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-rw-r--r--src/net.c664
1 files changed, 664 insertions, 0 deletions
diff --git a/src/net.c b/src/net.c
new file mode 100644
index 0000000..9c4a8e2
--- /dev/null
+++ b/src/net.c
@@ -0,0 +1,664 @@
+/*
+ * Copyright 2019-2021 OARC, Inc.
+ * Copyright 2017-2018 Akamai Technologies
+ * Copyright 2006-2016 Nominum, Inc.
+ * All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "config.h"
+
+#include "net.h"
+
+#include "log.h"
+#include "opt.h"
+#include "os.h"
+#include "strerror.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <poll.h>
+#include <openssl/err.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+
+#define TCP_RECV_BUF_SIZE (16 * 1024)
+#define TCP_SEND_BUF_SIZE (4 * 1024)
+
+static SSL_CTX* ssl_ctx = 0;
+
+int perf_net_parsefamily(const char* family)
+{
+ if (family == NULL || strcmp(family, "any") == 0)
+ return AF_UNSPEC;
+ else if (strcmp(family, "inet") == 0)
+ return AF_INET;
+#ifdef AF_INET6
+ else if (strcmp(family, "inet6") == 0)
+ return AF_INET6;
+#endif
+ else {
+ fprintf(stderr, "invalid family %s\n", family);
+ perf_opt_usage();
+ exit(1);
+ }
+}
+
+void perf_sockaddr_fromin(perf_sockaddr_t* sockaddr, const struct in_addr* in, in_port_t port)
+{
+ memset(sockaddr, 0, sizeof(*sockaddr));
+ sockaddr->sa.sin.sin_family = AF_INET;
+ sockaddr->sa.sin.sin_addr = *in;
+ sockaddr->sa.sin.sin_port = htons(port);
+ sockaddr->length = sizeof(sockaddr->sa.sin);
+}
+
+void perf_sockaddr_fromin6(perf_sockaddr_t* sockaddr, const struct in6_addr* in, in_port_t port)
+{
+ memset(sockaddr, 0, sizeof(*sockaddr));
+ sockaddr->sa.sin6.sin6_family = AF_INET6;
+ sockaddr->sa.sin6.sin6_addr = *in;
+ sockaddr->sa.sin6.sin6_port = htons(port);
+ sockaddr->length = sizeof(sockaddr->sa.sin6);
+}
+
+in_port_t perf_sockaddr_port(const perf_sockaddr_t* sockaddr)
+{
+ switch (sockaddr->sa.sa.sa_family) {
+ case AF_INET:
+ return sockaddr->sa.sin.sin_port;
+ case AF_INET6:
+ return sockaddr->sa.sin6.sin6_port;
+ default:
+ break;
+ }
+ return 0;
+}
+
+void perf_sockaddr_setport(perf_sockaddr_t* sockaddr, in_port_t port)
+{
+ switch (sockaddr->sa.sa.sa_family) {
+ case AF_INET:
+ sockaddr->sa.sin.sin_port = port;
+ break;
+ case AF_INET6:
+ sockaddr->sa.sin6.sin6_port = port;
+ break;
+ default:
+ break;
+ }
+}
+
+void perf_sockaddr_format(const perf_sockaddr_t* sockaddr, char* buf, size_t len)
+{
+ const void* src;
+
+ *buf = 0;
+
+ switch (sockaddr->sa.sa.sa_family) {
+ case AF_INET:
+ src = &sockaddr->sa.sin.sin_addr;
+ break;
+ case AF_INET6:
+ src = &sockaddr->sa.sin6.sin6_addr;
+ break;
+ default:
+ return;
+ }
+
+ (void)inet_ntop(sockaddr->sa.sa.sa_family, src, buf, len);
+}
+
+void perf_net_parseserver(int family, const char* name, unsigned int port, perf_sockaddr_t* addr)
+{
+ struct addrinfo* ai;
+
+ if (getaddrinfo(name, 0, 0, &ai) == 0) {
+ struct addrinfo* a;
+
+ for (a = ai; a; a = a->ai_next) {
+ if (a->ai_family == family || family == AF_UNSPEC) {
+ switch (a->ai_family) {
+ case AF_INET:
+ perf_sockaddr_fromin(addr, &((struct sockaddr_in*)a->ai_addr)->sin_addr, port);
+ break;
+ case AF_INET6:
+ perf_sockaddr_fromin6(addr, &((struct sockaddr_in6*)a->ai_addr)->sin6_addr, port);
+ break;
+ default:
+ continue;
+ }
+
+ freeaddrinfo(ai);
+ return;
+ }
+ }
+ freeaddrinfo(ai);
+ }
+
+ fprintf(stderr, "invalid server address %s\n", name);
+ perf_opt_usage();
+ exit(1);
+}
+
+void perf_net_parselocal(int family, const char* name, unsigned int port,
+ perf_sockaddr_t* addr)
+{
+ struct in_addr in4a;
+ struct in6_addr in6a;
+
+ if (name == NULL) {
+ switch (family) {
+ case AF_INET:
+ in4a.s_addr = INADDR_ANY;
+ perf_sockaddr_fromin(addr, &in4a, port);
+ return;
+ case AF_INET6:
+ perf_sockaddr_fromin6(addr, &in6addr_any, port);
+ return;
+ default:
+ break;
+ }
+ } else if (inet_pton(AF_INET, name, &in4a) == 1) {
+ perf_sockaddr_fromin(addr, &in4a, port);
+ return;
+ } else if (inet_pton(AF_INET6, name, &in6a) == 1) {
+ perf_sockaddr_fromin6(addr, &in6a, port);
+ return;
+ }
+
+ fprintf(stderr, "invalid local address %s\n", name);
+ perf_opt_usage();
+ exit(1);
+}
+
+struct perf_net_socket perf_net_opensocket(enum perf_net_mode mode, const perf_sockaddr_t* server, const perf_sockaddr_t* local, unsigned int offset, int bufsize)
+{
+ int family;
+ perf_sockaddr_t tmp;
+ int port;
+ int ret;
+ int flags;
+ struct perf_net_socket sock = { .mode = mode, .is_ready = 1 };
+
+ family = server->sa.sa.sa_family;
+
+ if (local->sa.sa.sa_family != family) {
+ perf_log_fatal("server and local addresses have different families");
+ }
+
+ switch (mode) {
+ case sock_udp:
+ sock.fd = socket(family, SOCK_DGRAM, 0);
+ break;
+ case sock_tls:
+ if (pthread_mutex_init(&sock.lock, 0)) {
+ perf_log_fatal("pthread_mutex_init() failed");
+ }
+ if ((sock.fd = socket(family, SOCK_STREAM, 0)) < 0) {
+ char __s[256];
+ perf_log_fatal("socket: %s", perf_strerror_r(errno, __s, sizeof(__s)));
+ }
+ if (!ssl_ctx) {
+#ifdef HAVE_TLS_METHOD
+ if (!(ssl_ctx = SSL_CTX_new(TLS_method()))) {
+ perf_log_fatal("SSL_CTX_new(): %s", ERR_error_string(ERR_get_error(), 0));
+ }
+ if (!SSL_CTX_set_min_proto_version(ssl_ctx, TLS1_2_VERSION)) {
+ perf_log_fatal("SSL_CTX_set_min_proto_version(TLS1_2_VERSION): %s", ERR_error_string(ERR_get_error(), 0));
+ }
+#else
+ if (!(ssl_ctx = SSL_CTX_new(SSLv23_client_method()))) {
+ perf_log_fatal("SSL_CTX_new(): %s", ERR_error_string(ERR_get_error(), 0));
+ }
+#endif
+ }
+ if (!(sock.ssl = SSL_new(ssl_ctx))) {
+ perf_log_fatal("SSL_new(): %s", ERR_error_string(ERR_get_error(), 0));
+ }
+ if (!(ret = SSL_set_fd(sock.ssl, sock.fd))) {
+ perf_log_fatal("SSL_set_fd(): %s", ERR_error_string(SSL_get_error(sock.ssl, ret), 0));
+ }
+ break;
+ case sock_tcp:
+ sock.fd = socket(family, SOCK_STREAM, 0);
+ break;
+ default:
+ perf_log_fatal("perf_net_opensocket(): invalid mode");
+ }
+
+ if (sock.fd == -1) {
+ char __s[256];
+ perf_log_fatal("socket: %s", perf_strerror_r(errno, __s, sizeof(__s)));
+ }
+
+#if defined(AF_INET6) && defined(IPV6_V6ONLY)
+ if (family == AF_INET6) {
+ int on = 1;
+
+ if (setsockopt(sock.fd, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)) == -1) {
+ perf_log_warning("setsockopt(IPV6_V6ONLY) failed");
+ }
+ }
+#endif
+
+ tmp = *local;
+ port = perf_sockaddr_port(&tmp);
+ if (port != 0 && offset != 0) {
+ port += offset;
+ if (port >= 0xFFFF)
+ perf_log_fatal("port %d out of range", port);
+ perf_sockaddr_setport(&tmp, port);
+ }
+
+ if (bind(sock.fd, &tmp.sa.sa, tmp.length) == -1) {
+ char __s[256];
+ perf_log_fatal("bind: %s", perf_strerror_r(errno, __s, sizeof(__s)));
+ }
+
+ if (bufsize > 0) {
+ bufsize *= 1024;
+
+ ret = setsockopt(sock.fd, SOL_SOCKET, SO_RCVBUF,
+ &bufsize, sizeof(bufsize));
+ if (ret < 0)
+ perf_log_warning("setsockbuf(SO_RCVBUF) failed");
+
+ ret = setsockopt(sock.fd, SOL_SOCKET, SO_SNDBUF,
+ &bufsize, sizeof(bufsize));
+ if (ret < 0)
+ perf_log_warning("setsockbuf(SO_SNDBUF) failed");
+ }
+
+ flags = fcntl(sock.fd, F_GETFL, 0);
+ if (flags < 0)
+ perf_log_fatal("fcntl(F_GETFL)");
+ ret = fcntl(sock.fd, F_SETFL, flags | O_NONBLOCK);
+ if (ret < 0)
+ perf_log_fatal("fcntl(F_SETFL)");
+
+ if (mode == sock_tcp || mode == sock_tls) {
+ if (connect(sock.fd, &server->sa.sa, server->length)) {
+ if (errno == EINPROGRESS) {
+ sock.is_ready = 0;
+ } else {
+ char __s[256];
+ perf_log_fatal("connect() failed: %s", perf_strerror_r(errno, __s, sizeof(__s)));
+ }
+ }
+ sock.recvbuf = malloc(TCP_RECV_BUF_SIZE);
+ sock.at = 0;
+ sock.have_more = 0;
+ sock.sendbuf = malloc(TCP_SEND_BUF_SIZE);
+ if (!sock.recvbuf || !sock.sendbuf) {
+ perf_log_fatal("perf_net_opensocket() failed: unable to allocate buffers");
+ }
+ }
+
+ return sock;
+}
+
+ssize_t perf_net_recv(struct perf_net_socket* sock, void* buf, size_t len, int flags)
+{
+ switch (sock->mode) {
+ case sock_tls: {
+ ssize_t n;
+ uint16_t dnslen, dnslen2;
+
+ if (!sock->have_more) {
+ if (pthread_mutex_lock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_lock() failed");
+ }
+ if (!sock->is_ready) {
+ if (pthread_mutex_unlock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_unlock() failed");
+ }
+ errno = EAGAIN;
+ return -1;
+ }
+
+ n = SSL_read(sock->ssl, sock->recvbuf + sock->at, TCP_RECV_BUF_SIZE - sock->at);
+ if (n < 0) {
+ int err = SSL_get_error(sock->ssl, n);
+ if (pthread_mutex_unlock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_unlock() failed");
+ }
+ if (err == SSL_ERROR_WANT_READ) {
+ errno = EAGAIN;
+ } else {
+ errno = EBADF;
+ }
+ return -1;
+ }
+ if (pthread_mutex_unlock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_unlock() failed");
+ }
+
+ sock->at += n;
+ if (sock->at < 3) {
+ errno = EAGAIN;
+ return -1;
+ }
+ }
+
+ memcpy(&dnslen, sock->recvbuf, 2);
+ dnslen = ntohs(dnslen);
+ if (sock->at < dnslen + 2) {
+ errno = EAGAIN;
+ return -1;
+ }
+ memcpy(buf, sock->recvbuf + 2, len < dnslen ? len : dnslen);
+ memmove(sock->recvbuf, sock->recvbuf + 2 + dnslen, sock->at - 2 - dnslen);
+ sock->at -= 2 + dnslen;
+
+ if (sock->at > 2) {
+ memcpy(&dnslen2, sock->recvbuf, 2);
+ dnslen2 = ntohs(dnslen2);
+ if (sock->at >= dnslen2 + 2) {
+ sock->have_more = 1;
+ return dnslen;
+ }
+ }
+
+ sock->have_more = 0;
+ return dnslen;
+ }
+ case sock_tcp: {
+ ssize_t n;
+ uint16_t dnslen, dnslen2;
+
+ if (!sock->have_more) {
+ n = recv(sock->fd, sock->recvbuf + sock->at, TCP_RECV_BUF_SIZE - sock->at, flags);
+ if (n < 0) {
+ if (errno == ECONNRESET) {
+ // Treat connection reset like try again until reconnection features are in
+ errno = EAGAIN;
+ }
+ return n;
+ }
+ sock->at += n;
+ if (sock->at < 3) {
+ errno = EAGAIN;
+ return -1;
+ }
+ }
+
+ memcpy(&dnslen, sock->recvbuf, 2);
+ dnslen = ntohs(dnslen);
+ if (sock->at < dnslen + 2) {
+ errno = EAGAIN;
+ return -1;
+ }
+ memcpy(buf, sock->recvbuf + 2, len < dnslen ? len : dnslen);
+ memmove(sock->recvbuf, sock->recvbuf + 2 + dnslen, sock->at - 2 - dnslen);
+ sock->at -= 2 + dnslen;
+
+ if (sock->at > 2) {
+ memcpy(&dnslen2, sock->recvbuf, 2);
+ dnslen2 = ntohs(dnslen2);
+ if (sock->at >= dnslen2 + 2) {
+ sock->have_more = 1;
+ return dnslen;
+ }
+ }
+
+ sock->have_more = 0;
+ return dnslen;
+ }
+ default:
+ break;
+ }
+
+ return recv(sock->fd, buf, len, flags);
+}
+
+ssize_t perf_net_sendto(struct perf_net_socket* sock, const void* buf, size_t len, int flags,
+ const struct sockaddr* dest_addr, socklen_t addrlen)
+{
+ switch (sock->mode) {
+ case sock_tls: {
+ size_t send = len < TCP_SEND_BUF_SIZE - 2 ? len : (TCP_SEND_BUF_SIZE - 2);
+ // TODO: We only send what we can send, because we can't continue sending
+ uint16_t dnslen = htons(send);
+ ssize_t n;
+
+ memcpy(sock->sendbuf, &dnslen, 2);
+ memcpy(sock->sendbuf + 2, buf, send);
+ if (pthread_mutex_lock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_lock() failed");
+ }
+ n = SSL_write(sock->ssl, sock->sendbuf, send + 2);
+ if (n < 0) {
+ perf_log_warning("SSL_write(): %s", ERR_error_string(SSL_get_error(sock->ssl, n), 0));
+ errno = EBADF;
+ }
+ if (pthread_mutex_unlock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_unlock() failed");
+ }
+
+ if (n > 0 && n < send + 2) {
+ sock->sending = n;
+ sock->flags = flags;
+ memcpy(&sock->dest_addr, dest_addr, addrlen);
+ sock->addrlen = addrlen;
+ sock->is_ready = 0;
+ errno = EINPROGRESS;
+ return -1;
+ }
+
+ return n > 0 ? n - 2 : n;
+ }
+ case sock_tcp: {
+ size_t send = len < TCP_SEND_BUF_SIZE - 2 ? len : (TCP_SEND_BUF_SIZE - 2);
+ // TODO: We only send what we can send, because we can't continue sending
+ uint16_t dnslen = htons(send);
+ ssize_t n;
+
+ memcpy(sock->sendbuf, &dnslen, 2);
+ memcpy(sock->sendbuf + 2, buf, send);
+ n = sendto(sock->fd, sock->sendbuf, send + 2, flags, dest_addr, addrlen);
+
+ if (n > 0 && n < send + 2) {
+ sock->sending = n;
+ sock->flags = flags;
+ memcpy(&sock->dest_addr, dest_addr, addrlen);
+ sock->addrlen = addrlen;
+ sock->is_ready = 0;
+ errno = EINPROGRESS;
+ return -1;
+ }
+
+ return n > 0 ? n - 2 : n;
+ }
+ default:
+ break;
+ }
+ return sendto(sock->fd, buf, len, flags, dest_addr, addrlen);
+}
+
+int perf_net_close(struct perf_net_socket* sock)
+{
+ return close(sock->fd);
+}
+
+int perf_net_sockeq(struct perf_net_socket* sock_a, struct perf_net_socket* sock_b)
+{
+ return sock_a->fd == sock_b->fd;
+}
+
+enum perf_net_mode perf_net_parsemode(const char* mode)
+{
+ if (!strcmp(mode, "udp")) {
+ return sock_udp;
+ } else if (!strcmp(mode, "tcp")) {
+ return sock_tcp;
+ } else if (!strcmp(mode, "tls") || !strcmp(mode, "dot")) {
+ return sock_tls;
+ }
+
+ perf_log_warning("invalid socket mode");
+ perf_opt_usage();
+ exit(1);
+}
+
+int perf_net_sockready(struct perf_net_socket* sock, int pipe_fd, int64_t timeout)
+{
+ if (sock->is_ready) {
+ return 1;
+ }
+
+ switch (sock->mode) {
+ case sock_tls: {
+ int ret;
+
+ if (sock->sending) {
+ uint16_t dnslen;
+ ssize_t n;
+
+ memcpy(&dnslen, sock->sendbuf, 2);
+ dnslen = ntohs(dnslen);
+ if (pthread_mutex_lock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_lock() failed");
+ }
+ n = SSL_write(sock->ssl, sock->sendbuf + sock->sending, dnslen + 2 - sock->sending);
+ if (n < 1) {
+ if (n < 0) {
+ perf_log_warning("SSL_write(): %s", ERR_error_string(SSL_get_error(sock->ssl, n), 0));
+ errno = EBADF;
+ }
+ if (pthread_mutex_unlock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_unlock() failed");
+ }
+ return -1;
+ }
+ if (pthread_mutex_unlock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_unlock() failed");
+ }
+ sock->sending += n;
+ if (sock->sending < dnslen + 2) {
+ errno = EINPROGRESS;
+ return -1;
+ }
+ sock->sending = 0;
+ sock->is_ready = 1;
+ return 1;
+ }
+
+ if (!sock->is_ssl_ready) {
+ switch (perf_os_waituntilanywritable(sock, 1, pipe_fd, timeout)) {
+ case PERF_R_TIMEDOUT:
+ return -1;
+ case PERF_R_SUCCESS: {
+ int error = 0;
+ socklen_t len = (socklen_t)sizeof(error);
+
+ getsockopt(sock->fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
+ if (error != 0) {
+ if (error == EINPROGRESS
+#if EWOULDBLOCK != EAGAIN
+ || error == EWOULDBLOCK
+#endif
+ || error == EAGAIN) {
+ return 0;
+ }
+ return -1;
+ }
+ }
+ }
+ sock->is_ssl_ready = 1;
+ }
+
+ if (pthread_mutex_lock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_lock() failed");
+ }
+ ret = SSL_connect(sock->ssl);
+ if (!ret) {
+ perf_log_warning("SSL_connect(): %s", ERR_error_string(SSL_get_error(sock->ssl, ret), 0));
+ if (pthread_mutex_unlock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_unlock() failed");
+ }
+ return -1;
+ }
+ if (ret < 0) {
+ int err = SSL_get_error(sock->ssl, ret);
+ if (pthread_mutex_unlock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_unlock() failed");
+ }
+ if (err == SSL_ERROR_WANT_READ || err == SSL_ERROR_WANT_WRITE) {
+ return 0;
+ }
+ perf_log_warning("SSL_connect(): %s", ERR_error_string(err, 0));
+ return -1;
+ }
+ sock->is_ready = 1;
+ if (pthread_mutex_unlock(&sock->lock)) {
+ perf_log_fatal("pthread_mutex_unlock() failed");
+ }
+ return 1;
+ }
+ case sock_tcp:
+ if (sock->sending) {
+ uint16_t dnslen;
+ ssize_t n;
+
+ memcpy(&dnslen, sock->sendbuf, 2);
+ dnslen = ntohs(dnslen);
+ n = sendto(sock->fd, sock->sendbuf + sock->sending, dnslen + 2 - sock->sending, sock->flags, (struct sockaddr*)&sock->dest_addr, sock->addrlen);
+ if (n < 1) {
+ return -1;
+ }
+ sock->sending += n;
+ if (sock->sending < dnslen + 2) {
+ errno = EINPROGRESS;
+ return -1;
+ }
+ sock->sending = 0;
+ sock->is_ready = 1;
+ return 1;
+ }
+
+ switch (perf_os_waituntilanywritable(sock, 1, pipe_fd, timeout)) {
+ case PERF_R_TIMEDOUT:
+ return -1;
+ case PERF_R_SUCCESS: {
+ int error = 0;
+ socklen_t len = (socklen_t)sizeof(error);
+
+ getsockopt(sock->fd, SOL_SOCKET, SO_ERROR, (void*)&error, &len);
+ if (error != 0) {
+ if (error == EINPROGRESS
+#if EWOULDBLOCK != EAGAIN
+ || error == EWOULDBLOCK
+#endif
+ || error == EAGAIN) {
+ return 0;
+ }
+ return -1;
+ }
+ sock->is_ready = 1;
+ return 1;
+ }
+ }
+ break;
+ default:
+ break;
+ }
+
+ return -1;
+}
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