redefinition of `struct in6_addr' 的解决办法

本文介绍了在使用GCC编译过程中遇到的关于`struct in6_addr`等结构体重新定义的错误,并提供了解决方案,即将包含的头文件从`<linux/in6.h>`更改为`<netinet/in.h>`。

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gcc的时候报如下错误:

redefinition of `struct in6_addr'

redefinition of `struct sockaddr_in6'

redefinition of `struct ipv6_mreq'

解决办法:

将#include <linux/in6.h> 替换成 #include <netinet/in.h>


编译xdp_redirect.c,20个报错 In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:31:8: error: redefinition of 'in_addr' struct in_addr ^ /usr/include/linux/in.h:89:8: note: previous definition is here struct in_addr { ^ In file included from xdp_redirect.c:8: In file included from /usr/include/netinet/in.h:37: /usr/include/x86_64-linux-gnu/bits/in.h:150:8: error: redefinition of 'ip_mreqn' struct ip_mreqn ^ /usr/include/linux/in.h:180:8: note: previous definition is here struct ip_mreqn { ^ In file included from xdp_redirect.c:8: In file included from /usr/include/netinet/in.h:37: /usr/include/x86_64-linux-gnu/bits/in.h:158:8: error: redefinition of 'in_pktinfo' struct in_pktinfo ^ /usr/include/linux/in.h:251:8: note: previous definition is here struct in_pktinfo { ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:42:5: error: redefinition of enumerator 'IPPROTO_IP' IPPROTO_IP = 0, /* Dummy protocol for TCP. */ ^ /usr/include/linux/in.h:30:21: note: expanded from macro 'IPPROTO_IP' #define IPPROTO_IP IPPROTO_IP ^ /usr/include/linux/in.h:29:3: note: previous definition is here IPPROTO_IP = 0, /* Dummy protocol for TCP */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:44:5: error: redefinition of enumerator 'IPPROTO_ICMP' IPPROTO_ICMP = 1, /* Internet Control Message Protocol. */ ^ /usr/include/linux/in.h:32:23: note: expanded from macro 'IPPROTO_ICMP' #define IPPROTO_ICMP IPPROTO_ICMP ^ /usr/include/linux/in.h:31:3: note: previous definition is here IPPROTO_ICMP = 1, /* Internet Control Message Protocol */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:46:5: error: redefinition of enumerator 'IPPROTO_IGMP' IPPROTO_IGMP = 2, /* Internet Group Management Protocol. */ ^ /usr/include/linux/in.h:34:23: note: expanded from macro 'IPPROTO_IGMP' #define IPPROTO_IGMP IPPROTO_IGMP ^ /usr/include/linux/in.h:33:3: note: previous definition is here IPPROTO_IGMP = 2, /* Internet Group Management Protocol */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:48:5: error: redefinition of enumerator 'IPPROTO_IPIP' IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94). */ ^ /usr/include/linux/in.h:36:23: note: expanded from macro 'IPPROTO_IPIP' #define IPPROTO_IPIP IPPROTO_IPIP ^ /usr/include/linux/in.h:35:3: note: previous definition is here IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:50:5: error: redefinition of enumerator 'IPPROTO_TCP' IPPROTO_TCP = 6, /* Transmission Control Protocol. */ ^ /usr/include/linux/in.h:38:22: note: expanded from macro 'IPPROTO_TCP' #define IPPROTO_TCP IPPROTO_TCP ^ /usr/include/linux/in.h:37:3: note: previous definition is here IPPROTO_TCP = 6, /* Transmission Control Protocol */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:52:5: error: redefinition of enumerator 'IPPROTO_EGP' IPPROTO_EGP = 8, /* Exterior Gateway Protocol. */ ^ /usr/include/linux/in.h:40:22: note: expanded from macro 'IPPROTO_EGP' #define IPPROTO_EGP IPPROTO_EGP ^ /usr/include/linux/in.h:39:3: note: previous definition is here IPPROTO_EGP = 8, /* Exterior Gateway Protocol */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:54:5: error: redefinition of enumerator 'IPPROTO_PUP' IPPROTO_PUP = 12, /* PUP protocol. */ ^ /usr/include/linux/in.h:42:22: note: expanded from macro 'IPPROTO_PUP' #define IPPROTO_PUP IPPROTO_PUP ^ /usr/include/linux/in.h:41:3: note: previous definition is here IPPROTO_PUP = 12, /* PUP protocol */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:56:5: error: redefinition of enumerator 'IPPROTO_UDP' IPPROTO_UDP = 17, /* User Datagram Protocol. */ ^ /usr/include/linux/in.h:44:22: note: expanded from macro 'IPPROTO_UDP' #define IPPROTO_UDP IPPROTO_UDP ^ /usr/include/linux/in.h:43:3: note: previous definition is here IPPROTO_UDP = 17, /* User Datagram Protocol */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:58:5: error: redefinition of enumerator 'IPPROTO_IDP' IPPROTO_IDP = 22, /* XNS IDP protocol. */ ^ /usr/include/linux/in.h:46:22: note: expanded from macro 'IPPROTO_IDP' #define IPPROTO_IDP IPPROTO_IDP ^ /usr/include/linux/in.h:45:3: note: previous definition is here IPPROTO_IDP = 22, /* XNS IDP protocol */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:60:5: error: redefinition of enumerator 'IPPROTO_TP' IPPROTO_TP = 29, /* SO Transport Protocol Class 4. */ ^ /usr/include/linux/in.h:48:21: note: expanded from macro 'IPPROTO_TP' #define IPPROTO_TP IPPROTO_TP ^ /usr/include/linux/in.h:47:3: note: previous definition is here IPPROTO_TP = 29, /* SO Transport Protocol Class 4 */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:62:5: error: redefinition of enumerator 'IPPROTO_DCCP' IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol. */ ^ /usr/include/linux/in.h:50:23: note: expanded from macro 'IPPROTO_DCCP' #define IPPROTO_DCCP IPPROTO_DCCP ^ /usr/include/linux/in.h:49:3: note: previous definition is here IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:64:5: error: redefinition of enumerator 'IPPROTO_IPV6' IPPROTO_IPV6 = 41, /* IPv6 header. */ ^ /usr/include/linux/in.h:52:23: note: expanded from macro 'IPPROTO_IPV6' #define IPPROTO_IPV6 IPPROTO_IPV6 ^ /usr/include/linux/in.h:51:3: note: previous definition is here IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:66:5: error: redefinition of enumerator 'IPPROTO_RSVP' IPPROTO_RSVP = 46, /* Reservation Protocol. */ ^ /usr/include/linux/in.h:54:23: note: expanded from macro 'IPPROTO_RSVP' #define IPPROTO_RSVP IPPROTO_RSVP ^ /usr/include/linux/in.h:53:3: note: previous definition is here IPPROTO_RSVP = 46, /* RSVP Protocol */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:68:5: error: redefinition of enumerator 'IPPROTO_GRE' IPPROTO_GRE = 47, /* General Routing Encapsulation. */ ^ /usr/include/linux/in.h:56:22: note: expanded from macro 'IPPROTO_GRE' #define IPPROTO_GRE IPPROTO_GRE ^ /usr/include/linux/in.h:55:3: note: previous definition is here IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:70:5: error: redefinition of enumerator 'IPPROTO_ESP' IPPROTO_ESP = 50, /* encapsulating security payload. */ ^ /usr/include/linux/in.h:58:22: note: expanded from macro 'IPPROTO_ESP' #define IPPROTO_ESP IPPROTO_ESP ^ /usr/include/linux/in.h:57:3: note: previous definition is here IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */ ^ In file included from xdp_redirect.c:8: /usr/include/netinet/in.h:72:5: error: redefinition of enumerator 'IPPROTO_AH' IPPROTO_AH = 51, /* authentication header. */ ^ /usr/include/linux/in.h:60:21: note: expanded from macro 'IPPROTO_AH' #define IPPROTO_AH IPPROTO_AH ^ /usr/include/linux/in.h:59:3: note: previous definition is here IPPROTO_AH = 51, /* Authentication Header protocol */ ^ fatal error: too many errors emitted, stopping now [-ferror-limit=] 20 errors generated.
06-18
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