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Curl_inet_ntop: always check the return code

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Reported-by: Siva Sivaraman
Fixes #5412
Closes #5597
This commit is contained in:
Daniel Stenberg 2020-06-24 01:13:04 +02:00
parent 550bcdd442
commit d2baa502fc
No known key found for this signature in database
GPG Key ID: 5CC908FDB71E12C2
2 changed files with 13 additions and 7 deletions
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7
lib/ftp.c
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@ -1043,6 +1043,7 @@ static CURLcode ftp_state_use_port(struct connectdata *conn,
} /* data->set.ftpport */ } /* data->set.ftpport */
if(!host) { if(!host) {
const char *r;
/* not an interface and not a host name, get default by extracting /* not an interface and not a host name, get default by extracting
the IP from the control connection */ the IP from the control connection */
sslen = sizeof(ss); sslen = sizeof(ss);
@ -1055,13 +1056,15 @@ static CURLcode ftp_state_use_port(struct connectdata *conn,
switch(sa->sa_family) { switch(sa->sa_family) {
#ifdef ENABLE_IPV6 #ifdef ENABLE_IPV6
case AF_INET6: case AF_INET6:
Curl_inet_ntop(sa->sa_family, &sa6->sin6_addr, hbuf, sizeof(hbuf)); r = Curl_inet_ntop(sa->sa_family, &sa6->sin6_addr, hbuf, sizeof(hbuf));
break; break;
#endif #endif
default: default:
Curl_inet_ntop(sa->sa_family, &sa4->sin_addr, hbuf, sizeof(hbuf)); r = Curl_inet_ntop(sa->sa_family, &sa4->sin_addr, hbuf, sizeof(hbuf));
break; break;
} }
if(!r)
return CURLE_FTP_PORT_FAILED;
host = hbuf; /* use this host name */ host = hbuf; /* use this host name */
possibly_non_local = FALSE; /* we know it is local now */ possibly_non_local = FALSE; /* we know it is local now */
} }

13
lib/if2ip.c
View File

@ -118,7 +118,7 @@ if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
if(iface->ifa_addr->sa_family == af) { if(iface->ifa_addr->sa_family == af) {
if(strcasecompare(iface->ifa_name, interf)) { if(strcasecompare(iface->ifa_name, interf)) {
void *addr; void *addr;
char *ip; const char *ip;
char scope[12] = ""; char scope[12] = "";
char ipstr[64]; char ipstr[64];
#ifdef ENABLE_IPV6 #ifdef ENABLE_IPV6
@ -153,15 +153,15 @@ if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
} }
if(scopeid) if(scopeid)
msnprintf(scope, sizeof(scope), "%%%u", scopeid); msnprintf(scope, sizeof(scope), "%%%u", scopeid);
#endif #endif
} }
else else
#endif #endif
addr = addr =
&((struct sockaddr_in *)(void *)iface->ifa_addr)->sin_addr; &((struct sockaddr_in *)(void *)iface->ifa_addr)->sin_addr;
res = IF2IP_FOUND; res = IF2IP_FOUND;
ip = (char *) Curl_inet_ntop(af, addr, ipstr, sizeof(ipstr)); ip = Curl_inet_ntop(af, addr, ipstr, sizeof(ipstr));
msnprintf(buf, buf_size, "%s%s", ip, scope); msnprintf(buf, buf_size, "%s%s", ip, scope);
break; break;
} }
@ -190,6 +190,7 @@ if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
struct sockaddr_in *s; struct sockaddr_in *s;
curl_socket_t dummy; curl_socket_t dummy;
size_t len; size_t len;
const char *r;
(void)remote_scope; (void)remote_scope;
(void)local_scope_id; (void)local_scope_id;
@ -219,9 +220,11 @@ if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope,
s = (struct sockaddr_in *)(void *)&req.ifr_addr; s = (struct sockaddr_in *)(void *)&req.ifr_addr;
memcpy(&in, &s->sin_addr, sizeof(in)); memcpy(&in, &s->sin_addr, sizeof(in));
Curl_inet_ntop(s->sin_family, &in, buf, buf_size); r = Curl_inet_ntop(s->sin_family, &in, buf, buf_size);
sclose(dummy); sclose(dummy);
if(!r)
return IF2IP_NOT_FOUND;
return IF2IP_FOUND; return IF2IP_FOUND;
} }