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devip: reject bad numeric ports (such as 9fs -> 9)

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This commit is contained in:
cinap_lenrek 2019-04-14 03:22:05 +02:00
parent 810aed76a5
commit 83c7a727e0
1 changed files with 15 additions and 8 deletions
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19
sys/src/9/ip/devip.c
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@ -857,7 +857,11 @@ setladdrport(Conv* c, char* str, int announcing)
return setluniqueport(c, 0);
}
lport = atoi(p);
str = p;
lport = strtol(str, &p, 10);
if(p <= str || strchr("!", *p) == nil)
return "bad numeric port";
if(lport <= 0)
rv = setlport(c);
else
@ -874,14 +878,17 @@ setraddrport(Conv* c, char* str)
if(p == nil)
return "malformed address";
*p++ = 0;
if (parseip(c->raddr, str) == -1)
if(parseip(c->raddr, str) == -1)
return Ebadip;
c->rport = atoi(p);
p = strchr(p, '!');
if(p){
str = p;
c->rport = strtol(str, &p, 10);
if(p <= str || strchr("!", *p) == nil)
return "bad numeric port";
if(strstr(p, "!r") != nil)
c->restricted = 1;
}
return nil;
}