24 lines
477 B
C
24 lines
477 B
C
#ifndef _IGMP_H
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#define _IGMP_H
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#define IGMP_QUERY 0x11
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#define IGMPv1_REPORT 0x12
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#define IGMPv2_REPORT 0x16
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#define IGMP_LEAVE 0x17
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#define GROUP_ALL_HOSTS 0xe0000001 /* 224.0.0.1 Host byte order */
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struct igmp {
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uint8_t type;
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uint8_t response_time;
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uint16_t chksum;
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in_addr group;
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} PACKED;
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struct igmp_ip_t { /* Format of an igmp ip packet */
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struct iphdr ip;
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uint8_t router_alert[4]; /* Router alert option */
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struct igmp igmp;
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} PACKED;
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#endif /* _IGMP_H */
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