/* $OpenBSD: npppctl.c,v 1.10 2021/11/15 15:14:24 millert Exp $ */ /* * Copyright (c) 2012 Internet Initiative Japan Inc. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "parser.h" #include "npppd_ctl.h" #define MINIMUM(a, b) (((a) < (b)) ? (a) : (b)) #ifndef nitems #define nitems(_x) (sizeof(_x) / sizeof(_x[0])) #endif #define NMAX_DISCONNECT 2048 static void usage (void); static void show_clear_session (struct parse_result *, FILE *); static void monitor_session (struct parse_result *, FILE *); static void clear_session (u_int[], int, int, FILE *); static void fprint_who_brief (int, struct npppd_who *, FILE *); static void fprint_who_packets (int, struct npppd_who *, FILE *); static void fprint_who_all (int, struct npppd_who *, FILE *); static const char *peerstr (struct sockaddr *, char *, int); static const char *humanize_duration (uint32_t, char *, int); static const char *humanize_bytes (double, char *, int); static bool filter_match(struct parse_result *, struct npppd_who *); static int imsg_wait_command_completion (void); static int nflag = 0; static struct imsgbuf ctl_ibuf; static struct imsg ctl_imsg; static void usage(void) { extern char *__progname; fprintf(stderr, "usage: %s [-n] [-s socket] command [arg ...]\n", __progname); } int main(int argc, char *argv[]) { int ch, ctlsock = -1; struct parse_result *result; struct sockaddr_un sun; const char *npppd_ctlpath = NPPPD_SOCKET; while ((ch = getopt(argc, argv, "ns:")) != -1) switch (ch) { case 'n': nflag = 1; break; case 's': npppd_ctlpath = optarg; break; default: usage(); exit(EXIT_FAILURE); } argc -= optind; argv += optind; if ((result = parse(argc, argv)) == NULL) exit(EXIT_FAILURE); if ((ctlsock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) err(EXIT_FAILURE, "socket"); memset(&sun, 0, sizeof(sun)); sun.sun_family = AF_UNIX; strlcpy(sun.sun_path, npppd_ctlpath, sizeof(sun.sun_path)); if (connect(ctlsock, (struct sockaddr *)&sun, sizeof(sun)) == -1) err(EXIT_FAILURE, "connect"); imsg_init(&ctl_ibuf, ctlsock); switch (result->action) { case SESSION_BRIEF: case SESSION_PKTS: case SESSION_ALL: show_clear_session(result, stdout); break; case CLEAR_SESSION: if (!result->has_ppp_id) show_clear_session(result, stdout); else { u_int ids[1]; ids[0] = result->ppp_id; clear_session(ids, 1, 1, stdout); } break; case MONITOR_SESSION: monitor_session(result, stdout); break; case NONE: break; } exit(EXIT_SUCCESS); } static void show_clear_session(struct parse_result *result, FILE *out) { int i, n, ppp_id_idx; struct npppd_who_list *res; u_int ppp_id[NMAX_DISCONNECT]; if (imsg_compose(&ctl_ibuf, IMSG_CTL_WHO, 0, 0, -1, NULL, 0) == -1) err(EXIT_FAILURE, "failed to componse a message\n"); if (imsg_wait_command_completion() < 0) errx(EXIT_FAILURE, "failed to get response"); if (ctl_imsg.hdr.type != IMSG_CTL_OK) errx(EXIT_FAILURE, "command was fail"); n = ppp_id_idx = 0; while (imsg_wait_command_completion() == IMSG_PPP_START) { res = (struct npppd_who_list *)ctl_imsg.data; if (ctl_imsg.hdr.len - IMSG_HEADER_SIZE < offsetof(struct npppd_who_list, entry[res->entry_count])) { errx(1, "response size %d is too small for " "the entry count %d", (int)(ctl_imsg.hdr.len - IMSG_HEADER_SIZE), res->entry_count); } for (i = 0; i < res->entry_count; i++, n++) { switch (result->action) { case SESSION_BRIEF: fprint_who_brief(n, &res->entry[i], out); break; case SESSION_PKTS: fprint_who_packets(n, &res->entry[i], out); break; case SESSION_ALL: if (filter_match(result, &res->entry[i])) fprint_who_all(n, &res->entry[i], out); break; case CLEAR_SESSION: if (filter_match(result, &res->entry[i])) { if (ppp_id_idx < nitems(ppp_id)) ppp_id[ppp_id_idx] = res->entry[i].ppp_id; ppp_id_idx++; } break; default: warnx("must not reached here"); abort(); } } if (!res->more_data) break; } if (result->action == CLEAR_SESSION) { if (ppp_id_idx > nitems(ppp_id)) warnx( "Disconnection for %d sessions has been requested, " "but cannot disconnect only %d sessions because of " "the implementation limit.", ppp_id_idx, (int)nitems(ppp_id)); clear_session(ppp_id, MINIMUM(ppp_id_idx, nitems(ppp_id)), ppp_id_idx, out); } } const char *bar = "------------------------------------------------------------------------\n"; static void monitor_session(struct parse_result *result, FILE *out) { int i, n; struct npppd_who_list *res; if (imsg_compose(&ctl_ibuf, IMSG_CTL_MONITOR, 0, 0, -1, NULL, 0) == -1) err(EXIT_FAILURE, "failed to compose a message"); if (imsg_wait_command_completion() < 0) errx(EXIT_FAILURE, "failed to get response"); if (ctl_imsg.hdr.type != IMSG_CTL_OK) errx(EXIT_FAILURE, "command was fail"); do { if (imsg_wait_command_completion() < 0) break; n = 0; if (ctl_imsg.hdr.type == IMSG_PPP_START || ctl_imsg.hdr.type == IMSG_PPP_STOP) { res = (struct npppd_who_list *)ctl_imsg.data; for (i = 0; i < res->entry_count; i++) { if (!filter_match(result, &res->entry[i])) continue; if (n == 0) fprintf(out, "PPP %s\n%s", (ctl_imsg.hdr.type == IMSG_PPP_START) ? "Started" : "Stopped", bar); fprint_who_all(n++, &res->entry[i], out); } if (n > 0) fputs(bar, out); } else { warnx("received unknown message type = %d", ctl_imsg.hdr.type); break; } } while (true); return; } static void fprint_who_brief(int i, struct npppd_who *w, FILE *out) { char buf[BUFSIZ]; if (i == 0) fputs( "Ppp Id Assigned IPv4 Username Proto Tunnel From\n" "---------- --------------- -------------------- ----- ------------------------" "-\n", out); fprintf(out, "%10u %-15s %-20s %-5s %s\n", w->ppp_id, inet_ntoa(w->framed_ip_address), w->username, w->tunnel_proto, peerstr((struct sockaddr *)&w->tunnel_peer, buf, sizeof(buf))); } static void fprint_who_packets(int i, struct npppd_who *w, FILE *out) { if (i == 0) fputs( "Ppd Id Username In(Kbytes/pkts/errs) Out(Kbytes/pkts/errs)" "\n" "---------- -------------------- ----------------------- ----------------------" "-\n", out); fprintf(out, "%10u %-20s %9.1f %7u %5u %9.1f %7u %5u\n", w->ppp_id, w->username, (double)w->ibytes/1024, w->ipackets, w->ierrors, (double)w->obytes/1024, w->opackets, w->oerrors); } static void fprint_who_all(int i, struct npppd_who *w, FILE *out) { struct tm tm; char ibytes_buf[48], obytes_buf[48], peer_buf[48], time_buf[48]; char dur_buf[48]; localtime_r(&w->time, &tm); strftime(time_buf, sizeof(time_buf), "%Y/%m/%d %T", &tm); if (i != 0) fputs("\n", out); fprintf(out, "Ppp Id = %u\n" " Ppp Id : %u\n" " Username : %s\n" " Realm Name : %s\n" " Concentrated Interface : %s\n" " Assigned IPv4 Address : %s\n" " MRU : %u\n" " Tunnel Protocol : %s\n" " Tunnel From : %s\n" " Start Time : %s\n" " Elapsed Time : %lu sec %s\n" " Input Bytes : %llu%s\n" " Input Packets : %lu\n" " Input Errors : %lu (%.1f%%)\n" " Output Bytes : %llu%s\n" " Output Packets : %lu\n" " Output Errors : %lu (%.1f%%)\n", w->ppp_id, w->ppp_id, w->username, w->rlmname, w->ifname, inet_ntoa(w->framed_ip_address), (u_int)w->mru, w->tunnel_proto, peerstr((struct sockaddr *)&w->tunnel_peer, peer_buf, sizeof(peer_buf)), time_buf, (unsigned long)w->duration_sec, humanize_duration(w->duration_sec, dur_buf, sizeof(dur_buf)), (unsigned long long)w->ibytes, humanize_bytes((double)w->ibytes, ibytes_buf, sizeof(ibytes_buf)), (unsigned long)w->ipackets, (unsigned long)w->ierrors, ((w->ipackets + w->ierrors) <= 0) ? 0.0 : (100.0 * w->ierrors) / (w->ierrors + w->ipackets), (unsigned long long)w->obytes, humanize_bytes((double)w->obytes, obytes_buf, sizeof(obytes_buf)), (unsigned long)w->opackets, (unsigned long)w->oerrors, ((w->opackets + w->oerrors) <= 0) ? 0.0 : (100.0 * w->oerrors) / (w->oerrors + w->opackets)); } /*********************************************************************** * clear session ***********************************************************************/ static void clear_session(u_int ppp_id[], int ppp_id_count, int total, FILE *out) { int succ, fail, i, n, nmax; struct iovec iov[2]; struct npppd_disconnect_request req; struct npppd_disconnect_response *res; succ = fail = 0; if (ppp_id_count > 0) { nmax = (MAX_IMSGSIZE - IMSG_HEADER_SIZE - offsetof(struct npppd_disconnect_request, ppp_id[0])) / sizeof(u_int); for (i = 0; i < ppp_id_count; i += n) { n = MINIMUM(nmax, ppp_id_count - i); req.count = n; iov[0].iov_base = &req; iov[0].iov_len = offsetof( struct npppd_disconnect_request, ppp_id[0]); iov[1].iov_base = &ppp_id[i]; iov[1].iov_len = sizeof(u_int) * n; if (imsg_composev(&ctl_ibuf, IMSG_CTL_DISCONNECT, 0, 0, -1, iov, 2) == -1) err(EXIT_FAILURE, "Failed to compose a message"); if (imsg_wait_command_completion() < 0) errx(EXIT_FAILURE, "failed to get response"); if (ctl_imsg.hdr.type != IMSG_CTL_OK) errx(EXIT_FAILURE, "Command was fail: msg type = %d", ctl_imsg.hdr.type); if (ctl_imsg.hdr.len - IMSG_HEADER_SIZE < sizeof(struct npppd_disconnect_response)) err(EXIT_FAILURE, "response is corrupted"); res = (struct npppd_disconnect_response *)ctl_imsg.data; succ += res->count; } fail = total - succ; } if (succ > 0) fprintf(out, "Successfully disconnected %d session%s.\n", succ, (succ > 1)? "s" : ""); if (fail > 0) fprintf(out, "Failed to disconnect %d session%s.\n", fail, (fail > 1)? "s" : ""); if (succ == 0 && fail == 0) fprintf(out, "No session to disconnect.\n"); } /*********************************************************************** * common functions ***********************************************************************/ static bool filter_match(struct parse_result *result, struct npppd_who *who) { if (result->has_ppp_id && result->ppp_id != who->ppp_id) return (false); switch (result->address.ss_family) { case AF_INET: if (((struct sockaddr_in *)&result->address)->sin_addr. s_addr != who->framed_ip_address.s_addr) return (false); break; case AF_INET6: /* npppd doesn't support IPv6 yet */ return (false); } if (result->interface != NULL && strcmp(result->interface, who->ifname) != 0) return (false); if (result->protocol != PROTO_UNSPEC && result->protocol != parse_protocol(who->tunnel_proto) ) return (false); if (result->realm != NULL && strcmp(result->realm, who->rlmname) != 0) return (false); if (result->username != NULL && strcmp(result->username, who->username) != 0) return (false); return (true); } static const char * peerstr(struct sockaddr *sa, char *buf, int lbuf) { int niflags, hasserv; char hoststr[NI_MAXHOST], servstr[NI_MAXSERV]; niflags = hasserv = 0; if (nflag) niflags |= NI_NUMERICHOST; if (sa->sa_family == AF_INET || sa->sa_family ==AF_INET6) { hasserv = 1; niflags |= NI_NUMERICSERV; } if (sa->sa_family == AF_LINK) snprintf(hoststr, sizeof(hoststr), "%02x:%02x:%02x:%02x:%02x:%02x", LLADDR((struct sockaddr_dl *)sa)[0] & 0xff, LLADDR((struct sockaddr_dl *)sa)[1] & 0xff, LLADDR((struct sockaddr_dl *)sa)[2] & 0xff, LLADDR((struct sockaddr_dl *)sa)[3] & 0xff, LLADDR((struct sockaddr_dl *)sa)[4] & 0xff, LLADDR((struct sockaddr_dl *)sa)[5] & 0xff); else getnameinfo(sa, sa->sa_len, hoststr, sizeof(hoststr), servstr, sizeof(servstr), niflags); strlcpy(buf, hoststr, lbuf); if (hasserv) { strlcat(buf, ":", lbuf); strlcat(buf, servstr, lbuf); } return (buf); } static const char * humanize_duration(uint32_t sec, char *buf, int lbuf) { char fbuf[128]; int hour, min; hour = sec / (60 * 60); min = sec / 60; min %= 60; if (lbuf <= 0) return (buf); buf[0] = '\0'; if (hour || min) { strlcat(buf, "(", lbuf); if (hour) { snprintf(fbuf, sizeof(fbuf), "%d hour%s", hour, (hour > 1)? "s" : ""); strlcat(buf, fbuf, lbuf); } if (hour && min) strlcat(buf, " and ", lbuf); if (min) { snprintf(fbuf, sizeof(fbuf), "%d minute%s", min, (min > 1)? "s" : ""); strlcat(buf, fbuf, lbuf); } strlcat(buf, ")", lbuf); } return (buf); } static const char * humanize_bytes(double val, char *buf, int lbuf) { if (lbuf <= 0) return (buf); if (val >= 1000 * 1024 * 1024) snprintf(buf, lbuf, " (%.1f GB)", (double)val / (1024 * 1024 * 1024)); else if (val >= 1000 * 1024) snprintf(buf, lbuf, " (%.1f MB)", (double)val / (1024 * 1024)); else if (val >= 1000) snprintf(buf, lbuf, " (%.1f KB)", (double)val / 1024); else buf[0] = '\0'; return (buf); } static int imsg_wait_command_completion(void) { int n; while (ctl_ibuf.w.queued) if (msgbuf_write(&ctl_ibuf.w) <= 0 && errno != EAGAIN) return (-1); do { if ((n = imsg_get(&ctl_ibuf, &ctl_imsg)) == -1) return (-1); if (n != 0) break; if (((n = imsg_read(&ctl_ibuf)) == -1 && errno != EAGAIN) || n == 0) return (-1); } while (1); return (ctl_imsg.hdr.type); }