117 lines
2.0 KiB
C
117 lines
2.0 KiB
C
#include <u.h>
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#include <libc.h>
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#include <auth.h>
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#include "authlocal.h"
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static struct {
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char *verb;
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int val;
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} tab[] = {
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"ok", ARok,
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"done", ARdone,
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"error", ARerror,
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"needkey", ARneedkey,
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"badkey", ARbadkey,
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"phase", ARphase,
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"toosmall", ARtoosmall,
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"error", ARerror,
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};
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static int
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classify(char *buf, uint n, AuthRpc *rpc)
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{
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int i, len;
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for(i=0; i<nelem(tab); i++){
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len = strlen(tab[i].verb);
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if(n >= len && memcmp(buf, tab[i].verb, len) == 0 && (n==len || buf[len]==' ')){
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if(n==len){
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rpc->narg = 0;
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rpc->arg = "";
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}else{
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rpc->narg = n - (len+1);
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rpc->arg = (char*)buf+len+1;
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}
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return tab[i].val;
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}
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}
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werrstr("malformed rpc response: %s", buf);
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return ARrpcfailure;
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}
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AuthRpc*
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auth_allocrpc(int afd)
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{
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AuthRpc *rpc;
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rpc = mallocz(sizeof(*rpc), 1);
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if(rpc == nil)
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return nil;
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rpc->afd = afd;
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return rpc;
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}
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void
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auth_freerpc(AuthRpc *rpc)
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{
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free(rpc);
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}
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uint
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auth_rpc(AuthRpc *rpc, char *verb, void *a, int na)
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{
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int l, n, type;
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char *f[4];
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l = strlen(verb);
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if(na+l+1 > AuthRpcMax){
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werrstr("rpc too big");
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return ARtoobig;
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}
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memmove(rpc->obuf, verb, l);
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rpc->obuf[l] = ' ';
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memmove(rpc->obuf+l+1, a, na);
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if((n=write(rpc->afd, rpc->obuf, l+1+na)) != l+1+na){
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if(n >= 0)
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werrstr("auth_rpc short write");
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return ARrpcfailure;
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}
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if((n=read(rpc->afd, rpc->ibuf, AuthRpcMax)) < 0)
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return ARrpcfailure;
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rpc->ibuf[n] = '\0';
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/*
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* Set error string for good default behavior.
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*/
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switch(type = classify(rpc->ibuf, n, rpc)){
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default:
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werrstr("unknown rpc type %d (bug in auth_rpc.c)", type);
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break;
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case ARok:
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break;
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case ARrpcfailure:
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break;
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case ARerror:
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if(rpc->narg == 0)
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werrstr("unspecified rpc error");
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else
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werrstr("%s", rpc->arg);
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break;
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case ARneedkey:
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werrstr("needkey %s", rpc->arg);
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break;
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case ARbadkey:
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if(getfields(rpc->arg, f, nelem(f), 0, "\n") < 2)
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werrstr("badkey %s", rpc->arg);
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else
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werrstr("badkey %s", f[1]);
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break;
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case ARphase:
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werrstr("phase error %s", rpc->arg);
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break;
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}
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return type;
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}
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