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socks5: please static code analyzer

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Make sure we don't call memcpy() if the argument is NULL even
though we also passed a zero length then, as the clang analyzer
whined and we want to limit warnings (even false positives) when
they're this easy to fix.

The change of (char) to (unsigned char) will fix long user names
and passwords on systems that have the char type signed by
default.
This commit is contained in:
Daniel Stenberg 2010-04-24 12:40:00 +02:00
parent 5b40c11c2f
commit 7fb7f24131
1 changed files with 6 additions and 4 deletions
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10
lib/socks.c
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@ -511,11 +511,13 @@ CURLcode Curl_SOCKS5(const char *proxy_name,
*/ */
len = 0; len = 0;
socksreq[len++] = 1; /* username/pw subnegotiation version */ socksreq[len++] = 1; /* username/pw subnegotiation version */
socksreq[len++] = (char) userlen; socksreq[len++] = (unsigned char) userlen;
memcpy(socksreq + len, proxy_name, userlen); if(proxy_name && userlen)
memcpy(socksreq + len, proxy_name, userlen);
len += (int)userlen; len += (int)userlen;
socksreq[len++] = (char) pwlen; socksreq[len++] = (unsigned char) pwlen;
memcpy(socksreq + len, proxy_password, pwlen); if(proxy_password && pwlen)
memcpy(socksreq + len, proxy_password, pwlen);
len += (int)pwlen; len += (int)pwlen;
code = Curl_write_plain(conn, sock, (char *)socksreq, len, &written); code = Curl_write_plain(conn, sock, (char *)socksreq, len, &written);