Revamped and more useful PPP node type, supporting multi-link PPP directly.
This is one piece of the grand unified PPP daemon concept, whereby using netgraph nodes enables PPP data to be handled completely in kernel land, while leaving negotiation/control to be handled by a single user land daemon, no matter what the link type(s). This is a safety checkin only; it compiles, but is utterly untested. Concept reviewed by: julian, brian
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/* Node type name and magic cookie */
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#define NG_PPP_NODE_TYPE "ppp"
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#define NGM_PPP_COOKIE 860635544
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#define NGM_PPP_COOKIE 940897792
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/* Maximum number of supported links */
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#define NG_PPP_MAX_LINKS 16
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/* Pseudo-link number representing the multi-link bundle */
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#define NG_PPP_BUNDLE_LINKNUM 0xffff
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/* Max allowable link latency (miliseconds) and bandwidth (bytes/second/10) */
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#define NG_PPP_MAX_LATENCY 1000 /* 1 second */
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#define NG_PPP_MAX_BANDWIDTH 125000 /* 10 Mbits / second */
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/* Hook names */
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#define NG_PPP_HOOK_DOWNLINK "downlink" /* downstream hook */
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#define NG_PPP_HOOK_BYPASS "bypass" /* any unhooked protocol */
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#define NG_PPP_HOOK_BYPASS "bypass" /* unknown protocols */
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#define NG_PPP_HOOK_COMPRESS "compress" /* outgoing compression */
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#define NG_PPP_HOOK_DECOMPRESS "decompress" /* incoming decompression */
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#define NG_PPP_HOOK_ENCRYPT "encrypt" /* outgoing encryption */
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#define NG_PPP_HOOK_DECRYPT "decrypt" /* incoming decryption */
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#define NG_PPP_HOOK_VJC_IP "vjc_ip" /* VJC raw IP */
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#define NG_PPP_HOOK_VJC_COMP "vjc_vjcomp" /* VJC compressed TCP */
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#define NG_PPP_HOOK_VJC_UNCOMP "vjc_vjuncomp" /* VJC uncompressed TCP */
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#define NG_PPP_HOOK_VJC_VJIP "vjc_vjip" /* VJC uncompressed IP */
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#define NG_PPP_HOOK_INET "inet" /* IP packet data */
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#define NG_PPP_HOOK_ATALK "atalk" /* AppleTalk packet data */
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#define NG_PPP_HOOK_IPX "ipx" /* IPX packet data */
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#define NG_PPP_HOOK_LINK_PREFIX "link" /* append decimal link number */
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/* Netgraph commands */
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enum {
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NGM_PPP_SET_PROTOCOMP = 1, /* takes an integer 0 or 1 */
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NGM_PPP_GET_STATS, /* returns struct ng_ppp_stat */
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NGM_PPP_CLR_STATS, /* clear stats */
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NGM_PPP_SET_CONFIG = 1, /* takes struct ng_ppp_bundle_config */
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NGM_PPP_GET_CONFIG, /* returns ng_ppp_bundle_config */
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NGM_PPP_GET_LINK_STATS, /* takes link #, returns stats struct */
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NGM_PPP_CLR_LINK_STATS, /* takes link #, clears link stats */
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};
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/* Statistics struct */
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struct ng_ppp_stat {
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u_int32_t xmitFrames; /* xmit frames on "downstream" */
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u_int32_t xmitOctets; /* xmit octets on "downstream" */
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u_int32_t recvFrames; /* recv frames on "downstream" */
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u_int32_t recvOctets; /* recv octets on "downstream" */
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u_int32_t badProto; /* frames with invalid protocol */
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u_int32_t unknownProto; /* frames sent to "unhooked" */
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/* Per-link config structure */
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struct ng_ppp_link_config {
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u_char enableLink; /* enable this link */
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u_char enableProtoComp;/* enable protocol field compression */
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u_int16_t mru; /* peer MRU */
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u_int32_t latency; /* link latency (in milliseconds) */
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u_int32_t bandwidth; /* link bandwidth (in bytes/second) */
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};
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/*
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* We recognize these hook names for some various PPP protocols. But we
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* always recognize the hook name "0xNNNN" for any protocol, including these.
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* So these are really just alias hook names.
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*/
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#define NG_PPP_HOOK_LCP "lcp" /* 0xc021 */
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#define NG_PPP_HOOK_IPCP "ipcp" /* 0x8021 */
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#define NG_PPP_HOOK_ATCP "atcp" /* 0x8029 */
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#define NG_PPP_HOOK_CCP "ccp" /* 0x80fd */
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#define NG_PPP_HOOK_ECP "ecp" /* 0x8053 */
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#define NG_PPP_HOOK_IP "ip" /* 0x0021 */
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#define NG_PPP_HOOK_VJCOMP "vjcomp" /* 0x002d */
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#define NG_PPP_HOOK_VJUNCOMP "vjuncomp" /* 0x002f */
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#define NG_PPP_HOOK_MP "mp" /* 0x003d */
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#define NG_PPP_HOOK_COMPD "compd" /* 0x00fd */
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#define NG_PPP_HOOK_CRYPTD "cryptd" /* 0x0053 */
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#define NG_PPP_HOOK_PAP "pap" /* 0xc023 */
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#define NG_PPP_HOOK_CHAP "chap" /* 0xc223 */
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#define NG_PPP_HOOK_LQR "lqr" /* 0xc025 */
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/* Node config structure */
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struct ng_ppp_node_config {
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u_int16_t mrru; /* multilink peer MRRU */
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u_char enableMultilink; /* enable multilink */
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u_char recvShortSeq; /* recv multilink short seq # */
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u_char xmitShortSeq; /* xmit multilink short seq # */
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u_char enableRoundRobin; /* xmit whole packets */
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u_char enableIP; /* enable IP data flow */
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u_char enableAtalk; /* enable AppleTalk data flow */
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u_char enableIPX; /* enable IPX data flow */
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u_char enableCompression; /* enable PPP compression */
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u_char enableDecompression; /* enable PPP decompression */
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u_char enableEncryption; /* enable PPP encryption */
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u_char enableDecryption; /* enable PPP decryption */
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u_char enableVJCompression; /* enable VJ compression */
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u_char enableVJDecompression; /* enable VJ decompression */
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struct ng_ppp_link_config /* per link config params */
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links[NG_PPP_MAX_LINKS];
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};
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/* Statistics struct for a link (or the bundle if NG_PPP_BUNDLE_LINKNUM) */
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struct ng_ppp_link_stat {
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u_int32_t xmitFrames; /* xmit frames on link */
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u_int32_t xmitOctets; /* xmit octets on link */
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u_int32_t recvFrames; /* recv frames on link */
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u_int32_t recvOctets; /* recv octets on link */
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u_int32_t badProtos; /* frames rec'd with bogus protocol */
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u_int32_t dupFragments; /* MP frames with duplicate seq # */
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};
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#endif /* _NETGRAPH_PPP_H_ */
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