redefinition of `struct in6_addr' 的解决办法

最新推荐文章于 2025-06-23 16:47:09 发布
最新推荐文章于 2025-06-23 16:47:09 发布
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分类专栏： Bug
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本文链接：https://blog.youkuaiyun.com/xc889078/article/details/8796920
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>


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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. */ ^ 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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: 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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.
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