From 5e1a84ab74d5e97582427f016f291a8c11e66f99 Mon Sep 17 00:00:00 2001 From: jutteau Date: Fri, 11 May 2007 18:10:19 +0000 Subject: Completion du script de mise à jour de la pc-104 : * Ajout des sources de busybox dans ./conf/busybox/ * Ajout d'un fichier réclamé par les script dans ./conf/busybox.links --- .../initrd/conf/busybox/networking/udhcp/script.c | 224 +++++++++++++++++++++ 1 file changed, 224 insertions(+) create mode 100644 i/pc104/initrd/conf/busybox/networking/udhcp/script.c (limited to 'i/pc104/initrd/conf/busybox/networking/udhcp/script.c') diff --git a/i/pc104/initrd/conf/busybox/networking/udhcp/script.c b/i/pc104/initrd/conf/busybox/networking/udhcp/script.c new file mode 100644 index 0000000..dc8ff7a --- /dev/null +++ b/i/pc104/initrd/conf/busybox/networking/udhcp/script.c @@ -0,0 +1,224 @@ +/* vi: set sw=4 ts=4: */ +/* script.c + * + * Functions to call the DHCP client notification scripts + * + * Russ Dill July 2001 + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#include "common.h" +#include "dhcpd.h" +#include "dhcpc.h" +#include "options.h" + + +/* get a rough idea of how long an option will be (rounding up...) */ +static const int max_option_length[] = { + [OPTION_IP] = sizeof("255.255.255.255 "), + [OPTION_IP_PAIR] = sizeof("255.255.255.255 ") * 2, + [OPTION_STRING] = 1, +#if ENABLE_FEATURE_RFC3397 + [OPTION_STR1035] = 1, +#endif + [OPTION_BOOLEAN] = sizeof("yes "), + [OPTION_U8] = sizeof("255 "), + [OPTION_U16] = sizeof("65535 "), + [OPTION_S16] = sizeof("-32768 "), + [OPTION_U32] = sizeof("4294967295 "), + [OPTION_S32] = sizeof("-2147483684 "), +}; + + +static inline int upper_length(int length, int opt_index) +{ + return max_option_length[opt_index] * + (length / option_lengths[opt_index]); +} + + +static int sprintip(char *dest, const char *pre, const uint8_t *ip) +{ + return sprintf(dest, "%s%d.%d.%d.%d", pre, ip[0], ip[1], ip[2], ip[3]); +} + + +/* really simple implementation, just count the bits */ +static int mton(struct in_addr *mask) +{ + int i; + unsigned long bits = ntohl(mask->s_addr); + /* too bad one can't check the carry bit, etc in c bit + * shifting */ + for (i = 0; i < 32 && !((bits >> i) & 1); i++); + return 32 - i; +} + + +/* Allocate and fill with the text of option 'option'. */ +static char *alloc_fill_opts(uint8_t *option, const struct dhcp_option *type_p) +{ + int len, type, optlen; + uint16_t val_u16; + int16_t val_s16; + uint32_t val_u32; + int32_t val_s32; + char *dest, *ret; + + len = option[OPT_LEN - 2]; + type = type_p->flags & TYPE_MASK; + optlen = option_lengths[type]; + + dest = ret = xmalloc(upper_length(len, type) + strlen(type_p->name) + 2); + dest += sprintf(ret, "%s=", type_p->name); + + for (;;) { + switch (type) { + case OPTION_IP_PAIR: + dest += sprintip(dest, "", option); + *(dest++) = '/'; + option += 4; + optlen = 4; + case OPTION_IP: /* Works regardless of host byte order. */ + dest += sprintip(dest, "", option); + break; + case OPTION_BOOLEAN: + dest += sprintf(dest, *option ? "yes" : "no"); + break; + case OPTION_U8: + dest += sprintf(dest, "%u", *option); + break; + case OPTION_U16: + memcpy(&val_u16, option, 2); + dest += sprintf(dest, "%u", ntohs(val_u16)); + break; + case OPTION_S16: + memcpy(&val_s16, option, 2); + dest += sprintf(dest, "%d", ntohs(val_s16)); + break; + case OPTION_U32: + memcpy(&val_u32, option, 4); + dest += sprintf(dest, "%lu", (unsigned long) ntohl(val_u32)); + break; + case OPTION_S32: + memcpy(&val_s32, option, 4); + dest += sprintf(dest, "%ld", (long) ntohl(val_s32)); + break; + case OPTION_STRING: + memcpy(dest, option, len); + dest[len] = '\0'; + return ret; /* Short circuit this case */ +#if ENABLE_FEATURE_RFC3397 + case OPTION_STR1035: + /* unpack option into dest; use ret for prefix (i.e., "optname=") */ + dest = dname_dec(option, len, ret); + free(ret); + return dest; +#endif + } + option += optlen; + len -= optlen; + if (len <= 0) break; + dest += sprintf(dest, " "); + } + return ret; +} + + +/* put all the parameters into an environment */ +static char **fill_envp(struct dhcpMessage *packet) +{ + int num_options = 0; + int i, j; + char **envp; + uint8_t *temp; + struct in_addr subnet; + char over = 0; + + if (packet == NULL) + num_options = 0; + else { + for (i = 0; dhcp_options[i].code; i++) + if (get_option(packet, dhcp_options[i].code)) { + num_options++; + if (dhcp_options[i].code == DHCP_SUBNET) + num_options++; /* for mton */ + } + if (packet->siaddr) num_options++; + if ((temp = get_option(packet, DHCP_OPTION_OVER))) + over = *temp; + if (!(over & FILE_FIELD) && packet->file[0]) num_options++; + if (!(over & SNAME_FIELD) && packet->sname[0]) num_options++; + } + + envp = xzalloc(sizeof(char *) * (num_options + 5)); + j = 0; + envp[j++] = xasprintf("interface=%s", client_config.interface); + envp[j++] = xasprintf("PATH=%s", + getenv("PATH") ? : "/bin:/usr/bin:/sbin:/usr/sbin"); + envp[j++] = xasprintf("HOME=%s", getenv("HOME") ? : "/"); + + if (packet == NULL) return envp; + + envp[j] = xmalloc(sizeof("ip=255.255.255.255")); + sprintip(envp[j++], "ip=", (uint8_t *) &packet->yiaddr); + + for (i = 0; dhcp_options[i].code; i++) { + temp = get_option(packet, dhcp_options[i].code); + if (!temp) + continue; + envp[j++] = alloc_fill_opts(temp, &dhcp_options[i]); + + /* Fill in a subnet bits option for things like /24 */ + if (dhcp_options[i].code == DHCP_SUBNET) { + memcpy(&subnet, temp, 4); + envp[j++] = xasprintf("mask=%d", mton(&subnet)); + } + } + if (packet->siaddr) { + envp[j] = xmalloc(sizeof("siaddr=255.255.255.255")); + sprintip(envp[j++], "siaddr=", (uint8_t *) &packet->siaddr); + } + if (!(over & FILE_FIELD) && packet->file[0]) { + /* watch out for invalid packets */ + packet->file[sizeof(packet->file) - 1] = '\0'; + envp[j++] = xasprintf("boot_file=%s", packet->file); + } + if (!(over & SNAME_FIELD) && packet->sname[0]) { + /* watch out for invalid packets */ + packet->sname[sizeof(packet->sname) - 1] = '\0'; + envp[j++] = xasprintf("sname=%s", packet->sname); + } + return envp; +} + + +/* Call a script with a par file and env vars */ +void udhcp_run_script(struct dhcpMessage *packet, const char *name) +{ + int pid; + char **envp, **curr; + + if (client_config.script == NULL) + return; + + DEBUG("vfork'ing and execle'ing %s", client_config.script); + + envp = fill_envp(packet); + /* call script */ + pid = vfork(); + if (pid) { + waitpid(pid, NULL, 0); + for (curr = envp; *curr; curr++) free(*curr); + free(envp); + return; + } else if (pid == 0) { + /* close fd's? */ + /* exec script */ + execle(client_config.script, client_config.script, + name, NULL, envp); + bb_perror_msg("script %s failed", client_config.script); + exit(1); + } +} -- cgit v1.2.3