEC 1000L
876 #define NSEC_PER_USEC 1000L
877 #define NSEC_PER_MSEC 1000000L
878 #define USEC_PER_SEC 1000000L
879 #define NSEC_PER_SEC 1000000000L
880 #define FSEC_PER_SEC 1000000000000000LL
890 #define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
892 #ifdef VCOM_USE_TIMESPEC_EQUAL
894 timespec_equal (const struct timespec *a, const struct timespec *b)
896 return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
901 * lhs < rhs: return <0
902 * lhs == rhs: return 0
903 * lhs > rhs: return >0
906 timespec_compare (const struct timespec *lhs, const struct timespec *rhs)
908 if (lhs->tv_sec < rhs->tv_sec)
910 if (lhs->tv_sec > rhs->tv_sec)
912 return lhs->tv_nsec - rhs->tv_nsec;
915 #ifdef VCOM_USE_TIMEVAL_COMPARE
917 timeval_compare (const struct timeval *lhs, const struct timeval *rhs)
919 if (lhs->tv_sec < rhs->tv_sec)
921 if (lhs->tv_sec > rhs->tv_sec)
923 return lhs->tv_usec - rhs->tv_usec;
927 extern void set_normalized_timespec (struct timespec *ts, time_t sec,
930 static inline struct timespec
931 timespec_add (struct timespec lhs, struct timespec rhs)
933 struct timespec ts_delta;
934 set_normalized_timespec (&ts_delta, lhs.tv_sec + rhs.tv_sec,
935 lhs.tv_nsec + rhs.tv_nsec);
940 * sub = lhs - rhs, in normalized form
942 static inline struct timespec
943 timespec_sub (struct timespec lhs, struct timespec rhs)
945 struct timespec ts_delta;
946 set_normalized_timespec (&ts_delta, lhs.tv_sec - rhs.tv_sec,
947 lhs.tv_nsec - rhs.tv_nsec);
959 * set_normalized_timespec - set timespec sec and nsec parts and normalize
961 * @ts: pointer to timespec variable to be set
962 * @sec: seconds to set
963 * @nsec: nanoseconds to set
965 * Set seconds and nanoseconds field of a timespec variable and
966 * normalize to the timespec storage format
968 * Note: The tv_nsec part is always in the range of
969 * 0 <= tv_nsec < NSEC_PER_SEC
970 * For negative values only the tv_sec field is negative !
973 set_normalized_timespec (struct timespec *ts, time_t sec, s64 nsec)
975 while (nsec >= NSEC_PER_SEC)
978 * The following asm() prevents the compiler from
979 * optimising this loop into a modulo operation. See
980 * also __iter_div_u64_rem() in include/linux/time.h
982 asm ("":"+rm" (nsec));
983 nsec -= NSEC_PER_SEC;
988 asm ("":"+rm" (nsec));
989 nsec += NSEC_PER_SEC;
996 #define vcom_timerisvalid(tvp) (!((tvp)->tv_sec < 0 || (tvp)->tv_usec < 0))
998 /* Macros for converting between `struct timeval' and `struct timespec'. */
999 #define VCOM_TIMEVAL_TO_TIMESPEC(tv, ts) { \
1000 (ts)->tv_sec = (tv)->tv_sec; \
1001 (ts)->tv_nsec = (tv)->tv_usec * 1000; \
1003 #define VCOM_TIMESPEC_TO_TIMEVAL(tv, ts) { \
1004 (tv)->tv_sec = (ts)->tv_sec; \
1005 (tv)->tv_usec = (ts)->tv_nsec / 1000; \
1009 vcom_select_impl (int vcom_nfds, fd_set * __restrict vcom_readfds,
1010 fd_set * __restrict vcom_writefds,
1011 fd_set * __restrict vcom_exceptfds,
1012 struct timeval *__restrict timeout)
1014 return vcom_socket_select (vcom_nfds, vcom_readfds,
1015 vcom_writefds, vcom_exceptfds, timeout);
1019 vcom_select (int __nfds, fd_set * __restrict __readfds,
1020 fd_set * __restrict __writefds,
1021 fd_set * __restrict __exceptfds,
1022 struct timeval *__restrict __timeout)
1026 pid_t pid = getpid ();
1029 /* block indefinitely */
1031 int first_clock_gettime_failed = 0;
1032 /* timeout value in units of timespec */
1033 struct timespec timeout_ts;
1034 struct timespec start_time, now, end_time;
1036 /* select sets attributes - after merge */
1042 fd_set vcom_readfds;
1043 fd_set vcom_writefds;
1044 fd_set vcom_exceptfds;
1049 fd_set libc_readfds;
1050 fd_set libc_writefds;
1051 fd_set libc_exceptfds;
1055 struct timeval tv = {.tv_sec = 0,.tv_usec = 0 };
1057 /* validate __timeout */
1060 /* validate tv_sec */
1062 if (!vcom_timerisvalid (__timeout))
1068 /* validate tv_usec */
1070 /* init timeout_ts */
1071 VCOM_TIMEVAL_TO_TIMESPEC (__timeout, &timeout_ts);
1072 set_normalized_timespec (&timeout_ts,
1073 timeout_ts.tv_sec, timeout_ts.tv_nsec);
1076 rv = clock_gettime (CLOCK_MONOTONIC, &start_time);
1080 first_clock_gettime_failed = 1;
1087 if (timerisset (__timeout))
1089 end_time = timespec_add (start_time, timeout_ts);
1094 * if both fields of the timeout structure are zero,
1095 * then select returns immediately
1097 end_time = start_time;
1102 /* block indefinitely */
1108 if (vcom_init () != 0)
1114 /* validate __nfds */
1115 if (__nfds < 0 || __nfds > FD_SETSIZE)
1123 * usleep(3) emulation
1126 /* call libc_select() with a finite timeout and
1127 * no file descriptors or empty fd sets and
1130 (!__readfds || fd_set_iszero (__readfds)) &&
1131 (!__writefds || fd_set_iszero (__writefds)) &&
1132 (!__exceptfds || fd_set_iszero (__exceptfds)))
1136 rv = libc_select (__nfds,
1137 __readfds, __writefds, __exceptfds, __timeout);
1143 /* TBD: block indefinitely or return -EINVAL */
1149 /* init once before the polling loop */
1151 /* zero vcom and libc fd sets */
1165 _(__readfds, &vcom_readfds, &libc_readfds);
1166 _(__writefds, &vcom_writefds, &libc_writefds);
1167 _(__exceptfds, &vcom_exceptfds, &libc_exceptfds);
1178 /* src, select sets */
1179 __nfds, __readfds, __writefds, __exceptfds,
1180 /* dest1, vcom sets */
1181 __readfds || __writefds || __exceptfds ?
1183 __readfds ? &vcom_readfds : NULL,
1184 __writefds ? &vcom_writefds : NULL,
1185 __exceptfds ? &vcom_exceptfds : NULL,
1186 __readfds || __writefds || __exceptfds ?
1188 /* dest2, libc sets */
1189 __readfds || __writefds || __exceptfds ?
1191 __readfds ? &libc_readfds : NULL,
1192 __writefds ? &libc_writefds : NULL,
1193 __exceptfds ? &libc_exceptfds : NULL,
1194 __readfds || __writefds || __exceptfds ?
1207 * if both fields of timeval structure are zero,
1208 * vcom_select_impl and libc_select returns immediately.
1209 * useful for polling and ensure fairness among
1210 * file descriptors watched.
1217 /* select on vcom fds */
1220 vcom_nfd = vcom_select_impl (vcom_nfds,
1221 __readfds ? &vcom_readfds : NULL,
1222 __writefds ? &vcom_writefds : NULL,
1223 __exceptfds ? &vcom_exceptfds : NULL,
1227 "[%d] select vcom: "
1228 "'%04d'='%04d'\n", pid, vcom_nfd, vcom_nfds);
1236 /* select on libc fds */
1239 libc_nfd = libc_select (libc_nfds,
1240 __readfds ? &libc_readfds : NULL,
1241 __writefds ? &libc_writefds : NULL,
1242 __exceptfds ? &libc_exceptfds : NULL, &tv);
1245 "[%d] select libc: "
1246 "'%04d'='%04d'\n", pid, libc_nfd, libc_nfds);
1250 /* tv becomes undefined */
1257 /* check if any file descriptors changed status */
1258 if ((vcom_nfds && vcom_nfd > 0) || (libc_nfds && libc_nfd > 0))
1260 /* zero the sets before merge and exit */
1280 * on exit, sets are modified in place to indicate which
1281 * file descriptors actually changed status
1284 /* dest, select sets */
1289 __readfds || __writefds || __exceptfds ?
1291 /* src1, vcom sets */
1293 __readfds ? &vcom_readfds : NULL,
1294 __writefds ? &vcom_writefds : NULL,
1295 __exceptfds ? &vcom_exceptfds : NULL, vcom_nfd,
1296 /* src2, libc sets */
1298 __readfds ? &libc_readfds : NULL,
1299 __writefds ? &libc_writefds : NULL,
1300 __exceptfds ? &libc_exceptfds : NULL, libc_nfd);
1302 * return the number of file descriptors contained in the
1303 * three returned sets
1315 rv = new_nfd == -1 ? 0 : new_nfd;
1319 rv = clock_gettime (CLOCK_MONOTONIC, &now);
1326 while (no_timeout || timespec_compare (&now, &end_time) < 0);
1328 /* timeout expired before anything interesting happened */
1334 fprintf (stderr, "[%d] vselect1: " "'%04d'='%04d'\n", pid, rv, __nfds);
1336 * modify timeout parameter to reflect the amount of time not slept
1340 if (vcom_timerisvalid (__timeout))
1342 /* timeout expired */
1345 timerclear (__timeout);
1347 else if (!first_clock_gettime_failed)
1349 rv2 = clock_gettime (CLOCK_MONOTONIC, &now);
1356 struct timespec ts_delta;
1357 ts_delta = timespec_sub (end_time, now);
1358 VCOM_TIMESPEC_TO_TIMEVAL (__timeout, &ts_delta);
1364 fprintf (stderr, "[%d] vselect2: " "'%04d',='%04d'\n", pid, rv, __nfds);
1370 vcom_select_internal (int __nfds, fd_set * __restrict __readfds,
1371 fd_set * __restrict __writefds,
1372 fd_set * __restrict __exceptfds,
1373 struct timeval *__restrict __timeout)
1378 pid_t pid = getpid ();
1380 fd_set saved_readfds;
1381 fd_set saved_writefds;
1382 fd_set saved_exceptfds;
1384 /* validate __nfds */
1391 /* validate __timeout */
1394 /* validate tv_sec */
1396 if (__timeout->tv_sec < 0 || __timeout->tv_usec < 0)
1402 /* validate tv_usec */
1406 /* init saved_x fds */
1409 saved_readfds = *__readfds;
1411 memcpy (&saved_readfds, __readfds, sizeof (*__readfds));
1416 FD_ZERO (&saved_readfds);
1421 saved_writefds = *__writefds;
1423 memcpy (&saved_writefds, __writefds, sizeof (*__writefds));
1429 FD_ZERO (&saved_writefds);
1434 saved_exceptfds = *__exceptfds;
1436 memcpy (&saved_exceptfds, __exceptfds, sizeof (*__exceptfds));
1442 FD_ZERO (&saved_exceptfds);
1445 /* clear vcom fds */
1446 nfd = vcom_fd_clear (__nfds, &new_nfds, __readfds, __writefds, __exceptfds);
1448 /* set to an invalid value */
1450 /* have kernel fds */
1452 rv = libc_select (new_nfds, __readfds,
1453 __writefds, __exceptfds, __timeout);
1455 if (new_nfds && rv == -1)
1457 /* on error, the file descriptor sets are unmodified */
1459 *__readfds = saved_readfds;
1461 *__writefds = saved_writefds;
1463 *__exceptfds = saved_exceptfds;
1466 else if ((new_nfds && rv != -1) || (rv == -2))
1468 /* restore vcom fds */
1469 nfd = vcom_fd_set (__nfds,
1474 &saved_readfds, &saved_writefds, &saved_exceptfds);
1479 fprintf (stderr, "[%d] select: " "'%04d'='%04d'\n", pid, rv, __nfds);
1484 select (int __nfds, fd_set * __restrict __readfds,
1485 fd_set * __restrict __writefds,
1486 fd_set * __restrict __exceptfds, struct timeval *__restrict __timeout)
1489 pid_t pid = getpid ();
1492 fprintf (stderr, "[%d] select1: " "'%04d'='%04d'\n", pid, rv, __nfds);
1493 rv = vcom_select (__nfds, __readfds, __writefds, __exceptfds, __timeout);
1495 fprintf (stderr, "[%d] select2: " "'%04d'='%04d'\n", pid, rv, __nfds);
1504 #ifdef __USE_XOPEN2K
1506 * Same as above only that the TIMEOUT value is given with higher
1507 * resolution and a sigmask which is been set temporarily. This
1508 * version should be used.
1510 * This function is a cancellation point and therefore not marked
1514 vcom_pselect (int __nfds, fd_set * __restrict __readfds,
1515 fd_set * __restrict __writefds,
1516 fd_set * __restrict __exceptfds,
1517 const struct timespec *__restrict __timeout,
1518 const __sigset_t * __restrict __sigmask)
1523 for (fd = 0; fd < __nfds; fd++)
1525 if (__readfds && FD_ISSET (fd, __readfds))
1527 if (is_vcom_socket_fd (fd))
1533 if (__writefds && FD_ISSET (fd, __writefds))
1535 if (is_vcom_socket_fd (fd))
1540 if (__exceptfds && FD_ISSET (fd, __exceptfds))
1542 if (is_vcom_socket_fd (fd))
1544 FD_CLR (fd, __exceptfds);
1552 pselect (int __nfds, fd_set * __restrict __readfds,
1553 fd_set * __restrict __writefds,
1554 fd_set * __restrict __exceptfds,
1555 const struct timespec *__restrict __timeout,
1556 const __sigset_t * __restrict __sigmask)
1561 pid_t pid = getpid ();
1563 fd_set saved_readfds;
1564 fd_set saved_writefds;
1565 fd_set saved_exceptfds;
1567 /* validate __nfds */
1574 /* validate __timeout */
1577 /* validate tv_sec */
1579 if (__timeout->tv_sec < 0 || __timeout->tv_nsec < 0)
1585 /* validate tv_usec */
1589 /* init saved fds */
1592 saved_readfds = *__readfds;
1594 memcpy (&saved_readfds, __readfds, sizeof (*__readfds));
1599 FD_ZERO (&saved_readfds);
1604 saved_writefds = *__writefds;
1606 memcpy (&saved_writefds, __writefds, sizeof (*__writefds));
1612 FD_ZERO (&saved_writefds);
1617 saved_exceptfds = *__exceptfds;
1619 memcpy (&saved_exceptfds, __exceptfds, sizeof (*__exceptfds));
1625 FD_ZERO (&saved_exceptfds);
1628 /* clear vcom fds */
1629 nfd = vcom_fd_clear (__nfds, &new_nfds, __readfds, __writefds, __exceptfds);
1631 /* set to an invalid value */
1634 rv = libc_pselect (new_nfds,
1636 __writefds, __exceptfds, __timeout, __sigmask);
1638 if (new_nfds && rv == -1)
1640 /* on error, the file descriptor sets are unmodified */
1642 *__readfds = saved_readfds;
1644 *__writefds = saved_writefds;
1646 *__exceptfds = saved_exceptfds;
1649 else if ((new_nfds && rv != -1) || (rv == -2))
1651 /* restore vcom fds */
1652 nfd = vcom_fd_set (__nfds,
1657 &saved_readfds, &saved_writefds, &saved_exceptfds);
1662 fprintf (stderr, "[%d] pselect: " "'%04d'='%04d'\n", pid, rv, __nfds);
1669 * Socket specific glibc api
1673 /* Create a new socket of type TYPE in domain DOMAIN, using
1674 * protocol PROTOCOL. If PROTOCOL is zero, one is chosen
1675 * automatically. Returns a file descriptor for the new socket,
1677 * RETURN: a valid file descriptor for the new socket,
1682 vcom_socket (int __domain, int __type, int __protocol)
1684 if (vcom_init () != 0)
1689 return vcom_socket_socket (__domain, __type, __protocol);
1693 socket (int __domain, int __type, int __protocol)
1696 pid_t pid = getpid ();
1697 pthread_t tid = pthread_self ();
1699 /* handle domains implemented by vpp */
1704 /* handle types implemented by vpp */
1705 switch (__type & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
1710 vcom_socket_main_show ();
1711 rv = vcom_socket (__domain, __type, __protocol);
1714 "[%d][%lu (0x%lx)] socket: "
1715 "'%04d'= D='%04d', T='%04d', P='%04d'\n",
1716 pid, (unsigned long) tid, (unsigned long) tid,
1717 rv, __domain, __type, __protocol);
1719 vcom_socket_main_show ();
1729 goto CALL_GLIBC_SOCKET_API;
1736 goto CALL_GLIBC_SOCKET_API;
1740 CALL_GLIBC_SOCKET_API:
1741 return libc_socket (__domain, __type, __protocol);
1745 * Create two new sockets, of type TYPE in domain DOMAIN and using
1746 * protocol PROTOCOL, which are connected to each other, and put file
1747 * descriptors for them in FDS[0] and FDS[1]. If PROTOCOL is zero,
1748 * one will be chosen automatically.
1749 * Returns 0 on success, -1 for errors.
1752 vcom_socketpair (int __domain, int __type, int __protocol, int __fds[2])
1754 if (vcom_init () != 0)
1759 return vcom_socket_socketpair (__domain, __type, __protocol, __fds);
1763 socketpair (int __domain, int __type, int __protocol, int __fds[2])
1766 pid_t pid = getpid ();
1768 /* handle domains implemented by vpp */
1773 /* handle types implemented by vpp */
1778 rv = vcom_socketpair (__domain, __type, __protocol, __fds);
1782 "'%04d'= D='%04d', T='%04d', P='%04d'\n",
1783 pid, rv, __domain, __type, __protocol);
1793 goto CALL_GLIBC_SOCKET_API;
1800 goto CALL_GLIBC_SOCKET_API;
1804 CALL_GLIBC_SOCKET_API:
1805 return libc_socketpair (__domain, __type, __protocol, __fds);
1809 * Give the socket FD the local address ADDR
1810 * (which is LEN bytes long).
1813 vcom_bind (int __fd, __CONST_SOCKADDR_ARG __addr, socklen_t __len)
1817 if (vcom_init () != 0)
1822 /* validate __len */
1823 switch (__addr->sa_family)
1826 if (__len != sizeof (struct sockaddr_in))
1830 if (__len != sizeof (struct sockaddr_in6))
1839 /* handle domains implemented by vpp */
1840 switch (__addr->sa_family)
1844 rv = vcom_socket_bind (__fd, __addr, __len);
1857 bind (int __fd, __CONST_SOCKADDR_ARG __addr, socklen_t __len)
1860 pid_t pid = getpid ();
1862 if (is_vcom_socket_fd (__fd))
1865 rv = vcom_bind (__fd, __addr, __len);
1869 "'%04d'='%04d', '%p', '%04d'\n",
1870 pid, rv, __fd, __addr, __len);
1878 return libc_bind (__fd, __addr, __len);
1882 * Put the local address of FD into *ADDR and its length in *LEN.
1885 vcom_getsockname (int __fd, __SOCKADDR_ARG __addr,
1886 socklen_t * __restrict __len)
1888 if (vcom_init () != 0)
1893 return vcom_socket_getsockname (__fd, __addr, __len);
1897 getsockname (int __fd, __SOCKADDR_ARG __addr, socklen_t * __restrict __len)
1900 pid_t pid = getpid ();
1902 if (is_vcom_socket_fd (__fd))
1904 rv = vcom_getsockname (__fd, __addr, __len);
1907 "[%d] getsockname: "
1908 "'%04d'='%04d', '%p', '%p'\n", pid, rv, __fd, __addr, __len);
1916 return libc_getsockname (__fd, __addr, __len);
1920 * Open a connection on socket FD to peer at ADDR
1921 * (which LEN bytes long). For connectionless socket types, just set
1922 * the default address to send to and the only address from which to
1923 * accept transmissions. Return 0 on success, -1 for errors.
1924 * This function is a cancellation point and therefore not marked
1928 vcom_connect (int __fd, __CONST_SOCKADDR_ARG __addr, socklen_t __len)
1932 if (vcom_init () != 0)
1937 /* validate __len */
1938 switch (__addr->sa_family)
1941 if (__len != INET_ADDRSTRLEN)
1945 if (__len != INET6_ADDRSTRLEN)
1954 /* handle domains implemented by vpp */
1955 switch (__addr->sa_family)
1959 rv = vcom_socket_connect (__fd, __addr, __len);
1971 connect (int __fd, __CONST_SOCKADDR_ARG __addr, socklen_t __len)
1974 pid_t pid = getpid ();
1975 pthread_t tid = pthread_self ();
1977 if (is_vcom_socket_fd (__fd))
1979 rv = vcom_connect (__fd, __addr, __len);
1982 "[%d][%lu (0x%lx)] connect: "
1983 "'%04d'='%04d', '%p', '%04d'\n",
1984 pid, (unsigned long) tid, (unsigned long) tid,
1985 rv, __fd, __addr, __len);
1994 return libc_connect (__fd, __addr, __len);
1998 * Put the address of the peer connected to socket FD into *ADDR
1999 * (which is *LEN bytes long), and its actual length into *LEN.
2002 vcom_getpeername (int __fd, __SOCKADDR_ARG __addr,
2003 socklen_t * __restrict __len)
2005 if (vcom_init () != 0)
2010 return vcom_socket_getpeername (__fd, __addr, __len);
2014 getpeername (int __fd, __SOCKADDR_ARG __addr, socklen_t * __restrict __len)
2017 pid_t pid = getpid ();
2019 if (is_vcom_socket_fd (__fd))
2021 rv = vcom_getpeername (__fd, __addr, __len);
2024 "[%d] getpeername: "
2025 "'%04d'='%04d', '%p', '%p'\n", pid, rv, __fd, __addr, __len);
2033 return libc_getpeername (__fd, __addr, __len);
2037 * Send N bytes of BUF to socket FD. Returns the number sent or -1.
2038 * This function is a cancellation point and therefore not marked
2042 vcom_send (int __fd, const void *__buf, size_t __n, int __flags)
2045 if (vcom_init () != 0)
2050 return vcom_socket_send (__fd, (void *) __buf, (int) __n, __flags);
2054 send (int __fd, const void *__buf, size_t __n, int __flags)
2057 pid_t pid = getpid ();
2059 if (is_vcom_socket_fd (__fd))
2061 size = vcom_send (__fd, __buf, __n, __flags);
2065 "'%04d'='%04d', '%p', '%04d', '%04x'\n",
2066 pid, (int) size, __fd, __buf, (int) __n, __flags);
2074 return libc_send (__fd, __buf, __n, __flags);
2078 * Read N bytes into BUF from socket FD.
2079 * Returns the number read or -1 for errors.
2080 * This function is a cancellation point and therefore not marked
2084 vcom_recv (int __fd, void *__buf, size_t __n, int __flags)
2086 if (vcom_init () != 0)
2091 return vcom_socket_recv (__fd, __buf, __n, __flags);
2095 recv (int __fd, void *__buf, size_t __n, int __flags)
2098 pid_t pid = getpid ();
2100 if (is_vcom_socket_fd (__fd))
2102 size = vcom_recv (__fd, __buf, __n, __flags);
2106 "'%04d'='%04d', '%p', '%04d', '%04x'\n",
2107 pid, (int) size, __fd, __buf, (int) __n, __flags);
2115 return libc_recv (__fd, __buf, __n, __flags);
2119 * Send N bytes of BUF on socket FD to peer at address ADDR (which is
2120 * ADDR_LEN bytes long). Returns the number sent, or -1 for errors.
2121 * This function is a cancellation point and therefore not marked
2125 vcom_sendto (int __fd, const void *__buf, size_t __n, int __flags,
2126 __CONST_SOCKADDR_ARG __addr, socklen_t __addr_len)
2128 if (vcom_init () != 0)
2133 return vcom_socket_sendto (__fd, __buf, __n, __flags, __addr, __addr_len);
2137 sendto (int __fd, const void *__buf, size_t __n, int __flags,
2138 __CONST_SOCKADDR_ARG __addr, socklen_t __addr_len)
2141 pid_t pid = getpid ();
2143 if (is_vcom_socket_fd (__fd))
2145 size = vcom_sendto (__fd, __buf, __n, __flags, __addr, __addr_len);
2149 "'%04d'='%04d', '%p', '%04d', '%04x', "
2151 pid, (int) size, __fd, __buf, (int) __n, __flags,
2152 __addr, __addr_len);
2160 return libc_sendto (__fd, __buf, __n, __flags, __addr, __addr_len);
2164 * Read N bytes into BUF through socket FD.
2165 * If ADDR is not NULL, fill in *ADDR_LEN bytes of it with the
2166 * address of the sender, and store the actual size of the address
2168 * Returns the number of bytes read or -1 for errors.
2169 * This function is a cancellation point and therefore not marked
2173 vcom_recvfrom (int __fd, void *__restrict __buf, size_t __n,
2175 __SOCKADDR_ARG __addr, socklen_t * __restrict __addr_len)
2177 if (vcom_init () != 0)
2182 return vcom_socket_recvfrom (__fd, __buf, __n, __flags, __addr, __addr_len);
2186 recvfrom (int __fd, void *__restrict __buf, size_t __n,
2188 __SOCKADDR_ARG __addr, socklen_t * __restrict __addr_len)
2191 pid_t pid = getpid ();
2193 if (is_vcom_socket_fd (__fd))
2195 size = vcom_recvfrom (__fd, __buf, __n, __flags, __addr, __addr_len);
2199 "'%04d'='%04d', '%p', '%04d', '%04x', "
2201 pid, (int) size, __fd, __buf, (int) __n, __flags,
2202 __addr, __addr_len);
2210 return libc_recvfrom (__fd, __buf, __n, __flags, __addr, __addr_len);
2214 * Send a message described MESSAGE on socket FD.
2215 * Returns the number of bytes sent, or -1 for errors.
2216 * This function is a cancellation point and therefore not marked
2220 vcom_sendmsg (int __fd, const struct msghdr * __message, int __flags)
2222 if (vcom_init () != 0)
2227 return vcom_socket_sendmsg (__fd, __message, __flags);
2231 sendmsg (int __fd, const struct msghdr * __message, int __flags)
2234 pid_t pid = getpid ();
2236 if (is_vcom_socket_fd (__fd))
2238 size = vcom_sendmsg (__fd, __message, __flags);
2242 "'%04d'='%04d', '%p', '%04x'\n",
2243 pid, (int) size, __fd, __message, __flags);
2251 return libc_sendmsg (__fd, __message, __flags);
2256 * Send a VLEN messages as described by VMESSAGES to socket FD.
2257 * Returns the number of datagrams successfully written
2259 * This function is a cancellation point and therefore not marked
2263 vcom_sendmmsg (int __fd, struct mmsghdr *__vmessages,
2264 unsigned int __vlen, int __flags)
2266 if (vcom_init () != 0)
2271 return vcom_socket_sendmmsg (__fd, __message, __vlen, __flags);
2275 sendmmsg (int __fd, struct mmsghdr *__vmessages,
2276 unsigned int __vlen, int __flags)
2279 pid_t pid = getpid ();
2281 if (is_vcom_socket_fd (__fd))
2283 size = vcom_sendmmsg (__fd, __message, __vlen, __flags);
2287 "'%04d'='%04d', '%p', '%04d', '%04x'\n",
2288 pid, (int) size, __fd, __vmessages, __vlen, __flags);
2296 return libc_sendmmsg (__fd, __message, __vlen, __flags);
2302 * Receive a message as described by MESSAGE from socket FD.
2303 * Returns the number of bytes read or -1 for errors.
2304 * This function is a cancellation point and therefore not marked
2308 vcom_recvmsg (int __fd, struct msghdr * __message, int __flags)
2310 if (vcom_init () != 0)
2315 return vcom_socket_recvmsg (__fd, __message, __flags);
2319 recvmsg (int __fd, struct msghdr * __message, int __flags)
2322 pid_t pid = getpid ();
2324 if (is_vcom_socket_fd (__fd))
2326 size = vcom_recvmsg (__fd, __message, __flags);
2330 "'%04d'='%04d', '%p', '%04x'\n",
2331 pid, (int) size, __fd, __message, __flags);
2339 return libc_recvmsg (__fd, __message, __flags);
2344 * Receive up to VLEN messages as described by VMESSAGES from socket FD.
2345 * Returns the number of messages received or -1 for errors.
2346 * This function is a cancellation point and therefore not marked
2350 vcom_recvmmsg (int __fd, struct mmsghdr *__vmessages,
2351 unsigned int __vlen, int __flags, struct timespec *__tmo)
2353 if (vcom_init () != 0)
2358 return vcom_socket_recvmmsg (__fd, __message, __vlen, __flags, __tmo);
2362 recvmmsg (int __fd, struct mmsghdr *__vmessages,
2363 unsigned int __vlen, int __flags, struct timespec *__tmo)
2366 pid_t pid = getpid ();
2368 if (is_vcom_socket_fd (__fd))
2370 size = vcom_recvmmsg (__fd, __message, __vlen, __flags, __tmo);
2374 "'%04d'='%04d', '%p', "
2375 "'%04d', '%04x', '%p'\n",
2376 pid, (int) size, __fd, __vmessages, __vlen, __flags, __tmo);
2384 return libc_recvmmsg (__fd, __message, __vlen, __flags, __tmo);
2390 * Put the current value for socket FD's option OPTNAME
2391 * at protocol level LEVEL into OPTVAL (which is *OPTLEN bytes long),
2392 * and set *OPTLEN to the value's actual length.
2393 * Returns 0 on success, -1 for errors.
2396 vcom_getsockopt (int __fd, int __level, int __optname,
2397 void *__restrict __optval, socklen_t * __restrict __optlen)
2399 if (vcom_init () != 0)
2404 return vcom_socket_getsockopt (__fd, __level, __optname,
2405 __optval, __optlen);
2409 getsockopt (int __fd, int __level, int __optname,
2410 void *__restrict __optval, socklen_t * __restrict __optlen)
2413 pid_t pid = getpid ();
2415 if (is_vcom_socket_fd (__fd))
2417 rv = vcom_getsockopt (__fd, __level, __optname, __optval, __optlen);
2421 "'%04d'='%04d', '%04d', '%04d', "
2423 pid, rv, __fd, __level, __optname, __optval, __optlen);
2431 return libc_getsockopt (__fd, __level, __optname, __optval, __optlen);
2435 * Set socket FD's option OPTNAME at protocol level LEVEL
2436 * to *OPTVAL (which is OPTLEN bytes long).
2437 * Returns 0 on success, -1 for errors.
2440 vcom_setsockopt (int __fd, int __level, int __optname,
2441 const void *__optval, socklen_t __optlen)
2443 if (vcom_init () != 0)
2448 return vcom_socket_setsockopt (__fd, __level, __optname,
2449 __optval, __optlen);
2453 setsockopt (int __fd, int __level, int __optname,
2454 const void *__optval, socklen_t __optlen)
2457 pid_t pid = getpid ();
2459 if (is_vcom_socket_fd (__fd))
2461 rv = vcom_setsockopt (__fd, __level, __optname, __optval, __optlen);
2465 "'%04d'='%04d', '%04d', '%04d', "
2467 pid, rv, __fd, __level, __optname, __optval, __optlen);
2475 return libc_setsockopt (__fd, __level, __optname, __optval, __optlen);
2479 * Prepare to accept connections on socket FD.
2480 * N connection requests will be queued before further
2481 * requests are refused.
2482 * Returns 0 on success, -1 for errors.
2485 vcom_listen (int __fd, int __n)
2487 if (vcom_init () != 0)
2492 return vcom_socket_listen (__fd, __n);
2496 listen (int __fd, int __n)
2499 pid_t pid = getpid ();
2501 if (is_vcom_socket_fd (__fd))
2503 rv = vcom_listen (__fd, __n);
2507 "'%04d'='%04d', '%04d'\n", pid, rv, __fd, __n);
2515 return libc_listen (__fd, __n);
2519 * Await a connection on socket FD.
2520 * When a connection arrives, open a new socket to communicate
2521 * with it, set *ADDR (which is *ADDR_LEN bytes long) to the address
2522 * of the connecting peer and *ADDR_LEN to the address's actual
2523 * length, and return the new socket's descriptor, or -1 for errors.
2524 * This function is a cancellation point and therefore not marked
2528 vcom_accept (int __fd, __SOCKADDR_ARG __addr,
2529 socklen_t * __restrict __addr_len)
2532 if (vcom_init () != 0)
2536 return vcom_socket_accept (__fd, __addr, __addr_len);
2540 accept (int __fd, __SOCKADDR_ARG __addr, socklen_t * __restrict __addr_len)
2543 pid_t pid = getpid ();
2544 pthread_t tid = pthread_self ();
2546 if (is_vcom_socket_fd (__fd))
2549 vcom_socket_main_show ();
2552 "[%d][%lu (0x%lx)] accept1: "
2553 "'%04d'='%04d', '%p', '%p'\n",
2554 pid, (unsigned long) tid, (unsigned long) tid,
2555 rv, __fd, __addr, __addr_len);
2556 rv = vcom_accept (__fd, __addr, __addr_len);
2559 "[%d][%lu (0x%lx)] accept2: "
2560 "'%04d'='%04d', '%p', '%p'\n",
2561 pid, (unsigned long) tid, (unsigned long) tid,
2562 rv, __fd, __addr, __addr_len);
2564 vcom_socket_main_show ();
2572 return libc_accept (__fd, __addr, __addr_len);
2577 * Similar to 'accept' but takes an additional parameter to specify
2579 * This function is a cancellation point and therefore not marked
2583 vcom_accept4 (int __fd, __SOCKADDR_ARG __addr,
2584 socklen_t * __restrict __addr_len, int __flags)
2587 if (vcom_init () != 0)
2592 return vcom_socket_accept4 (__fd, __addr, __addr_len, __flags);
2596 accept4 (int __fd, __SOCKADDR_ARG __addr,
2597 socklen_t * __restrict __addr_len, int __flags)
2600 pid_t pid = getpid ();
2602 if (is_vcom_socket_fd (__fd))
2605 vcom_socket_main_show ();
2606 rv = vcom_accept4 (__fd, __addr, __addr_len, __flags);
2610 "'%04d'='%04d', '%p', '%p', '%04x'\n",
2611 pid, rv, __fd, __addr, __addr_len, __flags);
2613 vcom_socket_main_show ();
2621 return libc_accept4 (__fd, __addr, __addr_len, __flags);
2627 * Shut down all or part of the connection open on socket FD.
2628 * HOW determines what to shut down:
2629 * SHUT_RD = No more receptions;
2630 * SHUT_WR = No more transmissions;
2631 * SHUT_RDWR = No more receptions or transmissions.
2632 * Returns 0 on success, -1 for errors.
2635 vcom_shutdown (int __fd, int __how)
2637 if (vcom_init () != 0)
2641 return vcom_socket_shutdown (__fd, __how);
2645 shutdown (int __fd, int __how)
2648 pid_t pid = getpid ();
2650 if (is_vcom_socket_fd (__fd))
2652 rv = vcom_shutdown (__fd, __how);
2656 "'%04d'='%04d', '%04d'\n", pid, rv, __fd, __how);
2664 return libc_shutdown (__fd, __how);
2668 vcom_epoll_create (int __size)
2671 if (vcom_init () != 0)
2681 /* __size argument is ignored "thereafter" */
2682 return vcom_epoll_create1 (0);
2686 * __size argument is ignored, but must be greater than zero
2689 epoll_create (int __size)
2692 pid_t pid = getpid ();
2694 rv = vcom_epoll_create (__size);
2697 "[%d] epoll_create: " "'%04d'='%04d'\n", pid, rv, __size);
2707 vcom_epoll_create1 (int __flags)
2709 if (vcom_init () != 0)
2718 if (__flags & ~EPOLL_CLOEXEC)
2722 /* __flags can be either zero or EPOLL_CLOEXEC */
2723 /* implementation */
2724 return vcom_socket_epoll_create1 (__flags);
2728 * __flags can be either zero or EPOLL_CLOEXEC
2731 epoll_create1 (int __flags)
2734 pid_t pid = getpid ();
2736 rv = vcom_epoll_create1 (__flags);
2739 "[%d] epoll_create: " "'%04d'='%08x'\n", pid, rv, __flags);
2749 ep_op_has_event (int op)
2751 return op != EPOLL_CTL_DEL;
2755 vcom_epoll_ctl (int __epfd, int __op, int __fd, struct epoll_event *__event)
2757 if (vcom_init () != 0)
2763 * the requested operation __op is not supported
2764 * by this interface */
2765 if (!((__op == EPOLL_CTL_ADD) ||
2766 (__op == EPOLL_CTL_MOD) || (__op == EPOLL_CTL_DEL)))
2771 /* op is ADD or MOD but event parameter is NULL */
2772 if ((ep_op_has_event (__op) && !__event))
2777 /* fd is same as epfd */
2778 /* do not permit adding an epoll file descriptor inside itself */
2784 /* implementation */
2785 return vcom_socket_epoll_ctl (__epfd, __op, __fd, __event);
2789 * implement the controller interface for epoll
2790 * that enables the insertion/removal/change of
2791 * file descriptors inside the interest set.
2794 epoll_ctl (int __epfd, int __op, int __fd, struct epoll_event *__event)
2797 pid_t pid = getpid ();
2799 if (is_vcom_epfd (__epfd))
2801 /* TBD: currently limiting epoll to support only vcom fds */
2802 if (is_vcom_socket_fd (__fd))
2804 rv = vcom_epoll_ctl (__epfd, __op, __fd, __event);
2808 "'%04d'='%04d', '%04d', '%04d'\n",
2809 pid, rv, __epfd, __op, __fd);
2820 * TBD: currently epoll does not support kernel fds
2828 /* epfd is not an epoll file descriptor */
2836 vcom_epoll_wait (int __epfd, struct epoll_event *__events,
2837 int __maxevents, int __timeout)
2839 if (vcom_init () != 0)
2844 return vcom_epoll_pwait (__epfd, __events, __maxevents, __timeout, NULL);
2848 epoll_wait (int __epfd, struct epoll_event *__events,
2849 int __maxevents, int __timeout)
2852 pid_t pid = getpid ();
2854 if (__maxevents <= 0 || __maxevents > EP_MAX_EVENTS)
2860 if (is_vcom_epfd (__epfd))
2862 rv = vcom_epoll_wait (__epfd, __events, __maxevents, __timeout);
2866 "'%04d'='%04d', '%p', "
2868 pid, rv, __epfd, __events, __maxevents, __timeout);
2886 vcom_epoll_pwait (int __epfd, struct epoll_event *__events,
2887 int __maxevents, int __timeout, const __sigset_t * __ss)
2889 if (vcom_init () != 0)
2894 /* implementation */
2895 return vcom_socket_epoll_pwait (__epfd, __events,
2896 __maxevents, __timeout, __ss);
2900 epoll_pwait (int __epfd, struct epoll_event *__events,
2901 int __maxevents, int __timeout, const __sigset_t * __ss)
2904 pid_t pid = getpid ();
2906 if (__maxevents <= 0 || __maxevents > EP_MAX_EVENTS)
2912 if (is_vcom_epfd (__epfd))
2914 rv = vcom_epoll_pwait (__epfd, __events, __maxevents, __timeout, __ss);
2917 "[%d] epoll_pwait: "
2918 "'%04d'='%04d', '%p', "
2921 pid, rv, __epfd, __events, __maxevents, __timeout, __ss);
2938 /* Poll the file descriptors described by the NFDS structures starting at
2939 FDS. If TIMEOUT is nonzero and not -1, allow TIMEOUT milliseconds for
2940 an event to occur; if TIMEOUT is -1, block until an event occurs.
2941 Returns the number of file descriptors with events, zero if timed out,
2944 This function is a cancellation point and therefore not marked with
2948 vcom_poll (struct pollfd *__fds, nfds_t __nfds, int __timeout)
2951 pid_t pid = getpid ();
2953 struct rlimit nofile_limit;
2954 struct pollfd vcom_fds[MAX_POLL_NFDS_DEFAULT];
2957 /* actual set of file descriptors to be monitored */
2958 nfds_t libc_nfds = 0;
2959 nfds_t vcom_nfds = 0;
2961 /* ready file descriptors
2963 * number of structures which have nonzero revents fields
2964 * in other words, descriptors with events or errors reported.
2966 /* after call to libc_poll () */
2968 /* after call to vcom_socket_poll () */
2972 /* timeout value in units of timespec */
2973 struct timespec timeout_ts;
2974 struct timespec start_time, now, end_time;
2977 /* get start_time */
2978 rv = clock_gettime (CLOCK_MONOTONIC, &start_time);
2985 /* set timeout_ts & end_time */
2988 /* set timeout_ts */
2989 timeout_ts.tv_sec = __timeout / MSEC_PER_SEC;
2990 timeout_ts.tv_nsec = (__timeout % MSEC_PER_SEC) * NSEC_PER_MSEC;
2991 set_normalized_timespec (&timeout_ts,
2992 timeout_ts.tv_sec, timeout_ts.tv_nsec);
2996 end_time = timespec_add (start_time, timeout_ts);
3000 end_time = start_time;
3004 if (vcom_init () != 0)
3010 /* validate __fds */
3017 /* validate __nfds */
3018 /*TBD: call getrlimit once when vcl-ldpreload library is init */
3019 rv = getrlimit (RLIMIT_NOFILE, &nofile_limit);
3025 if (__nfds >= nofile_limit.rlim_cur)
3032 * for the POC, it's fair to assume that nfds is less than 1024
3034 if (__nfds >= MAX_POLL_NFDS_DEFAULT)
3040 /* set revents field (output parameter)
3043 for (fds_idx = 0; fds_idx < __nfds; fds_idx++)
3045 __fds[fds_idx].revents = 0;
3049 /* set revents field (output parameter)
3050 * to zero for user ignored fds
3052 for (fds_idx = 0; fds_idx < __nfds; fds_idx++)
3055 * if negative fd, ignore events field
3056 * and set output parameter (revents field) to zero */
3057 if (__fds[fds_idx].fd < 0)
3059 __fds[fds_idx].revents = 0;
3065 * 00. prepare __fds and vcom_fds for polling
3066 * copy __fds to vcom_fds
3067 * 01. negate all except libc fds in __fds,
3068 * ignore user negated fds
3069 * 02. negate all except vcom_fds in vocm fds,
3070 * ignore user negated fds
3071 * ignore fd 0 by setting it to negative number
3073 memcpy (vcom_fds, __fds, sizeof (*__fds) * __nfds);
3076 for (fds_idx = 0; fds_idx < __nfds; fds_idx++)
3078 /* ignore negative fds */
3079 if (__fds[fds_idx].fd < 0)
3085 * 00. ignore vcom fds in __fds
3086 * 01. ignore libc fds in vcom_fds,
3087 * ignore fd 0 by setting it to negative number.
3088 * as fd 0 cannot be ignored.
3090 if (is_vcom_socket_fd (__fds[fds_idx].fd) ||
3091 is_vcom_epfd (__fds[fds_idx].fd))
3093 __fds[fds_idx].fd = -__fds[fds_idx].fd;
3099 /* ignore fd 0 by setting it to negative number */
3100 if (!vcom_fds[fds_idx].fd)
3102 vcom_fds[fds_idx].fd = -1;
3104 vcom_fds[fds_idx].fd = -vcom_fds[fds_idx].fd;
3111 * poll on libc fds and vcom fds
3113 * specifying a timeout of zero causes libc_poll() and
3114 * vcom_socket_poll() to return immediately, even if no
3115 * file descriptors are ready
3123 * timeout parameter for libc_poll () set to zero
3124 * to poll on libc fds
3127 /* poll on libc fds */
3131 * a timeout of zero causes libc_poll()
3132 * to return immediately
3134 rlibc_nfds = libc_poll (__fds, __nfds, 0);
3138 "'%04d'='%08lu'\n", pid, rlibc_nfds, __nfds);
3143 goto poll_done_update_nfds;
3148 * timeout parameter for vcom_socket_poll () set to zero
3149 * to poll on vcom fds
3152 /* poll on vcom fds */
3156 * a timeout of zero causes vcom_socket_poll()
3157 * to return immediately
3159 rvcom_nfds = vcom_socket_poll (vcom_fds, __nfds, 0);
3163 "'%04d'='%08lu'\n", pid, rvcom_nfds, __nfds);
3167 goto poll_done_update_nfds;
3171 /* check if any file descriptors changed status */
3172 if ((libc_nfds && rlibc_nfds > 0) || (vcom_nfds && rvcom_nfds > 0))
3174 /* something interesting happened */
3175 rv = rlibc_nfds + rvcom_nfds;
3176 goto poll_done_update_nfds;
3179 rv = clock_gettime (CLOCK_MONOTONIC, &now);
3183 goto poll_done_update_nfds;
3187 /* block indefinitely || timeout elapsed */
3188 while ((__timeout < 0) || timespec_compare (&now, &end_time) < 0);
3190 /* timeout expired before anything interesting happened */
3193 poll_done_update_nfds:
3194 for (fds_idx = 0; fds_idx < __nfds; fds_idx++)
3196 /* ignore negative fds in vcom_fds
3197 * 00. user negated fds
3200 if (vcom_fds[fds_idx].fd < 0)
3205 /* from here on handle positive vcom fds */
3207 * restore vcom fds to positive number in __fds
3208 * and update revents in __fds with the events
3209 * that actually occurred in vcom fds
3211 __fds[fds_idx].fd = -__fds[fds_idx].fd;
3214 __fds[fds_idx].revents = vcom_fds[fds_idx].revents;
3220 fprintf (stderr, "[%d] vpoll: " "'%04d'='%08lu'\n", pid, rv, __nfds);
3225 * 00. The field __fds[i].fd contains a file descriptor for an
3227 * If this field is negative, then the corresponding
3228 * events field is ignored and the revents field returns zero.
3229 * The field __fds[i].events is an input parameter.
3230 * The field __fds[i].revents is an output parameter.
3231 * 01. Specifying a negative value in timeout
3232 * means an infinite timeout.
3233 * Specifying a timeout of zero causes poll() to return
3234 * immediately, even if no file descriptors are ready.
3236 * NOTE: observed __nfds is less than 128 from kubecon strace files
3241 poll (struct pollfd *__fds, nfds_t __nfds, int __timeout)
3244 pid_t pid = getpid ();
3248 fprintf (stderr, "[%d] poll1: " "'%04d'='%08lu, %d, 0x%x'\n",
3249 pid, rv, __nfds, __fds[0].fd, __fds[0].events);
3250 rv = vcom_poll (__fds, __nfds, __timeout);
3252 fprintf (stderr, "[%d] poll2: " "'%04d'='%08lu, %d, 0x%x'\n",
3253 pid, rv, __nfds, __fds[0].fd, __fds[0].revents);
3263 /* Like poll, but before waiting the threads signal mask is replaced
3264 with that specified in the fourth parameter. For better usability,
3265 the timeout value is specified using a TIMESPEC object.
3267 This function is a cancellation point and therefore not marked with
3270 vcom_ppoll (struct pollfd *__fds, nfds_t __nfds,
3271 const struct timespec *__timeout, const __sigset_t * __ss)
3273 if (vcom_init () != 0)
3282 ppoll (struct pollfd *__fds, nfds_t __nfds,
3283 const struct timespec *__timeout, const __sigset_t * __ss)
3293 void CONSTRUCTOR_ATTRIBUTE vcom_constructor (void);
3295 void DESTRUCTOR_ATTRIBUTE vcom_destructor (void);
3298 vcom_constructor (void)
3300 pid_t pid = getpid ();
3302 swrap_constructor ();
3303 if (vcom_init () != 0)
3305 printf ("\n[%d] vcom_constructor...failed!\n", pid);
3309 printf ("\n[%d] vcom_constructor...done!\n", pid);
3314 * This function is called when the library is unloaded
3317 vcom_destructor (void)
3319 pid_t pid = getpid ();
3322 swrap_destructor ();
3323 printf ("\n[%d] vcom_destructor...done!\n", pid);
3328 * fd.io coding-style-patch-verification: ON
3331 * eval: (c-set-style "gnu")