Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 1 | #include "internal.h" |
| 2 | |
| 3 | #include <stdio.h> |
| 4 | #include <unistd.h> |
| 5 | #include <stdlib.h> |
| 6 | #include <errno.h> |
| 7 | #include <string.h> |
| 8 | #include <time.h> |
| 9 | #include <sys/fcntl.h> |
| 10 | #include <sys/socket.h> |
| 11 | #include <sys/ioctl.h> |
| 12 | #include <arpa/inet.h> |
| 13 | |
| 14 | #include <osmocom/core/select.h> |
| 15 | #include <osmocom/gsm/tlv.h> |
| 16 | #include <osmocom/core/msgb.h> |
| 17 | #include <osmocom/core/logging.h> |
Harald Welte | 71d87b2 | 2011-07-18 14:49:56 +0200 | [diff] [blame] | 18 | #include <osmocom/core/talloc.h> |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 19 | #include <osmocom/abis/e1_input.h> |
| 20 | #include <osmocom/abis/ipaccess.h> |
| 21 | #include <osmocom/core/socket.h> |
Pablo Neira Ayuso | ef13269 | 2013-07-08 01:17:27 +0200 | [diff] [blame] | 22 | #include <osmocom/core/backtrace.h> |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 23 | |
| 24 | #include <osmocom/abis/ipa.h> |
| 25 | |
| 26 | #define IPA_ALLOC_SIZE 1200 |
| 27 | |
Pablo Neira Ayuso | 88136fc | 2011-07-08 16:21:55 +0200 | [diff] [blame] | 28 | struct msgb *ipa_msg_alloc(int headroom) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 29 | { |
Pablo Neira Ayuso | 88136fc | 2011-07-08 16:21:55 +0200 | [diff] [blame] | 30 | struct msgb *nmsg; |
| 31 | |
| 32 | headroom += sizeof(struct ipaccess_head); |
| 33 | |
| 34 | nmsg = msgb_alloc_headroom(1200 + headroom, headroom, "Abis/IP"); |
| 35 | if (!nmsg) |
| 36 | return NULL; |
| 37 | return nmsg; |
| 38 | } |
| 39 | |
| 40 | void ipa_msg_push_header(struct msgb *msg, uint8_t proto) |
| 41 | { |
| 42 | struct ipaccess_head *hh; |
| 43 | |
| 44 | msg->l2h = msg->data; |
| 45 | hh = (struct ipaccess_head *) msgb_push(msg, sizeof(*hh)); |
| 46 | hh->proto = proto; |
| 47 | hh->len = htons(msgb_l2len(msg)); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 48 | } |
| 49 | |
| 50 | int ipa_msg_recv(int fd, struct msgb **rmsg) |
| 51 | { |
| 52 | struct msgb *msg; |
| 53 | struct ipaccess_head *hh; |
| 54 | int len, ret; |
| 55 | |
Pablo Neira Ayuso | 88136fc | 2011-07-08 16:21:55 +0200 | [diff] [blame] | 56 | msg = ipa_msg_alloc(0); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 57 | if (msg == NULL) |
| 58 | return -ENOMEM; |
| 59 | |
| 60 | /* first read our 3-byte header */ |
| 61 | hh = (struct ipaccess_head *) msg->data; |
| 62 | ret = recv(fd, msg->data, sizeof(*hh), 0); |
| 63 | if (ret <= 0) { |
| 64 | msgb_free(msg); |
| 65 | return ret; |
| 66 | } else if (ret != sizeof(*hh)) { |
Pablo Neira Ayuso | 32c883a | 2011-09-09 01:01:36 +0200 | [diff] [blame] | 67 | LOGP(DLINP, LOGL_ERROR, "too small message received\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 68 | msgb_free(msg); |
| 69 | return -EIO; |
| 70 | } |
| 71 | msgb_put(msg, ret); |
| 72 | |
| 73 | /* then read the length as specified in header */ |
| 74 | msg->l2h = msg->data + sizeof(*hh); |
| 75 | len = ntohs(hh->len); |
| 76 | |
| 77 | if (len < 0 || IPA_ALLOC_SIZE < len + sizeof(*hh)) { |
Pablo Neira Ayuso | 32c883a | 2011-09-09 01:01:36 +0200 | [diff] [blame] | 78 | LOGP(DLINP, LOGL_ERROR, "bad message length of %d bytes, " |
| 79 | "received %d bytes\n", len, ret); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 80 | msgb_free(msg); |
| 81 | return -EIO; |
| 82 | } |
| 83 | |
| 84 | ret = recv(fd, msg->l2h, len, 0); |
| 85 | if (ret <= 0) { |
| 86 | msgb_free(msg); |
| 87 | return ret; |
| 88 | } else if (ret < len) { |
Pablo Neira Ayuso | 32c883a | 2011-09-09 01:01:36 +0200 | [diff] [blame] | 89 | LOGP(DLINP, LOGL_ERROR, "trunked message received\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 90 | msgb_free(msg); |
| 91 | return -EIO; |
| 92 | } |
| 93 | msgb_put(msg, ret); |
| 94 | *rmsg = msg; |
| 95 | return ret; |
| 96 | } |
| 97 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 98 | void ipa_client_conn_close(struct ipa_client_conn *link); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 99 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 100 | static void ipa_client_retry(struct ipa_client_conn *link) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 101 | { |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 102 | LOGP(DLINP, LOGL_NOTICE, "connection closed\n"); |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 103 | ipa_client_conn_close(link); |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 104 | LOGP(DLINP, LOGL_NOTICE, "retrying in 5 seconds...\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 105 | osmo_timer_schedule(&link->timer, 5, 0); |
Pablo Neira Ayuso | c07a8e7 | 2011-06-21 19:50:04 +0200 | [diff] [blame] | 106 | link->state = IPA_CLIENT_LINK_STATE_CONNECTING; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 107 | } |
| 108 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 109 | void ipa_client_conn_close(struct ipa_client_conn *link) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 110 | { |
Harald Welte | e68055b | 2013-06-30 14:21:54 +0200 | [diff] [blame] | 111 | /* be safe against multiple calls */ |
| 112 | if (link->ofd->fd != -1) { |
| 113 | osmo_fd_unregister(link->ofd); |
| 114 | close(link->ofd->fd); |
| 115 | link->ofd->fd = -1; |
| 116 | } |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 117 | } |
| 118 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 119 | static void ipa_client_read(struct ipa_client_conn *link) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 120 | { |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 121 | struct osmo_fd *ofd = link->ofd; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 122 | struct msgb *msg; |
| 123 | int ret; |
| 124 | |
Pablo Neira Ayuso | 218bb8f | 2011-09-09 01:04:46 +0200 | [diff] [blame] | 125 | LOGP(DLINP, LOGL_DEBUG, "message received\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 126 | |
| 127 | ret = ipa_msg_recv(ofd->fd, &msg); |
| 128 | if (ret < 0) { |
| 129 | if (errno == EPIPE || errno == ECONNRESET) { |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 130 | LOGP(DLINP, LOGL_ERROR, "lost connection with server\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 131 | } |
| 132 | ipa_client_retry(link); |
| 133 | return; |
| 134 | } else if (ret == 0) { |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 135 | LOGP(DLINP, LOGL_ERROR, "connection closed with server\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 136 | ipa_client_retry(link); |
| 137 | return; |
| 138 | } |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 139 | if (link->read_cb) |
| 140 | link->read_cb(link, msg); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 141 | } |
| 142 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 143 | static void ipa_client_write(struct ipa_client_conn *link) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 144 | { |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 145 | if (link->write_cb) |
| 146 | link->write_cb(link); |
| 147 | } |
| 148 | |
Pablo Neira Ayuso | 8ad30c9 | 2011-09-08 13:29:06 +0200 | [diff] [blame] | 149 | static int ipa_client_write_default_cb(struct ipa_client_conn *link) |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 150 | { |
| 151 | struct osmo_fd *ofd = link->ofd; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 152 | struct msgb *msg; |
| 153 | struct llist_head *lh; |
| 154 | int ret; |
| 155 | |
Pablo Neira Ayuso | 218bb8f | 2011-09-09 01:04:46 +0200 | [diff] [blame] | 156 | LOGP(DLINP, LOGL_DEBUG, "sending data\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 157 | |
| 158 | if (llist_empty(&link->tx_queue)) { |
| 159 | ofd->when &= ~BSC_FD_WRITE; |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 160 | return 0; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 161 | } |
| 162 | lh = link->tx_queue.next; |
| 163 | llist_del(lh); |
| 164 | msg = llist_entry(lh, struct msgb, list); |
| 165 | |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 166 | ret = send(link->ofd->fd, msg->data, msg->len, 0); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 167 | if (ret < 0) { |
| 168 | if (errno == EPIPE || errno == ENOTCONN) { |
| 169 | ipa_client_retry(link); |
| 170 | } |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 171 | LOGP(DLINP, LOGL_ERROR, "error to send\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 172 | } |
| 173 | msgb_free(msg); |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 174 | return 0; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 175 | } |
| 176 | |
Harald Welte | 7b6fc2e | 2011-08-19 21:58:48 +0200 | [diff] [blame] | 177 | static int ipa_client_fd_cb(struct osmo_fd *ofd, unsigned int what) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 178 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 179 | struct ipa_client_conn *link = ofd->data; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 180 | int error, ret; |
Harald Welte | 4301c37 | 2011-08-19 13:33:16 +0200 | [diff] [blame] | 181 | socklen_t len = sizeof(error); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 182 | |
| 183 | switch(link->state) { |
Pablo Neira Ayuso | c07a8e7 | 2011-06-21 19:50:04 +0200 | [diff] [blame] | 184 | case IPA_CLIENT_LINK_STATE_CONNECTING: |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 185 | ret = getsockopt(ofd->fd, SOL_SOCKET, SO_ERROR, &error, &len); |
| 186 | if (ret >= 0 && error > 0) { |
| 187 | ipa_client_retry(link); |
| 188 | return 0; |
| 189 | } |
| 190 | ofd->when &= ~BSC_FD_WRITE; |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 191 | LOGP(DLINP, LOGL_NOTICE, "connection done.\n"); |
Pablo Neira Ayuso | c07a8e7 | 2011-06-21 19:50:04 +0200 | [diff] [blame] | 192 | link->state = IPA_CLIENT_LINK_STATE_CONNECTED; |
Pablo Neira Ayuso | 88136fc | 2011-07-08 16:21:55 +0200 | [diff] [blame] | 193 | if (link->connect_cb) |
| 194 | link->connect_cb(link); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 195 | break; |
Pablo Neira Ayuso | c07a8e7 | 2011-06-21 19:50:04 +0200 | [diff] [blame] | 196 | case IPA_CLIENT_LINK_STATE_CONNECTED: |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 197 | if (what & BSC_FD_READ) { |
Pablo Neira Ayuso | 218bb8f | 2011-09-09 01:04:46 +0200 | [diff] [blame] | 198 | LOGP(DLINP, LOGL_DEBUG, "connected read\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 199 | ipa_client_read(link); |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 200 | } |
| 201 | if (what & BSC_FD_WRITE) { |
Pablo Neira Ayuso | 218bb8f | 2011-09-09 01:04:46 +0200 | [diff] [blame] | 202 | LOGP(DLINP, LOGL_DEBUG, "connected write\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 203 | ipa_client_write(link); |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 204 | } |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 205 | break; |
| 206 | default: |
| 207 | break; |
| 208 | } |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | static void ipa_link_timer_cb(void *data); |
| 213 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 214 | struct ipa_client_conn * |
| 215 | ipa_client_conn_create(void *ctx, struct e1inp_ts *ts, |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 216 | int priv_nr, const char *addr, uint16_t port, |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 217 | int (*connect_cb)(struct ipa_client_conn *link), |
| 218 | int (*read_cb)(struct ipa_client_conn *link, |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 219 | struct msgb *msgb), |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 220 | int (*write_cb)(struct ipa_client_conn *link), |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 221 | void *data) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 222 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 223 | struct ipa_client_conn *ipa_link; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 224 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 225 | ipa_link = talloc_zero(ctx, struct ipa_client_conn); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 226 | if (!ipa_link) |
| 227 | return NULL; |
| 228 | |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 229 | if (ts) { |
Pablo Neira Ayuso | 00af772 | 2011-09-08 12:47:06 +0200 | [diff] [blame] | 230 | if (ts->line->driver == NULL) { |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 231 | talloc_free(ipa_link); |
| 232 | return NULL; |
| 233 | } |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 234 | ipa_link->ofd = &ts->driver.ipaccess.fd; |
| 235 | } else { |
| 236 | ipa_link->ofd = talloc_zero(ctx, struct osmo_fd); |
| 237 | if (ipa_link->ofd == NULL) { |
| 238 | talloc_free(ipa_link); |
| 239 | return NULL; |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | ipa_link->ofd->when |= BSC_FD_READ | BSC_FD_WRITE; |
| 244 | ipa_link->ofd->priv_nr = priv_nr; |
| 245 | ipa_link->ofd->cb = ipa_client_fd_cb; |
| 246 | ipa_link->ofd->data = ipa_link; |
Pablo Neira Ayuso | c07a8e7 | 2011-06-21 19:50:04 +0200 | [diff] [blame] | 247 | ipa_link->state = IPA_CLIENT_LINK_STATE_CONNECTING; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 248 | ipa_link->timer.cb = ipa_link_timer_cb; |
| 249 | ipa_link->timer.data = ipa_link; |
Pablo Neira Ayuso | c00ee73 | 2011-06-21 12:22:49 +0200 | [diff] [blame] | 250 | ipa_link->addr = talloc_strdup(ipa_link, addr); |
Pablo Neira Ayuso | 9b3a33c | 2011-06-21 13:52:41 +0200 | [diff] [blame] | 251 | ipa_link->port = port; |
Pablo Neira Ayuso | 88136fc | 2011-07-08 16:21:55 +0200 | [diff] [blame] | 252 | ipa_link->connect_cb = connect_cb; |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 253 | ipa_link->read_cb = read_cb; |
Pablo Neira Ayuso | 8ad30c9 | 2011-09-08 13:29:06 +0200 | [diff] [blame] | 254 | /* default to generic write callback if not set. */ |
| 255 | if (write_cb == NULL) |
| 256 | ipa_link->write_cb = ipa_client_write_default_cb; |
Pablo Neira Ayuso | 81ed759 | 2012-08-22 16:35:17 +0200 | [diff] [blame] | 257 | else |
| 258 | ipa_link->write_cb = write_cb; |
| 259 | |
Pablo Neira Ayuso | 2220a05 | 2011-09-08 18:43:31 +0200 | [diff] [blame] | 260 | if (ts) |
| 261 | ipa_link->line = ts->line; |
Pablo Neira Ayuso | e009f4a | 2011-06-23 13:36:34 +0200 | [diff] [blame] | 262 | ipa_link->data = data; |
Pablo Neira Ayuso | af3fed9 | 2011-06-23 20:42:19 +0200 | [diff] [blame] | 263 | INIT_LLIST_HEAD(&ipa_link->tx_queue); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 264 | |
| 265 | return ipa_link; |
| 266 | } |
| 267 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 268 | void ipa_client_conn_destroy(struct ipa_client_conn *link) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 269 | { |
| 270 | talloc_free(link); |
| 271 | } |
| 272 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 273 | int ipa_client_conn_open(struct ipa_client_conn *link) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 274 | { |
| 275 | int ret; |
| 276 | |
| 277 | ret = osmo_sock_init(AF_INET, SOCK_STREAM, IPPROTO_TCP, |
Pablo Neira Ayuso | 9b3a33c | 2011-06-21 13:52:41 +0200 | [diff] [blame] | 278 | link->addr, link->port, |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 279 | OSMO_SOCK_F_CONNECT|OSMO_SOCK_F_NONBLOCK); |
| 280 | if (ret < 0) { |
| 281 | if (errno != EINPROGRESS) |
| 282 | return ret; |
| 283 | } |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 284 | link->ofd->fd = ret; |
| 285 | if (osmo_fd_register(link->ofd) < 0) { |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 286 | close(ret); |
| 287 | return -EIO; |
| 288 | } |
| 289 | return 0; |
| 290 | } |
| 291 | |
| 292 | static void ipa_link_timer_cb(void *data) |
| 293 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 294 | struct ipa_client_conn *link = data; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 295 | |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 296 | LOGP(DLINP, LOGL_NOTICE, "reconnecting.\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 297 | |
| 298 | switch(link->state) { |
Pablo Neira Ayuso | c07a8e7 | 2011-06-21 19:50:04 +0200 | [diff] [blame] | 299 | case IPA_CLIENT_LINK_STATE_CONNECTING: |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 300 | ipa_client_conn_open(link); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 301 | break; |
| 302 | default: |
| 303 | break; |
| 304 | } |
| 305 | } |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 306 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 307 | void ipa_client_conn_send(struct ipa_client_conn *link, struct msgb *msg) |
Pablo Neira Ayuso | af3fed9 | 2011-06-23 20:42:19 +0200 | [diff] [blame] | 308 | { |
| 309 | msgb_enqueue(&link->tx_queue, msg); |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 310 | link->ofd->when |= BSC_FD_WRITE; |
Pablo Neira Ayuso | af3fed9 | 2011-06-23 20:42:19 +0200 | [diff] [blame] | 311 | } |
| 312 | |
Harald Welte | 7b6fc2e | 2011-08-19 21:58:48 +0200 | [diff] [blame] | 313 | static int ipa_server_fd_cb(struct osmo_fd *ofd, unsigned int what) |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 314 | { |
Pablo Neira Ayuso | cdda0a8 | 2013-07-08 01:13:19 +0200 | [diff] [blame] | 315 | int fd, ret; |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 316 | struct sockaddr_in sa; |
| 317 | socklen_t sa_len = sizeof(sa); |
| 318 | struct ipa_server_link *link = ofd->data; |
| 319 | |
Pablo Neira Ayuso | cdda0a8 | 2013-07-08 01:13:19 +0200 | [diff] [blame] | 320 | fd = accept(ofd->fd, (struct sockaddr *)&sa, &sa_len); |
| 321 | if (fd < 0) { |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 322 | LOGP(DLINP, LOGL_ERROR, "failed to accept from origin " |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 323 | "peer, reason=`%s'\n", strerror(errno)); |
Pablo Neira Ayuso | cdda0a8 | 2013-07-08 01:13:19 +0200 | [diff] [blame] | 324 | return fd; |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 325 | } |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 326 | LOGP(DLINP, LOGL_NOTICE, "accept()ed new link from %s to port %u\n", |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 327 | inet_ntoa(sa.sin_addr), link->port); |
| 328 | |
Pablo Neira Ayuso | cdda0a8 | 2013-07-08 01:13:19 +0200 | [diff] [blame] | 329 | ret = link->accept_cb(link, fd); |
| 330 | if (ret < 0) { |
| 331 | LOGP(DLINP, LOGL_ERROR, |
| 332 | "failed to processs accept()ed new link, " |
| 333 | "reason=`%s'\n", strerror(-ret)); |
| 334 | close(fd); |
| 335 | return ret; |
| 336 | } |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 337 | |
| 338 | return 0; |
| 339 | } |
| 340 | |
| 341 | struct ipa_server_link * |
| 342 | ipa_server_link_create(void *ctx, struct e1inp_line *line, |
| 343 | const char *addr, uint16_t port, |
Pablo Neira Ayuso | e009f4a | 2011-06-23 13:36:34 +0200 | [diff] [blame] | 344 | int (*accept_cb)(struct ipa_server_link *link, int fd), |
| 345 | void *data) |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 346 | { |
| 347 | struct ipa_server_link *ipa_link; |
| 348 | |
Pablo Neira Ayuso | cdda0a8 | 2013-07-08 01:13:19 +0200 | [diff] [blame] | 349 | OSMO_ASSERT(accept_cb != NULL); |
| 350 | |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 351 | ipa_link = talloc_zero(ctx, struct ipa_server_link); |
| 352 | if (!ipa_link) |
| 353 | return NULL; |
| 354 | |
| 355 | ipa_link->ofd.when |= BSC_FD_READ | BSC_FD_WRITE; |
| 356 | ipa_link->ofd.cb = ipa_server_fd_cb; |
| 357 | ipa_link->ofd.data = ipa_link; |
| 358 | ipa_link->addr = talloc_strdup(ipa_link, addr); |
| 359 | ipa_link->port = port; |
| 360 | ipa_link->accept_cb = accept_cb; |
| 361 | ipa_link->line = line; |
Pablo Neira Ayuso | e009f4a | 2011-06-23 13:36:34 +0200 | [diff] [blame] | 362 | ipa_link->data = data; |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 363 | |
| 364 | return ipa_link; |
| 365 | |
| 366 | } |
| 367 | |
| 368 | void ipa_server_link_destroy(struct ipa_server_link *link) |
| 369 | { |
| 370 | talloc_free(link); |
| 371 | } |
| 372 | |
| 373 | int ipa_server_link_open(struct ipa_server_link *link) |
| 374 | { |
| 375 | int ret; |
| 376 | |
| 377 | ret = osmo_sock_init(AF_INET, SOCK_STREAM, IPPROTO_TCP, |
| 378 | link->addr, link->port, OSMO_SOCK_F_BIND); |
| 379 | if (ret < 0) |
| 380 | return ret; |
| 381 | |
| 382 | link->ofd.fd = ret; |
| 383 | if (osmo_fd_register(&link->ofd) < 0) { |
| 384 | close(ret); |
| 385 | return -EIO; |
| 386 | } |
| 387 | return 0; |
| 388 | } |
| 389 | |
| 390 | void ipa_server_link_close(struct ipa_server_link *link) |
| 391 | { |
| 392 | osmo_fd_unregister(&link->ofd); |
| 393 | close(link->ofd.fd); |
| 394 | } |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 395 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 396 | static void ipa_server_conn_read(struct ipa_server_conn *conn) |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 397 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 398 | struct osmo_fd *ofd = &conn->ofd; |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 399 | struct msgb *msg; |
| 400 | int ret; |
| 401 | |
Pablo Neira Ayuso | 218bb8f | 2011-09-09 01:04:46 +0200 | [diff] [blame] | 402 | LOGP(DLINP, LOGL_DEBUG, "message received\n"); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 403 | |
| 404 | ret = ipa_msg_recv(ofd->fd, &msg); |
| 405 | if (ret < 0) { |
| 406 | if (errno == EPIPE || errno == ECONNRESET) { |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 407 | LOGP(DLINP, LOGL_ERROR, "lost connection with server\n"); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 408 | } |
Daniel Willmann | dc4479f | 2011-09-15 12:56:57 +0200 | [diff] [blame] | 409 | ipa_server_conn_destroy(conn); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 410 | return; |
| 411 | } else if (ret == 0) { |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 412 | LOGP(DLINP, LOGL_ERROR, "connection closed with server\n"); |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 413 | ipa_server_conn_destroy(conn); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 414 | return; |
| 415 | } |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 416 | if (conn->cb) |
| 417 | conn->cb(conn, msg); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 418 | |
| 419 | return; |
| 420 | } |
| 421 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 422 | static void ipa_server_conn_write(struct ipa_server_conn *conn) |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 423 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 424 | struct osmo_fd *ofd = &conn->ofd; |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 425 | struct msgb *msg; |
| 426 | struct llist_head *lh; |
| 427 | int ret; |
| 428 | |
Pablo Neira Ayuso | 218bb8f | 2011-09-09 01:04:46 +0200 | [diff] [blame] | 429 | LOGP(DLINP, LOGL_DEBUG, "sending data\n"); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 430 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 431 | if (llist_empty(&conn->tx_queue)) { |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 432 | ofd->when &= ~BSC_FD_WRITE; |
| 433 | return; |
| 434 | } |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 435 | lh = conn->tx_queue.next; |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 436 | llist_del(lh); |
| 437 | msg = llist_entry(lh, struct msgb, list); |
| 438 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 439 | ret = send(conn->ofd.fd, msg->data, msg->len, 0); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 440 | if (ret < 0) { |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 441 | LOGP(DLINP, LOGL_ERROR, "error to send\n"); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 442 | } |
| 443 | msgb_free(msg); |
| 444 | } |
| 445 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 446 | static int ipa_server_conn_cb(struct osmo_fd *ofd, unsigned int what) |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 447 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 448 | struct ipa_server_conn *conn = ofd->data; |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 449 | |
Pablo Neira Ayuso | 218bb8f | 2011-09-09 01:04:46 +0200 | [diff] [blame] | 450 | LOGP(DLINP, LOGL_DEBUG, "connected read/write\n"); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 451 | if (what & BSC_FD_READ) |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 452 | ipa_server_conn_read(conn); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 453 | if (what & BSC_FD_WRITE) |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 454 | ipa_server_conn_write(conn); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 455 | |
| 456 | return 0; |
| 457 | } |
| 458 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 459 | struct ipa_server_conn * |
| 460 | ipa_server_conn_create(void *ctx, struct ipa_server_link *link, int fd, |
| 461 | int (*cb)(struct ipa_server_conn *conn, struct msgb *msg), |
Daniel Willmann | a0d9331 | 2011-09-15 12:56:58 +0200 | [diff] [blame] | 462 | int (*closed_cb)(struct ipa_server_conn *conn), void *data) |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 463 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 464 | struct ipa_server_conn *conn; |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 465 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 466 | conn = talloc_zero(ctx, struct ipa_server_conn); |
| 467 | if (conn == NULL) { |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 468 | LOGP(DLINP, LOGL_ERROR, "cannot allocate new peer in server, " |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 469 | "reason=`%s'\n", strerror(errno)); |
| 470 | return NULL; |
| 471 | } |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 472 | conn->server = link; |
| 473 | conn->ofd.fd = fd; |
| 474 | conn->ofd.data = conn; |
| 475 | conn->ofd.cb = ipa_server_conn_cb; |
| 476 | conn->ofd.when = BSC_FD_READ; |
| 477 | conn->cb = cb; |
Daniel Willmann | a0d9331 | 2011-09-15 12:56:58 +0200 | [diff] [blame] | 478 | conn->closed_cb = closed_cb; |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 479 | conn->data = data; |
| 480 | INIT_LLIST_HEAD(&conn->tx_queue); |
Pablo Neira Ayuso | af3fed9 | 2011-06-23 20:42:19 +0200 | [diff] [blame] | 481 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 482 | if (osmo_fd_register(&conn->ofd) < 0) { |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 483 | LOGP(DLINP, LOGL_ERROR, "could not register FD\n"); |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 484 | talloc_free(conn); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 485 | return NULL; |
| 486 | } |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 487 | return conn; |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 488 | } |
| 489 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 490 | void ipa_server_conn_destroy(struct ipa_server_conn *conn) |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 491 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 492 | close(conn->ofd.fd); |
| 493 | osmo_fd_unregister(&conn->ofd); |
Daniel Willmann | a0d9331 | 2011-09-15 12:56:58 +0200 | [diff] [blame] | 494 | if (conn->closed_cb) |
| 495 | conn->closed_cb(conn); |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 496 | talloc_free(conn); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 497 | } |
Pablo Neira Ayuso | af3fed9 | 2011-06-23 20:42:19 +0200 | [diff] [blame] | 498 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 499 | void ipa_server_conn_send(struct ipa_server_conn *conn, struct msgb *msg) |
Pablo Neira Ayuso | af3fed9 | 2011-06-23 20:42:19 +0200 | [diff] [blame] | 500 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 501 | msgb_enqueue(&conn->tx_queue, msg); |
| 502 | conn->ofd.when |= BSC_FD_WRITE; |
Pablo Neira Ayuso | af3fed9 | 2011-06-23 20:42:19 +0200 | [diff] [blame] | 503 | } |