{"id":542,"date":"2010-06-04T16:49:07","date_gmt":"2010-06-04T08:49:07","guid":{"rendered":"http:\/\/www.kumouse.com\/?p=542"},"modified":"2010-06-04T16:49:07","modified_gmt":"2010-06-04T08:49:07","slug":"%e7%bd%91%e7%bb%9c%e6%8e%a5%e5%8f%a3%e5%b1%82-%e4%bd%bf%e7%94%a8%e7%9a%84%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"https:\/\/www.kumouse.com\/?p=542","title":{"rendered":"\u7f51\u7edc\u63a5\u53e3\u5c42 \u4f7f\u7528\u7684\u6570\u636e\u7ed3\u6784"},"content":{"rendered":"<p>1. \u63a5\u53e3\u6570\u636e\u7ed3\u6784<\/p>\n<blockquote>\n<p>\/* netif.h &#8211; NIGET *\/<\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; NI_MAXHWA 14&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u4efb\u4f55\u786c\u4ef6\u6700\u5927\u5c3a\u5bf8 max size of any hardware*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \uff08\u7269\u7406\uff09\u7f51\u7edc\u5730\u5740 *\/<br \/>\n\t\tstruct&nbsp;&nbsp;&nbsp; hwa&nbsp;&nbsp;&nbsp; {&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* *\u786c\u4ef6\u5730\u5740&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ha_len;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u5730\u5740\u957f\u5ea6&nbsp;&nbsp;&nbsp; *\/<span style=\"font-size: 10px;\"><br \/>\n\t\t&nbsp;&nbsp;&nbsp; unsigned char&nbsp;&nbsp;&nbsp; ha_addr[NI_MAXHWA]; &nbsp;&nbsp;&nbsp; \/* \u5730\u5740&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t};<\/span><\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; NI_INQSZ&nbsp;&nbsp;&nbsp; 30&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u63a5\u53e3\u8f93\u5165\u961f\u5217\u5927\u5c0f&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; NETNLEN&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 30&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u7f51\u7edc\u540d\u79f0\u957f\u5ea6&nbsp;&nbsp;&nbsp; *\/<\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; NI_LOCAL&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u672c\u5730\u63a5\u53e3\u5e8f\u53f7index of local interface&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; NI_PRIMARY&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u4e3b\u8981\u63a5\u53e3\u5e8f\u53f7index of primary interface&nbsp;&nbsp;&nbsp; *\/<\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; NI_MADD&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u6dfb\u52a0\u591a\u64adadd multicast (ni_mcast)&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; NI_MDEL&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u5220\u9664\u591a\u64ad multicast (ni_mcast)&nbsp;&nbsp;&nbsp; *\/<\/p>\n<p>\t\t\/* \u63a5\u53e3\u72b6\u6001 *\/<\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; NIS_UP&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 0x1<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; NIS_DOWN&nbsp;&nbsp;&nbsp; 0x2<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; NIS_TESTING&nbsp;&nbsp;&nbsp; 0x3<\/p>\n<p>\t\t\/* \u7f51\u7edc\u63a5\u53e3\u7ed3\u6784 (one per interface)&nbsp;&nbsp;&nbsp; *\/<\/p>\n<p>\t\tstruct&nbsp;&nbsp;&nbsp; netif {&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u7f51\u7edc\u63a5\u53e3\u4fe1\u606f&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; char&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_name[NETNLEN]; \/* \u63a5\u53e3\u7684\u57df\u540d&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; char&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_state;&nbsp;&nbsp;&nbsp; \/* \u63a5\u53e3\u7684\u72b6\u6001 \u53d6\u4e0a\u8fb9\u7684\u4e09\u4e2a\u503c&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; IPaddr&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_ip;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u63a5\u53e3\u7684IP\u5730\u5740*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; IPaddr&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_net;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u63a5\u53e3\u7684\u7f51\u7edcIP\u5730\u5740&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; IPaddr&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_subnet;&nbsp;&nbsp;&nbsp; \/* \u5b50\u7f51\u7684IP\u5730\u5740&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; IPaddr&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_mask;&nbsp;&nbsp;&nbsp; \/* \u63a5\u53e3\u7684\u5b50\u7f51\u63a9\u7801&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; IPaddr&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_brc;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* IP\u5e7f\u64ad\u5730\u5740&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; IPaddr&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_nbrc;&nbsp;&nbsp;&nbsp; \/* IP\u7684\u7f51\u7edc\u5e7f\u64ad\u5730\u5740&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; unsigned int&nbsp;&nbsp;&nbsp; ni_mtu;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u6700\u5927\u4f20\u8f93\u5355\u5143\uff08\u5b57\u8282\uff09&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; unsigned int&nbsp;&nbsp;&nbsp; ni_hwtype;&nbsp;&nbsp;&nbsp; \/* \u786c\u4ef6\u7c7b\u578b (for ARP)&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct&nbsp;&nbsp;&nbsp; hwa&nbsp;&nbsp;&nbsp; ni_hwa;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u63a5\u53e3\u7684\u786c\u4ef6\u5730\u5740*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct&nbsp;&nbsp;&nbsp; hwa&nbsp;&nbsp;&nbsp; ni_hwb;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u786c\u4ef6\u5e7f\u64ad\u5730\u5740&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u591a\u64ad\u6dfb\u52a0\/\u5220\u9664\u51fd\u6570&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; (*ni_mcast)(int op,int dev,Eaddr hwa,IPaddr ipa);<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Bool&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_ivalid;&nbsp;&nbsp;&nbsp; \/* \u63a5\u53e3\u7684IP\u5730\u5740\u662f\u5426\u6709\u6548&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Bool&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_nvalid;&nbsp;&nbsp;&nbsp; \/* \u63a5\u53e3\u7684\u57df\u540d\u662f\u5426\u6709\u6548&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Bool&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_svalid;&nbsp;&nbsp;&nbsp; \/* \u5b50\u7f51\u7684IP\u5730\u5740\u662f\u5426\u6709\u6548&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_dev;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u8bbe\u5907\u63cf\u8ff0\u7b26&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_ipinq;&nbsp;&nbsp;&nbsp; \/*&nbsp; IP\u8f93\u5165\u961f\u5217&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_outq;&nbsp;&nbsp;&nbsp; \/* \uff08\u8bbe\u5907\uff09\u7684\u8f93\u51fa\u961f\u5217&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; \/* \u63a5\u53e3\u4fe1\u606f\u7ba1\u7406\u5e93- MIB *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; char&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *ni_descr;&nbsp;&nbsp;&nbsp; \/* \u786c\u4ef6\u7684\u6587\u5b57\u63cf\u8ff0 *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_mtype;&nbsp;&nbsp;&nbsp; \/* MIB\u7c7b\u578b&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_speed;&nbsp;&nbsp;&nbsp; \/* \u901f\u7387 bit\/s&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; char&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_admstate;&nbsp;&nbsp;&nbsp; \/* \u7ba1\u7406\u72b6\u6001 (NIS_*)*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_lastchange;&nbsp;&nbsp;&nbsp; \/* \u6700\u540e\u4e00\u4e2a\u72b6\u6001\u53d8\u5316 (1\/100 sec)*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_ioctets;&nbsp;&nbsp;&nbsp; \/* # \u6536\u5230\u7684\u5b57\u8282&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_iucast;&nbsp;&nbsp;&nbsp; \/* # \u6536\u5230\u7684\u5355\u64ad\u5b57\u8282&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_inucast;&nbsp;&nbsp;&nbsp; \/* # \u6536\u5230\u7684\u975e\u5355\u64ad\u5b57\u8282&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_idiscard;&nbsp;&nbsp;&nbsp; \/* # \u4e22\u5f03 &#8211; \u8f93\u51fa\u961f\u5217\u6ee1*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_ierrors;&nbsp;&nbsp;&nbsp; \/* # \u8f93\u5165\u5305\u9519\u8bef&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_iunkproto;&nbsp;&nbsp;&nbsp; \/* # in packets for unk. protos *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_ooctets;&nbsp;&nbsp;&nbsp; \/* # \u53d1\u9001\u7684\u5b57\u8282&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_oucast;&nbsp;&nbsp;&nbsp; \/* # \u53d1\u9001\u7684\u5355\u64ad\u5b57\u8282&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_onucast;&nbsp;&nbsp;&nbsp; \/* # \u53d1\u9001\u7684\u975e\u5355\u64ad\u5b57\u8282&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_odiscard;&nbsp;&nbsp;&nbsp; \/* # \u8f93\u51fa\u7684\u6570\u636e\u5305\u88ab\u4e22\u5f03&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_oerrors;&nbsp;&nbsp;&nbsp; \/* # \u53d1\u9001\u7684\u5305\u9519\u8bef&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_oqlen;&nbsp;&nbsp;&nbsp; \/* \u8f93\u51fa\u961f\u5217\u957f\u5ea6&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; long&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ni_maxreasm;&nbsp;&nbsp;&nbsp; \/* \u53ef\u4ee5\u91cd\u65b0\u7ec4\u88c5\u7684\u6700\u5927\u6570\u636e\u5305\u7684\u957f\u5ea6&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t};<\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; NIGET(ifn)&nbsp;&nbsp;&nbsp; ((struct ep *)deq(nif[ifn].ni_ipinq))<\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; NIF&nbsp;&nbsp;&nbsp; Neth+Noth+1&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* # of interfaces, +1 for local*\/<\/p>\n<p>\t\textern struct netif&nbsp;&nbsp;&nbsp; nif[];<\/p>\n<p>\t\tint netwrite(struct netif *, struct ep *, unsigned);<br \/>\n\t\t&nbsp;<\/p>\n<\/blockquote>\n<hr \/>\n<p>2. \u4ee5\u592a\u7f51\u7684\u57fa\u672c\u5b9a\u4e49<\/p>\n<blockquote>\n<p>\t\t\/* ether.h *\/<\/p>\n<p>\t\t\/* \u4ee5\u592a\u7f51\u7684\u5b9a\u4e49\u548c\u5e38\u91cf *\/<\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; EP_MAXMULTI&nbsp;&nbsp;&nbsp; &nbsp; 10&nbsp;&nbsp;&nbsp; \/* \u591a\u64ad\u5730\u5740\u8868\u7684\u5927\u5c0f&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; EP_MINLEN&nbsp;&nbsp;&nbsp; &nbsp; 60&nbsp;&nbsp;&nbsp; \/* \u6700\u5c0f\u6570\u636e\u5305\u957f\u5ea6&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EP_DLEN&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 1500&nbsp;&nbsp;&nbsp; \/* \u6570\u636e\u5b57\u6bb5\u957f\u5ea6&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EP_HLEN&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; 24&nbsp;&nbsp;&nbsp; \/* \u5934\u957f\u5ea6&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EP_CRC&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp; \/* \u6548\u68c0\u4f4d\u957f\u5ea6 ether CRC (trailer)&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EP_MAXLEN&nbsp;&nbsp;&nbsp; EP_HLEN+EP_DLEN<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EP_ALEN&nbsp;&nbsp;&nbsp; 6&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u7269\u7406\u5730\u5740\u7684\u5b57\u8282\u6570&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\ttypedef&nbsp;&nbsp;&nbsp; unsigned char&nbsp;&nbsp;&nbsp; Eaddr[EP_ALEN]; \/* \u7269\u7406\u5730\u5740&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EP_RETRY&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp; \/* number of times to retry xmit errors&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EP_BRC&nbsp;&nbsp;&nbsp; &quot;377377377377377377&quot;\/* \u4ee5\u592a\u7f51\u5e7f\u64ad\u5730\u5740&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define EP_RTO 300&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* time out in seconds for reads&nbsp;&nbsp;&nbsp; *\/<\/p>\n<p>\t\t#define EP_NUMRCV 16&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* number LANCE recv buffers (power 2)&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define EP_NUMRCVL2 4&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* log2 of the number of buffers&nbsp;&nbsp;&nbsp; *\/<\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; EPT_LOOP&nbsp;&nbsp;&nbsp; 0x0060&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* type: Loopback \u56de\u73af&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPT_ECHO&nbsp;&nbsp;&nbsp; 0x0200&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* type: Echo&nbsp;&nbsp;&nbsp; \u5e94\u7b54&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPT_PUP&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 0x0400&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* type: Xerox PUP&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPT_IP&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 0x0800&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* type: Internet Protocol&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPT_ARP&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 0x0806&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* type: ARP&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPT_RARP&nbsp;&nbsp;&nbsp; 0x8035&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* type: Reverse ARP&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<\/p>\n<p>\t\tstruct&nbsp;&nbsp;&nbsp; eh {&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u4ee5\u592a\u7f51\u62a5\u5934&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Eaddr&nbsp;&nbsp;&nbsp; eh_dst;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u76ee\u6807\u4e3b\u673a\u5730\u5740&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Eaddr&nbsp;&nbsp;&nbsp; eh_src;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u6e90\u4e3b\u673a\u5730\u5740&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; unsigned short&nbsp;&nbsp;&nbsp; eh_type;\/* \u4ee5\u592a\u7f51\u6570\u636e\u5305\u7c7b\u578b\uff08\u89c1\u4e0b\u6587\uff09&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t};<\/p>\n<p>\t\tstruct&nbsp;&nbsp;&nbsp; ep&nbsp;&nbsp;&nbsp; {&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u7ed3\u6784\u5b8c\u6574\u7684\u4ee5\u592a\u7f51\u6570\u636e\u5305*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; u_long&nbsp;&nbsp;&nbsp; ep_nexthop;&nbsp;&nbsp;&nbsp; \/* niput() uses this&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; short&nbsp;&nbsp;&nbsp; ep_ifn;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u539f\u63a5\u53e3\u5e8f\u53f7originating interface number*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; short&nbsp;&nbsp;&nbsp; ep_len;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u6570\u636e\u5305\u7684\u957f\u5ea6&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; short&nbsp;&nbsp;&nbsp; ep_order;&nbsp;&nbsp;&nbsp; \/* \u5b57\u8282\u987a\u5e8f (for debugging)&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct&nbsp;&nbsp;&nbsp; eh ep_eh;&nbsp;&nbsp;&nbsp; \/* \u4ee5\u592a\u7f51\u62a5\u5934&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; char&nbsp;&nbsp;&nbsp; ep_data[EP_DLEN];&nbsp;&nbsp;&nbsp; \/* \u6570\u636e&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t};<\/p>\n<p>\t\t\/* \u6570\u636e\u5305\u5b57\u8282\u987a\u5e8f\u7684\u5e38\u91cf\uff08\u8bbe\u7f6e\u65b9\u6cd5\u4e3b\u673a\u987a\u5e8f\uff09 *\/<\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; EPO_NET&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; \/* \u7f51\u7edc\u5c42 network layer&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPO_IP&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp; \/* level 1 protocols&#8230;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPO_ARP&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 2<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPO_RARP&nbsp;&nbsp;&nbsp; 2<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPO_ICMP&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp; \/* level 2 protocols&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPO_IGMP&nbsp;&nbsp;&nbsp; 4<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPO_TCP&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 4<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPO_UDP&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 4<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPO_OSPF&nbsp;&nbsp;&nbsp; 4<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPO_DNS&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp; \/* \u5e94\u7528\u534f\u8bae application protocols*\/<\/p>\n<p>\t\t\/* these allow us to pretend it&#39;s all one big happy structure *\/<\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; ep_dst&nbsp;&nbsp;&nbsp; ep_eh.eh_dst<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; ep_src&nbsp;&nbsp;&nbsp; ep_eh.eh_src<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; ep_type&nbsp;&nbsp;&nbsp; ep_eh.eh_type<\/p>\n<p>\t\t#if&nbsp;&nbsp;&nbsp; Noth &gt; 0<br \/>\n\t\t\/* this is for Othernet simulation *\/<\/p>\n<p>\t\tstruct&nbsp;&nbsp;&nbsp; otblk {<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Bool&nbsp;&nbsp;&nbsp; ot_valid;&nbsp;&nbsp;&nbsp; \/* these entries are valid?&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Eaddr&nbsp;&nbsp;&nbsp; ot_paddr;&nbsp;&nbsp;&nbsp; \/* the Othernet physical address&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Eaddr&nbsp;&nbsp;&nbsp; ot_baddr;&nbsp;&nbsp;&nbsp; \/* the Othernet broadcast address&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; ot_rpid;&nbsp;&nbsp;&nbsp; \/* id of process reading from othernet&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; ot_rsem;&nbsp;&nbsp;&nbsp; \/* mutex for reading from the othernet&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; ot_pdev;&nbsp;&nbsp;&nbsp; \/* Physical device devtab index&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; ot_intf;&nbsp;&nbsp;&nbsp; \/* the associate interface&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; char&nbsp;&nbsp;&nbsp; *ot_descr;&nbsp;&nbsp;&nbsp; \/* text description of the device&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t};<br \/>\n\t\t#endif&nbsp;&nbsp;&nbsp; \/* Noth *\/<\/p>\n<p>\n\t\t#define&nbsp;&nbsp;&nbsp; ETOUTQSZ&nbsp;&nbsp;&nbsp; 30<\/p>\n<p>\t\t\/* \u4ee5\u592a\u7f51\u63a7\u5236\u6a21\u5757\u7684\u63cf\u8ff0 *\/<\/p>\n<p>\t\tstruct&nbsp;&nbsp;&nbsp; etblk&nbsp;&nbsp;&nbsp; {<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; etxpending;&nbsp;&nbsp;&nbsp; \/* \u53f7\u7684\u6570\u636e\u5305\u7b49\u5f85\u8f93\u51fanumber of packets pending output*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; etrpending;&nbsp;&nbsp;&nbsp; \/* \u6b63\u5728\u7b49\u5f85\u5df2\u63a5\u65361 =&gt; a receive is pending already*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; etwtry;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u91cd\u8bd5num. of times to retry xmit errors&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; char&nbsp;&nbsp;&nbsp; *etwbuf;&nbsp;&nbsp;&nbsp; \/* \u5f53\u524d\u53d1\u9001\u7f13\u51b2\u533a\u7684\u6307\u9488&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; short&nbsp;&nbsp;&nbsp; etnextbuf;&nbsp;&nbsp;&nbsp; \/* \u68c0\u67e5\u7f13\u51b2\u533a\u5faa\u73affor checking buffers round robin&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#if&nbsp;&nbsp;&nbsp; Noth &gt; 0<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct&nbsp;&nbsp;&nbsp; otblk&nbsp;&nbsp;&nbsp; *etoth[Noth];&nbsp;&nbsp;&nbsp; \/* eaddr to oaddr translations&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#endif&nbsp;&nbsp;&nbsp; \/* Noth *\/<br \/>\n\t\t};<\/p>\n<p>\n\t\t\/* \u4ee5\u592a\u7f51\u529f\u80fd\u7684\u4ee3\u7801 *\/<\/p>\n<p>\t\t#define&nbsp;&nbsp;&nbsp; EPC_PROMON&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u6253\u5f00\u6df7\u6742\u6a21\u5f0f&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPC_PROMOFF&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u5173\u95ed\u6df7\u6742\u6a21\u5f0f&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPC_MADD&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u6dfb\u52a0\u591a\u64ad\u5730\u5740&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t#define&nbsp;&nbsp;&nbsp; EPC_MDEL&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/* \u5220\u9664\u591a\u64ad\u5730\u5740&nbsp;&nbsp;&nbsp; *\/<\/p>\n<p>\t\tstruct utdev {<br \/>\n\t\t&nbsp;&nbsp;&nbsp; unsigned int&nbsp;&nbsp;&nbsp; &nbsp;ud_iomem;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; unsigned int&nbsp;&nbsp;&nbsp; &nbsp;ud_iosize;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct devsw&nbsp;&nbsp;&nbsp; *ud_pdev;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Eaddr&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ud_paddr;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Eaddr&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ud_bcast;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; char&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *ud_descr;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ud_outq;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ud_ifnum;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ud_nextbuf;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ud_xpending;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ud_xmaddr;&nbsp;&nbsp;&nbsp; \/* \u53d1\u9001\u57fa\u5730\u7f13\u51b2\u533atransmit base buf #&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ud_wretry;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ud_rmin;&nbsp;&nbsp;&nbsp; \/* \u63a5\u6536\u73af\u5f62\u7f13\u51b2\u533a\u57fa\u5730\u5740receive ring buffer base addr*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ud_rmax;&nbsp;&nbsp;&nbsp; \/* \u73af\u5f62\u7f13\u51b2\u533a\u6700\u5927\u63a5\u6536\u5730\u5740receive ring buffer max addr&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t};<\/p>\n<p>\t\tstruct etdev {<br \/>\n\t\t&nbsp;&nbsp;&nbsp; unsigned int&nbsp;&nbsp;&nbsp; &nbsp;ed_iomem;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; unsigned int&nbsp;&nbsp;&nbsp; &nbsp;ed_iosize;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct devsw&nbsp;&nbsp;&nbsp; *ed_pdev;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Eaddr&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ed_paddr;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Eaddr&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ed_bcast;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; char&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *ed_descr;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ed_outq;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ed_ifnum;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ed_wretry;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct scb&nbsp;&nbsp;&nbsp; *ed_scb;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct cbl&nbsp;&nbsp;&nbsp; *ed_cbl;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct rfd&nbsp;&nbsp;&nbsp; *ed_rfd;&nbsp;&nbsp;&nbsp; \/* first in RFD ring&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct rfd&nbsp;&nbsp;&nbsp; *ed_rfdend;&nbsp;&nbsp;&nbsp; \/* last in RFDring&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct rbd&nbsp;&nbsp;&nbsp; *ed_rbd;&nbsp;&nbsp;&nbsp; \/* first in RBD ring&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct rbd&nbsp;&nbsp;&nbsp; *ed_rbdend;&nbsp;&nbsp;&nbsp; \/* last in RBD ring&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; struct tbd&nbsp;&nbsp;&nbsp; *ed_tbd;&nbsp;&nbsp;&nbsp; \/* transmit buffer descriptor&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; unsigned char&nbsp;&nbsp;&nbsp; *ed_xmbuf;&nbsp;&nbsp;&nbsp; \/* transmit buffer base&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; unsigned char&nbsp;&nbsp;&nbsp; &nbsp;ed_irq;&nbsp;&nbsp;&nbsp; \/* SIRQ reg value&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ed_mcc;&nbsp;&nbsp;&nbsp; \/* # valid mca&#39;s&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; Eaddr&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;ed_mca[EP_MAXMULTI]; \/* multicast addr. table&nbsp;&nbsp;&nbsp; *\/<br \/>\n\t\t\/* XXX *\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ed_xpending;<br \/>\n\t\t};<\/p>\n<p>\t\textern struct utdev&nbsp;&nbsp;&nbsp; ue[];<br \/>\n\t\textern struct etdev&nbsp;&nbsp;&nbsp; ee[];<br \/>\n\t\t&nbsp;<\/p>\n<\/blockquote>\n<hr \/>\n<p>3. \u4f20\u5165\u5206\u7ec4\u7684\u591a\u8def\u5206\u89e3<\/p>\n<blockquote>\n<p>\n\t\t\/* ni_in.c &#8211; ni_in *\/<\/p>\n<p>\t\t#include &lt;conf.h&gt;<br \/>\n\t\t#include &lt;kernel.h&gt;<br \/>\n\t\t#include &lt;network.h&gt;<\/p>\n<p>\t\t#include &lt;ospf.h&gt;<\/p>\n<p>\t\tint arp_in(struct netif *, struct ep *);<br \/>\n\t\tint rarp_in(struct netif *, struct ep *);<br \/>\n\t\tint ip_in(struct netif *, struct ep *);<\/p>\n<p>\t\t\/*&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;<br \/>\n\t\t&nbsp;*&nbsp; ni_in &#8211; network interface input function \u7f51\u7edc\u63a5\u53e3\u8f93\u5165\u529f\u80fd<br \/>\n\t\t&nbsp;*&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;<br \/>\n\t\t&nbsp;*\/<br \/>\n\t\tint<br \/>\n\t\tni_in(struct netif *pni, struct ep *pep, unsigned len)<br \/>\n\t\t{<br \/>\n\t\t&nbsp;&nbsp;&nbsp; int&nbsp;&nbsp;&nbsp; rv;<\/p>\n<p>\t\t&nbsp;&nbsp;&nbsp; pep-&gt;ep_ifn = pni &#8211; &amp;nif[0];&nbsp;&nbsp;&nbsp; \/* \u8bb0\u5f55\u539f\u63a5\u53e3\u5e8f\u53f7 # *\/<\/p>\n<p>\t\t&nbsp;&nbsp;&nbsp; pni-&gt;ni_ioctets += len;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/*\u6536\u5230\u7684\u5b57\u8282\u7d2f\u52a0*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; if (!memcmp(pni-&gt;ni_hwa.ha_addr, pep-&gt;ep_dst, EP_ALEN))<br \/>\n\t\t&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; pni-&gt;ni_iucast++; \/*\u6bd4\u8f83\u5e27\u7684\u76ee\u7684\u5730\u5740\u4e0e\u63a5\u53e3\u7684\u7269\u7406\u5730\u5740\uff0c\u76f8\u540c\u5219\u5355\u64ad\u5b57\u8282\u7d2f\u52a0*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; else<br \/>\n\t\t&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; pni-&gt;ni_inucast++;&nbsp;&nbsp;&nbsp; \/*\u975e\u5355\u64ad\u5b57\u8282\u7d2f\u52a0*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; switch (pep-&gt;ep_type) {&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; \/*\u5206\u7c7b*\/<br \/>\n\t\t&nbsp;&nbsp;&nbsp; case EPT_ARP:&nbsp;&nbsp;&nbsp; rv = arp_in(pni, pep);&nbsp;&nbsp;&nbsp; break;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; case EPT_RARP:&nbsp;&nbsp;&nbsp; rv = rarp_in(pni, pep);&nbsp;&nbsp;&nbsp; break;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; case EPT_IP:&nbsp;&nbsp;&nbsp; rv = ip_in(pni, pep);&nbsp;&nbsp;&nbsp; break;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; default:<br \/>\n\t\t&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; pni-&gt;ni_iunkproto++;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; freebuf(pep);<br \/>\n\t\t&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; rv = OK;<br \/>\n\t\t&nbsp;&nbsp;&nbsp; }<br \/>\n\t\t&nbsp;&nbsp;&nbsp; return rv;<br \/>\n\t\t}<\/p>\n<p>\t\textern&nbsp;&nbsp;&nbsp; struct&nbsp;&nbsp;&nbsp; etblk&nbsp;&nbsp;&nbsp; eth[];<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>1. \u63a5\u53e3\u6570\u636e\u7ed3\u6784 \/* netif.h &#8211; NIGET *\/ #define&nbsp;&#038;nbs [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-542","post","type-post","status-publish","format-standard","hentry","category-linux-c"],"_links":{"self":[{"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/posts\/542","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=542"}],"version-history":[{"count":0,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/posts\/542\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.kumouse.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=542"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=542"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=542"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}