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fix getaddrinfo to accept port 0 (zero)

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new behavior can be summarized as:
inputs that parse completely as a decimal number are treated as one,
and rejected only if the result is out of 16-bit range.
inputs that do not parse as a decimal number (where strtoul leaves
anything left over in the input) are searched in /etc/services.
This commit is contained in:
Rich Felker
2012-09-22 16:19:06 -04:00
parent 15d1112032
commit 4b49060da0
1 changed files with 2 additions and 2 deletions
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4
src/network/getaddrinfo.c
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@ -76,8 +76,7 @@ int getaddrinfo(const char *restrict host, const char *restrict serv, const stru
if (serv) { if (serv) {
if (!*serv) return EAI_SERVICE; if (!*serv) return EAI_SERVICE;
port = strtoul(serv, &z, 10); port = strtoul(serv, &z, 10);
if (!*z && port > 65535) return EAI_SERVICE; if (*z) {
if (!port) {
size_t servlen = strlen(serv); size_t servlen = strlen(serv);
char *end = line; char *end = line;
@ -96,6 +95,7 @@ int getaddrinfo(const char *restrict host, const char *restrict serv, const stru
__fclose_ca(f); __fclose_ca(f);
if (feof(f)) return EAI_SERVICE; if (feof(f)) return EAI_SERVICE;
} }
if (port > 65535) return EAI_SERVICE;
port = htons(port); port = htons(port);
} }