diff options
Diffstat (limited to 'src/attr.c')
| -rw-r--r-- | src/attr.c | 71 |
1 files changed, 42 insertions, 29 deletions
@@ -11,6 +11,7 @@ #include <string.h> #include <values.h> /* for INT_MAX */ #include <errno.h> +#include "internal.h" /** * \defgroup attr Netlink attribute helpers @@ -35,7 +36,7 @@ * * This function returns the attribute type. */ -uint16_t mnl_attr_get_type(const struct nlattr *attr) +EXPORT_SYMBOL uint16_t mnl_attr_get_type(const struct nlattr *attr) { return attr->nla_type & NLA_TYPE_MASK; } @@ -47,7 +48,7 @@ uint16_t mnl_attr_get_type(const struct nlattr *attr) * This function returns the attribute length that is the attribute header * plus the attribute payload. */ -uint16_t mnl_attr_get_len(const struct nlattr *attr) +EXPORT_SYMBOL uint16_t mnl_attr_get_len(const struct nlattr *attr) { return attr->nla_len; } @@ -58,7 +59,7 @@ uint16_t mnl_attr_get_len(const struct nlattr *attr) * * This function returns the attribute payload-value length. */ -uint16_t mnl_attr_get_payload_len(const struct nlattr *attr) +EXPORT_SYMBOL uint16_t mnl_attr_get_payload_len(const struct nlattr *attr) { return attr->nla_len - MNL_ATTR_HDRLEN; } @@ -69,7 +70,7 @@ uint16_t mnl_attr_get_payload_len(const struct nlattr *attr) * * This function return a pointer to the attribute payload. */ -void *mnl_attr_get_payload(const struct nlattr *attr) +EXPORT_SYMBOL void *mnl_attr_get_payload(const struct nlattr *attr) { return (void *)attr + MNL_ATTR_HDRLEN; } @@ -90,7 +91,7 @@ void *mnl_attr_get_payload(const struct nlattr *attr) * The len parameter may be negative in the case of malformed messages during * attribute iteration, that is why we use a signed integer. */ -bool mnl_attr_ok(const struct nlattr *attr, int len) +EXPORT_SYMBOL bool mnl_attr_ok(const struct nlattr *attr, int len) { return len >= (int)sizeof(struct nlattr) && attr->nla_len >= sizeof(struct nlattr) && @@ -106,7 +107,7 @@ bool mnl_attr_ok(const struct nlattr *attr, int len) * as parameter. You have to use mnl_attr_ok() to ensure that the next * attribute is valid. */ -struct nlattr *mnl_attr_next(const struct nlattr *attr) +EXPORT_SYMBOL struct nlattr *mnl_attr_next(const struct nlattr *attr) { return (struct nlattr *)((void *)attr + MNL_ALIGN(attr->nla_len)); } @@ -125,7 +126,7 @@ struct nlattr *mnl_attr_next(const struct nlattr *attr) * This leads to backward compatibility breakages in user-space. Better check * if you support an attribute, if not, skip it. */ -int mnl_attr_type_valid(const struct nlattr *attr, uint16_t max) +EXPORT_SYMBOL int mnl_attr_type_valid(const struct nlattr *attr, uint16_t max) { if (mnl_attr_get_type(attr) > max) { errno = EOPNOTSUPP; @@ -204,7 +205,8 @@ static const size_t mnl_attr_data_type_len[MNL_TYPE_MAX] = { * integers (u8, u16, u32 and u64) have enough room for them. This function * returns -1 in case of error, and errno is explicitly set. */ -int mnl_attr_validate(const struct nlattr *attr, enum mnl_attr_data_type type) +EXPORT_SYMBOL int +mnl_attr_validate(const struct nlattr *attr, enum mnl_attr_data_type type) { int exp_len; @@ -226,8 +228,9 @@ int mnl_attr_validate(const struct nlattr *attr, enum mnl_attr_data_type type) * whose size is variable. If the size of the attribute is not what we expect, * this functions returns -1 and errno is explicitly set. */ -int mnl_attr_validate2(const struct nlattr *attr, - enum mnl_attr_data_type type, size_t exp_len) +EXPORT_SYMBOL int +mnl_attr_validate2(const struct nlattr *attr, enum mnl_attr_data_type type, + size_t exp_len) { if (type >= MNL_TYPE_MAX) { errno = EINVAL; @@ -251,8 +254,9 @@ int mnl_attr_validate2(const struct nlattr *attr, * This function propagates the return value of the callback, which can be * MNL_CB_ERROR, MNL_CB_OK or MNL_CB_STOP. */ -int mnl_attr_parse(const struct nlmsghdr *nlh, unsigned int offset, - mnl_attr_cb_t cb, void *data) +EXPORT_SYMBOL int +mnl_attr_parse(const struct nlmsghdr *nlh, unsigned int offset, + mnl_attr_cb_t cb, void *data) { int ret = MNL_CB_OK; const struct nlattr *attr; @@ -277,8 +281,9 @@ int mnl_attr_parse(const struct nlmsghdr *nlh, unsigned int offset, * This function propagates the return value of the callback, which can be * MNL_CB_ERROR, MNL_CB_OK or MNL_CB_STOP. */ -int mnl_attr_parse_nested(const struct nlattr *nested, - mnl_attr_cb_t cb, void *data) +EXPORT_SYMBOL int +mnl_attr_parse_nested(const struct nlattr *nested, mnl_attr_cb_t cb, + void *data) { int ret = MNL_CB_OK; const struct nlattr *attr; @@ -295,7 +300,7 @@ int mnl_attr_parse_nested(const struct nlattr *nested, * * This function returns the 8-bit value of the attribute payload. */ -uint8_t mnl_attr_get_u8(const struct nlattr *attr) +EXPORT_SYMBOL uint8_t mnl_attr_get_u8(const struct nlattr *attr) { return *((uint8_t *)mnl_attr_get_payload(attr)); } @@ -306,7 +311,7 @@ uint8_t mnl_attr_get_u8(const struct nlattr *attr) * * This function returns the 16-bit value of the attribute payload. */ -uint16_t mnl_attr_get_u16(const struct nlattr *attr) +EXPORT_SYMBOL uint16_t mnl_attr_get_u16(const struct nlattr *attr) { return *((uint16_t *)mnl_attr_get_payload(attr)); } @@ -317,7 +322,7 @@ uint16_t mnl_attr_get_u16(const struct nlattr *attr) * * This function returns the 32-bit value of the attribute payload. */ -uint32_t mnl_attr_get_u32(const struct nlattr *attr) +EXPORT_SYMBOL uint32_t mnl_attr_get_u32(const struct nlattr *attr) { return *((uint32_t *)mnl_attr_get_payload(attr)); } @@ -330,7 +335,7 @@ uint32_t mnl_attr_get_u32(const struct nlattr *attr) * function is align-safe, since accessing 64-bit Netlink attributes is a * common source of alignment issues. */ -uint64_t mnl_attr_get_u64(const struct nlattr *attr) +EXPORT_SYMBOL uint64_t mnl_attr_get_u64(const struct nlattr *attr) { uint64_t tmp; memcpy(&tmp, mnl_attr_get_payload(attr), sizeof(tmp)); @@ -343,7 +348,7 @@ uint64_t mnl_attr_get_u64(const struct nlattr *attr) * * This function returns the payload of string attribute value. */ -const char *mnl_attr_get_str(const struct nlattr *attr) +EXPORT_SYMBOL const char *mnl_attr_get_str(const struct nlattr *attr) { return mnl_attr_get_payload(attr); } @@ -358,8 +363,8 @@ const char *mnl_attr_get_str(const struct nlattr *attr) * This function updates the length field of the Netlink message (nlmsg_len) * by adding the size (header + payload) of the new attribute. */ -void mnl_attr_put(struct nlmsghdr *nlh, uint16_t type, - size_t len, const void *data) +EXPORT_SYMBOL void +mnl_attr_put(struct nlmsghdr *nlh, uint16_t type, size_t len, const void *data) { struct nlattr *attr = mnl_nlmsg_get_payload_tail(nlh); uint16_t payload_len = MNL_ALIGN(sizeof(struct nlattr)) + len; @@ -380,7 +385,8 @@ void mnl_attr_put(struct nlmsghdr *nlh, uint16_t type, * This function updates the length field of the Netlink message (nlmsg_len) * by adding the size (header + payload) of the new attribute. */ -void mnl_attr_put_u8(struct nlmsghdr *nlh, uint16_t type, uint8_t data) +EXPORT_SYMBOL void +mnl_attr_put_u8(struct nlmsghdr *nlh, uint16_t type, uint8_t data) { mnl_attr_put(nlh, type, sizeof(uint8_t), &data); } @@ -394,7 +400,8 @@ void mnl_attr_put_u8(struct nlmsghdr *nlh, uint16_t type, uint8_t data) * This function updates the length field of the Netlink message (nlmsg_len) * by adding the size (header + payload) of the new attribute. */ -void mnl_attr_put_u16(struct nlmsghdr *nlh, uint16_t type, uint16_t data) +EXPORT_SYMBOL void +mnl_attr_put_u16(struct nlmsghdr *nlh, uint16_t type, uint16_t data) { mnl_attr_put(nlh, type, sizeof(uint16_t), &data); } @@ -408,7 +415,8 @@ void mnl_attr_put_u16(struct nlmsghdr *nlh, uint16_t type, uint16_t data) * This function updates the length field of the Netlink message (nlmsg_len) * by adding the size (header + payload) of the new attribute. */ -void mnl_attr_put_u32(struct nlmsghdr *nlh, uint16_t type, uint32_t data) +EXPORT_SYMBOL void +mnl_attr_put_u32(struct nlmsghdr *nlh, uint16_t type, uint32_t data) { mnl_attr_put(nlh, type, sizeof(uint32_t), &data); } @@ -422,7 +430,8 @@ void mnl_attr_put_u32(struct nlmsghdr *nlh, uint16_t type, uint32_t data) * This function updates the length field of the Netlink message (nlmsg_len) * by adding the size (header + payload) of the new attribute. */ -void mnl_attr_put_u64(struct nlmsghdr *nlh, uint16_t type, uint64_t data) +EXPORT_SYMBOL void +mnl_attr_put_u64(struct nlmsghdr *nlh, uint16_t type, uint64_t data) { mnl_attr_put(nlh, type, sizeof(uint64_t), &data); } @@ -436,7 +445,8 @@ void mnl_attr_put_u64(struct nlmsghdr *nlh, uint16_t type, uint64_t data) * This function updates the length field of the Netlink message (nlmsg_len) * by adding the size (header + payload) of the new attribute. */ -void mnl_attr_put_str(struct nlmsghdr *nlh, uint16_t type, const char *data) +EXPORT_SYMBOL void +mnl_attr_put_str(struct nlmsghdr *nlh, uint16_t type, const char *data) { mnl_attr_put(nlh, type, strlen(data), data); } @@ -453,7 +463,8 @@ void mnl_attr_put_str(struct nlmsghdr *nlh, uint16_t type, const char *data) * This function updates the length field of the Netlink message (nlmsg_len) * by adding the size (header + payload) of the new attribute. */ -void mnl_attr_put_strz(struct nlmsghdr *nlh, uint16_t type, const char *data) +EXPORT_SYMBOL void +mnl_attr_put_strz(struct nlmsghdr *nlh, uint16_t type, const char *data) { mnl_attr_put(nlh, type, strlen(data)+1, data); } @@ -467,7 +478,8 @@ void mnl_attr_put_strz(struct nlmsghdr *nlh, uint16_t type, const char *data) * an attribute nest. This function always returns a valid pointer to the * beginning of the nest. */ -struct nlattr *mnl_attr_nest_start(struct nlmsghdr *nlh, uint16_t type) +EXPORT_SYMBOL struct nlattr * +mnl_attr_nest_start(struct nlmsghdr *nlh, uint16_t type) { struct nlattr *start = mnl_nlmsg_get_payload_tail(nlh); @@ -485,7 +497,8 @@ struct nlattr *mnl_attr_nest_start(struct nlmsghdr *nlh, uint16_t type) * * This function updates the attribute header that identifies the nest. */ -void mnl_attr_nest_end(struct nlmsghdr *nlh, struct nlattr *start) +EXPORT_SYMBOL void +mnl_attr_nest_end(struct nlmsghdr *nlh, struct nlattr *start) { start->nla_len = mnl_nlmsg_get_payload_tail(nlh) - (void *)start; } |