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Implement IPv6 sockets for lwIP (#3015)

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Co-authored-by: Oxan van Leeuwen <oxan@oxanvanleeuwen.nl>
This commit is contained in:
Jimmy Hedman 2022-01-21 10:08:54 +01:00 committed by GitHub
parent 6f8c7d9ec4
commit ef88f9923f
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 73 additions and 40 deletions
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113
esphome/components/socket/lwip_raw_tcp_impl.cpp
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@ -28,7 +28,7 @@ static const char *const TAG = "socket.lwip";
class LWIPRawImpl : public Socket {
public:
LWIPRawImpl(struct tcp_pcb *pcb) : pcb_(pcb) {}
LWIPRawImpl(sa_family_t family, struct tcp_pcb *pcb) : pcb_(pcb), family_(family) {}
~LWIPRawImpl() override {
if (pcb_ != nullptr) {
LWIP_LOG("tcp_abort(%p)", pcb_);
@ -73,10 +73,9 @@ class LWIPRawImpl : public Socket {
}
ip_addr_t ip;
in_port_t port;
auto family = name->sa_family;
#if LWIP_IPV6
if (family == AF_INET) {
if (addrlen < sizeof(sockaddr_in6)) {
if (family_ == AF_INET) {
if (addrlen < sizeof(sockaddr_in)) {
errno = EINVAL;
return -1;
}
@ -84,30 +83,31 @@ class LWIPRawImpl : public Socket {
port = ntohs(addr4->sin_port);
ip.type = IPADDR_TYPE_V4;
ip.u_addr.ip4.addr = addr4->sin_addr.s_addr;
} else if (family == AF_INET6) {
if (addrlen < sizeof(sockaddr_in)) {
LWIP_LOG("tcp_bind(%p ip=%s port=%u)", pcb_, ip4addr_ntoa(&ip.u_addr.ip4), port);
} else if (family_ == AF_INET6) {
if (addrlen < sizeof(sockaddr_in6)) {
errno = EINVAL;
return -1;
}
auto *addr6 = reinterpret_cast<const sockaddr_in6 *>(name);
port = ntohs(addr6->sin6_port);
ip.type = IPADDR_TYPE_V6;
ip.type = IPADDR_TYPE_ANY;
memcpy(&ip.u_addr.ip6.addr, &addr6->sin6_addr.un.u8_addr, 16);
LWIP_LOG("tcp_bind(%p ip=%s port=%u)", pcb_, ip6addr_ntoa(&ip.u_addr.ip6), port);
} else {
errno = EINVAL;
return -1;
}
#else
if (family != AF_INET) {
if (family_ != AF_INET) {
errno = EINVAL;
return -1;
}
auto *addr4 = reinterpret_cast<const sockaddr_in *>(name);
port = ntohs(addr4->sin_port);
ip.addr = addr4->sin_addr.s_addr;
#endif
LWIP_LOG("tcp_bind(%p ip=%u port=%u)", pcb_, ip.addr, port);
#endif
err_t err = tcp_bind(pcb_, &ip, port);
if (err == ERR_USE) {
LWIP_LOG(" -> err ERR_USE");
@ -178,26 +178,22 @@ class LWIPRawImpl : public Socket {
errno = EINVAL;
return -1;
}
if (*addrlen < sizeof(struct sockaddr_in)) {
errno = EINVAL;
return -1;
}
struct sockaddr_in *addr = reinterpret_cast<struct sockaddr_in *>(name);
addr->sin_family = AF_INET;
*addrlen = addr->sin_len = sizeof(struct sockaddr_in);
addr->sin_port = pcb_->remote_port;
addr->sin_addr.s_addr = pcb_->remote_ip.addr;
return 0;
return this->ip2sockaddr_(&pcb_->local_ip, pcb_->local_port, name, addrlen);
}
std::string getpeername() override {
if (pcb_ == nullptr) {
errno = ECONNRESET;
return "";
}
char buffer[24];
uint32_t ip4 = pcb_->remote_ip.addr;
snprintf(buffer, sizeof(buffer), "%d.%d.%d.%d", (ip4 >> 0) & 0xFF, (ip4 >> 8) & 0xFF, (ip4 >> 16) & 0xFF,
(ip4 >> 24) & 0xFF);
char buffer[50] = {};
if (IP_IS_V4_VAL(pcb_->remote_ip)) {
inet_ntoa_r(pcb_->remote_ip, buffer, sizeof(buffer));
}
#if LWIP_IPV6
else if (IP_IS_V6_VAL(pcb_->remote_ip)) {
inet6_ntoa_r(pcb_->remote_ip, buffer, sizeof(buffer));
}
#endif
return std::string(buffer);
}
int getsockname(struct sockaddr *name, socklen_t *addrlen) override {
@ -209,26 +205,22 @@ class LWIPRawImpl : public Socket {
errno = EINVAL;
return -1;
}
if (*addrlen < sizeof(struct sockaddr_in)) {
errno = EINVAL;
return -1;
}
struct sockaddr_in *addr = reinterpret_cast<struct sockaddr_in *>(name);
addr->sin_family = AF_INET;
*addrlen = addr->sin_len = sizeof(struct sockaddr_in);
addr->sin_port = pcb_->local_port;
addr->sin_addr.s_addr = pcb_->local_ip.addr;
return 0;
return this->ip2sockaddr_(&pcb_->local_ip, pcb_->local_port, name, addrlen);
}
std::string getsockname() override {
if (pcb_ == nullptr) {
errno = ECONNRESET;
return "";
}
char buffer[24];
uint32_t ip4 = pcb_->local_ip.addr;
snprintf(buffer, sizeof(buffer), "%d.%d.%d.%d", (ip4 >> 0) & 0xFF, (ip4 >> 8) & 0xFF, (ip4 >> 16) & 0xFF,
(ip4 >> 24) & 0xFF);
char buffer[50] = {};
if (IP_IS_V4_VAL(pcb_->local_ip)) {
inet_ntoa_r(pcb_->local_ip, buffer, sizeof(buffer));
}
#if LWIP_IPV6
else if (IP_IS_V6_VAL(pcb_->local_ip)) {
inet6_ntoa_r(pcb_->local_ip, buffer, sizeof(buffer));
}
#endif
return std::string(buffer);
}
int getsockopt(int level, int optname, void *optval, socklen_t *optlen) override {
@ -497,7 +489,7 @@ class LWIPRawImpl : public Socket {
// nothing to do here, we just don't push it to the queue
return ERR_OK;
}
auto sock = make_unique<LWIPRawImpl>(newpcb);
auto sock = make_unique<LWIPRawImpl>(family_, newpcb);
sock->init();
accepted_sockets_.push(std::move(sock));
return ERR_OK;
@ -549,6 +541,46 @@ class LWIPRawImpl : public Socket {
}
protected:
int ip2sockaddr_(ip_addr_t *ip, uint16_t port, struct sockaddr *name, socklen_t *addrlen) {
if (family_ == AF_INET) {
if (*addrlen < sizeof(struct sockaddr_in)) {
errno = EINVAL;
return -1;
}
struct sockaddr_in *addr = reinterpret_cast<struct sockaddr_in *>(name);
addr->sin_family = AF_INET;
*addrlen = addr->sin_len = sizeof(struct sockaddr_in);
addr->sin_port = port;
inet_addr_from_ip4addr(&addr->sin_addr, ip_2_ip4(ip));
return 0;
}
#if LWIP_IPV6
else if (family_ == AF_INET6) {
if (*addrlen < sizeof(struct sockaddr_in6)) {
errno = EINVAL;
return -1;
}
struct sockaddr_in6 *addr = reinterpret_cast<struct sockaddr_in6 *>(name);
addr->sin6_family = AF_INET6;
*addrlen = addr->sin6_len = sizeof(struct sockaddr_in6);
addr->sin6_port = port;
// AF_INET6 sockets are bound to IPv4 as well, so we may encounter IPv4 addresses that must be converted to IPv6.
if (IP_IS_V4(ip)) {
ip_addr_t mapped;
ip4_2_ipv4_mapped_ipv6(ip_2_ip6(&mapped), ip_2_ip4(ip));
inet6_addr_from_ip6addr(&addr->sin6_addr, ip_2_ip6(&mapped));
} else {
inet6_addr_from_ip6addr(&addr->sin6_addr, ip_2_ip6(ip));
}
return 0;
}
#endif
return -1;
}
struct tcp_pcb *pcb_;
std::queue<std::unique_ptr<LWIPRawImpl>> accepted_sockets_;
bool rx_closed_ = false;
@ -557,13 +589,14 @@ class LWIPRawImpl : public Socket {
// don't use lwip nodelay flag, it sometimes causes reconnect
// instead use it for determining whether to call lwip_output
bool nodelay_ = false;
sa_family_t family_ = 0;
};
std::unique_ptr<Socket> socket(int domain, int type, int protocol) {
auto *pcb = tcp_new();
if (pcb == nullptr)
return nullptr;
auto *sock = new LWIPRawImpl(pcb); // NOLINT(cppcoreguidelines-owning-memory)
auto *sock = new LWIPRawImpl((sa_family_t) domain, pcb); // NOLINT(cppcoreguidelines-owning-memory)
sock->init();
return std::unique_ptr<Socket>{sock};
}