1 6e527fbc 2005-02-13 devnull #include "std.h"
  2 6e527fbc 2005-02-13 devnull #include "dat.h"
  3 6e527fbc 2005-02-13 devnull 
  4 6e527fbc 2005-02-13 devnull Logbuf confbuf;
  5 6e527fbc 2005-02-13 devnull 
  6 6e527fbc 2005-02-13 devnull void
  7 6e527fbc 2005-02-13 devnull confirmread(Req *r)
  8 6e527fbc 2005-02-13 devnull {
  9 6e527fbc 2005-02-13 devnull 	lbread(&confbuf, r);
 10 6e527fbc 2005-02-13 devnull }
 11 6e527fbc 2005-02-13 devnull 
 12 6e527fbc 2005-02-13 devnull void
 13 6e527fbc 2005-02-13 devnull confirmflush(Req *r)
 14 6e527fbc 2005-02-13 devnull {
 15 6e527fbc 2005-02-13 devnull 	lbflush(&confbuf, r);
 16 6e527fbc 2005-02-13 devnull }
 17 6e527fbc 2005-02-13 devnull 
 18 6e527fbc 2005-02-13 devnull int
 19 6e527fbc 2005-02-13 devnull confirmwrite(char *s)
 20 6e527fbc 2005-02-13 devnull {
 21 6e527fbc 2005-02-13 devnull 	char *t, *ans;
 22 6e527fbc 2005-02-13 devnull 	int allow;
 23 6e527fbc 2005-02-13 devnull 	ulong tag;
 24 6e527fbc 2005-02-13 devnull 	Attr *a;
 25 6e527fbc 2005-02-13 devnull 	Conv *c;
 26 6e527fbc 2005-02-13 devnull 
 27 6e527fbc 2005-02-13 devnull 	a = _parseattr(s);
 28 6e527fbc 2005-02-13 devnull 	if(a == nil){
 29 6e527fbc 2005-02-13 devnull 		werrstr("bad attr");
 30 6e527fbc 2005-02-13 devnull 		return -1;
 31 6e527fbc 2005-02-13 devnull 	}
 32 6e527fbc 2005-02-13 devnull 	if((t = _strfindattr(a, "tag")) == nil){
 33 5f6612ba 2008-05-31 rsc 		flog("bad confirm write: no tag");
 34 6e527fbc 2005-02-13 devnull 		werrstr("no tag");
 35 6e527fbc 2005-02-13 devnull 		return -1;
 36 6e527fbc 2005-02-13 devnull 	}
 37 6e527fbc 2005-02-13 devnull 	tag = strtoul(t, 0, 0);
 38 6e527fbc 2005-02-13 devnull 	if((ans = _strfindattr(a, "answer")) == nil){
 39 5f6612ba 2008-05-31 rsc 		flog("bad confirm write: no answer");
 40 6e527fbc 2005-02-13 devnull 		werrstr("no answer");
 41 6e527fbc 2005-02-13 devnull 		return -1;
 42 6e527fbc 2005-02-13 devnull 	}
 43 6e527fbc 2005-02-13 devnull 	if(strcmp(ans, "yes") == 0)
 44 6e527fbc 2005-02-13 devnull 		allow = 1;
 45 6e527fbc 2005-02-13 devnull 	else if(strcmp(ans, "no") == 0)
 46 6e527fbc 2005-02-13 devnull 		allow = 0;
 47 6e527fbc 2005-02-13 devnull 	else{
 48 5f6612ba 2008-05-31 rsc 		flog("bad confirm write: bad answer");
 49 6e527fbc 2005-02-13 devnull 		werrstr("bad answer");
 50 6e527fbc 2005-02-13 devnull 		return -1;
 51 6e527fbc 2005-02-13 devnull 	}
 52 6e527fbc 2005-02-13 devnull 	for(c=conv; c; c=c->next){
 53 6e527fbc 2005-02-13 devnull 		if(tag == c->tag){
 54 6e527fbc 2005-02-13 devnull 			nbsendul(c->keywait, allow);
 55 6e527fbc 2005-02-13 devnull 			break;
 56 6e527fbc 2005-02-13 devnull 		}
 57 6e527fbc 2005-02-13 devnull 	}
 58 6e527fbc 2005-02-13 devnull 	if(c == nil){
 59 6e527fbc 2005-02-13 devnull 		werrstr("tag not found");
 60 6e527fbc 2005-02-13 devnull 		return -1;
 61 6e527fbc 2005-02-13 devnull 	}
 62 6e527fbc 2005-02-13 devnull 	return 0;
 63 6e527fbc 2005-02-13 devnull }
 64 6e527fbc 2005-02-13 devnull 
 65 6e527fbc 2005-02-13 devnull int
 66 6e527fbc 2005-02-13 devnull confirmkey(Conv *c, Key *k)
 67 6e527fbc 2005-02-13 devnull {
 68 5f6612ba 2008-05-31 rsc 	int ret;
 69 5f6612ba 2008-05-31 rsc 
 70 6e527fbc 2005-02-13 devnull 	if(*confirminuse == 0)
 71 6e527fbc 2005-02-13 devnull 		return -1;
 72 6e527fbc 2005-02-13 devnull 
 73 6e527fbc 2005-02-13 devnull 	lbappend(&confbuf, "confirm tag=%lud %A %N", c->tag, k->attr, k->privattr);
 74 5f6612ba 2008-05-31 rsc 	flog("confirm %A %N", k->attr, k->privattr);
 75 6e527fbc 2005-02-13 devnull 	c->state = "keyconfirm";
 76 5f6612ba 2008-05-31 rsc 	ret = recvul(c->keywait);
 77 5f6612ba 2008-05-31 rsc 	flog("confirm=%d %A %N", ret, k->attr, k->privattr);
 78 5f6612ba 2008-05-31 rsc 	return ret;
 79 6e527fbc 2005-02-13 devnull }
 80 6e527fbc 2005-02-13 devnull 
 81 6e527fbc 2005-02-13 devnull Logbuf needkeybuf;
 82 6e527fbc 2005-02-13 devnull 
 83 6e527fbc 2005-02-13 devnull void
 84 6e527fbc 2005-02-13 devnull needkeyread(Req *r)
 85 6e527fbc 2005-02-13 devnull {
 86 6e527fbc 2005-02-13 devnull 	lbread(&needkeybuf, r);
 87 6e527fbc 2005-02-13 devnull }
 88 6e527fbc 2005-02-13 devnull 
 89 6e527fbc 2005-02-13 devnull void
 90 6e527fbc 2005-02-13 devnull needkeyflush(Req *r)
 91 6e527fbc 2005-02-13 devnull {
 92 6e527fbc 2005-02-13 devnull 	lbflush(&needkeybuf, r);
 93 6e527fbc 2005-02-13 devnull }
 94 6e527fbc 2005-02-13 devnull 
 95 6e527fbc 2005-02-13 devnull int
 96 6e527fbc 2005-02-13 devnull needkeywrite(char *s)
 97 6e527fbc 2005-02-13 devnull {
 98 6e527fbc 2005-02-13 devnull 	char *t;
 99 6e527fbc 2005-02-13 devnull 	ulong tag;
100 6e527fbc 2005-02-13 devnull 	Attr *a;
101 6e527fbc 2005-02-13 devnull 	Conv *c;
102 6e527fbc 2005-02-13 devnull 
103 6e527fbc 2005-02-13 devnull 	a = _parseattr(s);
104 6e527fbc 2005-02-13 devnull 	if(a == nil){
105 6e527fbc 2005-02-13 devnull 		werrstr("empty write");
106 6e527fbc 2005-02-13 devnull 		return -1;
107 6e527fbc 2005-02-13 devnull 	}
108 6e527fbc 2005-02-13 devnull 	if((t = _strfindattr(a, "tag")) == nil){
109 6e527fbc 2005-02-13 devnull 		werrstr("no tag");
110 6e527fbc 2005-02-13 devnull 		freeattr(a);
111 6e527fbc 2005-02-13 devnull 		return -1;
112 6e527fbc 2005-02-13 devnull 	}
113 6e527fbc 2005-02-13 devnull 	tag = strtoul(t, 0, 0);
114 6e527fbc 2005-02-13 devnull 	for(c=conv; c; c=c->next)
115 6e527fbc 2005-02-13 devnull 		if(c->tag == tag){
116 6e527fbc 2005-02-13 devnull 			nbsendul(c->keywait, 0);
117 6e527fbc 2005-02-13 devnull 			break;
118 6e527fbc 2005-02-13 devnull 		}
119 6e527fbc 2005-02-13 devnull 	if(c == nil){
120 6e527fbc 2005-02-13 devnull 		werrstr("tag not found");
121 6e527fbc 2005-02-13 devnull 		freeattr(a);
122 6e527fbc 2005-02-13 devnull 		return -1;
123 6e527fbc 2005-02-13 devnull 	}
124 6e527fbc 2005-02-13 devnull 	freeattr(a);
125 6e527fbc 2005-02-13 devnull 	return 0;
126 6e527fbc 2005-02-13 devnull }
127 6e527fbc 2005-02-13 devnull 
128 6e527fbc 2005-02-13 devnull int
129 6e527fbc 2005-02-13 devnull needkey(Conv *c, Attr *a)
130 6e527fbc 2005-02-13 devnull {
131 e75dbb6a 2020-01-15 rsc 	ulong u;
132 e75dbb6a 2020-01-15 rsc 
133 6e527fbc 2005-02-13 devnull 	if(c == nil || *needkeyinuse == 0)
134 6e527fbc 2005-02-13 devnull 		return -1;
135 6e527fbc 2005-02-13 devnull 
136 6e527fbc 2005-02-13 devnull 	lbappend(&needkeybuf, "needkey tag=%lud %A", c->tag, a);
137 5f6612ba 2008-05-31 rsc 	flog("needkey %A", a);
138 e75dbb6a 2020-01-15 rsc 
139 e75dbb6a 2020-01-15 rsc 	// Note: This code used to "return nbrecvul(c->keywait)."
140 e75dbb6a 2020-01-15 rsc 	// In Jan 2020 we changed nbrecvul to match Plan 9 and
141 e75dbb6a 2020-01-15 rsc 	// the man page and return 0 on "no data available" instead
142 e75dbb6a 2020-01-15 rsc 	// of -1. This new code with an explicit nbrecv preserves the
143 e75dbb6a 2020-01-15 rsc 	// code's old semantics, distinguishing a sent 0 from "no data".
144 e75dbb6a 2020-01-15 rsc 	// That said, this code seems to return -1 unconditionally:
145 e75dbb6a 2020-01-15 rsc 	// the c->keywait channel is unbuffered, and the only sending
146 e75dbb6a 2020-01-15 rsc 	// to it is done with an nbsendul, which won't block waiting for
147 e75dbb6a 2020-01-15 rsc 	// a receiver. So there is no sender for nbrecv to find here.
148 e75dbb6a 2020-01-15 rsc 	if(nbrecv(c->keywait, &u) < 0)
149 e75dbb6a 2020-01-15 rsc 		return -1;
150 e75dbb6a 2020-01-15 rsc 	return u;
151 6e527fbc 2005-02-13 devnull }
152 6e527fbc 2005-02-13 devnull 
153 6e527fbc 2005-02-13 devnull int
154 6e527fbc 2005-02-13 devnull badkey(Conv *c, Key *k, char *msg, Attr *a)
155 6e527fbc 2005-02-13 devnull {
156 e75dbb6a 2020-01-15 rsc 	ulong u;
157 e75dbb6a 2020-01-15 rsc 
158 6e527fbc 2005-02-13 devnull 	if(c == nil || *needkeyinuse == 0)
159 6e527fbc 2005-02-13 devnull 		return -1;
160 6e527fbc 2005-02-13 devnull 
161 6e527fbc 2005-02-13 devnull 	lbappend(&needkeybuf, "badkey tag=%lud %A %N\n%s\n%A",
162 6e527fbc 2005-02-13 devnull 		c->tag, k->attr, k->privattr, msg, a);
163 5f6612ba 2008-05-31 rsc 	flog("badkey %A / %N / %s / %A",
164 5f6612ba 2008-05-31 rsc 		k->attr, k->privattr, msg, a);
165 e75dbb6a 2020-01-15 rsc 
166 e75dbb6a 2020-01-15 rsc 	// Note: This code used to "return nbrecvul(c->keywait)."
167 e75dbb6a 2020-01-15 rsc 	// In Jan 2020 we changed nbrecvul to match Plan 9 and
168 e75dbb6a 2020-01-15 rsc 	// the man page and return 0 on "no data available" instead
169 e75dbb6a 2020-01-15 rsc 	// of -1. This new code with an explicit nbrecv preserves the
170 e75dbb6a 2020-01-15 rsc 	// code's old semantics, distinguishing a sent 0 from "no data".
171 e75dbb6a 2020-01-15 rsc 	// That said, this code seems to return -1 unconditionally:
172 e75dbb6a 2020-01-15 rsc 	// the c->keywait channel is unbuffered, and the only sending
173 e75dbb6a 2020-01-15 rsc 	// to it is done with an nbsendul, which won't block waiting for
174 e75dbb6a 2020-01-15 rsc 	// a receiver. So there is no sender for nbrecv to find here.
175 e75dbb6a 2020-01-15 rsc 	if(nbrecv(c->keywait, &u) < 0)
176 e75dbb6a 2020-01-15 rsc 		return -1;
177 e75dbb6a 2020-01-15 rsc 	return u;
178 6e527fbc 2005-02-13 devnull }