412 lines
11 KiB
C
412 lines
11 KiB
C
/*
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* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
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*
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* This file is part of Open5GS.
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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 Affero General Public License as published by
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* the Free Software Foundation, either version 3 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 <https://www.gnu.org/licenses/>.
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*/
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#include "ogs-sctp.h"
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#undef OGS_LOG_DOMAIN
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#define OGS_LOG_DOMAIN __ogs_sock_domain
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static int subscribe_to_events(ogs_sock_t *sock);
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static int set_paddrparams(ogs_sock_t *sock, ogs_sockopt_t *option);
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static int set_rtoinfo(ogs_sock_t *sock, ogs_sockopt_t *option);
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static int set_initmsg(ogs_sock_t *sock, ogs_sockopt_t *option);
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static int set_nodelay(ogs_sock_t *sock, int on);
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void ogs_sctp_init(uint16_t port)
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{
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}
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void ogs_sctp_final(void)
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{
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}
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ogs_sock_t *ogs_sctp_socket(int family, int type, ogs_socknode_t *node)
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{
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ogs_sock_t *new = NULL;
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int rv;
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ogs_sockopt_t option = {
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.sctp.heartbit_interval = 5000, /* 5 seconds */
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.sctp.rto_initial = 3000, /* 3 seconds */
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.sctp.rto_min = 1000, /* 1 seconds */
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.sctp.rto_max = 5000, /* 5 seconds */
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.sctp.max_num_of_ostreams = DEFAULT_SCTP_MAX_NUM_OF_OSTREAMS,
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.sctp.max_num_of_istreams = 65535,
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.sctp.max_attempts = 4,
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.sctp.max_initial_timeout = 8000, /* 8 seconds */
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};
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ogs_sctp_set_option(&option, node);
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new = ogs_sock_socket(family, type, IPPROTO_SCTP);
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ogs_assert(new);
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rv = subscribe_to_events(new);
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ogs_assert(rv == OGS_OK);
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rv = set_paddrparams(new, &option);
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ogs_assert(rv == OGS_OK);
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rv = set_rtoinfo(new, &option);
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ogs_assert(rv == OGS_OK);
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rv = set_initmsg(new, &option);
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ogs_assert(rv == OGS_OK);
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if (node) {
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if (node->option.nodelay) {
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rv = set_nodelay(new, node->option.nodelay);
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ogs_assert(rv == OGS_OK);
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}
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}
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return new;
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}
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ogs_sock_t *ogs_sctp_server(int type, ogs_socknode_t *node)
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{
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int rv;
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ogs_sock_t *new;
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ogs_sockaddr_t *addr;
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char buf[OGS_ADDRSTRLEN];
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ogs_assert(node);
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ogs_assert(node->addr);
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addr = node->addr;
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while (addr) {
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new = ogs_sctp_socket(addr->ogs_sa_family, type, node);
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if (new) {
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rv = ogs_listen_reusable(new->fd);
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ogs_assert(rv == OGS_OK);
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if (ogs_sock_bind(new, addr) == OGS_OK) {
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ogs_debug("sctp_server() [%s]:%d",
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OGS_ADDR(addr, buf), OGS_PORT(addr));
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break;
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}
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ogs_sock_destroy(new);
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}
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addr = addr->next;
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}
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if (addr == NULL) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"sctp_server() [%s]:%d failed",
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OGS_ADDR(node->addr, buf), OGS_PORT(node->addr));
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return NULL;
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}
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rv = ogs_sock_listen(new);
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ogs_assert(rv == OGS_OK);
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node->sock = new;
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ogs_socknode_install_poll(node);
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return new;
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}
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ogs_sock_t *ogs_sctp_client(int type, ogs_socknode_t *node)
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{
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ogs_sock_t *new = NULL;
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ogs_sockaddr_t *addr;
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char buf[OGS_ADDRSTRLEN];
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ogs_assert(node);
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ogs_assert(node->addr);
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addr = node->addr;
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while (addr) {
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new = ogs_sctp_socket(addr->ogs_sa_family, type, node);
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if (new) {
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if (ogs_sock_connect(new, addr) == OGS_OK) {
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ogs_debug("sctp_client() [%s]:%d",
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OGS_ADDR(addr, buf), OGS_PORT(addr));
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break;
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}
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ogs_sock_destroy(new);
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}
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addr = addr->next;
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}
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if (addr == NULL) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"sctp_client() [%s]:%d failed",
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OGS_ADDR(node->addr, buf), OGS_PORT(node->addr));
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return NULL;
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}
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node->sock = new;
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ogs_socknode_install_poll(node);
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return new;
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}
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int ogs_sctp_connect(ogs_sock_t *sock, ogs_sockaddr_t *sa_list)
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{
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ogs_sockaddr_t *addr;
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char buf[OGS_ADDRSTRLEN];
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ogs_assert(sock);
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addr = sa_list;
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while (addr) {
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if (ogs_sock_connect(sock, addr) == OGS_OK) {
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ogs_debug("sctp_connect() [%s]:%d",
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OGS_ADDR(addr, buf), OGS_PORT(addr));
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break;
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}
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addr = addr->next;
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}
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if (addr == NULL) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"sctp_connect() [%s]:%d failed",
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OGS_ADDR(sa_list, buf), OGS_PORT(sa_list));
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return OGS_ERROR;
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}
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return OGS_OK;
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}
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int ogs_sctp_sendmsg(ogs_sock_t *sock, const void *msg, size_t len,
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ogs_sockaddr_t *to, uint32_t ppid, uint16_t stream_no)
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{
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int size;
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socklen_t addrlen = 0;
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ogs_assert(sock);
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if (to)
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addrlen = ogs_sockaddr_len(to);
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size = sctp_sendmsg(sock->fd, msg, len,
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to ? &to->sa : NULL, addrlen,
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htonl(ppid),
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0, /* flags */
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stream_no,
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0, /* timetolive */
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0); /* context */
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if (size < 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"sctp_sendmsg(len:%d) failed", (int)len);
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}
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return size;
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}
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int ogs_sctp_recvmsg(ogs_sock_t *sock, void *msg, size_t len,
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ogs_sockaddr_t *from, ogs_sctp_info_t *sinfo, int *msg_flags)
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{
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int size;
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socklen_t addrlen = sizeof(struct sockaddr_storage);
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int flags = 0;
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struct sctp_sndrcvinfo sndrcvinfo;
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ogs_assert(sock);
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size = sctp_recvmsg(sock->fd, msg, len,
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from ? &from->sa : NULL, from ? &addrlen : NULL,
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&sndrcvinfo, &flags);
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if (size < 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"sctp_recvmsg(%d) failed", size);
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return size;
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}
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if (msg_flags) {
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*msg_flags = flags;
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}
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if (sinfo) {
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sinfo->ppid = ntohl(sndrcvinfo.sinfo_ppid);
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sinfo->stream_no = sndrcvinfo.sinfo_stream;
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}
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return size;
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}
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static int subscribe_to_events(ogs_sock_t *sock)
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{
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struct sctp_event_subscribe event;
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ogs_assert(sock);
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memset(&event, 0, sizeof(event));
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event.sctp_data_io_event = 1;
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event.sctp_association_event = 1;
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event.sctp_send_failure_event = 1;
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event.sctp_shutdown_event = 1;
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if (setsockopt(sock->fd, IPPROTO_SCTP, SCTP_EVENTS,
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&event, sizeof(event)) != 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"Unable to subscribe to SCTP events");
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return OGS_ERROR;
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}
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return OGS_OK;
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}
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static int set_paddrparams(ogs_sock_t *sock, ogs_sockopt_t *option)
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{
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struct sctp_paddrparams heartbeat;
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socklen_t socklen;
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ogs_assert(sock);
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ogs_assert(option);
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memset(&heartbeat, 0, sizeof(heartbeat));
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socklen = sizeof(heartbeat);
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if (getsockopt(sock->fd, IPPROTO_SCTP, SCTP_PEER_ADDR_PARAMS,
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&heartbeat, &socklen) != 0 ) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"getsockopt for SCTP_PEER_ADDR failed");
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return OGS_ERROR;
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}
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ogs_trace("OLD spp_flags = 0x%x hbinter = %d pathmax = %d",
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heartbeat.spp_flags,
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heartbeat.spp_hbinterval,
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heartbeat.spp_pathmaxrxt);
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heartbeat.spp_hbinterval = option->sctp.heartbit_interval;
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if (setsockopt(sock->fd, IPPROTO_SCTP, SCTP_PEER_ADDR_PARAMS,
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&heartbeat, sizeof( heartbeat)) != 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"setsockopt for SCTP_PEER_ADDR_PARAMS failed");
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return OGS_ERROR;
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}
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ogs_trace("NEW spp_flags = 0x%x hbinter = %d pathmax = %d",
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heartbeat.spp_flags,
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heartbeat.spp_hbinterval,
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heartbeat.spp_pathmaxrxt);
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return OGS_OK;
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}
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static int set_rtoinfo(ogs_sock_t *sock, ogs_sockopt_t *option)
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{
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struct sctp_rtoinfo rtoinfo;
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socklen_t socklen;
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ogs_assert(sock);
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ogs_assert(option);
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memset(&rtoinfo, 0, sizeof(rtoinfo));
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socklen = sizeof(rtoinfo);
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if (getsockopt(sock->fd, IPPROTO_SCTP, SCTP_RTOINFO,
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&rtoinfo, &socklen) != 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"getsockopt for SCTP_RTOINFO failed");
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return OGS_ERROR;
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}
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ogs_trace("OLD RTO (initial:%d max:%d min:%d)",
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rtoinfo.srto_initial,
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rtoinfo.srto_max,
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rtoinfo.srto_min);
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rtoinfo.srto_initial = option->sctp.rto_initial;
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rtoinfo.srto_min = option->sctp.rto_min;
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rtoinfo.srto_max = option->sctp.rto_max;
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if (setsockopt(sock->fd, IPPROTO_SCTP, SCTP_RTOINFO,
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&rtoinfo, sizeof(rtoinfo)) != 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"setsockopt for SCTP_RTOINFO failed");
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return OGS_ERROR;
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}
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ogs_trace("New RTO (initial:%d max:%d min:%d)",
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rtoinfo.srto_initial,
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rtoinfo.srto_max,
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rtoinfo.srto_min);
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return OGS_OK;
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}
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static int set_initmsg(ogs_sock_t *sock, ogs_sockopt_t *option)
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{
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struct sctp_initmsg initmsg;
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socklen_t socklen;
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ogs_assert(sock);
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ogs_assert(option);
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ogs_assert(option->sctp.max_num_of_ostreams > 1);
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memset(&initmsg, 0, sizeof(initmsg));
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socklen = sizeof(initmsg);
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if (getsockopt(sock->fd, IPPROTO_SCTP, SCTP_INITMSG,
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&initmsg, &socklen) != 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"getsockopt for SCTP_INITMSG failed");
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return OGS_ERROR;
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}
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ogs_trace("Old INITMSG (numout:%d maxin:%d maxattempt:%d maxinit_to:%d)",
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initmsg.sinit_num_ostreams,
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initmsg.sinit_max_instreams,
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initmsg.sinit_max_attempts,
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initmsg.sinit_max_init_timeo);
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initmsg.sinit_num_ostreams = option->sctp.max_num_of_ostreams;
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initmsg.sinit_max_instreams = option->sctp.max_num_of_istreams;
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initmsg.sinit_max_attempts = option->sctp.max_attempts;
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initmsg.sinit_max_init_timeo = option->sctp.max_initial_timeout;
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if (setsockopt(sock->fd, IPPROTO_SCTP, SCTP_INITMSG,
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&initmsg, sizeof(initmsg)) != 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"setsockopt for SCTP_INITMSG failed");
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return OGS_ERROR;
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}
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ogs_trace("New INITMSG (numout:%d maxin:%d maxattempt:%d maxinit_to:%d)",
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initmsg.sinit_num_ostreams,
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initmsg.sinit_max_instreams,
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initmsg.sinit_max_attempts,
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initmsg.sinit_max_init_timeo);
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return OGS_OK;
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}
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static int set_nodelay(ogs_sock_t *sock, int on)
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{
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ogs_assert(sock);
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ogs_trace("Turn on SCTP_NODELAY");
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if (setsockopt(sock->fd, IPPROTO_SCTP, SCTP_NODELAY,
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&on, sizeof(on)) != 0) {
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ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
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"setsockopt for SCTP_NODELAY failed");
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return OGS_ERROR;
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}
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return OGS_OK;
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}
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