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// vim:sw=2:ai
/*
* Copyright (C) 2010 DeNA Co.,Ltd.. All rights reserved.
* See COPYRIGHT.txt for details.
*/
#include <stdexcept>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/un.h>
#include "socket.hpp"
#include "string_util.hpp"
#include "fatal.hpp"
namespace dena {
void
ignore_sigpipe()
{
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) {
fatal_abort("SIGPIPE SIG_IGN");
}
}
void
socket_args::set(const config& conf)
{
timeout = conf.get_int("timeout", 600);
listen_backlog = conf.get_int("listen_backlog", 256);
std::string node = conf.get_str("host", "");
std::string port = conf.get_str("port", "");
if (!node.empty() || !port.empty()) {
if (family == AF_UNIX || node == "/") {
set_unix_domain(port.c_str());
} else {
const char *nd = node.empty() ? 0 : node.c_str();
if (resolve(nd, port.c_str()) != 0) {
fatal_exit("getaddrinfo failed: " + node + ":" + port);
}
}
}
sndbuf = conf.get_int("sndbuf", 0);
rcvbuf = conf.get_int("rcvbuf", 0);
}
void
socket_args::set_unix_domain(const char *path)
{
family = AF_UNIX;
addr = sockaddr_storage();
addrlen = sizeof(sockaddr_un);
sockaddr_un *const ap = reinterpret_cast<sockaddr_un *>(&addr);
ap->sun_family = AF_UNIX;
strncpy(ap->sun_path, path, sizeof(ap->sun_path) - 1);
}
int
socket_args::resolve(const char *node, const char *service)
{
const int flags = (node == 0) ? AI_PASSIVE : 0;
auto_addrinfo ai;
addr = sockaddr_storage();
addrlen = 0;
const int r = ai.resolve(node, service, flags, family, socktype, protocol);
if (r != 0) {
return r;
}
memcpy(&addr, ai.get()->ai_addr, ai.get()->ai_addrlen);
addrlen = ai.get()->ai_addrlen;
return 0;
}
int
socket_set_options(auto_file& fd, const socket_args& args, std::string& err_r)
{
if (args.timeout != 0 && !args.nonblocking) {
struct timeval tv = { };
tv.tv_sec = args.timeout;
tv.tv_usec = 0;
if (setsockopt(fd.get(), SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) != 0) {
return errno_string("setsockopt SO_RCVTIMEO", errno, err_r);
}
tv.tv_sec = args.timeout;
tv.tv_usec = 0;
if (setsockopt(fd.get(), SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)) != 0) {
return errno_string("setsockopt SO_RCVTIMEO", errno, err_r);
}
}
if (args.nonblocking && fcntl(fd.get(), F_SETFL, O_NONBLOCK) != 0) {
return errno_string("fcntl O_NONBLOCK", errno, err_r);
}
if (args.sndbuf != 0) {
const int v = args.sndbuf;
if (setsockopt(fd.get(), SOL_SOCKET, SO_SNDBUF, &v, sizeof(v)) != 0) {
return errno_string("setsockopt SO_SNDBUF", errno, err_r);
}
}
if (args.rcvbuf != 0) {
const int v = args.rcvbuf;
if (setsockopt(fd.get(), SOL_SOCKET, SO_RCVBUF, &v, sizeof(v)) != 0) {
return errno_string("setsockopt SO_RCVBUF", errno, err_r);
}
}
return 0;
}
int
socket_open(auto_file& fd, const socket_args& args, std::string& err_r)
{
fd.reset(socket(args.family, args.socktype, args.protocol));
if (fd.get() < 0) {
return errno_string("socket", errno, err_r);
}
return socket_set_options(fd, args, err_r);
}
int
socket_connect(auto_file& fd, const socket_args& args, std::string& err_r)
{
int r = 0;
if ((r = socket_open(fd, args, err_r)) != 0) {
return r;
}
if (connect(fd.get(), reinterpret_cast<const sockaddr *>(&args.addr),
args.addrlen) != 0) {
if (!args.nonblocking || errno != EINPROGRESS) {
return errno_string("connect", errno, err_r);
}
}
return 0;
}
int
socket_bind(auto_file& fd, const socket_args& args, std::string& err_r)
{
fd.reset(socket(args.family, args.socktype, args.protocol));
if (fd.get() < 0) {
return errno_string("socket", errno, err_r);
}
if (args.reuseaddr) {
if (args.family == AF_UNIX) {
const sockaddr_un *const ap =
reinterpret_cast<const sockaddr_un *>(&args.addr);
if (unlink(ap->sun_path) != 0 && errno != ENOENT) {
return errno_string("unlink uds", errno, err_r);
}
} else {
int v = 1;
if (setsockopt(fd.get(), SOL_SOCKET, SO_REUSEADDR, &v, sizeof(v)) != 0) {
return errno_string("setsockopt SO_REUSEADDR", errno, err_r);
}
}
}
if (bind(fd.get(), reinterpret_cast<const sockaddr *>(&args.addr),
args.addrlen) != 0) {
return errno_string("bind", errno, err_r);
}
if (listen(fd.get(), args.listen_backlog) != 0) {
return errno_string("listen", errno, err_r);
}
if (args.nonblocking && fcntl(fd.get(), F_SETFL, O_NONBLOCK) != 0) {
return errno_string("fcntl O_NONBLOCK", errno, err_r);
}
return 0;
}
int
socket_accept(int listen_fd, auto_file& fd, const socket_args& args,
sockaddr_storage& addr_r, socklen_t& addrlen_r, std::string& err_r)
{
fd.reset(accept(listen_fd, reinterpret_cast<sockaddr *>(&addr_r),
&addrlen_r));
if (fd.get() < 0) {
return errno_string("accept", errno, err_r);
}
return socket_set_options(fd, args, err_r);
}
};
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