Dlaczego kompilator wywala mi błędy?

Question

Cześć, dlaczego kompilator mówi mi, że redefiniuję  między innymi strukturę  sockaddr skoro normalnie używam jej w innej strukturze tak jak w przykładzie. Co robię nie tak, bo wszystko wydaje mi się tutaj poprawne.

Kod:

/*
	Initialise Winsock
*/

#include<stdio.h>
#include <stdint.h>
#include<winsock2.h>

struct addrinfo {
        int              ai_flags;     // AI_PASSIVE, AI_CANONNAME, etc.
        int              ai_family;    // AF_INET, AF_INET6, AF_UNSPEC
        int              ai_socktype;  // SOCK_STREAM, SOCK_DGRAM
        int              ai_protocol;  // use 0 for "any"
        size_t           ai_addrlen;   // size of ai_addr in bytes
        struct sockaddr *ai_addr;      // struct sockaddr_in or _in6
        char            *ai_canonname; // full canonical hostname

        struct addrinfo *ai_next;      // linked list, next node
    };

struct sockaddr {
        unsigned short    sa_family;    // address family, AF_xxx
        char              sa_data[14];  // 14 bytes of protocol address
    };

struct sockaddr_in {
        short int          sin_family;  // Address family, AF_INET
        unsigned short int sin_port;    // Port number
        struct in_addr     sin_addr;    // Internet address
        unsigned char      sin_zero[8]; // Same size as struct sockaddr
    };

struct in_addr {
        uint32_t s_addr; // that's a 32-bit int (4 bytes)
    };

struct sockaddr_in6 {
        uint16_t       sin6_family;   // address family, AF_INET6
        uint16_t       sin6_port;     // port number, Network Byte Order
        uint32_t       sin6_flowinfo; // IPv6 flow information
        struct in6_addr sin6_addr;     // IPv6 address
        uint32_t       sin6_scope_id; // Scope ID
    };

struct in6_addr {
        unsigned char   s6_addr[16];   // IPv6 address
    };

struct sockaddr_storage {
        sa_family_t  ss_family;     // address family

        // all this is padding, implementation specific, ignore it:
        char      __ss_pad1[_SS_PAD1SIZE];
        int64_t   __ss_align;
        char      __ss_pad2[_SS_PAD2SIZE];
    };

int main(int argc , char *argv[])
{
	WSADATA wsa;

	printf("\nInitialising Winsock...");
	if (WSAStartup(MAKEWORD(2,2),&wsa) != 0)
	{
		printf("Failed. Error Code : %d",WSAGetLastError());
		return 1;
	}

	printf("Initialised.");
   

	return 0;
}

Błąd:

||=== Build: Release in basicSocket (compiler: GNU GCC Compiler) ===|
D:\Networking in C\basicSocket\main.c|21|error: redefinition of 'struct sockaddr'|
D:\Program Files\CodeBlocks\MinGW\x86_64-w64-mingw32\include\psdk_inc\_ip_types.h|70|note: originally defined here|
D:\Networking in C\basicSocket\main.c|26|error: redefinition of 'struct sockaddr_in'|
D:\Program Files\CodeBlocks\MinGW\x86_64-w64-mingw32\include\psdk_inc\_ip_types.h|75|note: originally defined here|
D:\Networking in C\basicSocket\main.c|33|error: redefinition of 'struct in_addr'|
D:\Program Files\CodeBlocks\MinGW\x86_64-w64-mingw32\include\inaddr.h|17|note: originally defined here|
D:\Networking in C\basicSocket\main.c|34|error: expected ':', ',', ';', '}' or '__attribute__' before '.' token|
D:\Networking in C\basicSocket\main.c|41|error: field 'sin6_addr' has incomplete type|
D:\Networking in C\basicSocket\main.c|49|error: redefinition of 'struct sockaddr_storage'|
D:\Program Files\CodeBlocks\MinGW\x86_64-w64-mingw32\include\winsock2.h|260|note: originally defined here|
D:\Networking in C\basicSocket\main.c|50|error: unknown type name 'sa_family_t'|
||=== Build failed: 7 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|

 

Answer 1

Bo robisz to co Ci mówi. Te struktury istnieją w plikach nagłówkowych które dodałeś. Usuń kod od lini 8 do 57, a program powinien zbudować się poprawnie(ewentualnie mogą być problemy z linkowaniem jak nie dodałeś biblioteki).

Comments

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