Date: Thu, 8 Dec 2016 13:41:13 +0100 From: Dimitri Staessens <dimitri.staessens@intec.ugent.be> To: freebsd-bugs@freebsd.org Subject: Call to accept() does not time out when setting SO_RCVTIMEO on a socket Message-ID: <76cee3a4-18d0-1f8c-eda3-e19c496c39b6@intec.ugent.be>
next in thread | raw e-mail | index | archive | help
Dear devs, I'm trying to get an accept() call to time out using setsockopt. On Linux, the example below terminates: [dstaesse@phoneutria]$ gcc accept_st.c -o accept_st [dstaesse@phoneutria]$ ./accept_st Timeout is 0:100000. Check is 0:103333. Accept returned: Resource temporarily unavailable. Accept returned: Resource temporarily unavailable. Accept returned: Resource temporarily unavailable. Bye. On FreeBSD 11.0-RELEASE however, it hangs on the accept() forever. Is this a known issue? Thanks for your help, Dimitri --- example source: #define _POSIX_C_SOURCE 200809L #include <stdlib.h> #include <stdio.h> #include <string.h> #include <unistd.h> #include <errno.h> #include <sys/time.h> #include <sys/socket.h> #include <sys/un.h> #define TIMEOUT 100 /* ms */ #define RUNNING 0 #define SHUTDOWN 1 #define FN "/tmp/accept_st_socket" int sfd; void main(void) { int count = 0; int cfd; struct timeval tv = {(TIMEOUT / 1000), (TIMEOUT % 1000) * 1000}; struct timeval check; socklen_t len = sizeof(check); struct sockaddr_un serv_addr; printf("Timeout is %lu:%lu.\n", tv.tv_sec, tv.tv_usec); sfd = socket(AF_UNIX, SOCK_STREAM, 0); if (sfd < 0) { printf("Failed to open socket: %s.\n", strerror(errno)); exit(EXIT_FAILURE); } if (access(FN, F_OK) != -1) { /* File exists */ if (unlink(FN)) exit(EXIT_FAILURE); } serv_addr.sun_family = AF_UNIX; sprintf(serv_addr.sun_path, "%s", FN); if (bind(sfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr))) { printf("Failed to bind socket: %s.\n", strerror(errno)); close(sfd); exit(EXIT_FAILURE); } if (listen(sfd, 0)) { printf("Failed to listen on socket: %s.\n", strerror(errno)); close(sfd); exit(EXIT_FAILURE); } if (setsockopt(sfd, SOL_SOCKET, SO_RCVTIMEO, (void *) &tv, len)) printf("Failed to set timeout on socket: %s.\n", strerror(errno)); getsockopt(sfd, SOL_SOCKET, SO_RCVTIMEO, &check, &len); printf("Check is %lu:%lu.\n", check.tv_sec, check.tv_usec); while (count < 3) { cfd = accept(sfd, 0, 0); printf("Accept returned: %s.\n", strerror(errno)); ++count; } printf("Bye.\n"); exit(EXIT_SUCCESS); } -- Dimitri Staessens Ghent University - imec Dept. of Information Technology (INTEC) Internet Based Communication Networks and Services Technologiepark 15 9052 Zwijnaarde T: +32 9 331 48 70 F: +32 9 331 48 99
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?76cee3a4-18d0-1f8c-eda3-e19c496c39b6>