1961 lines
55 KiB
C
1961 lines
55 KiB
C
/* Core SS7 Instance/Linkset/Link/AS/ASP Handling */
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/* (C) 2015-2017 by Harald Welte <laforge@gnumonks.org>
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* All Rights Reserved
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <inttypes.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <netinet/sctp.h>
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#include <osmocom/sigtran/osmo_ss7.h>
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#include <osmocom/sigtran/mtp_sap.h>
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#include <osmocom/sigtran/protocol/mtp.h>
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#include <osmocom/sigtran/protocol/sua.h>
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#include <osmocom/sigtran/protocol/m3ua.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/select.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/socket.h>
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#include <osmocom/netif/stream.h>
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#include <osmocom/netif/ipa.h>
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#include "sccp_internal.h"
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#include "xua_internal.h"
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#include "xua_asp_fsm.h"
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#include "xua_as_fsm.h"
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#define MAX_PC_STR_LEN 32
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static bool ss7_initialized = false;
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LLIST_HEAD(osmo_ss7_instances);
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static int32_t next_rctx = 1;
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static int32_t next_l_rk_id = 1;
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struct value_string osmo_ss7_as_traffic_mode_vals[] = {
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{ OSMO_SS7_AS_TMOD_BCAST, "broadcast" },
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{ OSMO_SS7_AS_TMOD_LOADSHARE, "loadshare" },
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{ OSMO_SS7_AS_TMOD_ROUNDROBIN, "round-robin" },
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{ OSMO_SS7_AS_TMOD_OVERRIDE, "override" },
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{ 0, NULL }
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};
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struct value_string osmo_ss7_asp_protocol_vals[] = {
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{ OSMO_SS7_ASP_PROT_NONE, "none" },
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{ OSMO_SS7_ASP_PROT_SUA, "sua" },
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{ OSMO_SS7_ASP_PROT_M3UA, "m3ua" },
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{ OSMO_SS7_ASP_PROT_IPA, "ipa" },
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{ 0, NULL }
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};
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#define LOGSS7(inst, level, fmt, args ...) \
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LOGP(DLSS7, level, "%u: " fmt, inst ? (inst)->cfg.id : 0, ## args)
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static int asp_proto_to_ip_proto(enum osmo_ss7_asp_protocol proto)
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{
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switch (proto) {
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case OSMO_SS7_ASP_PROT_IPA:
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return IPPROTO_TCP;
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case OSMO_SS7_ASP_PROT_SUA:
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case OSMO_SS7_ASP_PROT_M3UA:
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default:
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return IPPROTO_SCTP;
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}
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}
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int osmo_ss7_find_free_rctx(struct osmo_ss7_instance *inst)
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{
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int32_t rctx;
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for (rctx = next_rctx; rctx; rctx = ++next_rctx) {
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if (!osmo_ss7_as_find_by_rctx(inst, next_rctx))
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return rctx;
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}
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return -1;
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}
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static uint32_t find_free_l_rk_id(struct osmo_ss7_instance *inst)
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{
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uint32_t l_rk_id;
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for (l_rk_id = next_l_rk_id; next_l_rk_id; l_rk_id = ++next_l_rk_id) {
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if (!osmo_ss7_as_find_by_l_rk_id(inst, next_l_rk_id))
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return l_rk_id;
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}
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return -1;
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}
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/***********************************************************************
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* SS7 Point Code Parsing / Printing
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***********************************************************************/
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static const struct osmo_ss7_pc_fmt default_pc_fmt = {
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.delimiter = '.',
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.component_len = { 3, 8, 3},
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};
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/* like strcat() but appends a single character */
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static int strnappendchar(char *str, char c, size_t n)
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{
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unsigned int curlen = strlen(str);
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if (n < curlen + 2)
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return -1;
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str[curlen] = c;
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str[curlen+1] = '\0';
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return curlen+1;
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}
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/* generate a format string for formatting a point code. The result can
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* e.g. be used with sscanf() or sprintf() */
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static const char *gen_pc_fmtstr(const struct osmo_ss7_pc_fmt *pc_fmt,
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unsigned int *num_comp_exp)
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{
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static char buf[MAX_PC_STR_LEN];
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unsigned int num_comp = 0;
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buf[0] = '\0';
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strcat(buf, "%u");
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num_comp++;
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if (pc_fmt->component_len[1] == 0)
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goto out;
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strnappendchar(buf, pc_fmt->delimiter, sizeof(buf));
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strcat(buf, "%u");
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num_comp++;
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if (pc_fmt->component_len[2] == 0)
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goto out;
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strnappendchar(buf, pc_fmt->delimiter, sizeof(buf));
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strcat(buf, "%u");
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num_comp++;
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out:
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if (num_comp_exp)
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*num_comp_exp = num_comp;
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return buf;
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}
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/* get number of components we expect for a point code, depending on the
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* configuration of this ss7_instance */
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static unsigned int num_pc_comp_exp(const struct osmo_ss7_pc_fmt *pc_fmt)
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{
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unsigned int num_comp_exp = 1;
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if (pc_fmt->component_len[1])
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num_comp_exp++;
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if (pc_fmt->component_len[2])
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num_comp_exp++;
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return num_comp_exp;
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}
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/* get the total width (in bits) of the point-codes in this ss7_instance */
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uint8_t osmo_ss7_pc_width(const struct osmo_ss7_pc_fmt *pc_fmt)
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{
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return pc_fmt->component_len[0] + pc_fmt->component_len[1] + pc_fmt->component_len[2];
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}
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/* get the number of bits we must shift the given component of a point
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* code in this ss7_instance */
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static unsigned int get_pc_comp_shift(const struct osmo_ss7_pc_fmt *pc_fmt,
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unsigned int comp_num)
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{
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uint32_t pc_width = osmo_ss7_pc_width(pc_fmt);
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switch (comp_num) {
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case 0:
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return pc_width - pc_fmt->component_len[0];
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case 1:
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return pc_width - pc_fmt->component_len[0] - pc_fmt->component_len[1];
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case 2:
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return 0;
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default:
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/* Invalid number of components */
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OSMO_ASSERT(false);
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}
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}
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static uint32_t pc_comp_shift_and_mask(const struct osmo_ss7_pc_fmt *pc_fmt,
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unsigned int comp_num, uint32_t pc)
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{
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unsigned int shift = get_pc_comp_shift(pc_fmt, comp_num);
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uint32_t mask = (1 << pc_fmt->component_len[comp_num]) - 1;
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return (pc >> shift) & mask;
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}
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/* parse a point code according to the structure configured for this
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* ss7_instance */
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int osmo_ss7_pointcode_parse(struct osmo_ss7_instance *inst, const char *str)
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{
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unsigned int component[3];
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const struct osmo_ss7_pc_fmt *pc_fmt = inst ? &inst->cfg.pc_fmt : &default_pc_fmt;
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unsigned int num_comp_exp = num_pc_comp_exp(pc_fmt);
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const char *fmtstr = gen_pc_fmtstr(pc_fmt, &num_comp_exp);
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int i, rc;
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rc = sscanf(str, fmtstr, &component[0], &component[1], &component[2]);
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/* ensure all components were parsed */
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if (rc != num_comp_exp)
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goto err;
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/* check none of the component values exceeds what can be
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* represented within its bit-width */
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for (i = 0; i < num_comp_exp; i++) {
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if (component[i] >= (1 << pc_fmt->component_len[i]))
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goto err;
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}
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/* shift them all together */
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rc = (component[0] << get_pc_comp_shift(pc_fmt, 0));
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if (num_comp_exp > 1)
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rc |= (component[1] << get_pc_comp_shift(pc_fmt, 1));
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if (num_comp_exp > 2)
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rc |= (component[2] << get_pc_comp_shift(pc_fmt, 2));
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return rc;
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err:
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LOGSS7(inst, LOGL_NOTICE, "Error parsing Pointcode '%s'\n", str);
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return -EINVAL;
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}
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const char *_osmo_ss7_pointcode_print(char *buf, size_t len, const struct osmo_ss7_instance *inst, uint32_t pc)
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{
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const struct osmo_ss7_pc_fmt *pc_fmt;
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unsigned int num_comp_exp;
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const char *fmtstr;
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if (!osmo_ss7_pc_is_valid(pc))
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return "(no PC)";
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pc_fmt = inst ? &inst->cfg.pc_fmt : &default_pc_fmt;
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num_comp_exp = num_pc_comp_exp(pc_fmt);
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fmtstr = gen_pc_fmtstr(pc_fmt, &num_comp_exp);
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OSMO_ASSERT(fmtstr);
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snprintf(buf, len, fmtstr,
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pc_comp_shift_and_mask(pc_fmt, 0, pc),
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pc_comp_shift_and_mask(pc_fmt, 1, pc),
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pc_comp_shift_and_mask(pc_fmt, 2, pc));
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return buf;
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}
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/* print a pointcode according to the structure configured for this
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* ss7_instance */
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const char *osmo_ss7_pointcode_print(const struct osmo_ss7_instance *inst, uint32_t pc)
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{
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static char buf[MAX_PC_STR_LEN];
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return _osmo_ss7_pointcode_print(buf, sizeof(buf), inst, pc);
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}
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/* same as osmo_ss7_pointcode_print() but using a separate buffer, useful for multiple point codes in the
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* same LOGP/printf. */
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const char *osmo_ss7_pointcode_print2(const struct osmo_ss7_instance *inst, uint32_t pc)
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{
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static char buf[MAX_PC_STR_LEN];
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return _osmo_ss7_pointcode_print(buf, sizeof(buf), inst, pc);
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}
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int osmo_ss7_pointcode_parse_mask_or_len(struct osmo_ss7_instance *inst, const char *in)
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{
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unsigned int width = osmo_ss7_pc_width(inst ? &inst->cfg.pc_fmt : &default_pc_fmt);
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if (in[0] == '/') {
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/* parse mask by length */
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int masklen = atoi(in+1);
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if (masklen < 0 || masklen > 32)
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return -EINVAL;
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if (masklen == 0)
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return 0;
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return (0xFFFFFFFF << (width - masklen)) & ((1 << width)-1);
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} else {
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/* parse mask as point code */
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return osmo_ss7_pointcode_parse(inst, in);
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}
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}
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static const uint16_t prot2port[] = {
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[OSMO_SS7_ASP_PROT_NONE] = 0,
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[OSMO_SS7_ASP_PROT_SUA] = SUA_PORT,
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[OSMO_SS7_ASP_PROT_M3UA] = M3UA_PORT,
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[OSMO_SS7_ASP_PROT_IPA] = 5000,
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};
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int osmo_ss7_asp_protocol_port(enum osmo_ss7_asp_protocol prot)
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{
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if (prot >= ARRAY_SIZE(prot2port))
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return -EINVAL;
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else
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return prot2port[prot];
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}
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/***********************************************************************
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* SS7 Instance
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***********************************************************************/
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/*! \brief Find a SS7 Instance with given ID
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* \param[in] id ID for which to search
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* \returns \ref osmo_ss7_instance on success; NULL on error */
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struct osmo_ss7_instance *
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osmo_ss7_instance_find(uint32_t id)
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{
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OSMO_ASSERT(ss7_initialized);
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struct osmo_ss7_instance *inst;
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llist_for_each_entry(inst, &osmo_ss7_instances, list) {
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if (inst->cfg.id == id)
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return inst;
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}
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return NULL;
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}
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/*! \brief Find or create a SS7 Instance
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* \param[in] ctx talloc allocation context to use for allocations
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* \param[in] id ID of SS7 Instance
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* \returns \ref osmo_ss7_instance on success; NULL on error */
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struct osmo_ss7_instance *
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osmo_ss7_instance_find_or_create(void *ctx, uint32_t id)
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{
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struct osmo_ss7_instance *inst;
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OSMO_ASSERT(ss7_initialized);
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inst = osmo_ss7_instance_find(id);
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if (inst)
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return inst;
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inst = talloc_zero(ctx, struct osmo_ss7_instance);
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if (!inst)
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return NULL;
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inst->cfg.primary_pc = OSMO_SS7_PC_INVALID;
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inst->cfg.id = id;
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LOGSS7(inst, LOGL_INFO, "Creating SS7 Instance\n");
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INIT_LLIST_HEAD(&inst->linksets);
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INIT_LLIST_HEAD(&inst->as_list);
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INIT_LLIST_HEAD(&inst->asp_list);
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INIT_LLIST_HEAD(&inst->rtable_list);
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INIT_LLIST_HEAD(&inst->xua_servers);
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inst->rtable_system = osmo_ss7_route_table_find_or_create(inst, "system");
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/* default point code structure + formatting */
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inst->cfg.pc_fmt.delimiter = '.';
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inst->cfg.pc_fmt.component_len[0] = 3;
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inst->cfg.pc_fmt.component_len[1] = 8;
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inst->cfg.pc_fmt.component_len[2] = 3;
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llist_add(&inst->list, &osmo_ss7_instances);
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INIT_LLIST_HEAD(&inst->cfg.sccp_address_book);
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return inst;
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}
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/*! \brief Destroy a SS7 Instance
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* \param[in] inst SS7 Instance to be destroyed */
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void osmo_ss7_instance_destroy(struct osmo_ss7_instance *inst)
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{
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struct osmo_ss7_linkset *lset;
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struct osmo_ss7_as *as;
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struct osmo_ss7_asp *asp;
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OSMO_ASSERT(ss7_initialized);
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LOGSS7(inst, LOGL_INFO, "Destroying SS7 Instance\n");
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llist_for_each_entry(asp, &inst->asp_list, list)
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osmo_ss7_asp_destroy(asp);
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llist_for_each_entry(as, &inst->as_list, list)
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osmo_ss7_as_destroy(as);
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llist_for_each_entry(lset, &inst->linksets, list)
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osmo_ss7_linkset_destroy(lset);
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llist_del(&inst->list);
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talloc_free(inst);
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}
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/*! \brief Set the point code format used in given SS7 instance */
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int osmo_ss7_instance_set_pc_fmt(struct osmo_ss7_instance *inst,
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uint8_t c0, uint8_t c1, uint8_t c2)
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{
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if (c0+c1+c2 > 32)
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return -EINVAL;
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if (c0+c1+c2 > 14)
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LOGSS7(inst, LOGL_NOTICE, "Point Code Format %u-%u-%u "
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"is longer than 14 bits, odd?\n", c0, c1, c2);
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inst->cfg.pc_fmt.component_len[0] = c0;
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inst->cfg.pc_fmt.component_len[1] = c1;
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inst->cfg.pc_fmt.component_len[2] = c2;
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return 0;
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}
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/*! \brief bind all xUA servers belonging to an SS7 Instance
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* \param[in] inst SS7 Instance to apply the socket binding (and start listening)
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* \returns 0 on success; negative value on error */
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int osmo_ss7_instance_bind(struct osmo_ss7_instance *inst)
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{
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struct osmo_xua_server *oxs;
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int rc = 0;
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llist_for_each_entry(oxs, &inst->xua_servers, list) {
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if (osmo_ss7_xua_server_bind(oxs) < 0) {
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LOGSS7(inst, LOGL_ERROR, "Unable to bind xUA server %s:%u\n",
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oxs->cfg.local.host, oxs->cfg.local.port);
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rc = -1;
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}
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}
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return rc;
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}
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/*! \brief bind all xUA servers on each of the stored SS7 instances
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* \returns 0 on success; negative value on error */
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int osmo_ss7_bind_all_instances()
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{
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OSMO_ASSERT(ss7_initialized);
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struct osmo_ss7_instance *inst;
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int rc = 0;
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llist_for_each_entry(inst, &osmo_ss7_instances, list) {
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if (osmo_ss7_instance_bind(inst) < 0 ) {
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LOGSS7(inst, LOGL_ERROR, "Unable to bind all xUA servers in ss7 instance\n");
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rc = -1;
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}
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}
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return rc;
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}
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/*! Allocate an SCCP instance, if not present yet.
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* \returns inst->sccp. */
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struct osmo_sccp_instance *osmo_ss7_ensure_sccp(struct osmo_ss7_instance *inst)
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{
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if (inst->sccp)
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return inst->sccp;
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LOGSS7(inst, LOGL_NOTICE, "Creating SCCP instance\n");
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inst->sccp = osmo_sccp_instance_create(inst, NULL);
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return inst->sccp;
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}
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/***********************************************************************
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* MTP Users (Users of MTP, such as SCCP or ISUP)
|
|
***********************************************************************/
|
|
|
|
/*! \brief Register a MTP user for a given service indicator
|
|
* \param[in] inst SS7 instance for which we register the user
|
|
* \param[in] service_ind Service (ISUP, SCCP, ...)
|
|
* \param[in] user SS7 user (including primitive call-back)
|
|
* \returns 0 on success; negative on error */
|
|
int osmo_ss7_user_register(struct osmo_ss7_instance *inst, uint8_t service_ind,
|
|
struct osmo_ss7_user *user)
|
|
{
|
|
if (service_ind >= ARRAY_SIZE(inst->user))
|
|
return -EINVAL;
|
|
|
|
if (inst->user[service_ind])
|
|
return -EBUSY;
|
|
|
|
DEBUGP(DLSS7, "registering user=%s for SI %u with priv %p\n",
|
|
user->name, service_ind, user->priv);
|
|
|
|
user->inst = inst;
|
|
inst->user[service_ind] = user;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! \brief Unregister a MTP user for a given service indicator
|
|
* \param[in] inst SS7 instance for which we register the user
|
|
* \param[in] service_ind Service (ISUP, SCCP, ...)
|
|
* \param[in] user (optional) SS7 user. If present, we will not
|
|
* unregister other users
|
|
* \returns 0 on success; negative on error */
|
|
int osmo_ss7_user_unregister(struct osmo_ss7_instance *inst, uint8_t service_ind,
|
|
struct osmo_ss7_user *user)
|
|
{
|
|
if (service_ind >= ARRAY_SIZE(inst->user))
|
|
return -EINVAL;
|
|
|
|
if (!inst->user[service_ind])
|
|
return -ENODEV;
|
|
|
|
if (user && (inst->user[service_ind] != user))
|
|
return -EINVAL;
|
|
|
|
if (user)
|
|
user->inst = NULL;
|
|
inst->user[service_ind] = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* deliver to a local MTP user */
|
|
int osmo_ss7_mtp_to_user(struct osmo_ss7_instance *inst, struct osmo_mtp_prim *omp)
|
|
{
|
|
uint32_t service_ind;
|
|
const struct osmo_ss7_user *osu;
|
|
|
|
if (omp->oph.sap != MTP_SAP_USER ||
|
|
omp->oph.primitive != OSMO_MTP_PRIM_TRANSFER ||
|
|
omp->oph.operation != PRIM_OP_INDICATION) {
|
|
LOGP(DLSS7, LOGL_ERROR, "Unsupported Primitive\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
service_ind = omp->u.transfer.sio & 0xF;
|
|
osu = inst->user[service_ind];
|
|
|
|
if (!osu) {
|
|
LOGP(DLSS7, LOGL_NOTICE, "No MTP-User for SI %u\n", service_ind);
|
|
return -ENODEV;
|
|
}
|
|
|
|
DEBUGP(DLSS7, "delivering MTP-TRANSFER.ind to user %s, priv=%p\n",
|
|
osu->name, osu->priv);
|
|
return osu->prim_cb(&omp->oph, (void *) osu->priv);
|
|
}
|
|
|
|
/***********************************************************************
|
|
* SS7 Linkset
|
|
***********************************************************************/
|
|
|
|
/*! \brief Destroy a SS7 Linkset
|
|
* \param[in] lset Linkset to be destroyed */
|
|
void osmo_ss7_linkset_destroy(struct osmo_ss7_linkset *lset)
|
|
{
|
|
struct osmo_ss7_route *rt, *rt2;
|
|
unsigned int i;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
LOGSS7(lset->inst, LOGL_INFO, "Destroying Linkset %s\n",
|
|
lset->cfg.name);
|
|
|
|
/* find any routes pointing to this AS and remove them */
|
|
llist_for_each_entry_safe(rt, rt2, &lset->inst->rtable_system->routes, list) {
|
|
if (rt->dest.linkset == lset)
|
|
osmo_ss7_route_destroy(rt);
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(lset->links); i++) {
|
|
struct osmo_ss7_link *link = lset->links[i];
|
|
if (!link)
|
|
continue;
|
|
osmo_ss7_link_destroy(link);
|
|
}
|
|
llist_del(&lset->list);
|
|
talloc_free(lset);
|
|
}
|
|
|
|
/*! \brief Find SS7 Linkset by given name
|
|
* \param[in] inst SS7 Instance in which to look
|
|
* \param[in] name Name of SS7 Linkset
|
|
* \returns pointer to linkset on success; NULL on error */
|
|
struct osmo_ss7_linkset *
|
|
osmo_ss7_linkset_find_by_name(struct osmo_ss7_instance *inst, const char *name)
|
|
{
|
|
struct osmo_ss7_linkset *lset;
|
|
OSMO_ASSERT(ss7_initialized);
|
|
llist_for_each_entry(lset, &inst->linksets, list) {
|
|
if (!strcmp(name, lset->cfg.name))
|
|
return lset;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*! \brief Find or allocate SS7 Linkset
|
|
* \param[in] inst SS7 Instance in which we operate
|
|
* \param[in] name Name of SS7 Linkset
|
|
* \param[in] pc Adjacent Pointcode
|
|
* \returns pointer to Linkset on success; NULL on error */
|
|
struct osmo_ss7_linkset *
|
|
osmo_ss7_linkset_find_or_create(struct osmo_ss7_instance *inst, const char *name, uint32_t pc)
|
|
{
|
|
struct osmo_ss7_linkset *lset;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
lset = osmo_ss7_linkset_find_by_name(inst, name);
|
|
if (lset && lset->cfg.adjacent_pc != pc)
|
|
return NULL;
|
|
|
|
if (!lset) {
|
|
LOGSS7(inst, LOGL_INFO, "Creating Linkset %s\n", name);
|
|
lset = talloc_zero(inst, struct osmo_ss7_linkset);
|
|
lset->inst = inst;
|
|
lset->cfg.adjacent_pc = pc;
|
|
lset->cfg.name = talloc_strdup(lset, name);
|
|
llist_add_tail(&lset->list, &inst->linksets);
|
|
}
|
|
|
|
return lset;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* SS7 Link
|
|
***********************************************************************/
|
|
|
|
/*! \brief Destryo SS7 Link
|
|
* \param[in] link SS7 Link to be destroyed */
|
|
void osmo_ss7_link_destroy(struct osmo_ss7_link *link)
|
|
{
|
|
struct osmo_ss7_linkset *lset = link->linkset;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
LOGSS7(lset->inst, LOGL_INFO, "Destroying Link %s:%u\n",
|
|
lset->cfg.name, link->cfg.id);
|
|
/* FIXME: do cleanup */
|
|
lset->links[link->cfg.id] = NULL;
|
|
talloc_free(link);
|
|
}
|
|
|
|
/*! \brief Find or create SS7 Link with given ID in given Linkset
|
|
* \param[in] lset SS7 Linkset on which we operate
|
|
* \param[in] id Link number within Linkset
|
|
* \returns pointer to SS7 Link on success; NULL on error */
|
|
struct osmo_ss7_link *
|
|
osmo_ss7_link_find_or_create(struct osmo_ss7_linkset *lset, uint32_t id)
|
|
{
|
|
struct osmo_ss7_link *link;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
if (id >= ARRAY_SIZE(lset->links))
|
|
return NULL;
|
|
|
|
if (lset->links[id]) {
|
|
link = lset->links[id];
|
|
} else {
|
|
LOGSS7(lset->inst, LOGL_INFO, "Creating Link %s:%u\n",
|
|
lset->cfg.name, id);
|
|
link = talloc_zero(lset, struct osmo_ss7_link);
|
|
if (!link)
|
|
return NULL;
|
|
link->linkset = lset;
|
|
lset->links[id] = link;
|
|
link->cfg.id = id;
|
|
}
|
|
|
|
return link;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* SS7 Route Tables
|
|
***********************************************************************/
|
|
|
|
struct osmo_ss7_route_table *
|
|
osmo_ss7_route_table_find(struct osmo_ss7_instance *inst, const char *name)
|
|
{
|
|
struct osmo_ss7_route_table *rtbl;
|
|
OSMO_ASSERT(ss7_initialized);
|
|
llist_for_each_entry(rtbl, &inst->rtable_list, list) {
|
|
if (!strcmp(rtbl->cfg.name, name))
|
|
return rtbl;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
struct osmo_ss7_route_table *
|
|
osmo_ss7_route_table_find_or_create(struct osmo_ss7_instance *inst, const char *name)
|
|
{
|
|
struct osmo_ss7_route_table *rtbl;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
rtbl = osmo_ss7_route_table_find(inst, name);
|
|
if (!rtbl) {
|
|
LOGSS7(inst, LOGL_INFO, "Creating Route Table %s\n", name);
|
|
rtbl = talloc_zero(inst, struct osmo_ss7_route_table);
|
|
rtbl->inst = inst;
|
|
rtbl->cfg.name = talloc_strdup(rtbl, name);
|
|
INIT_LLIST_HEAD(&rtbl->routes);
|
|
llist_add_tail(&rtbl->list, &inst->rtable_list);
|
|
}
|
|
return rtbl;
|
|
}
|
|
|
|
void osmo_ss7_route_table_destroy(struct osmo_ss7_route_table *rtbl)
|
|
{
|
|
llist_del(&rtbl->list);
|
|
/* routes are allocated as children of route table, will be
|
|
* automatically freed() */
|
|
talloc_free(rtbl);
|
|
}
|
|
|
|
/***********************************************************************
|
|
* SS7 Routes
|
|
***********************************************************************/
|
|
|
|
/*! \brief Find a SS7 route for given destination point code in given table */
|
|
struct osmo_ss7_route *
|
|
osmo_ss7_route_find_dpc(struct osmo_ss7_route_table *rtbl, uint32_t dpc)
|
|
{
|
|
struct osmo_ss7_route *rt;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
/* we assume the routes are sorted by mask length, i.e. more
|
|
* specific routes first, and less specific routes with shorter
|
|
* mask later */
|
|
llist_for_each_entry(rt, &rtbl->routes, list) {
|
|
if ((dpc & rt->cfg.mask) == rt->cfg.pc)
|
|
return rt;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*! \brief Find a SS7 route for given destination point code + mask in given table */
|
|
struct osmo_ss7_route *
|
|
osmo_ss7_route_find_dpc_mask(struct osmo_ss7_route_table *rtbl, uint32_t dpc,
|
|
uint32_t mask)
|
|
{
|
|
struct osmo_ss7_route *rt;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
/* we assume the routes are sorted by mask length, i.e. more
|
|
* specific routes first, and less specific routes with shorter
|
|
* mask later */
|
|
llist_for_each_entry(rt, &rtbl->routes, list) {
|
|
if (dpc == rt->cfg.pc && mask == rt->cfg.mask)
|
|
return rt;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*! \brief Find a SS7 route for given destination point code in given SS7 */
|
|
struct osmo_ss7_route *
|
|
osmo_ss7_route_lookup(struct osmo_ss7_instance *inst, uint32_t dpc)
|
|
{
|
|
OSMO_ASSERT(ss7_initialized);
|
|
return osmo_ss7_route_find_dpc(inst->rtable_system, dpc);
|
|
}
|
|
|
|
/* insert the route in the ordered list of routes. The list is sorted by
|
|
* mask length, so that the more specific (longer mask) routes are
|
|
* first, while the less specific routes with shorter masks are last.
|
|
* Hence, the first matching route in a linear iteration is the most
|
|
* specific match. */
|
|
static void route_insert_sorted(struct osmo_ss7_route_table *rtbl,
|
|
struct osmo_ss7_route *cmp)
|
|
{
|
|
struct osmo_ss7_route *rt;
|
|
|
|
llist_for_each_entry(rt, &rtbl->routes, list) {
|
|
if (rt->cfg.mask < cmp->cfg.mask) {
|
|
/* insert before the current entry */
|
|
llist_add(&cmp->list, rt->list.prev);
|
|
return;
|
|
}
|
|
}
|
|
/* not added, i.e. no smaller mask length found: we are the
|
|
* smallest mask and thus should go last */
|
|
llist_add_tail(&cmp->list, &rtbl->routes);
|
|
}
|
|
|
|
/*! \brief Create a new route in the given routing table
|
|
* \param[in] rtbl Routing Table in which the route is to be created
|
|
* \param[in] pc Point Code of the destination of the route
|
|
* \param[in] mask Mask of the destination Point Code \ref pc
|
|
* \param[in] linkset_name string name of the linkset to be used
|
|
* \returns caller-allocated + initialized route, NULL on error
|
|
*/
|
|
struct osmo_ss7_route *
|
|
osmo_ss7_route_create(struct osmo_ss7_route_table *rtbl, uint32_t pc,
|
|
uint32_t mask, const char *linkset_name)
|
|
{
|
|
struct osmo_ss7_route *rt;
|
|
struct osmo_ss7_linkset *lset;
|
|
struct osmo_ss7_as *as = NULL;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
lset = osmo_ss7_linkset_find_by_name(rtbl->inst, linkset_name);
|
|
if (!lset) {
|
|
as = osmo_ss7_as_find_by_name(rtbl->inst, linkset_name);
|
|
if (!as)
|
|
return NULL;
|
|
}
|
|
|
|
rt = talloc_zero(rtbl, struct osmo_ss7_route);
|
|
if (!rt)
|
|
return NULL;
|
|
|
|
rt->cfg.pc = pc;
|
|
rt->cfg.mask = mask;
|
|
rt->cfg.linkset_name = talloc_strdup(rt, linkset_name);
|
|
if (lset) {
|
|
rt->dest.linkset = lset;
|
|
LOGSS7(rtbl->inst, LOGL_INFO, "Creating route: pc=%u=%s mask=0x%x via linkset '%s'\n",
|
|
pc, osmo_ss7_pointcode_print(rtbl->inst, pc), mask, lset->cfg.name);
|
|
} else {
|
|
rt->dest.as = as;
|
|
LOGSS7(rtbl->inst, LOGL_INFO, "Creating route: pc=%u=%s mask=0x%x via AS '%s'\n",
|
|
pc, osmo_ss7_pointcode_print(rtbl->inst, pc), mask, as->cfg.name);
|
|
}
|
|
rt->rtable = rtbl;
|
|
|
|
route_insert_sorted(rtbl, rt);
|
|
|
|
return rt;
|
|
}
|
|
|
|
/*! \brief Destroy a given SS7 route */
|
|
void osmo_ss7_route_destroy(struct osmo_ss7_route *rt)
|
|
{
|
|
OSMO_ASSERT(ss7_initialized);
|
|
llist_del(&rt->list);
|
|
talloc_free(rt);
|
|
}
|
|
|
|
/***********************************************************************
|
|
* SS7 Application Server
|
|
***********************************************************************/
|
|
|
|
/*! \brief Find Application Server by given name
|
|
* \param[in] inst SS7 Instance on which we operate
|
|
* \param[in] name Name of AS
|
|
* \returns pointer to Application Server on success; NULL otherwise */
|
|
struct osmo_ss7_as *
|
|
osmo_ss7_as_find_by_name(struct osmo_ss7_instance *inst, const char *name)
|
|
{
|
|
struct osmo_ss7_as *as;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
llist_for_each_entry(as, &inst->as_list, list) {
|
|
if (!strcmp(name, as->cfg.name))
|
|
return as;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*! \brief Find Application Server by given routing context
|
|
* \param[in] inst SS7 Instance on which we operate
|
|
* \param[in] rctx Routing Context
|
|
* \returns pointer to Application Server on success; NULL otherwise */
|
|
struct osmo_ss7_as *
|
|
osmo_ss7_as_find_by_rctx(struct osmo_ss7_instance *inst, uint32_t rctx)
|
|
{
|
|
struct osmo_ss7_as *as;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
llist_for_each_entry(as, &inst->as_list, list) {
|
|
if (as->cfg.routing_key.context == rctx)
|
|
return as;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*! \brief Find Application Server by given local routing key ID
|
|
* \param[in] inst SS7 Instance on which we operate
|
|
* \param[in] l_rk_id Local Routing Key ID
|
|
* \returns pointer to Application Server on success; NULL otherwise */
|
|
struct osmo_ss7_as *
|
|
osmo_ss7_as_find_by_l_rk_id(struct osmo_ss7_instance *inst, uint32_t l_rk_id)
|
|
{
|
|
struct osmo_ss7_as *as;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
llist_for_each_entry(as, &inst->as_list, list) {
|
|
if (as->cfg.routing_key.l_rk_id == l_rk_id)
|
|
return as;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*! \brief Find Application Server (AS) by given protocol.
|
|
* \param[in] inst SS7 Instance on which we operate
|
|
* \param[in] proto Protocol identifier that must match
|
|
* \returns pointer to AS on success; NULL otherwise
|
|
* If an AS has an ASP also matching the given protocol, that AS is preferred.
|
|
* If there are multiple matches, return the first matching AS. */
|
|
struct osmo_ss7_as *osmo_ss7_as_find_by_proto(struct osmo_ss7_instance *inst,
|
|
enum osmo_ss7_asp_protocol proto)
|
|
{
|
|
struct osmo_ss7_as *as;
|
|
struct osmo_ss7_as *as_without_asp = NULL;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
|
|
/* Loop through the list with AS and try to find one where the proto
|
|
matches up */
|
|
llist_for_each_entry(as, &inst->as_list, list) {
|
|
if (as->cfg.proto == proto) {
|
|
|
|
/* Put down the first AS that matches the proto, just in
|
|
* case we will not find any matching ASP */
|
|
if (!as_without_asp)
|
|
as_without_asp = as;
|
|
|
|
/* Check if the candicate we have here has any suitable
|
|
* ASP */
|
|
if (osmo_ss7_asp_find_by_proto(as, proto))
|
|
return as;
|
|
}
|
|
}
|
|
|
|
/* Return with the second best find, if there is any */
|
|
return as_without_asp;
|
|
}
|
|
|
|
/*! \brief Find or Create Application Server
|
|
* \param[in] inst SS7 Instance on which we operate
|
|
* \param[in] name Name of Application Server
|
|
* \param[in] proto Protocol of Application Server
|
|
* \returns pointer to Application Server on suuccess; NULL otherwise */
|
|
struct osmo_ss7_as *
|
|
osmo_ss7_as_find_or_create(struct osmo_ss7_instance *inst, const char *name,
|
|
enum osmo_ss7_asp_protocol proto)
|
|
{
|
|
struct osmo_ss7_as *as;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
as = osmo_ss7_as_find_by_name(inst, name);
|
|
|
|
if (as && as->cfg.proto != proto)
|
|
return NULL;
|
|
|
|
if (!as) {
|
|
LOGSS7(inst, LOGL_INFO, "Creating AS %s\n", name);
|
|
as = talloc_zero(inst, struct osmo_ss7_as);
|
|
if (!as)
|
|
return NULL;
|
|
as->inst = inst;
|
|
as->cfg.name = talloc_strdup(as, name);
|
|
as->cfg.proto = proto;
|
|
as->cfg.mode = OSMO_SS7_AS_TMOD_LOADSHARE;
|
|
as->cfg.recovery_timeout_msec = 2000;
|
|
as->cfg.routing_key.l_rk_id = find_free_l_rk_id(inst);
|
|
as->fi = xua_as_fsm_start(as, LOGL_DEBUG);
|
|
llist_add_tail(&as->list, &inst->as_list);
|
|
}
|
|
|
|
return as;
|
|
}
|
|
|
|
/*! \brief Add given ASP to given AS
|
|
* \param[in] as Application Server to which \ref asp is added
|
|
* \param[in] asp Application Server Process to be added to \ref as
|
|
* \returns 0 on success; negative in case of error */
|
|
int osmo_ss7_as_add_asp(struct osmo_ss7_as *as, const char *asp_name)
|
|
{
|
|
struct osmo_ss7_asp *asp;
|
|
unsigned int i;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
asp = osmo_ss7_asp_find_by_name(as->inst, asp_name);
|
|
if (!asp)
|
|
return -ENODEV;
|
|
|
|
LOGSS7(as->inst, LOGL_INFO, "Adding ASP %s to AS %s\n",
|
|
asp->cfg.name, as->cfg.name);
|
|
|
|
if (osmo_ss7_as_has_asp(as, asp))
|
|
return 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(as->cfg.asps); i++) {
|
|
if (!as->cfg.asps[i]) {
|
|
as->cfg.asps[i] = asp;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -ENOSPC;
|
|
}
|
|
|
|
/*! \brief Delete given ASP from given AS
|
|
* \param[in] as Application Server from which \ref asp is deleted
|
|
* \param[in] asp Application Server Process to delete from \ref as
|
|
* \returns 0 on success; negative in case of error */
|
|
int osmo_ss7_as_del_asp(struct osmo_ss7_as *as, const char *asp_name)
|
|
{
|
|
struct osmo_ss7_asp *asp;
|
|
unsigned int i;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
asp = osmo_ss7_asp_find_by_name(as->inst, asp_name);
|
|
if (!asp)
|
|
return -ENODEV;
|
|
|
|
LOGSS7(as->inst, LOGL_INFO, "Removing ASP %s from AS %s\n",
|
|
asp->cfg.name, as->cfg.name);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(as->cfg.asps); i++) {
|
|
if (as->cfg.asps[i] == asp) {
|
|
as->cfg.asps[i] = NULL;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*! \brief Destroy given Application Server
|
|
* \param[in] as Application Server to destroy */
|
|
void osmo_ss7_as_destroy(struct osmo_ss7_as *as)
|
|
{
|
|
struct osmo_ss7_route *rt, *rt2;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
LOGSS7(as->inst, LOGL_INFO, "Destroying AS %s\n", as->cfg.name);
|
|
|
|
if (as->fi)
|
|
osmo_fsm_inst_term(as->fi, OSMO_FSM_TERM_REQUEST, NULL);
|
|
|
|
/* find any routes pointing to this AS and remove them */
|
|
llist_for_each_entry_safe(rt, rt2, &as->inst->rtable_system->routes, list) {
|
|
if (rt->dest.as == as)
|
|
osmo_ss7_route_destroy(rt);
|
|
}
|
|
|
|
as->inst = NULL;
|
|
llist_del(&as->list);
|
|
talloc_free(as);
|
|
}
|
|
|
|
/*! \brief Determine if given AS contains ASP
|
|
* \param[in] as Application Server in which to look for \ref asp
|
|
* \param[in] asp Application Server Process to look for in \ref as
|
|
* \returns true in case \ref asp is part of \ref as; false otherwise */
|
|
bool osmo_ss7_as_has_asp(struct osmo_ss7_as *as,
|
|
struct osmo_ss7_asp *asp)
|
|
{
|
|
unsigned int i;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
for (i = 0; i < ARRAY_SIZE(as->cfg.asps); i++) {
|
|
if (as->cfg.asps[i] == asp)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* SS7 Application Server Process
|
|
***********************************************************************/
|
|
|
|
struct osmo_ss7_asp *
|
|
osmo_ss7_asp_find_by_name(struct osmo_ss7_instance *inst, const char *name)
|
|
{
|
|
struct osmo_ss7_asp *asp;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
llist_for_each_entry(asp, &inst->asp_list, list) {
|
|
if (!strcmp(name, asp->cfg.name))
|
|
return asp;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static uint16_t get_in_port(struct sockaddr *sa)
|
|
{
|
|
switch (sa->sa_family) {
|
|
case AF_INET:
|
|
return (((struct sockaddr_in*)sa)->sin_port);
|
|
case AF_INET6:
|
|
return (((struct sockaddr_in6*)sa)->sin6_port);
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*! \brief Find an ASP definition matching the local+remote IP/PORT of given fd
|
|
* \param[in] fd socket descriptor of given socket
|
|
* \returns SS7 ASP in case a matching one is found; NULL otherwise */
|
|
static struct osmo_ss7_asp *
|
|
osmo_ss7_asp_find_by_socket_addr(int fd)
|
|
{
|
|
struct osmo_ss7_instance *inst;
|
|
struct sockaddr sa_l, sa_r;
|
|
socklen_t sa_len_l = sizeof(sa_l);
|
|
socklen_t sa_len_r = sizeof(sa_r);
|
|
char hostbuf_l[64], hostbuf_r[64];
|
|
uint16_t local_port, remote_port;
|
|
int rc;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
/* convert local and remote IP to string */
|
|
rc = getsockname(fd, &sa_l, &sa_len_l);
|
|
if (rc < 0)
|
|
return NULL;
|
|
rc = getnameinfo(&sa_l, sa_len_l, hostbuf_l, sizeof(hostbuf_l),
|
|
NULL, 0, NI_NUMERICHOST);
|
|
if (rc < 0)
|
|
return NULL;
|
|
local_port = ntohs(get_in_port(&sa_l));
|
|
|
|
rc = getpeername(fd, &sa_r, &sa_len_r);
|
|
if (rc < 0)
|
|
return NULL;
|
|
rc = getnameinfo(&sa_r, sa_len_r, hostbuf_r, sizeof(hostbuf_r),
|
|
NULL, 0, NI_NUMERICHOST);
|
|
if (rc < 0)
|
|
return NULL;
|
|
remote_port = ntohs(get_in_port(&sa_r));
|
|
|
|
/* check all instances for any ASP definition matching the
|
|
* address combination of local/remote ip/port */
|
|
llist_for_each_entry(inst, &osmo_ss7_instances, list) {
|
|
struct osmo_ss7_asp *asp;
|
|
llist_for_each_entry(asp, &inst->asp_list, list) {
|
|
if (asp->cfg.local.port == local_port &&
|
|
(!asp->cfg.remote.port ||asp->cfg.remote.port == remote_port) &&
|
|
(!asp->cfg.local.host || !strcmp(asp->cfg.local.host, hostbuf_l)) &&
|
|
(!asp->cfg.remote.host || !strcmp(asp->cfg.remote.host, hostbuf_r)))
|
|
return asp;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*! \brief Find an ASP that matches the given protocol.
|
|
* \param[in] as Application Server in which to look for \ref asp
|
|
* \returns SS7 ASP in case a matching one is found; NULL otherwise */
|
|
struct osmo_ss7_asp
|
|
*osmo_ss7_asp_find_by_proto(struct osmo_ss7_as *as,
|
|
enum osmo_ss7_asp_protocol proto)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(as->cfg.asps); i++) {
|
|
if (as->cfg.asps[i] && as->cfg.asps[i]->cfg.proto == proto)
|
|
return as->cfg.asps[i];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct osmo_ss7_asp *
|
|
osmo_ss7_asp_find_or_create(struct osmo_ss7_instance *inst, const char *name,
|
|
uint16_t remote_port, uint16_t local_port,
|
|
enum osmo_ss7_asp_protocol proto)
|
|
{
|
|
struct osmo_ss7_asp *asp;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
asp = osmo_ss7_asp_find_by_name(inst, name);
|
|
|
|
if (asp && (asp->cfg.remote.port != remote_port ||
|
|
asp->cfg.local.port != local_port ||
|
|
asp->cfg.proto != proto))
|
|
return NULL;
|
|
|
|
if (!asp) {
|
|
/* FIXME: check if local port has SCTP? */
|
|
asp = talloc_zero(inst, struct osmo_ss7_asp);
|
|
asp->inst = inst;
|
|
asp->cfg.remote.port = remote_port;
|
|
asp->cfg.local.port = local_port;
|
|
asp->cfg.proto = proto;
|
|
asp->cfg.name = talloc_strdup(asp, name);
|
|
llist_add_tail(&asp->list, &inst->asp_list);
|
|
|
|
/* The SUA code internally needs SCCP to work */
|
|
if (proto == OSMO_SS7_ASP_PROT_SUA)
|
|
osmo_ss7_ensure_sccp(inst);
|
|
|
|
}
|
|
return asp;
|
|
}
|
|
|
|
void osmo_ss7_asp_destroy(struct osmo_ss7_asp *asp)
|
|
{
|
|
struct osmo_ss7_as *as;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
LOGSS7(asp->inst, LOGL_INFO, "Destroying ASP %s\n", asp->cfg.name);
|
|
|
|
if (asp->server)
|
|
osmo_stream_srv_destroy(asp->server);
|
|
if (asp->client)
|
|
osmo_stream_cli_destroy(asp->client);
|
|
if (asp->fi)
|
|
osmo_fsm_inst_term(asp->fi, OSMO_FSM_TERM_REQUEST, NULL);
|
|
if (asp->xua_server)
|
|
llist_del(&asp->siblings);
|
|
|
|
/* unlink from all ASs we are part of */
|
|
llist_for_each_entry(as, &asp->inst->as_list, list) {
|
|
unsigned int i;
|
|
for (i = 0; i < ARRAY_SIZE(as->cfg.asps); i++) {
|
|
if (as->cfg.asps[i] == asp) {
|
|
as->cfg.asps[i] = NULL;
|
|
}
|
|
}
|
|
}
|
|
/* unlink from ss7_instance */
|
|
asp->inst = NULL;
|
|
llist_del(&asp->list);
|
|
/* release memory */
|
|
talloc_free(asp);
|
|
}
|
|
|
|
static int xua_cli_read_cb(struct osmo_stream_cli *conn);
|
|
static int ipa_cli_read_cb(struct osmo_stream_cli *conn);
|
|
static int xua_cli_connect_cb(struct osmo_stream_cli *cli);
|
|
|
|
int osmo_ss7_asp_restart(struct osmo_ss7_asp *asp)
|
|
{
|
|
int rc;
|
|
enum xua_asp_role role;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
LOGSS7(asp->inst, LOGL_INFO, "Restarting ASP %s\n", asp->cfg.name);
|
|
|
|
if (!asp->cfg.is_server) {
|
|
/* We are in client mode now */
|
|
if (asp->server) {
|
|
/* if we previously were in server mode,
|
|
* destroy it */
|
|
osmo_stream_srv_destroy(asp->server);
|
|
asp->server = NULL;
|
|
}
|
|
if (!asp->client)
|
|
asp->client = osmo_stream_cli_create(asp);
|
|
if (!asp->client) {
|
|
LOGSS7(asp->inst, LOGL_ERROR, "Unable to create stream"
|
|
" client for ASP %s\n", asp->cfg.name);
|
|
return -1;
|
|
}
|
|
osmo_stream_cli_set_nodelay(asp->client, true);
|
|
osmo_stream_cli_set_addr(asp->client, asp->cfg.remote.host);
|
|
osmo_stream_cli_set_port(asp->client, asp->cfg.remote.port);
|
|
osmo_stream_cli_set_local_addr(asp->client, asp->cfg.local.host);
|
|
osmo_stream_cli_set_local_port(asp->client, asp->cfg.local.port);
|
|
osmo_stream_cli_set_proto(asp->client, asp_proto_to_ip_proto(asp->cfg.proto));
|
|
osmo_stream_cli_set_reconnect_timeout(asp->client, 5);
|
|
osmo_stream_cli_set_connect_cb(asp->client, xua_cli_connect_cb);
|
|
if (asp->cfg.proto == OSMO_SS7_ASP_PROT_IPA)
|
|
osmo_stream_cli_set_read_cb(asp->client, ipa_cli_read_cb);
|
|
else
|
|
osmo_stream_cli_set_read_cb(asp->client, xua_cli_read_cb);
|
|
osmo_stream_cli_set_data(asp->client, asp);
|
|
rc = osmo_stream_cli_open2(asp->client, 1);
|
|
if (rc < 0) {
|
|
LOGSS7(asp->inst, LOGL_ERROR, "Unable to open stream"
|
|
" client for ASP %s\n", asp->cfg.name);
|
|
/* we don't return error in here because osmo_stream_cli_open2()
|
|
will continue to retry to connect so the error is transient */
|
|
}
|
|
/* TODO: make this configurable and not implicit */
|
|
role = XUA_ASPFSM_ROLE_ASP;
|
|
} else {
|
|
/* We are in server mode now */
|
|
if (asp->client) {
|
|
/* if we previously were in client mode,
|
|
* destroy it */
|
|
osmo_stream_cli_destroy(asp->client);
|
|
asp->client = NULL;
|
|
}
|
|
/* FIXME: ensure we have a SCTP server */
|
|
LOGSS7(asp->inst, LOGL_NOTICE, "ASP Restart for server "
|
|
"not implemented yet!\n");
|
|
/* TODO: make this configurable and not implicit */
|
|
role = XUA_ASPFSM_ROLE_SG;
|
|
}
|
|
|
|
/* (re)start the ASP FSM */
|
|
if (asp->fi)
|
|
osmo_fsm_inst_term(asp->fi, OSMO_FSM_TERM_REQUEST, NULL);
|
|
asp->fi = xua_asp_fsm_start(asp, role, LOGL_DEBUG);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* libosmo-netif integration for SCTP stream server/client
|
|
***********************************************************************/
|
|
|
|
static const struct value_string sctp_assoc_chg_vals[] = {
|
|
{ SCTP_COMM_UP, "COMM_UP" },
|
|
{ SCTP_COMM_LOST, "COMM_LOST" },
|
|
{ SCTP_RESTART, "RESTART" },
|
|
{ SCTP_SHUTDOWN_COMP, "SHUTDOWN_COMP" },
|
|
{ SCTP_CANT_STR_ASSOC, "CANT_STR_ASSOC" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const struct value_string sctp_sn_type_vals[] = {
|
|
{ SCTP_ASSOC_CHANGE, "ASSOC_CHANGE" },
|
|
{ SCTP_PEER_ADDR_CHANGE, "PEER_ADDR_CHANGE" },
|
|
{ SCTP_SHUTDOWN_EVENT, "SHUTDOWN_EVENT" },
|
|
{ SCTP_SEND_FAILED, "SEND_FAILED" },
|
|
{ SCTP_REMOTE_ERROR, "REMOTE_ERROR" },
|
|
{ SCTP_PARTIAL_DELIVERY_EVENT, "PARTIAL_DELIVERY_EVENT" },
|
|
{ SCTP_ADAPTATION_INDICATION, "ADAPTATION_INDICATION" },
|
|
#ifdef SCTP_AUTHENTICATION_INDICATION
|
|
{ SCTP_AUTHENTICATION_INDICATION, "UTHENTICATION_INDICATION" },
|
|
#endif
|
|
#ifdef SCTP_SENDER_DRY_EVENT
|
|
{ SCTP_SENDER_DRY_EVENT, "SENDER_DRY_EVENT" },
|
|
#endif
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static int get_logevel_by_sn_type(int sn_type)
|
|
{
|
|
switch (sn_type) {
|
|
case SCTP_ADAPTATION_INDICATION:
|
|
case SCTP_PEER_ADDR_CHANGE:
|
|
#ifdef SCTP_AUTHENTICATION_INDICATION
|
|
case SCTP_AUTHENTICATION_INDICATION:
|
|
#endif
|
|
#ifdef SCTP_SENDER_DRY_EVENT
|
|
case SCTP_SENDER_DRY_EVENT:
|
|
#endif
|
|
return LOGL_INFO;
|
|
case SCTP_ASSOC_CHANGE:
|
|
return LOGL_NOTICE;
|
|
case SCTP_SHUTDOWN_EVENT:
|
|
case SCTP_PARTIAL_DELIVERY_EVENT:
|
|
return LOGL_NOTICE;
|
|
case SCTP_SEND_FAILED:
|
|
case SCTP_REMOTE_ERROR:
|
|
return LOGL_ERROR;
|
|
default:
|
|
return LOGL_NOTICE;
|
|
}
|
|
}
|
|
|
|
static void log_sctp_notification(struct osmo_ss7_asp *asp, const char *pfx,
|
|
union sctp_notification *notif)
|
|
{
|
|
int log_level;
|
|
|
|
LOGPASP(asp, DLSS7, LOGL_INFO, "%s SCTP NOTIFICATION %u flags=0x%0x\n",
|
|
pfx, notif->sn_header.sn_type,
|
|
notif->sn_header.sn_flags);
|
|
|
|
log_level = get_logevel_by_sn_type(notif->sn_header.sn_type);
|
|
|
|
switch (notif->sn_header.sn_type) {
|
|
case SCTP_ASSOC_CHANGE:
|
|
LOGPASP(asp, DLSS7, log_level, "%s SCTP_ASSOC_CHANGE: %s\n",
|
|
pfx, get_value_string(sctp_assoc_chg_vals,
|
|
notif->sn_assoc_change.sac_state));
|
|
break;
|
|
default:
|
|
LOGPASP(asp, DLSS7, log_level, "%s %s\n",
|
|
pfx, get_value_string(sctp_sn_type_vals,
|
|
notif->sn_header.sn_type));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* netif code tells us we can read something from the socket */
|
|
static int ipa_srv_conn_cb(struct osmo_stream_srv *conn)
|
|
{
|
|
struct osmo_fd *ofd = osmo_stream_srv_get_ofd(conn);
|
|
struct osmo_ss7_asp *asp = osmo_stream_srv_get_data(conn);
|
|
struct msgb *msg = NULL;
|
|
int rc;
|
|
|
|
/* read IPA message from socket and process it */
|
|
rc = ipa_msg_recv_buffered(ofd->fd, &msg, &asp->pending_msg);
|
|
LOGPASP(asp, DLSS7, LOGL_DEBUG, "%s(): ipa_msg_recv_buffered() returned %d\n",
|
|
__func__, rc);
|
|
if (rc <= 0) {
|
|
if (rc == -EAGAIN) {
|
|
/* more data needed */
|
|
return 0;
|
|
}
|
|
osmo_stream_srv_destroy(conn);
|
|
return rc;
|
|
}
|
|
if (osmo_ipa_process_msg(msg) < 0) {
|
|
LOGPASP(asp, DLSS7, LOGL_ERROR, "Bad IPA message\n");
|
|
osmo_stream_srv_destroy(conn);
|
|
msgb_free(msg);
|
|
return -1;
|
|
}
|
|
msg->dst = asp;
|
|
|
|
return ipa_rx_msg(asp, msg);
|
|
}
|
|
|
|
/* netif code tells us we can read something from the socket */
|
|
static int xua_srv_conn_cb(struct osmo_stream_srv *conn)
|
|
{
|
|
struct osmo_fd *ofd = osmo_stream_srv_get_ofd(conn);
|
|
struct osmo_ss7_asp *asp = osmo_stream_srv_get_data(conn);
|
|
struct msgb *msg = m3ua_msgb_alloc("xUA Server Rx");
|
|
struct sctp_sndrcvinfo sinfo;
|
|
unsigned int ppid;
|
|
int flags = 0;
|
|
int rc;
|
|
|
|
if (!msg)
|
|
return -ENOMEM;
|
|
|
|
/* read xUA message from socket and process it */
|
|
rc = sctp_recvmsg(ofd->fd, msgb_data(msg), msgb_tailroom(msg),
|
|
NULL, NULL, &sinfo, &flags);
|
|
LOGPASP(asp, DLSS7, LOGL_DEBUG, "%s(): sctp_recvmsg() returned %d (flags=0x%x)\n",
|
|
__func__, rc, flags);
|
|
if (rc < 0) {
|
|
osmo_stream_srv_destroy(conn);
|
|
rc = -EBADF;
|
|
goto out;
|
|
} else if (rc == 0) {
|
|
osmo_stream_srv_destroy(conn);
|
|
rc = -EBADF;
|
|
goto out;
|
|
} else {
|
|
msgb_put(msg, rc);
|
|
}
|
|
|
|
if (flags & MSG_NOTIFICATION) {
|
|
union sctp_notification *notif = (union sctp_notification *) msgb_data(msg);
|
|
|
|
log_sctp_notification(asp, "xUA SRV", notif);
|
|
|
|
switch (notif->sn_header.sn_type) {
|
|
case SCTP_SHUTDOWN_EVENT:
|
|
osmo_stream_srv_destroy(conn);
|
|
rc = -EBADF;
|
|
break;
|
|
case SCTP_ASSOC_CHANGE:
|
|
if (notif->sn_assoc_change.sac_state == SCTP_RESTART)
|
|
xua_asp_send_xlm_prim_simple(asp, OSMO_XLM_PRIM_M_SCTP_RESTART,
|
|
PRIM_OP_INDICATION);
|
|
rc = 0;
|
|
break;
|
|
default:
|
|
rc = 0;
|
|
break;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
ppid = ntohl(sinfo.sinfo_ppid);
|
|
msgb_sctp_ppid(msg) = ppid;
|
|
msgb_sctp_stream(msg) = sinfo.sinfo_stream;
|
|
msg->dst = asp;
|
|
|
|
if (ppid == SUA_PPID && asp->cfg.proto == OSMO_SS7_ASP_PROT_SUA)
|
|
rc = sua_rx_msg(asp, msg);
|
|
else if (ppid == M3UA_PPID && asp->cfg.proto == OSMO_SS7_ASP_PROT_M3UA)
|
|
rc = m3ua_rx_msg(asp, msg);
|
|
else
|
|
rc = ss7_asp_rx_unknown(asp, ppid, msg);
|
|
|
|
out:
|
|
msgb_free(msg);
|
|
return rc;
|
|
}
|
|
|
|
/* client has established SCTP connection to server */
|
|
static int xua_cli_connect_cb(struct osmo_stream_cli *cli)
|
|
{
|
|
struct osmo_fd *ofd = osmo_stream_cli_get_ofd(cli);
|
|
struct osmo_ss7_asp *asp = osmo_stream_cli_get_data(cli);
|
|
|
|
/* update the socket name */
|
|
if (asp->sock_name)
|
|
talloc_free(asp->sock_name);
|
|
asp->sock_name = osmo_sock_get_name(asp, ofd->fd);
|
|
|
|
LOGPASP(asp, DLSS7, LOGL_INFO, "Client connected %s\n", asp->sock_name);
|
|
|
|
if (asp->lm && asp->lm->prim_cb) {
|
|
/* Notify layer manager that a connection has been
|
|
* established */
|
|
xua_asp_send_xlm_prim_simple(asp, OSMO_XLM_PRIM_M_SCTP_ESTABLISH, PRIM_OP_INDICATION);
|
|
} else {
|
|
/* directly as the ASP FSM to start by sending an ASP-UP ... */
|
|
osmo_fsm_inst_dispatch(asp->fi, XUA_ASP_E_M_ASP_UP_REQ, NULL);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void xua_cli_close(struct osmo_stream_cli *cli)
|
|
{
|
|
struct osmo_ss7_asp *asp = osmo_stream_cli_get_data(cli);
|
|
|
|
osmo_stream_cli_close(cli);
|
|
osmo_fsm_inst_dispatch(asp->fi, XUA_ASP_E_SCTP_COMM_DOWN_IND, asp);
|
|
/* send M-SCTP_RELEASE.ind to XUA Layer Manager */
|
|
xua_asp_send_xlm_prim_simple(asp, OSMO_XLM_PRIM_M_SCTP_RELEASE, PRIM_OP_INDICATION);
|
|
}
|
|
|
|
static void xua_cli_close_and_reconnect(struct osmo_stream_cli *cli)
|
|
{
|
|
xua_cli_close(cli);
|
|
osmo_stream_cli_reconnect(cli);
|
|
}
|
|
|
|
/* read call-back for IPA/SCCPlite socket */
|
|
static int ipa_cli_read_cb(struct osmo_stream_cli *conn)
|
|
{
|
|
struct osmo_fd *ofd = osmo_stream_cli_get_ofd(conn);
|
|
struct osmo_ss7_asp *asp = osmo_stream_cli_get_data(conn);
|
|
struct msgb *msg = NULL;
|
|
int rc;
|
|
|
|
/* read IPA message from socket and process it */
|
|
rc = ipa_msg_recv_buffered(ofd->fd, &msg, &asp->pending_msg);
|
|
LOGPASP(asp, DLSS7, LOGL_DEBUG, "%s(): ipa_msg_recv_buffered() returned %d\n",
|
|
__func__, rc);
|
|
if (rc <= 0) {
|
|
if (rc == -EAGAIN) {
|
|
/* more data needed */
|
|
return 0;
|
|
}
|
|
xua_cli_close_and_reconnect(conn);
|
|
return rc;
|
|
}
|
|
if (osmo_ipa_process_msg(msg) < 0) {
|
|
LOGPASP(asp, DLSS7, LOGL_ERROR, "Bad IPA message\n");
|
|
xua_cli_close_and_reconnect(conn);
|
|
msgb_free(msg);
|
|
return -1;
|
|
}
|
|
msg->dst = asp;
|
|
return ipa_rx_msg(asp, msg);
|
|
}
|
|
|
|
static int xua_cli_read_cb(struct osmo_stream_cli *conn)
|
|
{
|
|
struct osmo_fd *ofd = osmo_stream_cli_get_ofd(conn);
|
|
struct osmo_ss7_asp *asp = osmo_stream_cli_get_data(conn);
|
|
struct msgb *msg = m3ua_msgb_alloc("xUA Client Rx");
|
|
struct sctp_sndrcvinfo sinfo;
|
|
unsigned int ppid;
|
|
int flags = 0;
|
|
int rc;
|
|
|
|
if (!msg)
|
|
return -ENOMEM;
|
|
|
|
/* read xUA message from socket and process it */
|
|
rc = sctp_recvmsg(ofd->fd, msgb_data(msg), msgb_tailroom(msg),
|
|
NULL, NULL, &sinfo, &flags);
|
|
LOGPASP(asp, DLSS7, LOGL_DEBUG, "%s(): sctp_recvmsg() returned %d (flags=0x%x)\n",
|
|
__func__, rc, flags);
|
|
if (rc < 0) {
|
|
xua_cli_close_and_reconnect(conn);
|
|
goto out;
|
|
} else if (rc == 0) {
|
|
xua_cli_close_and_reconnect(conn);
|
|
} else {
|
|
msgb_put(msg, rc);
|
|
}
|
|
|
|
if (flags & MSG_NOTIFICATION) {
|
|
union sctp_notification *notif = (union sctp_notification *) msgb_data(msg);
|
|
|
|
log_sctp_notification(asp, "xUA CLNT", notif);
|
|
|
|
switch (notif->sn_header.sn_type) {
|
|
case SCTP_SHUTDOWN_EVENT:
|
|
xua_cli_close_and_reconnect(conn);
|
|
break;
|
|
case SCTP_ASSOC_CHANGE:
|
|
if (notif->sn_assoc_change.sac_state == SCTP_RESTART)
|
|
xua_asp_send_xlm_prim_simple(asp, OSMO_XLM_PRIM_M_SCTP_RESTART,
|
|
PRIM_OP_INDICATION);
|
|
default:
|
|
break;
|
|
}
|
|
rc = 0;
|
|
goto out;
|
|
}
|
|
|
|
if (rc == 0)
|
|
goto out;
|
|
|
|
ppid = ntohl(sinfo.sinfo_ppid);
|
|
msgb_sctp_ppid(msg) = ppid;
|
|
msgb_sctp_stream(msg) = sinfo.sinfo_stream;
|
|
msg->dst = asp;
|
|
|
|
if (ppid == SUA_PPID && asp->cfg.proto == OSMO_SS7_ASP_PROT_SUA)
|
|
rc = sua_rx_msg(asp, msg);
|
|
else if (ppid == M3UA_PPID && asp->cfg.proto == OSMO_SS7_ASP_PROT_M3UA)
|
|
rc = m3ua_rx_msg(asp, msg);
|
|
else
|
|
rc = ss7_asp_rx_unknown(asp, ppid, msg);
|
|
|
|
out:
|
|
msgb_free(msg);
|
|
return rc;
|
|
}
|
|
|
|
static int xua_srv_conn_closed_cb(struct osmo_stream_srv *srv)
|
|
{
|
|
struct osmo_ss7_asp *asp = osmo_stream_srv_get_data(srv);
|
|
|
|
LOGP(DLSS7, LOGL_INFO, "%s: SCTP connection closed\n",
|
|
asp ? asp->cfg.name : "?");
|
|
|
|
if (!asp)
|
|
return 0;
|
|
|
|
/* notify ASP FSM and everyone else */
|
|
osmo_fsm_inst_dispatch(asp->fi, XUA_ASP_E_SCTP_COMM_DOWN_IND, NULL);
|
|
|
|
/* delete any RKM-dynamically allocated ASs for this ASP */
|
|
xua_rkm_cleanup_dyn_as_for_asp(asp);
|
|
|
|
/* send M-SCTP_RELEASE.ind to Layer Manager */
|
|
xua_asp_send_xlm_prim_simple(asp, OSMO_XLM_PRIM_M_SCTP_RELEASE, PRIM_OP_INDICATION);
|
|
|
|
/* if we were dynamically allocated at accept_cb() time, let's
|
|
* self-destruct now. A new connection will re-create the ASP. */
|
|
if (asp->dyn_allocated) {
|
|
/* avoid re-entrance via osmo_stream_srv_destroy() which
|
|
* called us */
|
|
asp->server = NULL;
|
|
osmo_ss7_asp_destroy(asp);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* server has accept()ed a new SCTP association, let's find the ASP for
|
|
* it (if any) */
|
|
static int xua_accept_cb(struct osmo_stream_srv_link *link, int fd)
|
|
{
|
|
struct osmo_xua_server *oxs = osmo_stream_srv_link_get_data(link);
|
|
struct osmo_stream_srv *srv;
|
|
struct osmo_ss7_asp *asp;
|
|
char *sock_name = osmo_sock_get_name(link, fd);
|
|
|
|
LOGP(DLSS7, LOGL_INFO, "%s: New %s connection accepted\n",
|
|
sock_name, get_value_string(osmo_ss7_asp_protocol_vals, oxs->cfg.proto));
|
|
|
|
if (oxs->cfg.proto == OSMO_SS7_ASP_PROT_IPA) {
|
|
srv = osmo_stream_srv_create(oxs, link, fd,
|
|
ipa_srv_conn_cb,
|
|
xua_srv_conn_closed_cb, NULL);
|
|
} else {
|
|
srv = osmo_stream_srv_create(oxs, link, fd,
|
|
xua_srv_conn_cb,
|
|
xua_srv_conn_closed_cb, NULL);
|
|
}
|
|
if (!srv) {
|
|
LOGP(DLSS7, LOGL_ERROR, "%s: Unable to create stream server "
|
|
"for connection\n", sock_name);
|
|
close(fd);
|
|
talloc_free(sock_name);
|
|
return -1;
|
|
}
|
|
|
|
asp = osmo_ss7_asp_find_by_socket_addr(fd);
|
|
if (asp) {
|
|
LOGP(DLSS7, LOGL_INFO, "%s: matched connection to ASP %s\n",
|
|
sock_name, asp->cfg.name);
|
|
} else {
|
|
if (!oxs->cfg.accept_dyn_reg) {
|
|
LOGP(DLSS7, LOGL_NOTICE, "%s: SCTP connection without matching "
|
|
"ASP definition and no dynamic registration enabled, terminating\n",
|
|
sock_name);
|
|
} else {
|
|
char namebuf[32];
|
|
static uint32_t dyn_asp_num = 0;
|
|
snprintf(namebuf, sizeof(namebuf), "asp-dyn-%u", dyn_asp_num++);
|
|
asp = osmo_ss7_asp_find_or_create(oxs->inst, namebuf, 0, 0,
|
|
oxs->cfg.proto);
|
|
if (asp) {
|
|
LOGP(DLSS7, LOGL_INFO, "%s: created dynamicASP %s\n",
|
|
sock_name, asp->cfg.name);
|
|
asp->cfg.is_server = true;
|
|
asp->dyn_allocated = true;
|
|
asp->server = srv;
|
|
osmo_ss7_asp_restart(asp);
|
|
}
|
|
}
|
|
if (!asp) {
|
|
osmo_stream_srv_destroy(srv);
|
|
talloc_free(sock_name);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* update the ASP reference back to the server over which the
|
|
* connection came in */
|
|
asp->server = srv;
|
|
asp->xua_server = oxs;
|
|
llist_add_tail(&asp->siblings, &oxs->asp_list);
|
|
/* update the ASP socket name */
|
|
if (asp->sock_name)
|
|
talloc_free(asp->sock_name);
|
|
asp->sock_name = talloc_reparent(link, asp, sock_name);
|
|
/* make sure the conn_cb() is called with the asp as private
|
|
* data */
|
|
osmo_stream_srv_set_data(srv, asp);
|
|
|
|
/* send M-SCTP_ESTABLISH.ind to Layer Manager */
|
|
osmo_fsm_inst_dispatch(asp->fi, XUA_ASP_E_SCTP_EST_IND, 0);
|
|
xua_asp_send_xlm_prim_simple(asp, OSMO_XLM_PRIM_M_SCTP_ESTABLISH, PRIM_OP_INDICATION);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! \brief send a fully encoded msgb via a given ASP
|
|
* \param[in] asp Application Server Process through which to send
|
|
* \param[in] msg message buffer to transmit. Ownership transferred.
|
|
* \returns 0 on success; negative in case of error */
|
|
int osmo_ss7_asp_send(struct osmo_ss7_asp *asp, struct msgb *msg)
|
|
{
|
|
OSMO_ASSERT(ss7_initialized);
|
|
|
|
switch (asp->cfg.proto) {
|
|
case OSMO_SS7_ASP_PROT_SUA:
|
|
msgb_sctp_ppid(msg) = SUA_PPID;
|
|
break;
|
|
case OSMO_SS7_ASP_PROT_M3UA:
|
|
msgb_sctp_ppid(msg) = M3UA_PPID;
|
|
break;
|
|
case OSMO_SS7_ASP_PROT_IPA:
|
|
break;
|
|
default:
|
|
OSMO_ASSERT(0);
|
|
}
|
|
|
|
if (asp->cfg.is_server) {
|
|
if (!asp->server) {
|
|
LOGPASP(asp, DLSS7, LOGL_ERROR, "Cannot transmit, no asp->server\n");
|
|
/* FIXME: what to do here? delete the route? send DUNA? */
|
|
msgb_free(msg);
|
|
return -EIO;
|
|
}
|
|
osmo_stream_srv_send(asp->server, msg);
|
|
} else {
|
|
if (!asp->client) {
|
|
LOGPASP(asp, DLSS7, LOGL_ERROR, "Cannot transmit, no asp->client\n");
|
|
/* FIXME: what to do here? delete the route? send DUNA? */
|
|
msgb_free(msg);
|
|
return -EIO;
|
|
}
|
|
osmo_stream_cli_send(asp->client, msg);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void osmo_ss7_asp_disconnect(struct osmo_ss7_asp *asp)
|
|
{
|
|
if (asp->server)
|
|
osmo_stream_srv_destroy(asp->server);
|
|
/* the close_cb() will handle the remaining cleanup here */
|
|
else if (asp->client)
|
|
xua_cli_close_and_reconnect(asp->client);
|
|
}
|
|
|
|
/***********************************************************************
|
|
* SS7 xUA Server
|
|
***********************************************************************/
|
|
|
|
struct osmo_xua_server *
|
|
osmo_ss7_xua_server_find(struct osmo_ss7_instance *inst, enum osmo_ss7_asp_protocol proto,
|
|
uint16_t local_port)
|
|
{
|
|
struct osmo_xua_server *xs;
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
llist_for_each_entry(xs, &inst->xua_servers, list) {
|
|
if (proto == xs->cfg.proto &&
|
|
local_port == xs->cfg.local.port)
|
|
return xs;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*! \brief create a new xUA server configured with given ip/port
|
|
* \param[in] ctx talloc allocation context
|
|
* \param[in] proto protocol (xUA variant) to use
|
|
* \param[in] local_port local SCTP port to bind/listen to
|
|
* \param[in] local_host local IP address to bind/listen to (optional)
|
|
* \returns callee-allocated \ref osmo_xua_server in case of success
|
|
*/
|
|
struct osmo_xua_server *
|
|
osmo_ss7_xua_server_create(struct osmo_ss7_instance *inst, enum osmo_ss7_asp_protocol proto,
|
|
uint16_t local_port, const char *local_host)
|
|
{
|
|
struct osmo_xua_server *oxs = talloc_zero(inst, struct osmo_xua_server);
|
|
|
|
OSMO_ASSERT(ss7_initialized);
|
|
if (!oxs)
|
|
return NULL;
|
|
|
|
LOGP(DLSS7, LOGL_INFO, "Creating %s Server %s:%u\n",
|
|
get_value_string(osmo_ss7_asp_protocol_vals, proto), local_host, local_port);
|
|
|
|
INIT_LLIST_HEAD(&oxs->asp_list);
|
|
|
|
oxs->cfg.proto = proto;
|
|
oxs->cfg.local.port = local_port;
|
|
oxs->cfg.local.host = talloc_strdup(oxs, local_host);
|
|
|
|
oxs->server = osmo_stream_srv_link_create(oxs);
|
|
osmo_stream_srv_link_set_data(oxs->server, oxs);
|
|
osmo_stream_srv_link_set_accept_cb(oxs->server, xua_accept_cb);
|
|
|
|
osmo_stream_srv_link_set_nodelay(oxs->server, true);
|
|
osmo_stream_srv_link_set_addr(oxs->server, oxs->cfg.local.host);
|
|
osmo_stream_srv_link_set_port(oxs->server, oxs->cfg.local.port);
|
|
osmo_stream_srv_link_set_proto(oxs->server, asp_proto_to_ip_proto(proto));
|
|
|
|
LOGP(DLSS7, LOGL_INFO, "Created %s server on %s:%" PRIu16 "\n",
|
|
get_value_string(osmo_ss7_asp_protocol_vals, proto), local_host, local_port);
|
|
|
|
oxs->inst = inst;
|
|
llist_add_tail(&oxs->list, &inst->xua_servers);
|
|
|
|
/* The SUA code internally needs SCCP to work */
|
|
if (proto == OSMO_SS7_ASP_PROT_SUA)
|
|
osmo_ss7_ensure_sccp(inst);
|
|
|
|
return oxs;
|
|
}
|
|
|
|
/*! \brief Set the xUA server to bind/listen to the currently configured ip/port
|
|
* \param[in] xs xUA server to operate
|
|
* \returns 0 on success, negative value on error.
|
|
*/
|
|
int
|
|
osmo_ss7_xua_server_bind(struct osmo_xua_server *xs)
|
|
{
|
|
LOGP(DLSS7, LOGL_INFO, "(Re)binding %s Server to %s:%u\n",
|
|
get_value_string(osmo_ss7_asp_protocol_vals, xs->cfg.proto),
|
|
xs->cfg.local.host, xs->cfg.local.port);
|
|
return osmo_stream_srv_link_open(xs->server);
|
|
}
|
|
|
|
int
|
|
osmo_ss7_xua_server_set_local_host(struct osmo_xua_server *xs, const char *local_host)
|
|
{
|
|
OSMO_ASSERT(ss7_initialized);
|
|
osmo_talloc_replace_string(xs, &xs->cfg.local.host, local_host);
|
|
|
|
osmo_stream_srv_link_set_addr(xs->server, xs->cfg.local.host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void osmo_ss7_xua_server_destroy(struct osmo_xua_server *xs)
|
|
{
|
|
struct osmo_ss7_asp *asp, *asp2;
|
|
|
|
if (xs->server) {
|
|
osmo_stream_srv_link_close(xs->server);
|
|
osmo_stream_srv_link_destroy(xs->server);
|
|
}
|
|
/* iterate and close all connections established in relation
|
|
* with this server */
|
|
llist_for_each_entry_safe(asp, asp2, &xs->asp_list, siblings)
|
|
osmo_ss7_asp_destroy(asp);
|
|
|
|
llist_del(&xs->list);
|
|
talloc_free(xs);
|
|
}
|
|
|
|
bool osmo_ss7_pc_is_local(struct osmo_ss7_instance *inst, uint32_t pc)
|
|
{
|
|
OSMO_ASSERT(ss7_initialized);
|
|
if (osmo_ss7_pc_is_valid(inst->cfg.primary_pc) && pc == inst->cfg.primary_pc)
|
|
return true;
|
|
/* FIXME: Secondary and Capability Point Codes */
|
|
return false;
|
|
}
|
|
|
|
int osmo_ss7_init(void)
|
|
{
|
|
if (ss7_initialized)
|
|
return 1;
|
|
osmo_fsm_register(&sccp_scoc_fsm);
|
|
osmo_fsm_register(&xua_as_fsm);
|
|
osmo_fsm_register(&xua_asp_fsm);
|
|
osmo_fsm_register(&ipa_asp_fsm);
|
|
osmo_fsm_register(&xua_default_lm_fsm);
|
|
ss7_initialized = true;
|
|
return 0;
|
|
}
|
|
|
|
int osmo_ss7_tmode_to_xua(enum osmo_ss7_as_traffic_mode tmod)
|
|
{
|
|
switch (tmod) {
|
|
case OSMO_SS7_AS_TMOD_OVERRIDE:
|
|
return M3UA_TMOD_OVERRIDE;
|
|
case OSMO_SS7_AS_TMOD_LOADSHARE:
|
|
return M3UA_TMOD_LOADSHARE;
|
|
case OSMO_SS7_AS_TMOD_BCAST:
|
|
return M3UA_TMOD_BCAST;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
enum osmo_ss7_as_traffic_mode osmo_ss7_tmode_from_xua(uint32_t in)
|
|
{
|
|
switch (in) {
|
|
case M3UA_TMOD_OVERRIDE:
|
|
default:
|
|
return OSMO_SS7_AS_TMOD_OVERRIDE;
|
|
case M3UA_TMOD_LOADSHARE:
|
|
return OSMO_SS7_AS_TMOD_LOADSHARE;
|
|
case M3UA_TMOD_BCAST:
|
|
return OSMO_SS7_AS_TMOD_BCAST;
|
|
}
|
|
}
|
|
|
|
static osmo_ss7_asp_rx_unknown_cb *g_osmo_ss7_asp_rx_unknown_cb;
|
|
|
|
int ss7_asp_rx_unknown(struct osmo_ss7_asp *asp, int ppid_mux, struct msgb *msg)
|
|
{
|
|
if (g_osmo_ss7_asp_rx_unknown_cb)
|
|
return (*g_osmo_ss7_asp_rx_unknown_cb)(asp, ppid_mux, msg);
|
|
|
|
switch(asp->cfg.proto) {
|
|
case OSMO_SS7_ASP_PROT_IPA:
|
|
LOGPASP(asp, DLSS7, LOGL_NOTICE, "Rx IPA for unknown Stream ID 0x%02x: %s\n",
|
|
ppid_mux, msgb_hexdump(msg));
|
|
break;
|
|
default:
|
|
LOGPASP(asp, DLSS7, LOGL_NOTICE, "Rx SCTP chunk for unknown PPID %u: %s\n",
|
|
ppid_mux, msgb_hexdump(msg));
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*! Register a call-back function for unknown SCTP PPID / IPA Stream ID */
|
|
void osmo_ss7_register_rx_unknown_cb(osmo_ss7_asp_rx_unknown_cb *cb)
|
|
{
|
|
g_osmo_ss7_asp_rx_unknown_cb = cb;
|
|
}
|