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[92.41.10.184]) by smtp.gmail.com with ESMTPSA id g11sm27438329wri.59.2021.05.11.02.20.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 May 2021 02:20:09 -0700 (PDT) Date: Tue, 11 May 2021 10:20:07 +0100 From: Torin Cooper-Bennun To: Marc Kleine-Budde Cc: linux-can@vger.kernel.org, netdev@vger.kernel.org Subject: Re: CAN: TX frames marked as RX after the sending socket is closed Message-ID: <20210511092007.t6beiemeufvhu46n@bigthink> References: <20210510142302.ijbwowv4usoiqkxq@bigthink> <20210510153540.52uzcndqyp6yu7ve@pengutronix.de> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="u32vfygc3h2c6apd" Content-Disposition: inline In-Reply-To: <20210510153540.52uzcndqyp6yu7ve@pengutronix.de> Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org --u32vfygc3h2c6apd Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, May 10, 2021 at 05:35:40PM +0200, Marc Kleine-Budde wrote: > Can you provide the program to reproduce the issue? See attached below this email (tx only, rx done with candump). > Have you increased the CAN interface's txqueuelen? Yup, qlen is 1000. -- Regards, Torin Cooper-Bennun Software Engineer | maxiluxsystems.com --u32vfygc3h2c6apd Content-Type: text/x-csrc; charset=us-ascii Content-Disposition: attachment; filename="tx_rx_bug.c" #include #include #include #include #include #include #include #include #include #include int main(int argc, char *argv[]) { const char *if_name = "can0"; int sockfd; struct ifreq req = {}; struct sockaddr_can sockaddr = {}; struct can_frame frame = {}; struct timeval tv; char timestr[16]; sockfd = socket(AF_CAN, SOCK_RAW, CAN_RAW); strncpy(req.ifr_name, if_name, IF_NAMESIZE); ioctl(sockfd, SIOCGIFINDEX, &req); sockaddr.can_family = AF_CAN; sockaddr.can_ifindex = req.ifr_ifindex; bind(sockfd, (const struct sockaddr *) &sockaddr, sizeof(sockaddr)); frame.can_dlc = 8; memset(frame.data, 0xee, 8); for (int i = 0; i < 1000; ++i) { frame.can_id = (i & 0x7ff); send(sockfd, &frame, sizeof(frame), 0); } close(sockfd); gettimeofday(&tv, NULL); strftime(timestr, sizeof(timestr), "%H:%M:%S", localtime(&tv.tv_sec)); printf("Socket closed at %s.%06ld\n", timestr, tv.tv_usec); return 0; } --u32vfygc3h2c6apd--