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Retrieve correct error messages on Windows

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For sockets functions, Windows does not store error codes in errno, so
perror() does not print any error. Use WSAGetLastError() instead.

Refs #2624 <https://github.com/Genymobile/scrcpy/issues/2624>
This commit is contained in:
Romain Vimont 2021-09-09 18:07:38 +02:00
parent 4d6dd9d281
commit 1d1c9f36f4
1 changed files with 22 additions and 6 deletions
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28
app/src/util/net.c
View file

@ -19,11 +19,27 @@
typedef struct in_addr IN_ADDR;
#endif
static void
net_perror(const char *s) {
#ifdef _WIN32
int error = WSAGetLastError();
char *wsa_message;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(char *) &wsa_message, 0, NULL);
// no explicit '\n', wsa_message already contains a trailing '\n'
fprintf(stderr, "%s: [%d] %s", s, error, wsa_message);
LocalFree(wsa_message);
#else
perror(s);
#endif
}
socket_t
net_connect(uint32_t addr, uint16_t port) {
socket_t sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == INVALID_SOCKET) {
perror("socket");
net_perror("socket");
return INVALID_SOCKET;
}
@ -33,7 +49,7 @@ net_connect(uint32_t addr, uint16_t port) {
sin.sin_port = htons(port);
if (connect(sock, (SOCKADDR *) &sin, sizeof(sin)) == SOCKET_ERROR) {
perror("connect");
net_perror("connect");
net_close(sock);
return INVALID_SOCKET;
}
@ -45,14 +61,14 @@ socket_t
net_listen(uint32_t addr, uint16_t port, int backlog) {
socket_t sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == INVALID_SOCKET) {
perror("socket");
net_perror("socket");
return INVALID_SOCKET;
}
int reuse = 1;
if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const void *) &reuse,
sizeof(reuse)) == -1) {
perror("setsockopt(SO_REUSEADDR)");
net_perror("setsockopt(SO_REUSEADDR)");
}
SOCKADDR_IN sin;
@ -61,13 +77,13 @@ net_listen(uint32_t addr, uint16_t port, int backlog) {
sin.sin_port = htons(port);
if (bind(sock, (SOCKADDR *) &sin, sizeof(sin)) == SOCKET_ERROR) {
perror("bind");
net_perror("bind");
net_close(sock);
return INVALID_SOCKET;
}
if (listen(sock, backlog) == SOCKET_ERROR) {
perror("listen");
net_perror("listen");
net_close(sock);
return INVALID_SOCKET;
}