diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/udhcp/common.c | 3 | ||||
| -rw-r--r-- | networking/udhcp/dhcpc.c | 19 |
2 files changed, 13 insertions, 9 deletions
diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c index ba41905cc..2e6113627 100644 --- a/networking/udhcp/common.c +++ b/networking/udhcp/common.c @@ -36,6 +36,9 @@ const struct dhcp_optflag dhcp_optflags[] = { { OPTION_STRING , 0x11 }, /* DHCP_ROOT_PATH */ { OPTION_U8 , 0x17 }, /* DHCP_IP_TTL */ { OPTION_U16 , 0x1a }, /* DHCP_MTU */ +//TODO: why do we request DHCP_BROADCAST? Can't we assume that +//in the unlikely case it is different from typical N.N.255.255, +//server would let us know anyway? { OPTION_IP | OPTION_REQ, 0x1c }, /* DHCP_BROADCAST */ { OPTION_IP_PAIR | OPTION_LIST , 0x21 }, /* DHCP_ROUTES */ { OPTION_STRING , 0x28 }, /* DHCP_NIS_DOMAIN */ diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c index d9269f277..d67769e65 100644 --- a/networking/udhcp/dhcpc.c +++ b/networking/udhcp/dhcpc.c @@ -173,16 +173,13 @@ static NOINLINE char *xmalloc_optname_optval(uint8_t *option, const struct dhcp_ dest += sprintf(ret, "%s=", opt_name); while (len >= optlen) { - unsigned ip_ofs = 0; - switch (type) { + case OPTION_IP: case OPTION_IP_PAIR: dest += sprint_nip(dest, "", option); - *dest++ = '/'; - ip_ofs = 4; - /* fall through */ - case OPTION_IP: - dest += sprint_nip(dest, "", option + ip_ofs); + if (type == OPTION_IP) + break; + dest += sprint_nip(dest, "/", option + 4); break; // case OPTION_BOOLEAN: // dest += sprintf(dest, *option ? "yes" : "no"); @@ -204,10 +201,14 @@ static NOINLINE char *xmalloc_optname_optval(uint8_t *option, const struct dhcp_ dest += sprintf(dest, type == OPTION_U32 ? "%lu" : "%ld", (unsigned long) ntohl(val_u32)); break; } + /* Note: options which use 'return' instead of 'break' + * (for example, OPTION_STRING) skip the code which handles + * the case of list of options. + */ case OPTION_STRING: memcpy(dest, option, len); dest[len] = '\0'; - return ret; /* Short circuit this case */ + return ret; case OPTION_STATIC_ROUTES: { /* Option binary format: * mask [one byte, 0..32] @@ -347,7 +348,7 @@ static NOINLINE char *xmalloc_optname_optval(uint8_t *option, const struct dhcp_ // TODO: it can be a list only if (optflag->flags & OPTION_LIST). // Should we bail out/warn if we see multi-ip option which is // not allowed to be such (for example, DHCP_BROADCAST)? - - if (len <= 0 /* || !(optflag->flags & OPTION_LIST) */) + if (len < optlen /* || !(optflag->flags & OPTION_LIST) */) break; *dest++ = ' '; *dest = '\0'; |