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 | |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 26 | #define LOGIPA(link, level, fmt, args...) LOGP(DLINP, level, "%s:%u " fmt, link->addr, link->port, ## args) |
| 27 | |
Pablo Neira Ayuso | 88136fc | 2011-07-08 16:21:55 +0200 | [diff] [blame] | 28 | void ipa_msg_push_header(struct msgb *msg, uint8_t proto) |
| 29 | { |
| 30 | struct ipaccess_head *hh; |
| 31 | |
| 32 | msg->l2h = msg->data; |
| 33 | hh = (struct ipaccess_head *) msgb_push(msg, sizeof(*hh)); |
| 34 | hh->proto = proto; |
| 35 | hh->len = htons(msgb_l2len(msg)); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 36 | } |
| 37 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 38 | void ipa_client_conn_close(struct ipa_client_conn *link) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 39 | { |
Harald Welte | e68055b | 2013-06-30 14:21:54 +0200 | [diff] [blame] | 40 | /* be safe against multiple calls */ |
| 41 | if (link->ofd->fd != -1) { |
| 42 | osmo_fd_unregister(link->ofd); |
| 43 | close(link->ofd->fd); |
| 44 | link->ofd->fd = -1; |
| 45 | } |
Jacob Erlbeck | 98af3c3 | 2014-03-31 10:53:32 +0200 | [diff] [blame] | 46 | msgb_free(link->pending_msg); |
| 47 | link->pending_msg = NULL; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 48 | } |
| 49 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 50 | static void ipa_client_read(struct ipa_client_conn *link) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 51 | { |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 52 | struct osmo_fd *ofd = link->ofd; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 53 | struct msgb *msg; |
| 54 | int ret; |
| 55 | |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 56 | LOGIPA(link, LOGL_DEBUG, "message received\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 57 | |
Jacob Erlbeck | 98af3c3 | 2014-03-31 10:53:32 +0200 | [diff] [blame] | 58 | ret = ipa_msg_recv_buffered(ofd->fd, &msg, &link->pending_msg); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 59 | if (ret < 0) { |
Jacob Erlbeck | 98af3c3 | 2014-03-31 10:53:32 +0200 | [diff] [blame] | 60 | if (ret == -EAGAIN) |
| 61 | return; |
| 62 | if (ret == -EPIPE || ret == -ECONNRESET) |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 63 | LOGIPA(link, LOGL_ERROR, "lost connection with server\n"); |
Harald Welte | 51de9ca | 2013-06-30 20:13:16 +0200 | [diff] [blame] | 64 | ipa_client_conn_close(link); |
| 65 | if (link->updown_cb) |
| 66 | link->updown_cb(link, 0); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 67 | return; |
| 68 | } else if (ret == 0) { |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 69 | LOGIPA(link, LOGL_ERROR, "connection closed with server\n"); |
Harald Welte | 51de9ca | 2013-06-30 20:13:16 +0200 | [diff] [blame] | 70 | ipa_client_conn_close(link); |
| 71 | if (link->updown_cb) |
| 72 | link->updown_cb(link, 0); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 73 | return; |
| 74 | } |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 75 | if (link->read_cb) |
| 76 | link->read_cb(link, msg); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 77 | } |
| 78 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 79 | static void ipa_client_write(struct ipa_client_conn *link) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 80 | { |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 81 | if (link->write_cb) |
| 82 | link->write_cb(link); |
| 83 | } |
| 84 | |
Pablo Neira Ayuso | 8ad30c9 | 2011-09-08 13:29:06 +0200 | [diff] [blame] | 85 | 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] | 86 | { |
| 87 | struct osmo_fd *ofd = link->ofd; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 88 | struct msgb *msg; |
| 89 | struct llist_head *lh; |
| 90 | int ret; |
| 91 | |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 92 | LOGIPA(link, LOGL_DEBUG, "sending data\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 93 | |
| 94 | if (llist_empty(&link->tx_queue)) { |
| 95 | ofd->when &= ~BSC_FD_WRITE; |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 96 | return 0; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 97 | } |
| 98 | lh = link->tx_queue.next; |
| 99 | llist_del(lh); |
| 100 | msg = llist_entry(lh, struct msgb, list); |
| 101 | |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 102 | ret = send(link->ofd->fd, msg->data, msg->len, 0); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 103 | if (ret < 0) { |
| 104 | if (errno == EPIPE || errno == ENOTCONN) { |
Harald Welte | 51de9ca | 2013-06-30 20:13:16 +0200 | [diff] [blame] | 105 | ipa_client_conn_close(link); |
| 106 | if (link->updown_cb) |
| 107 | link->updown_cb(link, 0); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 108 | } |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 109 | LOGIPA(link, LOGL_ERROR, "error to send\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 110 | } |
| 111 | msgb_free(msg); |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 112 | return 0; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 113 | } |
| 114 | |
Harald Welte | 7b6fc2e | 2011-08-19 21:58:48 +0200 | [diff] [blame] | 115 | 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] | 116 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 117 | struct ipa_client_conn *link = ofd->data; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 118 | int error, ret; |
Harald Welte | 4301c37 | 2011-08-19 13:33:16 +0200 | [diff] [blame] | 119 | socklen_t len = sizeof(error); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 120 | |
| 121 | switch(link->state) { |
Pablo Neira Ayuso | c07a8e7 | 2011-06-21 19:50:04 +0200 | [diff] [blame] | 122 | case IPA_CLIENT_LINK_STATE_CONNECTING: |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 123 | ret = getsockopt(ofd->fd, SOL_SOCKET, SO_ERROR, &error, &len); |
| 124 | if (ret >= 0 && error > 0) { |
Harald Welte | 51de9ca | 2013-06-30 20:13:16 +0200 | [diff] [blame] | 125 | ipa_client_conn_close(link); |
| 126 | if (link->updown_cb) |
| 127 | link->updown_cb(link, 0); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 128 | return 0; |
| 129 | } |
| 130 | ofd->when &= ~BSC_FD_WRITE; |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 131 | LOGIPA(link, LOGL_NOTICE, "connection done\n"); |
Pablo Neira Ayuso | c07a8e7 | 2011-06-21 19:50:04 +0200 | [diff] [blame] | 132 | link->state = IPA_CLIENT_LINK_STATE_CONNECTED; |
Harald Welte | 51de9ca | 2013-06-30 20:13:16 +0200 | [diff] [blame] | 133 | if (link->updown_cb) |
| 134 | link->updown_cb(link, 1); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 135 | break; |
Pablo Neira Ayuso | c07a8e7 | 2011-06-21 19:50:04 +0200 | [diff] [blame] | 136 | case IPA_CLIENT_LINK_STATE_CONNECTED: |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 137 | if (what & BSC_FD_READ) { |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 138 | LOGIPA(link, LOGL_DEBUG, "connected read\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 139 | ipa_client_read(link); |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 140 | } |
| 141 | if (what & BSC_FD_WRITE) { |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 142 | LOGIPA(link, LOGL_DEBUG, "connected write\n"); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 143 | ipa_client_write(link); |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 144 | } |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 145 | break; |
| 146 | default: |
| 147 | break; |
| 148 | } |
| 149 | return 0; |
| 150 | } |
| 151 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 152 | struct ipa_client_conn * |
| 153 | ipa_client_conn_create(void *ctx, struct e1inp_ts *ts, |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 154 | int priv_nr, const char *addr, uint16_t port, |
Harald Welte | 51de9ca | 2013-06-30 20:13:16 +0200 | [diff] [blame] | 155 | void (*updown_cb)(struct ipa_client_conn *link, int up), |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 156 | int (*read_cb)(struct ipa_client_conn *link, |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 157 | struct msgb *msgb), |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 158 | int (*write_cb)(struct ipa_client_conn *link), |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 159 | void *data) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 160 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 161 | struct ipa_client_conn *ipa_link; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 162 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 163 | ipa_link = talloc_zero(ctx, struct ipa_client_conn); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 164 | if (!ipa_link) |
| 165 | return NULL; |
| 166 | |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 167 | if (ts) { |
Pablo Neira Ayuso | 00af772 | 2011-09-08 12:47:06 +0200 | [diff] [blame] | 168 | if (ts->line->driver == NULL) { |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 169 | talloc_free(ipa_link); |
| 170 | return NULL; |
| 171 | } |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 172 | ipa_link->ofd = &ts->driver.ipaccess.fd; |
| 173 | } else { |
| 174 | ipa_link->ofd = talloc_zero(ctx, struct osmo_fd); |
| 175 | if (ipa_link->ofd == NULL) { |
| 176 | talloc_free(ipa_link); |
| 177 | return NULL; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | ipa_link->ofd->when |= BSC_FD_READ | BSC_FD_WRITE; |
| 182 | ipa_link->ofd->priv_nr = priv_nr; |
| 183 | ipa_link->ofd->cb = ipa_client_fd_cb; |
| 184 | ipa_link->ofd->data = ipa_link; |
Harald Welte | 51de9ca | 2013-06-30 20:13:16 +0200 | [diff] [blame] | 185 | ipa_link->ofd->fd = -1; |
Pablo Neira Ayuso | c07a8e7 | 2011-06-21 19:50:04 +0200 | [diff] [blame] | 186 | ipa_link->state = IPA_CLIENT_LINK_STATE_CONNECTING; |
Pablo Neira Ayuso | c00ee73 | 2011-06-21 12:22:49 +0200 | [diff] [blame] | 187 | ipa_link->addr = talloc_strdup(ipa_link, addr); |
Pablo Neira Ayuso | 9b3a33c | 2011-06-21 13:52:41 +0200 | [diff] [blame] | 188 | ipa_link->port = port; |
Harald Welte | 51de9ca | 2013-06-30 20:13:16 +0200 | [diff] [blame] | 189 | ipa_link->updown_cb = updown_cb; |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 190 | ipa_link->read_cb = read_cb; |
Pablo Neira Ayuso | 8ad30c9 | 2011-09-08 13:29:06 +0200 | [diff] [blame] | 191 | /* default to generic write callback if not set. */ |
| 192 | if (write_cb == NULL) |
| 193 | ipa_link->write_cb = ipa_client_write_default_cb; |
Pablo Neira Ayuso | 81ed759 | 2012-08-22 16:35:17 +0200 | [diff] [blame] | 194 | else |
| 195 | ipa_link->write_cb = write_cb; |
| 196 | |
Pablo Neira Ayuso | 2220a05 | 2011-09-08 18:43:31 +0200 | [diff] [blame] | 197 | if (ts) |
| 198 | ipa_link->line = ts->line; |
Pablo Neira Ayuso | e009f4a | 2011-06-23 13:36:34 +0200 | [diff] [blame] | 199 | ipa_link->data = data; |
Pablo Neira Ayuso | af3fed9 | 2011-06-23 20:42:19 +0200 | [diff] [blame] | 200 | INIT_LLIST_HEAD(&ipa_link->tx_queue); |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 201 | |
| 202 | return ipa_link; |
| 203 | } |
| 204 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 205 | void ipa_client_conn_destroy(struct ipa_client_conn *link) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 206 | { |
| 207 | talloc_free(link); |
| 208 | } |
| 209 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 210 | int ipa_client_conn_open(struct ipa_client_conn *link) |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 211 | { |
| 212 | int ret; |
| 213 | |
Harald Welte | e7e1b75 | 2014-08-17 21:41:34 +0200 | [diff] [blame] | 214 | link->state = IPA_CLIENT_LINK_STATE_CONNECTING; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 215 | ret = osmo_sock_init(AF_INET, SOCK_STREAM, IPPROTO_TCP, |
Pablo Neira Ayuso | 9b3a33c | 2011-06-21 13:52:41 +0200 | [diff] [blame] | 216 | link->addr, link->port, |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 217 | OSMO_SOCK_F_CONNECT|OSMO_SOCK_F_NONBLOCK); |
Harald Welte | 14dd30a | 2016-11-26 09:37:09 +0100 | [diff] [blame] | 218 | if (ret < 0) |
| 219 | return ret; |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 220 | link->ofd->fd = ret; |
Holger Hans Peter Freyther | 687046b | 2014-12-12 17:39:58 +0100 | [diff] [blame] | 221 | link->ofd->when |= BSC_FD_WRITE; |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 222 | if (osmo_fd_register(link->ofd) < 0) { |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 223 | close(ret); |
Harald Welte | 51de9ca | 2013-06-30 20:13:16 +0200 | [diff] [blame] | 224 | link->ofd->fd = -1; |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 225 | return -EIO; |
| 226 | } |
Harald Welte | 51de9ca | 2013-06-30 20:13:16 +0200 | [diff] [blame] | 227 | |
Pablo Neira Ayuso | 96e8128 | 2011-06-09 15:06:11 +0200 | [diff] [blame] | 228 | return 0; |
| 229 | } |
| 230 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 231 | 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] | 232 | { |
| 233 | msgb_enqueue(&link->tx_queue, msg); |
Pablo Neira Ayuso | c9c4fd3 | 2011-06-30 12:19:42 +0200 | [diff] [blame] | 234 | link->ofd->when |= BSC_FD_WRITE; |
Pablo Neira Ayuso | af3fed9 | 2011-06-23 20:42:19 +0200 | [diff] [blame] | 235 | } |
| 236 | |
Holger Hans Peter Freyther | 9087859 | 2015-01-18 17:50:05 +0100 | [diff] [blame] | 237 | size_t ipa_client_conn_clear_queue(struct ipa_client_conn *link) |
| 238 | { |
| 239 | size_t deleted = 0; |
| 240 | |
| 241 | while (!llist_empty(&link->tx_queue)) { |
| 242 | struct msgb *msg = msgb_dequeue(&link->tx_queue); |
| 243 | msgb_free(msg); |
| 244 | deleted += 1; |
| 245 | } |
| 246 | |
| 247 | link->ofd->when &= ~BSC_FD_WRITE; |
| 248 | return deleted; |
| 249 | } |
| 250 | |
Harald Welte | 7b6fc2e | 2011-08-19 21:58:48 +0200 | [diff] [blame] | 251 | 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] | 252 | { |
Pablo Neira Ayuso | cdda0a8 | 2013-07-08 01:13:19 +0200 | [diff] [blame] | 253 | int fd, ret; |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 254 | struct sockaddr_in sa; |
| 255 | socklen_t sa_len = sizeof(sa); |
| 256 | struct ipa_server_link *link = ofd->data; |
| 257 | |
Pablo Neira Ayuso | cdda0a8 | 2013-07-08 01:13:19 +0200 | [diff] [blame] | 258 | fd = accept(ofd->fd, (struct sockaddr *)&sa, &sa_len); |
| 259 | if (fd < 0) { |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 260 | LOGP(DLINP, LOGL_ERROR, "failed to accept from origin " |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 261 | "peer, reason=`%s'\n", strerror(errno)); |
Pablo Neira Ayuso | cdda0a8 | 2013-07-08 01:13:19 +0200 | [diff] [blame] | 262 | return fd; |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 263 | } |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 264 | 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] | 265 | inet_ntoa(sa.sin_addr), link->port); |
| 266 | |
Pablo Neira Ayuso | cdda0a8 | 2013-07-08 01:13:19 +0200 | [diff] [blame] | 267 | ret = link->accept_cb(link, fd); |
| 268 | if (ret < 0) { |
| 269 | LOGP(DLINP, LOGL_ERROR, |
| 270 | "failed to processs accept()ed new link, " |
| 271 | "reason=`%s'\n", strerror(-ret)); |
| 272 | close(fd); |
| 273 | return ret; |
| 274 | } |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 275 | |
| 276 | return 0; |
| 277 | } |
| 278 | |
| 279 | struct ipa_server_link * |
| 280 | ipa_server_link_create(void *ctx, struct e1inp_line *line, |
| 281 | const char *addr, uint16_t port, |
Pablo Neira Ayuso | e009f4a | 2011-06-23 13:36:34 +0200 | [diff] [blame] | 282 | int (*accept_cb)(struct ipa_server_link *link, int fd), |
| 283 | void *data) |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 284 | { |
| 285 | struct ipa_server_link *ipa_link; |
| 286 | |
Pablo Neira Ayuso | cdda0a8 | 2013-07-08 01:13:19 +0200 | [diff] [blame] | 287 | OSMO_ASSERT(accept_cb != NULL); |
| 288 | |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 289 | ipa_link = talloc_zero(ctx, struct ipa_server_link); |
| 290 | if (!ipa_link) |
| 291 | return NULL; |
| 292 | |
| 293 | ipa_link->ofd.when |= BSC_FD_READ | BSC_FD_WRITE; |
| 294 | ipa_link->ofd.cb = ipa_server_fd_cb; |
| 295 | ipa_link->ofd.data = ipa_link; |
| 296 | ipa_link->addr = talloc_strdup(ipa_link, addr); |
| 297 | ipa_link->port = port; |
| 298 | ipa_link->accept_cb = accept_cb; |
| 299 | ipa_link->line = line; |
Pablo Neira Ayuso | e009f4a | 2011-06-23 13:36:34 +0200 | [diff] [blame] | 300 | ipa_link->data = data; |
Pablo Neira Ayuso | 986191f | 2011-06-21 19:56:26 +0200 | [diff] [blame] | 301 | |
| 302 | return ipa_link; |
| 303 | |
| 304 | } |
| 305 | |
| 306 | void ipa_server_link_destroy(struct ipa_server_link *link) |
| 307 | { |
| 308 | talloc_free(link); |
| 309 | } |
| 310 | |
| 311 | int ipa_server_link_open(struct ipa_server_link *link) |
| 312 | { |
| 313 | int ret; |
| 314 | |
| 315 | ret = osmo_sock_init(AF_INET, SOCK_STREAM, IPPROTO_TCP, |
| 316 | link->addr, link->port, OSMO_SOCK_F_BIND); |
| 317 | if (ret < 0) |
| 318 | return ret; |
| 319 | |
| 320 | link->ofd.fd = ret; |
| 321 | if (osmo_fd_register(&link->ofd) < 0) { |
| 322 | close(ret); |
| 323 | return -EIO; |
| 324 | } |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | void ipa_server_link_close(struct ipa_server_link *link) |
| 329 | { |
| 330 | osmo_fd_unregister(&link->ofd); |
| 331 | close(link->ofd.fd); |
| 332 | } |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 333 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 334 | static void ipa_server_conn_read(struct ipa_server_conn *conn) |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 335 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 336 | struct osmo_fd *ofd = &conn->ofd; |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 337 | struct msgb *msg; |
| 338 | int ret; |
| 339 | |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 340 | LOGIPA(conn, LOGL_DEBUG, "message received\n"); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 341 | |
Jacob Erlbeck | 98af3c3 | 2014-03-31 10:53:32 +0200 | [diff] [blame] | 342 | ret = ipa_msg_recv_buffered(ofd->fd, &msg, &conn->pending_msg); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 343 | if (ret < 0) { |
Jacob Erlbeck | 98af3c3 | 2014-03-31 10:53:32 +0200 | [diff] [blame] | 344 | if (ret == -EAGAIN) |
| 345 | return; |
| 346 | if (ret == -EPIPE || ret == -ECONNRESET) |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 347 | LOGIPA(conn, LOGL_ERROR, "lost connection with server\n"); |
Daniel Willmann | dc4479f | 2011-09-15 12:56:57 +0200 | [diff] [blame] | 348 | ipa_server_conn_destroy(conn); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 349 | return; |
| 350 | } else if (ret == 0) { |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 351 | LOGIPA(conn, LOGL_ERROR, "connection closed with server\n"); |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 352 | ipa_server_conn_destroy(conn); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 353 | return; |
| 354 | } |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 355 | if (conn->cb) |
| 356 | conn->cb(conn, msg); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 357 | |
| 358 | return; |
| 359 | } |
| 360 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 361 | static void ipa_server_conn_write(struct ipa_server_conn *conn) |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 362 | { |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 363 | struct msgb *msg; |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 364 | int ret; |
| 365 | |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 366 | LOGIPA(conn, LOGL_DEBUG, "sending data\n"); |
Neels Hofmeyr | 01543a1 | 2017-09-14 04:32:19 +0200 | [diff] [blame] | 367 | msg = msgb_dequeue(&conn->tx_queue); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 368 | |
Neels Hofmeyr | 01543a1 | 2017-09-14 04:32:19 +0200 | [diff] [blame] | 369 | if (!msg) { |
| 370 | conn->ofd.when &= ~BSC_FD_WRITE; |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 371 | return; |
| 372 | } |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 373 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 374 | ret = send(conn->ofd.fd, msg->data, msg->len, 0); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 375 | if (ret < 0) { |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 376 | LOGIPA(conn, LOGL_ERROR, "error to send\n"); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 377 | } |
| 378 | msgb_free(msg); |
| 379 | } |
| 380 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 381 | 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] | 382 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 383 | struct ipa_server_conn *conn = ofd->data; |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 384 | |
Pablo Neira Ayuso | 218bb8f | 2011-09-09 01:04:46 +0200 | [diff] [blame] | 385 | LOGP(DLINP, LOGL_DEBUG, "connected read/write\n"); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 386 | if (what & BSC_FD_READ) |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 387 | ipa_server_conn_read(conn); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 388 | if (what & BSC_FD_WRITE) |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 389 | ipa_server_conn_write(conn); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 390 | |
| 391 | return 0; |
| 392 | } |
| 393 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 394 | struct ipa_server_conn * |
| 395 | ipa_server_conn_create(void *ctx, struct ipa_server_link *link, int fd, |
| 396 | int (*cb)(struct ipa_server_conn *conn, struct msgb *msg), |
Daniel Willmann | a0d9331 | 2011-09-15 12:56:58 +0200 | [diff] [blame] | 397 | int (*closed_cb)(struct ipa_server_conn *conn), void *data) |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 398 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 399 | struct ipa_server_conn *conn; |
Harald Welte | b2d727a | 2016-04-28 07:53:49 +0200 | [diff] [blame] | 400 | struct sockaddr_in sa; |
| 401 | socklen_t sa_len = sizeof(sa); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 402 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 403 | conn = talloc_zero(ctx, struct ipa_server_conn); |
| 404 | if (conn == NULL) { |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 405 | LOGP(DLINP, LOGL_ERROR, "cannot allocate new peer in server, " |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 406 | "reason=`%s'\n", strerror(errno)); |
| 407 | return NULL; |
| 408 | } |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 409 | conn->server = link; |
| 410 | conn->ofd.fd = fd; |
| 411 | conn->ofd.data = conn; |
| 412 | conn->ofd.cb = ipa_server_conn_cb; |
| 413 | conn->ofd.when = BSC_FD_READ; |
| 414 | conn->cb = cb; |
Daniel Willmann | a0d9331 | 2011-09-15 12:56:58 +0200 | [diff] [blame] | 415 | conn->closed_cb = closed_cb; |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 416 | conn->data = data; |
| 417 | INIT_LLIST_HEAD(&conn->tx_queue); |
Pablo Neira Ayuso | af3fed9 | 2011-06-23 20:42:19 +0200 | [diff] [blame] | 418 | |
Harald Welte | b2d727a | 2016-04-28 07:53:49 +0200 | [diff] [blame] | 419 | if (!getpeername(fd, (struct sockaddr *)&sa, &sa_len)) { |
| 420 | char *str = inet_ntoa(sa.sin_addr); |
| 421 | conn->addr = talloc_strdup(conn, str); |
| 422 | conn->port = ntohs(sa.sin_port); |
| 423 | } |
| 424 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 425 | if (osmo_fd_register(&conn->ofd) < 0) { |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 426 | LOGP(DLINP, LOGL_ERROR, "could not register FD\n"); |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 427 | talloc_free(conn); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 428 | return NULL; |
| 429 | } |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 430 | return conn; |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 431 | } |
| 432 | |
Harald Welte | 12814b9 | 2016-04-28 07:54:31 +0200 | [diff] [blame] | 433 | int ipa_server_conn_ccm(struct ipa_server_conn *conn, struct msgb *msg) |
| 434 | { |
| 435 | struct tlv_parsed tlvp; |
| 436 | uint8_t msg_type = *(msg->l2h); |
| 437 | struct ipaccess_unit unit_data = {}; |
| 438 | char *unitid; |
| 439 | int len, rc; |
| 440 | |
| 441 | /* shared CCM handling on both server and client */ |
| 442 | rc = ipa_ccm_rcvmsg_base(msg, &conn->ofd); |
| 443 | switch (rc) { |
| 444 | case -1: |
| 445 | /* error in IPA CCM processing */ |
| 446 | goto err; |
| 447 | case 1: |
| 448 | /* IPA CCM message that was handled in _base */ |
| 449 | return 0; |
| 450 | case 0: |
| 451 | /* IPA CCM message that we need to handle */ |
| 452 | break; |
| 453 | default: |
| 454 | /* Error */ |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 455 | LOGIPA(conn, LOGL_ERROR, "Unexpected return from " |
Harald Welte | 12814b9 | 2016-04-28 07:54:31 +0200 | [diff] [blame] | 456 | "ipa_ccm_rcvmsg_base: %d\n", rc); |
| 457 | goto err; |
| 458 | } |
| 459 | |
| 460 | switch (msg_type) { |
| 461 | case IPAC_MSGT_ID_RESP: |
Harald Welte | 82eb55e | 2018-08-01 13:22:55 +0200 | [diff] [blame] | 462 | rc = ipa_ccm_id_resp_parse(&tlvp, (const uint8_t *)msg->l2h+1, msgb_l2len(msg)-1); |
Harald Welte | 12814b9 | 2016-04-28 07:54:31 +0200 | [diff] [blame] | 463 | if (rc < 0) { |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 464 | LOGIPA(conn, LOGL_ERROR, "IPA CCM RESPonse with " |
Harald Welte | 12814b9 | 2016-04-28 07:54:31 +0200 | [diff] [blame] | 465 | "malformed TLVs\n"); |
| 466 | goto err; |
| 467 | } |
| 468 | if (!TLVP_PRESENT(&tlvp, IPAC_IDTAG_UNIT)) { |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 469 | LOGIPA(conn, LOGL_ERROR, "IPA CCM RESP without " |
Harald Welte | 12814b9 | 2016-04-28 07:54:31 +0200 | [diff] [blame] | 470 | "unit ID\n"); |
| 471 | goto err; |
| 472 | } |
| 473 | len = TLVP_LEN(&tlvp, IPAC_IDTAG_UNIT); |
| 474 | if (len < 1) { |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 475 | LOGIPA(conn, LOGL_ERROR, "IPA CCM RESP with short" |
Harald Welte | 12814b9 | 2016-04-28 07:54:31 +0200 | [diff] [blame] | 476 | "unit ID\n"); |
| 477 | goto err; |
| 478 | } |
| 479 | unitid = (char *) TLVP_VAL(&tlvp, IPAC_IDTAG_UNIT); |
| 480 | unitid[len-1] = '\0'; |
| 481 | ipa_parse_unitid(unitid, &unit_data); |
| 482 | |
| 483 | /* FIXME */ |
| 484 | rc = conn->ccm_cb(conn, msg, &tlvp, &unit_data); |
| 485 | if (rc < 0) |
| 486 | goto err; |
| 487 | break; |
| 488 | default: |
Max | f446367 | 2018-02-13 15:17:27 +0100 | [diff] [blame] | 489 | LOGIPA(conn, LOGL_ERROR, "Unknown IPA message type\n"); |
Harald Welte | 12814b9 | 2016-04-28 07:54:31 +0200 | [diff] [blame] | 490 | break; |
| 491 | } |
| 492 | return 0; |
| 493 | err: |
| 494 | /* in case of any error, we close the connection */ |
| 495 | ipa_server_conn_destroy(conn); |
| 496 | return -1; |
| 497 | } |
| 498 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 499 | void ipa_server_conn_destroy(struct ipa_server_conn *conn) |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 500 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 501 | close(conn->ofd.fd); |
Jacob Erlbeck | 98af3c3 | 2014-03-31 10:53:32 +0200 | [diff] [blame] | 502 | msgb_free(conn->pending_msg); |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 503 | osmo_fd_unregister(&conn->ofd); |
Daniel Willmann | a0d9331 | 2011-09-15 12:56:58 +0200 | [diff] [blame] | 504 | if (conn->closed_cb) |
| 505 | conn->closed_cb(conn); |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 506 | talloc_free(conn); |
Pablo Neira Ayuso | 6af9b61 | 2011-06-23 14:07:47 +0200 | [diff] [blame] | 507 | } |
Pablo Neira Ayuso | af3fed9 | 2011-06-23 20:42:19 +0200 | [diff] [blame] | 508 | |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 509 | 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] | 510 | { |
Pablo Neira Ayuso | f099567 | 2011-09-08 12:58:38 +0200 | [diff] [blame] | 511 | msgb_enqueue(&conn->tx_queue, msg); |
| 512 | conn->ofd.when |= BSC_FD_WRITE; |
Pablo Neira Ayuso | af3fed9 | 2011-06-23 20:42:19 +0200 | [diff] [blame] | 513 | } |