| James Kuszmaul | 82f6c04 | 2021-01-17 11:30:16 -0800 | [diff] [blame^] | 1 | /** |
| 2 | * @file sockopt.c Networking socket options |
| 3 | * |
| 4 | * Copyright (C) 2010 Creytiv.com |
| 5 | */ |
| 6 | #ifdef HAVE_UNISTD_H |
| 7 | #include <unistd.h> |
| 8 | #endif |
| 9 | #include <fcntl.h> |
| 10 | #include <re_types.h> |
| 11 | #include <re_fmt.h> |
| 12 | #include <re_net.h> |
| 13 | |
| 14 | |
| 15 | #define DEBUG_MODULE "sockopt" |
| 16 | #define DEBUG_LEVEL 5 |
| 17 | #include <re_dbg.h> |
| 18 | |
| 19 | |
| 20 | /** Platform independent buffer type cast */ |
| 21 | #ifdef WIN32 |
| 22 | #define BUF_CAST (char *) |
| 23 | #else |
| 24 | #define BUF_CAST |
| 25 | #endif |
| 26 | |
| 27 | |
| 28 | /** |
| 29 | * Set socket option blocking or non-blocking |
| 30 | * |
| 31 | * @param fd Socket file descriptor |
| 32 | * @param blocking true for blocking, false for non-blocking |
| 33 | * |
| 34 | * @return 0 if success, otherwise errorcode |
| 35 | */ |
| 36 | int net_sockopt_blocking_set(int fd, bool blocking) |
| 37 | { |
| 38 | #ifdef WIN32 |
| 39 | unsigned long noblock = !blocking; |
| 40 | int err = 0; |
| 41 | |
| 42 | if (0 != ioctlsocket(fd, FIONBIO, &noblock)) { |
| 43 | err = WSAGetLastError(); |
| 44 | DEBUG_WARNING("nonblock set: fd=%d err=%d (%m)\n", |
| 45 | fd, err, err); |
| 46 | } |
| 47 | return err; |
| 48 | #else |
| 49 | int flags; |
| 50 | int err = 0; |
| 51 | |
| 52 | flags = fcntl(fd, F_GETFL); |
| 53 | if (-1 == flags) { |
| 54 | err = errno; |
| 55 | DEBUG_WARNING("sockopt set: fnctl F_GETFL: (%m)\n", err); |
| 56 | goto out; |
| 57 | } |
| 58 | |
| 59 | if (blocking) |
| 60 | flags &= ~O_NONBLOCK; |
| 61 | else |
| 62 | flags |= O_NONBLOCK; |
| 63 | |
| 64 | if (-1 == fcntl(fd, F_SETFL, flags)) { |
| 65 | err = errno; |
| 66 | DEBUG_WARNING("sockopt set: fcntl F_SETFL non-block (%m)\n", |
| 67 | err); |
| 68 | } |
| 69 | |
| 70 | out: |
| 71 | return err; |
| 72 | #endif |
| 73 | } |
| 74 | |
| 75 | |
| 76 | /** |
| 77 | * Set socket option to reuse address and port |
| 78 | * |
| 79 | * @param fd Socket file descriptor |
| 80 | * @param reuse true for reuse, false for no reuse |
| 81 | * |
| 82 | * @return 0 if success, otherwise errorcode |
| 83 | */ |
| 84 | int net_sockopt_reuse_set(int fd, bool reuse) |
| 85 | { |
| 86 | int r = reuse; |
| 87 | |
| 88 | #ifdef SO_REUSEADDR |
| 89 | if (-1 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, |
| 90 | BUF_CAST &r, sizeof(r))) { |
| 91 | DEBUG_WARNING("SO_REUSEADDR: %m\n", errno); |
| 92 | return errno; |
| 93 | } |
| 94 | #endif |
| 95 | |
| 96 | #ifdef SO_REUSEPORT |
| 97 | if (-1 == setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, |
| 98 | BUF_CAST &r, sizeof(r))) { |
| 99 | DEBUG_INFO("SO_REUSEPORT: %m\n", errno); |
| 100 | return errno; |
| 101 | } |
| 102 | #endif |
| 103 | |
| 104 | #if !defined(SO_REUSEADDR) && !defined(SO_REUSEPORT) |
| 105 | (void)r; |
| 106 | (void)fd; |
| 107 | (void)reuse; |
| 108 | return ENOSYS; |
| 109 | #else |
| 110 | return 0; |
| 111 | #endif |
| 112 | } |