質問編集履歴
3
表記の改善
test
CHANGED
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File without changes
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test
CHANGED
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@@ -66,9 +66,7 @@
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66
66
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67
67
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var addr = getaddrinfo(address: address, port: port)
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68
68
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69
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-
print(addr.sin_addr ,",", addr.sin_port)
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70
69
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71
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-
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72
70
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73
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withUnsafeMutablePointer(to: &sendtext) { textp in
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72
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@@ -76,17 +74,11 @@
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76
74
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77
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withUnsafePointer(to: &addr){sockaddrInPtr in
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78
76
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79
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-
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80
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-
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81
77
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sockaddrInPtr.withMemoryRebound(to: sockaddr.self, capacity: 1){ sockaddrPtr in
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82
78
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83
79
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let check = sendto(fd, cstr, Int(strlen(sendtext)), 0, sockaddrPtr , socklen_t(MemoryLayout<sockaddr>.stride))
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84
80
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85
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-
print(check)
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81
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+
print(check)
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86
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-
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87
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-
print(sendtext)
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88
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-
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89
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-
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90
82
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91
83
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}
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92
84
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2
```ぬけ
test
CHANGED
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File without changes
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test
CHANGED
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@@ -21,6 +21,8 @@
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21
21
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###該当のソースコード
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22
22
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23
23
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//sockaddr_inを作る関数
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24
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+
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25
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+
```
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24
26
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25
27
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func getaddrinfo( address: String, port: CUnsignedShort) -> sockaddr_in{
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26
28
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1
ポインタの処理を書き直し、sockaddr_inの関数化を行いました。また、sendto()の戻り値の確認も行なった結果、正常に送信文字数が入っていました。
test
CHANGED
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@@ -1 +1 @@
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1
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-
Swift3 UDP Client
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1
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+
Swift3 UDP Client 指定ipにデータの送信ができない
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test
CHANGED
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@@ -20,29 +20,9 @@
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20
20
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21
21
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###該当のソースコード
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22
22
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23
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-
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23
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+
//sockaddr_inを作る関数
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24
24
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25
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-
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26
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-
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27
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-
udpSend(textToSend: "Hello World!", address: ipAddr, port: 6666)
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28
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-
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29
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-
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30
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-
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31
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-
func
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25
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+
func getaddrinfo( address: String, port: CUnsignedShort) -> sockaddr_in{
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32
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-
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33
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-
func htons(value: CUnsignedShort) -> CUnsignedShort {
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34
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-
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35
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-
return (value << 8) + (value >> 8);
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36
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-
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37
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-
}
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38
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-
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39
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-
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40
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-
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41
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-
let port: UInt16 = 6666
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42
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-
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43
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-
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44
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-
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45
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-
//let ipAdd = "192.168.1.81"
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46
26
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47
27
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let ipOcts = address.components(separatedBy: ".")
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48
28
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@@ -54,19 +34,13 @@
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54
34
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55
35
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return val | (u32 << shiftBits)
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56
36
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57
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-
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58
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-
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59
37
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}
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60
38
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39
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+
return sockaddr_in(
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61
40
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41
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+
sin_len: UInt8(MemoryLayout<sockaddr_in>.stride),
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62
42
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63
|
-
let fd = socket(AF_INET, SOCK_DGRAM, 0)
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64
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-
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65
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-
var addr = sockaddr_in(
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66
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-
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67
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-
sin_len: __uint8_t(MemoryLayout<sockaddr_in>.size),
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68
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-
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69
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-
sin_family:
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43
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+
sin_family: UInt8(AF_INET),
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70
44
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71
45
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sin_port: port.bigEndian,
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72
46
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@@ -76,27 +50,47 @@
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76
50
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77
51
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)
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78
52
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53
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+
}
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79
54
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80
55
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81
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-
// 以下が問題のsendto付近です。
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82
56
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83
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-
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57
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+
func udpSend(textToSend: String, address: String, port: CUnsignedShort) {
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84
58
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|
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85
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-
var ptr = unsafeBitCast(addr, to: sockaddr.self)
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86
59
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87
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-
withUnsafePointer(to: &ptr){addrptr -> Void in
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88
60
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61
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+
let fd = socket(AF_INET, SOCK_DGRAM, 0) // DGRAM makes it UDP
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62
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+
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63
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+
var sendtext = textToSend
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64
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+
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65
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+
var addr = getaddrinfo(address: address, port: port)
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66
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+
|
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67
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+
print(addr.sin_addr ,",", addr.sin_port)
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68
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+
|
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69
|
+
|
|
70
|
+
|
|
71
|
+
withUnsafeMutablePointer(to: &sendtext) { textp in
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72
|
+
|
|
73
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+
let cstr = UnsafeRawPointer(textp)
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74
|
+
|
|
75
|
+
withUnsafePointer(to: &addr){sockaddrInPtr in
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|
76
|
+
|
|
77
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+
|
|
78
|
+
|
|
79
|
+
sockaddrInPtr.withMemoryRebound(to: sockaddr.self, capacity: 1){ sockaddrPtr in
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|
80
|
+
|
|
89
|
-
sendto(fd, cstr, Int(strlen(
|
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81
|
+
let check = sendto(fd, cstr, Int(strlen(sendtext)), 0, sockaddrPtr , socklen_t(MemoryLayout<sockaddr>.stride))
|
|
82
|
+
|
|
83
|
+
print(check)
|
|
84
|
+
|
|
85
|
+
print(sendtext)
|
|
86
|
+
|
|
87
|
+
|
|
88
|
+
|
|
89
|
+
}
|
|
90
90
|
|
|
91
91
|
}
|
|
92
92
|
|
|
93
93
|
}
|
|
94
|
-
|
|
95
|
-
close(fd)
|
|
96
|
-
|
|
97
|
-
|
|
98
|
-
|
|
99
|
-
}
|
|
100
94
|
|
|
101
95
|
```
|
|
102
96
|
|