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Tue, 3 Aug 2021 14:29:29 -0700 (PDT) X-DH-BACKEND: pdx1-sub0-mail-a4 To: libc-alpha@sourceware.org Subject: [PATCH 1/5] gaiconf_init: Refactor some bits for readability Date: Wed, 4 Aug 2021 02:59:15 +0530 Message-Id: <20210803212919.3059194-2-siddhesh@sourceware.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210803212919.3059194-1-siddhesh@sourceware.org> References: <20210803212919.3059194-1-siddhesh@sourceware.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Siddhesh Poyarekar via Libc-alpha Reply-To: Siddhesh Poyarekar Errors-To: libc-alpha-bounces+e=80x24.org@sourceware.org Sender: "Libc-alpha" Split out line processing for `label`, `precedence` and `scopev4` into separate functions instead of the gotos. --- sysdeps/posix/getaddrinfo.c | 149 ++++++++++++++++++++---------------- 1 file changed, 84 insertions(+), 65 deletions(-) diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c index 9f1cde27b5..f222c2a62f 100644 --- a/sysdeps/posix/getaddrinfo.c +++ b/sysdeps/posix/getaddrinfo.c @@ -1761,6 +1761,66 @@ scopecmp (const void *p1, const void *p2) return 1; } =20 +static bool +add_prefixlist (struct prefixlist **listp, size_t *lenp, bool *nullbitsp= , + char *val1, char *val2, char **pos) +{ + struct in6_addr prefix; + unsigned long int bits; + unsigned long int val; + char *endp; + + bits =3D 128; + __set_errno (0); + char *cp =3D strchr (val1, '/'); + if (cp !=3D NULL) + *cp++ =3D '\0'; + *pos =3D cp; + if (inet_pton (AF_INET6, val1, &prefix) + && (cp =3D=3D NULL + || (bits =3D strtoul (cp, &endp, 10)) !=3D ULONG_MAX + || errno !=3D ERANGE) + && *endp =3D=3D '\0' + && bits <=3D 128 + && ((val =3D strtoul (val2, &endp, 10)) !=3D ULONG_MAX + || errno !=3D ERANGE) + && *endp =3D=3D '\0' + && val <=3D INT_MAX) + { + struct prefixlist *newp =3D malloc (sizeof (*newp)); + if (newp =3D=3D NULL) + return false; + + memcpy (&newp->entry.prefix, &prefix, sizeof (prefix)); + newp->entry.bits =3D bits; + newp->entry.val =3D val; + newp->next =3D *listp; + *listp =3D newp; + ++*lenp; + *nullbitsp |=3D bits =3D=3D 0; + } + return true; +} + +static bool +add_scopelist (struct scopelist **listp, size_t *lenp, bool *nullbitsp, + const struct in6_addr *prefixp, unsigned long int bits, + unsigned long int val) +{ + struct scopelist *newp =3D malloc (sizeof (*newp)); + if (newp =3D=3D NULL) + return false; + + newp->entry.netmask =3D htonl (bits !=3D 96 ? (0xffffffff << (128 - bi= ts)) : 0); + newp->entry.addr32 =3D (prefixp->s6_addr32[3] & newp->entry.netmask); + newp->entry.scope =3D val; + newp->next =3D *listp; + *listp =3D newp; + ++*lenp; + *nullbitsp |=3D bits =3D=3D 96; + + return true; +} =20 static void gaiconf_init (void) @@ -1836,55 +1896,17 @@ gaiconf_init (void) /* Ignore the rest of the line. */ *cp =3D '\0'; =20 - struct prefixlist **listp; - size_t *lenp; - bool *nullbitsp; switch (cmdlen) { case 5: if (strcmp (cmd, "label") =3D=3D 0) { - struct in6_addr prefix; - unsigned long int bits; - unsigned long int val; - char *endp; - - listp =3D &labellist; - lenp =3D &nlabellist; - nullbitsp =3D &labellist_nullbits; - - new_elem: - bits =3D 128; - __set_errno (0); - cp =3D strchr (val1, '/'); - if (cp !=3D NULL) - *cp++ =3D '\0'; - if (inet_pton (AF_INET6, val1, &prefix) - && (cp =3D=3D NULL - || (bits =3D strtoul (cp, &endp, 10)) !=3D ULONG_MAX - || errno !=3D ERANGE) - && *endp =3D=3D '\0' - && bits <=3D 128 - && ((val =3D strtoul (val2, &endp, 10)) !=3D ULONG_MAX - || errno !=3D ERANGE) - && *endp =3D=3D '\0' - && val <=3D INT_MAX) + if (!add_prefixlist (&labellist, &nlabellist, + &labellist_nullbits, val1, val2, &cp)) { - struct prefixlist *newp =3D malloc (sizeof (*newp)); - if (newp =3D=3D NULL) - { - free (line); - fclose (fp); - goto no_file; - } - - memcpy (&newp->entry.prefix, &prefix, sizeof (prefix)); - newp->entry.bits =3D bits; - newp->entry.val =3D val; - newp->next =3D *listp; - *listp =3D newp; - ++*lenp; - *nullbitsp |=3D bits =3D=3D 0; + free (line); + fclose (fp); + goto no_file; } } break; @@ -1926,27 +1948,14 @@ gaiconf_init (void) && *endp =3D=3D '\0' && val <=3D INT_MAX) { - struct scopelist *newp; - new_scope: - newp =3D malloc (sizeof (*newp)); - if (newp =3D=3D NULL) + if (!add_scopelist (&scopelist, &nscopelist, + &scopelist_nullbits, &prefix, + bits, val)) { free (line); fclose (fp); goto no_file; } - - newp->entry.netmask =3D htonl (bits !=3D 96 - ? (0xffffffff - << (128 - bits)) - : 0); - newp->entry.addr32 =3D (prefix.s6_addr32[3] - & newp->entry.netmask); - newp->entry.scope =3D val; - newp->next =3D scopelist; - scopelist =3D newp; - ++nscopelist; - scopelist_nullbits |=3D bits =3D=3D 96; } } else if (inet_pton (AF_INET, val1, &prefix.s6_addr32[3]) @@ -1960,8 +1969,14 @@ gaiconf_init (void) && *endp =3D=3D '\0' && val <=3D INT_MAX) { - bits +=3D 96; - goto new_scope; + if (!add_scopelist (&scopelist, &nscopelist, + &scopelist_nullbits, &prefix, + bits + 96, val)) + { + free (line); + fclose (fp); + goto no_file; + } } } break; @@ -1969,10 +1984,14 @@ gaiconf_init (void) case 10: if (strcmp (cmd, "precedence") =3D=3D 0) { - listp =3D &precedencelist; - lenp =3D &nprecedencelist; - nullbitsp =3D &precedencelist_nullbits; - goto new_elem; + if (!add_prefixlist (&precedencelist, &nprecedencelist, + &precedencelist_nullbits, val1, val2, + &cp)) + { + free (line); + fclose (fp); + goto no_file; + } } break; } --=20 2.31.1