| /** @file |
| * @brief Network context API |
| * |
| * An API for applications to define a network connection. |
| */ |
| |
| /* |
| * Copyright (c) 2016 Intel Corporation |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #if defined(CONFIG_NET_DEBUG_CONTEXT) |
| #define SYS_LOG_DOMAIN "net/ctx" |
| #define NET_LOG_ENABLED 1 |
| #endif |
| |
| #include <kernel.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <stdbool.h> |
| |
| #include <net/net_pkt.h> |
| #include <net/net_ip.h> |
| #include <net/net_context.h> |
| #include <net/net_offload.h> |
| #include <net/tcp.h> |
| |
| #include "connection.h" |
| #include "net_private.h" |
| |
| #include "ipv6.h" |
| #include "ipv4.h" |
| #include "udp_internal.h" |
| #include "tcp_internal.h" |
| #include "net_stats.h" |
| |
| #ifndef EPFNOSUPPORT |
| /* Some old versions of newlib haven't got this defined in errno.h, |
| * Just use EPROTONOSUPPORT in this case |
| */ |
| #define EPFNOSUPPORT EPROTONOSUPPORT |
| #endif |
| |
| #define NET_MAX_CONTEXT CONFIG_NET_MAX_CONTEXTS |
| |
| static struct net_context contexts[NET_MAX_CONTEXT]; |
| |
| /* We need to lock the contexts array as these APIs are typically called |
| * from applications which are usually run in task context. |
| */ |
| static struct k_sem contexts_lock; |
| |
| static int check_used_port(enum net_ip_protocol ip_proto, |
| u16_t local_port, |
| const struct sockaddr *local_addr) |
| |
| { |
| int i; |
| |
| for (i = 0; i < NET_MAX_CONTEXT; i++) { |
| if (!net_context_is_used(&contexts[i])) { |
| continue; |
| } |
| |
| if (!(net_context_get_ip_proto(&contexts[i]) == ip_proto && |
| net_sin((struct sockaddr *)& |
| contexts[i].local)->sin_port == local_port)) { |
| continue; |
| } |
| |
| if (local_addr->sa_family == AF_INET6) { |
| if (net_ipv6_addr_cmp( |
| net_sin6_ptr(&contexts[i].local)-> |
| sin6_addr, |
| &((struct sockaddr_in6 *) |
| local_addr)->sin6_addr)) { |
| return -EEXIST; |
| } |
| } else { |
| if (net_ipv4_addr_cmp( |
| net_sin_ptr(&contexts[i].local)-> |
| sin_addr, |
| &((struct sockaddr_in *) |
| local_addr)->sin_addr)) { |
| return -EEXIST; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static u16_t find_available_port(struct net_context *context, |
| const struct sockaddr *addr) |
| { |
| u16_t local_port; |
| |
| do { |
| local_port = sys_rand32_get() | 0x8000; |
| if (local_port <= 1023) { |
| /* 0 - 1023 ports are reserved */ |
| continue; |
| } |
| } while (check_used_port( |
| net_context_get_ip_proto(context), |
| htons(local_port), addr) == -EEXIST); |
| |
| return htons(local_port); |
| } |
| |
| int net_context_get(sa_family_t family, |
| enum net_sock_type type, |
| enum net_ip_protocol ip_proto, |
| struct net_context **context) |
| { |
| int i, ret = -ENOENT; |
| |
| #if defined(CONFIG_NET_CONTEXT_CHECK) |
| |
| #if !defined(CONFIG_NET_IPV4) |
| if (family == AF_INET) { |
| NET_ASSERT_INFO(family != AF_INET, "IPv4 disabled"); |
| return -EPFNOSUPPORT; |
| } |
| #endif |
| |
| #if !defined(CONFIG_NET_IPV6) |
| if (family == AF_INET6) { |
| NET_ASSERT_INFO(family != AF_INET6, "IPv6 disabled"); |
| return -EPFNOSUPPORT; |
| } |
| #endif |
| |
| #if !defined(CONFIG_NET_UDP) |
| if (type == SOCK_DGRAM) { |
| NET_ASSERT_INFO(type != SOCK_DGRAM, |
| "Datagram context disabled"); |
| return -EPROTOTYPE; |
| } |
| |
| if (ip_proto == IPPROTO_UDP) { |
| NET_ASSERT_INFO(ip_proto != IPPROTO_UDP, "UDP disabled"); |
| return -EPROTONOSUPPORT; |
| } |
| #endif |
| |
| #if !defined(CONFIG_NET_TCP) |
| if (type == SOCK_STREAM) { |
| NET_ASSERT_INFO(type != SOCK_STREAM, |
| "Stream context disabled"); |
| return -EPROTOTYPE; |
| } |
| |
| if (ip_proto == IPPROTO_TCP) { |
| NET_ASSERT_INFO(ip_proto != IPPROTO_TCP, "TCP disabled"); |
| return -EPROTONOSUPPORT; |
| } |
| #endif |
| |
| if (family != AF_INET && family != AF_INET6) { |
| NET_ASSERT_INFO(family == AF_INET || family == AF_INET6, |
| "Unknown address family %d", family); |
| return -EAFNOSUPPORT; |
| } |
| |
| if (type != SOCK_DGRAM && type != SOCK_STREAM) { |
| NET_ASSERT_INFO(type == SOCK_DGRAM || type == SOCK_STREAM, |
| "Unknown context type"); |
| return -EPROTOTYPE; |
| } |
| |
| if (ip_proto != IPPROTO_UDP && ip_proto != IPPROTO_TCP) { |
| NET_ASSERT_INFO(ip_proto == IPPROTO_UDP || |
| ip_proto == IPPROTO_TCP, |
| "Unknown IP protocol %d", ip_proto); |
| return -EPROTONOSUPPORT; |
| } |
| |
| if ((type == SOCK_STREAM && ip_proto == IPPROTO_UDP) || |
| (type == SOCK_DGRAM && ip_proto == IPPROTO_TCP)) { |
| NET_ASSERT_INFO(\ |
| (type != SOCK_STREAM || ip_proto != IPPROTO_UDP) && |
| (type != SOCK_DGRAM || ip_proto != IPPROTO_TCP), |
| "Context type and protocol mismatch, type %d proto %d", |
| type, ip_proto); |
| return -EOPNOTSUPP; |
| } |
| |
| if (!context) { |
| NET_ASSERT_INFO(context, "Invalid context"); |
| return -EINVAL; |
| } |
| #endif /* CONFIG_NET_CONTEXT_CHECK */ |
| |
| k_sem_take(&contexts_lock, K_FOREVER); |
| |
| for (i = 0; i < NET_MAX_CONTEXT; i++) { |
| if (net_context_is_used(&contexts[i])) { |
| continue; |
| } |
| |
| if (ip_proto == IPPROTO_TCP) { |
| if (net_tcp_get(&contexts[i]) < 0) { |
| break; |
| } |
| } |
| |
| contexts[i].iface = 0; |
| contexts[i].flags = 0; |
| atomic_set(&contexts[i].refcount, 1); |
| |
| net_context_set_family(&contexts[i], family); |
| net_context_set_type(&contexts[i], type); |
| net_context_set_ip_proto(&contexts[i], ip_proto); |
| |
| memset(&contexts[i].remote, 0, sizeof(struct sockaddr)); |
| memset(&contexts[i].local, 0, sizeof(struct sockaddr_ptr)); |
| |
| #if defined(CONFIG_NET_IPV6) |
| if (family == AF_INET6) { |
| struct sockaddr_in6 *addr6 = (struct sockaddr_in6 |
| *)&contexts[i].local; |
| addr6->sin6_port = find_available_port(&contexts[i], |
| (struct sockaddr *)addr6); |
| |
| if (!addr6->sin6_port) { |
| ret = -EADDRINUSE; |
| break; |
| } |
| } |
| #endif |
| |
| #if defined(CONFIG_NET_IPV4) |
| if (family == AF_INET) { |
| struct sockaddr_in *addr = (struct sockaddr_in |
| *)&contexts[i].local; |
| addr->sin_port = find_available_port(&contexts[i], |
| (struct sockaddr *)addr); |
| |
| if (!addr->sin_port) { |
| ret = -EADDRINUSE; |
| break; |
| } |
| } |
| #endif |
| |
| #if defined(CONFIG_NET_CONTEXT_SYNC_RECV) |
| k_sem_init(&contexts[i].recv_data_wait, 1, UINT_MAX); |
| #endif /* CONFIG_NET_CONTEXT_SYNC_RECV */ |
| |
| contexts[i].flags |= NET_CONTEXT_IN_USE; |
| *context = &contexts[i]; |
| |
| ret = 0; |
| break; |
| } |
| |
| k_sem_give(&contexts_lock); |
| |
| #if defined(CONFIG_NET_OFFLOAD) |
| /* FIXME - Figure out a way to get the correct network interface |
| * as it is not known at this point yet. |
| */ |
| if (!ret && net_if_is_ip_offloaded(net_if_get_default())) { |
| ret = net_offload_get(net_if_get_default(), |
| family, |
| type, |
| ip_proto, |
| context); |
| if (ret < 0) { |
| (*context)->flags &= ~NET_CONTEXT_IN_USE; |
| *context = NULL; |
| } |
| |
| return ret; |
| } |
| #endif /* CONFIG_NET_OFFLOAD */ |
| |
| return ret; |
| } |
| |
| int net_context_ref(struct net_context *context) |
| { |
| int old_rc = atomic_inc(&context->refcount); |
| |
| return old_rc + 1; |
| } |
| |
| int net_context_unref(struct net_context *context) |
| { |
| int old_rc = atomic_dec(&context->refcount); |
| |
| if (old_rc != 1) { |
| return old_rc - 1; |
| } |
| |
| k_sem_take(&contexts_lock, K_FOREVER); |
| |
| net_tcp_unref(context); |
| |
| if (context->conn_handler) { |
| net_conn_unregister(context->conn_handler); |
| context->conn_handler = NULL; |
| } |
| |
| net_context_set_state(context, NET_CONTEXT_UNCONNECTED); |
| |
| context->flags &= ~NET_CONTEXT_IN_USE; |
| |
| NET_DBG("Context %p released", context); |
| |
| k_sem_give(&contexts_lock); |
| |
| return 0; |
| } |
| |
| int net_context_put(struct net_context *context) |
| { |
| NET_ASSERT(context); |
| |
| if (!PART_OF_ARRAY(contexts, context)) { |
| return -EINVAL; |
| } |
| |
| #if defined(CONFIG_NET_OFFLOAD) |
| if (net_if_is_ip_offloaded(net_context_get_iface(context))) { |
| k_sem_take(&contexts_lock, K_FOREVER); |
| context->flags &= ~NET_CONTEXT_IN_USE; |
| k_sem_give(&contexts_lock); |
| return net_offload_put( |
| net_context_get_iface(context), context); |
| } |
| #endif /* CONFIG_NET_OFFLOAD */ |
| |
| context->connect_cb = NULL; |
| context->recv_cb = NULL; |
| context->send_cb = NULL; |
| |
| if (net_tcp_put(context) >= 0) { |
| return 0; |
| } |
| |
| net_context_unref(context); |
| return 0; |
| } |
| |
| /* If local address is not bound, bind it to INADDR_ANY and random port. */ |
| static int bind_default(struct net_context *context) |
| { |
| sa_family_t family = net_context_get_family(context); |
| |
| #if defined(CONFIG_NET_IPV6) |
| if (family == AF_INET6) { |
| struct sockaddr_in6 addr6; |
| |
| if (net_sin6_ptr(&context->local)->sin6_addr) { |
| return 0; |
| } |
| |
| addr6.sin6_family = AF_INET6; |
| memcpy(&addr6.sin6_addr, net_ipv6_unspecified_address(), |
| sizeof(addr6.sin6_addr)); |
| addr6.sin6_port = |
| find_available_port(context, |
| (struct sockaddr *)&addr6); |
| |
| return net_context_bind(context, (struct sockaddr *)&addr6, |
| sizeof(addr6)); |
| } |
| #endif |
| |
| #if defined(CONFIG_NET_IPV4) |
| if (family == AF_INET) { |
| struct sockaddr_in addr4; |
| |
| if (net_sin_ptr(&context->local)->sin_addr) { |
| return 0; |
| } |
| |
| addr4.sin_family = AF_INET; |
| addr4.sin_addr.s_addr = INADDR_ANY; |
| addr4.sin_port = |
| find_available_port(context, |
| (struct sockaddr *)&addr4); |
| |
| return net_context_bind(context, (struct sockaddr *)&addr4, |
| sizeof(addr4)); |
| } |
| #endif |
| |
| return -EINVAL; |
| } |
| |
| int net_context_bind(struct net_context *context, const struct sockaddr *addr, |
| socklen_t addrlen) |
| { |
| NET_ASSERT(addr); |
| NET_ASSERT(PART_OF_ARRAY(contexts, context)); |
| |
| /* If we already have connection handler, then it effectively |
| * means that it's already bound to an interface/port, and we |
| * don't support rebinding connection to new address/port in |
| * the code below. |
| * TODO: Support rebinding. |
| */ |
| if (context->conn_handler) { |
| return -EISCONN; |
| } |
| |
| #if defined(CONFIG_NET_IPV6) |
| if (addr->sa_family == AF_INET6) { |
| struct net_if *iface = NULL; |
| struct in6_addr *ptr; |
| struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; |
| int ret; |
| |
| if (addrlen < sizeof(struct sockaddr_in6)) { |
| return -EINVAL; |
| } |
| |
| if (net_is_ipv6_addr_mcast(&addr6->sin6_addr)) { |
| struct net_if_mcast_addr *maddr; |
| |
| maddr = net_if_ipv6_maddr_lookup(&addr6->sin6_addr, |
| &iface); |
| if (!maddr) { |
| return -ENOENT; |
| } |
| |
| ptr = &maddr->address.in6_addr; |
| |
| } else if (net_is_ipv6_addr_unspecified(&addr6->sin6_addr)) { |
| iface = net_if_get_default(); |
| |
| ptr = (struct in6_addr *)net_ipv6_unspecified_address(); |
| } else { |
| struct net_if_addr *ifaddr; |
| |
| ifaddr = net_if_ipv6_addr_lookup(&addr6->sin6_addr, |
| &iface); |
| if (!ifaddr) { |
| return -ENOENT; |
| } |
| |
| ptr = &ifaddr->address.in6_addr; |
| } |
| |
| if (!iface) { |
| NET_ERR("Cannot bind to %s", |
| net_sprint_ipv6_addr(&addr6->sin6_addr)); |
| |
| return -EADDRNOTAVAIL; |
| } |
| |
| #if defined(CONFIG_NET_OFFLOAD) |
| if (net_if_is_ip_offloaded(iface)) { |
| net_context_set_iface(context, iface); |
| |
| return net_offload_bind(iface, |
| context, |
| addr, |
| addrlen); |
| } |
| #endif /* CONFIG_NET_OFFLOAD */ |
| |
| net_context_set_iface(context, iface); |
| |
| net_sin6_ptr(&context->local)->sin6_family = AF_INET6; |
| net_sin6_ptr(&context->local)->sin6_addr = ptr; |
| if (addr6->sin6_port) { |
| ret = check_used_port(AF_INET6, addr6->sin6_port, |
| addr); |
| if (!ret) { |
| net_sin6_ptr(&context->local)->sin6_port = |
| addr6->sin6_port; |
| } else { |
| NET_ERR("Port %d is in use!", |
| ntohs(addr6->sin6_port)); |
| return ret; |
| } |
| } else { |
| addr6->sin6_port = |
| net_sin6_ptr(&context->local)->sin6_port; |
| } |
| |
| NET_DBG("Context %p binding to %s [%s]:%d iface %p", |
| context, |
| net_proto2str(net_context_get_ip_proto(context)), |
| net_sprint_ipv6_addr(ptr), ntohs(addr6->sin6_port), |
| iface); |
| |
| return 0; |
| } |
| #endif |
| |
| #if defined(CONFIG_NET_IPV4) |
| if (addr->sa_family == AF_INET) { |
| struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; |
| struct net_if *iface = NULL; |
| struct net_if_addr *ifaddr; |
| struct in_addr *ptr; |
| int ret; |
| |
| if (addrlen < sizeof(struct sockaddr_in)) { |
| return -EINVAL; |
| } |
| |
| if (net_is_ipv4_addr_mcast(&addr4->sin_addr)) { |
| struct net_if_mcast_addr *maddr; |
| |
| maddr = net_if_ipv4_maddr_lookup(&addr4->sin_addr, |
| &iface); |
| if (!maddr) { |
| return -ENOENT; |
| } |
| |
| ptr = &maddr->address.in_addr; |
| |
| } else if (addr4->sin_addr.s_addr == INADDR_ANY) { |
| iface = net_if_get_default(); |
| |
| ptr = (struct in_addr *)net_ipv4_unspecified_address(); |
| } else { |
| ifaddr = net_if_ipv4_addr_lookup(&addr4->sin_addr, |
| &iface); |
| if (!ifaddr) { |
| return -ENOENT; |
| } |
| |
| ptr = &ifaddr->address.in_addr; |
| } |
| |
| if (!iface) { |
| NET_ERR("Cannot bind to %s", |
| net_sprint_ipv4_addr(&addr4->sin_addr)); |
| |
| return -EADDRNOTAVAIL; |
| } |
| |
| #if defined(CONFIG_NET_OFFLOAD) |
| if (net_if_is_ip_offloaded(iface)) { |
| net_context_set_iface(context, iface); |
| |
| return net_offload_bind(iface, |
| context, |
| addr, |
| addrlen); |
| } |
| #endif /* CONFIG_NET_OFFLOAD */ |
| |
| net_context_set_iface(context, iface); |
| |
| net_sin_ptr(&context->local)->sin_family = AF_INET; |
| net_sin_ptr(&context->local)->sin_addr = ptr; |
| if (addr4->sin_port) { |
| ret = check_used_port(AF_INET, addr4->sin_port, |
| addr); |
| if (!ret) { |
| net_sin_ptr(&context->local)->sin_port = |
| addr4->sin_port; |
| } else { |
| NET_ERR("Port %d is in use!", |
| ntohs(addr4->sin_port)); |
| return ret; |
| } |
| } else { |
| addr4->sin_port = |
| net_sin_ptr(&context->local)->sin_port; |
| } |
| |
| NET_DBG("Context %p binding to %s %s:%d iface %p", |
| context, |
| net_proto2str(net_context_get_ip_proto(context)), |
| net_sprint_ipv4_addr(ptr), |
| ntohs(addr4->sin_port), iface); |
| |
| return 0; |
| } |
| #endif |
| |
| return -EINVAL; |
| } |
| |
| static inline struct net_context *find_context(void *conn_handler) |
| { |
| int i; |
| |
| for (i = 0; i < NET_MAX_CONTEXT; i++) { |
| if (!net_context_is_used(&contexts[i])) { |
| continue; |
| } |
| |
| if (contexts[i].conn_handler == conn_handler) { |
| return &contexts[i]; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| int net_context_listen(struct net_context *context, int backlog) |
| { |
| ARG_UNUSED(backlog); |
| |
| NET_ASSERT(PART_OF_ARRAY(contexts, context)); |
| |
| if (!net_context_is_used(context)) { |
| return -EBADF; |
| } |
| |
| #if defined(CONFIG_NET_OFFLOAD) |
| if (net_if_is_ip_offloaded(net_context_get_iface(context))) { |
| return net_offload_listen( |
| net_context_get_iface(context), context, backlog); |
| } |
| #endif /* CONFIG_NET_OFFLOAD */ |
| |
| if (net_tcp_listen(context) >= 0) { |
| return 0; |
| } |
| |
| return -EOPNOTSUPP; |
| } |
| |
| int net_context_connect(struct net_context *context, |
| const struct sockaddr *addr, |
| socklen_t addrlen, |
| net_context_connect_cb_t cb, |
| s32_t timeout, |
| void *user_data) |
| { |
| struct sockaddr *laddr = NULL; |
| struct sockaddr local_addr; |
| u16_t lport, rport; |
| int ret; |
| |
| NET_ASSERT(addr); |
| NET_ASSERT(PART_OF_ARRAY(contexts, context)); |
| |
| if (!net_context_is_used(context)) { |
| return -EBADF; |
| } |
| |
| ret = bind_default(context); |
| if (ret) { |
| return ret; |
| } |
| |
| if (addr->sa_family != net_context_get_family(context)) { |
| NET_ASSERT_INFO(addr->sa_family == \ |
| net_context_get_family(context), |
| "Family mismatch %d should be %d", |
| addr->sa_family, |
| net_context_get_family(context)); |
| return -EINVAL; |
| } |
| |
| #if defined(CONFIG_NET_OFFLOAD) |
| if (net_if_is_ip_offloaded(net_context_get_iface(context))) { |
| return net_offload_connect( |
| net_context_get_iface(context), |
| context, |
| addr, |
| addrlen, |
| cb, |
| timeout, |
| user_data); |
| } |
| #endif /* CONFIG_NET_OFFLOAD */ |
| |
| if (net_context_get_state(context) == NET_CONTEXT_LISTENING) { |
| return -EOPNOTSUPP; |
| } |
| |
| #if defined(CONFIG_NET_IPV6) |
| if (net_context_get_family(context) == AF_INET6) { |
| struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) |
| &context->remote; |
| |
| if (addrlen < sizeof(struct sockaddr_in6)) { |
| return -EINVAL; |
| } |
| |
| if (net_context_get_ip_proto(context) == IPPROTO_TCP && |
| net_is_ipv6_addr_mcast(&addr6->sin6_addr)) { |
| return -EADDRNOTAVAIL; |
| } |
| |
| memcpy(&addr6->sin6_addr, &net_sin6(addr)->sin6_addr, |
| sizeof(struct in6_addr)); |
| |
| addr6->sin6_port = net_sin6(addr)->sin6_port; |
| addr6->sin6_family = AF_INET6; |
| |
| if (!net_is_ipv6_addr_unspecified(&addr6->sin6_addr)) { |
| context->flags |= NET_CONTEXT_REMOTE_ADDR_SET; |
| } else { |
| context->flags &= ~NET_CONTEXT_REMOTE_ADDR_SET; |
| } |
| |
| rport = addr6->sin6_port; |
| |
| net_sin6_ptr(&context->local)->sin6_family = AF_INET6; |
| net_sin6(&local_addr)->sin6_family = AF_INET6; |
| net_sin6(&local_addr)->sin6_port = lport = |
| net_sin6((struct sockaddr *)&context->local)->sin6_port; |
| |
| if (net_sin6_ptr(&context->local)->sin6_addr) { |
| net_ipaddr_copy(&net_sin6(&local_addr)->sin6_addr, |
| net_sin6_ptr(&context->local)->sin6_addr); |
| |
| laddr = &local_addr; |
| } |
| } else |
| #endif /* CONFIG_NET_IPV6 */ |
| |
| #if defined(CONFIG_NET_IPV4) |
| if (net_context_get_family(context) == AF_INET) { |
| struct sockaddr_in *addr4 = (struct sockaddr_in *) |
| &context->remote; |
| |
| if (addrlen < sizeof(struct sockaddr_in)) { |
| return -EINVAL; |
| } |
| |
| /* FIXME - Add multicast and broadcast address check */ |
| |
| addr4 = (struct sockaddr_in *)&context->remote; |
| |
| memcpy(&addr4->sin_addr, &net_sin(addr)->sin_addr, |
| sizeof(struct in_addr)); |
| |
| addr4->sin_port = net_sin(addr)->sin_port; |
| addr4->sin_family = AF_INET; |
| |
| if (addr4->sin_addr.s_addr) { |
| context->flags |= NET_CONTEXT_REMOTE_ADDR_SET; |
| } else { |
| context->flags &= ~NET_CONTEXT_REMOTE_ADDR_SET; |
| } |
| |
| rport = addr4->sin_port; |
| |
| net_sin_ptr(&context->local)->sin_family = AF_INET; |
| net_sin(&local_addr)->sin_family = AF_INET; |
| net_sin(&local_addr)->sin_port = lport = |
| net_sin((struct sockaddr *)&context->local)->sin_port; |
| |
| if (net_sin_ptr(&context->local)->sin_addr) { |
| net_ipaddr_copy(&net_sin(&local_addr)->sin_addr, |
| net_sin_ptr(&context->local)->sin_addr); |
| |
| laddr = &local_addr; |
| } |
| } else |
| #endif /* CONFIG_NET_IPV4 */ |
| |
| { |
| return -EINVAL; /* Not IPv4 or IPv6 */ |
| } |
| |
| switch (net_context_get_type(context)) { |
| #if defined(CONFIG_NET_UDP) |
| case SOCK_DGRAM: |
| if (cb) { |
| cb(context, 0, user_data); |
| } |
| |
| return 0; |
| |
| #endif /* CONFIG_NET_UDP */ |
| |
| case SOCK_STREAM: |
| return net_tcp_connect(context, addr, laddr, rport, lport, |
| timeout, cb, user_data); |
| |
| default: |
| return -ENOTSUP; |
| } |
| |
| return 0; |
| } |
| |
| int net_context_accept(struct net_context *context, |
| net_tcp_accept_cb_t cb, |
| s32_t timeout, |
| void *user_data) |
| { |
| NET_ASSERT(PART_OF_ARRAY(contexts, context)); |
| |
| if (!net_context_is_used(context)) { |
| return -EBADF; |
| } |
| |
| #if defined(CONFIG_NET_OFFLOAD) |
| if (net_if_is_ip_offloaded(net_context_get_iface(context))) { |
| return net_offload_accept( |
| net_context_get_iface(context), |
| context, |
| cb, |
| timeout, |
| user_data); |
| } |
| #endif /* CONFIG_NET_OFFLOAD */ |
| |
| if ((net_context_get_state(context) != NET_CONTEXT_LISTENING) && |
| (net_context_get_type(context) != SOCK_STREAM)) { |
| NET_DBG("Invalid socket, state %d type %d", |
| net_context_get_state(context), |
| net_context_get_type(context)); |
| return -EINVAL; |
| } |
| |
| if (net_context_get_ip_proto(context) == IPPROTO_TCP) { |
| return net_tcp_accept(context, cb, user_data); |
| } |
| |
| return 0; |
| } |
| |
| #if defined(CONFIG_NET_UDP) |
| static int create_udp_packet(struct net_context *context, |
| struct net_pkt *pkt, |
| const struct sockaddr *dst_addr, |
| struct net_pkt **out_pkt) |
| { |
| int r = 0; |
| struct net_pkt *tmp; |
| |
| #if defined(CONFIG_NET_IPV6) |
| if (net_pkt_family(pkt) == AF_INET6) { |
| struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)dst_addr; |
| |
| pkt = net_ipv6_create(context, pkt, NULL, &addr6->sin6_addr); |
| tmp = net_udp_insert(context, pkt, |
| net_pkt_ip_hdr_len(pkt) + |
| net_pkt_ipv6_ext_len(pkt), |
| addr6->sin6_port); |
| if (!tmp) { |
| return -ENOMEM; |
| } |
| |
| pkt = tmp; |
| |
| r = net_ipv6_finalize(context, pkt); |
| } else |
| #endif /* CONFIG_NET_IPV6 */ |
| |
| #if defined(CONFIG_NET_IPV4) |
| if (net_pkt_family(pkt) == AF_INET) { |
| struct sockaddr_in *addr4 = (struct sockaddr_in *)dst_addr; |
| |
| pkt = net_ipv4_create(context, pkt, NULL, &addr4->sin_addr); |
| tmp = net_udp_insert(context, pkt, net_pkt_ip_hdr_len(pkt), |
| addr4->sin_port); |
| if (!tmp) { |
| return -ENOMEM; |
| } |
| |
| pkt = tmp; |
| |
| r = net_ipv4_finalize(context, pkt); |
| } else |
| #endif /* CONFIG_NET_IPV4 */ |
| { |
| return -EPROTONOSUPPORT; |
| } |
| |
| *out_pkt = pkt; |
| |
| return r; |
| } |
| #endif /* CONFIG_NET_UDP */ |
| |
| static int sendto(struct net_pkt *pkt, |
| const struct sockaddr *dst_addr, |
| socklen_t addrlen, |
| net_context_send_cb_t cb, |
| s32_t timeout, |
| void *token, |
| void *user_data) |
| { |
| struct net_context *context = net_pkt_context(pkt); |
| int ret = 0; |
| |
| if (!net_context_is_used(context)) { |
| return -EBADF; |
| } |
| |
| if (!dst_addr) { |
| return -EDESTADDRREQ; |
| } |
| |
| #if defined(CONFIG_NET_IPV6) |
| if (net_pkt_family(pkt) == AF_INET6) { |
| struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)dst_addr; |
| |
| if (addrlen < sizeof(struct sockaddr_in6)) { |
| return -EINVAL; |
| } |
| |
| if (net_is_ipv6_addr_unspecified(&addr6->sin6_addr)) { |
| return -EDESTADDRREQ; |
| } |
| } else |
| #endif /* CONFIG_NET_IPV6 */ |
| |
| #if defined(CONFIG_NET_IPV4) |
| if (net_pkt_family(pkt) == AF_INET) { |
| struct sockaddr_in *addr4 = (struct sockaddr_in *)dst_addr; |
| |
| if (addrlen < sizeof(struct sockaddr_in)) { |
| return -EINVAL; |
| } |
| |
| if (!addr4->sin_addr.s_addr) { |
| return -EDESTADDRREQ; |
| } |
| } else |
| #endif /* CONFIG_NET_IPV4 */ |
| { |
| NET_DBG("Invalid protocol family %d", net_pkt_family(pkt)); |
| return -EINVAL; |
| } |
| |
| #if defined(CONFIG_NET_OFFLOAD) |
| if (net_if_is_ip_offloaded(net_pkt_iface(pkt))) { |
| return net_offload_sendto( |
| net_pkt_iface(pkt), |
| pkt, dst_addr, addrlen, |
| cb, timeout, token, user_data); |
| } |
| #endif /* CONFIG_NET_OFFLOAD */ |
| |
| switch (net_context_get_ip_proto(context)) { |
| case IPPROTO_UDP: |
| #if defined(CONFIG_NET_UDP) |
| /* Bind default address and port only if UDP */ |
| ret = bind_default(context); |
| if (ret) { |
| return ret; |
| } |
| |
| ret = create_udp_packet(context, pkt, dst_addr, &pkt); |
| #endif /* CONFIG_NET_UDP */ |
| break; |
| |
| case IPPROTO_TCP: |
| ret = net_tcp_queue_data(context, pkt); |
| break; |
| |
| default: |
| ret = -EPROTONOSUPPORT; |
| } |
| |
| if (ret < 0) { |
| if (ret == -EPROTONOSUPPORT) { |
| NET_DBG("Unknown protocol while sending packet: %d", |
| net_context_get_ip_proto(context)); |
| } else { |
| NET_DBG("Could not create network packet to send (%d)", |
| ret); |
| } |
| |
| return ret; |
| } |
| |
| context->send_cb = cb; |
| context->user_data = user_data; |
| net_pkt_set_token(pkt, token); |
| |
| switch (net_context_get_ip_proto(context)) { |
| case IPPROTO_UDP: |
| return net_send_data(pkt); |
| |
| case IPPROTO_TCP: |
| return net_tcp_send_data(context, cb, token, user_data); |
| |
| default: |
| return -EPROTONOSUPPORT; |
| } |
| } |
| |
| int net_context_send(struct net_pkt *pkt, |
| net_context_send_cb_t cb, |
| s32_t timeout, |
| void *token, |
| void *user_data) |
| { |
| struct net_context *context = net_pkt_context(pkt); |
| socklen_t addrlen; |
| |
| NET_ASSERT(PART_OF_ARRAY(contexts, context)); |
| |
| #if defined(CONFIG_NET_OFFLOAD) |
| if (net_if_is_ip_offloaded(net_pkt_iface(pkt))) { |
| return net_offload_send( |
| net_pkt_iface(pkt), |
| pkt, cb, timeout, |
| token, user_data); |
| } |
| #endif /* CONFIG_NET_OFFLOAD */ |
| |
| if (!(context->flags & NET_CONTEXT_REMOTE_ADDR_SET) || |
| !net_sin(&context->remote)->sin_port) { |
| return -EDESTADDRREQ; |
| } |
| |
| #if defined(CONFIG_NET_IPV6) |
| if (net_pkt_family(pkt) == AF_INET6) { |
| addrlen = sizeof(struct sockaddr_in6); |
| } else |
| #endif /* CONFIG_NET_IPV6 */ |
| |
| #if defined(CONFIG_NET_IPV4) |
| if (net_pkt_family(pkt) == AF_INET) { |
| addrlen = sizeof(struct sockaddr_in); |
| } else |
| #endif /* CONFIG_NET_IPV4 */ |
| { |
| addrlen = 0; |
| } |
| |
| return sendto(pkt, &context->remote, addrlen, cb, timeout, token, |
| user_data); |
| } |
| |
| int net_context_sendto(struct net_pkt *pkt, |
| const struct sockaddr *dst_addr, |
| socklen_t addrlen, |
| net_context_send_cb_t cb, |
| s32_t timeout, |
| void *token, |
| void *user_data) |
| { |
| struct net_context *context = net_pkt_context(pkt); |
| |
| NET_ASSERT(PART_OF_ARRAY(contexts, context)); |
| |
| if (net_context_get_ip_proto(context) == IPPROTO_TCP) { |
| /* Match POSIX behavior and ignore dst_address and addrlen */ |
| return net_context_send(pkt, cb, timeout, token, user_data); |
| } |
| |
| return sendto(pkt, dst_addr, addrlen, cb, timeout, token, user_data); |
| } |
| |
| void net_context_set_appdata_values(struct net_pkt *pkt, |
| enum net_ip_protocol proto) |
| { |
| size_t total_len = net_pkt_get_len(pkt); |
| u16_t proto_len = 0; |
| struct net_buf *frag; |
| u16_t offset; |
| |
| switch (proto) { |
| case IPPROTO_UDP: |
| #if defined(CONFIG_NET_UDP) |
| proto_len = sizeof(struct net_udp_hdr); |
| #endif /* CONFIG_NET_UDP */ |
| break; |
| |
| case IPPROTO_TCP: |
| proto_len = tcp_hdr_len(pkt); |
| break; |
| |
| default: |
| return; |
| } |
| |
| frag = net_frag_get_pos(pkt, net_pkt_ip_hdr_len(pkt) + |
| net_pkt_ipv6_ext_len(pkt) + |
| proto_len, |
| &offset); |
| if (frag) { |
| net_pkt_set_appdata(pkt, frag->data + offset); |
| } |
| |
| net_pkt_set_appdatalen(pkt, total_len - net_pkt_ip_hdr_len(pkt) - |
| net_pkt_ipv6_ext_len(pkt) - proto_len); |
| |
| NET_ASSERT_INFO(net_pkt_appdatalen(pkt) < total_len, |
| "Wrong appdatalen %u, total %zu", |
| net_pkt_appdatalen(pkt), total_len); |
| } |
| |
| enum net_verdict net_context_packet_received(struct net_conn *conn, |
| struct net_pkt *pkt, |
| void *user_data) |
| { |
| struct net_context *context = find_context(conn); |
| |
| NET_ASSERT(context); |
| NET_ASSERT(net_pkt_iface(pkt)); |
| |
| net_context_set_iface(context, net_pkt_iface(pkt)); |
| net_pkt_set_context(pkt, context); |
| |
| /* If there is no callback registered, then we can only drop |
| * the packet. |
| */ |
| |
| if (!context->recv_cb) { |
| return NET_DROP; |
| } |
| |
| if (net_context_get_ip_proto(context) != IPPROTO_TCP) { |
| /* TCP packets get appdata earlier in tcp_established(). */ |
| net_context_set_appdata_values(pkt, IPPROTO_UDP); |
| } else { |
| net_stats_update_tcp_recv(net_pkt_iface(pkt), |
| net_pkt_appdatalen(pkt)); |
| } |
| |
| NET_DBG("Set appdata %p to len %u (total %zu)", |
| net_pkt_appdata(pkt), net_pkt_appdatalen(pkt), |
| net_pkt_get_len(pkt)); |
| |
| context->recv_cb(context, pkt, 0, user_data); |
| |
| #if defined(CONFIG_NET_CONTEXT_SYNC_RECV) |
| k_sem_give(&context->recv_data_wait); |
| #endif /* CONFIG_NET_CONTEXT_SYNC_RECV */ |
| |
| return NET_OK; |
| } |
| |
| #if defined(CONFIG_NET_UDP) |
| static int recv_udp(struct net_context *context, |
| net_context_recv_cb_t cb, |
| s32_t timeout, |
| void *user_data) |
| { |
| struct sockaddr local_addr = { |
| .sa_family = net_context_get_family(context), |
| }; |
| struct sockaddr *laddr = NULL; |
| u16_t lport = 0; |
| int ret; |
| |
| ARG_UNUSED(timeout); |
| |
| if (context->conn_handler) { |
| net_conn_unregister(context->conn_handler); |
| context->conn_handler = NULL; |
| } |
| |
| ret = bind_default(context); |
| if (ret) { |
| return ret; |
| } |
| |
| #if defined(CONFIG_NET_IPV6) |
| if (net_context_get_family(context) == AF_INET6) { |
| if (net_sin6_ptr(&context->local)->sin6_addr) { |
| net_ipaddr_copy(&net_sin6(&local_addr)->sin6_addr, |
| net_sin6_ptr(&context->local)->sin6_addr); |
| |
| laddr = &local_addr; |
| } |
| |
| net_sin6(&local_addr)->sin6_port = |
| net_sin6((struct sockaddr *)&context->local)->sin6_port; |
| lport = net_sin6((struct sockaddr *)&context->local)->sin6_port; |
| } |
| #endif /* CONFIG_NET_IPV6 */ |
| |
| #if defined(CONFIG_NET_IPV4) |
| if (net_context_get_family(context) == AF_INET) { |
| if (net_sin_ptr(&context->local)->sin_addr) { |
| net_ipaddr_copy(&net_sin(&local_addr)->sin_addr, |
| net_sin_ptr(&context->local)->sin_addr); |
| |
| laddr = &local_addr; |
| } |
| |
| lport = net_sin((struct sockaddr *)&context->local)->sin_port; |
| } |
| #endif /* CONFIG_NET_IPV4 */ |
| |
| context->recv_cb = cb; |
| |
| ret = net_conn_register(net_context_get_ip_proto(context), |
| context->flags & NET_CONTEXT_REMOTE_ADDR_SET ? |
| &context->remote : NULL, |
| laddr, |
| ntohs(net_sin(&context->remote)->sin_port), |
| ntohs(lport), |
| net_context_packet_received, |
| user_data, |
| &context->conn_handler); |
| |
| return ret; |
| } |
| #endif /* CONFIG_NET_UDP */ |
| |
| int net_context_recv(struct net_context *context, |
| net_context_recv_cb_t cb, |
| s32_t timeout, |
| void *user_data) |
| { |
| int ret; |
| NET_ASSERT(context); |
| |
| if (!net_context_is_used(context)) { |
| return -EBADF; |
| } |
| |
| #if defined(CONFIG_NET_OFFLOAD) |
| if (net_if_is_ip_offloaded(net_context_get_iface(context))) { |
| return net_offload_recv( |
| net_context_get_iface(context), |
| context, cb, timeout, user_data); |
| } |
| #endif /* CONFIG_NET_OFFLOAD */ |
| |
| switch (net_context_get_ip_proto(context)) { |
| #if defined(CONFIG_NET_UDP) |
| case IPPROTO_UDP: |
| ret = recv_udp(context, cb, timeout, user_data); |
| break; |
| #endif /* CONFIG_NET_UDP */ |
| |
| case IPPROTO_TCP: |
| ret = net_tcp_recv(context, cb, user_data); |
| break; |
| |
| default: |
| ret = -EPROTOTYPE; |
| break; |
| } |
| |
| if (ret < 0) { |
| return ret; |
| } |
| |
| #if defined(CONFIG_NET_CONTEXT_SYNC_RECV) |
| if (timeout) { |
| int ret; |
| |
| /* Make sure we have the lock, then the |
| * net_context_packet_received() callback will release the |
| * semaphore when data has been received. |
| */ |
| k_sem_reset(&context->recv_data_wait); |
| |
| ret = k_sem_take(&context->recv_data_wait, timeout); |
| if (ret == -EAGAIN) { |
| return -ETIMEDOUT; |
| } |
| } |
| #endif /* CONFIG_NET_CONTEXT_SYNC_RECV */ |
| |
| return 0; |
| } |
| |
| int net_context_update_recv_wnd(struct net_context *context, |
| s32_t delta) { |
| return net_tcp_update_recv_wnd(context, delta); |
| } |
| |
| static int set_context_priority(struct net_context *context, |
| const void *value, size_t len) |
| { |
| #if defined(CONFIG_NET_CONTEXT_PRIORITY) |
| if (len > sizeof(u8_t)) { |
| return -EINVAL; |
| } |
| |
| context->options.priority = *((u8_t *)value); |
| |
| return 0; |
| #else |
| return -ENOTSUP; |
| #endif |
| } |
| |
| static int get_context_priority(struct net_context *context, |
| void *value, size_t *len) |
| { |
| #if defined(CONFIG_NET_CONTEXT_PRIORITY) |
| *((u8_t *)value) = context->options.priority; |
| |
| if (len) { |
| *len = sizeof(u8_t); |
| } |
| |
| return 0; |
| #else |
| return -ENOTSUP; |
| #endif |
| } |
| |
| int net_context_set_option(struct net_context *context, |
| enum net_context_option option, |
| const void *value, size_t len) |
| { |
| int ret = 0; |
| |
| NET_ASSERT(context); |
| |
| if (!PART_OF_ARRAY(contexts, context)) { |
| return -EINVAL; |
| } |
| |
| switch (option) { |
| case NET_OPT_PRIORITY: |
| ret = set_context_priority(context, value, len); |
| break; |
| } |
| |
| return ret; |
| } |
| |
| int net_context_get_option(struct net_context *context, |
| enum net_context_option option, |
| void *value, size_t *len) |
| { |
| int ret = 0; |
| |
| NET_ASSERT(context); |
| |
| if (!PART_OF_ARRAY(contexts, context)) { |
| return -EINVAL; |
| } |
| |
| switch (option) { |
| case NET_OPT_PRIORITY: |
| ret = get_context_priority(context, value, len); |
| break; |
| } |
| |
| return ret; |
| } |
| |
| void net_context_foreach(net_context_cb_t cb, void *user_data) |
| { |
| int i; |
| |
| k_sem_take(&contexts_lock, K_FOREVER); |
| |
| for (i = 0; i < NET_MAX_CONTEXT; i++) { |
| if (!net_context_is_used(&contexts[i])) { |
| continue; |
| } |
| |
| cb(&contexts[i], user_data); |
| } |
| |
| k_sem_give(&contexts_lock); |
| } |
| |
| void net_context_init(void) |
| { |
| k_sem_init(&contexts_lock, 1, UINT_MAX); |
| } |