/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */ /* * candump.c * * Copyright (c) 2002-2009 Volkswagen Group Electronic Research * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of Volkswagen nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * Alternatively, provided that this notice is retained in full, this * software may be distributed under the terms of the GNU General * Public License ("GPL") version 2, in which case the provisions of the * GPL apply INSTEAD OF those given above. * * The provided data structures and external interfaces from this code * are not restricted to be used by modules with a GPL compatible license. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH * DAMAGE. * * Send feedback to * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "terminal.h" #include "lib.h" /* for hardware timestamps - since Linux 2.6.30 */ #ifndef SO_TIMESTAMPING #define SO_TIMESTAMPING 37 #endif #define TIMESTAMPSZ 50 /* string 'absolute with date' requires max 49 bytes */ #define MAXSOCK 16 /* max. number of CAN interfaces given on the cmdline */ #define MAXIFNAMES 30 /* size of receive name index to omit ioctls */ #define MAXCOL 6 /* number of different colors for colorized output */ #define ANYDEV "any" /* name of interface to receive from any CAN interface */ #define ANL "\r\n" /* newline in ASC mode */ #define SILENT_INI 42 /* detect user setting on commandline */ #define SILENT_OFF 0 /* no silent mode */ #define SILENT_ANI 1 /* silent mode with animation */ #define SILENT_ON 2 /* silent mode (completely silent) */ #define BOLD ATTBOLD #define RED (ATTBOLD FGRED) #define GREEN (ATTBOLD FGGREEN) #define YELLOW (ATTBOLD FGYELLOW) #define BLUE (ATTBOLD FGBLUE) #define MAGENTA (ATTBOLD FGMAGENTA) #define CYAN (ATTBOLD FGCYAN) static const char col_on[MAXCOL][19] = { BLUE, RED, GREEN, BOLD, MAGENTA, CYAN }; static const char col_off[] = ATTRESET; struct if_info { /* bundled information per open socket */ int s; /* socket */ char *cmdlinename; __u32 dropcnt; __u32 last_dropcnt; }; static struct if_info sock_info[MAXSOCK]; static char *progname; static char devname[MAXIFNAMES][IFNAMSIZ+1]; static int dindex[MAXIFNAMES]; static int max_devname_len; /* to prevent frazzled device name output */ static const int canfd_on = 1; #define MAXANI 4 static const char anichar[MAXANI] = { '|', '/', '-', '\\' }; static const char extra_m_info[4][4] = { "- -", "B -", "- E", "B E" }; extern int optind, opterr, optopt; static volatile int running = 1; static volatile sig_atomic_t signal_num; static void print_usage(void) { fprintf(stderr, "%s - dump CAN bus traffic.\n", progname); fprintf(stderr, "\nUsage: %s [options] +\n", progname); fprintf(stderr, " (use CTRL-C to terminate %s)\n\n", progname); fprintf(stderr, "Options:\n"); fprintf(stderr, " -t (timestamp: (a)bsolute/(d)elta/(z)ero/(A)bsolute w date)\n"); fprintf(stderr, " -H (read hardware timestamps instead of system timestamps)\n"); fprintf(stderr, " -c (increment color mode level)\n"); fprintf(stderr, " -i (binary output - may exceed 80 chars/line)\n"); fprintf(stderr, " -a (enable additional ASCII output)\n"); fprintf(stderr, " -S (swap byte order in printed CAN data[] - marked with '%c' )\n", SWAP_DELIMITER); fprintf(stderr, " -s (silent mode - %d: off (default) %d: animation %d: silent)\n", SILENT_OFF, SILENT_ANI, SILENT_ON); fprintf(stderr, " -l (log CAN-frames into file. Sets '-s %d' by default)\n", SILENT_ON); fprintf(stderr, " -f (log CAN-frames into file . Sets '-s %d' by default)\n", SILENT_ON); fprintf(stderr, " -L (use log file format on stdout)\n"); fprintf(stderr, " -n (terminate after reception of CAN frames)\n"); fprintf(stderr, " -r (set socket receive buffer to )\n"); fprintf(stderr, " -D (Don't exit if a \"detected\" can device goes down)\n"); fprintf(stderr, " -d (monitor dropped CAN frames)\n"); fprintf(stderr, " -e (dump CAN error frames in human-readable format)\n"); fprintf(stderr, " -8 (display raw DLC values in {} for Classical CAN)\n"); fprintf(stderr, " -x (print extra message infos, rx/tx brs esi)\n"); fprintf(stderr, " -T (terminate after if no frames were received)\n"); fprintf(stderr, "\n"); fprintf(stderr, "Up to %d CAN interfaces with optional filter sets can be specified\n", MAXSOCK); fprintf(stderr, "on the commandline in the form: [,filter]*\n"); fprintf(stderr, "\nFilters:\n"); fprintf(stderr, " Comma separated filters can be specified for each given CAN interface:\n"); fprintf(stderr, " :\n (matches when & mask == can_id & mask)\n"); fprintf(stderr, " ~\n (matches when & mask != can_id & mask)\n"); fprintf(stderr, " #\n (set error frame filter, see include/linux/can/error.h)\n"); fprintf(stderr, " [j|J]\n (join the given CAN filters - logical AND semantic)\n"); fprintf(stderr, "\nCAN IDs, masks and data content are given and expected in hexadecimal values.\n"); fprintf(stderr, "When the can_id is 8 digits long the CAN_EFF_FLAG is set for 29 bit EFF format.\n"); fprintf(stderr, "Without any given filter all data frames are received ('0:0' default filter).\n"); fprintf(stderr, "\nUse interface name '%s' to receive from all CAN interfaces.\n", ANYDEV); fprintf(stderr, "\nExamples:\n"); fprintf(stderr, "%s -c -c -ta can0,123:7FF,400:700,#000000FF can2,400~7F0 can3 can8\n\n", progname); fprintf(stderr, "%s -l any,0~0,#FFFFFFFF\n (log only error frames but no(!) data frames)\n", progname); fprintf(stderr, "%s -l any,0:0,#FFFFFFFF\n (log error frames and also all data frames)\n", progname); fprintf(stderr, "%s vcan2,12345678:DFFFFFFF\n (match only for extended CAN ID 12345678)\n", progname); fprintf(stderr, "%s vcan2,123:7FF\n (matches CAN ID 123 - including EFF and RTR frames)\n", progname); fprintf(stderr, "%s vcan2,123:C00007FF\n (matches CAN ID 123 - only SFF and non-RTR frames)\n", progname); fprintf(stderr, "\n"); } static void sigterm(int signo) { running = 0; signal_num = signo; } static int idx2dindex(int ifidx, int socket) { int i; struct ifreq ifr; for (i = 0; i < MAXIFNAMES; i++) { if (dindex[i] == ifidx) return i; } /* create new interface index cache entry */ /* remove index cache zombies first */ for (i = 0; i < MAXIFNAMES; i++) { if (dindex[i]) { ifr.ifr_ifindex = dindex[i]; if (ioctl(socket, SIOCGIFNAME, &ifr) < 0) dindex[i] = 0; } } for (i = 0; i < MAXIFNAMES; i++) if (!dindex[i]) /* free entry */ break; if (i == MAXIFNAMES) { fprintf(stderr, "Interface index cache only supports %d interfaces.\n", MAXIFNAMES); exit(1); } dindex[i] = ifidx; ifr.ifr_ifindex = ifidx; if (ioctl(socket, SIOCGIFNAME, &ifr) < 0) perror("SIOCGIFNAME"); if (max_devname_len < (int)strlen(ifr.ifr_name)) max_devname_len = strlen(ifr.ifr_name); strcpy(devname[i], ifr.ifr_name); pr_debug("new index %d (%s)\n", i, devname[i]); return i; } static inline void sprint_timestamp(const char timestamp, const struct timeval *tv, struct timeval *const last_tv, char *ts_buffer) { switch (timestamp) { case 'a': /* absolute with timestamp */ sprintf(ts_buffer, "(%010llu.%06llu) ", (unsigned long long)tv->tv_sec, (unsigned long long)tv->tv_usec); break; case 'A': /* absolute with date */ { struct tm tm; char timestring[25]; tm = *localtime(&tv->tv_sec); strftime(timestring, 24, "%Y-%m-%d %H:%M:%S", &tm); sprintf(ts_buffer, "(%s.%06llu) ", timestring, (unsigned long long)tv->tv_usec); } break; case 'd': /* delta */ case 'z': /* starting with zero */ { struct timeval diff; if (last_tv->tv_sec == 0) /* first init */ *last_tv = *tv; diff.tv_sec = tv->tv_sec - last_tv->tv_sec; diff.tv_usec = tv->tv_usec - last_tv->tv_usec; if (diff.tv_usec < 0) diff.tv_sec--, diff.tv_usec += 1000000; if (diff.tv_sec < 0) diff.tv_sec = diff.tv_usec = 0; sprintf(ts_buffer, "(%03llu.%06llu) ", (unsigned long long)diff.tv_sec, (unsigned long long)diff.tv_usec); if (timestamp == 'd') *last_tv = *tv; /* update for delta calculation */ } break; default: /* no timestamp output */ break; } } static inline void print_timestamp(const char timestamp, const struct timeval *tv, struct timeval *const last_tv) { static char buffer[TIMESTAMPSZ]; sprint_timestamp(timestamp, tv, last_tv, buffer); printf("%s", buffer); } int main(int argc, char **argv) { int fd_epoll; struct epoll_event events_pending[MAXSOCK]; struct epoll_event event_setup = { .events = EPOLLIN, /* prepare the common part */ }; unsigned char timestamp = 0; unsigned char logtimestamp = 'a'; unsigned char hwtimestamp = 0; unsigned char down_causes_exit = 1; unsigned char dropmonitor = 0; unsigned char extra_msg_info = 0; unsigned char silent = SILENT_INI; unsigned char silentani = 0; unsigned char color = 0; unsigned char view = 0; unsigned char log = 0; unsigned char logfrmt = 0; int count = 0; int rcvbuf_size = 0; int opt, num_events; int currmax, numfilter; int join_filter; char *ptr, *nptr; struct sockaddr_can addr = { .can_family = AF_CAN, }; char ctrlmsg[CMSG_SPACE(sizeof(struct timeval)) + CMSG_SPACE(3 * sizeof(struct timespec)) + CMSG_SPACE(sizeof(__u32))]; struct iovec iov; struct msghdr msg; struct cmsghdr *cmsg; struct can_filter *rfilter; can_err_mask_t err_mask; struct canfd_frame frame; int nbytes, i, maxdlen; struct ifreq ifr; struct timeval tv, last_tv; int timeout_ms = -1; /* default to no timeout */ FILE *logfile = NULL; char fname[83]; /* suggested by -Wformat-overflow= */ const char *logname = NULL; signal(SIGTERM, sigterm); signal(SIGHUP, sigterm); signal(SIGINT, sigterm); last_tv.tv_sec = 0; last_tv.tv_usec = 0; progname = basename(argv[0]); while ((opt = getopt(argc, argv, "t:HciaSs:lf:Ln:r:Dde8xT:h?")) != -1) { switch (opt) { case 't': timestamp = optarg[0]; logtimestamp = optarg[0]; if ((timestamp != 'a') && (timestamp != 'A') && (timestamp != 'd') && (timestamp != 'z')) { fprintf(stderr, "%s: unknown timestamp mode '%c' - ignored\n", progname, optarg[0]); timestamp = 0; } if ((logtimestamp != 'a') && (logtimestamp != 'z')) { logtimestamp = 'a'; } break; case 'H': hwtimestamp = 1; break; case 'c': color++; break; case 'i': view |= CANLIB_VIEW_BINARY; break; case 'a': view |= CANLIB_VIEW_ASCII; break; case 'S': view |= CANLIB_VIEW_SWAP; break; case 'e': view |= CANLIB_VIEW_ERROR; break; case '8': view |= CANLIB_VIEW_LEN8_DLC; break; case 's': silent = atoi(optarg); if (silent > SILENT_ON) { print_usage(); exit(1); } break; case 'l': log = 1; break; case 'D': down_causes_exit = 0; break; case 'd': dropmonitor = 1; break; case 'x': extra_msg_info = 1; break; case 'L': logfrmt = 1; break; case 'f': logname = optarg; log = 1; break; case 'n': count = atoi(optarg); if (count < 1) { print_usage(); exit(1); } break; case 'r': rcvbuf_size = atoi(optarg); if (rcvbuf_size < 1) { print_usage(); exit(1); } break; case 'T': errno = 0; timeout_ms = strtol(optarg, NULL, 0); if (errno != 0) { print_usage(); exit(1); } break; default: print_usage(); exit(1); break; } } if (optind == argc) { print_usage(); exit(0); } if (logfrmt && view) { fprintf(stderr, "Log file format selected: Please disable ASCII/BINARY/SWAP/RAWDLC options!\n"); exit(0); } /* "-f -" is equal to "-L" (print logfile format on stdout) */ if (log && logname && strcmp("-", logname) == 0) { log = 0; /* no logging into a file */ logfrmt = 1; /* print logformat output to stdout */ } if (silent == SILENT_INI) { if (log) { fprintf(stderr, "Disabled standard output while logging.\n"); silent = SILENT_ON; /* disable output on stdout */ } else silent = SILENT_OFF; /* default output */ } currmax = argc - optind; /* find real number of CAN devices */ if (currmax > MAXSOCK) { fprintf(stderr, "More than %d CAN devices given on commandline!\n", MAXSOCK); return 1; } fd_epoll = epoll_create(1); if (fd_epoll < 0) { perror("epoll_create"); return 1; } for (i = 0; i < currmax; i++) { struct if_info* obj = &sock_info[i]; ptr = argv[optind+i]; nptr = strchr(ptr, ','); pr_debug("open %d '%s'.\n", i, ptr); obj->s = socket(PF_CAN, SOCK_RAW, CAN_RAW); if (obj->s < 0) { perror("socket"); return 1; } event_setup.data.ptr = obj; /* remember the instance as private data */ if (epoll_ctl(fd_epoll, EPOLL_CTL_ADD, obj->s, &event_setup)) { perror("failed to add socket to epoll"); return 1; } obj->cmdlinename = ptr; /* save pointer to cmdline name of this socket */ if (nptr) nbytes = nptr - ptr; /* interface name is up the first ',' */ else nbytes = strlen(ptr); /* no ',' found => no filter definitions */ if (nbytes >= IFNAMSIZ) { fprintf(stderr, "name of CAN device '%s' is too long!\n", ptr); return 1; } if (nbytes > max_devname_len) max_devname_len = nbytes; /* for nice printing */ memset(&ifr.ifr_name, 0, sizeof(ifr.ifr_name)); strncpy(ifr.ifr_name, ptr, nbytes); pr_debug("using interface name '%s'.\n", ifr.ifr_name); if (strcmp(ANYDEV, ifr.ifr_name) != 0) { if (ioctl(obj->s, SIOCGIFINDEX, &ifr) < 0) { perror("SIOCGIFINDEX"); exit(1); } addr.can_ifindex = ifr.ifr_ifindex; } else addr.can_ifindex = 0; /* any can interface */ if (nptr) { /* found a ',' after the interface name => check for filters */ /* determine number of filters to alloc the filter space */ numfilter = 0; ptr = nptr; while (ptr) { numfilter++; ptr++; /* hop behind the ',' */ ptr = strchr(ptr, ','); /* exit condition */ } rfilter = malloc(sizeof(struct can_filter) * numfilter); if (!rfilter) { fprintf(stderr, "Failed to create filter space!\n"); return 1; } numfilter = 0; err_mask = 0; join_filter = 0; while (nptr) { ptr = nptr + 1; /* hop behind the ',' */ nptr = strchr(ptr, ','); /* update exit condition */ if (sscanf(ptr, "%x:%x", &rfilter[numfilter].can_id, &rfilter[numfilter].can_mask) == 2) { rfilter[numfilter].can_mask &= ~CAN_ERR_FLAG; if (*(ptr + 8) == ':') rfilter[numfilter].can_id |= CAN_EFF_FLAG; numfilter++; } else if (sscanf(ptr, "%x~%x", &rfilter[numfilter].can_id, &rfilter[numfilter].can_mask) == 2) { rfilter[numfilter].can_id |= CAN_INV_FILTER; rfilter[numfilter].can_mask &= ~CAN_ERR_FLAG; if (*(ptr + 8) == '~') rfilter[numfilter].can_id |= CAN_EFF_FLAG; numfilter++; } else if (*ptr == 'j' || *ptr == 'J') { join_filter = 1; } else if (sscanf(ptr, "#%x", &err_mask) != 1) { fprintf(stderr, "Error in filter option parsing: '%s'\n", ptr); return 1; } } if (err_mask) setsockopt(obj->s, SOL_CAN_RAW, CAN_RAW_ERR_FILTER, &err_mask, sizeof(err_mask)); if (join_filter && setsockopt(obj->s, SOL_CAN_RAW, CAN_RAW_JOIN_FILTERS, &join_filter, sizeof(join_filter)) < 0) { perror("setsockopt CAN_RAW_JOIN_FILTERS not supported by your Linux Kernel"); return 1; } if (numfilter) setsockopt(obj->s, SOL_CAN_RAW, CAN_RAW_FILTER, rfilter, numfilter * sizeof(struct can_filter)); free(rfilter); } /* if (nptr) */ /* try to switch the socket into CAN FD mode */ setsockopt(obj->s, SOL_CAN_RAW, CAN_RAW_FD_FRAMES, &canfd_on, sizeof(canfd_on)); if (rcvbuf_size) { int curr_rcvbuf_size; socklen_t curr_rcvbuf_size_len = sizeof(curr_rcvbuf_size); /* try SO_RCVBUFFORCE first, if we run with CAP_NET_ADMIN */ if (setsockopt(obj->s, SOL_SOCKET, SO_RCVBUFFORCE, &rcvbuf_size, sizeof(rcvbuf_size)) < 0) { pr_debug("SO_RCVBUFFORCE failed so try SO_RCVBUF ...\n"); if (setsockopt(obj->s, SOL_SOCKET, SO_RCVBUF, &rcvbuf_size, sizeof(rcvbuf_size)) < 0) { perror("setsockopt SO_RCVBUF"); return 1; } if (getsockopt(obj->s, SOL_SOCKET, SO_RCVBUF, &curr_rcvbuf_size, &curr_rcvbuf_size_len) < 0) { perror("getsockopt SO_RCVBUF"); return 1; } /* Only print a warning the first time we detect the adjustment */ /* n.b.: The wanted size is doubled in Linux in net/sore/sock.c */ if (!i && curr_rcvbuf_size < rcvbuf_size * 2) fprintf(stderr, "The socket receive buffer size was " "adjusted due to /proc/sys/net/core/rmem_max.\n"); } } if (timestamp || log || logfrmt) { if (hwtimestamp) { const int timestamping_flags = (SOF_TIMESTAMPING_SOFTWARE | SOF_TIMESTAMPING_RX_SOFTWARE | SOF_TIMESTAMPING_RAW_HARDWARE); if (setsockopt(obj->s, SOL_SOCKET, SO_TIMESTAMPING, ×tamping_flags, sizeof(timestamping_flags)) < 0) { perror("setsockopt SO_TIMESTAMPING is not supported by your Linux kernel"); return 1; } } else { const int timestamp_on = 1; if (setsockopt(obj->s, SOL_SOCKET, SO_TIMESTAMP, ×tamp_on, sizeof(timestamp_on)) < 0) { perror("setsockopt SO_TIMESTAMP"); return 1; } } } if (dropmonitor) { const int dropmonitor_on = 1; if (setsockopt(obj->s, SOL_SOCKET, SO_RXQ_OVFL, &dropmonitor_on, sizeof(dropmonitor_on)) < 0) { perror("setsockopt SO_RXQ_OVFL not supported by your Linux Kernel"); return 1; } } if (bind(obj->s, (struct sockaddr *)&addr, sizeof(addr)) < 0) { perror("bind"); return 1; } } if (log) { if (!logname) { time_t currtime; struct tm now; if (time(&currtime) == (time_t)-1) { perror("time"); return 1; } localtime_r(&currtime, &now); snprintf(fname, sizeof(fname), "candump-%04d-%02d-%02d_%02d%02d%02d.log", now.tm_year + 1900, now.tm_mon + 1, now.tm_mday, now.tm_hour, now.tm_min, now.tm_sec); logname = fname; } if (silent != SILENT_ON) fprintf(stderr, "Warning: Console output active while logging!\n"); fprintf(stderr, "Enabling Logfile '%s'\n", logname); logfile = fopen(logname, "w"); if (!logfile) { perror("logfile"); return 1; } } /* these settings are static and can be held out of the hot path */ iov.iov_base = &frame; msg.msg_name = &addr; msg.msg_iov = &iov; msg.msg_iovlen = 1; msg.msg_control = &ctrlmsg; while (running) { num_events = epoll_wait(fd_epoll, events_pending, currmax, timeout_ms); if (num_events == -1) { if (errno != EINTR) running = 0; continue; } /* handle timeout */ if (!num_events && timeout_ms >= 0) { running = 0; continue; } for (i = 0; i < num_events; i++) { /* check waiting CAN RAW sockets */ struct if_info* obj = events_pending[i].data.ptr; int idx; char *extra_info = ""; /* these settings may be modified by recvmsg() */ iov.iov_len = sizeof(frame); msg.msg_namelen = sizeof(addr); msg.msg_controllen = sizeof(ctrlmsg); msg.msg_flags = 0; nbytes = recvmsg(obj->s, &msg, 0); idx = idx2dindex(addr.can_ifindex, obj->s); if (nbytes < 0) { if ((errno == ENETDOWN) && !down_causes_exit) { fprintf(stderr, "%s: interface down\n", devname[idx]); continue; } perror("read"); return 1; } if ((size_t)nbytes == CAN_MTU) maxdlen = CAN_MAX_DLEN; else if ((size_t)nbytes == CANFD_MTU) maxdlen = CANFD_MAX_DLEN; else { fprintf(stderr, "read: incomplete CAN frame\n"); return 1; } if (count && (--count == 0)) running = 0; for (cmsg = CMSG_FIRSTHDR(&msg); cmsg && (cmsg->cmsg_level == SOL_SOCKET); cmsg = CMSG_NXTHDR(&msg,cmsg)) { if (cmsg->cmsg_type == SO_TIMESTAMP) { memcpy(&tv, CMSG_DATA(cmsg), sizeof(tv)); } else if (cmsg->cmsg_type == SO_TIMESTAMPING) { struct timespec *stamp = (struct timespec *)CMSG_DATA(cmsg); /* * stamp[0] is the software timestamp * stamp[1] is deprecated * stamp[2] is the raw hardware timestamp * See chapter 2.1.2 Receive timestamps in * linux/Documentation/networking/timestamping.txt */ tv.tv_sec = stamp[2].tv_sec; tv.tv_usec = stamp[2].tv_nsec / 1000; } else if (cmsg->cmsg_type == SO_RXQ_OVFL) { memcpy(&obj->dropcnt, CMSG_DATA(cmsg), sizeof(__u32)); } } /* check for (unlikely) dropped frames on this specific socket */ if (obj->dropcnt != obj->last_dropcnt) { __u32 frames = obj->dropcnt - obj->last_dropcnt; if (silent != SILENT_ON) printf("DROPCOUNT: dropped %u CAN frame%s on '%s' socket (total drops %u)\n", frames, (frames > 1)?"s":"", devname[idx], obj->dropcnt); if (log) fprintf(logfile, "DROPCOUNT: dropped %u CAN frame%s on '%s' socket (total drops %u)\n", frames, (frames > 1)?"s":"", devname[idx], obj->dropcnt); obj->last_dropcnt = obj->dropcnt; } /* once we detected a EFF frame indent SFF frames accordingly */ if (frame.can_id & CAN_EFF_FLAG) view |= CANLIB_VIEW_INDENT_SFF; if (extra_msg_info) { if (msg.msg_flags & MSG_DONTROUTE) extra_info = " T"; else extra_info = " R"; } if (log) { char buf[CL_CFSZ]; /* max length */ char ts_buf[TIMESTAMPSZ]; sprint_timestamp(logtimestamp, &tv, &last_tv, ts_buf); /* log CAN frame with absolute timestamp & device */ sprint_canframe(buf, &frame, 0, maxdlen); fprintf(logfile, "%s%*s %s%s\n", ts_buf, max_devname_len, devname[idx], buf, extra_info); } if ((logfrmt) && (silent == SILENT_OFF)) { char buf[CL_CFSZ]; /* max length */ /* print CAN frame in log file style to stdout */ sprint_canframe(buf, &frame, 0, maxdlen); print_timestamp(logtimestamp, &tv, &last_tv); printf("%*s %s%s\n", max_devname_len, devname[idx], buf, extra_info); goto out_fflush; /* no other output to stdout */ } if (silent != SILENT_OFF) { if (silent == SILENT_ANI) { printf("%c\b", anichar[silentani %= MAXANI]); silentani++; } goto out_fflush; /* no other output to stdout */ } printf(" %s", (color > 2) ? col_on[idx % MAXCOL] : ""); print_timestamp(timestamp, &tv, &last_tv); printf(" %s", (color && (color < 3)) ? col_on[idx % MAXCOL] : ""); printf("%*s", max_devname_len, devname[idx]); if (extra_msg_info) { if (msg.msg_flags & MSG_DONTROUTE) printf (" TX %s", extra_m_info[frame.flags & 3]); else printf (" RX %s", extra_m_info[frame.flags & 3]); } printf("%s ", (color == 1) ? col_off : ""); fprint_long_canframe(stdout, &frame, NULL, view, maxdlen); printf("%s", (color > 1) ? col_off : ""); printf("\n"); out_fflush: fflush(stdout); } } for (i = 0; i < currmax; i++) close(sock_info[i].s); close(fd_epoll); if (log) fclose(logfile); if (signal_num) return 128 + signal_num; return 0; }