Holger Freyther | 3cf00fb | 2009-06-08 10:33:06 +0000 | [diff] [blame] | 1 | /* isdnsync.c |
| 2 | * |
| 3 | * Author Andreas Eversberg <jolly@eversberg.eu> |
| 4 | * |
| 5 | * All rights reserved |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 8 | * it under the terms of the GNU Affero General Public License as published by |
| 9 | * the Free Software Foundation; either version 3 of the License, or |
Holger Freyther | 3cf00fb | 2009-06-08 10:33:06 +0000 | [diff] [blame] | 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 15 | * GNU Affero General Public License for more details. |
Holger Freyther | 3cf00fb | 2009-06-08 10:33:06 +0000 | [diff] [blame] | 16 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * You should have received a copy of the GNU Affero General Public License |
| 18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Holger Freyther | 3cf00fb | 2009-06-08 10:33:06 +0000 | [diff] [blame] | 19 | * |
| 20 | */ |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | #include <unistd.h> |
| 25 | #include <sys/ioctl.h> |
Holger Freyther | 3cf00fb | 2009-06-08 10:33:06 +0000 | [diff] [blame] | 26 | #include <sys/stat.h> |
| 27 | #include <fcntl.h> |
| 28 | #include <errno.h> |
| 29 | #include <sys/socket.h> |
| 30 | #include "mISDNif.h" |
| 31 | #define MISDN_OLD_AF_COMPATIBILITY |
| 32 | #define AF_COMPATIBILITY_FUNC |
| 33 | #include "compat_af_isdn.h" |
| 34 | |
| 35 | int card = 0; |
| 36 | int sock = -1; |
| 37 | |
| 38 | int mISDN_open(void) |
| 39 | { |
| 40 | int fd, ret; |
| 41 | struct mISDN_devinfo devinfo; |
| 42 | struct sockaddr_mISDN l2addr; |
| 43 | |
| 44 | fd = socket(PF_ISDN, SOCK_RAW, ISDN_P_BASE); |
| 45 | if (fd < 0) { |
| 46 | fprintf(stderr, "could not open socket (%s)\n", strerror(errno)); |
| 47 | return fd; |
| 48 | } |
| 49 | devinfo.id = card; |
| 50 | ret = ioctl(fd, IMGETDEVINFO, &devinfo); |
| 51 | if (ret < 0) { |
| 52 | fprintf(stderr,"could not send IOCTL IMGETCOUNT (%s)\n", strerror(errno)); |
| 53 | close(fd); |
| 54 | return ret; |
| 55 | } |
| 56 | close(fd); |
| 57 | if (!(devinfo.Dprotocols & (1 << ISDN_P_TE_S0)) |
| 58 | && !(devinfo.Dprotocols & (1 << ISDN_P_TE_E1))) { |
| 59 | fprintf(stderr,"Interface does not support TE mode (%s)\n", strerror(errno)); |
Holger Freyther | 3cf00fb | 2009-06-08 10:33:06 +0000 | [diff] [blame] | 60 | return ret; |
| 61 | } |
| 62 | fd = socket(PF_ISDN, SOCK_DGRAM, ISDN_P_LAPD_TE); |
| 63 | if (fd < 0) { |
| 64 | fprintf(stderr,"could not open ISDN_P_LAPD_TE socket (%s)\n", strerror(errno)); |
| 65 | return fd; |
| 66 | } |
| 67 | l2addr.family = AF_ISDN; |
| 68 | l2addr.dev = card; |
| 69 | l2addr.channel = 0; |
| 70 | l2addr.sapi = 0; |
| 71 | l2addr.tei = 0; |
| 72 | ret = bind(fd, (struct sockaddr *)&l2addr, sizeof(l2addr)); |
| 73 | if (ret < 0) { |
| 74 | fprintf(stderr,"could not bind socket for card %d (%s)\n", card, strerror(errno)); |
| 75 | close(fd); |
| 76 | return ret; |
| 77 | } |
| 78 | sock = fd; |
| 79 | |
| 80 | return sock; |
| 81 | } |
| 82 | |
| 83 | |
| 84 | void mISDN_handle(void) |
| 85 | { |
| 86 | int ret; |
| 87 | fd_set rfd; |
| 88 | struct timeval tv; |
| 89 | struct sockaddr_mISDN addr; |
| 90 | socklen_t alen; |
| 91 | unsigned char buffer[2048]; |
| 92 | struct mISDNhead *hh = (struct mISDNhead *)buffer; |
| 93 | int l1 = 0, l2 = 0, tei = 0; |
| 94 | |
| 95 | while(1) { |
| 96 | again: |
| 97 | FD_ZERO(&rfd); |
| 98 | FD_SET(sock, &rfd); |
| 99 | tv.tv_sec = 2; |
| 100 | tv.tv_usec = 0; |
| 101 | ret = select(sock+1, &rfd, NULL, NULL, &tv); |
| 102 | if (ret < 0) { |
| 103 | if (errno == EINTR) |
| 104 | continue; |
| 105 | fprintf(stderr, "%s aborted: %s\n", __FUNCTION__, strerror(errno)); |
| 106 | break; |
| 107 | } |
| 108 | if (FD_ISSET(sock, &rfd)) { |
| 109 | alen = sizeof(addr); |
| 110 | ret = recvfrom(sock, buffer, sizeof(buffer), 0, (struct sockaddr *) &addr, &alen); |
| 111 | if (ret < 0) { |
| 112 | fprintf(stderr, "%s read socket error %s\n", __FUNCTION__, strerror(errno)); |
| 113 | } else if (ret < MISDN_HEADER_LEN) { |
| 114 | fprintf(stderr, "%s read socket shor frame\n", __FUNCTION__); |
| 115 | } else { |
| 116 | switch(hh->prim) { |
| 117 | case MPH_ACTIVATE_IND: |
| 118 | case PH_ACTIVATE_IND: |
| 119 | if (!l1) { |
| 120 | printf("PH_ACTIVATE\n"); |
| 121 | printf("*** Sync available from interface :-)\n"); |
| 122 | l1 = 1; |
| 123 | } |
| 124 | goto again; |
| 125 | break; |
| 126 | case MPH_DEACTIVATE_IND: |
| 127 | case PH_DEACTIVATE_IND: |
| 128 | if (l1) { |
| 129 | printf("PH_DEACTIVATE\n"); |
| 130 | printf("*** Lost sync on interface :-(\n"); |
| 131 | l1 = 0; |
| 132 | } |
| 133 | goto again; |
| 134 | break; |
| 135 | case DL_ESTABLISH_IND: |
| 136 | case DL_ESTABLISH_CNF: |
| 137 | printf("DL_ESTABLISH\n"); |
| 138 | l2 = 1; |
| 139 | goto again; |
| 140 | break; |
| 141 | case DL_RELEASE_IND: |
| 142 | case DL_RELEASE_CNF: |
| 143 | printf("DL_RELEASE\n"); |
| 144 | l2 = 0; |
| 145 | goto again; |
| 146 | break; |
| 147 | case DL_INFORMATION_IND: |
| 148 | printf("DL_INFORMATION (tei %d sapi %d)\n", addr.tei, addr.sapi); |
| 149 | tei = 1; |
| 150 | break; |
| 151 | default: |
| 152 | // printf("prim %x\n", hh->prim); |
| 153 | goto again; |
| 154 | } |
| 155 | } |
| 156 | } |
| 157 | if (tei && !l2) { |
| 158 | hh->prim = DL_ESTABLISH_REQ; |
| 159 | printf("-> activating layer 2\n"); |
| 160 | sendto(sock, buffer, MISDN_HEADER_LEN, 0, (struct sockaddr *) &addr, alen); |
| 161 | } |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | int main(int argc, char *argv[]) |
| 166 | { |
| 167 | int ret; |
| 168 | |
| 169 | if (argc <= 1) |
| 170 | { |
| 171 | printf("Usage: %s <card>\n\n", argv[0]); |
| 172 | printf("Opens given card number in TE-mode PTP and tries to keep layer 2 established.\n"); |
| 173 | printf("This keeps layer 1 activated to retrieve a steady sync signal from network.\n"); |
| 174 | return(0); |
| 175 | } |
| 176 | |
| 177 | card = atoi(argv[1]); |
| 178 | |
| 179 | init_af_isdn(); |
| 180 | |
| 181 | if ((ret = mISDN_open() < 0)) |
| 182 | return(ret); |
| 183 | |
| 184 | mISDN_handle(); |
| 185 | |
| 186 | close(sock); |
| 187 | |
| 188 | return 0; |
| 189 | } |